1. Wear resistance
When the blank is deformed in the mold cavity, it flows and slides along the cavity surface, causing severe friction between the cavity surface and the blank, which causes the mold to fail due to wear. So the wear resistance of the material is the most basic and most important performance of the mold.
Hardness is the main factor affecting wear resistance. Under normal circumstances, the higher the hardness of mold parts, the smaller the wear, wear resistance is also better. In addition, the wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
Mold working conditions are mostly very bad, and some often bear a greater impact load, resulting in brittle fracture. In order to prevent the mold parts in the work suddenly brittle fracture, the mold to have a high strength and toughness.
The toughness of the mold depends mainly on the carbon content of the material, grain size and tissue state.
3. Fatigue fracture performance
Mold work in the process, the long-term role in the cyclic stress, often lead to fatigue fracture. Its form has a small energy multiple impact fatigue fracture, tensile fatigue fracture contact fatigue fracture and bending fatigue fracture.