Tungsten Carbide Products sintering process can be divided into four basic stages:

Tungsten Carbide Manufacturers Products sintering process can be divided into four basic stages:

1: removal forming agent and presintering stage, at this stage sintered body changes as follows:
Early removal of forming agent, sintering with the increase of temperature, molding agent gradually break down, or vaporization, out of the sintered body, at the same time, forming agent was more or less to increase carbon sintered body, increases the amount of carbon will vary depending on the type, quantity and sintering process of the forming agent of change.
Powder surface oxide reduction in sintering temperature, hydrogen can be reduction of cobalt and tungsten oxide, if removing vacuum forming agent and sintering, carbon and oxygen reaction is not strong. Contact stress between the powder particles gradually eliminate, bonding metal powder to produce replies and recrystallization, surface diffusion began, briquetting strength increased.

2: solid phase sintering stage (800 ℃ -- eutectic temperature)
Before a liquid temperature, in addition to continue to what happened to the last stage, the process of the solid diffusion instead should intensify, plastic flow, sintered body appear obvious shrinkage.

Stage 3: the liquid phase sintering (eutectic temperature, sintering temperature)
When in liquid phase sintered body contraction finished quickly, and then produce crystalline transformation, form the basic organization and structure of the alloy.
Stage 4: cooling (sintering temperature, room temperature)
At this stage, the organization of the alloy composition and phase change with the different cooling condition and produce some, can make use of this characteristic, the hard alloy heat treatment to improve its physical and mechanical properties.

K034 Tungsten Carbide Tips used as mining inserts for Carbide Chisel and Rock Auger Teeth.-Six Star Hardmetal


K034 Carbide Chisel - Six Star Hardmetal