摘要
白蚀区是轴承钢在滚动接触疲劳条件下出现的一种由夹杂物和碳化物诱发的特殊且重要的显微组织变化,与轴承钢的寿命密切相关。白蚀区已经被深入研究了70多年且取得了相当的进展,但关于白蚀区仍有许多关键科学问题有待解答。对白蚀区形成的应力环境进行了阐释,并对白蚀区中纳米晶粒、碳化物溶解、整体贫碳等显微结构特点和基于剧烈塑性变形的显微组织演变机理的研究进展进行了总结,基于当前的研究进展,认为应减少对白蚀区进行过量的显微组织表征,更多关注白蚀区形成过程的若干关键科学问题和悖论。白蚀区的研究对轴承钢加工制造及热处理过程具有重要指导意义,通过优化轴承钢的生产工艺,调控抑制白蚀区形成的显微组织,从而实现轴承钢的长寿命目标。
White etching areas are unique and important microstructural alteration originating from inclusions or carbides in bearing steels undergoing rolling contact fatigue,strongly associated with life of bearing steels.White etching areas have been studied in depth for more than 70 years with substantial progress achieved,a number of key scientific questions regarding white etching areas are still unanswered.This paper starts by elucidating the stress state where white etching areas are formed,followed by summarising the research progress on white etching areas’microstructure characteristics such as nano grains,carbide dissolution and overall carbon depletion and microstructure evolution mechanisms based on severe plastic deformation.Based on current research progress,it is suggested to reduce excessive microstructural characterisation on white etching areas and focus more on several key scientific questions and paradoxes during formation process of white etching areas.The study of white etching areas has important guiding significance for manufacturing and heat treatment of bearing steels.By optimizing manufacturing process of bearing steels and thus tailoring desired microstructures that suppress white etching area formation,the long life of bearing steels can be obtained.
作者
付悍巍
冯绍晨
FU Hanwei;FENG Shaochen(School of Materials Science and Engineering,Beihang University,Beijing 100191,China)
出处
《轴承》
2024年第11期12-19,共8页
Bearing
基金
航空发动机及燃气轮机基础科学中心项目(P2023-B-IV-001-001,P2022-DB-IV-001-001)
河北省省级科技计划资助项目(23561005D)。
关键词
滚动轴承
轴承钢
接触疲劳
疲劳裂纹
显微组织
非金属夹杂物
rolling bearing
bearing steel
contact fatigue
fatigue crack
microstructure
non-metallic inclusion
