| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling method of a base stock for titanium alloy by which the rolling can be performed by a small number of processes without generating flaws such as cracks on the surface, and fuel and thermal energy can be reduced. SOLUTION: This method is a rolling method of the base stock for titanium alloy which includes a heating stage S1 where the ingot ( base stock of the titanium alloy ) W1 is heated up to 1,200°C, for example, and a first blooming stage S2 where such a heated ingot W1 is made into a bloom ( intermediated base stock ) W2 having a cross section which is reduced to the reduction of area of≥80% by hot blooming of a plurality of times, a complementary heating stage S3 where the bloom W2 is heated to≥1,150°C and a second blooming stage S4 where the complementarily heated bloom W2' is made into a billet ( titanium alloy material ) W3 having a cross section which is reduced to a reduction of area of≥50% by hot blooming of a plurality of times. COPYRIGHT: (C)2005,JPO&NCIPI
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