▎ 摘　　要

NOVELTY - Preparation of synthesized carbide reinforced and toughened metal-based composite coating, involves (a) mixing and stirring the precursor of the ceramic (A) and the precursor of the material (B) in the de-ionized water, (b) adding expanded graphite in the mixed material in the step (a) for multiple times, ultrasonically dispersing for 3 hours, (c) filtering and drying the mixed solution in the step (b) to obtain the mixed powder, (d) ball milling the mixed powder and the reinforced material according to the proportion on the ball mill, maintaining mixed powder ratio of 1-40 wt.%, (e) subjecting the powder in the step (d) for vacuum mixing and drying, (f) mixing the powder in step (e) with the prepared gum Arabic solution, modulating into paste, uniformly coating on the surface of the base, (g) after coating, drying the coating layer at 150 degrees C for 2 hours, (h) pre-heating the coating layer, heating and melting to form a coating by laser high temperature. USE - Preparation of synthesized carbide reinforced and toughened metal-based composite coating by using expanded graphite as carbon source. ADVANTAGE - The method uses cheap expanded graphite to replace expensive graphene as carbon source, saves the factory cost, and improves the mechanical property. DETAILED DESCRIPTION - Preparation of synthesized carbide reinforced and toughened metal-based composite coating, involves (a) mixing and stirring the precursor of the ceramic (A) and the precursor of the material (B) in the de-ionized water according to the ratio of 1:3, (b) adding expanded graphite in the mixed material in the step (a) for multiple times, ultrasonically dispersing for 3 hours, (c) filtering and drying the mixed solution in the step (b) to obtain the mixed powder, (d) ball milling the mixed powder and the reinforced material according to the proportion on the ball mill, maintaining mixed powder ratio of 1-40 wt.%, (e) subjecting the powder in the step (d) for vacuum mixing and drying at 100 degrees C, (f) mixing the powder in step (e) with the prepared gum Arabic solution, modulating into paste, uniformly coating on the surface of the base, (g) after coating, drying the coating layer at 150 degrees C for 2 hours, (h) pre-heating the coating layer, heating and melting to form a coating by laser high temperature. The ceramic (A) in the step (a) is tungsten carbide, titanium carbide, chromium carbide, vanadium carbide or silicon carbide. The material (B) is tungsten, titanium, chromium, vanadium or silicon corresponding to the ceramic (A). the reinforcing matrix material in the step (d) is nickel-based alloy, aluminum-based alloy, titanium-based alloy or copper-based alloy.