Nb-V合金化处理对高锰钢辙叉组织与性能的影响  

Effect of Nb-V Alloying on the Microstructure and Properties of High Manganese Steel Frog

作　　者：严则会[1] 徐彬[2] 孙俊杰[2] YAN Zehui;XU Bin;SUN Junjie(Turnouts Research Institute,Technology Center,China Railway Baoji Bridge Group Co.,Ltd.,Baoji 721006,China;School of Materials Science and Engineering,State Key Laboratory for Mechanical Behaviour of Materials,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]中铁宝桥集团有限公司技术中心轨道线路研究院,陕西宝鸡721006 [2]西安交通大学材料科学与工程学院,金属材料强度国家重点实验室,陕西西安710049

出　　处：《铸造技术》2022年第7期567-572,共6页Foundry Technology

基　　金：中国中铁股份有限公司川藏铁路科技研究开发计划(第二批)(CZ02-重点-10)。

摘　　要：本文研究了普通高锰钢Mn13的铌和钒合金化及其对组织和性能的影响。结果表明,由于大量非常细小而硬的Nb(C,N)和V(C,N)颗粒沉淀,Nb-V合金化高锰钢辙叉的晶粒比普通Mn13钢辙叉细化了1~2级。与普通ZGMn13辙叉相比,铌和钒合金化高锰钢辙叉的力学性能得到了有效改善,屈服强度、抗拉强度和冲击功分别提高了28%、11%和10%。性能的改善抑制了在使用期间由爆炸硬化引起的心轨水平裂纹的萌生。铌钒合金化高锰钢辙叉的使用寿命由原来的1.44亿吨提高到2.5亿吨以上。Alloying of common high manganese steel Mn13 by Nb and V and their effect on microstructure and properties have been studied. The results show that due to the large of very fine and hard Nb(C,N) and V(C,N) particles precipitated,the grain of Nb-V alloyed high manganese steel frog is refined 1~2 grades compared to that of common Mn13 steel frog.Compared with the common ZGMn13 frog, the mechanical properties of Nb and V alloyed high manganese steel frog are improved effectively, the yield strength, tensile strength and impact energy are increased by 28%, 11% and 10%respectively. The improved properties inhibit the initiation of horizontal cracks in the point rail during service caused by explosion hardening. The service life of Nb-V alloyed high manganese steel frog is increased from original 150 million tons to more 250 million tons.

关 键 词：高锰钢 爆炸硬化 合金化 耐磨性 

分 类 号：TG142.72[一般工业技术—材料科学与工程]