中国塑料

中国塑料 ›› 2015, Vol. 29 ›› Issue (11): 38-42 .DOI: 10.19491/j.issn.1001-9278.2015.11.006

• 材料与性能 • 上一篇    下一篇

铁路桥梁支座耐磨材料的性能研究与优选应用

黄安民1,刘婷1,朱志勇2,伍海斌   

  1. 1. 株洲时代新材料科技股份有限公司2. 中国南车株洲时代新材料科技股份有限公司
  • 收稿日期:2015-06-11 修回日期:2015-11-17 出版日期:2015-11-26 发布日期:2015-11-26

Property Research and Selection of Wear-resistant Materials for Railway Bridge Bearings

  • Received:2015-06-11 Revised:2015-11-17 Online:2015-11-26 Published:2015-11-26

摘要： 采用模压法制备了超高相对分子质量聚乙烯(PE-UHMW)复合材料和聚四氟乙烯(PTFE)2种桥梁支座高分子耐磨材料，对其力学性能、耐热性能、抗重载性能和耐磨性能进行了对比研究。结果表明，PE-UHMW复合材料的缺口冲击强度、拉伸强度、弯曲强度、压缩强度均明显高于PTFE材料；其导热系数为0.58 W/(m· K)，是PTFE材料的223.1 %；在90 MPa和190 MPa压应力下24 h后，PE-UHMW复合材料的蠕变率分别为PTFE材料的47.1 %和81.4 %，PE-UHMW复合材料变形较小；2种材料经50 km磨耗测试后， PE-UHMW复合材料的线磨耗率仅为PTFE材料的7.4 %，耐磨性能远优于PTFE材料。

关键词: 超高分子量聚乙烯, 聚四氟乙烯, 耐磨材料, 铁路桥梁支座

Abstract: Two railway bridge bearing composites based on ultra-high molecular weight polyethylene (PE-UHMW) and polytetrafluoroethylene (PTFE) were prepared and their mechanical properties, heat-resistance, heavy load-bearing capacity, and wear-resistance were compared. It was found that the notched impact strength, tensile strength, flexural strength, and compressive strength of PE-UHMW composites were better than those of PTFE counterpart. The thermal conductivity of PE-UHMW composites was 0.58 W/(m·K), which was 223.1 % of that based on PTFE. The creep rates of PE-UHMW composites under a pressure of 90 and 190 MPa for 24 hours were 47.1 % and 81.4 % of those based on PTFE, respectively. Found in an abrasion test of 50 km, the line wear rate of PE-UHMW composites was only 7.4 % of that based on PTFE.

Key words: ultra-high molecular weight polyethylene, polytetrafluoroethylene, wear-resistant material, railway bridge bearing

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