CAJ | 학술논문

在研究高速铁路钢轨/车轮材料时，提高钢轨或车轮材料硬度可减少磨损，但单方面提高钢轨或车轮材料硬度，会导致与之配合的车轮或钢轨损伤更为严重，因此研究轮轨的匹配问题十分重要。研究根据赫兹接触理论，在MMS-2A磨损试验机上模拟不同钢轨和车轮匹配时的服役过程，并采用扫描电镜观察磨损表面，分析不同材料轮轨匹配服役后的损伤情况。结果表明：随着钢轨材料的含碳量增加，其磨损量下降，但与其相配的车轮的磨损量却随之增加；随着模拟轮轨硬度比的增加，摩擦副的总磨损量呈上升趋势。因此，为了取得摩擦副整体优良的使用性能，应该选择适当的钢轨钢和车轮钢，以达到轮轨之间最佳的硬度匹配。
재연구고속철로강궤/차륜재료시，제고강궤혹차륜재료경도가감소마손，단단방면제고강궤혹차륜재료경도，회도치여지배합적차륜혹강궤손상경위엄중，인차연구륜궤적필배문제십분중요。연구근거혁자접촉이론，재MMS-2A마손시험궤상모의불동강궤화차륜필배시적복역과정，병채용소묘전경관찰마손표면，분석불동재료륜궤필배복역후적손상정황。결과표명：수착강궤재료적함탄량증가，기마손량하강，단여기상배적차륜적마손량각수지증가；수착모의륜궤경도비적증가，마찰부적총마손량정상승추세。인차，위료취득마찰부정체우량적사용성능，응해선택괄당적강궤강화차륜강，이체도륜궤지간최가적경도필배。
It's found that the abrasion is reduced by improving the hardness of the rail or wheel materials when studying the materials for high speed railway rail/wheel.However,more serious damage is caused to the wheel or rail if only the hardness of the rail or wheel materials is improved.Therefore,it's very important to study the matching between the wheel and the rail.The rolling tests were performed using the MMS-2A computerized-control friction and wear testing machine without any lubricant.The wear behavior of rail and wheel with different materials was investigated by examining wear vol-ume and wear scar using optical microscopy (OM)and scanning electronic microscopy (SEM).The results indicate the wear volume of the rail is reduced with the increase of the carbon content of the rail,but the wear volume of the matching wheel is increased.With the increase of hardness ratio of imitated wheel to rail,the total wear volume of the frictional cou-ple shows a rising trend.Therefore,in order to ensure the overall application performance of frictional couple,appropriate rail steel and wheel steel should be selected to realize optimal hardness matching between wheels and rails.