A semi-solid rheological die-casting process for aluminum-silicon alloy gate parts

Abstract

The invention discloses aluminum-silicon alloy brake-separating piece semisolid rheological diecasting forming process. The process includes the four steps of preprocessing of pins of brake-separating pieces, preparing of semisolid slurry, rheological diecasting forming and combined heat treating. The process particularly includes the steps of carrying out composite electromagnetic mixing on smelted aluminum-silicon alloy liquid within a temperature interval of 585-625 DEG C and preparing the semisolid slurry, using a pouring ladle to pour the prepared semisolid aluminum-silicon alloy slurry on a shot chamber of a die-casting machine for die-casting forming, and finally carrying out combined heat treatment on the obtained brake-separating pieces. The aluminum-silicon alloy brake-separating piece semisolid rheological diecasting forming process effectively solves the problems that the aluminum-silicon alloy brake-separating pieces produced through adoption of the traditional sand casting process are large and nonuniform in textures, the pins can easily fall off, and the like. The aluminum-silicon alloy brake-separating piece semisolid rheological diecasting forming process improves mechanical properties of castings. Moreover, the surface quality and material utilization rate of the castings are greatly improved, and the aluminum-silicon alloy brake-separating piece semisolid rheological diecasting forming process is suitable for large-scale industrial production and has high promotional value.

Description

technical field [0001] The invention belongs to the technical field of light alloy semi-solid forming, and in particular relates to a semi-solid rheological die-casting forming process of an aluminum-silicon alloy gate opening. Background technique [0002] Metal semi-solid processing has a wide range of applications. All metals or alloys with a solid-liquid two-phase region can achieve semi-solid processing. From the perspective of research materials, it can be divided into semi-solid processing of non-ferrous metals and their alloys and low melting point materials. The semi-solid processing of high melting point metal materials such as iron and steel materials and composite materials is also expanding year by year; it is also suitable for a variety of processing techniques, such as casting, rolling, extrusion and forging. Therefore, since the late 1980s, this technology has been widely recognized and highly valued by scientific and technological workers in developed countr...

AI Technical Summary

Problems solved by technology

At present, the manufacturing process of gate parts is mainly based on sand casting, metal casting and high pressure casting. There are many defects in these casting processes, for example: the internal structure of sand casting castings is coarse, the strength is low, and there are trachoma; the metal mold The yield of finished castings is low and the cost is high; the high-pressure castings have serious internal pores and cannot be heat treated, and the pins on the castings are not easy to rotate, etc.

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