I believe everyone is more interested in the control of the carbon content of carbide ball. Next, I will reveal the answer for you!
In order to reasonably control the carbon content in tungsten carbide balls, two carbon control methods are usually used in the powder preparation of ordinary cemented carbide balls: using unsaturated carbon WC and saturated carbon WC as raw material powders.
The first method is to add a small amount of carbon black to the powder during the batching to achieve the purpose of carbon control, but this is likely to cause carbon segregation during wet grinding and abnormal growth of WC grains during sintering; it can also be mixed with forming agents Adjust the amount of glue in the process and control the degumming process of the sintering process to meet the requirements of carbon increase. However, if the amount of glue is too much, the debinding will not be complete, which will cause the porosity of the alloy to increase and adversely affect the performance of the cemented carbide ball. .
The second method is mainly to add W powder during the batching to control the total carbon of the mixture. This method has simple process and good process stability. It has no special requirements for forming agents and sintering equipment. It is a high-quality hard material with stable production quality. An effective method for alloy balls. In addition, in order to reduce the sensitivity of cemented carbide balls to carbon content, a small amount of two-phase zone widening agents, such as TaC, TiC, NbC, Ni, etc., can be added to the powder. At the same time, rare earth will also affect the carbon content in the cemented carbide ball, because the rare earth will exist in the alloy as RE2C3, and the addition of rare earth will reduce the effective carbon content in the alloy.
Hope this information will help you!