公开(公告)号：US10662588B2

公开(公告)日：2020-05-26

申请号：US15580354

申请日：2016-05-19

Applicant: KOREA RAILROAD RESEARCH INSTITUTE

Inventor： Yong Hyeon Cho ,  Jin Yu Choi ,  Yun Suk Kang ,  Joo Uk Kim

IPC: E01B5/08 ,  B61C15/08 ,  B61H11/00 ,  E01B5/02 ,  B60B17/00 ,  B60B21/08 ,  C21D10/00 ,  C21D9/34 ,  C21D9/04 ,  B60B19/00 ,  C21D1/09 ,  C21D1/10

Abstract: A friction apparatus is provided. The friction apparatus includes: a first member having a first surface; and a second member having a second surface that contacts the first surface, and moving while in contact with the first member, wherein at least one of the first surface and the second surface is hardened.