奥氏体化过程对Cr14Mo4V高温轴承钢微观组织的影响

doi:10.13251/j.issn.0254-6051.2022.08.002

金属热处理 ›› 2022, Vol. 47 ›› Issue (8): 7-15.DOI: 10.13251/j.issn.0254-6051.2022.08.002

奥氏体化过程对Cr14Mo4V高温轴承钢微观组织的影响

周丽娜, 刘明, 高翔, 王文雪, 童锐

中国航发哈尔滨轴承有限公司, 黑龙江哈尔滨 150025

收稿日期:2022-03-19 修回日期:2022-06-02 出版日期:2022-08-25 发布日期:2022-09-19
作者简介:周丽娜(1987—), 女, 工程师,博士,主要研究方向为航空轴承材料热处理技术,E-mail:zhoulina626@126.com。
基金资助:
军委科技委基础加强计划(2020-JCJQ-ZD-155-12)

Effect of austenitizing process on microstructure of Cr14Mo4V high temperature bearing steel

Zhou Lina, Liu Ming, Gao Xiang, Wang Wenxue, Tong Rui

AECC Harbin Bearing Co., Ltd., Harbin Heilongjiang 150025, China

Received:2022-03-19 Revised:2022-06-02 Online:2022-08-25 Published:2022-09-19

摘要/Abstract

摘要： 针对高温轴承钢Cr14Mo4V开展了微观组织随奥氏体化参数演化规律研究。利用OM、XRD、SEM及硬度测试对Cr14Mo4V钢中碳化物、残留奥氏体、晶粒尺寸及硬度等进行了分析。结果表明,淬火态Cr14Mo4V高温轴承钢微观组织主要包括淬火马氏体、残留奥氏体和带状碳化物;奥氏体化过程中微观组织演化对奥氏体化温度较为敏感,随着奥氏体化温度的升高,残留奥氏体含量逐渐增加,晶粒尺寸逐渐增大,碳化物逐渐溶解,带状碳化物合金元素分布发生变化。Cr14Mo4V轴承钢硬度随奥氏体化温度的升高呈先略微增加后显著降低的趋势,主要受基体固溶度、残留奥氏体含量及晶粒尺寸等因素综合影响。

关键词: Cr14Mo4V轴承钢, 奥氏体化, 残留奥氏体, 碳化物, 硬度

Abstract: Evolution of microstructure with austenitizing parameters of the high temperature bearing steel Cr14Mo4V was studied. The carbides, retained austenite, grain size and hardness of the Cr14Mo4V steel were analyzed by means of OM, XRD, SEM and hardness test. The results show that the microstructure of the quenched high temperature Cr14Mo4V bearing steel mainly includes quenched martensite, retained austenite and band-shaped carbides. The microstructure evolution process is more sensitive to the austenitizing temperature. The content of retained austenite gradually increases with the increase of austenitizing temperature, and the same trend to grain size, the carbides gradually dissolve, and the distribution of alloying elements of band-shaped carbides changes. The hardness of the Cr14Mo4V bearing steel increases slightly at first and then decreases significantly with the increase of austenitizing temperature, which is mainly affected by matrix solid solubility, retained austenite content and grain size.

Key words: Cr14Mo4V bearing steel, austenitizing, retained austenite, carbides, hardness

中图分类号:

TG142.4

周丽娜, 刘明, 高翔, 王文雪, 童锐. 奥氏体化过程对Cr14Mo4V高温轴承钢微观组织的影响[J]. 金属热处理, 2022, 47(8): 7-15.

Zhou Lina, Liu Ming, Gao Xiang, Wang Wenxue, Tong Rui. Effect of austenitizing process on microstructure of Cr14Mo4V high temperature bearing steel[J]. Heat Treatment of Metals, 2022, 47(8): 7-15.

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奥氏体化过程对Cr14Mo4V高温轴承钢微观组织的影响

Effect of austenitizing process on microstructure of Cr14Mo4V high temperature bearing steel

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