高锰钢辙叉增材制造工艺研究  

Research on additive manufacturing process for manganese steel switch frog heart track

作　　者：李明刚 吴海斌[1] 李成浩 程亮[1] Li Minggang;Wu Haibin;Li Chenghao;Cheng Liang(China Railway Baoji Bridge Group Co.,Ltd.,Baoji Shaanxi 721006,China)

机构地区：[1]中铁宝桥集团有限公司,陕西宝鸡721006

出　　处：《山西建筑》2024年第5期138-140,共3页Shanxi Architecture

摘　　要：高锰钢辙叉目前作为铁路关键核心部件,心轨小断面因剥落掉块、龟裂等形式失效,辙叉通常采用铸造方式制造,铸造过程中钢液中存在杂质,成型后杂质随机存在于高锰钢辙叉各部位,对其在线服役寿命产生一定影响,因此去除心轨小端面铸造高锰钢部分,采用增材制造工艺对心轨小断面易失效部位进行替换,增材制造所用材料为纯净度极高的高锰钢材料,本次试验进行心轨不同深度增材制造,对其力学性能、显微组织等进行一系列试验,结果表明各项性能指标优于铸造高锰钢。Currently,manganese steel switch frogs are as key components in railways.The small cross-section of the heart track often fails due to forms such as peeling,block detachment,and cracking.The switch frogs are typically manufactured through casting,which introduces impurities into the steel during the process.These impurities randomly exist in various parts of the manganese steel switch frog,which affects its online service life.Therefore,in order to remove the casting part of the manganese steel on the small end face of the heart track,an additive manufacturing process is adopted to replace the vulnerable parts of the small cross-section.The material used in additive manufacturing is a high-purity manganese steel material.In this experiment,additive manufacturing is performed at different depths of the heart track,and a series of tests are conducted on its mechanical properties,microstructure,etc..The performance indicators are superior to those of the cast manganese steel.

关 键 词：高锰钢 辙叉 增材制造 

分 类 号：U213.62[交通运输工程—道路与铁道工程]