U71Mn 75 kg/m 重型钢轨的性能研究  

PERFORMANCE RESEARCH OF U71Mn 75 kg/m HEAVY RAIL STEEL

作　　者：纪绯绯[1] 

机构地区：[1]济南大学,山东济南250022

出　　处：《钢铁钒钛》2003年第1期16-20,共5页Iron Steel Vanadium Titanium

摘　　要：研究了U71Mn75kg/m重型钢轨钢的等温转变曲线及连续冷却曲线,发现将冷却速度控制在8～2℃/s之间,可获得强度高、耐磨性好的珠光体;通过与U7460kg/m钢轨的对比试验可知,在二者实物疲劳强度相近的情况下,U71Mn75kg/m重型钢轨的承载能力是U7460kg/m钢轨的1.3倍,在同样的冲击能量下,前者所承受的冲击次数高于后者。The isothermal transformation curve and continuous cooling curve of U71Mn 75 kg/m heavy rail steel were measured. According to the results of isothermal transformation and continuous cooling transformation, the optimal eutectoid structure in the heavy rail steel could form when the cooling velocity was controlled between 2 ℃/s and 8 ℃/s. The comparison tests of U71Mn 75 kg/m steel and U74 60 kg/m steel show that the load capacity of the former is 1.3 times larger than that of the later while the practical fatigue strength is approximate, and the impact toughness of the former is better than that of the later with the same impact force. 

关 键 词：重型钢轨 等温转变曲线 连续冷却曲线 疲劳曲线 

分 类 号：U213.4[交通运输工程—道路与铁道工程]