CNC - Manufacturing method of Tungsten Carbide-Nickel sintered body for Computerized numerical control plasma holder processing

摘要

The present invention is an input step of introducing a raw material powder in which a powder of tungsten carbide (WC) and nickel (Ni) is mixed at a predetermined ratio into a high-strength stainless container, and mixing and pulverizing the raw material powder in the container. A pulverization step of generating, the drying step of drying the mixed powder in a closed atmosphere in an atmosphere of vacuum or inert gas for a predetermined period of time, filling the mixed powder pulverized through the crushing step inside the graphite mold, and setting a predetermined pressure. As a pre-pressurizing step of pre-pressurizing the mixed powder to be evenly distributed, a mounting step of connecting a plurality of energizing means to the pressing part or the graphite mold so that a DC pulse current can be energized inside the hermetic sintering chamber, the sintering chamber Is a vacuuming step of adjusting the inside to a vacuum of 6 Pa or less in a closed state, pressurizing the mixed powder with a constant pressure through the pressing part, applying a current to each of the energizing means to a set temperature according to a preset pattern It includes a sintering step of sintering the mixed powder into a sintered body while heating and reducing the temperature, and a cooling step of isothermal cooling the graphite mold between 600 and 1000° C. while maintaining the pressure applied to the sintered body under reduced pressure. Consists of a plurality of energizing means and has at least three or more coupling points, respectively connected to the left and right sides of the pressing part and the graphite mold based on the pressing part, and the DC pulse current is energized multiple times in each of the graphite mold and the pressing part. Disclosed is a method for manufacturing a tungsten carbide-nickel sintered body for CNC plasma holder processing in which the mixed powder is heated to a target temperature in a short time to sinter.