固溶时间对2A70合金组织和性能的影响  

Effect of the Solution Time on Microstructure and Properties of 2A70 Alloy

作　　者：牛禧[1] 黄光杰[1] 汪凌云[1] 黄光胜[1] 张所全[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《轻合金加工技术》2005年第6期49-52,共4页Light Alloy Fabrication Technology

基　　金：国防军工研究项目(技字外2003-6)

摘　　要：通过金相组织及透射电镜研究了不同固溶时间对2A70合金组织性能的影响。结果表明:固溶保温时间7h～9h可使合金得到最佳强化效果。析出的强化相均匀分布,可有效的阻止位错滑移,提高合金的强度。固溶保温时间过长会造成合金的晶粒长大,析出相间距增大,使合金力学性能急剧降低。The influence of different solution time to the microstructure and property of 2A70 alloy was investigated by optical microstructure and TEM. The results show that 2A70 alloy can be best strengthened when holding time is 7 to 9 hours .The dispersion of precipitation can effectively restrain slip and enhance the strength of 2A70 alloy. That under too long holding time would lead to the increasing grain size and the wide microstructure which decreases the property of 2A70 alloy drastically.

关 键 词：2A70合金 固溶强化时间 组织 性能 

分 类 号：TG156.94[金属学及工艺—热处理]