Claims
- 1. A process of forming an amorphous boron-carbon alloy containing cutting tool bit comprising filling a tool bit die with an amorphous boron-carbon alloy and binder and subjecting the mixture to heat and pressure sufficient to form the cutting tool bit.
- 2. A process of forming an amorphous boron-carbon alloy cutting tool bit comprising filling a cutting tool bit die with a mixture of cobalt and tungsten carbide powder, compacting said powder at at least 1000 psi without heating, filling the die with a mixture of cobalt and tungsten carbide and at least 5% by weight amorphous boron-carbon alloy, and compressing the total die contents at at least 1000 psi at 1350.degree. to 1500.degree. C. to form said tool bit.
- 3. A process of forming an amorphous boron-carbon alloy tool bit comprising filling a graphite die 0.2 inch deep and 0.5 inch internal diameter with a mixture of tungsten carbide and 5 to 10% cobalt by weight, compacting the mixture without heating at 2000 psi, filling the die with a mixture of tungsten carbide, 5 to 10% cobalt by weight and 2 to 16% amorphous boron-carbon alloy, compressing the entire die contents at 1350.degree. to 1500.degree. C. and 2000 psi to form said tool bit, removing the tool bit from the die, and polishing the tool bit with diamond paste.
- 4. The process of claims 1, 2 or 3 wherein the process is carried out at such pressure, temperature and time so as to produce a tool of such hardness as to be capable of cutting IN100 nickel superalloy at 150 surface feet per minute for over 4 minutes.
- 5. The process of claims 1, 2 or 3 wherein the amorphous boron-carbon alloy powder additionally contains ZrH.sub.2.
- 6. The process of claim 1 wherein the process is a multi-step process and the first step comprises a cold compression of a mixture of cobalt, and tungsten carbide prior to filling the die with the amorphous boron-carbon alloy.
- 7. The process of claims 2 or 6 wherein the cobalt in the first step comprises 5 to 10% by weight of the tungsten carbide containing mixture.
- 8. The process of claim 3, wherein the amorphous boron-carbon alloy additional contains cobalt, and tungsten carbide.
- 9. The process of claims 1 or 2 wherein the amorphous boron-carbon is present in the powder mixture in amounts of 2 to 16% by weight.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a division of application Ser. No. 12,930 filed on Feb. 16, 1979.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
2356009 |
Schwarzkopf |
Aug 1944 |
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4225355 |
Galasso et al. |
Sep 1980 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
379681 |
Aug 1932 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
12930 |
Feb 1979 |
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