Iron base sintered alloy with hard particle dispersion and metho

Details Iron base sintered alloy with hard particle dispersion and metho Iron base sintered alloy with hard particle dispersion and metho

1997-01-22

1999-01-12

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75246, 419 14, 419 29, C22C 3302, B22F 312

Patent

active

058593764

ABSTRACT:
An iron base sintered alloy with dispersed hard particles is provided which comprises by weight 3 to 15% nickel (Ni), 0.5 to 5% chromium (Cr), 0.5 to 2.0% carbon (C), the remainder iron (Fe) and unavoidable impurities. At least a part of nickel (Ni), molybdenum (Mo) and chromium (Cr) is contained in solid solution of an iron base matrix. At least a part of molybdenum (Mo) and chromium (Cr) is dispersed within the iron base matrix to form fine carbides or intermetallic compounds thereof. Uniformly dispersed within the iron base matrix are hard particles of 3 to 20% contain 50 to 57% chromium (Cr), 18 to 22% molybdenum (Mo), 8 to 12% cobalt (Co), 0.1 to 1.4% carbon (C), 0.8 to 1.3% silicon (Si) and the remainder iron (Fe) to strengthen the dispersion and remarkably improve wear resistance.

REFERENCES:
patent: 4080205 (1978-03-01), Niimi et al.
patent: 4274876 (1981-06-01), Kodama et al.
patent: 4505988 (1985-03-01), Urano et al.
patent: 4836848 (1989-06-01), Mayama et al.
patent: 4915735 (1990-04-01), Motooka
patent: 5080713 (1992-01-01), Ishibashi et al.

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