Fused Metal Temperature in Arc Spraying : Study on Arc Spraying (Report 3)

概要

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A flight process of fused metal in arc spraying is divided into four Stages, i.e., 1) fusion from wire, 2) flying in arc plasma, 3) flying in the air, and 4) adhesion on substrate. The fused metal temperature is estimated at two points of the flight process. One of them, (Tc), is estimated at the adhesion stage with a silicone oil calorimeter, and the other, (Ti), at the fusion stage by the calculation of heat input. The following results ore obtained from the estimations, (1) (Te) and (Ti) depend on a wire feed speed parameter v_+/(v_+ + v_-), and the (Tc) versus v_+/(v_+ + v_-) curves shows a similar shape to the (Ti) curve, where (v_+) is the positive electrode side and (v_-) the negative. (2) The temperature (Tc) at the adhesion stage is higher than the temperature (Ti) at the fusion stage for all the experimental values of v_+/( v_+ + v_-). (3) The heating effect of the fused metal in the arc plasma is thought to be greater than the cooling effect of the fused metal in the air. This accounts for the higher temperature attained at adhesion stage than the temperature at the fusion stage.
社団法人溶接学会の論文
1985-04-01