Ball-milling layer-by-layer adhesion coating method for gradient coating on surface of hub

The invention discloses a ball-milling layer-by-layer adhesion coating method for a hub surface gradient coating, which comprises the following steps of: fixing an aluminum alloy hub in a ball-milling tank, sequentially adding mixed powder of AlxFeNiSiTi high-entropy alloy and 6061 aluminum alloy with different volume fraction ratios in different time periods in the ball-milling tank, fastening and sealing a stainless steel tank, vacuumizing, introducing high-purity argon, and carrying out ball-milling and layer-by-layer adhesion coating on the surface of the aluminum alloy hub. The mixed powder is gradually and uniformly mixed under the impact action between the stainless steel tank and the stainless steel grinding balls, is subjected to cold welding under the impact action between the stainless steel grinding balls and the surface of the hub in the ball milling process, and is adhered to the surface of the aluminum alloy hub layer by layer; gradient composite surface layers with different ...

Preparation method of fiber-reinforced aluminum-based composite material coating compounded on surface of hub

The invention discloses a preparation method of a fiber-reinforced aluminum-based composite material coating compounded on the surface of a hub, which comprises the following steps of: conveying molten alloy to a coating device by adopting a screw feeding device, coating the molten alloy on a carbon fiber net by using a metal brush coating device, and coating the carbon fiber net with the molten alloy under the pressure action of a metal brush, so as to prepare the fiber-reinforced aluminum-based composite material coating on the surface of the hub. And the molten metal is combined with the aluminum alloy hub. A layer of carbon fiber net is laid on a base body layer, metal melt conveyed by a screw feeding device is coated with a metal brush to be combined with the carbon fiber net, the metal melt is combined with a metal base body on the lower layer through holes of the carbon fiber net, a gap between the carbon fiber net and a metal coating layer is filled, and then a pressing wheel rolls ...

Beam and column joint concrete intercepting structure and construction method thereof

The invention relates to a beam and column joint concrete intercepting structure and a construction method thereof. The beam and column joint concrete intercepting structure comprises a baffle vertically inserted into a beam formwork and located between two adjacent transverse steel bars, and the baffle is arranged corresponding to a connecting joint of a beam and a column and matched with the distance between the two adjacent transverse steel bars; and the mounting piece is mounted at the bottom of the baffle plate, and is inserted and fixed on the bottom wall of the beam template, so that the bottom of the baffle plate is propped against and fixed on the bottom wall of the beam template. The vertically-arranged baffle is installed at the position, located between every two adjacent transverse steel bars, of the connecting joint of the beam and the column so as to be arranged between the beam concrete and the column concrete in a blocking mode, and due to the fact that the bottom of the ...

Inward inverted opening sash structure of curtain wall and construction method of inward inverted opening sash structure

The invention relates to a curtain wall inward inverted opening sash structure and a construction method thereof. The curtain wall inward inverted opening sash structure comprises a fixed pipe; the adjusting rod penetrates through the fixed pipe; one end of the first pressing plate is fixed at the end part of the adjusting rod; one end of the second pressing plate is rotationally connected to the end of the adjusting rod, and the second pressing plate and the first pressing plate define a splayed shape; the arc-shaped plate is connected between the first pressing plate and the second pressing plate and can be elastically deformed, and the top of the arc-shaped plate arches upwards and is fixedly connected with the fixing pipe; and two ends of the cross brace are respectively arranged on the first pressing plate and the second pressing plate in a sliding manner. The problem that traditional putty cannot be suitable for leveling of an arc-shaped structure is effectively solved, the radian ...

Optimization method of alloy grain boundary structure for friction stir additive manufacturing hub

The invention discloses an optimization method of an alloy grain boundary structure for friction stir additive manufacturing of a hub, which comprises the following steps of: firstly, manufacturing a hub part by using a friction stir additive manufacturing method, namely plasticizing alloy powder for the hub in the friction stir process and then generating metallurgical bonding on a substrate; and then the hub piece is manufactured in an additive manufacturing mode. Then, the hub part manufactured through friction stir additive manufacturing is placed in a heat treatment furnace to be heated and subjected to heat preservation, and after heat preservation is finished, the material is rapidly taken out and placed in an ice-water mixture to be subjected to water quenching treatment. According to the method, near-net forming of a workpiece in a complex shape is achieved, and meanwhile grain boundary characteristic distribution of the alloy for the hub can be optimized. Compared with other methods ...

Bridge construction and operation maintenance method, system, equipment and medium

The invention discloses a bridge construction and operation maintenance method, system, equipment and medium, and relates to the technical field of bridge construction. The method comprises the following steps: acquiring point cloud data and a building information model of a target bridge; preprocessing the point cloud data to obtain processed point cloud data; fitting, aligning and registering the processed point cloud data and the building information model with the correct format by utilizing 3D quality control and size detection software, and determining the current construction progress and the current construction quality; and generating a building construction monitoring report according to the current construction progress and the current construction quality. According to the invention, the accuracy of monitoring the bridge construction progress can be improved, and accurate monitoring and management of the bridge construction process can be realized.

Column-free glass handrail structure and construction method thereof

The invention relates to a stand-column-free type glass handrail structure and a construction method thereof.The stand-column-free type glass handrail structure comprises an installation base installed on a construction face in the design direction of the glass handrail structure, and an insertion groove is formed in the top of the installation base in the length direction of the installation base in a full-length mode; the bottom end of the glass panel is inserted into the slot, and the glass panel is vertically arranged; and the concrete layer is formed on the construction surface in a pouring manner and is used for burying and fixing the mounting seat. The mounting seat is fixed on the construction surface, the mounting seat is further buried and fixed through the concrete layer so as to ensure the firm fixing effect of the mounting seat, the glass panel is mounted on the mounting seat, and the load of the glass panel is transmitted to the construction surface and the concrete layer ...

White noise machine

Method for regulating and controlling grain boundary characteristic distribution of surface layer of hub material

The invention discloses a method for regulating and controlling grain boundary characteristic distribution of a surface layer of a hub material, which comprises the following steps of: firstly, pretreating austenitic stainless steel, and placing the material subjected to solution treatment on a sample holder of ultrasonic impact treatment equipment; the material surface is subjected to ultrasonic impact strengthening treatment by adjusting the amplitude of ultrasonic impact treatment equipment to be 30-50 microns, the frequency to be 20-40 kHz and the feeding speed to be 1-5 mm/s; and finally, the material subjected to ultrasonic impact treatment is placed in a heat treatment furnace, heat preservation is conducted for 24 h at the temperature of 947 DEG C, then the material is taken out and subjected to water quenching, and therefore control over the austenitic stainless steel surface layer grain boundary structure is achieved. By means of the method, a surface layer with excellent intergranular ...

Preparation method of copper-aluminum gradient alloy submarine cable welding joint

The invention discloses a preparation method of a copper-aluminum gradient alloy submarine cable welding joint, which comprises the following steps of: preparing copper-aluminum alloy powder with different mixing proportions by using a mechanical stirring mode, carrying out vibration densification and extrusion on powder blanks arranged according to gradients by adopting a cold isostatic pressing molding technology, preparing a copper-aluminum gradient blank through cold isostatic pressing, and carrying out heat treatment on the copper-aluminum gradient blank to obtain the copper-aluminum gradient alloy submarine cable welding joint. The copper-aluminum gradient material is prepared through equal channel angular pressing and heat treatment; according to the cold isostatic pressing and equal channel angular pressing processes adopted by the invention, the copper-aluminum ratio is controllable through pre-mechanical mixing; under the condition that the cross sectional area and the shape of ...

Method for regulating and controlling alloy grain boundary structure through ultrasonic micro-forging assisted selective laser melting

The invention discloses a method for regulating and controlling an alloy grain boundary structure through ultrasonic micro-forging assisted selective laser melting, which comprises the following steps: firstly, designing the shape of a part, setting selective laser melting process parameters and writing a printing program according to the size of the part, and the selective laser melting process parameters comprise a powder feeding process and a forming process; then layer-by-layer printing is carried out according to the written printing program until forming of the part is completed, and inert protective gas is introduced in the forming process to prevent the part from being oxidized; wherein in the printing process of each layer, the formed deposition layer is subjected to ultrasonic micro-forging treatment; and finally, annealing heat treatment is conducted on the material subjected to ultrasonic micro-forging treatment. According to the method, residual stress is introduced while part ...