Comparison of traditional technology and new technology in repairing copper mould tubeThe copper mould tube is the core component of the continuous casting ma
Comparison of traditional technology and new technology in repairing copper mould tube
The copper mould tube is the core component of the continuous casting machine. In the steelmaking process, due to the erosion of molten steel, the mould tube part will wear out. After a long time, it is necessary to replace or repair the copper mould tube.
The traditional repair process is:
Plating removal - fine polishing - drawing - machining - electroplating - processing - inspection and packing. Usually after 6-8 times of repeated processing, repair and use, the copper mould tube can no longer be used.
The process of repairing with new technology is:
copper mould tube chromium removal - processing (drawing) - copper plating on the outer surface (using special copper plating additives for copper mould tube) - processing - NiCo alloy electroplating (composite plating additives) - chrome plating processing - polishing . Using additive copper plating can ensure high dimensional accuracy, low internal stress, good bonding force, good toughness and fast heat dissipation. The plating speed is also relatively fast.
Saving resources and reusing existing resources are the current steel products' attempts to reduce production costs and improve efficiency. Although some steel plants now repair copper mould tubes through traditional techniques, the repair volume only accounts for a few ten thousandths of the copper mould tubes. However, using new technology to repair the copper mould tube, it will be used forever.
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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