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Vecalloy Cr-Free produces a hard wear resistant coating and is very environmentally friendly. Vecalloy Cr-Free is an excellent re-placement for many twin wire arc spray materials because:
Wear and corrosion performance is not compromised with respect to Cr-bearing alloys
Coating integrity and spray is increased through mitigation of dust generation during spray. Vecalloy Cr-Free is a unique product in that it is the only wear resistant twin wire arc spray product which does not heavily rely on Chromium.
DESIGN APPROACH
The design process for Vecalloy Cr-Free involves a proprietary high throughput computational metallurgical process to evaluate millions of candidate alloy compositions. Potential candidates are evaluated using advanced screening processes where both properties and microstructure are measured.
This innovative process allows us to rapidly design the final material with impeccable accuracy—a much more advanced approach than conventional experiment-based methodologies.
R
Product Overview
Vecalloy Cr-Free is well suited as a replacement for Cr-bearing hardfacing products in a variety of applications. The significant
reduction in dust production allow for consistent high coating quality over a wide application window. The benefit of environ-
mental friendliness does not come at the cost of performance, Vecalloy Cr-Free is suitable for use in any application where hard-
facing products are employed including nanocrystalline and amorphous coatings.
VECALLOY CR-FREE CHEMISTRY AND PERFORMANCE Material Chemistry (wt%)
Properties
ASTM G65B: 0.37 grams lost (dry sand abrasion)
ASTM G77: 0.07 mm3 lost (metal to metal sliding wear)
Vickers Hardness: ~700 (= 60 HRC)
Adhesion Strength: 8,000 psi
Maximum Thickness: Unlimited
Deposition Efficiency: >70%
Fe Mo Si Other
BAL <20 <20 <10
10073 Commerce Park Drive. Cincinnati, OH 45246 / Phone: 513-847-3586 / Fax: 513-847-2880
E-Mail: [email protected]
Vecalloy
Technical Datasheet
Cr-Free Cr-Free Cr-Free
Vecalloy Cr Free at
440X
Vecalloy R
Technical Datasheet
Cr-Free
Alloy Vecalloy Cr-Free PMET 270
Metal to earth abrasion re-
sistance (ASTM G65B) 0.37 grams lost 0.37 grams lost
Metal to metal sliding wear re- 0.7 mm3 lost 0.7 mm3 lost
Adhesion Strength 8,000 psi 8,000 psi
Microhardness 700 HRC 900 HRC
Expected Finish 70 Ra 140 Ra
10073 Commerce Park Drive. Cincinnati, OH 45246 / Phone: 513-847-3586 / Fax: 513-847-2880
E-Mail: [email protected]
MAINTAINING OR EXCEEDING PERFORMANCE OF CR-BEARING ALLOYS
Vecalloy Cr-Free was compared in side by side trials with standard Cr bearing Fe-based hardfacing alloys such as PMET 270. The
conclusion is that no performance was sacrificed in order to achieve environmental friendliness. The results of these trials are
shown in the table below. Wear resistance is a combination of both particle hardness and general integrity of the coating itself.
The low dust production of Vecalloy Cr-Free produces a consistent high quality coating which equates to increased performance.
The low dust production also brings about the superior finish which can be achieved in Vecalloy Cr-Free through the reduction of
porosity and oxides.
WIDE APPLICATION WINDOW
Vecalloy Cr-Free is designed and tested to ensure a wide application window. A wide application window means that the coating
quality and performance are maintained over the range of conditions in which the material might be sprayed. As shown in the
chart below, Vecalloy Cr-Free maintains a high adhesion over the range of spray angles which might be experienced in the field
Atomizing Air Pressure 85 psi
Nozzle Cap Green
Nozzle Positioner Short Cross
Arc Load, Voltage 29-32
Current, Amvps 175-250
Standoff, Inches 6”
Coating Thickness per Pass
(1/1000th inch)
2-3
Spray Rate (lbs/hour) 25
Spray Rate (lbs/hr/100 amps) 10
Coverage 0.8 oz/ft2/0.001”
Expected Hardness (Vickers( 700 average
Expected ASTM G65B mass loss 0.37 g
VECALLOY CR-FREE 1/16” TWAS SPRAY PARAMETERS (Using TAFA 8830/8835)*
Parameters available upon request for other TWAS, HVAS, or HVCC systems.
* These parameters are a starting point. Always observe industry standard safety procedures and equipment with approved eye,
ear, and respiratory protection in place. Read and understand the MSDS. Do not operate equipment in a manner not approved by
manufacturer.
10073 Commerce Park Drive. Cincinnati, OH 45246 / Phone: 513-847-3586 / Fax: 513-847-2880
E-Mail: [email protected]
Vecalloy
Technical Datasheet
Cr-Free Cr-Free
