A kind of mg-mn deformed magnesium alloy and its preparation method

Abstract

The invention provides a Mg-Mn deformed magnesium alloy and a preparation method thereof, which belong to the field of magnesium alloy design, and its raw material components and mass percentages are: industrial pure manganese 0.2% to 5.0%; the rest is industrial pure magnesium and unavailable Avoid impurities. The preparation steps are as follows: first melting magnesium, then adding magnesium-manganese master alloy, stirring and refining, pouring into ingots, then performing homogenization heat treatment on the ingots, and extruding to obtain corresponding extruded profiles. The present invention utilizes cheap magnesium-manganese master alloys to prepare novel deformed magnesium alloys with better strength and toughness. Compared with commercial magnesium alloys widely used at present, the deformed magnesium alloy profiles have low cost (compared with AZ31 series magnesium alloys, Mg -Mn (calculated based on Mn: 1.0wt.%) binary deformed magnesium alloy can save about 400 yuan / ton), the heat deformation temperature of the alloy is low, and it has excellent plastic processing performance, its strength and toughness Significantly better than conventional 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. Background technique [0002] 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 Zn and Zr...

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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.

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