Magnesium-aluminum-zinc wrought magnesium alloy containing calcium and rare-earth samarium

Abstract

The invention relates to a magnesium-aluminum-zinc wrought magnesium alloy containing calcium and rare-earth samarium. The wrought magnesium alloy comprises the following components by mass percent: 5.3% to 6.0% of Al (aluminum), 0.7% to 1.0% of Zn (zinc), 0.4% to 0.5% of Ca (calcium), 0.2% to 1.5% of Sm (samarium), less than or equal to 0.15% of inevitable impurities and the balance of Mg (magnesium), wherein all the components taken as raw materials in proportion are fused and rapidly cooled in a salt bath; an obtained alloy spindle is annealed in a homogenization manner at 400 DEG C and air-cooled to reach a room temperature; then the hot extrusion is carried out on the alloy spindle at 360 DEG C according to the extrusion ratio being 25:1, so that the magnesium-aluminum-zinc wrought magnesium alloy containing the calcium and the rare-earth samarium is obtained. After the thermal deformation is carried out on the magnesium alloy, the tensile strength and the yield strength of the magnesium alloy are improved. Thus, the foundation for actual production applications of the wrought magnesium alloy is laid.

Description

technical field [0001] The invention relates to a metal material, in particular to a magnesium-aluminum-zinc deformed magnesium alloy containing calcium and rare earth samarium. Background technique [0002] In recent years, affected by the energy crisis and environmental problems, in order to reduce energy consumption and reduce environmental pollution caused by exhaust emissions, higher requirements have been put forward for automobile lightweight. Therefore, as the lightest metal structural material, the study of magnesium alloy has received great attention. Under the same volume, magnesium alloy is 36% lighter than aluminum alloy and 77% lighter than steel. It has low density, high specific strength and specific stiffness, excellent machinability and good casting performance, so it is widely used in the fields of automobiles and aviation. [0003] Mg-Al-Zn series magnesium alloys (such as AZ31, AZ61 and AZ91, etc.) are currently the most widely used series of magnesium...

AI Technical Summary

Problems solved by technology

But it has its own shortcomings that are difficult to overcome: first, the Mg in the as-cast Mg-Al-Zn series magnesium alloy 17 Al 12 The form of divorced eutectic precipitates along the grain boundary in the form of a network, and these coarse Mg 17 Al 12 The presence of phases is detrimental to the mechanical properties of the alloy

Up to now, there is no report on the effect of compound addition of alkaline earth elements Ca and rare earth Sm on the properties of Mg-Al-Zn magnesium alloys

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