Mn-V-Nb重轨钢组织与性能的研究  

Microstructure and Properties of Heavy-Duty Rail Steel Mn-V-Nb

作　　者：徐用吉[1] 樊邯生 刘景荣[2] 

机构地区：[1]东北工学院学报编辑部 [2]东北工学院材料科学与工程系

出　　处：《东北工学院学报》1991年第6期590-596,共7页

摘　　要：以研制特级耐磨重轨钢为目的,在 U 74普碳耐磨重轨钢化学成分的基础上,加入微量V,Nb 元素并适当提高 C,Mn 元素的含量,设计并冶炼出 Mn-V-Nb 重轨钢。研究了该钢的组织及性能。结果表明:Mn-V-Nb 钢的常规力学性能达到了特级耐磨轨钢的要求。在实验室条件下,抗磨损性能和抗接触疲劳性能分别较 U74 钢提高3.7 倍和 4.6倍。提高的原因在于珠光体片间距的细化及 V,Nb 元素的沉淀强化作用。Aiming at developing a specially wear-resisting heavy-duty rail steel, the microstructure and properties of a kind of steel Mn-V-Nb was investigated. The results show that the tensile strength of this steel is about 1238 MPa, with toughness and plasticity suitable for its application.Because of a pearlite interlamellar spacing about 0.169 nm and precipitation hardening of V ( C, N ) particles, its wear life and contact fatigue life are proved 3.7 and 4.6 times as longer as those of the conventional rail steel U74, respectively.

关 键 词：重轨钢 Mn-V-Nb 磨损 接触疲劳 

分 类 号：TG142.21[一般工业技术—材料科学与工程]