Patent ID: 9429374
Filing Date: 2016-08-30
CPC Classification: C21D,F27D,F28F

Claim Text:
1. A rail cooling method for performing forced cooling on a head and a foot of a hot-rolled rail, the rail cooling method comprising: calculating an estimated amount of warp at an ambient temperature, based on a formula, that is a regression value obtained by regression calculations using temperatures including (1) a head cooling start temperature T measuring an actual amount of warp of the rail that is a warp that the rail actually has when the rail is cooled to the ambient temperature after a forced cooling; calculating, based on a relation between the actual amount of warp and the estimated amount of warp at the ambient temperature, a target value or a target value range for each of the temperatures T setting a cooling condition in accordance with the target value or the target value range to perform the forced cooling on the head and the foot.