B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/51
B22D 11/12 (2006.01) B21B 3/00 (2006.01) B21B 13/18 (2006.01)
Patent
CA 1155631
- 14 - TITLE METHOD AND APPARATUS FOR HOT-FORMING METALS PRONE TO CRACK DURING ROLLING INVENTOR Ronald Dean ADAMS and Enrique Henry CHIA ABSTRACT A method of and apparatus for continuously casting a molten metal in a casting means to obtain a solidified cast bar at a hot-forming temperature, passing the cast metal at a hot-forming temperature from the casting means to a hot-forming means, and hot forming the cast bar into a wrought product by a two-stage reduction of its cross-sectional area while it is still at a hot-forming temperature, including, in the first stage, the step of forming a shell of finely distributed recrystallized grains in the surface layers of the cast bar by a selected small amount of deformation of the cast bar in its as-cast condition prior to the second stage in which substantial reduction of its cross-sectional area forms the wrought product. The shell of fine grains formed on the cast bar during the first stage of deformation permits substantial reduction of the cross-sectional area of the cast bar during the second stage of deformation without the cast bar cracking, even when the cast bar has a high impurity content.
361326
Adams Ronald D.
Chia Enrique H.
Mitches & Co.
Southwire Company
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