Volume 48, Issue 1 pp. 296-311
ORIGINAL ARTICLE

Rolling Contact Fatigue Behaviors of 20CrNi2Mo Steel by a New Carbon and Nitrogen Composite Infiltration Process

Jian Chen

Jian Chen

College of Materials and Metallurgy, Guizhou University, Guiyang, China

Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, Guizhou University, Guiyang, China

National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, Guizhou University, Guiyang, China

Contribution: Conceptualization, Methodology, Software, ​Investigation, Formal analysis, Writing - original draft

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Yilong Liang

Corresponding Author

Yilong Liang

College of Materials and Metallurgy, Guizhou University, Guiyang, China

Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, Guizhou University, Guiyang, China

National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, Guizhou University, Guiyang, China

Correspondence:

Yilong Liang ([email protected])

Contribution: Conceptualization, Funding acquisition, Resources, Supervision, Writing - review & editing

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Shaolong Li

Shaolong Li

College of Materials and Metallurgy, Guizhou University, Guiyang, China

Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, Guizhou University, Guiyang, China

National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, Guizhou University, Guiyang, China

Contribution: Visualization, ​Investigation

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Ming Yang

Ming Yang

College of Materials and Metallurgy, Guizhou University, Guiyang, China

Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, Guizhou University, Guiyang, China

National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, Guizhou University, Guiyang, China

Contribution: Resources, Supervision

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Yuguan Sun

Yuguan Sun

College of Materials and Metallurgy, Guizhou University, Guiyang, China

Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, Guizhou University, Guiyang, China

National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology, Guizhou University, Guiyang, China

Contribution: Software, Validation

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First published: 29 October 2024
Citations: 2

Funding: This research was supported by the Central Government Guides Local Science and Technology Development (Grant NO. [2019] 4011), the Construction Project of Anti-Fatigue Manufacturing Technology Innovation Ability of Key Components in Aerospace (Grant NO. Qian financial workers [2022] 92), and the Construction of Collaborative Innovation Platform for Fatigue Resistance Manufacturing Technology and Quality Reliability of Key Components (Grant NO. [2016034]).

ABSTRACT

In this paper, a new type of composite infiltration process was adopted for 20CrNi2Mo steel. Rolling contact fatigue (RCF) tests were carried out on the specimens treated with carburizing (C) and composite infiltration with carburizing and nitriding (C-N). The results showed that after C and C-N treatments were performed, the surface microhardness was increased by 78% and 114%, respectively, and the maximum CRS were −220 and −530 MPa. Moreover, the residual austenite volume fraction was controlled to approximately 10% for each treated sample. The fatigue limit of the C-N sample was 11.3% higher than that of the C sample. The fatigue failure mechanisms are caused by the maximum shear stress distribution and surface roughness. The surface layer of the C-N sample with higher hardness and more compressive residual stress inhibited the initiation of fatigue cracks, and the appropriate residual austenite in the carbon-nitrogen infiltrated layer inhibited the propagation of fatigue cracks.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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