大线能量钢焊接技术研究现状  

Research Status of Welding Technologies for High-heat-input Steels

作　　者：倪志达 董博伦 蔡笑宇 林三宝[1] NI Zhida;DONG Bolun;CAI Xiaoyu;LIN Sanbao(Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin 150006,Heilongjiang,China)

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,黑龙江哈尔滨150006

出　　处：《鞍钢技术》2023年第6期22-26,50,共6页Angang Technology

摘　　要：大线能量用钢是一种微合金化钢,供货态多为正火或控轧控冷。目前390 MPa级别大线能量钢已在造船以及海洋工程中广泛应用。归纳了大线能量用钢在典型焊接热循环下的粗晶区分布特征,并对当前已有的应用于大线能量钢的焊接技术进行了总结。考察了常见的埋弧焊、气电立焊及窄间隙MAG焊条件下,大线能量钢焊接接头的力学性能。High-heat-input steel is a type of micro-alloyed steel,mostly delivered in normalized or TMCP state.At present,the 390 MPa grade high-heat-input steel has been widely used in ship-building and marine engineering projects.So the distribution characteristics of the coarse grain heat affected zone in high-heat-input steel joints under typical welding thermal cycles were summed up and the existing welding techniques which applied to these steels were summarized.After that the mechanical properties of high-heat-input steels welded joints by SAW,EGW and narrow gap MAG welding methods were investigated.

关 键 词：大线能量钢 大热输入焊接方法 窄间隙MAG焊 力学性能 

分 类 号：TG4[金属学及工艺—焊接]