Common sense of mold copper tube Shape feature  The appearance of the copper tube of the mold is generally a square tube or a copper tube that
Common sense of mold copper tube
Shape feature
The appearance of the copper tube of the mold is generally a square tube or a copper tube that is bent to one side. During the solidification of the casting blank, the shape of the inner cavity of the crystal copper tube and the shrinkage law during solidification of the embryo shell remain consistent, thereby reducing the thermal resistance of the gap between them.
The determinants of material selection
Because the inside of the copper pipe is in contact with high-temperature molten steel, the temperature difference between the inner and outer surfaces of the copper pipe is large, the thermal stress is high, and it is extremely volatile. The shape of the inner cavity of the copper tube is very important. It is necessary to protect the inner cavity shape of the copper tube to match the shape of the crystal solidified blank shell to make the air gap small and uniform. Therefore, the copper tube material is required to have strong thermal deformation resistance, that is, it is required High recrystallization temperature, low thermal expansion coefficient, good thermal conductivity, high thermal fatigue strength, etc.
Nickel-cobalt-tungsten alloy plating on the inside and outside of the crystal copper tube-electroplating process
Common knowledge of crystallizer copper tube: A nickel-cobalt-tungsten alloy coating with a thickness of 0.5mm is plated on the inner and outer surfaces of the crystallizer copper tube, and then a hard chromium coating with a thickness of 0.08-0.12mm is plated after polishing. The core technology of the process is to use a hollow profiling anode, with many small holes on the profiling anode surface. During plating, a circulating pump is used to indirectly spray the plating solution through the hollow anode to the cathode surface, so that the metal ions can act on the electric field. It quickly accumulates on the surface of the cathode.
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Harm of too high temperature: when molten steel out of cooper mold, the billet shell is thin and easy to break out; The accelerated erosion of refractory can ea
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1. The barrier function (mainly completed by the liquid slag layer) isolates the contact between air and molten steel, blocks the secondary oxidation of molten
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In continuous casting, low corrosion resistance often occurs, which directly leads to uneven composition and will eventually affect the smelting quality. In or