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Optical and Other Properties Changes of M-50 Bearing Steel Surfaces for Different Lubricants and Additives Prior to Scuffing

 

作者: JamesL. Lauer,   Norbert Marxer,   WilliamR. Jones,  

 

期刊: A S L E Transactions  (Taylor Available online 1986)
卷期: Volume 29, issue 1  

页码: 13-24

 

ISSN:0569-8197

 

年代: 1986

 

DOI:10.1080/05698198608981655

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

An ester lubricant base oil containing one or more standard additives to protect against wear, corrosion, and oxidation was used in an experimental ball/plate elastohydrodynamic contact under load and speed conditions such as to induce scuffing failure in short times. Both the ball and the plate were of identically treated M-50 steel. After various periods of operating time, the wear track on the plate was examined (a) with an interference microscope of ± 30 Å depth resolution and (b) sometimes also with a scanning ellipsometer, and (c) a scanning Auger spectrometer. The optically deduced surface profiles varied with wavelength, indicating the presence of surface coatings, which were confirmed by the other instrumentations. As scuffing was approached, a thin (∼40 Å) oxide layer and a carbide layer formed in the wear track, in particular, when tricresylphosphate antiwear additive was present in the lubricant. The rates of the formation of these layers and their reactivity toward dilute alcoholic HCl depended strongly on the lubricant and additives. Based on these results, suggestions for improved formulations and a test method for bearing reliability could be proposed.Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in San Diego, California, October 22–24, 1984

 

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