Lubricant Additives Technologies for Extending the Rolling Contact Fatigue Life

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  • SUNAGAWA Yoji
    Drivetrain Lubricants Group, Lubricants Research Laboratory, Idemitsu Kosan Co., Ltd.

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  • 転がり疲れの長寿命化に及ぼす添加剤技術
  • コロガリ ツカレ ノ チョウジュミョウカ ニ オヨボス テンカザイ ギジュツ

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<p>This article focused on the recent technologies of lubricant additives for extending the rolling contact fatigue life. The rolling contact fatigue life depends on the lubricant film thickness, the friction force, and the contact stress. In order to extend the rolling contact fatigue life, thicken the lubricant film thickness, reduce the friction force, and relax the contact stress are effective. Polymer additives are effective for thickening the lubricant film and reducing friction force. Boundary lubricity additives form the low friction layer and some kind of boundary film lead to contact stress relaxation.</p>

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