衝撃摩耗に関する基礎的研究 : 大気乾燥下における焼なましS45C炭素鋼の衝撃摩耗特性

概要

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Annealed S45C carbon steel pins with flat ends were repeatedly impacted upon hardened SUJ2 disks rotating in dry air. The test conditions used were a constant impact energy 0.29 J, sliding speed of 0.055-2.5 m/s and maximum number of impact cycles of 5×10^5 The impact wear characteristic of the pins was investigated by focusing attention on the wear rate (mm^3/cycle) and the changes in the surfaces and subsurfaces. The variation tendency of wear rate with sliding speed was very similar to that of specific wear (mm^3/kgf・mm) in sliding friction under a constant load for the same steel. The changes in worn surfaces and subsurfaces with sliding speed observed here were also similar to those in sliding friction without impact load. With repeated impact, however, fatigue cracks leading to flakes were produced in continuous hardlayers of pins and in subsurfaces of disks at high sliding speed, and oxides or oxide films at worn surfaces were broken away.
一般社団法人日本機械学会の論文
1992-11-25