1. Wear resistance
The wear resistance of a dual color mold is essential as it undergoes plastic deformation in the mold cavity. As the billet flows and slides along the surface of the cavity, it causes intense friction between the surfaces, leading to wear and tear of the mold. The hardness of the material is a crucial factor that affects the wear resistance of the mold. Generally, the higher the hardness of the dual color mold parts, the lower the wear amount, and better the wear resistance. The wear resistance also depends on the type, quantity, morphology, size, and distribution of carbides in the material. Therefore, having a thorough understanding of these factors is critical when selecting a material for the dual color mold.
2. Strong resilience
The working environment of dual color molds can be quite demanding, as they often have to withstand significant impact loads, which can result in them becoming brittle and breaking. Therefore, toughness and strength are critical properties that dual color molds must possess in order to prevent unexpected fractures while in operation. The toughness of a dual color mold is determined by various factors, such as the carbon content, microstructure, and grain size of the material used in its construction.
3. Fatigue fracture performance
Fatigue fractures are a common issue encountered in dual color molds during their working process, primarily caused by prolonged exposure to cyclic stress. These fractures can take various forms, including small energy multiple impact fatigue fractures, tensile fatigue fractures, contact fatigue fractures, and bending fatigue fractures. The performance of fatigue fractures in dual color molds relies heavily on the material's strength, toughness, hardness, and the presence of inclusions.
4. High temperature performance
To ensure the optimal performance of a dual color mold, it is crucial to pay attention to its working temperature. Exposure to high temperatures can lead to a reduction in hardness and strength, causing the mold to wear out prematurely or even deform. It is, therefore, essential to use a mold material that exhibits high tempering stability. This ensures that the dual color mold maintains its high levels of hardness and strength even when subjected to high working temperatures. By doing so, you can increase the mold's lifespan and prevent potential failures.
5. Cold and hot fatigue resistance
Repeated heating and cooling during the working process can be harmful to dual color molds, as it causes tensile and compressive stress on the mold cavity's surface. This stress can lead to surface cracking and peeling, increase friction, hinder plastic deformation, reduce dimensional accuracy, and ultimately render the dual color mold unusable. Cold and hot fatigue is the most common form of failure in hot working molds. As a result, dual color molds must exhibit high resistance to cold and hot fatigue to avoid such failures.
6. Corrosion resistance
During the operation of some dual color molds, such as those made of plastic, the chlorine and fluorine elements present in the plastic can cause the mold to decompose and release highly corrosive gases such as HCI and HF. This can result in the corrosion of the mold cavity surface, increased roughness, and heightened risk of wear and failure. Therefore, when working with dual color molds, it is crucial to utilize materials with exceptional resistance to corrosion. This will help to ensure the longevity and longevity of the mold, thereby contributing to a more efficient and reliable manufacturing process.