Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Reexamination Certificate
2004-04-28
2008-12-30
Sheehan, John P. (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
C148S306000
Reexamination Certificate
active
07470333
ABSTRACT:
A non-oriented electrical steel sheet is characterized in that the number density of inclusions with an equivalent volume diameter of less than 100 nm contained in the steel sheet is 1×1010[/mm3] or less, and that the steel sheet contains, by mass %, C: up to 0.01%, Si: 0.1% to 7.0%. Al: 0.1% to 3.0%. Mn: 0.1% to 2.0%, REM: 0.0003% to 0.05%. Ti: up to 0.02%. S: up to 0.005%. and N: up to 0.005%. the balance Fe and inevitable impurities and the mass % of Al represented by [Al] and the mass % of Ti represented by [Ti] satisfy the equation log([Ti]×[N])−1.19×log([Al]×[N])+1.84>0 . . . (1).
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Arita Yoshihiro
Kiyose Akihito
Kubota Takeshi
Kurosaki Yousuke
Miyamoto Ken-ichiro
Dorsey & Whitney LLP
Nippon Steel Corp.
Sheehan John P.
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