Method of eliminating unevenness in pass-reversal terminal...

Details Method of eliminating unevenness in pass-reversal terminal... Method of eliminating unevenness in pass-reversal terminal...

C - Chemistry, Metallurgy

23

C

C23C 4/12 (2006.01)

Patent

CA 2266863

A method of eliminating unevenness in pass-reversal thermal spraying of a substrate surface by: uniformly thermally spraying a substrate surface by moving a wire fed arc spray gun along the length of the substrate surface at constant spray parameters while using a first wire feed rate and a first current level for the gun's power supply; (b) when said spray gun approaches an end zone of the pass length requiring reversal of spray gun movement, reducing the wire feed rate and current by up to about 25% until the spray gun has completed such reversal and has exited from said end zone in the opposite direction; (c) while still continuing thermal spraying, restoring the wire feed rage and current to said first levels; and (d) repeating steps (b) and (c) as the spray gun approaches other or repeated end zones of the substrate length during repeated passes.

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