High Al heat-resistant alloy steels having Al coating thereon

Details High Al heat-resistant alloy steels having Al coating thereon High Al heat-resistant alloy steels having Al coating thereon

1983-12-30

1985-08-13

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428681, 420584, 75124, C23C 108

Patent

active

045350345

ABSTRACT:
A high-Al heat resistant steel comprising a base steel containing not more than 0.7% C, not more than 3.0% Si, not more than 2.0% Mn, 10 to 40% Ni, 9 to 30% Cr, 2 to 8% Al, with balance being Fe and unavoidable impurities, and an Al coating formed on the base steel. The Al coating diffuses into the base steel to form an intermediate Al alloyed layer during the Al coating or by heating after the coating, which alloyed layer prevents the Al coating from spalling, thus providing excellent resistance to oxidation, corrosion, carburization, nitrization and sulphurdization at elevated temperatures.

REFERENCES:
patent: 1706130 (1929-03-01), Ruder
patent: 3989514 (1976-11-01), Fujioka et al.
patent: 4086085 (1978-04-01), McGurty
patent: 4248629 (1981-02-01), Pons et al.
patent: 4357394 (1982-11-01), Khandros

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