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Spray and spray process distinction

Author: langfeng Time: 2017-11-17

Spray and spray process distinction

① spray coating and spray coating layer and the combination of the formation of the base metal is different, nickel-coated aluminum flame spray through the radiation heating chemical reaction occurs in the sandblasting rust Sa3, RZ> 50μm carbon steel surface micro-metallurgical Combination of the bottom and the working layer and the resulting "anchor hook" effect of the mechanical bonding coating, and spray bonding layer and the substrate is purely metallurgical bonding coating.
② different spray materials, spray welding requires the use of self-fluxing alloy powder, while the spray is less demanding on the self-fluxing powder, and not necessarily self-fluxing alloy powder, a variety of self-fluxing alloy powder can be used for spray welding Can be used for spraying, but the spray powder does not have self-flux can only be used for spraying and can not be used for spray welding process.
③ different parts of the workpiece heating, spraying and spray welding process, preheating spray temperature is different, the impact of different parts of the workpiece after spraying the workpiece structure, the performance is also different.
④ different density of the coating, spray coating dense, and spray layer of a small amount of porosity.
⑤ bear the load capacity is different, the spray coating generally can withstand large area contact, and more in the lubrication of the working surface, the mating surface and other less stress conditions to use, spray coating but can withstand greater impact Force, squeeze stress or contact stress.
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