Manufacturing method of metal ceramic coating crystallizer copper plate
A technology of cermet coating and crystallizer copper plate, which is applied in the field of continuous casting molds, can solve the problems of increasing the difficulty of orthopedic treatment, poor wear resistance, poor corrosion resistance, and reducing the hardness of copper substrates, and achieves excellent wettability and filling Gap capacity, long spraying distance, and enhanced cohesive strength
Active Publication Date: 2010-02-03
SHOUGANG CORPORATION
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Problems solved by technology
In recent years, the use of electroplating to treat the surface of the mold has greatly improved the wear resistance and corrosion resistance of the mold, improved the quality and productivity of the slab, saved costs, and extended the service life of the mold, but at present The various coatings have certain deficiencies and defects to varying degrees.
Such as the coating is too thin, easy to fall off, wear-resistant, poor corrosion resistance, complicated process, serious pollution, etc.
Invention patent CN 101302619A announced the "supersonic spraying method for mold
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] 1) Pre-treat the surface of the crystallizer copper plate before spraying, first purify the surface of the workpiece to be sprayed with acetone, and thoroughly remove the oil and paint attached to the surface of the workpiece; then use 20 mesh brown corundum for sandblasting roughening treatment, Remove oxides on the surface of the substrate and increase the adhesion of spraying;
[0015] 2) Prepare Cr on the surface of the copper crystallizer by supersonic flame spraying equipment 3 C 2 -25NiCr alloy coating, spraying repeatedly until the coating thickness is about 1mm, measure the temperature of the copper plate in time during the spraying process, and take cooling measures to ensure that the temperature of the back of the copper plate is about 100°C.
[0016] 3) Use rosin oil binder with silver-based solder and Cr 3 C 2 -25NiCr powder is mixed to make a paste slurry, which is coated on the Cr 3 C 2 -25NiCr coating, the thickness is 0.3mm, brush a layer of rosin ...
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Abstract
The invention provides a manufacturing method of metal ceramic coating crystallizer copper plate, belonging to the technical field of continuous casting crystallizer. The invention comprises the following steps: firstly pretreating the surface of the base material; carrying out purifying treatment on the surface of to-be-sprayed workpieces with acetone; carrying out sand spraying and roughening process with 20 meshes of brown aluminium oxide; then adopting the supersonic flame spraying method to spray Cr3C2-25NiCr metal ceramic coating on the surface of a copper crystallizer, coating a layer of brazing filler metal with low melting point mixed with metal ceramics on the metal ceramic coating; finally carrying out remelting treatment in a vacuum furnace, preserving heat for 0.5-2 hours at the temperature of 600 DEG C to 700 DEG C, and cooling to the room temperature by blowing high-pressured nitrogen. The invention has the advantages of ensuring the bonding intensity between the metal ceramic coating and the substrate, lowering the porosity of the coating, and improving the cohesion strength of the coating; the invention further has the advantages of even and compact coating, flat surface, realization of metallurgical bonding with the substrate, good properties of high temperature abrasion resistance and corrosion resistance, and good cold fatigue and hot fatigue resistance properties; the coating can bear the high temperature abrasion of the casting blank surface and the casting blank has lower friction coefficient, thus being beneficial for improving the quality of the casting blank surface and improving the speed of jolleying.
Description
technical field [0001] The invention belongs to the technical field of continuous casting crystallizers, in particular to a method for manufacturing a copper plate of a cermet coating crystallizer. Background technique [0002] Mold is the core component in continuous casting production. On the current high-operating rate and high pouring speed continuous casting machine, high-temperature wear, thermal cracks, and thermal deformation have become the main reasons for the replacement of mold copper plates. In recent years, the use of electroplating to treat the surface of the mold has greatly improved the wear resistance and corrosion resistance of the mold, improved the quality and productivity of the slab, saved costs, and extended the service life of the mold, but at present There are certain deficiencies and defects in various coatings. Such as the coating is too thin, easy to fall off, poor wear resistance, corrosion resistance, complicated process, serious pollution, et...
Claims
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Patent Timeline
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Inventor 董现春许静张飞虎章军鞠建斌陈延清张熹
Owner SHOUGANG CORPORATION
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