Annealing separator for heat treatment of silicon steel sheets

Details Annealing separator for heat treatment of silicon steel sheets Annealing separator for heat treatment of silicon steel sheets

1974-05-31

1976-05-11

Satterfield, Walter R.

Metal treatment

Compositions

Heat treating

148 315, 148 3155, 148113, B23K 3524

Patent

active

039560295

ABSTRACT:
Annealing separator for heat treatment of a silicon steel sheet comprising not more than 0.2% SO.sub.3, not more than 0.04% Cl with the balance being MgO and unavoidable impurities, and having a bulk density between 0.18 and 0.30 g/cm.sup.3, and a particle size distribution of 40 to 70% of particles not larger than 3.mu.m, 10 to 25% of particles not smaller than 10.mu.m, not more than 15% of coarse particles larger than 15.mu.m with the balance being intermediate particles between 3.mu.m and 10.mu.m.

REFERENCES:
patent: 2354123 (1944-07-01), Horstman et al.
patent: 2906645 (1959-09-01), Carpenter et al.
patent: 3186867 (1965-06-01), Forslund et al.
patent: 3653984 (1972-04-01), Urushiyama et al.
patent: 3700506 (1972-10-01), Tanaka et al.
Merk Index; New Jersey, 1940, p. 330.

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