Local heat treatment of electrical steel

Details Local heat treatment of electrical steel Local heat treatment of electrical steel

C - Chemistry, Metallurgy

21

D

148/8

C21D 1/78 (2006.01) C21D 8/12 (2006.01) C21D 9/46 (2006.01) H01F 1/04 (2006.01) H01F 1/147 (2006.01)

Patent

CA 1231292

LOCAL HEAT TREATMENT OF ELECTRICAL STEEL ABSTRACT OF THE DISCLOSURE A process for improving the core loss of magnetic materials of the type having a plurality of magnetic do- mains and which may have an insulative coating such as a mill glass, an applied coating, or both. The magnetic material is subjected to a local heat treatment employing radio frequency induction heating, radio frequency re- sistance heating, or electron beam resistance heating to induce artificial boundaries. Thereafter, the magnetic material is subjected to an annealing treatment.

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