Sanitary stainless steel valve welding process characteristics and spraying difference

Sanitary stainless steel valve welding process characteristics and spraying difference

Sanitary stainless steel valve welding process is the use of plasma arc as a heat source, and then by heating the substrate, so that the surface liquefaction, at the same time will be spray welding powder material into the plasma arc, powder in the arc column to get preheated, was melting or semi-molten state, by the flame jet to the molten pool, the full melting and discharge of gases and slag, the spray gun removed after the alloy molten pool solidification, the formation of the spray welding layer of the process.

Sanitary stainless steel valve spray welding technology, the main features are as follows.

(1) high productivity, good process stability: because sanitary stainless steel valves plasma spray welding temperature is high, the heat transfer rate is large, so the spray welding speed is fast, the productivity is also high, and can be smooth spray welding of refractory materials.

(2) spray welding layer composition, organization uniformity spray welding layer is flat and smooth, the size can be controlled more accurately, can be obtained in 0. 125 ~ 8mm between any thickness of the spray welding layer.

Sanitary stainless steel valves using plasma arc spray welding and sanitary valves plasma spray coating difference:

1, when spraying, sanitary stainless steel valve plasma arc is established inside the spray gun, between the tungsten cathode and copper anode nozzle, the workpiece is not charged, known as non-transfer arc. Sanitary stainless steel valve plasma spray welding is used in the joint arc of non-transfer arc and transfer arc.

2, sanitary stainless steel valve spray welding and spraying equipment used is basically similar, but with a single power supply at the same time supply non-transfer arc and transfer arc is not very stable, so usually use two power supply to the non-transfer arc and transfer arc power supply.