Sintered alloy for cutting tools

Details Sintered alloy for cutting tools Sintered alloy for cutting tools

1976-10-13

1977-09-13

Hunt, Brooks H.

Stock material or miscellaneous articles

Metal continuous phase interengaged with nonmetal continuous...

C22C 2900

Patent

active

040478971

ABSTRACT:
A sintered alloy for cutting tools comprising 60 to 90% by weight of a carbide comprising Mo.sub.2 C, WC and TiC in the proportions shown by the tetragonal region surrounded by points A, B, C and D in the ternary composition diagram of FIG. 1, the proportion of the sum of WC and Mo.sub.2 C with a WC/Mo.sub.2 C weight ratio of 35:65 to 65:35 being 50 to 75% by weight, and the proportion of TiC being 25 to 50% by weight,
3 to 20% by weight of a nitride selected from the group consisting of TiN, TaN or a mixture of TiN and TaN, and
5 to 20% by weight of Ni, Co or a mixture of Ni and Co as a binder metal,
And further comprising a solid solution phase of the carbide and nitride with a grain size of not more than 1.3 .mu. and a binder metal phase.

REFERENCES:
patent: 3492101 (1970-01-01), Prill et al.
patent: 3679442 (1972-07-01), Bergna
patent: 3741733 (1973-06-01), Kieffer
patent: 3840367 (1974-10-01), Rudy
patent: 3994692 (1976-11-01), Rudy
patent: 3999954 (1976-12-01), Kolaska et al.

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