冲制用7075-O态铝合金薄板的退火工艺  

Annealing process of 7075-O aluminum alloy sheet for stamping

作　　者：刘夙伟 郭宇航[2] Liu Suwei;Guo Yuhang(Department of Mechanical and Electrical Engineering,Jiangyin Polytechnic College,Jiangyin Jiangsu 214405,China;School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China)

机构地区：[1]江阴职业技术学院机电工程系,江苏江阴214405 [2]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《金属热处理》2020年第4期149-152,共4页Heat Treatment of Metals

摘　　要：采用力学性能测试和显微组织观察等方法,研究了Zn含量、退火温度和冷却速率对7075-O态铝合金组织与性能的影响。研究结果表明:随退火温度的升高,7075-O态铝合金板材的强度逐渐减小,伸长率先增大后减小;随冷却速率和Zn元素含量的增加,7075-O态铝合金板材强度逐渐增大,伸长率逐渐减小。为满足冲制用7075-O态铝合金薄板的性能要求,应选择Zn含量≤5. 6%,最佳退火工艺为410℃×3 h炉冷至100℃出炉空冷。Influence of Zn content,annealing temperature and cooling rate on mechanical properties and microstructure of 7075 aluminum sheet were studied by means of tensile test and microstructure observation. The results show that with the increase of annealing temperature,the strength of 7075-O aluminum alloy sheet decreases,and the elongation increases initially but then decreases. With the increase of Zn content and cooling rate,the strength of 7075-O aluminum alloy sheet increases gradually,and the elongation decreased. In conclusion,to meet the requirements of 7075-O aluminum alloy sheet for stamping,the comparatively ideal condition are w( Zn) ≤5. 6%,annealing at 410℃ for 3 h with furnace cooling to 100 ℃ and then air cooling.

关 键 词：7075铝合金 退火工艺 力学性能 Zn含量 

分 类 号：TG166.3[金属学及工艺—热处理]