金属热处理 ›› 2025, Vol. 50 ›› Issue (7): 1-9.DOI: 10.13251/j.issn.0254-6051.2025.07.001

• 表面工程 •    下一篇

GCr15钢的碳氮共渗工艺参数及其对微观组织与性能的影响

龚雪玲1, 顾剑锋1, 王婧1, 袁志钟2, 王琴3, 史有森3   

  1. 1.上海交通大学 材料科学与工程学院, 上海 200240;
    2.江苏大学 材料科学与工程学院, 江苏 镇江 212013;
    3.江苏丰东热技术有限公司, 江苏 盐城 224100
  • 收稿日期:2025-02-10 修回日期:2025-05-14 出版日期:2025-07-25 发布日期:2025-07-28
  • 通讯作者: 袁志钟(1977—),男,副教授,博士,E-mail:yzzis@ujs.edu.cn
  • 作者简介:龚雪玲(2001—),女,硕士研究生,主要研究方向为轴承钢的热处理工艺,E-mail:Shirley.g@sjtu.edu.cn。
  • 基金资助:
    国家自然科学基金(52203379);国家重点研发计划(2023YFB3408001)

Carbonitriding parameters and their effects on microstructure and properties of GCr15 steel

Gong Xueling1, Gu Jianfeng1, Wang Jing1, Yuan Zhizhong2, Wang Qin3, Shi Yousen3   

  1. 1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. School of Materials Science and Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China;
    3. Jiangsu Fengdong Thermal Technology Co., Ltd., Yancheng Jiangsu 224100, China
  • Received:2025-02-10 Revised:2025-05-14 Online:2025-07-25 Published:2025-07-28

摘要: 研究了气体碳氮工艺的共渗温度、氨气流量以及回火温度对GCr15钢微观组织、硬度、耐磨性和回火稳定性的影响。结果表明:随着碳氮共渗温度的升高,GCr15钢的硬度逐渐提高,在880 ℃进行碳氮共渗时表面硬度可达730 HV5,比在800 ℃下进行碳氮共渗的表面硬度高90 HV5;随着氨气流量的增大,GCr15钢的表面硬度逐渐降低,在0.25 m3/h下进行碳氮共渗的表面硬度为785 HV5,比1.00 m3/h下的表面硬度高75 HV5;碳氮共渗温度的升高或氨气流量的增加都能提高GCr15钢的耐磨性;随着回火温度的升高,GCr15钢碳氮共渗层的硬度下降幅度变小。

关键词: 轴承钢, 碳氮共渗, 显微组织, 硬度, 耐磨性

Abstract: Effects of gas carbonitriding temperature, ammonia flow rate and tempering temperature on microstructure, hardness, wear resistance and tempering stability of GCr15 steel were investigated. The results show that the hardness of the GCr15 steel gradually increases with the increase of carbonitriding temperature, and the surface hardness can reach 730 HV5 when carbonitriding at 880 ℃, which is 90 HV5 higher than that of carbonitriding at 800 ℃. The surface hardness of the GCr15 steel gradually decreases with the increase of ammonia flow rate. The surface hardness is 785 HV5 when carbonitriding at 0.25 m3/h, which is 75 HV5 higher than that of carbonizing at 1.00 m3/h. The increase of the carbonitriding temperature or the flow of ammonia will increase the wear resistance of the GCr15 steel. The decrease range of the carbonized layer hardness of the GCr15 steel is less with the increase of tempering temperature.

Key words: bearing steel, carbonitriding, microstructure, hardness, wear resistance

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