Metal Spray Welding Process

The molten powder wire or rod is accelerated and propelled towards the substrate by gas or an atomization jet.

Metal spray welding process.

All involve the use of a coating material in the form of a wire rod or powder which is melted by one of the following sources of energy. Welders use the spray transfer method for most mcaw procedures. The heat from this arc melts the incoming wire which is then entrained in an air jet from the gun. Arc spray sometimes referred to as twin wire arc spray is a process that uses an electric arc to melt wires.

Coating characteristics and evaluation. During the twin wire arc spray process twa two wires of conductive materials are charged with opposing polarity and are fed into an arc gun at the same speed. The molten metal is then atomised with compressed air to create a spray stream that applies the coating onto the surface being sprayed. Dry compressed air atomizes the molten material and forms the coating.

This article throws light upon the four main steps involved in the process of metal spraying. Wire arc spray is a form of thermal spraying where two consumable metal wires are fed independently into the spray gun. These wires are then charged and an arc is generated between them. Spray transfer uses high voltage and amperage to produce an arc that is on at all times.

Spray transfer is ideal for use on thicker metals for butt or fillet joints. Gas metal arc welding sometimes referred to by its subtypes metal inert gas welding or metal active gas welding is a welding process in which an electric arc forms between a consumable mig wire electrode and the workpiece metal which heats the workpiece metal causing them to melt and join. Make offer metal powder spray welding torch gun oxygen acetylene flame welder qh 2 h usa. Minute molten droplets of metal travel via the arc and on to the base metal or the joint being worked on.

Similar to globular transfer weld metal in the spray transfer method travels across an arc. A constant voltage d. Stoody jet spray welding torch kit model k hard facing 10lb powder 60tg 85tg. Spray arc welding is one of the processes used to transfer metal from the electrode or wire to the weld.

Selection of metallising processes 4. Along with the wire electrode a shielding gas feeds through the welding gun which shields the process from atmospheric contamination. The process can be semi automatic or automatic. Metal powder spray welding torch gun oxygen acetylene flame welder qh 2 h usa.

The tips of the wires meet melt and become molten. Metallising materials and their selection 3.