| 摘要 |
PURPOSE:To form a film having a low content of oxides and having low porosity on the surface of a base material while preventing the inclusion of oxygen and moisture when molten particles are sprayed by replacing the air in a vessel- shaped body to be sprayed by an inert gas. CONSTITUTION:An inert gas G is supplied into the internal space of the body 1 to be sprayed from a device for supplying an inert gas such as Ar and N2 through an injection pipe 15, a control valve 11, and an opening 13 to carry out thermal spraying. The air in the body 1 is simultaneously discharged to the outside through an opening 12, an exhaust valve 10, and an exhaust pipe 14. As a result, the air in the body 1 is replaced by the inert gas G, and the inside of the body 1 is filled with the inert gas G. The molten particles of metal, etc., are sprayed into such an atmosphere of the inert gas G from a thermal spraying gun 17 to cause electrical-molten-wire spraying, and a film having a low content of oxides and having extremely low porosity can be formed on the inner surface 22 of the body 1. |
