Composite gradient coating for repairing surface of vane and preparation method thereof
A technology of surface repair and gradient coating, applied in coatings, chemical instruments and methods, metal material coating processes, etc., can solve the problems of production efficiency, unacceptable cost analysis enterprises, etc., and achieve uniform coating and matrix structure, The effect of improving the bonding strength and improving the corrosion resistance
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[0030] The preparation method of the composite gradient coating of blade surface restoration of the present invention comprises the following steps:
[0031] 1) Clean, degrease and derust the surface of the blade to be repaired;
[0032] 2) Add a binder to NiCrBSi nickel-based self-fusion metal powder, and stir to form a bottom slurry; then apply the bottom slurry on the concave surface of the blade surface to be repaired, fill up the pit, and form a thickness of 100 ~150μm bottom layer slurry coating, followed by drying in an oven at 80~160°C for 1~3h, then air cooling and repairing, and the bottom layer is obtained on the surface of the blade to be repaired; among them, the quality of the adhesive in the bottom layer slurry Fractions are 3% to 10%; binders include polyvinyl butyral, polymethyl methacrylate or turpentine;
[0033] 3) Add a binder to the NiCrMoRE nickel-based composite metal powder, and stir to form a surface layer slurry; then apply the surface layer slurry ...
Embodiment 1
[0039] The composite gradient coating for repairing the surface of the blade in this embodiment is based on the blade to be repaired, including the bottom layer and the surface layer processed by vacuum brazing; the bottom layer is formed on the surface of the blade to be repaired, and the surface layer is formed on the surface of the bottom layer;
[0040] Wherein, the material of the bottom layer includes NiCrBSi nickel-based self-fluxing metal powder with a particle size of 150-300 mesh; by weight percentage, it includes 70% Ni, 15% Cr, 1% C, 4.0% B, 5.0% Si, 5% Fe, the total weight percentage is 100%.
[0041] The material of the surface layer includes NiCrMoRE nickel-based composite metal powder with a particle size of 150-300 mesh; by weight percentage, it includes 65% Ni, 15% Cr, 3.0% Cu, 3.0% Mo, 1.0% Nb, 0.5% % C, 3.5% B, 4.5% Si, 4% Fe, 0.5% Ce, the total weight percentage is 100%.
[0042] The preparation method of the composite gradient coating for blade surface r...
Embodiment 2
[0049] The composite gradient coating for blade surface repair in this embodiment is based on the blade to be repaired, including the bottom layer and the surface layer treated by vacuum cladding; the bottom layer is formed on the surface of the blade to be repaired, and the surface layer is formed on the surface of the bottom layer;
[0050] Wherein, the material of the bottom layer includes NiCrBSi nickel-based self-fluxing metal powder with a particle size of 150-300 mesh; in terms of weight percentage, it includes 68% Ni, 17% Cr, 1.1% C, 3.9% B, 5.0% Si, 5% Fe, the total weight percentage is 100%.
[0051] The material of the surface layer includes NiCrMoRE nickel-based composite metal powder with a particle size of 150-300 mesh; by weight percentage, it includes 61% Ni, 18.5% Cr, 3.0% Cu, 3.0% Mo, 1.0% Nb, 0.5% % C, 3% B, 4.5% Si, 5% Fe, 0.5% Ce, the total weight percentage is 100%.
[0052] The preparation method of the composite gradient coating for blade surface repai...
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Abstract
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