Method for uniformly annealing cast AZ91 mognisium alloy

Abstract

The invention relates to a cast condition AZ91 magnesium alloy equal annealing method that belongs to metal material heat process field. It puts the cast condition AZ91 magnesium alloy into heating furnace heating to 350-450 degree centigrade keeping the temperature for 5-24 hours, then, takes out and cooling naturally. It could make the tensile strength increase from 163MPa to 240MPa, and the extending ratio increase from 3.2% to 10%. The invention enhances the capability of the material and the component.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of metal materials, and in particular provides a method for uniform annealing of cast AZ91 magnesium alloy. Background technique [0002] Magnesium alloys are currently one of the lightest metal structural materials in industrial applications, and are increasingly widely used in aerospace, automobile manufacturing, and electronic communications. Since magnesium alloy resources are relatively abundant and its products are easy to recycle, the development and utilization of magnesium alloys has been paid more and more attention under the situation that energy and resources are increasingly affecting the sustainable development of society [Mordike B L, et al.Magnesium: properties- applications-potential. Materials Science and Engineering A, 2001, 302: 37-45]. AZ91 magnesium alloy is one of the most widely used commercial magnesium alloys, the as-cast structure consists of α-Mg and Mg 17 al ...

AI Technical Summary

Problems solved by technology

When sand casting or iron mold casting is adopted, the performance of AZ91 magnesium alloy is poor, the tensile strength is about 150-170MPa, and the elongation is 2-3%.

However, there is no report on the homogenization annealing process of as-cast AZ91 magnesium alloy materials or parts