| (19) |
 |
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(11) |
EP 0 130 674 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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15.05.1985 Bulletin 1985/20 |
| (43) |
Date of publication A2: |
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09.01.1985 Bulletin 1985/02 |
| (22) |
Date of filing: 02.05.1984 |
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| (84) |
Designated Contracting States: |
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BE DE FR GB IT SE |
| (30) |
Priority: |
05.07.1983 US 510844
|
| (71) |
Applicant: ALLEGHENY LUDLUM STEEL CORPORATION |
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() |
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| (72) |
Inventor: |
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- Malagari, Frank Angelo, Jr.
()
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| |
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| (54) |
Process for producing cube-on-edge oriented electromagnetic silicon steel |
(57) A method is provided for producing electromagnetic silicon steel to produce a cube-on-edge
grain orientation having lower core losses and higher magnetic permeability. The method
includes, during final texture annealing, using a controlled heating cycle including
an isothermal hold at a selected recrystallization temperature of about 1650°F (900°C)
for 6 to 20 hours to improve secondary recrystallization and the Goss texture (110)
[001 then heating the steel from the selected recrystallization temperature to in
excess of 2000° F (1093°C).