Metal Spray Welding Process

This article throws light upon the four main steps involved in the process of metal spraying.

Metal spray welding process.

Similar to globular transfer weld metal in the spray transfer method travels across an arc. Spray transfer uses high voltage and amperage to produce an arc that is on at all times. The droplets in this technique are minute and resemble that of water spouting out of a hose. Spray arc welding is one of the processes used to transfer metal from the electrode or wire to the weld.

The tips of the wires meet melt and become molten. Wire arc spray is a form of thermal spraying where two consumable metal wires are fed independently into the spray gun. Minute molten droplets of metal travel via the arc and on to the base metal or the joint being worked on. Selection of metallising processes 4.

Coating characteristics and evaluation. 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. The heat from this arc melts the incoming wire which is then entrained in an air jet from the gun.

Make offer metal powder spray welding torch gun oxygen acetylene flame welder qh 2 h usa. Metal powder spray welding torch gun oxygen acetylene flame welder qh 2 h usa. Stoody jet spray welding torch kit model k hard facing 10lb powder 60tg 85tg. 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. The molten powder wire or rod is accelerated and propelled towards the substrate by gas or an atomization jet. Welders use the spray transfer method for most mcaw procedures. Arc spray sometimes referred to as twin wire arc spray is a process that uses an electric arc to melt wires.

These wires are then charged and an arc is generated between them. 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. Why apply arc spray coatings.

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. Metallising materials and their selection 3.