C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/8
C21D 8/12 (2006.01) C21D 1/26 (2006.01)
Patent
CA 1333988
Ultra-rapid annealing of nonoriented electrical steel is conducted at a rate above 100°C per second on prior to or as part of the strip decarburization and/or annealing process to provide an improved texture and, thereby, improved permeability and reduced core loss. During the ultra-rapid heating of cold-rolled strip, the recrystallization texture is enhanced by more preferential nucleation of {100}<uvw> and {110}<uvw> oriented crystals and reduced formation of {111}<uvw> oriented crystals. The preferred practice has a heating rate above 262°C per second to a peak temperature between 750°C and 1150°C and held at temperature for 0 to 5 minutes.
592529
Armco Inc.
Riches Mckenzie & Herbert Llp
LandOfFree
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