| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an HVAF (High Velocity Air-Fuel) thermal spraying apparatus capable of executing thermal spraying while suppressing the cost to be relatively low, suppressing any oxidation of metal or any deterioration of metal oxides, and forming a dense thermal-sprayed coating film having excellent adhesiveness to a base material. <P>SOLUTION: When metal, ceramic or resin is fed to a powder feed passage together with inert gas and compressed air, they are discharged substantially on the center axis of a flow passage of combustion gas passing through a Laval nozzle. Since the metal, ceramic or resin passes the barrel at a relatively low temperature supersonically, oxidation or deterioration is suppressed, and a dense thermal-sprayed coating film is formed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
