Claims
- 1. Method of manufacturing a sintered carbonitride alloy comprising:
- wet milling of powders forming binder phase containing Co and/or Ni and powder forming hard constituents of carbonitrides and nitrides with titanium as the main component to a mixture with desired composition;
- compacting said mixture to form compacts;
- and sintering after dewaxing said compacts by heating a) in oxygen or air at 100.degree.-300.degree. C. for 10-30 minutes, b) in vacuum to 1100.degree.-1200.degree. C., c) in vacuum at about 1200.degree. C. for about 30 minutes, d) in deoxidizing H.sub.2 -atmosphere for 15-30 minutes at about 1200.degree. C., e) in N.sub.2 -atmosphere during heating to sintering temperature 1400.degree.-1600.degree. C., and f) cooling to room temperature in vacuum or inert gas.
- 2. The method of manufacturing a sintered carbonitride alloy of claim 1 wherein during step e), the nitrogen content is gradually reduced to zero and Ar is added.
- 3. The method of manufacturing a sintered carbonitride alloy of claim 6 wherein the powder forming hard constituents also includes at least one of Zr, Hf, V, Nb, Ta, Cr, Mo and W.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9101591 |
May 1991 |
SEX |
|
Parent Case Info
This application is a divisional of application Ser. No. 07/886,876, filed May 22, 1992, U.S. Pat. No. 5,330,553.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
3528308 |
May 1986 |
DEX |
1499278 |
Jan 1978 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
886876 |
May 1992 |
|