Abstract A sintered alloy for cutting tools comprising 60 to 90% by weight of a carbide comprising Mo 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 2 C with a WC/Mo 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 μ and a binder metal phase.
Inventors
👤 Hiroshi Tanaka
👤 Osamu Kato
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-28 23:59
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A sintered alloy for cutting tools consisting essentially of 60 to 92% by weight of a carbide comprising Mo 2 C, WC and TiC in the proportions shown by the tetragonal region A, B, C and D in the ternary composition diagram of FIG. 1, the proportion of the sum of WC and Mo 2 C with a WC/Mo 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 wherein the carbide and nitride are in the form of a solid solution phase nitride with a grain size of not more than 1.3 μ and a binder metal phase.
Claim 2
Dependent Claim
158 words
A sintered alloy for cutting tools consisting essentially of 60 to 92% by weight of a carbide comprising Mo 2 C, WC and TiC in the proportions shown by the tetragonal region A, B, C and D in the ternary composition diagram of FIG. 1, the proportion of the sum of WC and Mo 2 C with a WC/Mo 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 wherein the carbide and nitride are in the form of a solid solution phase nitride with a grain size of not more than 1.3 μ and a binder metal phase.