(1) ready to spray the front surface strict purification treatment, roughening treatment according to process requirements to do, prepared surface moisture and avoid contact or touch.(tantalum carbide )

(2) spraying strictly regulate, control the workpiece temperature rise should not exceed 250 ℃, when the coating is thick, the workpiece is small, continuous spray temperature may exceed 250 ℃, intermittent spraying method should be used to cool, but not the residence time too long, otherwise the coating will be pollution poor bonding between the layers.

(3) Good excessive grinding angle and edges, holes or keyways journal, should be good hole plugging and polished into a rounded edge keyway, pay attention to spray the edges.

(4) the outer surface of the substrate preheating temperature shall be taken as the lower limit, the spraying process should be controlled substrate temperature, thereby reducing the force of contraction of the substrate.

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