The appearance shape of the mould copper tube is generally a square copper tube bent to one side, and the inner cavity is tapered from top to bottom, there is two-cone, three-cone and multiple-cone.

Then why does the mould copper tube adopt such a shape feature?

The main consideration is that during the solidification of the casting embryo, the shape of the cavity of the mould copper tube and the shrinkage law of the embryo shell during solidification remain consistent, thereby reducing the thermal resistance of the gap between them.

The mould copper tube is a very important part of the continuous casting machine, which is equivalent to the human heart, and there must be no flaws or incompleteness. As a heat conduction component, after the hot molten steel in the cavity is gradually cooled, the heat is transferred in, and the cooling water outside the tube circulates the heat to realize heat conduction. Therefore, under the violent heat exchange environment with such continuous high temperatures, the material requirements of the mould copper tube are very strict. There can be neither crystal softening nor plastic deformation.

Through software analysis, we can get the following experimental data:

The temperature field of the wall surface of the 10mm copper mould of molten steel with 0.2% carbon content, the peak temperature of the hot surface of the mold is 525K, and the peak temperature of the cold surface is 475K; the deformation of the outer wall of the mold is 0.789mm, which is larger than the deformation of the inner wall; The maximum equivalent stress and maximum strain of the mold appear at the fillet of the inner wall where the molten steel is in contact with air, which is 218 MPa and 0.002079, respectively.
From the above data, it can be concluded that the mold temperature, deformation, and stress meet the safety requirements of continuous casting.