US3779745A
Expired / Lapsed
US
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Carbide alloys suitable for cutting tools and wear parts
Assignee: Aerojet Rocketdyne Inc
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Filing: 1972-09-07
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Granted: 1973-12-18
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Expires: 1992-09-07
Abstract
Abstract This invention relates to refractory metal bonded carbide alloys for use as cutting tools and in other applications where high hardness and abrasion resistance are required. The desired finegrain, lamellar microstructure is obtained preferably by casting eutectic, or near-eutectic composition alloys of a Group IVa metal (titanium, zirconium, hafnium), tungsten and carbon which may contain certain alloying and inert materials. For selected applications, the composites may be fabricated by powdermetallurgical techniques.
Inventors
- 👤 E Rudy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:10
CPC Classifications
C; C30; C30B; C30B21/00; C30B21/02; C22; C22C; C22C1/00; C22C1/10; C22C1/1036; C22C1/1068; C22C29/00; C22C29/02; C22C29/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
A cast carbide quaternary composition of the elemental formula: ((Hfa)(Zrb))-W-(Cq) which consists essentially of Hafnium, Zirconium, Tungsten, and Carbon wherein a is the atomic percentage of Hf b is the atomic percentage of Zr q is the atomic percentage of C wherein 15 < or = a+b < or = 40 15 < or = q < or = 30 the balance being tungsten.
Claim 2
Dependent Claim
203 words
A cast carbide composition of a higher order than quaternary of the elemental formula: ((Tia)(Zrb))-((W)(X)(Cr)(R)) -Cq which consists essentially of at least Titanium, Zirconium, Tungsten and Carbon wherein a is the atomic percentage of Titanium b is the atomic percentage of Zirconium q is the atomic percentage of Carbon X is at least 1 element selected from the group consisting of Molybdenum and Rhenium, said X being present in the range of from 0 to about 20 At. percent; Cr is present in the range of from 0 to about 10 At. percent R is at least 1 element selected from the group consisting of Vanadium, Niobium, and Tantalum, said R being present in the range of from 0 to about 5 At. percent, wherein 10 < or = a+b < or = 40 20 < or = q < or = 30 when the fraction a/(a+b) is equal to 1/2 or greater than 1/2 and 15 < or = a+b < or = 40 15 < or = q < or = 30 when the fraction a/(a+b) is less than 1/2 the balance being w when a/a+b is equal to, greater than, or less than 1/2 ; the balance being tungsten. -
Claim 3
Dependent Claim
147 words
A cast carbide composition of a higher order than quarternary of the elemental formula: ((Hfa)(Zrb)) - ((W)(X)(Cr)(R)) - Cq which consists essentially of at least Hafnium, Zirconium, Tungsten and Carbon, wherein a At. percent of Hf b At. percent of Zr q At. percent of C X is at least 1 element selected from the group consisting of Molybdenum and Rhenium, said X being present in the range of from 0 to about 20 At. percent; Cr is present in the range of from 0 to about 10 At. percent; R is at least 1 element selected from the group consisting of Vanadium, Niobium, and Tantalum, said R being present in the range of from 0 to about 5 At. percent and wherein 15 < or = a+b < or = 40 At.% 15 < or = q < or = 30 At.% the balance being tungsten.
Claim 4
Dependent Claim
43 words
A cast carbide quaternary composition of the elemental formula Ti-Zr-W-C wherein Ti is present at about 20.5 atomic percent Zr is present at about 2.5 atomic percent W is present at about 52 atomic percent C is present at about 25 atomic percent.
References Cited (Backward Citations)
US3554737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |