Hard alloy particle dispersion type wear resisting sintered ferr

Details Hard alloy particle dispersion type wear resisting sintered ferr Hard alloy particle dispersion type wear resisting sintered ferr

1989-04-14

1992-01-14

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75239, 75240, 75241, 75242, 75252, 75255, 419 14, 419 15, 419 32, 419 38, B22F 0000

Patent

active

050807137

ABSTRACT:
A material for valve seats comprising a wear resisting sintered ferro alloy formed by dispersing particles of a high speed steel in a matrix in which hard alloy particles are dispersed. Steps for forming include mixing particles of a matrix material, carbide material and a hard alloy, and blending the mixture with high speed steel particles, pressurizing and compacting the mixture after blending, then sintering them at 1000.degree. to 1200.degree. C. In the preferred method, at least one element of Fe, C, Ni, Co, Si or Mn is included as the matrix material, and at least one element of Fe, Cr, Mo or V as the carbide material and at least one element of Fe, Cr, Mo, Co, C or W as the hard alloy are prepared. Furthermore, the ferro alloy preferably includes the following amounts of the above mentioned elements, 0.5 to 2.0 wt % of C, 1 to 25 wt % of one or more of Cr, Mo, V, or W and 1 to 15 wt % of one or more of Co, Ni, Mn, or Si.

REFERENCES:
patent: 4204031 (1980-05-01), Takemura et al.
patent: 4505988 (1985-03-01), Urano et al.
patent: 4552590 (1985-11-01), Nakata et al.

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