| 摘要 |
PROBLEM TO BE SOLVED: To shorten thermal spraying time and to improve the yield of thermal spraying material and the adhesion of a sprayed coating by performing thermal spraying while applying electrostatic field or electromagnetic field to a thermal spraying material. SOLUTION: By applying electrostatic field or electromagnetic field to the thermal spraying material which is projected from a thermal spray gun and comes flying, a Lorentz's force is generated and the thermal spraying material is accelerated in the direction of projection and also the directivity to the direction of projection is made correct. Accordingly, the broadening of the thermal spraying material during projection and flying between the tip of the gun and the object to be sprayed can be reduced and projection onto the part to be sprayed can be performed with high precision. Further, the time necessary to obtain a sprayed coating of prescribed thickness can be shortened because the velocity of projection is accelerated and final velocity is increased. Moreover, because of high velocity of projection, the colliding force of the thermal spraying material against the object to be sprayed is increased and, as a result, the occurrence of pores in the sprayed coating is reduced and the adhesion of the coating is improved. It is preferable to regulate the electrostatic field to be applied to 10-300KV and also the electromagnetic field to (10 to 1000)KA/m. |
