Main factors affecting the hardness of mold parts


With the development of 4.0 industry, industrial produc […]

With the development of 4.0 industry, industrial production and people's lives are inseparable from the application of molds, and mold parts are closely related to molds as an important part of the mold. Mold parts are widely used in various types of manufacturing, such as plastic molds, stamping dies, automotive, electrical and aerospace. The quality characteristics of the mold parts are determined by the quality and service life of the mold. The wear resistance of the mold parts absolutely affects the characteristics of the mold parts. In general, the higher the hardness of the mold parts, the smaller the wear amount and the better the wear resistance. In addition, the wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
1. Strong toughness
Most of the working conditions of the mold are very bad, and some often suffer from a large impact load, resulting in brittle fracture. In order to prevent the mold parts from suddenly breaking during work, the mold must have high strength and toughness. The toughness of the blow molds depends mainly on the carbon content, grain size and microstructure of the material.
2. Wear resistance
When the blank is plastically denatured in the mold cavity, it flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the blank, which causes the mold to fail due to wear. Therefore, the wear resistance of the material is one of the most basic and important properties of the mold.
3. Fatigue fracture performance
During the working process, the mold parts often cause fatigue fracture under the long-term effect of cyclic stress. The form has small energy multiple impact fatigue fracture, tensile fatigue fracture contact fatigue fracture and bending fatigue fracture.