锻压技术

T6热处理对6061铝合金大型锥筒形件的力学性能及组织的影响

英文标题：Influence of T6 heat treatment on mechanical properties and microstructure for 6061 aluminum alloy large cone-cylinder part

作者：白雪智李国俊李碧聪李旭斌张治民

单位：中北大学材料科学与工程学院

关键词：6061铝合金 T6热处理力学性能固溶处理人工时效

分类号：TG312

出版年,卷(期):页码：2022,47(4):227-234

摘要：

研究了T6热处理对成形后6061铝合金构件组织和力学性能的影响。在经过不同的T6热处理后，通过电子拉伸实验研究构件力学性能的变化规律，利用光学显微镜、扫描电子显微镜和X射线衍射仪对热处理温度和时间对组织结构的影响进行分析。结果表明，固溶处理的合金中存在β-Al5FeSi和Mg2Si相。固溶处理温度和时间对合金的拉伸性能及塑性有显著影响。随着固溶温度及时间的增加，在560 ℃固溶4 h时抗拉强度及塑性最好，分别为211.62 MPa和和38.3%；相对于人工时效保温时间，人工时效温度对合金的拉伸性能及塑性的影响更大，在170 ℃人工时效10 h时力学性能最好，屈服强度和抗拉强度分别为145.26和363.30 MPa，伸长率为18.32%。

The influence of T6 heat treatment on the microstructure and mechanical properties of 6061 aluminum alloy components after forming was studied. Then, after different T6 heat treatments, the change laws of mechanical properties for components were studied by electron tensile test, and the influences of heat treatment temperature and time on the microstructure were analyzed by optical microscope, scanning electron microscope and X-ray diffractometer. The results show that there are β-Al5FeSi and Mg2Si phases in the solution-treated alloy, and the solution treatment temperature and time have a significant effect on the tensile properties and plasticity of alloy. With the increasing of the solution temperature and time, the tensile strength and plasticity are the best (211.62 MPa, 38.3%) in the solution treatment(560 ℃, 4 h). However, compared with the artificial aging holding time, the artificial aging temperature has a greater impact on the tensile properties and plasticity of alloy, the mechanical properties are the best under the artificial aging (170 ℃, 10 h), and the yield strength, tensile strength and elongation are 145.26, 363.30 MPa and 18.32%, respectively.

基金项目：

国家自然科学基金资助项目（51775520）

作者简介：白雪智（1995-），男，硕士研究生 E-mail：baixuezhi0415@163.com 通信作者：李国俊（1969-），男，硕士，教授级高工 E-mail：liguojun@126.com

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