Metallized Ultra-Hard

A&A Coatings material is made exclusively for electric arc spraying. This material produces a hard, abrasive and corrosion resistant coating and has the unique property of increasing hardness in service. A service environment of up to 1700°F is possible. Conventional grinding and lapping techniques provide high chrome like finishes.

Ultra-Hard wire is used primarily as a hard corrosion resistant interface. When applied 0.010 inches thick, the material exhibits impressive elasticity for a coating this hard.. After application, the coating can be ground using aluminum oxide and subsequently polished to under a 10 RMS surface finish. This, coupled with good bond strength, high deposit efficiency, low coefficient of friction, high deposition rates, and ease of application, allows Ultra-Hard coatings to compete with processes that require plating or plasma technologies. This material also offers the added advantage of increasing coating hardness to as high as 1180 DPH (Vickers) after abrasive load is applied.

Material Wire Characteristics

Typical Composition: Silicon 1.6%
Chromium 29%
Manganese 1.65%
Boron 3.75
Iron Balance
Melting Point: 2200°F Approx

Physical Properties of Coating

Surface Finish: Ground Excellent
Density (g/cc): 6.7
Coating Weight (lb/ft2/.001″): .0625
Coating Bond Strength (PSI): 5,775

Finishing

A&A Company electric arc sprayed Ultra-Hard coatings are usually finished by grinding with an aluminum oxide wheel. Subsequent polishing can produce a surface finish approaching 10 microinches (RMS).

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