Magnesium alloy composite forming method

Abstract

The invention relates to a kind of method of compound forming magnesium alloy. The method can produce the casting blank with only one step through suitable mould. Fist, heat the mould and the casting blank for about 10 to 30 minutes to 300 to 500 DEG C. With that temperature, form the casting blank at transfiguring speed of 300-900 mm / min, so as to produce the product with single step. The invention has good forming technique and low cost, meanwhile maintains the good quality and automatism of mould. The technique has advantages such as good quality, low cost, high efficiency, high yield and so on. And the magnesium alloy product produced has excellent all-round performance.

Description

technical field [0001] The invention relates to a composite forming method of magnesium alloy, in particular to a method for manufacturing magnesium alloy structural parts by adopting casting preform blank and short-flow die forging. Background technique [0002] At present, the forming methods of magnesium alloys at home and abroad are limited to casting and a small amount of conventional forging, extrusion, rolling and stamping. Limited by the forming method, the current magnesium alloy components mainly have the following deficiencies: (1) The cast magnesium alloy parts have defects such as low internal structure density and coarse grains, which directly limit the strength of the magnesium alloy and lead to the failure of the magnesium alloy. The application is difficult to meet the needs of high-performance magnesium alloy parts; (2) Although the conventional forging process can improve the mechanical properties of magnesium alloy parts through plastic deformation, it is...

AI Technical Summary

Problems solved by technology

Limited by the forming method, the current magnesium alloy components mainly have the following deficiencies: (1) The cast magnesium alloy parts have defects such as low internal structure density and coarse grains, which directly limit the strength of the magnesium alloy and lead to the failure of the magnesium alloy. The application is difficult to meet the needs of high-performance magnesium alloy parts; (2) Although the conventional forging process can improve the mechanical properties of magnesium alloy parts through plastic deformation, it is difficult to plastically process magnesium alloys at room temperature because there are only three slip systems at room temperature Forming, and the high starting temperature of the high-temperature slip system determines the high forgeable temperature and small temperature range of the magnesium alloy, so the forming is difficult

[0005] However, the magnesium alloy forming method proposed by the Chinese patent CN1443862A must refine the grains through solid solution treatment, and then perform at least two forgings to obtain the final product. Dissolution treatment and multi-pass deformation increase the process steps, and the production cost is bound to be high; while the plastic forming method of magnesium alloy sheet proposed by Chinese patent CN1345641A can improve the mechanical properties of magnesium alloy parts, increase productivity and save metal materials, but due to Can only form magnesium alloy sheets, the forming range is small, and the application range is limited