Method and device for semi-solid precision rheo-casting of light alloys

The invention discloses a method and device for semi-solid precision rheo-casting of light alloys. A forming cavity of a mould adopts an insert type structure, and a concave mould and a mould insert are respectively divided into a movable part and a fixed part, wherein the movable concave mould and the movable mould insert are connected with a mould clamping cylinder, and can be moved horizontally under the action of the mould clamping cylinder so as to realize the opening and closing of the mould; and the fixed concave mould and the fixed mould insert are connected with an injection system. After a casting is performed by using semi-solid slurry, a semi-solid die-casting is performed by using the injection system, then a press ram drives a forging subplate to carry out casting on the blank of the light alloy, after the completion of the casting, the movable concave mould is drawn out by the mould clamping cylinder, then the finished product is taken out. In the invention, the semi-solid ...

Lost foam wire cutting numerical control machining shaping mill

A vanishing mould digital control linear cutting processing forming machine belongs to automatic machining device, and overcomes the problems of low forming speed and singular function of prior vanishing mould digital control linear cutting processing forming machine. The vanishing mould digital control linear cutting processing forming machine is composed of a mechanical part and a control part. The mechanical part comprises a frame, a tray, an X-axis motor, a Y-axis motor, a Z-axis motor, a X-axis left cylinder slide way, a X-axis right cylinder slide way, a Y-axis cylinder slide way, a Z-axis cylinder slide way, a main shaft motor and the main shaft. The right side of frame is fixed with a bracket. Two ends of Z-direction vertical girder are fixed with an upper cantilever and a lower cantilever. A baiting cutting line is connected between the end of upper cantilever and the end of lower cantilever. An installation plate is installed on the end of main shaft. The installation plate is ...

Method for forming complex formed part through layered extrusion forming, additive manufacturing and synchronous micro-milling

The invention belongs to the technical field of additive manufacturing, and discloses a layered extrusion forming additive manufacturing synchronous micro-milling forming complex forming part method which comprises the following steps: (1) preparing slurry for layered extrusion forming; preparing a 3D printing device for layered extrusion forming, wherein a milling cutter is arranged in a forming cavity of the 3D printing device; (2) multiple green body layers are formed through 3D printing, when the layer number of the newly formed multiple green body layers reaches the preset target layer number, 3D printing of a needle head is interrupted, the printing allowance of the green body layers is milled away through a milling cutter, and the surface is optimized; (3) 3D printing of the needle is recovered, and the step (2) is repeated to obtain an overall green body with the optimized surface; and (4) curing to obtain a formed part. Synchronous micro-milling is implemented in the layered extrusion ...

High-toughness casting aluminum alloy and preparation method thereof

The invention discloses a high-toughness casting aluminum alloy containing the following components in percentage by weight: 9.5-11.0 percent of Mg, 0.1-0.4 percent of Ti, 0.1-0.3 percent of RE, 0.15-0.30 percent of Si and the balance of Al and unavoidable trace impurities, wherein the content of single elements in the trace impurities is less than 0.10 percent, and the total content of the trace impurities is less than 0.50 percent. The invention also discloses a preparation method of the high-toughness casting aluminum alloy. The high-toughness casting aluminum alloy has the advantages of high tensile strength, high elongation, low price of raw materials, short production flow, easy control on the process flow and the like, and complicated smelting equipment and subsequent thermal treatment hot standby are not needed; on the premise of satisfying the mechanical properties of the members, the overall production cost is lower.

Reclaiming method of mixed waste sand for casting

The invention provides a reclaiming method of mixed waste sand for casting. The method comprises the following steps: firstly, classifying waste sand, sieving, drying, dehumidifying and carrying out dry reclamation; secondly, carrying out wet reclamation and dehydration treatment on reclamation sand suitable for wet reclamation and carrying out hot reclamation on reclamation sand suitable for hotreclamation; mixing the two parts of reclamation sand in a certain proportion, and heating and drying wet reclamation sand by utilizing the heat energy of the hot reclamation sand; and finally, regulating humidity and temperature to obtain reclamation sand. The method is used for synchronizing the reclamation on mixed waste sand by originally combining the advantages of a wet reclamation process and a hot reclamation process, thereby avoiding high energy source consumption for later drying of the reclamation sand by adopting a single wet reclamation process and heat waste during reclamation sand ...

3DP synchronous micro-rolling printing method, application and printer

The invention provides a 3DP synchronous micro-rolling printing method, application and a printer, and the method comprises the following steps: slitting a casting mold three-dimensional model to obtain a plurality of printing layers, sequentially carrying out material powder laying and compacting, adhesive spraying, printing layer compacting and leveling and forming of a casting mold blank through the printer, and then carrying out curing and drying treatment to obtain a casting mold; with pressurization of the printing layer, the rolling pressure can be synchronously increased, so that the compactness of a blank can be effectively improved, the shrinkage rate of the blank during curing and drying is small, and an obtained casting mold has good strength, porosity and surface roughness; and meanwhile, material powder laying, compaction and adhesive spraying are synchronously carried out, printing layer rolling and the spraying head resetting process are synchronously carried out, and therefore ...

Foam pattern surface film forming method for lost foam casting

The invention relates to a foam pattern surface film forming method for lost foam casting, belonging to a lost foam casting method, and solving the problems that the film forming matter of the current foam pattern surface film forming method has longer film forming time and high cost. The method of the invention comprises the following steps: (1) a film forming matter preparing step: preparing a wax-based organic composite material of which the raw materials in mass percent are as follows: 60%-100% of wax, 0%-40% of stearic acid and 0%-10% of additives, wherein the range of melting point of the wax-based organic composite material is 40 DEG C-70 DEG C, and then heating to meld the composite material to form mixture; and (2) a film forming step: completely soaking the foam pattern into the mixture and soaking for 5-60s, and then taking out and slightly shaking or whipping to remove the excess liquid mixture, and after cooling, an even film layer is formed on the foam pattern. The invention ...

Transfer paint for foaming mould

The invention discloses transfer paint for lost foam casting. The transfer paint comprises the following compositions in percentage by mass: 18 to 25 percent of styrene, 20 to 30 percent of film forming agent, 15 to 20 percent of acetone, 0.3 to 0.6 percent of foam killer, 0.01 to 0.04 percent of preservative, and the balance being dichloroethane, wherein the film forming agent is arbitrarily one or two of polystyrene, cellulose nitrate and polymethyl methacrylate; the preservative is arbitrarily one or two of sodium benzoate preservative and potassium sorbate preservative; and the foam killer is arbitrarily one of dimethyl silicone polymer, polyoxyethylene polyoxypropylene ether and polyoxypropylene glycerol ether. The prepared transfer paint has proper strength, uniform coating and excellent transfer performance, can adjust viscosity of the paint by changing ingredients, has freely controlled thickness of the coating, can be sprayed on the foaming mould for mould foaming after air-drying ...

Antigravitational vacuum method and apparatus for casting Mg alloy or Al alloy with lost mould

Magnesium alloy casting semi solid-state heat treatment method

Magnesium alloy casting semi solid-state heat treatment method

The magnesium alloy casting reinforcing heat treatment process includes setting the cooled magnesium alloy casting together with its sand box inside a heat treating furnace, heating to some temperature between the solidus line and liquidus line, maintaining for 10-120 min dependant on the thickness of the casting, air cooling outside the furnace to 420-470 deg.c, taking out the casting from the sand box, and cooling inside hot water at 45-95 deg.c to room temperature. The process is suitable for both magnesium alloy casting with evanescent mold and casting with non-evanescent mold, and can obtain round spherical structure, eliminate dendritical structure and raise the strength and elongation of magnesium alloy casting greatly. The process of the present invention has short period, low power consumption and broad application foreground.

Material for surface composite modification of magnesium alloy made by lost foam casting (LFC) and preparation method thereof

The invention discloses a material for surface composite modification of magnesium alloy. The material comprises the following compositions in percentage by mass: 30 to 50 percent of glass dust (with the melting point between 350 and 500 DEG C), 10 to 15 percent of metal powder, 0.4 to 0.6 percent of defoaming agent, 2.0 to 4.0 percent of caking agent, and the balance of water, wherein the glass dust is one of borate glass, phosphate glass and lead-zinc glass; the metal powder is at least one of aluminum powder and zinc powder; the defoaming agent is one of polydimethylsiloxane, polyoxyethylene polyoxypropylene ether and polyoxypropylene glycerol ether; and the caking agent is one of polyvinyl alcohol and sodium carboxymethyl cellulose. The prepared material is coated on a foamy surface to form an alloying layer and a ceramic layer synchronously during magnesium alloy casting; moreover, the compositions of the surface layer of a cast product is in ladderlike distribution from the outside ...

Preparation method and device of semi-solid slurry

The invention discloses a preparation method and a device of semi-solid slurry. Three processes of air current stirring, electromagnetic vibration and addition of heterogeneous nucleating agents are comprehensively utilized by the method. A graphite head with holes is connected with a hollow stirring rod, and a rotating motor drives the stirring rod to rotate through gear transmission and drives the graphite head to rotate; gas passes through a sleeve barrel and reaches the graphite head through the hollow stirring rod, and then, the gas overflows out of small holes, thereby realizing the purposes of blowing and stirring the molten metal in a rotating way; an electromagnetic vibration table can realize electromagnetic vibration on the molten metal in a crucible; the heterogeneous nucleating agents are added into the molten metal to promote further spheroidization and refinement of slurry tissues; after the molten metal is smelted, the graphite head is inserted into the molten metal for ...

Preparation method for refining nickel-based cast superalloy grains through mechanical vibration

The invention discloses a preparation method for refining nickel-based cast superalloy grains through mechanical vibration, and belongs to the technical field of superalloy material preparation.The method comprises the steps that a nickel-based superalloy raw material is put into a vacuum electric arc furnace, multiple times of electric arc melting is continuously carried out in the argon atmosphere, and the nickel-based cast superalloy grains are obtained; carrying out electromagnetic stirring in the smelting process to obtain a melt with uniform components, and solidifying the melt to obtain a button ingot; melting the button ingot in an argon atmosphere in a vacuum arc furnace, pouring the molten button ingot into a casting mold which is in a horizontal periodic mechanical vibration state, and keeping the mechanical vibration until the melt is completely solidified, so as to prepare a nickel-based cast high-temperature alloy; vibration generated by a mechanical vibration device outside ...

Transfer paint for foaming mould

The invention discloses transfer paint for lost foam casting. The transfer paint comprises the following compositions in percentage by mass: 18 to 25 percent of styrene, 20 to 30 percent of film forming agent, 15 to 20 percent of acetone, 0.3 to 0.6 percent of foam killer, 0.01 to 0.04 percent of preservative, and the balance being dichloroethane, wherein the film forming agent is arbitrarily oneor two of polystyrene, cellulose nitrate and polymethyl methacrylate; the preservative is arbitrarily one or two of sodium benzoate preservative and potassium sorbate preservative; and the foam killeris arbitrarily one of dimethyl silicone polymer, polyoxyethylene polyoxypropylene ether and polyoxypropylene glycerol ether. The prepared transfer paint has proper strength, uniform coating and excellent transfer performance, can adjust viscosity of the paint by changing ingredients, has freely controlled thickness of the coating, can be sprayed on the foaming mould for mould foaming after air-drying ...

Preparation method of water-soluble sand core used for aluminium alloy or magnesium alloy thin wall complex casting

The invention discloses a preparation method of a water-soluble sand core used for an aluminium alloy or a magnesium alloy thin wall complex casting, and the method is as follows: (a) at room temperature, preparing magnesium sulfate heptahydrate and plasma water into a 20% to 30% magnesium sulfate aqueous solution, adding specific amount of octadecahydrate aluminum sulfate and an additive into the 20% to 30% magnesium sulfate aqueous solution, and heating to 60 to 80 DEG C to prepare a compound binder; (b) premixing homogeneously foundry raw sand, adding a composite binder to obtain mixture core sand; (c) putting the obtained mixture core sand into a core making mould, then putting the mixture core sand together with the mould into microwave environment for heating, removing and demoulding to obtain a water-soluble sand core product. By the method, the water-soluble sand core with good room temperature strength, moisture resistance, chemical stability and low gas-forming amount can be produced ...

Method for preparing semi-solid state slurry by pouring channel self-stirring technology and device therefor

The invention discloses a device for preparing semi-solid state slurry by pouring channel self-stirring technology, comprising a sprue cup (1) and a snakelike pouring channel (2) which are communicated with each other, wherein, the snakelike pouring channel (2) is formed by a vertical pouring channel part (2.1), a first arch bent channel (2.2) having buffer action, a second arch bent channel (2.3)having the buffer action, a concave pouring channel bottom nest (2.4) arranged at the bottom of the snakelike pouring channel (2) and an approximately horizontal inner pouring channel (2.5) which aresequentially communicated with each other. The semi-solid state slurry can be prepared by pouring alloy with the degree of superheat being 0-150 DEG C in the device. The obtained semi-solid state slurry has the advantages of fine grain structure, even distribution and low manufacturing cost.

Follow-up falling-type powder laying device

The invention discloses a follow-up falling-type powder laying device. The powder laying device is used for laying powder during rapid powdered material formation, and belongs to the field of rapid powdered material formation. The powder laying device comprises a workbench, a linear guide rail and a sliding block on the guide rail, wherein a powder laying port is formed in the workbench, the sliding block is used for supporting a support plate which is provided with a through port and is positioned on the sliding block, and two scraper adjusting blocks are relatively and fixedly arranged on the two sides of the through port of the support plate; the slope-shaped inner walls of the two scraper adjusting blocks are oppositely formed into a funnel-shaped through port, scrapers are of a block shape with a slope-shaped inner wall and a blade, and the two scrapers are respectively, oppositely and detachably arranged on the bottom of the scraper adjusting blocks; the slope-shaped inner walls of ...

Reclaiming method of mixed waste sand for casting

The invention provides a reclaiming method of mixed waste sand for casting. The method comprises the following steps: firstly, classifying waste sand, sieving, drying, dehumidifying and carrying out dry reclamation; secondly, carrying out wet reclamation and dehydration treatment on reclamation sand suitable for wet reclamation and carrying out hot reclamation on reclamation sand suitable for hot reclamation; mixing the two parts of reclamation sand in a certain proportion, and heating and drying wet reclamation sand by utilizing the heat energy of the hot reclamation sand; and finally, regulating humidity and temperature to obtain reclamation sand. The method is used for synchronizing the reclamation on mixed waste sand by originally combining the advantages of a wet reclamation process and a hot reclamation process, thereby avoiding high energy source consumption for later drying of the reclamation sand by adopting a single wet reclamation process and heat waste during reclamation sand ...

Powdery paint for lost foam casting of cast iron

The invention discloses a special coating for pulverous expendable pattern casting and casting iron, and the special coating comprises 60-70 percent of 180-200 mesh refractory materials, 2.0-3.0 percent of suspending agent, 1.5-2.5 percent of adhesive, 0.3-0.6 percent of organosilicon defoamer, 0.01-0.03 percent of preservative agent and 180-200 mesh residual mica powder in balancing amount. When the special coating is prepared, various pulverous materials are weighed according to the required proportion, interposed into the powder stirrer in sequence to stir for 20 to 40 minutes at a low speed and then discharged and packed. When the coating is used, appropriate water is interposed into the stirred vessel by the powder-to-water ratio of 1 to (1.1-1.4). After the stirred vessel is turned on, the powder coating weighed is interposed in batches. The coating is utilized after preparing into slurry; therefore, the special coating has the advantages of good suspension property, high intensity ...

Nickel-cobalt alloy synergistically strengthened and toughened by utilizing interaction of trace elements and preparation method of nickel-cobalt alloy

The invention belongs to the field of casting component design and preparation, and discloses a nickel-cobalt alloy synergistically strengthened and toughened by means of microelement interaction and preparation, the nickel-cobalt alloy is Ni [50-x] Co [50-x] Ti [x] C [x], x is 0.3-0.7; in the nickel-cobalt alloy, the atomic percentage of the Ni element and the atomic percentage of the Co element are both (50-x)%, and the atomic percentage of the Ti element and the atomic percentage of the C element are both x%; and by introducing the Ti element and the C element, the strength and toughness of the nickel-cobalt alloy can be improved at the same time. According to the invention, Ti and C elements with proper interaction strength are selected, and the contents of solute elements Ti and C are controlled, so that obvious element segregation characteristics are generated in the alloy solidification process, and other phases are not formed while element clusters are formed, that is, under the ...

Foam pattern surface film forming method for lost foam casting

The invention relates to a foam pattern surface film forming method for lost foam casting, belonging to a lost foam casting method, and solving the problems that the film forming matter of the current foam pattern surface film forming method has longer film forming time and high cost. The method of the invention comprises the following steps: (1) a film forming matter preparing step: preparing a wax-based organic composite material of which the raw materials in mass percent are as follows: 60%-100% of wax, 0%-40% of stearic acid and 0%-10% of additives, wherein the range of melting point of the wax-based organic composite material is 40 DEG C-70 DEG C, and then heating to meld the composite material to form mixture; and (2) a film forming step: completely soaking the foam pattern into themixture and soaking for 5-60s, and then taking out and slightly shaking or whipping to remove the excess liquid mixture, and after cooling, an even film layer is formed on the foam pattern. The invention ...

Microwave heating method for water glass sand mold or sand core

The invention provides a microwave hardening method of water glass sand mold or sand core, belonging to the sand mold hardening method in casting industry. The method solves the problems that the existing microwave heating hardened water glass sand has high requirement on the die material and the sand mold or the sand core is easy to absorb the moisture, and improves the efficiency of the microwave heating hardened water glass sand. The method comprises the steps as follows: a shaping and core preparing step, a heating step, a demoulding step and a secondary heating step. The method has simpleprocess, low cost and good manipulation, can use normal wood die and plastic die, greatly reduces the requirement of the microwave heating on the die material, reduces the adding quantity of the water glass in the casting of water glass sand mold, and greatly improves the collapsibility and reusing performance of the water glass old sand; after demoulding, continuous heating is beneficial for theabsorption ...

Automatic test method and instrument for modules of sodium silicate

The invention provides an automatic test method and instrument for modules of sodium silicate, so as to solve the problems that in the existing measuring method, naked eyes are adopted to judge the titration end point, the measuring precision is low, and the manual operation is adopted, back titration is required to be carried out on sodium hydroxide solution in the measuring process, and the test cycle is longer. In the invention, an electric potential signal collected by a pH electrode is adopted to replace the naked eyes to judge the titration end point, manual liquid-adding titration is replaced by accurate liquid-adding titration carried out by an accurate liquid-adding titration apparatus, a processor is adopted to control the titration process and processing data, and a magnetic force heating stirrer is adopted to heat and stir in the whole measuring process. The instrument in the invention consists of a liquid-adding titration unit, a reaction unit, a signal acquisition amplifying ...

Powdery paint for lost foam casting of cast iron

The invention discloses a special coating for pulverous expendable pattern casting and casting iron, and the special coating comprises 60-70 percent of 180-200 mesh refractory materials, 2.0-3.0 percent of suspending agent, 1.5-2.5 percent of adhesive, 0.3-0.6 percent of organosilicon defoamer, 0.01-0.03 percent of preservative agent and 180-200 mesh residual mica powder in balancing amount. Whenthe special coating is prepared, various pulverous materials are weighed according to the required proportion, interposed into the powder stirrer in sequence to stir for 20 to 40 minutes at a low speed and then discharged and packed. When the coating is used, appropriate water is interposed into the stirred vessel by the powder-to-water ratio of 1 to (1.1-1.4). After the stirred vessel is turned on, the powder coating weighed is interposed in batches. The coating is utilized after preparing into slurry; therefore, the special coating has the advantages of good suspension property, high intensity ...

Method for preparing semi-solid state slurry by pouring channel self-stirring technology and device therefor

The invention discloses a device for preparing semi-solid state slurry by pouring channel self-stirring technology, comprising a sprue cup (1) and a snakelike pouring channel (2) which are communicated with each other, wherein, the snakelike pouring channel (2) is formed by a vertical pouring channel part (2.1), a first arch bent channel (2.2) having buffer action, a second arch bent channel (2.3) having the buffer action, a concave pouring channel bottom nest (2.4) arranged at the bottom of the snakelike pouring channel (2) and an approximately horizontal inner pouring channel (2.5) which are sequentially communicated with each other. The semi-solid state slurry can be prepared by pouring alloy with the degree of superheat being 0-150 DEG C in the device. The obtained semi-solid state slurry has the advantages of fine grain structure, even distribution and low manufacturing cost.

Oil sand regenerating machine

The old sand regeneration equipment comprises cylinder body supported on the spring and vibration motors. The upper portion of the cylinder body is equipped with sand-feeding inlet, and the lower portion of the cylinder body is equipped with sieve plate, the cross-section of the cylinder body is made into the form of regular polygon, and the central shaft of cylinder body is equipped with exhausttube passed through the sieve plate, and the bottom of cylinder body is communicated with pneumatic separation hopper. Two vibration motors are mounted outside of cylinder body symmetrically.

Coating for improving surface precision of layered extrusion molding ceramic, preparation method and treatment method

The invention belongs to the related technical field of rapid casting, and discloses a coating for improving the surface precision of layered extrusion molding ceramic and a preparation and treatment method. The coating comprises 30-50 parts of refractory aggregate, 10-25 parts of a binder, 4-10 parts of a suspending agent and a pore-forming agent, 10-25 parts of a thickening agent and the balance of carrier liquid. The invention also discloses a preparation method of the coating. A method for treating to-be-treated ceramic through the coating comprises the following steps that S1, the surface of the to-be-treated ceramic is coated with the coating through a dip-coating or brush-coating or centrifugal method, and standing and drying are conducted; and S2, integrally roasting the to-be-treated ceramic subjected to the step S1, and cooling to obtain the required high-surface-precision ceramic. According to the invention, the problem that the surface precision of the layered extrusion molded ...

Microwave heating method for water glass sand mold or sand core

The invention provides a microwave hardening method of water glass sand mold or sand core, belonging to the sand mold hardening method in casting industry. The method solves the problems that the existing microwave heating hardened water glass sand has high requirement on the die material and the sand mold or the sand core is easy to absorb the moisture, and improves the efficiency of the microwave heating hardened water glass sand. The method comprises the steps as follows: a shaping and core preparing step, a heating step, a demoulding step and a secondary heating step. The method has simple process, low cost and good manipulation, can use normal wood die and plastic die, greatly reduces the requirement of the microwave heating on the die material, reduces the adding quantity of the water glass in the casting of water glass sand mold, and greatly improves the collapsibility and reusing performance of the water glass old sand; after demoulding, continuous heating is beneficial for the ...

Preparation method of high-toughness casting aluminum alloy

The invention discloses a high-toughness casting aluminum alloy containing the following components in percentage by weight: 9.5-11.0 percent of Mg, 0.1-0.4 percent of Ti, 0.1-0.3 percent of RE, 0.15-0.30 percent of Si and the balance of Al and unavoidable trace impurities, wherein the content of single elements in the trace impurities is less than 0.10 percent, and the total content of the trace impurities is less than 0.50 percent. The invention also discloses a preparation method of the high-toughness casting aluminum alloy. The high-toughness casting aluminum alloy has the advantages of high tensile strength, high elongation, low price of raw materials, short production flow, easy control on the process flow and the like, and complicated smelting equipment and subsequent thermal treatment hot standby are not needed; on the premise of satisfying the mechanical properties of the members, the overall production cost is lower.

Method and device for semi-solid precision rheo-casting of light alloys

The invention discloses a method and device for semi-solid precision rheo-casting of light alloys. A forming cavity of a mould adopts an insert type structure, and a concave mould and a mould insert are respectively divided into a movable part and a fixed part, wherein the movable concave mould and the movable mould insert are connected with a mould clamping cylinder, and can be moved horizontally under the action of the mould clamping cylinder so as to realize the opening and closing of the mould; and the fixed concave mould and the fixed mould insert are connected with an injection system. After a casting is performed by using semi-solid slurry, a semi-solid die-casting is performed by using the injection system, then a press ram drives a forging subplate to carry out casting on the blank of the light alloy, after the completion of the casting, the movable concave mould is drawn out by the mould clamping cylinder, then the finished product is taken out. In the invention, the semi-solid ...

Method for reducing interfacial reaction of titanium aluminum base alloy melt and graphite casting mold

The invention relates to a method for reducing the interfacial reaction of a titanium aluminum base alloy melt and a graphite casting mold, and belongs to a manufacturing method of a titanium aluminum base alloy casting. The method solves the problems that the interfacial reaction of the titanium aluminum base alloy melt and the graphite casting mold is serious and the performance of the titanium aluminum base alloy casting is reduced. According to the method, hydrogen is introduced during the smelting pouring process of titanium aluminum base alloy, the partial pressure of the introduced hydrogen is not lower than 5 kPa, the action time of the hydrogen and the titanium aluminum base alloy melt is not smaller than 2 minutes, and then the obtained titanium aluminum base alloy melt is poured in the graphite casting mold. The method is simple in technology, lower in energy consumption and cost and easy to realize in the production, effectively reduces the interfacial reaction of the titanium ...

Lost foam casting vibration clotting method

Production method for performing full mold casting of spheroidal graphite cast iron by using waste castings

The invention discloses a method for regulating production quality of full mold casting of spheroidal graphite cast iron by using waste castings as main raw materials in a combined method of furnace-front test and calculation and modulation. According to the method, the utilization rate of materials can be increased, the resources are reduced, the spheroidal graphite cast iron with stable quality performance can be produced, and the rate of finished products is improved.

Lost foam wire cutting numerical control machining shaping mill

A vanishing mould digital control linear cutting processing forming machine belongs to automatic machining device, and overcomes the problems of low forming speed and singular function of prior vanishing mould digital control linear cutting processing forming machine. The vanishing mould digital control linear cutting processing forming machine is composed of a mechanical part and a control part.The mechanical part comprises a frame, a tray, an X-axis motor, a Y-axis motor, a Z-axis motor, a X-axis left cylinder slide way, a X-axis right cylinder slide way, a Y-axis cylinder slide way, a Z-axis cylinder slide way, a main shaft motor and the main shaft. The right side of frame is fixed with a bracket. Two ends of Z-direction vertical girder are fixed with an upper cantilever and a lower cantilever. A baiting cutting line is connected between the end of upper cantilever and the end of lower cantilever. An installation plate is installed on the end of main shaft. The installation plate is ...

Special additive for powder coating used in lost form casting

The invention discloses a special powder coating additive for pulverous expendable pattern casting, and the powder additive comprises the following components: suspending agent (15-25 wt%), rheological agent (20-25 wt%), adhesive (35-55 wt%), organosilicon defoamer (4-10 wt%) and preservative agent in balancing amount. When the special additive is prepared, various pulverous materials are weighedby the required proportion, interposed into the powder stirrer in sequence to stir for 20 to 40 minutes at a low speed and then discharged and packed. When the powder coating is prepared by adopting the additive, the powder coating additive is weighed and prepared in the ratio of refractory material and additive of 100 to (6-10). After the low-speed stirred vessel is turned on, the powder coatingweighed is interposed into the stirrer in batches, the stirring time is 10 to 20 minutes, and then the powder coating is discharged and packed. The additive is utilized after the powder coating manufactured ...

High-niobium low-density refractory multi-principal-element alloy and vacuum drip casting method thereof

The invention belongs to the technical field of metal material correlation, and discloses a high-niobium low-density refractory multi-principal-element alloy and a vacuum drip casting method thereof.The multi-principal-element alloy comprises niobium, aluminum, titanium and vanadium, the atomic ratios of niobium, aluminum, titanium and vanadium is 35-45:18.33-21.67:18.33-21.67:18.33-21.67, the phase structure of the multi-principal-element alloy is a single BCC structure, in the elements of the multi-principal-element alloy, the niobium is the main refractory element and achieves the main effect, due to the high niobium content, the alloy has the refractory and high toughness characteristics, the proper aluminum content is beneficial to keeping good inoxidizability and low density, the proper titanium content is beneficial to keeping good inoxidizability and certain toughness, the drip casting method is adopted, and the shortcoming that for a traditional drip casting technology, due to ...

Aluminium alloy or magnesium alloy evaporative-pattern casting compression solidification device

The invention relates to an aluminium alloy or magnesium alloy lost mould casting pressuring solidification method and a device thereof, and the invention belongs to the field of special precision casting. The aluminium alloy or magnesium alloy lost mould casting pressuring solidification method comprises compacting, vacuuming, pouring, pressuring and depressurizing. A pressure resistant sand boxof the device is a cylinder-shaped container, the bottom is provided with an exhaust valve, and the inner lower part or the side wall is provided with a ventilation interlayer; the upper surface of acover of the pressure resistant sand box is respectively provided with a switch valve, a safety valve and a pressure gauge; and the side surface of the pressure resistant sand box or the cover of thepressure resistant sand box is provided with an intake pipe. The aluminium alloy or magnesium alloy lost mould casting pressuring solidification method can obviously reduce casting defects of shrinkage cavity ...

Material for surface composite modification of magnesium alloy made by lost foam casting (LFC) and preparation method thereof

The invention discloses a material for surface composite modification of magnesium alloy. The material comprises the following compositions in percentage by mass: 30 to 50 percent of glass dust (with the melting point between 350 and 500 DEG C), 10 to 15 percent of metal powder, 0.4 to 0.6 percent of defoaming agent, 2.0 to 4.0 percent of caking agent, and the balance of water, wherein the glass dust is one of borate glass, phosphate glass and lead-zinc glass; the metal powder is at least one of aluminum powder and zinc powder; the defoaming agent is one of polydimethylsiloxane, polyoxyethylene polyoxypropylene ether and polyoxypropylene glycerol ether; and the caking agent is one of polyvinyl alcohol and sodium carboxymethyl cellulose. The prepared material is coated on a foamy surface to form an alloying layer and a ceramic layer synchronously during magnesium alloy casting; moreover, the compositions of the surface layer of a cast product is in ladderlike distribution from the outside ...

Preparation method and device of semi-solid slurry

The invention discloses a preparation method and a device of semi-solid slurry. Three processes of air current stirring, electromagnetic vibration and addition of heterogeneous nucleating agents are comprehensively utilized by the method. A graphite head with holes is connected with a hollow stirring rod, and a rotating motor drives the stirring rod to rotate through gear transmission and drives the graphite head to rotate; gas passes through a sleeve barrel and reaches the graphite head through the hollow stirring rod, and then, the gas overflows out of small holes, thereby realizing the purposes of blowing and stirring the molten metal in a rotating way; an electromagnetic vibration table can realize electromagnetic vibration on the molten metal in a crucible; the heterogeneous nucleating agents are added into the molten metal to promote further spheroidization and refinement of slurry tissues; after the molten metal is smelted, the graphite head is inserted into the molten metal for ...

Methylene blue adsorption testing method of bentonite

The invention relates to a methylene blue adsorption testing method of bentonite, which belongs to the field of methods for testing components of clay sand casting material, and solves the problems that a traditional detection method is quite complicated to operate, has lower determination precision, may titrate repeatedly and causes longer testing process. The testing method sequentially comprises a sample solution treatment step, a mixed solution forming step, a quantitative reagent shifting step, a drop spot image acquisition step and an image processing step. Aiming at bentonite methylene blue adsorption testing on a casting production line and the effective bentonite content determination in clay sand, the methylene blue adsorption testing method of bentonite can be realized on a computer, artificially and manually inputs an initial titration value, fully automatically sets and works, automatically acquires drop spot images and judges the final titration destination, can automatically ...

Vermiculizer for thin-wall cast iron and melting method thereof

The invention discloses a vermiculizer for thin-wall cast iron and a melting method thereof, and relates to a cast iron vermiculizer. The melting of the vermiculizer comprises the following steps: 1, examining before smelting; 2, charging before opening a furnace and transmitting power; 3, smelting and charging; 4, discharging from the furnace and casting; 5, crushing; and 6, checking, identifying and storing, wherein the obtained vermiculizer comprises 15 to 25 percent of rare earth (RE), 35 to 45 percent of silicon (Si), 2.5 to 4.5 percent of magnesium (Mg), 2 to 4 percent of calcium (Ca), 1.5 to 3.5 percent of zinc (Zn), 0.6 to 1.4 percent of magnesium oxide (MgO) and 20 to 40 percent of balance of ferrum (Fe) or inevitable impurity. The vermiculizer has the advantages of relatively simple and stable vermiculizing treatment process, good dissolubility, relatively wide vermiculizing range, no stirring, no desulphurization treatment for raw melted iron, and suitability for producing the ...

High-entropy alloy particle-reinforced aluminum-based composite material and preparation method thereof

The invention discloses a high-entropy alloy particle-reinforced aluminum-based composite material and a preparation method thereof, and belongs to the field of preparation of composite materials. The problems of influence on material densification and difficulty in the simultaneous improvement of strength and plasticity of the composite material due to own brittleness of a conventional metal-based reinforcement phase and limitation to sintering temperature are solved. The aluminum-based composite material is formed by the ball-milling mixing and sintering forming of a matrix phase and a reinforcement phase, wherein the volume ratio of the matrix phase aluminum and the reinforcement phase high-entropy alloy particles AlCoCrFeNiTi0.5 is 1: 4 to 1: 9. The preparation method for the high-entropy alloy particle-reinforced aluminum-based composite material comprises a step of preparing a high-entropy alloy ingot, a step of preparing high-entropy alloy powder, a step of preparing composite powder ...

Aluminium alloy or magnesium alloy evaporative-pattern casting compression solidification method and device thereof

The invention relates to an aluminium alloy or magnesium alloy lost mould casting pressuring solidification method and a device thereof, and the invention belongs to the field of special precision casting. The aluminium alloy or magnesium alloy lost mould casting pressuring solidification method comprises compacting, vacuuming, pouring, pressuring and depressurizing. A pressure resistant sand box of the device is a cylinder-shaped container, the bottom is provided with an exhaust valve, and the inner lower part or the side wall is provided with a ventilation interlayer; the upper surface of a cover of the pressure resistant sand box is respectively provided with a switch valve, a safety valve and a pressure gauge; and the side surface of the pressure resistant sand box or the cover of the pressure resistant sand box is provided with an intake pipe. The aluminium alloy or magnesium alloy lost mould casting pressuring solidification method can obviously reduce casting defects of shrinkage ...

Antigravitational vacuum method and apparatus for asting Mg allor or Al alloy with lost mould

An antigravitational casting technology includes putting a lost mould in a bottom running type sand box, adding sand, vibration compacting, loading molten MgAl alloy in filler while introducing protecting gas, introducing the pressure controllable inertial gas to the filler, and pouring the molten alloy into said sand box to gasify said list mould. Its apparatus is composed of filler, sand box, pouring pipe, crucible in the filler, and heating coil surrounding said pouring pipe. It is suitable for precision casting.

Special-purpose additive for powder paint for lost foam casting

The invention discloses a special powder coating additive for pulverous expendable pattern casting, and the powder additive comprises the following components: suspending agent (15-25 wt%), rheological agent (20-25 wt%), adhesive (35-55 wt%), organosilicon defoamer (4-10 wt%) and preservative agent in balancing amount. When the special additive is prepared, various pulverous materials are weighed by the required proportion, interposed into the powder stirrer in sequence to stir for 20 to 40 minutes at a low speed and then discharged and packed. When the powder coating is prepared by adopting the additive, the powder coating additive is weighed and prepared in the ratio of refractory material and additive of 100 to (6-10). After the low-speed stirred vessel is turned on, the powder coating weighed is interposed into the stirrer in batches, the stirring time is 10 to 20 minutes, and then the powder coating is discharged and packed. The additive is utilized after the powder coating manufactured ...

Ti or TiAl alloy casting and solidification structure refining method thereof

The invention belongs to the field of solidification structure regulation and control, and particularly discloses a Ti or TiAl alloy casting and a solidification structure refining method thereof.The method comprises the steps that alloy raw materials are put into a smelting furnace crucible, the alloy raw materials are smelted under the high-purity argon condition, continuous stirring is conducted in the smelting process, and alloy melt with uniform components is obtained; the alloy is Ti or TiAl alloy; pouring the alloy melt into a horizontal mechanical vibration casting mold, and applying vibration until the melt is completely solidified under the conditions of ensuring the air tightness of a vacuum chamber and relatively small vibration loss, so as to obtain an alloy casting; the amplitude of horizontal mechanical vibration is 1-5 mm, and the vibration frequency is 5-50 Hz. According to the method, columnar crystal-isometric crystal transformation and grain refinement are achieved through ...