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Post-testing measurement of freely movable and diffusible hydrogen in context of WEC formation at cylindrical roller thrust bearings from 100Cr6

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Friction 2021年第4期9卷 876-890页

作者： Martin LINZMAYER Francisco GUTIÉRREZ GUZMÁN gregor manke Georg JACOBS Christopher SOUS Michael POHL Institute for Machine Elements and System Engineering RWTH Aachen UniversitySchinkelstrasse 10Aachen 52062Germany Institute for Materials Material TestingRuhr University BochumUniversitatsstr 150Bochum 44801Germany

Sub-surface crack networks in areas of altered microstructure are a common cause for bearing *** to its appearance under light microscopy,the damage pattern is referred to as White Etching Cracks(WEC).The root causes leading to the formation of WEC are still under ***,it has already been shown that atomic hydrogen can have an accelerating effect on the formation and propagation of *** addition to hydrogen pre-charging,hydrogen can be released and absorbed during rolling/sliding due to the decomposing of the lubricant and *** current work focuses on the analysis of the hydrogen content of cylindrical roller thrust bearings after testing in a FE8 type test rig using two different *** the framework of this work,two different hydrogen analysis methods were used and assessed regarding their *** results show that the so-called Hydrogen Collecting Analysis(HCA)is more suitable to investigate the correlation between lubricant chemistry and hydrogen content in the test bearings than the Local Hydrogen Analysis(LHA).The measurements with the HCA show a continuously increasing freely movable and diffusible hydrogen content under tribological conditions,which leads to the formation of *** tests with an oil without hydrogen showed that the tendency of the system to fail as a result of WEC can be reduced by using a lubricant without hydride compounds.

关键词： White Etching Crack(WEC) White Etching Areas(WEA) hydrogen content Hydrogen Collecting Analysis(HCA) freely movable hydrogen diffusible hydrogen cylindrical roller thrust bearing roller bearings roller contact fatigue

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