Ferritic precipitation-hardened soft magnetic stainless steel

Details Ferritic precipitation-hardened soft magnetic stainless steel Ferritic precipitation-hardened soft magnetic stainless steel

1979-03-23

1981-04-28

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75128T, 148 37, C22C 3806

Patent

active

042643562

ABSTRACT:
A ferritic precipitation-hardened soft magnetic stainless steel is disclosed. This steel consists by weight percentage of not more than 0.1% of C, 12.0-22.0% of Cr, 1.5-6.0% of Nb, at least one of Al and Ti, provided that an amount of Al used alone is 0.5-4.0%, an amount of Ti used alone is 0.5-3.0% and an amount of Al and Ti used together is 0.5-4.0% (in the latter case, the amount of Ti does not exceed 3.0%), the remainder being Fe and incidental impurities. The steel exhibits substantially 100% ferrite phase after solution heat- and aging-treatments and has improved magnetic properties, corrosion resistance and hardness.

REFERENCES:
patent: 2614921 (1952-10-01), Tanczyn
patent: 2624668 (1953-01-01), Binder
patent: 2694626 (1954-11-01), Tanczyn
patent: 3337331 (1967-08-01), Ljungberg
patent: 3499802 (1970-03-01), Lagneborg
patent: 3658514 (1972-04-01), Lula et al.
patent: 3837847 (1974-09-01), Bieber
patent: 3865644 (1975-02-01), Hellner et al.
Metals Handbook, vol. 1, 8th ed. 1961, p. 409.
The Making, Shaping and Treating of Steel, United States Steel, 8th ed., pp. 1112-1117.

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