US4584020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear part with high wear strength
Assignee: Santrade Ltd
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Filing: 1983-12-05
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Granted: 1986-04-22
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Expires: 2003-12-05
Abstract
Abstract In wear parts consisting of sintered cemented carbide and cast alloy on iron base, in which a wear resistant layer of cast-in-carbide is formed in the most exposed parts of the product, the chipping of cemented carbide from the wear layer can be essentially eliminated according to the invention by applying a layer of another metallic material, for example steel, between the cast alloy and the wear layer.
Inventors
- 👤 Mats G. Waldenstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/06; E; E01; E01H; E01H5/00; E01H5/04; E01H5/06; E01H5/061; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12146
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
Wear part with high wear strength combined with high mechanical strength and toughness, comprising a base portion comprising an iron-base alloy, a wear-resistant portion comprising cemented carbide particulates embedded in said iron-base alloy and an intermediate portion being at least 0.3 mm thick between at least a part of the wear-resistant portion and the base portion of a metal or metal alloy having a toughness greater than that of the iron-base alloy of the base portion.
Claim 2
Dependent Claim
76 words
Wear part with high wear strength combined with high mechanical strength and toughness, comprising a base portion comprising an iron-base alloy, a wear-resistant portion comprising cemented carbide particulates embedded in said iron-base alloy and an intermediate portion being at least 0.3 mm thick between at least a part of the wear-resistant portion and the base portion of a metal or metal alloy having a toughness greater than that of the iron-base alloy of the base portion.
Claim 3
Dependent Claim
17 words
Wear part according to claim 1 wherein the cast alloy is made up of a cast iron.
Claim 4
Dependent Claim
13 words
Wear part according to claim 1 wherein the metallic material is a steel.
Claim 5
Dependent Claim
19 words
Wear part according to claim 1 wherein the melting point of the metallic material is at least 50° C.
Claim 6
Dependent Claim
13 words
Wear part according to claim 2, wherein the metallic material is a steel.
Claim 7
Dependent Claim
19 words
Wear part according to claim 2, wherein the melting point of the metallic material is at least 50° C.
Claim 8
Dependent Claim
19 words
Wear part according to claim 3, wherein the melting point of the metallic material is at least 50° C.
Claim 9
Dependent Claim
17 words
Wear part according to claim 2, wherein the cast iron alloy is an essentially graphitic cast iron.
Claim 10
Dependent Claim
23 words
Wear part according to claim 4, wherein the melting point of the metallic material is 200°-400° C. above that of the cast alloy.
Claim 11
Dependent Claim
23 words
Wear part according to claim 5, wherein the melting point of the metallic material is 200°-400° C. above that of the cast alloy.
Claim 12
Dependent Claim
23 words
Wear part according to claim 6, wherein the melting point of the metallic material is 200°-400° C. above that of the cast alloy.
Claim 13
Dependent Claim
23 words
Wear part according to claim 7, wherein the melting point of the metallic material is 200°-400° C. above that of the cast alloy.
Claim 14
Dependent Claim
16 words
Wear part according to claim 1, wherein the said intermediate portion if from 1-8 mm thick.
Claim 15
Dependent Claim
25 words
Wear part according to claim 13, wherein the thickness of the base portion in which the wear-resistant portion is embedded is at least 1 mm.
References Cited (Backward Citations)
US4312894A
Cited
US4119459A
Cited
US4066451A
Cited
US4101318A
Cited
US4177324A
Cited
US4443255A
Cited
US4446196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |