焊接热循环过程对调质Q890D钢板性能和组织的影响  

Effects of Welding Thermal Cycling Process on Properties and Microstructure of Q890D Quenched and Tempered Steel Plate

作　　者：王丽敏 周骞 吕德文 孙电强 王会岭 Wang Limin;Zhou Qian;LüDewen;Sun Dianqiang;Wang Huiling(School of Materials Science and Engineering,Hebei University of Engineering;Technology Center of HBIS Group Hansteel Company;Science and Technology Dept.of HBIS Group Wusteel Company)

机构地区：[1]河北工程大学材料科学与工程学院 [2]河钢集团邯钢公司技术中心 [3]河钢集团舞钢公司科技部

出　　处：《宽厚板》2021年第2期40-42,共3页Wide and Heavy Plate

摘　　要：通过焊接热模拟试验,研究调质高强钢Q890D在不同冷却速度条件下的冲击性能和组织形貌。结果表明:Q890D高强钢焊接热影响区过热区的组织为马氏体和贝氏体,贝氏体含量随着t_(8/5)的增大呈增加趋势,-20℃冲击功随着t_(8/5)的增大呈现先增加后减小的趋势,当t_(8/5)为20 s时,低温冲击性能最好。By taking welding thermal simulation tests,the impact properties and microstructure morphology of quenched and tempered high strength steel Q890D under different cooling rates are studied.The results show that the microstructure at overheated zone of welded heat affect zone of Q890D high strength steel comprises of martensite and bainite,the bainite content increases with the rising of t_(8/5),-20℃impact energy values show the tendency of first increase and then decrease with the rising of t_(8/5),the steel is of best low temperature properties when t_(8/5)is 20 s.

关 键 词：调质 Q890D 焊接性能 焊接热循环 

分 类 号：TG457.11[金属学及工艺—焊接]