Low-cost high-performance mg‑al‑mn magnesium alloys

Abstract

The invention relates to a low-cost high-performance Mg-Al-Mn magnesium alloy which comprises the following components in percentage by weight: 0.5-9.0% of Al, 1.0-5.0% of Mn and the balance of Mg and unavoidable impurities. The Mg-Al-Mn three-element alloy provided by the invention is a high-performance cast magnesium alloy and wrought magnesium alloy without rare earth elements, the adopted raw materials are relatively cheap commercially pure aluminum and magnesium-manganese intermediate alloys, and the wrought magnesium alloy is prepared by the following steps: firstly melting Mg; then adding Al and Mg-Mn intermediate alloys; stirring and refining and pouring to obtain an ingot; performing machining and homogenizing heat treatment; and performing hot-working wrought processes such as extrusion, rolling and forging to obtain corresponding wrought sections. The melting process is adopted to prepare a novel magnesium alloy with relatively good strength, toughness and corrosion resistance; the mechanical properties such as strength and plasticity and toughness of the wrought form are better than those of traditional commercial wrought magnesium alloy AZ31; and the as-cast comprehensive mechanical properties are better than those of traditional commercial cast magnesium alloys AZ91 and AM60.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a novel Mg-Al-Mn alloy and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology and the continuous development of the economy, the consumption of petroleum, coal and other resources is increasing day by day, which has aggravated the deterioration of the environment, especially the continuous development and growth of the automobile industry, which consumes a large amount of resources such as steel, aluminum alloy and petroleum. , exacerbating the emission of greenhouse gases, leading to global warming. Therefore, vigorously developing lightweight structural materials to reduce resource consumption and greenhouse gas emissions has become the focus and focus of material science research. Among the existing structural materials, magnesium and magnesium alloys have gradually become a new material research and development...

AI Technical Summary

Problems solved by technology

Among them, the room temperature performance of the AZ series magnesium alloy is relatively excellent, but the corrosion resistance and high temperature stability of the alloy are poor; the high temperature performance of the ZK series magnesium alloy is excellent, but the alloy element Zr is seriously burned during the melting process of the alloy, resulting in relatively high cost. High, which is not conducive to the further development and application of the alloy; WE series magnesium alloys have excellent ductility at room temperature, but the content of rare earth elements in the alloy is high and the price is expensive, resulting in high cost of the alloy, which is mostly used in the military field, which is not conducive to the development of the alloy and application

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