1. Wear resistance
When the blank in the stamping cavity is plastic, the surface of the cavity is both lively and slippery, resulting in a sharp conflict between the caries and the blank surface, which then causes the mold to become ineffective under the condition of wear and tear. Therefore, the wear resistance of the data is one of the basic and important functions of the mold.
Hardness is the main factor affecting wear resistance. Generally speaking, the higher the hardness of the mold parts, the smaller the degree of wear, and the better the degree of wear. In addition, wear resistance is also related to the variety, quantity, shape, size and dispersion of carbides.
2. Strong patience
Most of the stamping parts are processed in a bad working environment, some of which are usually subjected to huge impact loads, which then lead to brittle cracking. In order to prevent the sudden brittleness of the mold parts during operation, the mold should have high strength and endurance.
The resistance of the mold depends on the carbon content, particle size and placement of the data.
3. The function of fatigue and cracking
During stamping processing, the long-term effects of cyclic stress often lead to fatigue cracking. The method has small energy repeated impact fatigue crack, tensile fatigue crack and contact fatigue crack and winding fatigue crack. The fatigue decomposition function of mold depends on its strength, resistance, hardness, and content of inclusions.
4. High temperature effect
When the temperature of stamping parts is high, the hardness and strength will decrease, resulting in wear of the mold or plastic deformation. Therefore, the mold data should have high temperature stability to ensure that the mold has high hardness and strength at operating temperature.
5, cold and heat exhaustion function.
Under the conditions of processing and cooling of stamping parts, some molds appear during operation, which makes the surface tension, pressure and stress of the cavity affect the appearance and loss of cracks, increases friction, prevents plastic deformation, and reduces measurement. accuracy, which in turn leads to mold failure. Cold and heat exhaustion is one of the main methods of thermal die failure, and the thermal die should have higher thermal fatigue and fatigue properties.
6. Corrosion resistance
There are some molds in stamping parts processing, such as plastic molds, because the composition of plastic is chlorine, fluorine, thermal decomposition after separation, strong corrosive gas, such as the appearance of high-frequency corrosion mold cavity, increase surface roughness, increase wear and tear .
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