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

Abstract

The invention discloses a laser-cladding tungsten carbide ceramic particle reinforced metal-based coating. The coating comprises alloy powder; the alloy powder comprises tungsten powder and graphite with the mole ratio of 2:1 and further comprises reduced iron powder, chromium powder, nickel powder, boron powder, silicon powder and copper powder; further, the alloy powder preferentially comprises the following components in percentage by mass: 55-60% of tungsten powder, 7-9% of graphite, 23-30% of reduced iron powder, 0-3% of chromium powder, 2-6% of nickel powder, 0.3-1% of boron powder and 0.4-1% of silicon powder. The invention further discloses a processing method for the laser-cladding tungsten carbide ceramic particle reinforced metal-based coating. According to the invention, a tungsten carbide particle reinforcing phase for reinforcing the iron-based composite is successfully prepared through a laser cladding in-situ synthesis technology, and a transition layer is arranged between the coating and the matrix, so that atom binding between the coating and the matrix is realized and the bonding strength is relatively high.

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...

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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

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