Microstructure and fatigue properties of 17Cr2Ni2MoVNb gear steel after gas carburizing and low-pressure carburizing

被引：13
|
作者：
Xue, Yanjun [1 ]
Yan, Yongming [1 ]
Yu, Wenchao [1 ]
Dong, Mingzhen [1 ,2 ]
Shi, Jie [1 ]
Wang, Maoqiu [1 ]
机构：
[1] Cent Iron & Steel Res Inst Co Ltd, Beijing 100081, Peoples R China
[2] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 167卷
关键词：
Gear steel; Gas carburizing; Low-pressure carburizing; Microstructure; Fatigue properties; INDUCED MARTENSITIC-TRANSFORMATION; RETAINED AUSTENITE; STRENGTH; BEHAVIOR;
D O I：
10.1016/j.ijfatigue.2022.107314
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this work, the microstructure and fatigue properties of the 17Cr2Ni2MoVNb gear steel after gas carburizing (GC) and low-pressure carburizing (LPC) were comparatively evaluated. The results showed that fewer carbides and a higher fraction of retained austenite (RA) were found in the carburized layer of the LPC specimens, as a result of the different quenching temperature. Rotating bending fatigue tests revealed that both the LPC and GC specimens had a fatigue limit of 980 MPa. Compared with the GC specimens, the LPC specimens had significantly higher fatigue strengths at a specific number of cycles under high cyclic stresses.
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页数：11
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