时效处理对含Sc的6005A合金微观组织和腐蚀性能的影响  

Effect of Aging Treatment on Microstructure and Corrosion Properties of 6005A Alloy Containing Sc

作　　者：刘亦晨 潘清林[1,2] 刘竝 梁美婵 黎家行 LIU Yichen;PAN Qinglin;LIU Bing;LIANG Meichan;LI Jiaxing(School of Materials Science and Engineering,Central South University,Changsha 410083,China;Light Alloy Research Institute,Central South University,Changsha 410083,China;Guang Dong Wei Ye Aluminum Factory Group,Co.,Ltd.,Foshan 528000,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]中南大学轻合金研究院,湖南长沙410083 [3]广东伟业铝厂集团有限公司,广东佛山528000

出　　处：《热加工工艺》2024年第18期19-23,29,共6页Hot Working Technology

基　　金：佛山市南海区重点领域科技攻关资助项目(2230032004640)。

摘　　要：通过拉伸测试、晶间腐蚀测试、金相、扫描电镜及透射电镜观察研究了人工时效对含Sc的6005A合金微观组织、力学性能以及晶间腐蚀性能的影响。结果表明,添加Sc可以有效的提升峰时效态6005A合金的拉伸性能(抗拉强度、屈服强度和伸长率分别可达366 MPa、334 MPa、15.4%),扫描断口呈塑性断裂特征。时效初期,晶间腐蚀敏感性随时效时长的增加而增加,直到峰时效晶间腐蚀敏感性达到最大,随后晶间腐蚀敏感性减弱。The effects of artificial ageing on the microstructure and mechanical properties and intergranular corrosion properties of 6005A alloy containing Sc were investigated by tensile testing,intergranular corrosion testing,metallography,scanning electron micrography and transmission electron micrography.The results show that the addition of Sc can effectively improve the tensile properties(tensile strengths,yield strengths and elongation up to 366 MPa,334 MPa and 15.4%,respectively)of the peak-aged 6005A alloy,and the scanned fractures show plastic fracture characteristics.At the beginning of aging,the intergranular corrosion susceptibility increases with increasing aging time until the peak aging intergranular corrosion susceptibility reaches its maximum,and then the intergranular corrosion susceptibility decreases.

关 键 词：6005A合金 SC 晶间腐蚀 微观组织 

分 类 号：TG166.3[金属学及工艺—热处理]