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采用不同工艺对Mg-10Gd-3Y-0.5Zr高强镁合金进行了热处理试验,应用模糊数学方法构建了多元隶属函数,并对高强镁合金热处理后的平均晶粒尺寸进行了预测、检验和验证。结果表明:多元隶属函数不仅对Mg-10Gd-3Y-0.5Zr高强镁合金热处理后的平均晶粒尺寸具有较佳的预测能力,而且对Mg-15Gd-5Y-0.6Zr和Mg-8Gd-2Y高强镁合金热处理后的平均晶粒尺寸具有较好的预测能力。与生产线传统热处理工艺相比,采用试验优化热处理工艺制备的Mg-15Gd-5Y-0.6Zr高强镁合金的抗拉强度增加18%,屈服强度增加26%,断后伸长率增加7.7%;Mg-8Gd-2Y高强镁合金的抗拉强度增加17%,屈服强度增加25%,断后伸长率增加6.8%。
The heat treatment experiments of Mg-10Gd-3Y-0.5Zr high-strength magnesium alloy were carried out by different processes. The multivariate membership function was constructed by fuzzy mathematical method. The average grain size of high-strength magnesium alloy after heat treatment was predicted, verified and verified. The results show that the multivariate membership function not only has better predictive ability for the average grain size of Mg-10Gd-3Y-0.5Zr high-strength magnesium alloy after heat treatment, but also has better predictive ability for Mg-15Gd-5Y-0.6Zr and Mg-8Gd-2Y The average grain size after heat treatment of magnesium alloy has better predictive ability. Compared with the traditional heat treatment process of the production line, the tensile strength of Mg-15Gd-5Y-0.6Zr high-strength magnesium alloy prepared by experimental optimization heat treatment increased by 18%, yield strength increased by 26% and elongation at break increased by 7.7% The tensile strength of 8Gd-2Y high-strength magnesium alloy increased by 17%, the yield strength increased by 25% and the elongation after fracture increased by 6.8%.