Method of producing the copper alloy contact wire

The invention provides copper alloy contact lines and a preparation method thereof. The method includes the following steps: (1) preparing Cu-Al master alloy powders, in which the content of Al is 0.21-0.53wt%, and the balance is copper; (2) using the Cu-Al master alloy powders obtained from step (1) to prepare an oxygen source of Al2O3-Cu2O, in which the weight ratio of Cu and AI keeps unchanged; (3) mixing the Cu-Al master alloy powders obtained from step (1) and the oxygen source of Al2O3-Cu2O obtained in step(2), wherein, the weight ratio of the oxygen source of Al2O3-Cu2O in the mixture is 10-25wt%; (4) carrying out internal oxidation and reduction treatment for the mixture obtained in step (3), so as to obtain alloy powders of Cu-Al2O3, in which the content of Al2O3 is 0.4-1.0wt%; (5) suppressing the alloy powders of Cu-Al2O3 obtained in step (4) into billets and then carrying out sintering treatment; (6) molding the suppressed and sintered billets obtained in step (5) into bars; ...

Variable-speed-input constant-speed-output device for adjusting guide-vane-adjustable torque converter

Disclosed is a variable-speed-input constant-speed-output device for adjusting a guide-vane-adjustable torque converter. A primary planet gear system is formed by a primary tie bar, a primary planet gear shaft, a pair of primary planet gear bearings, a primary planet gear, a primary inner gear ring and a primary central wheel. A secondary planet gear system is formed by a secondary inner gear ring, a secondary planet gear, a pair of secondary planet gear bearings, a secondary planet gear shaft and a secondary central gear. The secondary planet gear shaft is fixed onto a box body to form a constant-proportion gear system. The primary inner gear ring and the secondary inner gear ring are connected into a whole and are supported against the box body through the bearings. An input shaft is connected with the primary tie bar, one end of the input shaft is supported against the box body and the other end of the input shaft forms mutual support with a pump wheel connecting shaft of the torque ...

Environment-friendly heat treatment process for large shaft forgings

The invention discloses an environment-friendly heat treatment process for large shaft forgings. According to the heat treatment process, the traditional oil and tap water are substituted by a commercial water soluble quenching medium PAG (poly alkylene glycol) or BW, the concentration of the quenching medium PAG or BW is adjusted, and the process parameters such as the heating speed, holding time, quenching temperature, quenching time, tempering temperature, cooling speed and the like are strictly controlled, thereby solving the problems of deformation and even defects liable to occur by water cooling of large shaft parts and lower rigidity, environmental pollution and the like liable to occur by oil cooling of large shaft parts, and simultaneously solving the problems of heavy weight, great change of sectional dimension, uneven performance after heat treatment and the like of large shaft parts.

Method and device for measuring pressure distribution

The invention discloses a method and device for measuring pressure distribution. A movable rod is arranged in a container filled with liquid to be measured, and the perpendicular line of the center line of the container is used as a rotating shaft to drive the container to rotate at a set angular speed; the distance from the movable rod to the rotating shaft is collected; based on the distance, the initial density of the liquid to be measured and the width and the quality of the movable rod, the pressure of the liquid to be measured caused by inertial centrifugal force is calculated. The device can quantitatively measure pressure distribution inside the rotating liquid. In addition, the method and device are simple in operation, and demonstrative experiments can be vividly performed; the device for measuring pressure distribution can be used as an experimental instrument or basic experimental equipment in the correlation research field.

Method and device for detecting intensity of magnetic field

The invention provides a method and device for detecting intensity of a magnetic field. The device for detecting the intensity of the magnetic field comprises a Hall sensing circuit, an amplifier, a displacement sensor and an LED dot matrix. The Hall sensing circuit comprises a Hall device and a direct current power supply. The Hall device is utilized to measure the magnetic field, when being electrified by a constant current, the Hall device can sense a Hall voltage in the magnetic field, and the magnitude of the Hall voltage is in direct proportion to the intensity of the magnetic field where the Hall device is located. The Hall voltage is amplified to drive the LED dot matrix to display the measured result, and due to different drive voltages and different LED light emitting effects, the different light emitting effects of the visual LED dot matrix can be utilized to indicate the intensity of the current magnetic field. In addition, a display screen can be utilized to directly output ...

Advanced treatment method for urban middle water as industrial recirculated cooling water

Distribution network planning and monitoring system

The invention discloses a distribution network planning and monitoring system comprising n distribution subnets and a power distribution station. The distribution subnets are distributed on different areas of the city. The power distribution station is arranged among a power transmission network and the distribution subnets. The power distribution station distributes certain powers to each distribution subnets in advance. If power consumption of the first distribution subnet at the period A in that day excesses average power consumption of the first distribution subnet in that day, and power consumption of the second distribution subnet at the period A in that day is lower than average power consumption of the second distribution subnet in that day, the power distribution station distributes part power of the second distribution subnet to the first distribution subnet from the beginning of the period A till the end of the period A of the next day. By the use of the distribution network ...

Double-action hydraulic machine

The invention relates to a double-action hydraulic machine. The double-action hydraulic machine comprises a rack provided with an upper beam. An inner-side hydraulic cylinder and an outer-side hydraulic cylinder which are vertically arranged are fixedly arranged on the upper beam. The inner-side hydraulic cylinder is provided with a first piston used for being in transmission connection with an inner-side forming die, and the outer-side hydraulic cylinder is provided with a second piston used for being in transmission connection with an outer-side forming die, wherein the inner-side forming die is sleeved with the outer-side forming die. The double-action hydraulic machine can reduce the manufacturing cost of complex-shaped or large-scale metal parts.

Semi-solid slurrying device and composite board manufacturing device using semi-solid slurrying device

The invention relates to the technical field of semi-solid slurrying, in particular to a semi-solid slurrying device and a composite board manufacturing device using the semi-solid slurrying device. The semi-solid slurrying device comprises a runner communicated with a liquid storage tank, obliquely arranged from top to bottom and used for molten metal to flow through, wherein the runner is provided with the contact surface in contact with the molten metal, strip-shaped protrusions parallelly distributed from top to bottom are arranged on the contact surface, grooves are formed among adjacent strip-shaped protrusions, the length directions of the strip-shaped protrusions are perpendicular to the flowing direction of the molten metal. By adopting the semi-solid slurrying device, the kish problem of the contact surface of the runner is greatly solved, high-quality semi-solid slurry produced by the semi-solid slurrying device can form metallurgical bonding with a solid heterogeneous material ...

Rare earth-containing copper base alloy material and preparation method thereof

The invention discloses a high-performance copper base alloy material containing rare earth. The copper base alloy material contains 0.02wt percent to 0.15wt percent of rare earth, 0.9wt percent to 4.0wt percent of nickel, 0.2wt percent to 1.0wt percent of silicon, 0.01wt percent to 0.15wt percent of zirconium, and copper and unavoidable impurities as the rest. The preparation method of the copper base alloy material comprises the following steps of smelting, hot forging, solid solution and succeeding progressive aging. The temperature for the solid solution is 850 DEG C to 960 DEG C and maintained for 1h to 2h; and the temperature for the aging is 400 DEG C to 500 DEG C and maintained for 2h to 6h. Simultaneously, two or more times of the aging treatment can be carried out to the alloy according to the need of comprehensive performance. The tensile strength of finished products obtained by the invention can reach 600MPa to 900MPa, the electric conductivity can reach 45 percent to 75 percent ...

Preparation method of high-strength silver-copper alloy material

The invention discloses a preparation method of a high-strength silver-copper alloy material. The method comprises the following steps: 1) taking copper and silver as raw materials, and burdening according to the ratio of 15-20wt% of silver and the balance of copper; 2) preparing a silver-copper alloy bar by adopting a vacuum smelting technology; 3) refining the silver-copper alloy bar by adopting a vacuum consumable arc smelting technology; 4) hot extrusion, wherein the extrusion temperature is 800-900 DEG C; the heat preservation time is 2-4 hours; the extrusion ratio is 8-10, and extruding into the bar; 5) thermal treatment, wherein the annealing temperature is 200-250 DEG C; the heat preservation time is 1-2 hours, cooling along with a furnace; 6) drawing to obtain the high-strength silver-copper alloy material. A silver-copper alloy ingot is refined from the copper and the silver as raw materials in a vacuum consumable smelting furnace; the high-strength silver-copper alloy is obtained ...

Preparing method for non-online solid solution of copper alloy slab band

The present invention discloses a preparing method for non-online solid solution of copper alloy slab band, wherein the constituents of the copper alloy comprises 0.4-1.1wt% of Cr, less than or identical to 0.1% of Fe, less than or identical to 0.05% of Ni, and the rest is Cu. The preparing process comprises: 1, thermal deformation of copper alloy; 2, treatment of solid solution; 3, secondary thermal deformation; 4, cold rolling deformation; 5, ageing treatment; and 6, precision rolling to obtain products. The present invention has the advantages that the production is low, and the method is suitable for medium and small batch production; the fit of hardness and electric conductivity is good; blanks before the solid solution treatment of alloy are shorter and thicker than the blanks before the solid solution treatment of traditional process, so the solid solution treatment is operated easily; after a secondary forging, water is cold, the alloy element Cr is dissolved into copper matrix ...

Copper alloy contact wire and method of producing the same

城市中水作为工业循环冷却水的深度处理方法

The invention discloses a deep processing method of urban recycled water by using it as industrial cycling cooling water comprising the steps of, the urban recycled water being collected and entering the recycled water pool, then entering pressure type mixer, entering into clarification tank, liming by wet method for softening, condensation, settlement and automatic de-sludging, the output water flowing into the circular double chamber filter, then entering clean water tank through pressure type mixer, the clean water being pumped to the cycling water pump discharge pressure tube after the compensator to be used for re-circulated cooling water system.

Forming method for shaft component with flange

The invention relates to a forming method for a shaft component with a flange. The forming method comprises a first step of selecting a rod-shaped blank, wherein the diameter of the rod-shaped blank is larger than that of the rod section of the shaft component and is smaller than that of the flange of the shaft component; and a second step including the following forms: a first form comprising the steps of extruding one end of the rod-shaped blank through an extrusion mold so as to form the rod section of the shaft component from the rod-shaped blank, then upsetting the other end of the rod-shaped blank through an upsetting mold so as to form the flange of the shaft component from the rod-shaped blank; and a second form comprising the steps of upsetting one end of the rod-shaped blank through the upsetting mold so as to form the flange of the shaft component from the rod-shaped blank, and then extruding the other end of the rod-shaped blank through the extrusion mold so as to form the rod ...

Cardiac ultrasound probe accessory

The invention relates to a cardiac ultrasound probe accessory which comprises a housing used for containing the lower half portion of a cardiac ultrasound probe, a universal adjusting probe supporting structure used for fixing the cardiac ultrasound probe is installed at the upper end of the housing, and the cardiac ultrasound probe installed on the universal adjusting probe supporting structure can move up and down, rotate in the circumferential direction and swing in the universal direction. The lower end of the cover shell is connected with a negative pressure suction ring used for making contact with the body surface, a skin-friendly film is arranged between the upper end of the negative pressure suction ring and the lower end of the cover shell, and a space defined by the negative pressure suction ring and the skin-friendly film is connected with a negative pressure generating device through a negative pressure passage. When in use, the device is connected with the cardiac ultrasonography ...

Dynamically encrypting and unlock method based on electronic trick lock

The invention provides a dynamic encryption and unlocking method based on an electronic coded lock. A coded lock system thereof consists of a dynamic code generator and an electronic coded lock control system. The code generator can generate dynamic codes by adopting the multi-code table encryption algorithm and taking the time as parameters. When a user unlocks, both a customized static code anda dynamic code must be input. The coded lock control system decides whether to unlock depending on the correctness of the input codes. The dynamic code based on the parameters of time is just effective and disposable within a given time, so as to be high in security. The coded lock control system gets the clock information of the code generator through the dynamic code, and compares the clock information with the system clock of the coded lock, thus synchronizing the two clocks through the analysis and the compensation of the deviations of the clocks, and ensuring the overall system to run reliably ...

Ultra-high tension copper wire and method of producing the same

The invention provides copper wires with super high tension and a preparation method thereof, wherein, the method includes the following steps: (1) preparing Cu-AI master alloy bars with the AI content of 0.1-0.63wt%; (2) carrying out cold rolling treatment for the Cu-AI master alloy bars; (3) drawing the Cu-AI master alloy bars to obtain Cu-Ai alloy wires with a stated diameter; (4) carrying out internal oxidation treatment for the Cu-AI alloy wires to obtain alloy wires of Cu-Al2O3 with the basic content of Al2O3 as 0.2-1.2wt%; (5) drawing the alloy wires of Cu-Al2O3 to obtain the copper wires with super high tension having a required diameter. The copper wires with super high tension prepared by the method have good conductivity as well as high tensile strength and softening temperature. Thus the copper wires are applicable for advanced digital communications devices, high fidelity wires and voice coils, and water cooling copper wires or connectors used in ultra-high magnetic fields.

Cutting mechanism and tunneling machine

The invention discloses a cutting mechanism and a tunneling machine. The cutting mechanism comprises a cutting head and a cantilever, and further comprises a first sealing mechanism arranged between the tail of the cutting head and the cantilever. The first sealing mechanism comprises a pressing cover, a first sealing ring, a spacing ring and a second sealing ring sequentially from outside to inside in the axial direction of the cutting head. The pressing cover is detachably connected with the cutting head. A first grease storage cavity is formed between the pressing cover and the cantilever. A second grease storage cavity is formed between the spacing ring and the cantilever. A first grease inlet channel, a grease discharge channel and a second grease inlet channel are formed in the cylinder wall of the cantilever. The first end of the first grease inlet channel is communicated with the first grease storage cavity, and the second end of the first grease inlet channel is communicated with ...

Bi base high-temperature leadless soft solder

The invention relates to a Bi-based high-temperature lead-free soft solder and a preparation method, which belong to the soldering technology for encapsulation. The material components of the Bi-based high-temperature lead-free soft solder include: 80 to 90wt percent of Bi, 2 to 8wt percent of Sb as well as 2 to 12wt percent of Sn; the prescription components also comprise at least one from mixedrare earth lanthanum and neodymium with the content of 0.05 to 1.5wt percent. The melting point of the Bi-based high-temperature lead-free soft solder is between 250 and 450 DEG C; besides, the Bi-based high temperature lead-free soft solder has the advantage of good spreading and wetting performance, high intensity and good corrosion resistance; the Bi-based high-temperature lead-free soft solder can adapt the demands of various technologies, environments and artificial factors in the electron industry which is continuously developed.

Upper die and die using same

The invention relates to an upper die and a die using the same. The die comprises the upper die and a lower die, wherein the upper die and the lower die are used cooperatively. The upper die comprises a fixing portion and a work portion, wherein the fixing portion and the work portion are split. The work portion is hung at the lower end of the fixing portion through a hanging structure. The hanging structure comprises a shaft hole and a shaft, wherein the axis of the shaft hole extends in the vertical direction, and the shaft is inserted in the shaft hole. The shaft and the shaft hole are provided with an internal key groove and an external key groove respectively, wherein the internal key groove and the external key groove are communicated with each other, and the opening of the internal key groove and the opening of the external key groove are opposite. Key blocks preventing the shaft from being separated from the shaft hole in the vertical direction are respectively inserted in the internal ...

Manual transmission's cable and manual transmission

The utility model discloses a manual transmission's cable relates to the automotive transmission field, the cable includes that cable lock core and cover establish the outer outer tube of cable lock core, the cable lock core can slide in the outer tube, the outer tube still is provided with magnet outward, and its magnetic force can see through the outer tube is used in on the cable lock core. Theutility model discloses a manual transmission's cable can reduce the frictional force between cable lock core and the outer tube effectively and can restrain the vibration of cable to improve selection, the performance of shifting.

Preparation method of copper-zinc composite plates and mold for achieving same

The invention discloses a preparation method of copper-zinc composite plates and a mold for achieving the same. The preparation method comprises the following steps of 1) heating surface-finished copper plates and performing heat preservation on the copper plates for standby; 2) smelting zinc ingots inside a smelting furnace to obtain liquid zinc; 3) putting the heat-preserved copper plates into the preheated mold, pouring the liquid zinc on the upper surface of the copper plates, performing pressurization rapidly until reaching a pressure of 800-1500 MPa, performing pressure maintaining for 1-2 minutes, and then performing demoulding and air cooling to obtain the copper-zinc composite plates. According to the preparation method of the copper-zinc composite plates, the liquid zinc is poured onto the preheated copper plates, pressurization is performed rapidly to achieve one-step solid-liquid composition, further the liquid zinc solidifies under pressure, so that mutual diffusion of copper ...

Graphite sleeve for horizontal continuous casting crystallizer and preparation method thereof

The invention discloses a graphite sleeve for a horizontal continuous casting crystallizer and a preparation method thereof. The graphite sleeve comprises the following raw materials by mass percent: 10 to 20 percent of short carbon fiber and the balance of high-purity graphite powder, wherein the short carbon fiber is 3 to 5 Mum in diameter, 5 to 10 mm in length, 2400 MPa in intensity and 350 GPa in modulus. The invention provides the graphite sleeve for the horizontal continuous casting crystallizer, by adding the short carbon fiber into the conventional high-purity graphite powder, the tensile strength, the wearing resistance and the service life of the graphite sleeve can be improved remarkably, and the problem of short service life of the graphite sleeve for the horizontal continuous casting crystallizer, which is prepared by adopting high-purity graphite powder, can be overcome. Experimental results show that the tensile strength, the wearing resistance and the service life of the ...

Experiment device for measuring Planck constant

The invention provides a novel experiment device for measuring the Planck constant. The experiment device comprises a fluorescence screen (1), a collimator (2), a photoelectric tube (3), a filter sheet (4), a diaphragm (5), magnetic field generators (6, 7), a diffraction grating (8) and a light source (9). According to the physical experiment device for measuring the Planck constant, the Planck constant is determined by measuring the maximum initial kinetic energy of electrons emitted by the photoelectric tube and affection by dark currents is avoided. By means of the physical experiment device for measuring the Planck constant, the diameter of circling motion of the electrons in a magnetic field and the momentums or the kinetic energy of the electrons can be directly read from the fluorescence screen more conveniently and more visually.

Dynamically encrypting and unlock method based on electronic trick lock

The invention provides a dynamic encryption and unlocking method based on an electronic coded lock. A coded lock system thereof consists of a dynamic code generator and an electronic coded lock control system. The code generator can generate dynamic codes by adopting the multi-code table encryption algorithm and taking the time as parameters. When a user unlocks, both a customized static code and a dynamic code must be input. The coded lock control system decides whether to unlock depending on the correctness of the input codes. The dynamic code based on the parameters of time is just effective and disposable within a given time, so as to be high in security. The coded lock control system gets the clock information of the code generator through the dynamic code, and compares the clock information with the system clock of the coded lock, thus synchronizing the two clocks through the analysis and the compensation of the deviations of the clocks, and ensuring the overall system to run reliably ...

Rotating mechanism for distribution network hot-line work wire stripping tool, wire stripping tool and method

The invention belongs to the technical field of electric power engineering, and provides a rotating mechanism for a distribution network hot-line work wire stripping tool, the wire stripping tool and a method. A main gear is arranged on an output shaft of a driving motor through a clutch mechanism; the switching of power transmission separation and combination between the output shaft of the driving motor and the main gear is realized; when a power-down fault occurs or work is completed, after power transmission between the output shaft of the driving motor and the main gear is separated through the clutch mechanism, an operator can easily rotate the incomplete gear ring through the operating rod, the incomplete gear ring can be rotated into the rotating support, the wire stripping tool can be smoothly taken down from a cable, and the working efficiency is improved. The problem that the wire stripping tool cannot be taken down when the incomplete gear ring is located at the position of ...

A emergent remote control unit of intelligence for brucker survival capsule on water

The utility model relates to an emergent remote control unit of intelligence for brucker survival capsule on water, including waterproof case, set up power supply unit, intelligent control unit, remote terminal in waterproof case to and power impels the unit, the power supply unit includes the lithium cell, intelligent control unit includes main control unit, orientation module, counts biography receiver, electronic governor, remote controller receiver, power advances the unit to include orientation steering wheel, brushless motor, impeller propeller. The utility model discloses a remote terminal carries out remote control, according to remote control command, with the life buoy fast, propelling movement to assigned position accurately, have electrical propulsion power, pull, the functionof remote control, location, the function is comprehensive, and is easy and simple to handle, the accuracy is high, the rescue flexibility is strong, can improve emergency rescue's the efficiency of suing ...

Equipment state synchronization method and device and electronic equipment

The embodiment of the invention provides an equipment state synchronization method and device and electronic equipment, and relates to the technical field of computers. According to the specific implementation scheme, when heartbeat data sent by machine equipment is received, the heartbeat data is analyzed to obtain an equipment state, and the equipment state serves as a first state; wherein the heartbeat data comprises an equipment state, detected by the machine equipment, of the machine equipment; obtaining an equipment state of the machine equipment displayed in the central control equipment as a second state; and if there is a difference between the first state and the second state, synchronizing the device state of the machine device and the device state displayed in the central control device. Visibly, through the scheme, the problem that the synchronization efficiency is relatively low due to the fact that the equipment state is synchronized in a manual mode in related technologies ...

Short-flow preparation method of Cu-Cr-Zr alloy strip

The invention discloses a short-flow preparation method of a Cu-Cr-Zr alloy strip. The method comprises the following steps: 1) blank heating, namely heating and insulating a Cu-Cr-Zr alloy blank to obtain a high-temperature blank; and 2) synchronous extrusion and solution treatment, namely extruding the high-temperature blank and putting the extruded blank in water for water seal solution treatment, thereby obtaining the Cu-Cr-Zr alloy strip. The short-flow preparation method of the Cu-Cr-Zr alloy strip comprises the following steps: carrying out synchronous extrusion and solution treatment on the heated Cu-Cr-Zr alloy strip; and after solution treatment, directly carrying out subsequent cold deformation, so that the process flow is greatly shortened, the production cost is greatly lowered and the labor efficiency is greatly improved, and meanwhile, the problem that solution treatment is hardly carried out for the Cu-Cr-Zr alloy strip is solved. The obtained Cu-Cr-Zr alloy strip has excellent ...

Ultra-high tension copper wire and method of producing the same

Heading machine matched dust removal system

The invention discloses a heading machine matched dust removal system which comprises a press-in fan, a positive pressure air duct, a dust collection hood, a dust collection channel, a dust removal fan and an air volume shunting device, wherein the positive air duct comprises a first duct section and a second duct section; the air volume shunting device is arranged in a range of 50m away from the working face of the heading machine in using condition; a positive pressure air inlet channel, a positive pressure air outlet channel and a shunting air outlet channel, which are communicated with each other, are formed on the air volume shunting device; an adjustment component which is used for adjusting the air volume of the positive pressure air outlet channel is also arranged; the first end of the first duct section is connected with the press-in fan while the second end of the first duct section is connected with the positive pressure air inlet channel; the first end of the second duct section ...

Male die and die using same

The invention relates to a male die and a die using the same. The die comprises the male die and a female die matched with the male die for use, the male die comprises a fixed part and a work part which are arranged in a split mode, the work part is hung at the lower end of the fixed part through a hanging structure, the hanging structure comprises a dovetail groove and a dovetail protrusion matched with the dovetail groove for use, the maximum width of the dovetail protrusion is smaller than the opening width of the dovetail groove, the dovetail protrusion is inserted into the dovetail groove, and a separation-preventing block preventing the dovetail protrusion from being separated from the dovetail groove in the vertical direction is inserted in a gap between the dovetail protrusion and the dovetail grove in the extending direction of the dovetail groove. The male die is low in manufacturing cost.

Manufacturing method of eccentric contact seat

A method of manufacturing an eccentric contact seat having a seat head and a shaft portion extending from the seat head, the shaft portion including a first section proximate the seat head and not eccentric, a second section remote from the seat head and eccentric, and a transition between the first and second sections, where the first and second sections have the same diameter, the method comprises the following steps: providing a round bar blank with the diameter corresponding to the diameter of a first section of the shaft part of the eccentric contact seat; forming the round bar blank into a first middle bar with one end in a free forming ball table shape through a first die pressing procedure; forming the first middle bar into a second middle bar with a finished seat head shape at one end through a second die pressing procedure; and the shaft part of the second middle bar is extruded through a third die pressing procedure, so that an eccentric contact seat finished product with a non-eccentric ...

Preparation method of copper-zinc composite plates and strips

The invention discloses a preparation method of copper-zinc composite plates and strips. The method comprises the following steps of 1) removing surface impurities of zinc ingots and then smelting the zinc ingots at 420-480 DEG C to obtain liquid zinc; 2) manufacturing the liquid zinc obtained in the step 1) into semi-solid slurry; 3) pouring the slurry obtained in the step 2) onto preheated copper plates and then performing rolling to obtain the copper-zinc composite plates and strips. According to the preparation method of the copper-zinc composite plates and strips, firstly, the liquid zinc is made into the semi-solid slurry and then metallurgically composited with solid copper under pressure, the bonding interface layer is relatively thin and thinner than 10 mu m, so that the problems of low strength of composite plates and large thickness of the bonding interface layers due to the preparation process of directly compositing the liquid zinc with the copper plates can be solved, the ...

Power distribution network planning analysis and auxiliary decision-making system

The invention relates to the field of power distribution network planning, and especially relates to a power distribution network planning analysis and auxiliary decision-making system. The system is characterized by comprising a data input and output mode for storing data of a power distribution network planning scheme and the result of a topology analysis in a data file; a power supply reliability index generation module for calculating the reliability index of a power distribution network according to the types of set faults of equipment attributes in the data file; a power supply quality index generation module for calculating a power supply quality index of the power distribution network according to the equipment attributes in the data file; an expected accident analysis module for analyzing various conditions in which accidents may occur and transmitting an analysis result to a feedback module which transmits the analysis result to a self-check module through signals; and a recording ...

Environmentally-friendly water-soluble quenching medium

The invention discloses an environmentally-friendly water-soluble quenching medium which is characterized by comprising the following components in percentage by weight: 0.5-20 percent of water-soluble polyether with the molecular weight of 20000-30000, 0.5-30 percent of water-soluble polyether with the molecular weight of 5000-15000, 0.5-1.5 percent of rust resistant agent, 0.1-0.2 percent of defoaming agent, 300-800ppm of bactericide, 200-500ppm of surfactant, 0.1-5 percent of pH adjusting agent and the balance of water. The environmentally-friendly water-soluble quenching medium is suitable for thermally treating large-sized casting and forging pieces, can be used for adjusting the average molecular weight of a polyether mixture according to the requirement and for properly adjusting the heat resistance and the viscosity of the water-soluble quenching medium; and the quenching and cooling speed can be adjusted by adjusting the concentration of the water-soluble quenching medium so that ...

Extrusion moulding method for parts with inner flanges and outer flanges and extrusion mould

The invention relates to an extrusion moulding method for parts with inner flanges and outer flanges and an extrusion mould. The extrusion moulding method of the parts comprises the following steps: 1, placing a blank material in a female die, wherein the extrusion mould comprises an internal male die and an external male die sleeved on the periphery of the internal male die, a step shaft structure is arranged at the lower end of the internal male die, an annular moulding gap is formed between the external male die and the internal male die; 2, driving the internal male die to downwards move for extruding the blank material through a first loading mechanism which is in transmission connection with the internal male die, extruding an inner hole, enabling a step surface of a step shaft structure at the lower end of the internal male die to be supported against the blank material to keep stable, driving the external male die to downwards move to extrude the blank material through a second ...

Extrusion moulding method for shaft parts with flanges, and special extrusion mould

The invention relates to an extrusion moulding method for shaft parts with flanges, and a special extrusion mould. The adopted extrusion moulding method comprises the following steps: 1, placing a blank material in a female die, wherein the extrusion moulding mould comprises an external male die with a center hole extending along the axial direction, an internal male die is arranged in the center hole of the external male die in a penetrating manner, the hole wall of the center hole of the external male die is matched with the peripheral wall of the internal male die in a guiding sliding manner, a corresponding power output shaft of a press drives the external male die to extrude the blank material and downwards moves to reach the thickness of the flange of the required part; 2, ejecting the external male die to be kept stable on the blank material, wherein the press and a power output shaft which is in transmission connection with the corresponding internal male die drive the internal ...

Rare earth-containing copper base alloy material and preparation method thereof

The invention discloses a high-performance copper base alloy material containing rare earth. The copper base alloy material contains 0.02wt percent to 0.15wt percent of rare earth, 0.9wt percent to 4.0wt percent of nickel, 0.2wt percent to 1.0wt percent of silicon, 0.01wt percent to 0.15wt percent of zirconium, and copper and unavoidable impurities as the rest. The preparation method of the copper base alloy material comprises the following steps of smelting, hot forging, solid solution and succeeding progressive aging. The temperature for the solid solution is 850 DEG C to 960 DEG C and maintained for 1h to 2h; and the temperature for the aging is 400 DEG C to 500 DEG C and maintained for 2h to 6h. Simultaneously, two or more times of the aging treatment can be carried out to the alloy according to the need of comprehensive performance. The tensile strength of finished products obtained by the invention can reach 600MPa to 900MPa, the electric conductivity can reach 45 percent to 75 percent ...