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为了优化用于数控机床的Mg-8Al-0.5Zn-0.5Ti含钛镁合金板材的挤压工艺参数,为工业化生产提供试验数据和参考。采用不同的挤压温度、挤压速度和挤压比,在工业化挤压生产线上进行板材的挤压试验和显微组织、力学性能的测试与分析。结果表明:随挤压温度从300℃提高至360℃、挤压速度从1 m/min增大至5 m/min、挤压比从8增大至16,板材的晶粒先细化后粗化,力学性能先提高后下降。与300℃挤压相比,350℃挤压时板材的抗拉强度、屈服强度分别增大22.7%、34.0%。挤压温度、挤压速度和挤压比分别优选为350℃、3 m/min、14。
In order to optimize the extrusion process parameters of Mg-8Al-0.5Zn-0.5Ti titanium-containing magnesium alloy sheet used in CNC machine tools, it provides experimental data and reference for industrial production. Using different extrusion temperature, extrusion speed and extrusion ratio, extrusion test and microstructure, mechanical properties of the test and analysis of the plate in the industrial extrusion production line. The results show that as the extrusion temperature increases from 300 ℃ to 360 ℃, the extrusion speed increases from 1 m / min to 5 m / min and the extrusion ratio increases from 8 to 16. The mechanical properties first increase and then decrease. Compared with the extrusion at 300 ℃, the tensile strength and yield strength increase by 22.7% and 34.0% at 350 ℃. The extrusion temperature, extrusion speed and extrusion ratio are preferably 350 ° C, 3 m / min, 14, respectively.