Alloy steel powders, sintered bodies and method

Details Alloy steel powders, sintered bodies and method Alloy steel powders, sintered bodies and method

1995-02-22

1997-02-25

Wyszomierski, George

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

75254, 420106, 420107, 420109, 420110, 420111, C22C 3824, C22C 3846

Patent

active

056055595

ABSTRACT:
Alloy steel powders capable of obtaining high strength in a sintered state and having excellent compacting compressibility and methods of manufacturing a sintered body. The alloy steel powder comprises, by wt %, about 0.5-2% of Cr, not greater than about 0.08% of Mn, about 0.1-0.6% of Mo, about 0.05-0.5% of V, not greater than about 0.015 of S, not greater than about 0.2% of O, and the balance being Fe and incidental impurities. The alloy steel powder is compacted and sintered at a temperature of about 1100.degree.-1300.degree. C. and then cooled at a cooling rate no higher than about 1.degree. C./s in a temperature range of from about 800.degree. C. to 400.degree. C. The alloy steel powder can contain Nb and/or Ti and one or more of Co, W and B. Additionally, Ni powder and/or Cu powder may be adhered and dispersed onto the surface of the alloy steel powder.

REFERENCES:
patent: 4266974 (1981-05-01), Nitta et al.
patent: 5458670 (1995-10-01), Ogura et al.

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