Optimization of Extrusion Temperature for Vanadium-containing Magnesium Alloy for Automobiles
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摘要: 采用不同的挤压温度对汽车用含钒镁合金Mg-8Al-1Zn-0.5V试样进行了挤压成型，并进行了力学性能和显微组织的测试和分析。结果表明：挤压温度从300℃升高到425℃，合金试样的抗拉、屈服强度均先增大后减小，断后伸长率和平均晶粒尺寸均先减小后增大，组织和力学性能均得以改善和提升。与300℃挤压温度铸造时相比，375℃挤压温度下试样的抗拉、屈服强度分别增大了13.38%、14.57%，断后伸长率、平均晶粒尺寸分别减小了2.3%、18.11%。汽车用含钒镁合金Mg-8Al-1Zn-0.5V试样的挤压温度优选为：375℃。
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关键词:
- 汽车用含钒镁合金 /
- Mg-8Al-1Zn-0.5V /
- 挤压温度 /
- 力学性能 /
- 组织
Abstract: In this paper,the vanadium-containing magnesium alloy Mg-8 Al-1 Zn-0.5 V used for automobiles was extruded at different temperatures,and the mechanical properties and microstructure of the samples were tested and analyzed.The results show that with the extrusion temperature increasing from 300 ℃ to 425 ℃,both of the tensile strength and yield strength of the alloy samples increase first and then decrease,and the specific elongation coupled with the average grain size of the samples decrease first and then increase,with both of the microstructure and mechanical properties of the samples improved.Compared with those of the sample at 300 ℃ of the extrusion temperature,the tensile strength and yield strength respectively increase by 13.38% and 14.57% with the specific elongation and average grain size separately decreased by 2.3% and 18.11% for the sample extruded at 375 ℃.The optimum extrusion temperature for the vanadium-containing magnesium alloy Mg-8 Al-1 Zn-0.5 V is determined at 375 ℃. -
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