摘要
针对AF1410钢电子束焊接接头,分析焊缝区、热影响区、母材区的微观组织,测试并研究各微区的电化学性能以及接头在3.5%(质量分数)NaCl溶液中的腐蚀行为。研究表明:焊缝区、热影响区、母材区的微观组织及电化学性能互相之间均存在明显差异,热影响区的自腐蚀电位最低,母材区的自腐蚀电位最高;未经热处理的AF1410钢电子束焊接接头热影响区最容易发生腐蚀,腐蚀以热影响区为中心向焊缝区和近缝母材扩展;适宜的热处理可提高AF1410钢电子束焊接接头的耐腐蚀性能。
As for electron beam welded joints of AF1410 steel,the microstructural features within weld zone,heat affected zone and base metal were studied,and their corresponding electrochemical properties were tested.In addition,the corrosion behavior of AF1410 joints in 3.5%NaCl solution was examined.The results show that the microstructural features and electrochemical properties within the three zones exhibit a significant difference.The lowest self-corrosion potential was observed within heat affected zone while the highest within base metal.The heat affected zone of the electron beam welded joints without heat treatment is most likely to be corroded.The corrosion initiates from the heat affected zone and then extends to the weld zone and the base metal near fusion line.Appropriate heat treatment can improve the corrosion resistance of the electron beam welded joints of AF1410 steel.
作者
李凯
付鹏飞
麻彦龙
刘凯歌
靳磊
LI Kai;FU Peng-fei;MA Yan-long;LIU Kai-ge;JIN Lei(Department of Surface Engineering Technologies,AVIC Manufacturing Technology Institute,Beijing 100024,China;Science and Technology on Power Beam Processes Laboratory,AVIC Manufacturing Technology Institute,Beijing 100024,China;College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China)
出处
《失效分析与预防》
2021年第2期89-97,共9页
Failure Analysis and Prevention
基金
中国航空工业集团材料能力建设项目(KZ521906144)
中国航空制造技术研究院基金(KS911608114)。
关键词
AF1410钢
电子束焊接
腐蚀
电化学性能
微观组织
AF1410 steel
electron beam welding
corrosion
electrochemical properties
microstructure
