Magnesium alloy of high intensity and high yield ratio and preparation method thereof

Abstract

The invention provides a magnesium alloy material of high intensity and high yield ratio. The alloy comprises the following components by mass: 5.0-9.0% of Zn; 0.5-1.5% of Mn; 1-10% of Sn; less than 0.15% of inevitable impurities; and the balance magnesium. By means of plastic forming and a choice of reasonable technological conditions for heat treatment after forming, the magnesium alloy material of the invention can be of high intensity and high yield ratio, and is higher than the high-strength wrought magnesium alloy ZK60 in terms of yield strength and tensile strength. With low cost, good extrudability and formability at a low temperature, the magnesium alloy material provided in the invention boasts substantial application potential, thus being able to partly replace the magnesium alloy material ZK60.

Description

technical field [0001] The invention relates to a metal material, which belongs to the field of magnesium alloy production in nonferrous metals, in particular to a deformed magnesium alloy material with high strength and high yield ratio and a preparation method thereof. Background technique [0002] Magnesium alloy has high specific strength, specific stiffness, excellent damping performance, and many characteristics such as antimagnetic, shielding, heat dissipation, easy cutting, easy recycling, etc. It is currently the lightest metal structural material in industrial applications. It is used in automobiles, electronics, Electrical appliances, transportation, aerospace, aviation, and national defense military industries also have extremely important application values ​​and broad application prospects, especially in terms of lightweight, which have significant advantages that are difficult to replace, which can significantly reduce weight and save fuel consumption. However...

AI Technical Summary

Problems solved by technology

At present, most high-strength magnesium alloy materials contain zirconium, which generally refers to Mg-Zn-Zr alloys. The typical grade is ZK60. The tensile strength of this alloy reaches 340MPa, but it contains precious metal Zr, which is expensive and greatly limits the scope of application.

Zirconium-free magnesium alloys are the most widely used metal materials at present, generally referring to Mg-Al-Zn and Mg-Mn alloys, typical grades are AZ31 and MB8, although they are cheap, their strength is low and their mechanical properties are far away. It is far from meeting the requirements of expanding magnesium alloys to a wider range of industrial fields, so it is of great significance to develop new high-strength magnesium alloys that do not contain zirconium

Images