Metal treatment – Compositions – Heat treating
Patent
1979-11-27
1981-09-01
Roy, Upendra
Metal treatment
Compositions
Heat treating
148113, 106 58, 106 62, C04B 3504, B23K 3524
Patent
active
042870062
ABSTRACT:
An annealing separator useful for producing a grain oriented silicon steel strip having an excellent magnetic property, comprises non-hydrating magnesium oxide which has been calcined at a temperature of 1300.degree. C. or more, preferably, from 1300.degree. to 2100.degree. C., and which is in the form of fine particles, 70% by weight of which have a size of 5 microns or less, and optionally, magnesium hydroxide in an amount of 1 to 100% based on the weight of the magnesium oxide and/or an aluminium compound in an amount of 0.05 to 10% based on the weight of the magnesium oxide.
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Hiromae Yoshitaka
Nakamura Kazuo
Nitto Hajime
Nippon Steel Corporation
Roy Upendra
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