Multicolor oxidation process for aluminum die casting

Abstract

The invention relates to a multicolor oxidation process for aluminum die castings. The multicolor oxidation process comprises the following steps of S1, preheating a smelting furnace; S2, melting themolten materials; S3, spraying a granular aluminum alloy flux; S4, filtering the molten aluminum; S5, carrying out vacuum die-casting formation; S6, carrying out highlight soaking treatment; S7, drilling; S8, sand blasting; S9, wire drawing; S10, milling a C angle; S11, carrying out one-color oxidation; S12, milling a highlight surface; and S13, carrying out dichroic oxidation. The process has thefollowing advantages that the mechanical property and the structural strength of the manufactured aluminum die castings are guaranteed.

Description

Technical field: [0001] The invention relates to the field of oxidation of aluminum die castings, in particular to a multi-color oxidation process for aluminum die castings. Background technique: [0002] The principle of die-casting process is to use high pressure to press molten metal into the cavity of a precision metal mold at high speed, and the molten metal is cooled and solidified under pressure to form a casting. The production efficiency of die-casting is high, and it can die-cast complex shapes, precise dimensions, clear outlines, and excellent surface quality. Die castings with high strength and hardness are widely used and developed rapidly. Aluminum die castings have good performance and process performance, so die castings develop rapidly and are widely used in various industrial sectors. extremely important position. [0003] The following defects exist in the production process of aluminum die castings: 1. For aluminum die castings with special structures, a...

AI Technical Summary

Problems solved by technology

[0003] The following defects exist in the production process of aluminum die castings: 1. For aluminum die castings with special structures, at present, the aluminum die castings are first die-casted, oxidized and colored, and then surface treatment such as drilling and chamfering is carried out. Burrs and other steps will damage the surface quality and mechanical properties of the workpiece; 2. When the aluminum die-casting is re-cast, the die-casting liquid will produce separation or eddy current, resulting in the phenomenon of eddy current entrainment in the die-casting liquid, so the die-casting liquid is easy to produce during the die-casting process. More bubbles, large number of bubbles and irregular distribution, affect the surface quality and mechanical properties of aluminum die castings after coloring and oxidation. The tensile strength can only reach 180MPa at most, and the elongation of aluminum die castings can reach 1.55% at most