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主要研究了Mg-2Al-1Zn-1Si-0.7Sr-0.5Sb镁合金的多通道分流挤压,对比分析了不同挤压比和挤压温度对合金组织与性能的影响。结果表明,当挤压比不变时,随着挤压温度的升高,合金晶粒逐渐长大,合金的抗拉强度逐渐减小;当挤压温度不变时,随着挤压比的增大,合金晶粒逐渐细化,合金的抗拉强度逐渐增大。九组对比试验中,当挤压温度340℃和挤压比25时,多通道分流挤压后的Mg-2Al-1Zn-1Si-0.7Sr-0.5Sb合金的晶粒最细小,焊合区和焊合区以外区域平均晶粒尺寸分别为3.8、13μm,合金抗拉强度达到最大,为290 MPa。
The multi-channel shunt extrusion of Mg-2Al-1Zn-1Si-0.7Sr-0.5Sb magnesium alloy was mainly studied. The effects of different extrusion ratio and extrusion temperature on the microstructure and properties were investigated. The results show that when the extrusion ratio is constant, as the extrusion temperature increases, the alloy grains grow up gradually, and the tensile strength of the alloy decreases gradually. When the extrusion temperature is constant, with the extrusion ratio Increasing, the alloy grain gradually refined, the tensile strength of the alloy gradually increased. Nine groups of comparative experiments, when the extrusion temperature of 340 ℃ and the extrusion ratio of 25, multi-channel shunt extrusion Mg-2Al-1Zn-1Si-0.7Sr-0.5Sb alloy grain the smallest, weld zone and The average grain sizes of the regions outside the welding zone are 3.8 and 13 μm, respectively, and the tensile strength of the alloy reaches the maximum of 290 MPa.