For different workpiece material, coating selection, coating quality control and process key points act as a “start a discussion” role.

First, the process selection

1, to understand the performance of the work itself: such material, composition, surface condition, wear parts and wear area and depth.

2, to understand the work conditions of use: environment (temperature, concentration of major media and other ingredients), the forces (impact load or sliding fit, interference fit), Failure (process tolerance, wear, corrosion, etc.).

3, the following conditions spraying should be used:

1) surface by static load or low-load sliding, but wear requirements for the coating and substrate binding tensile strength requirement of not more than 50N / mm2 workpiece, spray layer hardness HV130-350, coating thickness from 0.3 to a few millimeters, spraying state surface roughness Ra10-25μm, coating the surface roughness after grinding up Ra0.8-0.4μm, such as a variety of shaft bearing portion.

2) requires resistance to cavitation, erosion and after processing the surface roughness of not more than Ra0.4μm, such as imported cars crankshaft, crank train, marine crankshaft.

3) made of a copper alloy, aluminum or aluminum and other nonferrous metals, the need to restore or increase the size of the surface abrasion resistance.

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