Cr4Mo4V轴承钢滚动接触疲劳和磨损性能研究

发布时间：2018-05-01 11:15

本文选题：轴承钢 + 滚动接触疲劳　；参考：《摩擦学学报》2017年02期

【摘要】：通过球棒滚动接触疲劳(RCF)试验机,研究了Cr4Mo4V轴承钢在4050润滑油润滑和0.18滑滚比条件下的滚动接触疲劳和磨损性能.结果表明:Cr4Mo4V钢的应力-寿命(S-N)曲线数据分散性较大,疲劳寿命随着应力增加呈下降趋势.Cr4Mo4V钢滚动接触磨损主要为磨料磨损,黏着磨损和疲劳磨损,随着应力和时间增加磨损体积增加,滚道凹槽深度达到17μm.通过光学显微镜(OM)和扫描电子显微镜(SEM)观察试样棒剖面与滚道交界处疲劳裂纹,发现疲劳破坏类型主要有两种:起源于表面的剥落(SOF)和起源于白蚀区的剥落(WSF).通过滚道径向切割抛光酸蚀显示Cr4Mo4V钢滚动接触疲劳影响区,随着应力和循环接触次数的增加,在次表层依次发现黑蚀区(DER)、白蚀区(WEA)和蝴蝶组织(BW).表面碳化物的剥落坑,黏着磨损和疲劳磨损的凹坑导致了表面起裂、白蚀区和蝴蝶组织中的碳化物和夹杂导致微裂纹的产生,链状碳化物使裂纹往深处扩展.
[Abstract]:The rolling contact fatigue and wear properties of Cr4Mo4V bearing steel under the conditions of 4050 lubricating oil lubrication and 0.18 sliding roll ratio were studied by means of a ball rod rolling contact fatigue tester. The results show that the stress-life curve data of the steel w Cr4Mo4V are dispersive, and the fatigue life of the steel decreases with the increase of stress. The rolling contact wear of Cr4Mo4V steel is mainly abrasive wear, adhesion wear and fatigue wear. With the increase of stress and time, the raceway groove depth increases to 17 渭 m. By means of optical microscope (OM) and scanning electron microscopy (SEM), the fatigue cracks at the interface between the rod profile and the raceway were observed. It was found that there are two main types of fatigue failure: surface spalling (SOF) and denudation (WSF) originating in the white corrosion zone. The raceway radial cutting and polishing acid etching shows the rolling contact fatigue zone of Cr4Mo4V steel. With the increase of stress and cyclic contact times, the black corrosion zone (DERA), the white etching zone (WEAA) and the butterfly tissue (BW) are found in turn in the subsurface layer. The surface carbides spalling pits, adhesion wear and fatigue wear pits lead to the surface crack initiation, the carbides and inclusions in the white etching zone and butterfly tissue lead to microcracks, and the chain-like carbides cause the cracks to spread deep.
【作者单位】：昆明理工大学材料科学与工程学院;钢铁研究总院特殊钢研究所;
【基金】：国家高技术研究发展计划项目(863)(2012AA03A503)资助~~
【分类号】：TG142.1

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