Patent ID: 7341763
Filing Date: 2008-03-11
Classification: C23C

Abstract:
1. A thermal spraying method comprising: a step of delivering a plurality of wire-shaped thermal spraying materials to maintain a positional relationship where tips of the thermal spraying materials are located mutually adjacent while the tips of the thermal spraying materials are consumed, a step of applying a voltage difference between the plurality of thermal spraying materials to generate an arc between the tips of the thermal spraying materials, a first step of blowing a droplet formed near the tips of the thermal spraying materials by the arc to lengthen the droplet into a lengthened droplet, and a second step of further blowing the lengthened droplet to atomize it into atomized droplets and to scatter the atomized droplets towards a face to be thermally sprayed, wherein the second step comprises an initial sub-step of atomizing a portion of the lengthened droplet into the atomized droplets by a low speed blow at a first position and a subsequent sub-step of atomizing a portion of the lengthened droplet not atomized in the initial sub-step into atomized droplets by a high speed blow at a second position, wherein the second position is located at a downstream side of the first position along the blowing direction of the first step.