Verfahren zur Entfernung von Unhebenheiten beim hin und her thermischen Spritzen

摘要

A method of eliminating unevenness in pass-reversal thermal spraying of a substrate surface (44) by: uniformly thermally spraying the substrate surface (44) by moving a wire fed arc spray (10) gun along the length (46) of the substrate surface (44) 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 (10) approaches an end zone (45) 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 (45) 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 (10) approaches other or repeated end zones of the substrate length (46) during repeated passes.