Carbonaceous sliding gate slide board protection coating material

Abstract

The present invention is one kind of paint for protecting carbon-containing slide board of sliding gate, and belongs to the field of paint for ferrous metallurgy. The paint consists of water solution 65-75 wt%, micro powder 25-35 wt% and small amount of cellulose dispersant and viscosity regulator, and the micro powder dispersed homogeneously inside the water solution to form suspension consists of flake graphite 50-80 wt%, alumina 5-22 wt% boron nitride 1-15 wt%, aluminum phosphate 10-22 wt%, zirconium silicate 2-5 wt%, tellurium oxide 0.1-1 wt% and small amount of impurity. The paint is coated to the surface of hot or cold slide board to form protecting film to raise the antioxidizing performance, lubricating performance and use performance of the slide board, and to increase its service life.

Description

technical field [0001] The invention belongs to iron and steel metallurgical coatings, in particular to a protective coating used for sliding nozzle slides. Background technique [0002] The sliding nozzle is the key device in the molten steel casting process, and the sliding plate is the core component of the sliding nozzle device. 2 o 3 -C quality, Al 2 o 3 -SiO 2 -Carbon-containing functional materials mainly of C quality, the damage forms of the skateboard that are often seen in use are: roughening of the skateboard surface accounts for 40% to 60%, cracks and peeling account for 10% to 20%, and casting hole expansion accounts for 20 to 40%. %; Decarburization caused by the reaction of carbon in the skateboard with oxygen in the air or oxygen in molten steel is one of the main causes of damage to the skateboard. On the other hand, once the surface is decarburized, the opening aperture on the surface of the slide plate becomes larger, and under the action of hydrostat...

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Problems solved by technology

The use of this lubricating coating improves the lubricity of the skateboard and improves the performance of the skateboard. However, due to the high cost of graphite colloidal granulation and poor oxidation resistance, it cannot be widely used.

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