B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 11/00 (2006.01) B22D 11/06 (2006.01) B22D 11/124 (2006.01) C21D 8/12 (2006.01) C21D 1/667 (2006.01) C21D 1/74 (2006.01)
Patent
CA 2459471
A method for continuously casting grain oriented electrical steel is disclosed. This method utilizes a controlled rapid cooling step, such as one using a water spray, to control the grain orientation in the finished product. The product formed not only has the appropriate grain orientation but also has good physical properties, for example, minimized cracking. In this process, after a continuously cast electrical steel strip is formed, the strip undergoes an initial secondary cooling to from about 1150 to about 1250~C, and finally undergoes a rapid secondary cooling (for example, by water spray) at a rate of from about 65~C/second to about 150~C/second to a temperature of no greater than about 950~C.
L'invention concerne un procédé de coulée continue d'acier électrique à grains orientés. Ce procédé comprend une étape de refroidissement rapide et contrôlé, telle que celle par pulvérisation d'eau, afin de contrôler l'orientation du grain dans le produit fini. Ce produit formé présente non seulement une orientation des grains appropriée, mais également de bonnes propriétés physiques, par exemple, un fissurage minimal. Au cours de ce procédé, après la formation d'une bande d'acier électrique par coulée continue, cette bande subit un refroidissement secondaire initial compris entre 1150 et 1250 degrés environ, puis un refroidissement secondaire rapide (par exemple, par pulvérisation d'eau), à une vitesse de l'ordre de 65 ·C/seconde et 150 ·C/seconde, à une température qui ne dépasse pas 950 ·C environ.
Huppi Glenn S.
Schoen Jerry W.
Williams Robert S.
Ak Steel Properties Inc.
Macpherson Leslie & Tyerman Llp
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