Australian Metal Powders Supplies (AMPS)

Thermal Spray Powders

AMPS represents two companies in Thermal Spray Powders which we believe complement each other.

Hoganas products a full range of nickel-iron and cobalt –based atomised powders. These grades are developed for the specific needs of a given thermal surfacing equipment and application.

H.C. Starck has the Amperit range which are thermal spray powders containing carbides are used to create wear-resistant coatings. The carbidic hard phase embedded in a ductile metal matrix gives layers a tremendous amount of hardness and excellent wear resistance. Thermal spray powders are well-suited for any product subjected to abrasion, erosion and wear. More information on these thermal spray powders can be found on the HC Stark website.

The surfacing techniques that the powder serve include:

PTA
PTA (Plasma Transferred Arc) welding

PTA (Plasma Transferred Arc) welding is a process which can be highly automated. It utilises a combined arc/plasma stream to form a limited melt on the work piece surface. A low base metal dilution with a small heat affected zone and a dense uniform coating is achieved.

A wide range of user-specific consumables are possible. This process has found extensive use in high-volume automated applications such as the thermal surfacing of exhaust valves. Deposition rates up to 12 kg/ hour are possible, with surfacing thickness from 1– 6 mm.

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PTA cladding grades

The following powders are normally carried in stock. There are other powders in the range, which are available on request.

PTA grades table
Laser cladding
Laser cladding

Focuses and controls heat and weld depth, offering a clean metallic bond with minimal dilution, a small heat affected zone and fine grain structure. Deposition rates are up to 8.0 kg/hour, and surfacing thickness from 0.5 to more than 4 mm. Click here for more information.

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Laser cladding grades

The following powders are normally carried in stock. There are other powders in the range, which are available on request.

Laser grades table
Plasma and HVOF
Plasma and HVOF

Plasma spraying employs a technique essentially similar to flame spraying. It differs in that the flame comprises an electrically excited plasma of high velocity and temperature (≈15,000°K), permitting a denser coating (95-98%). Deposition rates are from 2–8 kg/hour, and surfacing thickness ranges from 0.1–2.5 mm.

HVOF (High-Velocity Oxy-Fuel) spraying combines velocities up to 700 m/s with moderate temperatures. This process provides a very dense coating (> 97%). Deposition rates are up to 9 kg/hour, and surfacing thickness from 0.05–2.5 mm.

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HVOF and plasma spraying grades

The following powders are normally carried in stock. There are other powders in the range, which are available on request.

HVOF plasma grades table
Flame spraying
Flame spraying

Occurs where powder is fed into a fixed oxy-acetylene or oxy-hydrogen flame, and projected towards the base material. The semi-molten material forms a mechanical bond which, when fused to the work piece, creates a metallurgical bond. Flame spraying is ideal for coating cylindrical parts. High-hardness alloys and tungsten carbide mixtures can be used to best advantage. Deposition rates are from 1–9 kg/hour, and surfacing thickness ranges from 0.1–3mm.

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Flame spraying grades

The following powders are normally carried in stock. There are other powders in the range, which are available on request.

Flame spraying grades table
Powder welding
Powder welding

Employs an oxy-acetylene torch, with the powder fed into the flame from an attached hopper. Typically used for glass moulds, smaller parts and repairs. Particularly suitable for the repair of cast iron and machined parts. Powder welding gives a smooth, dense coating with diffusion bond to the base material. Deposition rates are from 0.5–2.5 kg/hour, and surfacing thickness from 0.2–12 mm.

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Powder welding grades - Nickel base

The following powders are normally carried in stock. There are other powders in the range, which are available on request.

Powder welding grades - Nickel based