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.
出处
《焊管》
1995年第5期3-6,22,共5页
Welded Pipe and Tube
关键词
微合金钢
管道钢管
韧性
螺旋焊管
埋弧焊
组织
microalloyed steel pipeline steel pipe compositional analysis toughness
