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介绍了所研制的移动式钢轨焊接接头表面硬化处理装置的结构、功能与使用方法.利用该装置对U71Mn和U75V钢轨焊后轨头表面硬化处理(即欠速淬火)试验.分别进行化学成分、硬度以及显微组织分析.结果表明:处理后的钢轨接头,具有较理想的显微组织和更为合适的轨顶硬度;可以成功地对钢轨焊接接头进行在线热处理,满足线路现场施工的热处理工艺要求.
The structure, function and using method of the surface hardening treatment device of the mobile rail welding joint were introduced.Using the device, the surface hardening treatment (ie, under-speed quenching) of the rail head of the U71Mn and U75V rail was carried out.The chemical composition, Hardness and microstructure analysis.The results show that the treated rail joints have the ideal microstructure and the more suitable rail top hardness.The steel rail welded joints can be successfully heat treated online to meet the heat treatment process of on-site construction Claim.