切削液对 42CrMo4 钻孔部件表面完整性和疲劳强度的影响

Rosalinda Solis , Raphaël Lorain , Cici Mehmet , Thierry André , Hervé Pascal , Eliot Chaize , Emilie Viéville , Joël Rech
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引用次数: 0

摘要

本研究探讨了钻孔操作过程中切削液对 42CrMo4 淬火钢表面完整性和疲劳强度的影响。调查内容包括表征表面形貌、不同钻孔位置的微观结构和残余应力。进行了疲劳测试,并将测试结果与表面完整性观测结果进行了关联。研究结果表明,裂纹起始发生在孔内的过渡区域,在该区域,切削过程从纯切削演变为具有强粘附层的区域。没有切削液会导致表面粗糙度和拉伸残余应力增加,从而使疲劳强度降低 28%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of a cutting fluid on the surface integrity and fatigue strength of 42CrMo4 drilled parts.

This study investigates the influence of a cutting fluid during the drilling operation on the surface integrity and fatigue strength of 42CrMo4 hardened steel. The investigation includes characterizing surface topography, microstructure at different hole locations, and residual stresses. Fatigue tests were conducted, and the results were correlated with observations on surface integrity. The findings reveal that crack initiation occurs in a transition zone within the hole, where the cutting process evolves from pure cutting to a region with a strongly adhesive layer. The absence of cutting fluid leads to increased surface roughness and tensile residual stresses, resulting in a 28% reduction in fatigue strength.

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