US5066546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear-resistant steel castings
Assignee: Kennametal Inc
•
Filing: 1989-12-08
•
Granted: 1991-11-19
•
Expires: 2009-12-08
Abstract
Abstract A tough, wear resistant body is provided. The body includes hard carbide particles embedded in and bonded with a first casted ferrous matrix material such as steel or cast iron. The body may be embedded in and bonded with a second steel matrix to form a wear resistant composite. The second steel matrix has a melting point at least 200 degrees F. greater than the melting point of the first ferrous matrix, thereby facilitating a metallurgical bond between the surface of the wear resistant body and the second steel matrix. The composite structure is particularly suitable for earthmoving and other severe mechanical applications.
Inventors
- 👤 James P. Materkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:31
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/14; E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/285; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958; Y10T428/12965; Y10T428/12972
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
A tough, wear resistant body comprising: (a) at least one layer of a carbide material selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, niobium carbide, zirconium carbide, vanadium carbide, hafnium carbide, molybdenum carbide, chromium carbide, boron carbide, silicon carbide, their mixtures, solid solutions, and cemented composites; (b) a casted steel matrix material, wherein said carbide material is embedded in and bonded to said casted steel matrix; and (c) wherein said steel matrix has a carbon equivalent value of between 1.5 and 2.5.
Claim 2
Dependent Claim
86 words
A tough, wear resistant body comprising: (a) at least one layer of a carbide material selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, niobium carbide, zirconium carbide, vanadium carbide, hafnium carbide, molybdenum carbide, chromium carbide, boron carbide, silicon carbide, their mixtures, solid solutions, and cemented composites; (b) a casted steel matrix material, wherein said carbide material is embedded in and bonded to said casted steel matrix; and (c) wherein said steel matrix has a carbon equivalent value of between 1.5 and 2.5.
Claim 3
Dependent Claim
21 words
The wear resistant body according to claim 1, wherein said carbide material has an average particle size greater than 4 mesh.
Claim 4
Dependent Claim
23 words
The wear resistant body according to claim 2, wherein said carbide material has an average particle size between 4 mesh and 3/8 inch.
Claim 5
Dependent Claim
27 words
The wear resistant body according to claim 2, wherein said carbide material is in the form of crushed parts, powder or pressed bodies having an irregular shape.
Claim 6
Dependent Claim
24 words
The wear resistant body according to claim 1, wherein said steel matrix has a hardness value of between 35 and 45 R c .
Claim 7
Dependent Claim
23 words
The wear resistant body according to claim 1, wherein said steel matrix has a melting point of between 2400 and 2600 degrees F.
Claim 8
Dependent Claim
17 words
The wear resistant body according to claim 1, wherein said steel matrix is more than 90% dense.
Claim 9
Dependent Claim
119 words
A tough, wear resistant composite body comprising: (a) at least one layer of a carbide material selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, niobium carbide, zirconium carbide, vanadium carbide, hafnium carbide, molybdenum carbide, chromium carbide, boron carbide, silicon carbide, their mixtures, solid solutions, and cemented composites; (b) a first casted steel matrix material, wherein said carbide material is embedded in and bonded to said first casted steel matrix to form a wear resistant body; and (c) a second steel matrix, having a melting point at least 200 degrees F. greater than the melting point of said first steel matrix, wherein said wear resistant body is embedded in and bonded to said second steel matrix.
Claim 10
Dependent Claim
119 words
A tough, wear resistant composite body comprising: (a) at least one layer of a carbide material selected from the group consisting of tungsten carbide, titanium carbide, tantalum carbide, niobium carbide, zirconium carbide, vanadium carbide, hafnium carbide, molybdenum carbide, chromium carbide, boron carbide, silicon carbide, their mixtures, solid solutions, and cemented composites; (b) a first casted steel matrix material, wherein said carbide material is embedded in and bonded to said first casted steel matrix to form a wear resistant body; and (c) a second steel matrix, having a melting point at least 200 degrees F. greater than the melting point of said first steel matrix, wherein said wear resistant body is embedded in and bonded to said second steel matrix.
Claim 11
Dependent Claim
19 words
The wear resistant composite according to claim 8, wherein said second steel matrix substantially surrounds said wear resistant body.
Claim 12
Dependent Claim
27 words
The wear resistant composite according to claim 8, wherein said carbide material is in the form of crushed parts, powder or pressed bodies having an irregular shape.
Claim 13
Dependent Claim
28 words
The wear resistant composite according to claim 8, wherein said second steel matrix is a low carbon steel having a carbon content of less than 1.0 wt. %.
Claim 14
Dependent Claim
25 words
The wear resistant composite according to claim 11, wherein said second steel matrix has a hardness value of between 40 and 50 R c .
Claim 15
Dependent Claim
26 words
The wear resistant composite according to claim 11, wherein said low carbon second steel matrix has a melting point of between 2700 and 2800 degrees F.
Claim 16
Dependent Claim
18 words
The wear resistant composite according to claim 8, wherein said second steel matrix is more than 90% dense.
Claim 17
Dependent Claim
17 words
The wear resistant body according to claim 1, wherein said steel matrix is an austenitic manganese steel.
References Cited (Backward Citations)
US1310528A
Cited
US1072026A
Cited
US2298049A
Cited
US3744547A
Cited
US3779715A
Cited
US4024902A
Cited
US4119459A
Cited
US4146080A
Cited
AU3136277A
Cited
US4101318A
Cited
US4140170A
Cited
US4249945A
Cited
JPS57160564A
Cited
US4608318A
Cited
US4584020A
Cited
JPS60124458A
Cited
DE3515975A1
Cited
JPS61245958A
Cited
US4612067A
Cited
US4715450A
Cited
EP0451842A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |