Effect of as-ground surface and the BALINIT^庐 C and Nb-S coatings on contact fatigue damage in gears

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• 作者：V. Moorthy ; ^{v.moorthy@ncl.ac.uk} ; B.A. Shaw
• 关键词：Gears ; Surface coatings ; Contact fatigue ; Micro-pitting
• 刊名：Tribology International
• 出版年：2012
• 期刊代码：88_0301679x
• 类别：ce
• 出版时间：July, 2012
• 卷：51
• 期：Complete
• 页码：61-70
• 文件大小：2972 K

摘要

The influence of as-ground surface and the BALINIT^庐 C and Nb-S coatings on contact fatigue damage have been investigated using testing of case-carburised S156 steel helical gears. The micro-surface features on the as-ground gear flank tend to initiate micro-pitting. In BALINIT^庐 C coated gears, the surface irregularities are removed by polishing effect resulting in small scale initiation of micro-pitting at the interface between polished and unpolished regions. In Nb-S coated gears, the coating tends to penetrate and fill-up the surface micro-valleys and hence showed only scattered micro-pitting. The Nb-S coated gears did not produce any tooth profile loss whilst the BALINIT^庐 C coated gears produced profile loss. However, both BALINIT^庐 C and Nb-S coated gears show enhanced contact fatigue performance.