SAE 5130H齿轮钢连续冷却过程中的相转变

doi:10.13251/j.issn.0254-6051.2025.08.002

金属热处理 ›› 2025, Vol. 50 ›› Issue (8): 8-13.DOI: 10.13251/j.issn.0254-6051.2025.08.002

SAE 5130H齿轮钢连续冷却过程中的相转变

钱超¹, 戴澳诚², 陈登武¹, 仝大明², 晏广华³, 张梅², 顾剑锋^2,4, 李传维^2,4

1.浙江嘉翔精密机械技术有限公司, 浙江湖州 313000;
2.上海交通大学材料科学与工程学院, 上海 200240;
3.山东交通学院工程机械学院, 山东济南 250357;
4.上海市激光制造与材料改性重点实验室, 上海 200240

收稿日期:2025-03-10 修回日期:2025-06-11 出版日期:2025-08-25 发布日期:2025-09-10
通讯作者: 李传维,副教授,博士,E-mail:li-chuanwei@sjtu.edu.cn
作者简介:钱超(1986—),男,高级工程师,学士,主要研究方向为高精密管材轧制工艺与装备,E-mail:qianchao@jiuli.com。
基金资助:
湖州市重点研发计划项目-新材料专项(2023ZD2026)

Phase transformation of SAE 5130H gear steel during continuous cooling

Qian Chao¹, Dai Aocheng², Chen Dengwu¹, Tong Daming², Yan Guanghua³, Zhang Mei², Gu Jianfeng^2,4, Li Chuanwei^2,4

1. Zhejiang Jiaxiang Precision Machinery Technology Co., Ltd., Huzhou Zhejiang 313000, China;
2. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
3. School of Construction Machinery, Shandong Jiaotong University, Jinan Shandong 250357, China;
4. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai 200240, China

Received:2025-03-10 Revised:2025-06-11 Online:2025-08-25 Published:2025-09-10

摘要/Abstract

摘要： 通过热膨胀试验、组织观察等方法系统研究了SAE 5130H齿轮钢连续冷却过程中的相变行为。结果表明,依据冷却过程中发生的相变类型,可将SAE 5130H钢在0.01~100 ℃/s冷速范围的相变行为分为4类。第一类为冷速在0.01~1 ℃/s之间时,冷却过程仅发生扩散型铁素体/珠光体相变。第二类为冷速为2 ℃/s时,冷却过程相继发生铁素体相变、贝氏体相变和马氏体相变,且组织存在残留奥氏体。第三类为冷速在5~10 ℃/s之间时,冷却过程发生贝氏体相变和马氏体相变,获得贝氏体+马氏体的混合组织。第四类为冷速≥20 ℃/s时,仅发生马氏体相变,因此获得全马氏体组织的淬火临界冷速为20 ℃/s。基于膨胀试验和组织观察结果,绘制了SAE 5130H钢的CCT曲线。

关键词: SAE 5130H齿轮钢, 相转变, CCT曲线

Abstract: Phase transformation behavior of SAE 5130H gear steel during continuous cooling was systematically studied by means of thermal dilatometric test and microstructure observation. The results show that the phase transformation behavior of the steel at cooling rate of 0.01-100 ℃/s can be divided into four categories according to the types of the transformation occurred during continuous cooling. The first category is only the diffused ferrite/pearlite transformation at cooling rate of 0.01-1 ℃/s. The second one is that the ferritic transformation, bainitic transformation and martensitic transformation occur successively at cooling rate of 2 ℃/s, and small amount of retained austenite is found in the microstructure. The third one is when the cooling rate is between 5 ℃/s and 10 ℃/s, bainitic and martensitic transformations occur during the cooling process, resulting in a mixed microstructure of bainite and martensite. The last one is that only martensite transformation occurs at cooling rate higher than 20 ℃/s, which is determined as the critical cooling rate during quenching for the purpose of obtaining full martensite. Finally, the CCT curve of the SAE 5130H steel is successfully drawn based on the results of thermal dilatometric test and microstructure observation.

Key words: SAE 5130H gear steel, phase transformation, CCT curve

中图分类号:

TG151.2

钱超, 戴澳诚, 陈登武, 仝大明, 晏广华, 张梅, 顾剑锋, 李传维. SAE 5130H齿轮钢连续冷却过程中的相转变[J]. 金属热处理, 2025, 50(8): 8-13.

Qian Chao, Dai Aocheng, Chen Dengwu, Tong Daming, Yan Guanghua, Zhang Mei, Gu Jianfeng, Li Chuanwei. Phase transformation of SAE 5130H gear steel during continuous cooling[J]. Heat Treatment of Metals, 2025, 50(8): 8-13.

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SAE 5130H齿轮钢连续冷却过程中的相转变

Phase transformation of SAE 5130H gear steel during continuous cooling

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