材質の変更と新熱処理条件等による耐摩耗トングレールの開発

摘要

In both of standard gauge Shinkansen and meter gauge lines, tongue rails of branching side of turnout on which a lot of trains pass through must be replaced very often due to heavy wear. Hence, from the viewpoint of reducing maintenance cost of tongue rail by extending its service life, it is very important to develop a new tongue rail which has improved wear resistance. The new tongue rail was manufactured by adopting new material, new heal treatment and improved profile. This paper describes the details of newly developed tongue rail of improved wear resistance including its design and the results for vehicle running tests carried out in a revenue line of metere gauge.%在来線，新幹線を問わず，分岐線側の通過車両が多いrnポイント部ではトングレールの摩耗が著しく，交換周期rnが非常に短いのが実態である。このため，材料コスト削rn減の観点からも，摩耗の進行が遅く交換周期の延伸が可rn能な新たなトングレールの開発が要望されている。