层流等离子体淬火对GCr15轴承钢的滚动接触疲劳及损伤性能的影响

doi:10.11896/cldb.21060076

材料导报

2023, Vol. 37

Issue (2): 21060076-7 https://doi.org/10.11896/cldb.21060076

金属与金属基复合材料

层流等离子体淬火对GCr15轴承钢的滚动接触疲劳及损伤性能的影响

闵军雄, 张敏男, 戴光泽^*, 赵君文^*

西南交通大学材料科学与工程学院,成都 610031

Effect of Laminar Plasma Quenching on Rolling Contact Fatigue and Damage Performance of GCr15 Bearing Steel

MIN Junxiong, ZHANG Minnan, DAI Guangze^*, ZHAO Junwen^*

School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China

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摘要为了提高GCr15轴承钢的滚动接触疲劳(RCF)性能,使用层流等离子体淬火(LPQ)技术对GCr15轴承钢表面进行了四种不同扫描速度(350 mm/min、550 mm/min、750 mm/min、950 mm/min)的等离子体淬火实验。用MJP-30滚动接触疲劳实验机对处理前后的试样进行RCF试验。采用激光共聚焦显微镜(VK-9710)、超景深显微镜(UDM, VHX-1000C, Japan)、扫描电子显微镜分析试样组织结构、成分、微观损伤形貌,对试样进行硬度测试,分析疲劳扩展机理。结果表明:由于LPQ的冷却速率及加热速率较快,试样表面产生淬火硬化区,形成细小的隐晶马氏体组织,表层硬度增大。硬化层厚度影响RCF扩展机理,硬化层厚度越深,疲劳寿命越长,LPQ使RCF寿命延长64%。

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	闵军雄
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关键词: 层流等离子体淬火(LPQ) GCr15轴承钢滚动接触疲劳(RCF) 裂纹扩展

Abstract: In order to improve the rolling contact fatigue (RCF) performance of GCr15 bearing steel, four plasma quenching experiments with different scanning speeds (350 mm/min, 550 mm/min, 750 mm/min, 950 mm/min) were carried out on the surface of GCr15 bearing steel by laminar plasma quenching (LPQ). The MJP-30 rolling contact fatigue testing machine was used to conduct RCF tests on the samples before and after the treatment. The laser confocal microscope (VK-9710), super depth of field microscope (UDM, VHX-1000C, Japan) and scanning electron microscope were used to analyze the microstructure, composition and microscopic damage morphology of the samples. The hardness of the samples was tested, and the fatigue propagation mechanism was analyzed. The results show that due to the rapid cooling rate and heating rate of LPQ, hardening zone was formed on the surface of the sample, and thus fine cryptocrystalline martensite structure was formed, which increased the surface hardness. The hardening layer thickness affects the RCF propagation mechanism. The deeper the hardening layer thickness is, the longer the fatigue life is. LPQ can increase the RCF life by 64%.

Key words: laminar plasma quenching (LPQ) GCr15 bearing steel rolling contact fatigue (RCF) crack propagation

发布日期: 2023-02-08

ZTFLH:

TH117.1

基金资助: 国家重点研发计划(2018YFB1201702-04)

通讯作者: *戴光泽,西南交通大学材料科学与工程学院教授。1998年毕业于日本京都工艺纤维大学,获工学博士学位。1994年,毕业于日本(国立)京都工艺纤维大学机械系统工学专业,获工学硕士学位。1985年,毕业于西安交通大学动力机械工程系低温技术专业,获学士学位。1999年12月加入西南交通大学材料科学与工程学院至今,主要从事材料服役行为及强度评价等领域的研究。
赵君文,西南交通大学材料科学与工程学院副教授、硕士研究生导师。2009年于华中科技大学材料加工工程专业获得工学博士学位,同年到西南交通大学材料学院工作至今。2004年于西华大学材料类专业获得工学学士学位。目前主要从事轨道交通关键材料、先进铸锻技术、相变储能材料等方面的研究工作。在Materials Science and Engineering A、Journal of Materials Processing Techno-logy、《金属学报》等国内外核心学术刊物上发表论文100余篇。

作者简介: 闵军雄,2019年6月毕业于重庆理工大学,获得工学学士学位。2019年9月至今,在西南交通大学攻读硕士学位,主要从事GCr15轴承钢表面强化领域的研究。

引用本文:

闵军雄, 张敏男, 戴光泽, 赵君文. 层流等离子体淬火对GCr15轴承钢的滚动接触疲劳及损伤性能的影响[J]. 材料导报, 2023, 37(2): 21060076-7.
MIN Junxiong, ZHANG Minnan, DAI Guangze, ZHAO Junwen. Effect of Laminar Plasma Quenching on Rolling Contact Fatigue and Damage Performance of GCr15 Bearing Steel. Materials Reports, 2023, 37(2): 21060076-7.

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http://www.mater-rep.com/CN/10.11896/cldb.21060076 或 http://www.mater-rep.com/CN/Y2023/V37/I2/21060076

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