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Comparison on the wear properties and rolling contact fatigue damage behaviors of rails by laser cladding and laser-induction hybrid cladding
Wear ( IF 5 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.wear.2020.203421
Li Meng , Beibei Zhu , Chen Xian , Xiaoyan Zeng , Qianwu Hu , Dengzhi Wang

Abstract In this paper, the wear properties and rolling contact fatigue (RCF) damage behaviors of the rails with Ni-based coatings deposited by laser cladding (LC) and laser-induction hybrid cladding (LIHC) are studied comparatively by roll–sliding contact tests. The results indicate that the RCF damage characteristics of the rail rollers by both LC and LIHC are almost same at the maximum contact stress σmax ≤ 800 MPa, while the wear rate of rail roller by LC is slightly lower. However, when the maximum contact stress increases to σmax ≥ 1230 MPa, the coatings and heating affected zone (HAZ) at the contact edge of the rail roller by LC spall and fracture severely, leading to much higher wear rate and much poorer smoothness than that by LIHC. Thus, compared with LC technology, LIHC technology can reduce the wear rate and contact fatigue damage extent of rails at higher contact stress, and thereby maintain the surface profile and smoothness better.

中文翻译:

激光熔覆与激光感应混合熔覆钢轨磨损性能及滚动接触疲劳损伤行为比较

摘要 本文通过滚滑接触试验对比研究了激光熔覆(LC)和激光感应混合熔覆(LIHC)沉积镍基涂层钢轨的磨损性能和滚动接触疲劳(RCF)损伤行为。 . 结果表明,在最大接触应力σmax ≤ 800 MPa 时,LC 和 LIHC 对轨道滚轮的 RCF 损伤特性几乎相同,而 LC 对轨道滚轮的磨损率略低。然而,当最大接触应力增加到 σmax ≥ 1230 MPa 时,钢轨滚轮接触边缘的涂层和热影响区(HAZ)受到 LC 剥落和断裂的严重影响,导致磨损率远高于由 LIHC。因此,与 LC 技术相比,
更新日期:2020-10-01
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