B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
148/10, 22/167,
B22D 11/12 (2006.01) B21B 1/46 (2006.01) C21D 7/13 (2006.01)
Patent
CA 1298061
ABSTRACT OF THE DISCLOSURE A segregation preventive or eliminative operation is performed in under the following conditions: solidified/unsolidified ratio of the solidifying block is in a range of 0.5:1 to 0.9:1: ratio of the overall compression .delta. (mm) versus thickness of unsolidified area in the block (d mm) is greater than or equal to 0.5 or the thickness (d mm) of the unsolidified layer in the solidifying block is: 1.2 x D - 80 < d < 10.0 x D - 80 where D is the thickness of the block before compression. Casting speed may be controlled according to thickness of the solidifying shell at a crater end or near the crater end. Preferably. electromagnetic stirring is performed before performing compression forging.
542722
Fujimura Toshio
Imai Takuo
Kojima Shinji
Matsukawa Toshitane
Kawasaki Steel Corporation
Smart & Biggar
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