1008 DLC複合表面改質による脱線防止車輪の開発(関東支部茨城講演会)

概要

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The cause of 'Climbing Derailment', which developed into the major accident, is high coefficient of friction contact of rail side and railway wheel flange. So, in order to solve this problem, it will be effective to modify the surface coating which indicate low friction properties at wheel flange. Then, in this study, DLC (Diamond Like Carbon) coating and MoS_2 coating which indicate low friction and high hardness were selected for coating in railway wheel flange to prevent the climbing derailment. After the basic evaluation was carried out used by test pieces, their coating were modified for model wheel and 2 cylinders rolling contact testing were carried out under the actual condition. Consequently, the wheel coated pre-processing (Radical Nitriding or Radical Nitriding+TiCN) before DLC coating (Hybrid coating) was accomplished low friction than the wheel coated DLC coating only. Furthermore, the wheel modified MoS_2 coating indicated excellent low friction (=0.06). It implies that to modify the hybrid coating used for this study was effective method in order to prevent climbing.
社団法人日本機械学会の論文
2005-09-08