Patent US4576875A successfully refreshed from Google Patents.
US4576875A
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Weldable wear part with high wear resistance
Assignee: Santrade Ltd
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Filing: 1981-06-17
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Granted: 1986-03-18
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Expires: 2001-06-17
Abstract
Abstract A wear part with high wear and abrasion resistance combined with unlimited weldability and good mechanical strength or toughness, comprising a composite part of hard metal portion, a cast metal alloy body portion and attached thereto to joining portion, characterized in that the joining portion consists essentially of a weldable steel which by casting is bonded to the cast metal alloy body portion to a combined mechanical-metallurgical bond is provided, as well as a method for forming such a wear part.
Inventors
- 👤 Olle G. Olsson
- 👤 Melih Yaman
- 👤 Mats G. Waldenstrom
- 👤 Udo K. R. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:15
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/06; G; G01; G01B; G01B11/00; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/783; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
Wear part with high wear and abrasion resistance combined with good weldability and good mechanical strength or toughness, comprising a composite part of hard metal portion, a cast iron body portion and a joining portion, characterized in that the joining portion consists essentially of a weldable steel which by casting is bonded to the cast iron body portion by a combined mechanical-metallurgical bond.
Claim 2
Dependent Claim
63 words
Wear part with high wear and abrasion resistance combined with good weldability and good mechanical strength or toughness, comprising a composite part of hard metal portion, a cast iron body portion and a joining portion, characterized in that the joining portion consists essentially of a weldable steel which by casting is bonded to the cast iron body portion by a combined mechanical-metallurgical bond.
Claim 3
Dependent Claim
25 words
Wear part according to claim 1, wherein the cast iron consists essentially of graphitic cast iron having a carbon equivalent of from 3.5 to 6.0.
Claim 4
Dependent Claim
23 words
Wear part according to claim 1, wherein the weldable steel is an unalloyed or low alloyed steel with a carbon content <0.2% C.
Claim 5
Dependent Claim
18 words
Wear part according to claim 3, wherein the composition of the weldable steel is adjusted so that %C+%Mn/6+(%Cr+%Mo+%V)/5+(%Ni+%Cu)/15<0.41.
Claim 6
Dependent Claim
30 words
Wear part according to claim 1, wherein the weldable steel is bonded by protrusions from the surface of weldable steel portion which form undercuts with the cast iron body portion.
Claim 7
Independent Claim
95 words
A method for forming a wear part with high wear and abrasion resistance combined with good weldability and good mechanical strength or toughness which comprises providing in a mold a hard metal portion and spaced therefrom a weldable steel portion, said weldable steel portion including means to be embedded in a resulting cast iron portion for enhancing the mechanical bond between the weldable steel portion and the cast iron portion and casting a metal alloy in said mold to encase the said hard metal portion and the weldable steel portion into a unitary wear part.
Claim 8
Independent Claim
95 words
A method for forming a wear part with high wear and abrasion resistance combined with good weldability and good mechanical strength or toughness which comprises providing in a mold a hard metal portion and spaced therefrom a weldable steel portion, said weldable steel portion including means to be embedded in a resulting cast iron portion for enhancing the mechanical bond between the weldable steel portion and the cast iron portion and casting a metal alloy in said mold to encase the said hard metal portion and the weldable steel portion into a unitary wear part.
Claim 9
Dependent Claim
30 words
A method for forming a wear part according to claim 6, wherein the cast iron consists essentially of graphitic cast iron having a carbon equivalent of from 3.5 to 6.0.
Claim 10
Dependent Claim
27 words
A method for forming a wear part according to claim 6, wherein the weldable steel is an unalloyed or low alloyed steel with a carbon content <0.2%C.
Claim 11
Dependent Claim
23 words
A method for forming a wear part according to claim 8, wherein the composition of the weldable steel is adjusted so that %C+%Mn/6+(%Cr+%Mo+%V)/5+(%Ni+%Cu)/15<0.41.
Claim 12
Dependent Claim
35 words
A method for forming a wear part according to claim 6, wherein the weldable steel is bonded by protrusions from the surface of weldable steel portion which form undercuts with the cast iron body portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |