Motor core production method and heat treatment device used therefor
AssigneeDaido Steel Co., Ltd.
InventorKoichiro Asai
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Abstract
The present invention relates to a motor core production method including: a preparation step of preparing a laminate of electromagnetic steel sheets each processed into a predetermined shape; a first heating step of heating the laminate at an atmospheric temperature of 500° C. to 800° C. in an atmospheric gas comprising at least one kind selected from the group consisting of a low oxidizing gas and a reducing gas, and having a dew point of −20° C. or lower; and a second heating step of soaking the laminate at 1,000° C. to 1,200° C. in a vacuum of 100 Pa or less after the first heating step, and a heat treatment device for performing the production method.
Claims18
A motor core production method comprising:
- a preparation step of preparing a laminate of electromagnetic steel sheets each processed into a predetermined shape;
- a first heating step of heating the laminate at an atmospheric temperature of 500° C. to 800° C. in an atmospheric gas comprising at least one selected from the group consisting of a low oxidizing gas and a reducing gas, and having a dew point of −20° C. or lower;
- and
- a second heating step of soaking the laminate at 1,000° C. to 1,200° C. in a vacuum of 100 Pa or less after the first heating step.
Dependencies are inferred from the claim text.