124 テクスチャが付与された超硬合金のトライボロジー特性(摩擦・摩耗材料(1),ものづくりにおける基礎研究と先端技術の融合)

概要

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Tribological properties of textured cemented carbide treated with fine particle peening were evaluated using a ring on disc type testing apparatus in boundary lubricated condition. The cemented carbide consisted form tungsten carbide (WC) and cobalt (Co) and the chromium alloy steel (SUJ2) disc was used for the specimen. The developed micro shot peening system consisted from the double walled nozzle and the storage tank contained rubber balls with media was applied to fabricate the texture consisted from micro dimples on the disc surface. The friction experiment was carried out with a cast iron ring at a constant sliding speed of 0.1 m/s and various applied loads from 100 to 1200 N. Results showed that the friction coefficient mated with the ring having truncated parallel grooves was smaller and that the higher load capability was obtained using higher hardness of the disc.
2010-11-27