US4290807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard alloy and a process for the production of the same
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1978-09-13
•
Granted: 1981-09-22
•
Expires: 1998-09-13
Abstract
Abstract This invention relates to a hard alloy consisting of a metallic phase and a hard phase having a B1 type crystal structure, and being represented by the following general formula, (M1a, M2b, M3c)(C1-x-yNyOx)z in which M1 is at least one of Group IVa elements, M2 is at least one of Group VIa elements, M3 is at least one of Group Va elements, C is carbon, N is nitrogen, O is oxygen, a, b, c, x and y are respectively atomic ratios satisfying the relations of a+b+c=1, 0.1</=(a+c)/a+b+c)</=0.7 (c can be zero), 0.05</=x</=0.5, 0</=y</=0.5, 0.05</=x+y</=0.6 and z is an atomic ratio of (C+N+O)/M1+M2+M3) satisfying the relation of 0.1</=z</=0.5.
Inventors
- 👤 Tsuyoshi Asai
- 👤 Naoji Fujimori
- 👤 Takaharu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:47
CPC Classifications
C; C22; C22C; C22C29/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
A sintered hard alloy consisting of a metallic phase and a hard phase having a B1 type crystal structure and being represented by the following general formula: (M.sub.1a, M.sub.2b)(C.sub.1-x-y, N.sub.y, O.sub.x).sub.z in which M 1 is at least one of the Group IVa elements, M 2 is at least one of the Group VIa elements, C is carbon, N is nitrogen, O is oxygen, a, b, x and y are respectively atomic ratios satisfying the relations of a+b=1, 0.1≦a/(a+b)≦0.7, 0.08<x ≦0.5, 0≦y≦0.5 and 0.05≦x+y≦0.6 and z is an atomic ratio of (C+O+N)/(M 1 +M 2 ) satisfying the relation of 0.1≦z≦0.5.
Claim 2
Dependent Claim
101 words
A sintered hard alloy consisting of a metallic phase and a hard phase having a B1 type crystal structure and being represented by the following general formula: (M.sub.1a, M.sub.2b)(C.sub.1-x-y, N.sub.y, O.sub.x).sub.z in which M 1 is at least one of the Group IVa elements, M 2 is at least one of the Group VIa elements, C is carbon, N is nitrogen, O is oxygen, a, b, x and y are respectively atomic ratios satisfying the relations of a+b=1, 0.1≦a/(a+b)≦0.7, 0.08<x ≦0.5, 0≦y≦0.5 and 0.05≦x+y≦0.6 and z is an atomic ratio of (C+O+N)/(M 1 +M 2 ) satisfying the relation of 0.1≦z≦0.5.
Claim 3
Dependent Claim
20 words
The sintered hard alloy as claimed in claim 1, wherein M 2 is at least one of tungsten and molybdenum.
Claim 4
Dependent Claim
116 words
A sintered hard alloy consisting of a metallic phase and a hard phase having a B1 type crystal structure and being represented by the following general formula: (M.sub.1a, M.sub.2b, M.sub.3c)(C.sub.1-x-y N.sub.y O.sub.x).sub.z in which M 1 is at least one of the Group IVa elements, M 2 is at least one of the Group VIa elements, M 3 is at least one of the Group Va elements, C is carbon, N is nitrogen, O is oxygen, a, b, c, x and y are respectively atomic ratios satisfying the relations of a+b+c=1, 0.1≦(a+c)/(a+b+c)≦0.7, c/(a+c)≦0.3, 0.08≦x≦0.5, 0≦y≦0.5, and 0.05≦x+y≦0.6, and z is an atomic ratio of (C+N=O)/(M 1 +M 2 +M 3 ) satisfying the relation of 0.1≦z≦0.5.
Claim 5
Dependent Claim
116 words
A sintered hard alloy consisting of a metallic phase and a hard phase having a B1 type crystal structure and being represented by the following general formula: (M.sub.1a, M.sub.2b, M.sub.3c)(C.sub.1-x-y N.sub.y O.sub.x).sub.z in which M 1 is at least one of the Group IVa elements, M 2 is at least one of the Group VIa elements, M 3 is at least one of the Group Va elements, C is carbon, N is nitrogen, O is oxygen, a, b, c, x and y are respectively atomic ratios satisfying the relations of a+b+c=1, 0.1≦(a+c)/(a+b+c)≦0.7, c/(a+c)≦0.3, 0.08≦x≦0.5, 0≦y≦0.5, and 0.05≦x+y≦0.6, and z is an atomic ratio of (C+N=O)/(M 1 +M 2 +M 3 ) satisfying the relation of 0.1≦z≦0.5.
Claim 6
Dependent Claim
20 words
The sintered hard alloy as claimed in claim 3, wherein M 2 is at least one of tungsten and molybdenum.
Claim 7
Dependent Claim
28 words
The sintered hard alloy as claimed in Claim 1, wherein rhenium is further added in a proportion of at most 2% based on all the number of atoms.
Claim 8
Dependent Claim
28 words
The sintered hard alloy as claimed in claim 3, wherein rhenium is further added in a proportion of at most 2% based on all the number of atoms.
Claim 9
Dependent Claim
37 words
The sintered hard alloy as claimed in claim 1, wherein at least one of potassium, calcium, sodium, silicon and aluminum is further added in a proportion of at most 2% based on all the number of atoms.
Claim 10
Dependent Claim
37 words
The sintered hard alloy as claimed in claim 3, wherein at least one of potassium, calcium, sodium, silicon and aluminum is further added in a proportion of at most 2% based on all the number of atoms.
Claim 11
Dependent Claim
28 words
The sintered hard alloy as claimed in claim 1, wherein at least one of the iron group metals, copper, silver and palladium is used as a sintering promoter.
Claim 12
Dependent Claim
28 words
The sintered hard alloy as claimed in claim 3, wherein at least one of the iron group metals, copper, silver and palladium is used as a sintering promoter.
Claim 13
Dependent Claim
149 words
A process for producing a sintered hard alloy represented by the following general formula: (M.sub.1a, M.sub.2b, M.sub.3c)(C.sub.1-x-y N.sub.y O.sub.x).sub.z in which M 1 is at least one of the Group IVa elements, M 2 is at least one of the Group VIa elements, M 3 is at least one of the Group Va elements, C is carbon, N is nitrogen, O is oxygen, a, b, c, x, y and z are respectively atomic ratios satisfying the relations of a+b+c=1 in which c can be zero, 0.05≦x≦0.5, 0≦y≦0.5, 0.05≦x+y≦0.6 and z is an atomic ratio of (C+N+O)/(M 1 +M 2 +M 3 ) satisfying the relation of 0.1≦z≦0.5, which comprises pressing and sintering the powdered starting materials necessary to produce the sintered alloy of the above formula, at least a part of the sintering step being carried out in an atmosphere of carbon monoxide of at least 10 -1 Torr.
Claim 14
Dependent Claim
149 words
A process for producing a sintered hard alloy represented by the following general formula: (M.sub.1a, M.sub.2b, M.sub.3c)(C.sub.1-x-y N.sub.y O.sub.x).sub.z in which M 1 is at least one of the Group IVa elements, M 2 is at least one of the Group VIa elements, M 3 is at least one of the Group Va elements, C is carbon, N is nitrogen, O is oxygen, a, b, c, x, y and z are respectively atomic ratios satisfying the relations of a+b+c=1 in which c can be zero, 0.05≦x≦0.5, 0≦y≦0.5, 0.05≦x+y≦0.6 and z is an atomic ratio of (C+N+O)/(M 1 +M 2 +M 3 ) satisfying the relation of 0.1≦z≦0.5, which comprises pressing and sintering the powdered starting materials necessary to produce the sintered alloy of the above formula, at least a part of the sintering step being carried out in an atmosphere of carbon monoxide of at least 10 -1 Torr.
Claim 15
Dependent Claim
28 words
The process as claimed in claim 11, wherein the atmosphere of carbon monoxide is kept during at least a part of the heating of at least 600° C.
Claim 16
Dependent Claim
24 words
The process as claimed in claim 11, wherein at least two of carbides, nitrides, oxides and solid solutions thereof are used as starting powders.
References Cited (Backward Citations)
US3690962A
Cited
US3779746A
Cited
US3779745A
Cited
US3723104A
Cited
US3703368A
Cited
US3708355A
Cited
US3994692A
Cited
US4049876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |