| 摘要 |
PURPOSE:To form heat resistant mixed thermal-spraying coated layer available in ultra high temp. and in an atmosphere with large temp. difference by symmetrically arranging plural powder charging holes to one thermal spraying gun and executing the thermal spraying. CONSTITUTION:In the case of executing the thermal spraying of (m) kinds (m>=2) of powders with one thermal spraying gun 1 at the same time, same kind of powder is jetted by supplying a same kind of powder through n Xpowder charging holes provided at the (n) symmetrical positions (n>=2), wherein the symmetrical axes are based on a cathode 2 as the center, and the thermal spraying is executed. For example, four charging holes are symmetrically set to the cathode (tungsten electrode) 2. Ceramic powder is charged from the faced charging holes Pa and Pc, and metal powder is charged from the charging holes Pb, Pd, and at the same time, the thermal spraying is executed. A uniformly mixed layer is obtd. over the whole zone of thermal spraying layer without developing disturbance of shape to the plasma jet. By this method, the ultra heat-resistant film for preventing the film from breakage and boundary detachment under ultrahigh temp. as well as large temp. difference atmosphere, can be formed. |
