Excellent machinability is achieved.
In addition to CNC machine tool processing, the majority of aluminum alloy die-casting molds require some cutting and fitter repair to function properly. Optimal hardness of steel for plastic molds is essential for extending the service life of cutting tools, improving cutting performance, and reducing surface roughness. This is especially important in zinc alloy die casting supplier plants, where excessive consumption of cutting tools can lead to tool failure.
Exceptional polishing performance
For high-quality aluminum alloy die castings, a low roughness value of the cavity surface is necessary. So the aluminum alloy die casting factory must polish its cavities in order to reduce their surface roughness values. So the steel that was chosen requires fewer impurities, has a fine and uniform structure, does not have fiber directivity, and does not develop pitting or orange peel defects during polishing.
Surface hardness and wear resistance that are sufficient
The surface hardness of the mold after heat treatment must be sufficient to ensure that the mold retains its rigidity after heat treatment. In order for the die to function properly during the filling and flow of aluminum alloy liquid, which must withstand significant pressure and friction, it must maintain the stability of shape accuracy and dimensional accuracy, as well as ensure that the die has a sufficient service life during the work cycle.
The chemical composition of the steel and the hardness achieved through heat treatment determine the wear resistance of the die. As a result, increasing the hardness of the die is beneficial in terms of increasing its wear resistance.
Additionally, when selecting materials, it is necessary to take into account the possibility of scratching and gluing. Try to avoid selecting materials that have the same organizational structure as the two surfaces if there is a significant amount of relative movement between them. In some cases, one side can be plated or nitrided in order to achieve a difference in surface structure between the two sides.
It is suggested that the zinc slag produced by the die casting factory should not be treated by the factory itself. Reason 1: Smelting zinc slag produces a great deal of smoke and dust, necessitating a significant investment in environmental protection equipment as well as a high price tag. Reason 2: When the smelting process and operation are not standardized, it is easy to cause the quality of alloy material to be compromised, resulting in a high number of casting defects produced by die casting and a higher production cost.