谢章龙,陈俊,刘振宇,王国栋

• 1:东北大学轧制技术及连轧自动化国家重点实验室

摘要(Abstract)：

研究了直接双相区热处理工艺的保温时间和回火时间对9Ni钢组织性能的影响。结果表明:在相同回火条件下,保温时间为40 min时低温韧性最好,少于Quenching+Lamellarizing+Tempering(QLT)工艺中双相区保温所需时间;保温时间为20 min时,强度增加但低温韧性降低;保温时间过长(60 min)会导致组织粗化、低温韧性差,延长回火时间低温冲击功也基本不变。保温时间为40 min时,随着回火时间的增加,回转奥氏体增加,抗裂纹扩展能力增强,低温冲击功增加,但强度降低,这主要归因于回转奥氏体在板条束间的析出和对马氏体中C及其它有害元素的净化作用。

关键词(KeyWords)： 9Ni钢;在线热处理;淬火;组织性能

Abstract:

Keywords:

基金项目(Foundation): 国家“863”项目(2007AA03Z504)

作者(Author): 谢章龙,陈俊,刘振宇,王国栋

DOI: 10.13289/j.issn.1009-6264.2011.05.014

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