US4066422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear-resistant composite material and method of making an article thereof
Assignee: Caterpillar Inc
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Filing: 1975-10-02
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Granted: 1978-01-03
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Expires: 1995-10-02
Abstract
Abstract A wear-resistant composite material and method of making an article thereof is disclosed which is particularly adaptable for use with a ground-engaging tool. The composite material has a plurality of abrasive-resistant particles embedded in an iron-boron matrix.
Inventors
- 👤 Lowell J. Moen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:22
CPC Classifications
C; C22; C22C; C22C38/00; C22C33/00; C22C33/02; C22C33/0207; C22C33/0228; C22C33/0257; C22C33/0278; C22C33/0285; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
31 words
A wear-resistant composite material comprising a plurality of abrasive-resistant particles embedded in a matrix consisting essentially of about 3 to 5 percent boron, and the balance being iron having residual impurities.
Claim 2
Dependent Claim
31 words
A wear-resistant composite material comprising a plurality of abrasive-resistant particles embedded in a matrix consisting essentially of about 3 to 5 percent boron, and the balance being iron having residual impurities.
Claim 3
Independent Claim
98 words
A method of making a ferrous wear-resistant composite article comprising: placing a plurality of abrasive-resistant shot in a mold, said abrasive-resistant shot being limited in carbon content to less than 0.2% by weight; depositing a plurality of alloy shot consisting essentially of iron and boron on top of said abrasive-resistant shot, said alloy shot being limited in carbon content to less than 0.2% by weight; heating said mold in a substantially inert atmosphere to melt said alloy shot and to cause infiltration thereof fully around said abrasive-resistant shot; and cooling and removing such composite article from said mold.
Claim 4
Independent Claim
98 words
A method of making a ferrous wear-resistant composite article comprising: placing a plurality of abrasive-resistant shot in a mold, said abrasive-resistant shot being limited in carbon content to less than 0.2% by weight; depositing a plurality of alloy shot consisting essentially of iron and boron on top of said abrasive-resistant shot, said alloy shot being limited in carbon content to less than 0.2% by weight; heating said mold in a substantially inert atmosphere to melt said alloy shot and to cause infiltration thereof fully around said abrasive-resistant shot; and cooling and removing such composite article from said mold.
Claim 5
Dependent Claim
13 words
The method of claim 2 including the step of using a ceramic mold.
Claim 6
Dependent Claim
20 words
The method of claim 3 including the step of introducing a relatively limited amount of nitrogen gas into said atmosphere.
Claim 7
Independent Claim
115 words
A method of making a ferrous wear-resistant composite article for a tool or the like comprising; placing a plurality of abrasive-resistant shot in a mold; depositing a plurality of alloy shot consisting essentially of iron and boron on top of said abrasive-resistant shot; placing said mold in a chamber having an inert atmosphere; preheating said mold at approximately 1093° C (2000° F) to obtain a uniform temperature of said shot; subjecting said mold to a final heating stage at approximately 1204° C (2200° F) for a relatively short period sufficient to melt said alloy shot and to cause infiltration thereof embracingly around said abrasive-resistant shot; and cooling and removing such composite article from said mold.
Claim 8
Independent Claim
115 words
A method of making a ferrous wear-resistant composite article for a tool or the like comprising; placing a plurality of abrasive-resistant shot in a mold; depositing a plurality of alloy shot consisting essentially of iron and boron on top of said abrasive-resistant shot; placing said mold in a chamber having an inert atmosphere; preheating said mold at approximately 1093° C (2000° F) to obtain a uniform temperature of said shot; subjecting said mold to a final heating stage at approximately 1204° C (2200° F) for a relatively short period sufficient to melt said alloy shot and to cause infiltration thereof embracingly around said abrasive-resistant shot; and cooling and removing such composite article from said mold.
Claim 9
Dependent Claim
27 words
The wear-resistant composite material of claim 1 wherein said abrasive-resistant particles are metallic, said metallic particles comprising 45 to 70 percent by volume of the composite material.
Claim 10
Dependent Claim
16 words
The wear-resistant composite material of claim 1 wherein said residual impurities include less than 0.2% carbon.
Claim 11
Dependent Claim
27 words
The wear-resistant composite material of claim 7 wherein said abrasive-resistant particles are of substantially spheroidal configuration, and said matrix is a eutectic composition of iron and boron.
Claim 12
Dependent Claim
24 words
The wear-resistant composite material of claim 8 wherein said spheroidal particles are shot having diameters wherein the range of 0.5 mm to 2 mm.
Claim 13
Dependent Claim
23 words
The wear-resistant composite material of claim 8 wherein the material of said spheroidal particles is metallic and limited to less than 0.2% carbon.
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |