| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method without necessitating a stage for straightening strain in the manufacture of an H-shape steel in which accelerating cooling is executed in order to imparting high strength and high toughness after finish rolling. SOLUTION: In a stage in which the H-shape steel is formed by finish rolling after rolling a bloom into a base stock having the shape of the H-shape steel with a break down mill and roughly rolling the dimensions of each part, before the finish rolling stage, cooling for unifying the temperature distribution on the outside surface of flanges or lowering the temperature in fillet parts at this temperature distribution is executed and, after that, the finish rolling by which the opening angle of the flanges becomes zero is executed. |
