摘要
选取Q460低合金高强钢及其埋弧焊焊接接头,采用金相显微镜、扫描电子显微镜(SEM)、能谱仪(EDS)和显微硬度计等测试手法研究焊缝组织及性能;通过电化学极化曲线的测试研究焊缝腐蚀行为。试验结果表明,焊缝组织为针状铁素体和珠光体,经过淬火加高温回火后的焊缝晶粒最为细小;焊缝的硬度大于母材的硬度;焊缝的抗腐蚀性能低于母材,在质量分数为3.5%的NaCl腐蚀环境下,较于同为低合金高强钢的Q510和Q345,Q460焊缝耐腐蚀性也略差。
Q460 high strength low alloy steel and its submerged arc welded joints were chosen to study microstructure and properties of weld by metallographic microscope,scanning electron microscope(SEM),energy dispersive spectrometry(EDS)and microhardness tester.Corrosion behavior of weld was studied by electrochemical polarization curve test.The experimental results showed that microstructure of weld was needle-like ferrite and pearlite,grains of weld were the finest after quenching and high temperature tempering.Hardness of weld was greater than that of parent material.Corrosion resistance of weld was lower than that of parent material.Corrosion resistance of Q460 weld was slightly worse than that of Q510 and Q345 high strength low alloy steel in the corrosion environment NaCl with a mass fraction of 3.5%.
作者
纪建奕
路海涛
肖浚艺
潘家敬
Ji Jianyi;Lu Haitao;Xiao Junyi;Pan Jiajing(Qingte Group Co.,Ltd.,Qingdao 266106,Shandong,China;Qingdao University of Science and Technology,Qingdao 266061,Shandong,China)
出处
《焊接》
北大核心
2023年第6期24-30,43,共8页
Welding & Joining
基金
中国博士后科学基金资助项目(2021M691703)
青岛科技大学科研启动基金项目(12030430010674)。
关键词
低合金高强钢
埋弧焊
焊缝组织
电化学腐蚀
high strength low alloy steel
submerged arc welding
microstructure of weld
electrochemical corrosion
作者简介
第一作者:纪建奕,硕士,高级工程师,主要从事汽车车桥设计及制造方向的研究,qtjsglb@qingtegroup.com;通信作者:潘家敬,博士,副教授,主要从事厚板焊接、熔覆工艺及数值仿真的研究,panjiajing1234@tju.edu.cn。
