Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1989-07-17
1990-10-16
Morris, Theodore
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
H01F 104
Patent
active
049631977
ABSTRACT:
A grain oriented electromagnetic steel sheet having a very low iron loss is obtained by subjecting a surface of base metal in the sheet after finish annealing to a particular mechanical polishing and has a surface roughness having a center-line average roughness of not more than 0.3 .mu.m after the polishing and the number of abrasive grains embedded in a layer just beneath polished surface of not more than 20,000 grains/cm.sup.2.
Inokuti Yukio
Ishitobi Hirotake
Kobayashi Yasuhiro
Nakahara Hisanao
Nishiike Ujihiro
Kawasaki Steel Corp.
Meza Felisa
Miller Austin R.
Morris Theodore
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