The purpose of cemented carbide sintering is to turn the porous powder compact into a dense alloy with certain organizational structure and properties;
When cemented carbide powder mixtures with different compositions are compacted and sintered, a microstructure that is completely or approximately represented by the phase diagram can be obtained.
Sintering is the last key step in the production of cemented carbide. Although the structure and properties of the alloy depend on many process factors before sintering, the sintering process still has a significant or even decisive impact on it.
The sintering process of cemented carbide is relatively complex, involving both physical changes and chemical reactions, but it is mainly a physical process, including the densification of the sintered body, the growth of carbide grains, changes in the composition of the bonding phase, and the formation of the alloy microstructure. , as well as the reduction of oxides, the escape of gases, the migration of substances, etc.
Post time: Jan-07-2024
