17/18/19 inch 5-hole 5x 108/112/114.3/120 car alloy wheel rims

The effect of temperature on wheel heart crack

The temperature of the production model of low -pressure forging determines the condensate of the alloy liquid, and directly affects the internal and appearance state of the cast. It is one of the primary reasons for the number deviation and deformation of the casting. It also has a great impact on productivity. The temperature of the production model has changed with changes in the weight of the casting, the die -casting cycle, the die -casting temperature, and the cooling pattern of production model.

From the perspective of heat transfer, increasing the temperature of the production model can reduce the heat exchange intensity between the metal and the production model, and extend the flow time. There are also research expressions that improve the temperature of the production model and also reduce the interface tension between metal fluid and casting. With the increase of the temperature of the production model, the filling time is slightly reduced, that is, the filling capacity increases with the increase in the temperature of the production model. Therefore, the appropriate increase in the temperature of the production model can help reduce the stress. If the production model is too low, the casting is cooled in the metal type too fast, and the condensation speed between the various parts of the castings will make Uniform cooling. The resulting stress and deformation results causes heat cracks and large residual stress and residual deformation on the casting products, but the high tactical temperature is unlucky than the formation of a small crystal tissue. Qi and tightening increase the opportunities of flaws such as qi eye, flushing, and shrinkage of the castings. In order to unify this officer, it is possible to improve the temperature of the production model in an environment without forging defects.