激光焊接异种钢接头微观结构及耐蚀性
Microstructure and corrosion resistance of laser welded joints for dissimilar steels
景财年 1范吉超 1王华 2徐淑波 1刘鹏1
作者信息
- 1. 山东建筑大学材料科学与工程学院,山东济南250101
- 2. 上海大学分析测试中心,上海200444
- 折叠
摘要
对TRIP590钢和DP590钢拼焊板的接头区域进行了微观组织以及成分分析,并利用电化学方法测试J了焊接接头各区域的塔菲尔曲线,研究接头各区域之间的组织、成分与腐蚀行为之间的关系.结果表明,焊缝区组织较均匀,两侧热影响区组织差别较大;Si和Mn在焊缝有一定的聚集;焊缝区的电极电位比两侧母材的都低,腐蚀电流密度相差不人,说明焊缝区耐蚀性低于母材;由于焊接热循环导致显微组织变化,焊缝区显微硬度明显比两侧母材高.
Abstract
Microstructure and component analysis of joints of TRIP590 and DP590 tailor welded sheets was studied.The Tafel curves of the welded joints were tested by electrochemical method.The relationship between microstructure,component and corrosion behavior of welded joints were analyzed.The results indicate that microstructure of weld zone is uniform while that of the HAZ is different.Si and Mn are gathered in welded zone.The electrode potential of welded joints is lower than that of base metal and the corrosion ampere density is similar,which indicated the corrosion resistance of melt zone is lower than that of the base material.The microhardness of weld zone is significant higher than that of the base metal due to the change of microstructure on account of welding thermal circle.
关键词
拼焊板/异种钢/显微组织/电化学/元素分布Key words
tailor welded sheets/dissimilar steels/microstructure/electrometric/elements distribution引用本文复制引用
基金项目
国家自然科学基金(51305240)
山东省科技发展计划(2013GGX10306)
出版年
2015
NETL
NSTL
维普
万方数据