1985 Volume 3 Issue 1 Pages 21-26
Adhesion strength of sprayed coating, F, is related to fused metal temperature in arc spraying of aluminium and stainless steel. Fused metal tempreatures are estimated at tow stages on the flight process of fused metal. One of them, Tc, 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 follow;
(1) F, Tc and Ti depend on the wire feed speed parameters ν+/(ν++ν-) where ν+ is positive electrode side and ν- is negative. The graphs of F, Tc and Ti versus ν+/(ν++ν-) all exhibit a similar pattern.
(2) F increases with increasing Tc 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 ν+, ν- and average arc current.