Spray and Fuse Tungsten Carbide

Spray and fuse is a continuous brazing process that applies the coating and fuses it to the base material in a single process. This process does not melt the base material and consequently there is no dilution of the overlay alloy. The bond is created by the diffusion of atoms between the overlay alloy and base material resulting in a very dense, hard coating with high bond strength.

Features and Benefits

Low heat input reduces dissolution of WC/WC2 during application

Benefit: Allows the use of harder WC/WC2 carbides which provide better wear resistance than mono crystalline WC carbides. Provides better wear life in high impact conditions.

Low heat input results in a cooler weld puddle with less carbide sinking

Benefit: More even carbide distribution extends service life

Low heat input results in no dissolution of the base material

Benefit: No formation of brittle intermetallic phases greatly reduces cracking

Deposit rates up to 15lbs/hour (6.8kg/hour) and up to 0.25” (6mm) per pass

Benefit: Economical application of thick overlays

Low residual stress in the overlay allows for multiple passes without cracking and spalling

Benefit: Capable of applying thick overlays, up to 1” (25mm) for maximum service life.

Low residual stress makes the overlay very impact resistant

Benefit: Spray and fuse overlays are excellent in high impact applications such as Tee spools.

ASME recognized welding process

Benefit: Overlays can be applied to registered pressure equipment and piping.

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