Casting extruding compound shaping method of magnesium alloy automobile hub

Abstract

The invention provides a casting-extrusion compound forming method for a magnesium alloy automobile wheel hub, which adopts a casting process to make a billet with a reasonable original structure and shape, and is characterized in that there are pre-forming, upsetting extrusion forming, isothermal extrusion, and fine shaping processes; wherein: casting After the billet and pre-forming, the pre-allocation required for the extrusion process that fills the mold cavity is left; the critical deformation control method is used to control the deformation degree, deformation rate and deformation temperature in the process of upsetting extrusion forming and isothermal extrusion. And control it within the scope of its permission; spray graphite lubricant in the mold. In order to prevent the grain growth caused by reheating and reduce the mechanical properties, the temperature of the forming blank gradually decreases with the increase of the process. The wheel hub produced by the method has fine crystal grains, good mechanical performance and surface quality. It is also suitable for use in the manufacture of other magnesium alloy ring and disc parts.

Description

1. Technical field [0001] The invention belongs to the casting and extruding forming technology of magnesium alloy, in particular to the casting-extruding composite forming method of magnesium alloy automobile wheel hub and ring or disc-shaped parts. 2. Background technology [0002] With the development of the domestic automobile industry, especially the continuous innovation of high-end automobiles, in order to reduce the weight of the automobile itself, improve fuel efficiency, reduce emission pollution, and ensure automobile safety, magnesium alloy materials are increasingly favored by automobile manufacturers. and has begun to be applied. For ring-disc parts such as automobile wheels, gravity casting, ingot-die forging, ingot-die forging-rolling and other methods are currently used to manufacture them. For example: "Research on Magnesium Alloy Automobile Wheel Casting" published in "Casting Technology" magazine in May 2001, the conclusion of the research on the product...

AI Technical Summary

Problems solved by technology

This method makes the wheel hub made of magnesium alloy material have good structure and mechanical properties, but the process is complicated, more equipment is required, the investment is large, and the production cost is very high

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