Metal treatment – Compositions – Heat treating
Patent
1979-05-11
1981-03-10
Rutledge, L. Dewayne
Metal treatment
Compositions
Heat treating
75126R, 75123L, 148111, H01F 104
Patent
active
042552150
ABSTRACT:
This is a low-alloy iron having desirable magnetic characteristics suitable for electrical applications such as transformer cores. This material has improved texture and reduced core losses. The alloys contain 0.6-1.0% silicon and 0.4-0.8% chromium along with controlled levels of manganese, sulfur, carbon and oxygen. These alloys are preferably processed to about 0.006 inch (0.015 cm) final gauge using schedules with three coldrolling steps. B.sub.10 values above 19 kG and 17 kG losses below 0.72 watts per pound are obtained with these alloys.
REFERENCES:
patent: 436497 (1890-09-01), Hadfield et al.
patent: 3368887 (1968-02-01), Enis et al.
patent: 3849212 (1974-11-01), Thornburg
patent: 3881967 (1975-05-01), Cochardt et al.
patent: 3892604 (1975-07-01), Thornburg
patent: 3892605 (1975-07-01), Thornburg
"Development of (110) [001] Texture in Low-Alloy Iron by Primary Recrystallization and Normal Grain Growth", vol. 8A, Jan. 1977, Metallurgical Trans.
"Magnetic Properties of (110) [001] Oriented Low-Alloy Iron " American Institute of Physics Conference Proceedings-21st Annual Conference, Phila. 1975.
Foster Karl
Rauch Gary C.
Thornburg Donald R.
Rutledge L. Dewayne
Sheehan John P.
Stoltz R. A.
Westinghouse Electric Corp.
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