Al、N微合金化22CrMoH齿轮钢渗碳前的预备热处理

doi:10.13251/j.issn.0254-6051.2025.12.038

金属热处理 ›› 2025, Vol. 50 ›› Issue (12): 245-253.DOI: 10.13251/j.issn.0254-6051.2025.12.038

Al、N微合金化22CrMoH齿轮钢渗碳前的预备热处理

刘林凤¹, 申长阳¹, 吴奇², 贾涛¹

1.东北大学轧制技术及连轧自动化国家重点实验室, 辽宁沈阳 110819;
2.汉德车桥(株洲)齿轮有限公司, 湖南株洲 412007

收稿日期:2025-09-18 修回日期:2025-11-07 发布日期:2026-01-06
通讯作者: 贾涛,副教授,博士,E-mail: jiatao@ral.neu.edu.cn
作者简介:刘林凤(2000—),女,硕士研究生,主要从事钢的组织性能调控,E-mail:f1649658719@163.com。

Pre-heat treatment before carburizing of Al and N microalloyed 22CrMoH gear steel

Liu Linfeng¹, Shen Changyang¹, Wu Qi², Jia Tao¹

1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang Liaoning 110819, China;
2. Hande Axle (Zhuzhou) Gear Co., Ltd., Zhuzhou Hunan 412007, China

Received:2025-09-18 Revised:2025-11-07 Published:2026-01-06

摘要/Abstract

摘要： 在常规22CrMoH齿轮钢的基础上设计了Al、N微合金化的22CrMoH齿轮钢,通过锻后冷却、余热正火的热模拟与试验,探究了Mo对AlN析出行为的影响以及Mo溶质拖曳与AlN钉扎的叠加效应对渗碳后奥氏体晶粒度的影响。工业验证试验表明,相比常规22CrMoH钢制造的齿轮,采用Al、N微合金化设计可以使齿轮渗碳后心部晶粒度提升1~2级,渗碳表层硬度≥750 HV,渗层硬度梯度提高20~40 HV。

关键词: 22CrMoH齿轮钢, AlN的钉扎效应, Mo的溶质拖曳, 奥氏体晶粒尺寸, 渗碳

Abstract: On the basis of conventional 22CrMoH gear steel, Al, N microalloyed 22CrMoH steel gear steel was designed. Effects of Mo on the precipitation behavior of AlN, as well as the combined effect of Mo solute drag and AlN pinning effect on the austenite grain size of carburized gears were investigated through thermal simulation and tests involving cooling after forging and residual-heat normalizing. Results of industrial trials show that compared with conventional 22CrMoH gear steel, Al and N microalloying design can increase the grain size level of the core by 1-2 grades after carburizing, achieve the hardness of ≥750 HV at the carburized surface, and increase the hardness profile of the carburized layer by 20-40 HV.

Key words: 22CrMoH gear steel, pinning effect of AlN, solute drag of Mo, austenite grain size, carburizing

中图分类号:

TG161

刘林凤, 申长阳, 吴奇, 贾涛. Al、N微合金化22CrMoH齿轮钢渗碳前的预备热处理[J]. 金属热处理, 2025, 50(12): 245-253.

Liu Linfeng, Shen Changyang, Wu Qi, Jia Tao. Pre-heat treatment before carburizing of Al and N microalloyed 22CrMoH gear steel[J]. Heat Treatment of Metals, 2025, 50(12): 245-253.

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Al、N微合金化22CrMoH齿轮钢渗碳前的预备热处理

Pre-heat treatment before carburizing of Al and N microalloyed 22CrMoH gear steel

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