金属热处理 ›› 2025, Vol. 50 ›› Issue (5): 107-110.DOI: 10.13251/j.issn.0254-6051.2025.05.017

• 材料研究 • 上一篇    下一篇

铝、氮含量对22CrMoH齿轮钢淬透性的影响

胡芳忠, 汪开忠, 王雅倩, 尹德福, 陈世杰, 金国忠, 杨志强   

  1. 马鞍山钢铁股份有限公司 技术中心, 安徽 马鞍山 243000
  • 收稿日期:2024-11-19 修回日期:2025-03-13 发布日期:2025-06-25
  • 作者简介:胡芳忠(1984—),男,高级工程师,博士,主要研究方向为特殊钢产品开发,E-mail:fangzhonghu@126.com。
  • 基金资助:
    2023年省重点研发计划高新领域立项项目(202304a05020082)

Effect of Al and N contents on hardenability of 22CrMoH gear steel

Hu Fangzhong, Wang Kaizhong, Wang Yaqian, Yin Defu, Cheng Shijie, Jin Guozhong, Yang Zhiqiang   

  1. Technical Center, Maanshan Iron & Steel Co., Ltd., Maanshan Anhui 243000, China
  • Received:2024-11-19 Revised:2025-03-13 Published:2025-06-25

摘要: 采用末端淬火试验(Jominy试验)研究了Al、N含量对22CrMoH齿轮钢淬透性的影响。结果表明,不同Al、N含量对22CrMoH齿轮钢本质晶粒度和末端淬火时的实际晶粒度影响不明显,但自由Al含量对22CrMoH齿轮钢淬透性有明显影响。当自由Al含量≤0.018%时,对试验钢淬透性影响较小;当自由Al含量从0.018%增加至0.020%时,试验钢淬透性急剧提高,J5~J25点硬度值提高幅度达到5 HRC以上;随着自由Al含量进一步提高,试验钢淬透性稍有提高。因此,为获得窄淬透性带宽的22CrMoH齿轮钢,可通过调整Al、N含量使自由Al含量≤0.018%或≥0.020%。

关键词: 22CrMoH齿轮钢, 淬透性, 合金元素, 自由铝

Abstract: Effect of Al and N contents on hardenability of 22CrMoH gear steel was studied by Jominy test. The results show that different Al and N contents have no obvious effect on the inherent grain size and the actual grain size of the 22CrMoH gear steel during end quenching, but the free Al content has obvious effect on hardenability of the 22CrMoH gear steel. When the content of free Al is less than or equal to 0.018%, the effect of free Al content on hardenability of the tested steel is small; when the content of free Al increases from 0.018% to 0.020%, hardenability of the tested steel increases sharply, and the hardness values from J5 to J25 points are increased by more than 5 HRC; with the further increase of free Al content, hardenability of the tested steel increases slightly. Therefore, in order to obtain the 22CrMoH gear steel with narrow hardenability bandwidth, the free Al content should be ≤0.018% or ≥0.020% by adjusting the Al and N contents.

Key words: 22CrMoH gear steel, hardenability, alloy element, free aluminum

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