Mg-Mn wrought magnesium alloy and preparation method thereof

Abstract

The invention provides a Mg-Mn wrought magnesium alloy and a preparation method thereof and belongs to the field of magnesium alloy design. The Mg-Mn wrought magnesium alloy comprises the following raw material components in percentage by mass: 0.2-5.0% of industrial pure manganese and the balance of industrial pure magnesium and inevitable impurities. The preparation method comprises the following steps: firstly melting magnesium, then adding magnesium-manganese intermediate alloy, stirring and refining and then pouring into an ingot, subsequently carrying out homogenizing heat treatment on the ingot, and extruding, so that corresponding extruded section is obtained. According to the invention, cheap magnesium manganese intermediate alloy is utilized, novel wrought magnesium alloy with good strength and toughness is prepared, compared with the currently widely used commercial magnesium alloy, the wrought magnesium alloy section is low in cost (compared with AZ31 magnesium alloy, cost can be greatly saved in a Mg-Mn (calculated according to Mn content in 1.0wt%) binary wrought magnesium alloy), heat distortion temperature of the alloy is low, the novel wrought magnesium alloy has excellent moulding and processing performances, and strength and toughness of the novel wrought magnesium alloy are obviously better than those of the traditional commercial AZ31 magnesium alloy.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a rare-earth-free, low-cost, high-plasticity, high-strength deformable magnesium alloy and a preparation method thereof. [0002] Background technique [0003] With the continuous development of science and technology, the consumption of global resources is increasing, leading to the depletion of non-renewable resources such as oil and coal. Therefore, vigorously developing lightweight structural materials with the goal of reducing energy consumption and carbon emissions has become a hot spot in material science research. Magnesium, with its advantages of low density and large reserves, has gained a lot of attention in the research and development of new materials. Widespread concern. At present, the widely used AZ series magnesium alloys containing Al have excellent room temperature performance, but poor high temperature stability; while the ZK series magnesium alloys containing...

AI Technical Summary

Problems solved by technology

At present, the widely used AZ series magnesium alloys containing Al have excellent room temperature performance, but poor high temperature stability; while the ZK series magnesium alloys containing Zn and Zr have good high temperature stability, but the burning of the alloying element Zr during the smelting process serious damage, resulting in high cost, which is not conducive to further development and application; magnesium alloys containing rare earth elements (RE) have excellent room temperature ductility (Mg-RE binary magnesium alloy) and high service strength (Mg-RE -Zn series magnesium alloy), but because rare earths are expensive, they are mostly used in high-end industries such as military industry, and rare earth resources are getting less and less, and their prices are getting more and more expensive.