Laser cladding tungsten carbide ceramic particle reinforced metal-based coating and its processing method

Abstract

The invention discloses a metal-based coating reinforced by laser cladding tungsten carbide ceramic particles, which includes alloy powder, the alloy powder includes tungsten powder and graphite with a molar ratio of 2:1, and the alloy powder also includes reduced iron powder and chromium powder , nickel powder, boron powder, silicon powder and copper powder; the composition and percentage mass ratio of further preferred alloy powder are respectively: tungsten powder 55-60%, graphite 7-9%, reduced iron powder 23-30%, chromium 0-3% nickel powder, 2-6% nickel powder, 0.3-1% boron powder, and 0.4-1% silicon powder; the invention also discloses a processing method for laser cladding tungsten carbide ceramic particle reinforced metal-based coating, the invention The tungsten carbide particle reinforcement phase was successfully prepared by laser cladding in-situ synthesis technology to strengthen the iron-based composite material. There is a transition layer between the coating and the substrate, indicating that they are atomically bonded and have a high bonding strength.

Description

technical field [0001] The invention belongs to the technical field of preparing alloy coatings by laser cladding, in particular to a cladding coating for preparing a tungsten carbide particle reinforcement phase through a laser cladding in-situ autogenous method and a processing method thereof. Background technique [0002] Tungsten carbide (WC) is a black hexagonal crystal, and the carbon is located in the gap of the tungsten lattice, forming a solid solution in the gap, which has a series of advantages such as wear resistance, heat resistance, corrosion resistance and good wettability with the base material. Since Moissan, a Frenchman, discovered tungsten carbide (WC) at the end of the 19th century, tungsten carbide (WC) has been widely used as a reinforcing phase of materials in the field of wear-resistant materials such as mining, tooling, and road renewing tools. [0003] In recent years, in the field of surface modification and repair and remanufacturing of damaged pa...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a laser cladding tungsten carbide ceramic particle reinforced metal-based coating, the reinforcement phase and the matrix are atomically bonded interface structures, which are diffusely distributed, and the interface is straight and free of The precipitated phase has good wettability with the matrix, which solves the problem of poor bonding between the reinforcing phase and the matrix in the prior art

Images