Metal treatment – Compositions – Heat treating
Patent
1976-08-02
1978-01-17
Stallard, W.
Metal treatment
Compositions
Heat treating
148 16, C21D 174
Patent
active
040690695
ABSTRACT:
The discoloration or off-luster border area known as "annealing border", which may form on low-carbon steel strip during box annealing of coils in commercial HNX atmospheres is eliminated by (a) subjecting the strip to oxidizing conditions such that the coil edges undergo a weight gain of 0.08 to 0.8 mg/cm.sup.2 of strip surface and (b) reducing the so-formed oxide during box annealing.
REFERENCES:
patent: 2656285 (1953-10-01), Burns et al.
patent: 3215566 (1965-11-01), Mayer
patent: 3355265 (1967-11-01), Hudson et al.
patent: 3406047 (1968-10-01), Magor et al.
Hudson Robert M.
Oles, Jr. Edward J.
Warning Clair John
Grief Arthur J.
Stallard W.
United States Steel Corporation
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