摘要
为验证补焊工艺对6005A-5083焊接接头的力学及耐蚀性能的影响,通过金相显微镜、扫描电镜、硬度计、慢应变速率拉伸试验机等仪器对焊接接头的微观组织及性能进行测试分析.结果表明:补焊前后,焊接接头的组织、硬度分布规律没有明显变化;焊缝区、5083基材侧热影响区、6005A侧热影响区的宽度分别为10,10,35 mm左右,且显微硬度上存在明显的软化区;补焊前后,焊接接头的抗拉强度、屈服强度及伸长率分别为181 MPa,115 MPa,7.2%及183 MPa,116 MPa,8.9%;经补焊后,接头的晶间腐蚀敏感性略有增加;补焊前后,焊接接头均未表现出明显的应力腐蚀敏感性.
To verify the effect of repair welding process on the mechanical and corrosion resistance of 6005A-5083 welded joint,the microstructure and properties of welded joint are analyzed by means of metallographic microscopy,scanning electron microscopy,hardness test and slow strain rate tensile test.The change in microstructure and hardness distribution of the welded joints is no obvious variation after repair welding.The widths of weld zone,the heat-affected zone(HAZ)adjacent to 5083 base metal,and the HAZ adjacent to 6005A base metal are about 10,10 and 35 mm,respectively.Besides,microhardness softening zone is obviously observed on both welded joints.Before and after repair welding,the tensile strength,yield strength and elongation of welded joints are 181 MPa,115 MPa,7.2%and 183 MPa,116 MPa,8.9%respectively.After repair welding,the intergranular corrosion sensitivity of the joint increases slightly.The joints present no obvious stress corrosion sensitivity before and after repair welding.
作者
龙敏浩
潘柏清
剡苏荣
丁浩
刘雄
王向东
王维裔
叶绩
LONG Minhao;PAN Baiqing;YAN Surong;DING Hao;LIU Xiong;WANG Xiangdong;WANG Weiyi;YE Ji(Manufacturing Center,CRRC Times Electric Co.,Ltd.,Zhuzhou 412001,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2022年第2期117-124,共8页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
中车株洲电力机车研究所有限公司研究项目资助(K10TZ20P0500)。
关键词
6005A-5083焊接接头
补焊
耐蚀性能
力学性能
6005A-5083 welded joints
repair welding process
corrosion behavior
mechanical properties
