Claims
- 1. A method of making a binder phase enriched cemented carbide insert by sintering a cemented carbide containing a nitrogen-containing material in a vacuum or inert atmosphere, the improvement wherein after the sintering, the insert is heat treated in nitrogen at 40-400 mbar at a temperature of 1280.degree.-1430.degree. C. for a time of 5-100 min.
- 2. The process of claim 1 wherein the insert is heat treated in nitrogen at 150-300 mbar.
- 3. The process of claim 2 wherein the insert is heat treated at a temperature is between 1320.degree.-1400.degree. C.
- 4. The process of claim 3 wherein the insert is heat treated for a time of 10-15 minutes.
- 5. The process of claim 1 wherein the cemented carbide has a content of cubic phase of 8-15 weight % and is heat treated in nitrogen gas for 5-50 minutes at a temperature of 1280.degree.-1320.degree. C. at a pressure of 50-150 mbar.
- 6. The process of claim 1 wherein the cemented carbide has a content of cubic phase of 6-10 weight % and is heat treated in nitrogen gas for 5-50 minutes at a temperature of 1350.degree.-1380.degree. C. and a pressure of 250-350 mbar.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9200530 |
Feb 1992 |
SEX |
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Parent Case Info
This application is a divisional of application Ser. No. 08/258,598, filed Jun. 10, 1994, U.S. Pat. No. 5,549,980. Which is a continuation of application Ser. No. 08/019,701, filed Feb. 19, 1993 abandoned.
US Referenced Citations (11)
Divisions (1)
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Date |
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258598 |
Jun 1994 |
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Continuations (1)
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Date |
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19701 |
Feb 1993 |
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