| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for straightening a rail for manufacturing the rail excellent in wear resistance, breaking resistance, and straightness by straightening a shape and reducing residual stress even when there is a distribution of strength in a cross section, and also to provide a device for straightening the rail. SOLUTION: The method for straightening the rail includes imparting a tensile force in the longitudinal direction of the rail after cooling the rail and imparting a bending moment for giving displacement in a vertically perpendicular direction to the longitudinal direction of allowing a head to be at an outer side or an inner side while ≥70% of an entire cross section is in a yield state. Accordingly, the rail having reduced bending and warping in the shape, and very low residual stress, and excellent in the wear resistance and the breaking resistance is manufactured. COPYRIGHT: (C)2011,JPO&INPIT |
