李辉,米振莉,赵奇,代永娟,王文武

• 1:烟台南山学院工学院
• 2:北京科技大学冶金工程研究院
• 3:河北科技大学材料学院

摘要(Abstract)：

从热力学角度计算了实验钢贝氏体相变温度,分析了不同温度贝氏体相变规律,揭示了相变过程残留奥氏体的稳定性,提出了一种两步短时贝氏体处理方法。实验结果表明:贝氏体相变的鼻尖温度在300~350℃之间,综合考虑相变时间和硬度,选取250℃进行等温处理为最佳工艺;在250℃保温20 min时,存在残留奥氏体含量的最大值,保温时间大于20 min后其稳定性提高,在后续的冷却过程中不发生马氏体相变;在250℃等温处理50 min后升温到270℃保温5 min,相变时间为传统工艺的27%左右,显著缩短贝氏体相变时间的同时并未明显降低硬度和磨损性能。

关键词(KeyWords)： 轴承钢;贝氏体相变;残留奥氏体;热处理

Abstract:

Keywords:

基金项目(Foundation): 国家863项目(2012AA03A508);; 国家自然科学基金(51101048);; 河北省钢铁联合基金(E2013208131)

作者(Author): 李辉,米振莉,赵奇,代永娟,王文武

DOI: 10.13289/j.issn.1009-6264.2016.02.021

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