N80级ERW石油套管用钢连续冷却转变行为的研究

来源期刊：上海金属2011年第4期

论文作者：李睿鑫 王青峰 陈辉 贺飞 尚成嘉

文章页码：6 - 9

关键词：电阻焊； N80； 级石油套管； 连续冷却转变； 淬透性

Key words：ERW； N80 Grade Oil Casing Pipe； CCT； Hardenability

摘    要：采用Gleeble热模拟技术结合金相法对N80级ERW石油套管试制钢的连续冷却转变行为进行研究。试验表明,试制钢9#、10#试样在一般国内ERW焊管淬火冷却条件(20℃/s)下都无法获得完全马氏体组织,只有在≥50℃/s的高冷速条件下才能获得完全马氏体组织。10#试制钢的淬透性强于9#钢的。

Abstract: The characteristic of continuous cooling transformation of the experimental steel of N80 grade oil casing were studied by thermo mechanical simulator(Gleeble-3500).The results showed that the experimental steel of 9# and 10# could not transformed completely to martensite microstructure under the 20 ℃/s quenching condition of domestic ERW pipe welding.Only on the high cooling rate of above 50 ℃/s,the experimental steel could obtain whole martensite.The hardenability of the experimental steel 10# was stronger than that of 9#.