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1前言对于铁道车辆机械式摩擦制动零件来说．适应高速化的需求并改善其经济性．已成为重要的课题。由于摩擦制动机是使制动机零件相互摩擦而得到摩擦力（制动力）的．因而制动机零件就必然存在一个因磨耗而无法使用的限界。为了改善其经济性．就要力求延K这些零件的寿命和更换?
1 Introduction For the railway vehicle mechanical friction brake parts. Adapt to speedy needs and improve their economics. Has become an important issue. As the friction brake is to make brake parts friction with each other (braking force). Therefore, the brake parts inevitably exist because of wear and can not use the boundaries. In order to improve its economy. We must strive to extend the life of these parts and replacement K?