深冷处理对6201铝合金力学性能和导电率的影响  

Effect of cryogenic treatment on mechanical properties and electrical conductivity of 6201 aluminum alloy

作　　者：张志杰[1] 陈峙 闫献国[1] 牛雪梅[1] 景林旺 原海芳 卫钟可 Zhang Zhijie;Chen Zhi;Yan Xianguo;Niu Xuemei;Jing Linwang;Yuan Haifang;Wei Zhongke(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China;Shanxi Aerospace Qinghua Equipment Co.,Ltd.,Changzhi Shanxi 046012,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]山西航天清华装备有限责任公司,山西长治046012

出　　处：《金属热处理》2024年第10期31-37,共7页Heat Treatment of Metals

基　　金：山西省自然科学基金(202103021224280);中国航天科技集团有限公司第一研究院基础前沿自主研发基金(2022)。

摘　　要：采用正交试验方法研究了深冷处理对6201铝合金拉伸性能及导电率的影响。结果表明,通过降温速率为1℃/min,深冷温度为-120℃,保温时间为12h,循环次数为2次的深冷处理,6201铝合金的抗拉强度为399.3MPa,相比于未深冷处理提升了17.96%。通过降温速率为5℃/min,试验温度为-196℃,保温时间为12h,循环次数为1次的深冷处理,6201铝合金的导电率为48.38%IACS,相比于未深冷处理提升了1.75%。深冷处理主要通过影响析出相大小、数量及分布均匀性来影响合金拉伸性能及导电率,深冷处理还通过影响空位变化进一步影响导电率。Effect of cryogenic treatment on the tensile properties and electrical conductivity of 6201 aluminum alloy was investigated using orthogonal test methods.The results show that the tensile strength of the 6201 aluminum alloy is 399.3 MPa through the cryogenic treatment with cooling rate of 1℃/min,cryogenic temperature of-120℃,holding time of 12 h and cycles number of 2 times,which is improved by 17.96%relative to the untreated group.Through the cryogenic treatment with cooling rate of 5 C/min,cryogenic temperature of-196℃,holding time of 12 h and cycles number of 1 time,the electrical conductivity of the 6201 aluminum alloy is 48.38%IACS,improved by 1.75%relative to the untreated group.The cryogenic treatment mainly affects the tensile properties and electrical conductivity of the alloy by influencing the size,number and distribution uniformity of the precipitated phases,and the cryogenic treatment further affects the electrical conductivity by influencing the vacancy changes.

关 键 词：6201铝合金 深冷处理 力学性能 导电率 

分 类 号：TG156.91[金属学及工艺—热处理] TG146.2[金属学及工艺—金属学]