| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling process of a low manufacturing cost by raising the productivity of a rolling line, improving the yield by shortening a fish tail in blooming, expanding the width of rollable size, warranting internal properties without defective internal properties such as insufficient press-contact in the center part and preventing the generation of harmful surface flaws due to the temperature drop of a material in a rolling of metal, in particular in a rolling method of metal including hard-to-roll metal such as tool steel or superalloy. SOLUTION: As shown in the FR stage 9 of Fig. 1, after feeding a forging billet which is a steel ingot or a continuously cast slab 1 including the hard-to- roll metal such as the tool steel or the superalloy reduced from four sides by using a heating furnace 6 for forging and forging press which is a forging device 7 before a rolling stage to a blooming mill 3 after performing heating by again charging the billet into the heating furnace 6 for forging without cooling, the billet is made into a product by performing finish rolling with a finishing mill 4.
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