| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermit welding method for rails for which a bisecting type casting mold having high execution efficiency is used and by which the fatigue performance of a welded joint part is improved. SOLUTION: This method is a method of performing the thermit welding of the rail by using the bisecting type casting mold and the rail is welded by arranging the rail in the inside of the bisecting type casting molds 4A, 4B so that the surfaces 3B of the foot part of the rail is neared to the inner surfaces of the bisecting type casting molds 4A, 4B than the bottom face 3A of the foot part of the rail and, after that, pouring molten metal produced by thermit reaction into the bisecting type casting molds 4A, 4B. It is preferable to make the surfaces 3B of the rail foot part is brought into contact to the inner surfaces of the bisecting type casting molds 4A, 4B. COPYRIGHT: (C)2008,JPO&INPIT |
