Patent ID: 6808755
Filing Date: 2004-10-26
Classification: C23C,Y02T

Abstract:
A thermal spraying method for producing a thermal sprayed layer by heating material for thermal spraying, by flying the heated material or the heating material to a surface of an object, and by piling the heated material on the surface of the object, comprising the steps of:preparing a speed-increasing means for adding energy to the heated material or the heating material to increase a flying speed of the material; and adding energy to the heated material or the heating material by the speed-increasing means in such a manner that a flying speed of the heated material or the heating material increases until the material reaches the surface of the object; wherein: the heating of the material is carried out by a first energy source capable of heating the material for thermal spraying, and the adding of the energy for increasing the flying speed of the material is carried out by a second energy source constituting the speed-increasing means for adding energy to the heated material or the heating material, the second energy source being controlled independently of the first energy source, the first energy source for heating the material is constituted by an induction heating apparatus for heating the material for thermal spraying by means of induction heating based on alternating current having a high frequency, and the speed-increasing means increases and accelerates the fixing speed of material by a gas stream having a high speed, and the gas stream is formed of at least one selected from the group consisting of helium gas, nitrogen gas, air gas, oxygen gas, and hydrogen gas; wherein the speed-increasing means includes; a gun having a high pressure room; a gas-storing division for storing gas; a compressor connected with the gas-storing division for compressing the gas supplied from the gas-storing division; and a pressure amplifier connected with the compressor for amplifying the pressure of the gas compressed by the compressor, and wherein the amplified pressure is supplied to the high pressure room for obtaining the high pressure in the high pressure room to increase, the flying speed of the material.