Capabilities

 

High Velocity Oxygen Fuel (HVOF):

 
Diamond Jet System uses high kinetic energy to produce dense coatings with no discernible porosity. Our coatings exhibit extremely dense and fine as-sprayed surface finishes in addition to high bond strengths.
The H.V.O.F process uses an oxygen fuel mixture to melt the selected carbide and powder alloys which are then accelerated to almost 2 times the speed of sound. The high velocity particles flatten upon impact with the substrate to form a dense, tightly bonded coating.
Typical coatings exhibit tensile bond strengths exceeding 12,000 psi. Coatings show a fine surface texture with no porosity or free space.
 

Plasma Arc Transfer (PTA):

 
The PTA hardfacing process allows the deposition of most of the noble materials available in alloy or composite powder forms. The operating principle lies in a permanent tungsten electrode (cathode) and a copper nozzle (anode) between which a pilot arc is first established through a plasma gas being ionized. A second power source then transfers the plasma column toward the substrate to be welded. The powders fall into this transferred plasma, with the help of a carrier gas, while the molten pool is protected by a much more considerable flow of inert shield gas.
 

Advantages of PTA


• Ease of automation because of the inherent arc stability and precision of the process, reliable and reproducible parameters.

• Absolute control of the heat-affected zone, minimal base dilution of 3-5% (compared to 30 to 40% with conventional methods) minimizing dilution of the coating to the base metal. Low heat input reduces part deformation, and dissolution of any hard phases.

• Ideal for precision components, competitive and more versatile alternative to the laser cladding and spray-and-fuse processes.

• Ideal for specialty wear plates, allows a higher deposition rate while maintaining the heat input below the common practice average.
 

THERMAL ARC METALIZE (TAM):

 
Not to be confused with spray welding, Thermal Arc Metalizing (T.A.M) represents the most current technology providing results unattainable with older and outdated equipment.
Pre-alloyed wires are introduced to an electric arc, melted and propelled by processed air to impact a prepared surface. The high velocity at impact produces a build with exceptional density; bond strengths in excess of 10,000 psi. Tensile and hardness from 40 to 60 HRC are readily achievable.
 

SPRAY FUSE:

 
This process is an art form where extremely hard and dense coatings are sprayed onto a pre-heated surface.
The coating is then fused at 1980 ºF (1080ºC) to produce a metallurgical bond to the substrate.
Fusing also eliminates all porosity, which in turn provides an excellent wearing surface under the most severe conditions.