Method for anodic oxidation surface treatment of aluminum alloy die castings

The invention provides an anodized surface treatment process method for aluminum alloy die castings, so as to solve the problem that traditional anodized surface treatment processes cannot be applied to die-cast aluminum alloy products. The specific process method is to first use aluminum alloy die-casting process to prepare the blank, and then perform appropriate mechanical processing on the product. Before the anodizing surface treatment, the surface is sandblasted to obtain a uniform and dense surface sandblasting layer, and then the anodized surface treatment process is used to obtain the ideal aluminum alloy product.

Aluminum and aluminum alloy surface composite coating. The preparation process of the aluminum and aluminum alloy surface composite coating involved in this patent is as follows: first treat with an aqueous solution containing metal ions (selected from Cr, zr, and others) to form a bottom film, and then Then apply the organic composition. The organic composition contains 1:(005-200 ethylene-, β-non-gold saturated carboxylic acid (ionomer resin, with at least one selected from epoxy, trialkoxysilyl, oxazolyl and isocyanate groups The crosslinking agent and the paraffin wax or polyethylene wax as a lubricant. After the coating is dried, it has good processing properties, can be printed, and is resistant to solvents, alkalis, corrosion and sweat marks.

Semi-solid forming A-S-Cu alloy. This patent invented an aluminum-silicon-copper alloy for semi-solid forming (die forging and injection). The composition (mass fraction, %) of the alloy is as follows: S5~72, Cu1-5, Mg<l1, Zn<3, Fe<15, other impurities each <1, the sum is <3, and the rest are A.si and Cu The content relationship of S<75%, Cu3%. The production process is to first prepare semi-solid forming ingots with fine grains and uniform distribution of spherical grains, heating to a semi-solid with 35% to 55% liquid, and then forming parts.

A direct quenching heat treatment method for aluminum alloy castings. The present invention introduces a direct quenching heat treatment method for heat treatment of aluminum alloy castings. According to the method of the present invention, aluminum alloy castings can be heated to the solid solution temperature, and kept in this temperature range for a period of time, so that the hardened phase is fully dissolved into the aluminum solid solution, and the insoluble phase is changed. The alloy castings are quenched. The quenching method of the present invention rapidly cools the aluminum alloy casting from the solution treatment temperature to the aging treatment temperature directly, eliminating the room temperature holding time between the solution treatment and the aging treatment used in the conventional heat treatment process. The heat treatment process of the present invention can reduce heat treatment procedures and equipment, eliminate part of the waste of heat, reduce the heat treatment residual stress of the casting, and at the same time provide the possibility for the formation of new precipitated phases. Wear-resistant and impact-resistant composite used in wear and high-power working environments Casting US Patent Us8241761 The present invention introduces a composite casting used for surface wear resistance. This casting has a matrix composed of tough materials, and many wear-resistant inserts are cast in the matrix. The sickle block is made of a carbon-containing wear-resistant alloy. According to the use conditions of the casting, different wear-resistant alloys can be used to make the insert. The wear-resistant alloy is cast, forged or rolled to form bars with different shapes and sections, and then cut into inserts of the required shape and size. The trowel requires proper heat treatment. The body material can be low carbon steel, aluminum alloy or magnesium alloy, or even polymer. The manufacturing method of composite castings is to place the inserts of the selected shape with a template in the lower box of the mold, arrange the inserts according to the designed arrangement, and then pour the matrix alloy liquid into the mold, and wait for the alloy in the mold After the liquid solidifies, the casting is taken out.