Shape Feature
The shape of mould copper tube generally is a square tube which is bent to one side or copper tube, the inner cavity is conical from top to bottom, which can be divided into two cone surfaces, three cone surfaces or multi cone surfaces. During the solidification process of the casting embryo, the shape of the inner cavity of the copper tube is consistent with the shrinkage law of the shell, so as to reduce the thermal resistance of the gap between them
The decisive factors of material selection
Due to the contact between the inner part of copper tube and high temperature molten steel, There will be large temperature difference between the inner and outer surface of copper tube, high thermal stress and high variability. The shape of the inner cavity of copper tube is very important, Only when the shape of the inner cavity of copper tube is consistent with the shape of the solidified shell, can the air gap be small and uniform, Therefore, the material of copper tube is required to have strong thermal deformation resistance, it means high recrystallization temperature, low coefficient of thermal expansion, good thermal conductivity and high thermal fatigue strength.