The invention discloses a method for gradient and length-
diameter ratio CNTs reinforced
copper-based composite materials of
laser-induction composite melting deposition. The method for the gradient and length-
diameter ratio CNTs reinforced
copper-based composite materials of the
laser-induction composite melting deposition is characterized by comprising a first step of adopting a method of rotating
electrophoresis to carry out screening on carbon nano tubes, a second step of respectively and evenly mixing the screened and obtained carbon nano tubes with
copper alloy powder on a ball
grinding mill according to a length-
diameter ratio in a gradient-increase mode, and a third step of adopting the method of
laser-induction composite melting deposition to prepare the CNTs reinforced
copper matrix composite materials of the length-
diameter ratio. The method for the gradient and length-
diameter ratio CNTs reinforced copper-based composite materials of the laser-induction composite melting deposition has the advantages that the carbon nano tubes are screened and obtained through a method of rotating the
electrophoresis, chemical
nickel plating
processing is carried out on
copper matrix composite
powder distributed of the CNTs in a disperse mode, high temperature
oxygen of the
copper matrix composite
powder and
wetting performance of the CNTs and a
copper alloy are improved, gradient distribution of the CNTs which are different in length-
diameter ratio in the copper matrix composite materials is achieved, valuable materials are notably saved, manufacturing cost is reduced, and a manufacturing cycle is shortened.