103 results about "Aluminium alloy" patented technology

The invention relates to a method for enhancing the surface of magnesium aluminium alloy by laser remelting, aiming at enhancement processing of the surfaces of magnesium aluminium alloy plates and magnesium aluminium alloy rods by the methods of flame spraying of alloyed powder and laser remelting. The method is characterized by cleansing the surface of the magnesium aluminium alloy, carrying out oxy-acetylene flame spraying on the alloyed powder, namely aluminium nickel alloy powder, nickel-chromium-boron-silicon-iron master alloy powder and neodymium powder, carrying out remelting and curing on the surface of the magnesium aluminium alloy on a laser processor, carrying out omnibearing radiation by laser beams according to trace curves set by computer programs so that a nickel base alloy layer is melted and cured on the surface of the magnesium aluminium alloy to form the alloy layer, therefore, the hardness of the surface of magnesium aluminium alloy is greatly improved by 8-10 times as high as that before processing, the wearing resistance and corrosion resistance of the surface of magnesium aluminium alloy are greatly improved respectively by 56% and 56.4%. The method has short process flow, easy realization, safety, stability and reliability and firm solid melting layer, is not easy to fall off and can enhance the surfaces of the magnesium aluminium alloys with various profiles.

A process for metalizing a ceramic surface or attaching a ceramic to a metal is provided. The process may comprise: immersing the ceramic into an aluminum or aluminum alloy melt, making the ceramic move or stay still relative to the melt to adhere the melt to the ceramic; and then removing the ceramic from the melt to unaffectedly cool the film adhered thereto. The process can attach an aluminum or aluminum alloy thin film having a thickness of several to tens of micrometers on a ceramic surface. The thin film is formed by solidification, and does not have microscopic faults such as oxide film inclusions or pores, therefore having proper physical of mechanical properties of aluminum. Ceramics or a ceramic and a metal can be brazed via the surface metalizing film, the bonding strength of their interface can over the strength of aluminum itself.This invention discloses a process for metalizing the surface of a ceramic and a process for attaching a ceramic to a metal. A process for attaching an aluminum or aluminum alloy thin film to a ceramic surface comprises the steps of: immersing a ceramic surface to be metalized into a aluminum or aluminum alloy melt, and making the ceramic move or stay still relative to the melt to adhere the melt of the aluminum or aluminum alloy to the metalizing surface of the ceramic; and then removing the metalizing surface of the ceramic from the melt to unaffectedly cool the aluminum or aluminum alloy liquid film adhered thereto to obtain a ceramic having the aluminum or aluminum alloy thin film attached to the surface. The process to attaching aluminum or aluminum alloy thin film on the surface of a ceramic of the present invention can attach an aluminum or aluminum alloy thin film having a thickness of several micrometers to tens of micrometers on the surface of a ceramic. The thin film is formed by the solidification of the aluminum of aluminum alloy liquid film attached on the surface of a ceramic, and it does not have the microscopic faults such as oxide film inclusions or pores, therefore having the proper physical of mechanical properties of aluminum. Ceramics or a ceramic and a metal can be brazed via the surface metalizing film, the bonding strength of their interface can over the strength of aluminum itself.

The invention relates to an aluminum-based composite material for the composite pan bottom of a stainless steel pan and a preparation method thereof. The aluminum-based composite material consists of an aluminum-based body and reinforced particles, wherein the aluminum-based body is pure aluminum or an aluminum alloy; the reinforced particles are any one of SiC, Al2O3, B4C or SiO2 particles; the particle diameter is between 30 and 100 mu m; the volume fraction is between 5 and 30 percent; and the reinforced particles are uniformly distributed in the aluminum-based body and has good combination with the interface of the aluminum-based body. The preparation method comprises the following steps of: smelting aluminum in a resistance furnace, adding proper active elements into the resistance furnace after refining, adding a certain amount of treated particles into the resistance furnace under the protection of atmosphere, stirring, pouring and molding. A product has high specific stiffness, good composite matching with stainless steel (thermal expansion coefficient is close to that of stainless steel) and high heat conductivity; and the prepared composite pan bottom has the characteristics of light weight, difficult deformation, uniform heat transfer and the like.

A method of laser welding a workpiece stack-up that includes two or more overlapping aluminum alloy workpieces is disclosed. The method involves controlling the power level of the laser beam during at least one of an initial stage or a final stage of advancing the laser beam along a weld path so as to limit a line energy of the laser beam during such stage or stages to being no greater than 10% above a line energy of the laser beam during an intermediate stage of laser beam advancement that is performed between the initial and final stages. By limiting the line energy during the initial and / or final stages of laser beam advancement along the weld path, excessive fusion of the workpiece stack-up assembly can be avoided in those locations to help protect against hot-cracking in the resultant laser weld joint.

A method of resistance spot welding aluminum alloy workpieces together includes several steps. In one step a welding electrode is provided. The welding electrode has a weld face. In another step, the weld face of the welding electrode is shaped to have a desired radius of curvature. The shaped weld face is then textured to a desired surface roughness, and resistance spot welding using the welding electrode is performed to the aluminum alloy workpieces. In yet another step, the weld face is dressed to an extent sufficient to remove contamination build-up that may have accumulated on the weld face from the aluminum alloy workpieces.

A method for manufacturing a crankshaft supporter having a bearing holding section that holds a bearing for supporting a crankshaft, and that is cast in aluminum alloy with a preform cast inside, the preform having a through hole extending therethrough. Provided are a core pin to process the through hole, and a pin hole shaped in the preform to accommodate the core pin. The core pin includes a pin insert section having an outer diameter less than inner diameter of the preform pin hole, and a head section having an outer diameter greater than the inner diameter of the preform pin hole. The pin hole insert section is inserted into the pin hole to contact the head section with an outer surface of the preform for securement inside a mold for casting. The core pin is removed during subsequent cutting of a larger diameter hole through the cast bearing holding section.

The invention discloses a nano multi-layer composite solid lubricating film layer with a long service life under space irradiation and preparation thereof. The nano multi-layer composite solid lubricating film layer composed of a Ti binding layer, a TiN bearing layer and an AgTiNi / MoS2Ti nano multi-layer lubricating functional layer is deposited on a titanium alloy substrate, an aluminum alloy substrate, a stainless steel substrate, a bearing steel substrate and the like by adopting a closed magnetic field unbalanced magnetron sputtering technology. The nano multi-layer composite film layer can reliably serve for a long time in strong space irradiation environments such as low-orbit high atomic oxygen density, medium-high-orbit high electron proton density and high ultraviolet irradiation dose, and is high in bearing capacity and low in friction coefficient, thus, the service life of a moving part of a spacecraft exposed in the space irradiation environments can be greatly prolonged, and the reliability of the moving part is improved. In addition, the preparation method has the characteristics that the process is environment-friendly and flexible, the film thickness is uniform, the compactness is good, the preparation process of the film layer is controlled in a programmed manner, the modulation period of the film layer is easy to regulate and control, and batch treatment can be realized, industrial production is easy to realize, and the good application prospect is achieved.

The invention relates to a new aluminum alloy heat transmission material composite line: including a grinding device, a turning device, a vacuum suction crane, a feeding buffer device, a feeding roller table, a brazing pressurizing device, a turning device, a strapping machine, Outfeed roller table, hydraulic pneumatic system and electric control system. The milled aluminum ingots are transported to the feeding roller table, the grinding device grinds and removes the oxide layer on the alloy plate placed on the grinding platform, the turning device turns the polished composite surface downward, and the vacuum suction crane absorbs the composite sheet and places it on the On the aluminum ingot, the feed roller transports the aluminum ingot and the alloy plate to the brazing pressure device for brazing, and the welded composite aluminum ingot is sent to the turning device, which turns the composite aluminum ingot 180° to make the other compound aluminum ingot Facing up, it is transported to the upper alloy plate position towards the feed side, and after the alloy plate is placed again for brazing, the double-sided composite aluminum ingot is sent to the baler through the turning device, and sent to the discharge roller table, and the composite aluminum ingot is hoisted by the driving car. Walk. The invention has the beneficial effects of simple operation, high production efficiency, low labor intensity, safety and reliability.