李亚欣,刘雅政,周乐育,李阳华,邹喜洋

• 1:北京科技大学材料科学与工程学院
• 2:北京科技大学中冶技术发展有限公司
• 3:衡阳华菱钢管(集团)有限公司技术中心

摘要(Abstract)：

建立了石油套管在淬火冷却过程中温度、应力场的三维非线性热力耦合有限元模型,并分析了温度、应力场的变化规律和分布状态。模拟结果表明:冷却过程中,轴截面沿径向的温差先增加后减小,冷却2.5 s时,温差最大为274℃。冷却至5.5 s时,外表面首先开始发生马氏体转变;当冷却至11.5 s时,套管整体温度≤280℃,几乎完成了马氏体转变。套管切向应力对套管影响作用最明显,在冷却初期,热应力作用使切向应力随温差增大而升高,减小而降低;发生组织转变后,热应力和组织应力共存,随冷却进行切向应力迅速升高,至7.5 s达到最大为561 MPa;完成组织转变后,只有热应力存在,随冷却进行温差减小切向应力亦降低。

关键词(KeyWords)： 有限元;石油套管;淬火过程;耦合场

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李亚欣,刘雅政,周乐育,李阳华,邹喜洋

DOI: 10.13289/j.issn.1009-6264.2011.01.029

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