690 MPa低合金高强钢焊接技术及接头组织研究进展  

Research Progress on Welding Technology and Joint Microstructure for 690 MPa Low-Alloy High-Strength Steel

作　　者：谢耿 张斌 刘海龙 沐卫东 蔡艳[2] XIE Geng;ZHANG Bin;LIU Hailong;MU Weidong;CAI Yan(China Road&Bridge Corporation,Beijing 100011,China;School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]中国路桥工程有限责任公司,北京100011 [2]上海交通大学材料科学与工程学院,上海200240

出　　处：《热加工工艺》2024年第17期8-12,19,共6页Hot Working Technology

基　　金：中国路桥工程有限责任公司高强钢结构桥梁建造关键技术研究项目(P2200004)。

摘　　要：屈服强度为690 MPa的低合金调质高强钢具有广阔的工程应用前景。该类调质高强钢焊接生产时易出现冷裂纹、热影响区软化或脆化,以及焊缝金属局部脆化问题。厘清高强钢组织演变原理,探索开发高效、高质焊接技术,是保证690 MPa调质高强钢在大型工程结构中安全应用的重要环节。本文调研了近年来围绕该类高强钢开展的焊接工艺优化和焊接新方法探索,总结了690 MPa调质高强钢焊接热影响区和焊缝金属组织演变的最新研究进展。The low-alloy high-strength tempering steel with yield strength of 690 MPa has broad engineering application prospects.Cold crack,softening or embrittlement of heat affected zone,and local embrittlement of weld metal are the common problems for the high-strength tempering steel during welding production.Understanding the microstructure evolution of high-strength steel and developing high-efficient and high-quality welding technology are important to ensure the safe application of 690 MPa high-strength steel in large engineering structures.The optimization of welding process and the exploration of new welding methods of the high-strength steel in recent years were investigated.The latest research progress on the microstructure evolution of heat affected zone and weld metal of 690 MPa high-strength steel was summarized.

关 键 词：调质高强钢 焊接工艺 相比例 软化 脆化 

分 类 号：TG442[金属学及工艺—焊接]