Cobalt Alloy Coating

Cobalt Alloy Coating refers to specialized surface layers, often thin and durable, applied to components via thermal spray (HVOF) or hardfacing welding methods. These coatings, based on cobalt superalloys like Stellite, transfer the alloy's superior surface properties—specifically exceptional resistance to wear, galling, and high-temperature oxidation—to the substrate component. They maintain high hardness and corrosion resistance even when subjected to intense heat and abrasive media. Cobalt Alloy Coatings are vital for protecting critical parts in gas turbine blades, industrial valves, bearing surfaces, and industrial mixer components operating in extreme heat and abrasive environments. Zeron Fastners specializes in providing precursor materials and finished components with high-integrity Cobalt Alloy Coatings.

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Cobalt Alloy Coating

Cobalt Alloy Coating Chemical Composition (Typical High-Temp Cobalt Alloy)

Element Content (%)
Cobalt (Co) Balance
Chromium (Cr) 20.0 – 30.0
Nickel (Ni) 10.0 – 20.0
Tungsten (W) 8.0 – 15.0
Iron (Fe) 3.0 max
Carbon (C) 0.10 max
Manganese (Mn) 1.0 max
Silicon (Si) 1.0 max

Cobalt Alloy Coating Mechanical Properties (Typical Hardfaced Layer)

Property Value (Typical)
Hardness (Rockwell C) 35 – 55 HRC
Wear Resistance Excellent
Oxidation Resistance (High Temp) Very Good
Corrosion Resistance Good in most media

Cobalt Alloy Coating Feature Products