Patent ID: 11965227
Assignee: CHONGYI ZHANGYUAN TUNGSTEN CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 3:
4. The preparation method of the metal ceramic according to claim 3, characterized in that the step S3 specifically comprises:
S31. placing the green compact under a vacuum atmosphere, and raising the temperature from room temperature to 1200 to 1350° C.;
S32. under the pressure condition of 1 to 200 mbar, sintering under micro-pressure under at least one process gas of nitrogen and inert gas, and keeping the temperature for 30 to 90 min;
S33. raising to the final sintering temperature of 1400 to 1500° C. at a heating rate of 5 to 10° C./min, and then keeping the temperature in vacuum for 0.5 to 1.0 h;
S34. in at least one process gas of 1 to 10 MPa nitrogen or inert gas, keeping the temperature for 0.5 to 2.0 h at the final sintering temperature;
S35. cooling to 1200° C. at a cooling rate of 3 to 10° C./min under a protective atmosphere of 10 to 200 mbar;
S36. rapid cooling to room temperature to obtain a metal ceramic.