Protection method of copper plate in mold accessoriesThe copper plate of the mold accessories is an important heat conducting part in the continuous casting pr
Protection method of copper plate in mold accessories
The copper plate of the mold accessories is an important heat conducting part in the continuous casting process, and its quality directly affects the surface quality of the cast slab, the casting speed of the continuous casting machine and other indicators. For this reason, we need to take some measures to ensure its wear resistance, which can extend the service life of the entire equipment and improve the quality of work.
1.Metal plating layer. According to the combination of the deposited metal elements, the metal coating can be divided into single metal coating, alloy metal coating and composite coating. By adding metals with different properties, an alloy coating was developed on the basis of a single metal coating. Incorporating the second phase particles into the metal or alloy can obtain a composite coating with excellent performance. There are Ni plating layer, Ni-Cr layer, Co-Ni layer and so on.
2. Spray coating. The spray coating can be obtained on the surface of the workpiece using thermal spraying technology. The specific method is to heat the sprayed material to a molten or semi-molten state, atomize and accelerate it with a high-speed airflow, and spray it on the surface of the workpiece at a high speed. The spray coating materials include powders, wire-like metals, cermets and other solids, which can be processed to form metal alloy layers, ceramic coatings and cermet coatings.
3. Laser cladding layer. The laser cladding layer is irradiated by a high-energy laser beam, and the material is rapidly melted, expanded and solidified. After complex physical, chemical and metallurgical changes, a layer of composite material with special chemical and mechanical properties is formed on the surface of the substrate. The laser cladding layer applied to the surface modification of the mold assembly is divided into a pure metal cladding layer and a composite layer with an enhanced phase.
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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