7A05铝合金自由锻造工艺及锻件力学性能研究  

Research on free forging process and mechanical property of 7A05 aluminum alloy

作　　者：张广明[1] 成建国[1] 朱秀荣[1] 赵国田[1] 王冬生[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《兵器材料科学与工程》2009年第3期59-62,共4页Ordnance Material Science and Engineering

摘　　要：为得到高性能7A05铝合金锻件,对铸造毛坯制备、锻件制备和锻件热处理进行试验研究。采用半连续铸造工艺制备铸造毛坯,铸造温度为705～710℃,冷却水压为0.05 MPa,铸造速度为50 mm/min;采用一次镦粗加一次拔长锻造工艺,终锻温度为330℃,εZ=87.7%;锻件采用固溶加时效热处理,固溶为(480±5)℃×2 h+水淬,时效为80℃×8 h+120℃×24 h。观察锻件的金相组织并测试其力学性能,锻件微观组织为变形纤维组织,横向力学性能Rm=400 MPa,Rp0.2=360 MPa,A=11%,锻件力学性能与板材力学性能相当。In order to obtain fine property of 7A05 aluminum alloy forging, preparation of cast blank, preparation of forging and heat treatment of forging were experimented and researched. Cast blank was prepared by semi-continuous casting technology with casting temperature of 705-710 ℃, cooling water pressure of 0.05 MPa and casting speed of 50 mm/min. The forging process includes once upsetting and once drawing-out with finish forging temperature of 330 ℃ and εz of 87.7%. The solution treatment of forging is （480±5） ℃×2 h＋water quenching. The artificial aging is 80 ℃×8 h＋120 ℃×24 h. We observed microstructure and tested mechanical property of forging. The results show that 7A05 aluminum alloy forging has deformation fabric-structure with enhanced mechanical properties＇. Transverse direction mechanical properties are Rm=400 MPa, Rp02=360 MPa, A=11%, which are similar with that of plate.

关 键 词：7A05铝合金 自由锻造工艺 力学性能 微观组织 

分 类 号：TG31[金属学及工艺—金属压力加工]