Air cap for nozzle of high velocity oxy-fuel flame spraying burner, has chamber narrowed by air cap body, where region of body facing chamber is made of material that is thermally resilient than aluminum and have specific melting point

摘要

The cap (100) has an air cap chamber (20) narrowed by an air cap body (10), where a flame jet (50) produced by high velocity oxy-fuel flame spraying is conducted via the chamber. A region (12) of the body facing the chamber is made of a material e.g. brass, copper, or copper-brass alloy, that is thermally resilient than aluminum and have a melting point over 660 degrees Celsius. An inlet (30) supplies a spraying material (40) into the chamber, where a region of the body that is in contact with the spraying material is made of a wear-resistant material e.g. hard metal or silicon carbide. An independent claim is also included for a nozzle with a supplying device for supplying gases in an air cap chamber.