Extruding Process Optimization of Magnesium Alloy Plates Containing Titanium for Numerical Control Machine
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摘要: 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。Abstract: In order to optimize the extrusion process parameters of Mg-8Al-0.5Zn-0.5Ti magnesium alloy plates containing titanium and magnesium alloy, and to provide experimental data and reference for the in-dustrial production,the extrusion experiments had been carried out on the extrusion line with various ex-trusion temperature,extrusion speed and extrusion ratio.And the resulting microstructure observation and mechanical properties test had been performed.The results showed that when the extrusion temperature in-creased from 300℃ to 360℃, and the extrusion speed increased from 1 m/min to 5 m/min,or the extru-sion ratio increased from 8 to 16,grain size of the plate was firstly refined and then coarsened, and the me-chanical properties of the plate were firstly improved and then decreased.Comparing with the extrusion temperature at 300℃,the tensile strength and yield strength of the plate extruded at 350℃ increased by 22.7% and 34.0%,respectively.The optimized extrusion temperature,extrusion speed and extrusion ratio were 350℃,3 m/min and 14,respectively.
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