中国铁道科学2018，Vol.39Issue(1)：75-81,7.DOI:10.3969/j.issn.1001-4632.2018.01.10
高速动车组新材质车轮性能研究
Study on Performance of New Material Wheel for High Speed Electric Multiple Unit
摘要
Abstract
In order to improve the strength and hardness of wheels for high speed EMU,taking into account the toughness at the same time,the chemical composition design of new material wheel and the preparation of samples were carried out.The chemical composition,tensile property,section hardness,fracture toughness and hardenability of the sample were tested.The metallographic structure,microstructure and precipitates were observed.The performance of the new material wheel was analyzed and compared with the ER8 wheel.Results show that,by means of increasing the mass fraction of Si and adding V in the new material wheel with the same mass fraction of C and the mass fraction of Mn as usual,compared with the ER8 wheel,the values of tensile strength,yield strength,hardness and fracture toughness of new material wheel are increased about 9％,12％,15 HBW and 10％ respectively.The values of elongation,impact toughness and hardenability are equal to those of the ER8 wheel.Under the same tread depth,the pearlite colony of the new material wheel is finer,the pearlite lamellar spacing is smaller and the volume fraction of the proeutectoid ferrite is higher.Increasing the mass fraction of Si and adding V in the new material wheel can also change its microstructure and distribution,which is the direct reason for its higher strength,hardness and fracture toughness.关键词
动车组/车轮/材质/硬度/强度/韧性/强化机制/高速铁路Key words
Electric multiple unit/Wheel/Material quality/Hardness/Strength/Toughness/Strengthening mechanism/High speed railway分类
交通工程引用本文复制引用
丛韬,韩建民,陈刚,张关震,张斌..高速动车组新材质车轮性能研究[J].中国铁道科学,2018,39(1):75-81,7.基金项目
国家“九七三”计划项目(2015CB654805) （2015CB654805）
国家自然科学基金资助项目(U1334204,51371022) （U1334204,51371022）
国家重点研发计划项目(2017YFB0702004) （2017YFB0702004）
中国铁路总公司科技研究开发计划项目(2014J004-I) （2014J004-I）
