C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/8
C21D 8/12 (2006.01)
Patent
CA 1197759
ABSTRACT OF THE DISCLOSURE An improvement in the manufacture of cube-on-edge oriented silicon steel; the improvement comprises serrating said steel either before or after final texture annealing, whereby reduced watt loss is achieved. Cube-on-edge oriented silicon steel in the form of sheets is known for use in various electrical applications including transformer cores. With cube-on-edge silicon steel the alloy is characterized by secondary recrystallization in the (110) [001] position which is termed the cube-on-edge position. This material in sheet form has the direction of easy magnetization in the direction of rolling. In applications for this maternal, and specifically when used in the manufacture of transformer cores, the material is required to nave reduced watt loss, because the consumption of electrical energy decreases as iron loss decreases. It is accordingly an object of the present invention to provide a method whereby in the manufacture of cube-on-edge silicon steel reduced watt loss may be achieved. This and other objects of the invention, as well as a more complete understanding thereof, may be obtained from the following description and specific examples. In the practice of the invention cube-on-edge silicon steel to which the invention is directed is conventionally processed by hot rolling and cold rolling with intermediate annealing. Thereafter, the steel is subject to texture annealing to produce the desired secondary recrystallization in the (110) [001] position. It has been found, in accordance with the present
422373
Allegheny Ludlum Corporation
Riches Mckenzie & Herbert Llp
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