調質鋼ローラの転がり疲れに及ぼすあらさ組合せの影響

概要

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Using a two roller testing machine, the author examined the effect of the combination of surface roughnesses on the occurrence of pitting of thermal refined S 45 C steel rollers with a hardness of about 320 Hv. First, it was found that pitting concentrates on the smoother surface but is restrained on the mating rougher surface when two rollers with a difference in roughness are rotated under pure rolling conditions. Secondly, it was confirmed that although pitting is apt to occur on the slower surface under rolling with sliding conditions, the pitting life is generally short when the faster roller is rough and the slower roller is smooth, while the life is extremely long when the combination of roughnesses is reversed. Judging from the changes in hardness, the profile curves of mating surfaces, the states of oil film formation, the friction coefficients, etc., it was supposed that such a result is attributed to the difference in the plastic deformation due to the asperity interactions in the process of running-in.
一般社団法人日本機械学会の論文
1988-03-25