GSD-09 INFLUENCES OF SURFACE TEXTURE AND LUBRICATING OIL TEMPERATURE ON SURFACE FAILURE OF ROLLING-SLIDING CONTACT IN THE CASE OF CASE-CARBURIZED ALLOY STEELS(GEAR STRENGTH AND DURABILITY, INCLUDING GEAR MATERIALS AND HEAT TREATMENT TECHNIQUES)

概要

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Recently, power transmission gears have been running under the conditions of heavier load and higher lubricating oil temperature. In this study, the influences of surface texture and lubricating oil temperature on the surface failure of the rolling-sliding contact in the case of case-carburized alloy steels were investigated. The test rollers were made of low-alloyed steel, and they were carburized, hardened and tempered. After heat treatment, test rollers having three kinds of surface textures were finished by grinding and hand finishing. Roller tests were conducted under the rolling-sliding contact, high-load condition and various lubricating oil temperatures. In the case of test rollers with smoother initial surface roughness and lower lubricating oil temperature, the following results are obtained: The surface temperature does not rise under the high-load condition. The number of pits, the amount of wear and generating noise decrease. Therefore, it is found that the case-carburized gears with the higher surface durability can be developed by finishing the smooth tooth surface and controlling the lubricating oil temperature.
一般社団法人日本機械学会の論文
2009-05-13