Alloys of Fe, Cr, Si, Y and Al

Details Alloys of Fe, Cr, Si, Y and Al Alloys of Fe, Cr, Si, Y and Al

1979-04-13

1980-10-28

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22C 3902

Patent

active

042304890

ABSTRACT:
Certain alloys of iron, chromium, aluminium and yttrium are known e.g. from U.S. Pat. No. 3,027,252 and from U.K. Pat. No. 1,045,993 and are stated to be high temperature, oxidation resistant alloys.
The invention relates to alloys of iron, chromium, aluminium and yttrium containing additionally certain proportions of silicon. Thus, the alloys of the invention comprise from 15 to 25% Cr, 4 to 5.5% Al, 0.01 to 3% Y, 0.3 to 5% Si and the balance Fe, where all proportions are by weight. The corrosion resistance of the alloys increases as the percentage of Si increases to reach a peak at about 1% Si. The preferred range of Si is 0.5 to 2%. All proportions are by weight.

REFERENCES:
patent: 2580171 (1951-12-01), Hagglund et al.
patent: 2635164 (1953-04-01), Rehnqvist et al.
patent: 3027252 (1962-03-01), McGurty et al.
patent: 3298826 (1967-01-01), Wukusick
patent: 3852063 (1974-12-01), Niimi et al.

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