Cemented carbide is mainly used for cold wire drawing dies,
cold punching dies, cold extrusion mode, cold heading dies and other cold stamping molds.
Under the wear-resistant working conditions which have a strong impact, the tungsten carbide cold heading mould is required to have a good impact toughness, fracture toughness, fatigue strength, bend intensity and excellent wear resistance. Usually, among grades of high cobalt and medium, crude granules, the YG15C is commonly adopted.
In general, the relationship between the carbide wear resistance and carbide toughness is contradictory. The increase in wear resistance will result in a decrease in toughness and the increase in toughness will inevitably lead to a decrease in wear resistance. Therefore, when choosing a cemented grade, it is necessary to meet specific usage requirements based on the processing objects and processing conditions.
If the selected grade is easy to occur early cracks, it is advisable to use a grade with high toughness. if the selected grades is easily damaged due to the early wear, it is appropriate to choose a grade with a higher hardness and better wear resistance. The following grades of YG15C, YG18C, YG20C, YL60, YG22C, YG25C have a gradual decrease in hardness and wear resistance and gradually improving toughness.
