Factory direct selling alloy wheels 18 inch 4X100 4X114.3 5X112 5X120 car wheels

The effect of temperature on wheel cracks
The temperature of the mold of low -voltage casting determines the solidification method of the alloy liquid, and directly affects the internal and surface conditions of the cast. It is one of the main reasons such as the size deviation and deformation of the casting. It also has a great impact on productivity. The mold temperature changes with the weight of the casting, the die -casting cycle, the die -casting temperature, and the mold cooling method.
From the perspective of heat transfer, increasing the temperature of the mold can reduce the heat exchange intensity between the metal and the mold, and extend the flow time. Some studies have shown that improving the temperature of the mold can also reduce the interface tension between metal fluid and casting. As the temperature of the mold increases, the filling time decreases slightly, that is, the filling capacity increases as the mold temperature increases. Therefore, the appropriate increase in the temperature of the mold is conducive to the reduction of stress. If the mold temperature is too low, the casting is cooled in the metal type too fast, and the solidification speed between the various parts of the castings will cause the cooling of the casting in the cast mold to be uneven and generate. Thermal stress and deformation, the result leads to generating heat cracks and large residual stress and residual deformation on the finished finished finished product. The tantrum temperature is not conducive to the small tissue of crystals. Opportunities for defects such as pores, flushing, and shrinkage have increased. In order to unify this contradiction, the mold temperature can be appropriately increased without casting defects.