7075铝合金T73双级过时效工艺研究

发布时间：2018-01-15 04:22

  本文关键词：7075铝合金T73双级过时效工艺研究　出处：《世界有色金属》2016年20期 　论文类型：期刊论文

  更多相关文章： 铝合金 双级时效 硬度 电导率

【摘要】：对7075铝合金进行了不同工艺下的T73双级过时效处理,通过硬度、电导率和拉伸性能测试对比研究了双级时效对合金力学性能的影响。结果表明,随着第二级时效时间的延长,合金硬度逐渐降低,电导率明显增加。第一级温度较低时,随着第一级时效时间的延长,合金硬度有微量上升,电导率下降;而第一级温度较高时,随着第一级时效时间的延长,合金硬度有微量下降,电导率上升。最终获得了7075合金最优的T73双级过时效工艺为107℃X6h+177℃X8h,其抗拉强度可达到500.5Mpa,屈服强度达到424Mpa,延伸率为12.75%。
[Abstract]:The effect of two-stage aging on mechanical properties of 7075 aluminum alloy was studied by means of hardness, electrical conductivity and tensile properties. With the prolongation of the second stage aging time, the hardness of the alloy decreases gradually and the electrical conductivity increases obviously. When the first stage temperature is low, the hardness of the alloy increases slightly and the electrical conductivity decreases with the prolongation of the first stage aging time. However, when the first stage temperature is higher, the hardness of the alloy decreases slightly with the prolongation of the first stage aging time. Finally, the optimum T73 two-stage overaging process of 7075 alloy is 107 鈩，

本文编号：1426773