Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1983-09-21
1986-11-18
Sheehan, John P.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148308, 420117, H01F 104
Patent
active
046234063
ABSTRACT:
The present invention relates to a method for producing a grain-oriented electrical steel sheet.
A feature of the present invention is to set S.ltoreq.0.007%, Mn=0.08.about.0.45%, P=0.015.about.0.45% in a slab. The present inventive idea does away with the conventional concept of using MnS as an inhibitor. The present invention present incomplete secondary recrystallization by the S content, which is decreased to a level as low as possible. In addition, a product having a high magnetic flux density can be successfully produced by adding appropriate amounts of Mn and P. Due to these advantages a high Si content of a slab, which leads to a watt loss reduction, can also be employed in the present invention. Furthermore, the watt loss of a product produced by a low-temperature slob-heating is considerably lower than a product produced by a high-temperature slab-heating.
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Matsumoto Fumio
Nakayama Tadashi
Suga Yozo
Nippon Steel Corporation
Sheehan John P.
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