呼陟宇,韩锦峰,孟佳红,毕向荣,孙文彬,王海燕,高雪云

• 1:内蒙古科技大学材料与冶金学院
• 2:中国机械总院集团北京机电研究所有限公司
• 3:内蒙古科技大学理学院

摘要(Abstract)：

淬火工艺对大尺寸厚壁钢管淬火过程中组织和残余应力有很大影响。通过数值模拟研究了30Cr2NiMo钢管经过不同工艺淬火后的温度、组织和残余应力的分布情况。结果表明：大尺寸厚壁钢管淬火后内应力主要集中在台阶处，可达600 MPa左右，在传统淬火过程中空冷一段时间，可以在保证组织与常规油淬基本相同的前提下，降低台阶处的内应力，将内应力最大值控制在500 MPa以内，降低了钢管淬火开裂的倾向。根据模拟结果得出本试验条件下30Cr2NiMo钢管优化后的淬火工艺为：油淬420 s+空冷480 s+油淬，淬火后钢管的细管处的组织为马氏体组织，粗管处表面为马氏体+残留奥氏体组织，心部主要为马氏体+贝氏体+残留奥氏体组织。

关键词(KeyWords)： 30Cr2NiMo钢;大尺寸厚壁钢管;淬火工艺;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 内蒙古自然科学基金(2020BS05006);; 内蒙古科技大学创新基金项目(2019QDL-B09)

作者(Author): 呼陟宇,韩锦峰,孟佳红,毕向荣,孙文彬,王海燕,高雪云

DOI: 10.13289/j.issn.1009-6264.2022-0589

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