摘要
对高速铁路道岔20 m以上的尖轨、基本轨进行了感应加热试验,并对热处理后的尖轨和基本轨的变形量和力学性能进行了测试。结果表明,轨头硬化层深度大于10 mm,断面硬度为34~38 HRC,金相组织为索氏体＋少量铁素体。对淬火过程中轨件适当的预变形后,20~24 m的轨件变形挠度控制在150 mm范围内,满足了高速道岔组装过程中的技术要求。
The switch and stock rail of high speed rail turnout with the length more than 20 m were tested by induction hardening.Deformation and mechanical properties of the switch and stock rail after heat treatment were measured.The results show that the hardened layer depth for head of rail is more than 10 mm,the hardness in cross-section is 34-38 HRC,and the optical microstructure is fine pearlite and a few ferrite.By pre-deformation for the length 20-24 m rail,the deflection of the rail can be controlled in the range of 150 mm,so that,which can meet technical requirements of high speed turnout assembly.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第3期103-105,共3页
Heat Treatment of Metals
关键词
高速铁路道岔
尖轨
基本轨
感应加热淬火
预变形
high-speed railway turnout
switch rail
stock rail
induction hardening
pre-deformation
