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THERMAL Spraying

APS

Atmospheric
Plasma
Spraying 

EAWS

ELECTRIC
ARC
WIRE
SPRAY

HVOF

High
Velocity
Oxi
Fuel

APS – Atmospheric Plasma Spraying

thick coatings

The process basically relies on the introduction of the raw material in particulate form within the plasma jet , in order to accelerate them and fuse .

The process is based on the formation of plasmogen means , from the dissociation and ionization of the gas by a high-power electric arc (about 80KW ) between a cathode and an anode tubular . The gas flow rate generated is high, in the order of 1000 m / s , since the exit of the torch, the gas tending to return to its normal energy state ( lowest energy ) again forming an associated highly exothermic reaction .

aps coatings durit coatings
Aps - durit coatings - revestimentos técnicos

CERAMIC MATERIALS:

Al2O3; TiO2; Al2O3/TiO2; Cr2O3; Cr2O3/TiO2; Cr2O3/SiO; ZrO2/CaO; ZrO2/MgO; ZrO/YO/CeO; ZrO2/Y2O3.

•  Raw material Form : powder .

•  Typical flow of raw material : 2.5 to 3.5 kg / h.

•  Gas typical speed : 1,000 m / s .

•  Typical particle velocity : 200 m / s.

•  Power Source: plasma state .

•  Temperature of the power source 10 000-20 000 ° C.

•  Typical adhesion voltages : 20-50 MPa.

•  Typical porosity : 4 to 8 %.

•  Typical coating thickness : 200-1000 microns

OBJECTIVES

Adapt and improve surfaces for applications that will be submitted , providing characteristics:


• Resistance to wear (abrasion , erosion and friction) ;

• Resistance to corrosion and oxidation ;

• Conductivity or electrical insulation, thermal or magnetic ; optical ;

• Biocompatibility.

CUSTOMER BENEFITS

• Increased longevity of the components;

• Cost reduction ;

• Reduced downtime / maintenance ;

• Increased overall productivity ;

• Better product quality .

EAWS - Electric Arc Wire Spray

thick coatings

In this process, an electric arc is established which causes the fusion of two wires continuously fed . By means of a jet of high pressure air is projected molten metal onto the substrate .

With this process coatings are usually produced intrinsic porosity of about 3 %, and the levels of adhesion of 40 MPa . The typical thickness of the coatings produced with this technology is between 300 and 2.000μm .

eaws - Durit Coatings
eaws - Durit Coatings

MATERIALS AND METAL ALLOYS:

Mo99.9+, Cu5Al, Ni20Cr, AISI420, AISI316, Liga C-276, etc…

• Raw material : wire.

• Typical feedstock flow : 10 to 20 kg / h.

• Typical particle velocity of 100 m / s .

• Power source: electric arc.

• Temperature energy source : 5500 º C.

• Typical voltages accession : 15-40 MPa.

• 3% typical porosity.

• Thickness of layers : 200-5000 microns.

OBJECTIVES

Adapt and improve surfaces for applications that will be submitted , giving them characteristics:
• Resistance to wear (abrasion , erosion and friction);

• Resistance to corrosion and oxidation;

• Conductivity or electrical insulation, thermal or magnetic ; optics;

• Biocompatibility.

CUSTOMER BENEFITS

• Increased longevity of the components;

• Cost reduction;

• Reduced downtime / maintenance;

• Increased overall productivity;

• Better product quality.

HVOF - High Velocity Oxi-Fuel

thick coatings

The process is based on continuous oxygen combustion of a fuel. Combustion gases entering a chamber , where the raw material in powder form injected axially through the flow stream of an inert gas , usually nitrogen.
The high gas pressures associated with geometries designed specifically to promote the acceleration of the same , allowing the coating material get speeds of the order of 300 m / s with a gas velocity of 2140m / s.

This process is especially designed for the application of high quality anti-wear coating , which is characterized by high hardness (approximately 1.200HV ) , low porosity (0.5-1% ) and high adhesion to the substrate (> 80 MPa) . Typical thicknesses of these applications varies between 50 and 400μm .

hvof durit coatings

CERMETS

WC/Co; WC/Co-Cr; WC/Ni; WC/NiCr; WC/NiCrBSiFe; Cr2C3/NiCr.

• Raw material form: powder;

• Typical flow of raw material : 2.5 to 3.0 kg / h;

• Typical gas velocity : 2000 m/s;

• Typical particle velocity : 300 m/s;

• Power source: combustion of propane with oxygen or hydrogen;

• Temperature energy source : 3000 º C;

• Typical adhesion voltages > 80 MPa;

• Typical porosity : 0.5 to 1%;

• Typical thickness of coating : 100-500 micrometers.

OBJECTIVES

   Adapt and improve surfaces for applications that will be submitted , giving them characteristics:

•  Resistance to wear (abrasion , erosion and friction) ;

•  Resistance to corrosion and oxidation ;

•  Conductivity or electrical insulation, thermal or magnetic ; optics ;

•  Biocompatibility.

CUSTOMER BENEFITS

• Increased longevity of the components;

• Cost reduction ;

• Reduced downtime / maintenance ;

• Increased overall productivity ;

• Better product quality.