论文部分内容阅读
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 high temperature railway turnout 20 m above the rail, the basic rail induction heating test, and after heat treatment of the rail and the basic rail deformation and mechanical properties were tested. The results show that the depth of the hardened layer is greater than 10 mm and the hardness is 34-38 HRC. The microstructure is sorbite + a small amount of ferrite. After proper pre-deformation of the rail during quenching, the deformation deflection of the rail with 20 ~ 24 m can be controlled within 150 mm, which meets the technical requirements during the assembly of the high-speed turnout.