Patent US4145213A successfully refreshed from Google Patents.
US4145213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant alloy
Assignee: Sandvik AB
•
Filing: 1976-05-17
•
Granted: 1979-03-20
•
Expires: 1996-05-17
Abstract
Abstract The alloy of the invention is of the type wherein 30-70% by volume of hard components are homogeneously dispersed in a matrix of binder metal (Fe, Co or Ni). The hard components are carbides or carbonitrides and/or borides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W. The mean grain size of the hard component particles is between 0.01 and 1.0 micron and their grain size distribution, represented by the standard deviation S, in which S2</=(M/1+1.5 Mz)2 mu m2, not more than 15% of the grains are larger than 1.2 microns.
Inventors
- 👤 Rolf G. Oskarsson
- 👤 Carl S. G. Ekemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:19
CPC Classifications
C; C22; C22C; C22C29/00; C22C32/00; C22C32/0047
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
265 words
An alloy consisting essentially of from 30 to 70 volume percent of grains of hard components in a metal binder, the hard components being predominantly nitride and/or carbonitrides and consisting essentially of a compound of at least one member of the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W and at least one member of the group consisting of C, N and B, in which alloy the molar ratio of N to N plus C is at least 0.6, the hard components have a mean grain size M within the range of 0.04 to 0.70 microns and a grain size distribution represented by the standard deviation S in which S 2 = ( m )/(1+ 1.5M 2 )μm 2 , the number of hard component grains being greater than 1.2 μm being 15 percent or less, the metal binder consisting essentially of Fe, Co or Ni and containing 10 atomic percent max. Al, 15 atomic percent max. Mn, 4 atomic percent max. Si and 1 atomic percent max. Cu, the molar ratio (Ti + Zr + Hf + V + Nb + Ta + Cr + Mo + W + Al): (Fe + Co + Ni + Mn) being in the range of from 0.25 to 0.70, the molar ratio of (V + Nb + Ta + Cr + Mo + W): (Ti + Zr + Hf) being 0 to 1 and the molar ratio of (Ti + Zr + Hf + V + Nb + Ta): (Cr + Mo + W) in the hard components being greater than 25.
Claim 2
Dependent Claim
265 words
An alloy consisting essentially of from 30 to 70 volume percent of grains of hard components in a metal binder, the hard components being predominantly nitride and/or carbonitrides and consisting essentially of a compound of at least one member of the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W and at least one member of the group consisting of C, N and B, in which alloy the molar ratio of N to N plus C is at least 0.6, the hard components have a mean grain size M within the range of 0.04 to 0.70 microns and a grain size distribution represented by the standard deviation S in which S 2 = ( m )/(1+ 1.5M 2 )μm 2 , the number of hard component grains being greater than 1.2 μm being 15 percent or less, the metal binder consisting essentially of Fe, Co or Ni and containing 10 atomic percent max. Al, 15 atomic percent max. Mn, 4 atomic percent max. Si and 1 atomic percent max. Cu, the molar ratio (Ti + Zr + Hf + V + Nb + Ta + Cr + Mo + W + Al): (Fe + Co + Ni + Mn) being in the range of from 0.25 to 0.70, the molar ratio of (V + Nb + Ta + Cr + Mo + W): (Ti + Zr + Hf) being 0 to 1 and the molar ratio of (Ti + Zr + Hf + V + Nb + Ta): (Cr + Mo + W) in the hard components being greater than 25.
Claim 3
Dependent Claim
22 words
Alloy according to claim 1 in which 0 to 20 percent of the amount of C, N and/or B consists of 0.
Claim 4
Dependent Claim
55 words
Alloy according to claim 1, which consists of 15-30 atomic-% Ti, Zr and/or Hf, 15-33 atomic-% C and/or N; ≦ 6 atomic-% Cr; ≦ 6 atomic-%; ≦ 4 atomic-% W; ≦12 atomic-% Co;≦3 atomic-% Ni; ≦4 atomic-% Si; ≦2 atomic-% Mn; and the remainder Fe, in which normally present low contents of impurities are included.
Claim 5
Dependent Claim
48 words
Alloy according to claim 1, which consists of 18- 30 atomic-% Ti, Zr and/or Hf; 15-33 atomic-% C and/or N; 2-15 atomic-% Mn; ≦3 atomic-% Cr ≦ 3 atomic-% Mo; ≦ 3 atomic-% Ni; and the remainder Fe, in which normally present low contents of impurities are included.
Claim 6
Dependent Claim
49 words
Alloy according to claim 1, which consists of 12-30 atomic-% Ti, Zr and/or Hf; 12-33 atomic-% C and/or N; ≦16 atomic-% Cr; ≦ 10 atomic-% W; ≦10 atomic-% Mo; ≦10 atomic-% Al; and the remainder Fe, Co and/or Ni, in which normally present low contents of impurities are included.
Claim 7
Dependent Claim
24 words
Alloy according to claim 1, in cutting insert of the composition of FIG. 1 after 20 minutes of cutting time in a particular test.
Claim 8
Dependent Claim
13 words
FIG. (matrix) amounts to at least 50% by weight of the total alloy.
Claim 9
Dependent Claim
13 words
FIG. (matrix) amounts to at least 50% by weight of the total alloy.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |