Nb－V－Ti微合金钢双面埋弧焊热影响区组织和韧性  

Microstructure and Toughness of HAZ of Nb-V-Ti Microalloyed Steel after Double-side Submerged Arc welding

作　　者：彭云[1] 许祖泽[1] 陈钰珊[1] 

机构地区：[1]冶金部钢铁研究总院,宝山钢铁总厂

出　　处：《焊管》1995年第5期3-6,22,共5页Welded Pipe and Tube

摘　　要：研究了Ｎｂ—Ｖ—Ｔｉ微合金钢经不同焊接热循环后的组织和韧性。研究结果表明，Ｎｂ－Ｖ—Ｔｉ微合金钢母材组织为细小Ｆ＋Ｐ，经１３２０℃、１３２０℃＋１３２０℃热循环后组织为Ｂ十少量（Ｐ＋Ｆ），经１３２０℃＋７８０℃热循环后组织为Ｂ十少量（Ｐ＋Ｆ）十少量Ｍ—Ａ组元。经三种热循环后韧性有较大下降，以１３２０℃十７８０℃热循环后韧性最低。In this paper microstructure and toughness of Nb-V-Ti microalloyed steel after different thermal cycle are studied.Research results indicate that microstructure of Nb-V-Ti microalloyed steel is fine F+P,microstructure is B+a little (P+F) after 1320℃ and 1320℃+1320℃ thermal cycle, microstructure is B+a little(P+F) +a little M-A after 1320℃+780℃ thermal cycle. Toughness decreases in a great deal after thethree kinds thermal cycle.Toughness is the lowest after 1320℃+780℃ thermal cycle.

关 键 词：微合金钢 管道钢管 韧性 螺旋焊管 埋弧焊 组织 

分 类 号：TG445[金属学及工艺—焊接]