Device and method for fabricating ceramic reinforced composite coating based on plasma remelting and injection

A device for fabricating a ceramic reinforced composite coating based on plasma remelting and injection, comprising:

• a plasma cladding assembly, a powder feeding assembly, a worktable (1), a metal-based substrate (2) arranged on the worktable (1), and a thermal infrared imager,
• wherein the plasma cladding assembly comprises a plasma gun (6) and a plasma generator (7), wherein the plasma gun (6) is arranged above the metal-based substrate (2) and is connected to the plasma generator (7), and the plasma generator (7) is configured to generate a plasma arc beam (5), and the plasma arc beam (5) is used to heat the metal-based substrate (2) and form a molten pool (4) on a surface of the metal-based substrate (2),
• wherein the powder feeding assembly comprises a powder feeding copper tube (13), a powder feeder (16) and an adjustable connecting assembly, wherein the powder feeding copper tube (13) is connected to the plasma gun (6) via the adjustable connecting assembly, the powder feeder (16) is connected to the powder feeding copper tube (13) and is configured to feed ceramic particles to the molten pool (4) through the powder feeding copper tube (13),
• wherein the thermal infrared imager is configured to acquire an infrared image of the molten pool (4) and acquire an optimal injection position of the ceramic particles according to the infrared image, wherein the optimal injection position is a midpoint between a trailing edge of the plasma arc beam (5) emitted on the metal-based substrate (2) and a trailing edge of the molten pool (4),
• wherein the adjustable connecting assembly comprises a horizontal direction-adjustable connecting piece (8), a vertical direction-adjustable connecting piece (9) and an angle-adjustable connecting piece (12),
• wherein an end of the horizontal direction-adjustable connecting piece (8) is connected to the plasma gun (6), and a horizontal groove is provided at the other end of the horizontal direction-adjustable connecting piece (8),
• wherein the vertical direction-adjustable connecting piece (9) is provided with a vertical groove, the horizontal groove of the horizontal direction-adjustable connecting piece (8) and the vertical groove of the vertical direction-adjustable connecting piece (9) are connected by a bolt (10), and an end of the vertical direction-adjustable connecting piece (9) is provided with a threaded hole,
• wherein the angle-adjustable connecting piece (12) is connected to the vertical direction-adjustable connecting piece (9) by fitting a threaded nail (11) into the threaded hole, and is connected to the powder feeding copper tube (13), and
• wherein the horizontal direction-adjustable connecting piece (8) is connected to the plasma gun (6) via a stainless steel hose clamp, and/or the angle-adjustable connecting piece (12) is connected to the powder feeding copper tube (13) via a stainless steel hose clamp.