Explanation

During the solidification process of alloy materials, due to the liquid shrinkage, solidification shrinkage and gas escape in the final solidification area, the porous area and holes in this area are irregular, and the dense distribution of holes can also be dispersed. According to the location of porosity, porosity can be divided into central porosity and general porosity. porosity will reduce the efficiency of spare filling and air tightness of castings; At the same time, porosity will significantly reduce the strength of the casting. porosity is a major solidification defect. The degree of porosity can be reduced by adjusting the composition of alloy and improving the solidification process. porosity can also be significantly reduced by using die-casting T process and dynamic soft reduction technology during continuous casting. porosity in the casting billet can be eliminated by subsequent rolling or forging.

Classification