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1 Design principles for the shape of the inner cavity of the copper mould tube in the  high-efficiency billet continuous casting machine

The shape of the inner cavity of the copper mould tube of the high-efficiency billet continuous casting machine is designed according to the solidification characteristics of the continuous casting billet. Two aspects are mainly considered: one is near the meniscus, due to the large heat flux density and heat concentration, the heat deformation of the mold copper tube. The second is the shrinkage of the billet shell during the solidification process. The design principle is that the shape of the inner cavity of the mold copper tube is consistent with the shrinkage law of the solidified shell to reduce the thermal resistance of the air gap.

2 Main characteristics of high-efficiency continuous casting copper mould tube material

The requirements of high-efficiency continuous casting mold materials are good thermal conductivity, high recrystallization temperature, thermal fatigue resistance, high strength, good wear resistance and long service life.