Relation between Adhesion Strength of Arc Sprayed Coating and Fused Metal Temperature : Study on Arc Spraying (Report 4)

概要

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Adhesion strength of sprayed coating, F, is related to fused metal temperature in arc spraying of aluminium and stainless steel. Fused metal temperatures are estimated at two stages in the flight process of fused metal. One of them, Te, is estimated at adhesion stage with a silicone oil calorimeter, and the other, Ti, at fusion stage by the calculation of heat input. Main results of the Study are summarized as follows; (1) F, Tc and Ti depend on the wire feed speed parameters v_+ /(v_+ + v_-) where v+ is positive electrode side and v_- is negative one. The graphs of F, Tc and Ti versus v_÷/( v_÷ + v_-) all exhibit a similar pattern. (2) F increases with an increasing Te and Ti. (3) The maximum F is obtained when heat input per unit wire deposition is maximum. (4) The arc spraying condition to obtain the maximum F is estimated by measurement of the heat input parameter [S.S.H.], where [S.S.H.] is calculated from v_+ , v_- and average are current.
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1985-10-01