| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a hot tool steel with which the segregation of components in the hot tool steel is reduced and the characteristics of the hot tool steel can be improved. SOLUTION: After introducing a strain by applying one series of hot-forging to at least any one-direction in three directions mutually crossing at the right angle to an ingot 10 of the hot tool steel containing 3-6 mass% Cr, a soaking is applied at the temperature condition of 1,200-1,300°C for 6hr or more. COPYRIGHT: (C)2007,JPO&INPIT
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