Spray coating
Features of the Detonation Spray Coating Technology
* High density (<1% porosity)
* High bond strength (> 10000 PSI)
* Negligible degradation of the powder
* Smooth surface finish
* Moderate substrate heating (<150oC)
* Controlled residual compressive stress
* Enhanced fracture toughness
* Better wear resistance than plasma coating
* Simple in design
* Low capital and running cost
Advantages
* Low Substrate Temperature
* Low Cost of Operation
* Less Gases Consumption
* Less Water Consumption
* Less Electrical Energy Consumption
* Less Down Time
* Less Work Scrap
* No Expensive Proprietary Powder
Type of Powders Sprayed
* Metals , Oxides & Cermets, Carbides and Alloys
Substrate Materials
* Metals, Alloys, Superalloys, Dielectric substrates, Plastics, Glass and Ceramics (Any substrate having hardness < 65 HRC can be coated by DSC)
Applications
Aerospace-Turbine components like blades, seals, rotor shafts, Compressor blades; Marine Pump components-Rotors, thrust bearings, sleeves, valve stems, piston rods; Steel plants-Furnace tyres, rollers, guides, Oxygen sensors, journal bearings, cutters; Mining and earthmoving-Bucket teeth, Jaws, transport rollers, Mining drill bits; Electrical & electronics-Insulation rings, support plates, moulds, Hydel power-Nozzles, shafts, spheres, blades; Paper & pulp-printing gripper bars, gripper pads, rolls, guide plates, printing rolls, cutters.
Technical Capabilities
* Thickness rate : 5-25 micron/shot
* Thickness buildup
o Carbide & Cermets : 20-500 micron
o Ceramics : 50-1000 micron
o Metals & Alloys : upto few mm
* Powder consumption /hr
o Carbide based powders : 2.0 to 5.0 kg
o Oxide based powder : 0.5 to 2.0 kg
* Coating Coverage : 0.5 to 1.0 m2/hr
* Powder particle velocity : 500 to 1200 m/s
* Powder particle temperature : upto 3980 0C
* Powder deposition efficiency : 30 to 60 %
* Coating porosity : 0.1 to 1.0 %
* Bond strength : >75 Mpa
* Coating hardness : WC-Co : 1300 Hv, Cr3C2-NiCr : 1000 Hv
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