Super low loss motor lamination steel
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United States of America Patent
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Dec 28, 1999
Grant Date -
N/A
app pub date -
Dec 8, 1997
filing date -
Dec 8, 1997
priority date (Note) -
Expired
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Abstract
The present invention is directed to a low loss motor lamination steel having a relatively low alloy content, which has a composition such that the motor lamination steel is fully ferritic at all solid temperatures. The steel preferably includes 1.20-1.40 wt. % silicon, 0.25-0.40 wt. % aluminum, 0.15-0.30 wt. % manganese and not more than 0.005 wt. % carbon. The processes for producing the fully ferritic low loss motor lamination steel include a hot band anneal followed by cold rolling, and a two-stage or double cold roll process.
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