Multi-scale ceramic particle coupling enhanced laser cladding iron-based wear-resistant coating and preparation method thereof

Abstract

The invention relates to the technical field of new materials, and particularly discloses a multi-scale ceramic particle coupling enhanced laser cladding iron-based wear-resistant coating and a preparation method thereof. The iron-based wear-resistant coating is prepared by mixing the following raw materials in percentage by weight and cladding the raw materials on the surface of a base material through a laser cladding method: 5-10% of ceramic particles with a particle size of 0.5-3 microns, 5-15% of ceramic particles with a particle size of 15-45 microns, 10-30% of ceramic particles with a particle size of 90-150 microns, and the balance of iron-based alloy powder. The preparation method comprises the following steps: mixing and drying the 0.5-3 [mu]m ceramic particles, the 15-45 [mu]m ceramic particles, the 90-150 [mu]m ceramic particles and the iron-based alloy powder to obtain an iron-based composite powder, and cladding the obtained iron-based composite powder on a base material by adopting laser cladding to obtain the multi-scale ceramic particle coupling enhanced laser cladding iron-based wear-resistant coating. The method has the characteristic that the wear resistance of the iron-based wear-resistant coating can be effectively improved.

Description

technical field [0001] This application relates to the technical field of new materials, more specifically, it relates to a multi-scale ceramic particle coupling enhanced laser cladding iron-based wear-resistant coating and a preparation method thereof. Background technique [0002] Laser surface modification is a high-tech developed in the 1970s. It uses the characteristics of high radiation intensity, high directionality and high monochromaticity of laser to act on the surface of components to improve the surface properties of materials. Laser cladding is a kind of laser surface modification. Its principle is to make it the main alloy of the cladding layer through laser melting of the prepared alloy powder, and at the same time irradiate the metal surface with a high-energy laser beam to melt a thin layer of matrix metal. , so that the thin layer on the surface of the metal substrate and the cladding alloy are rapidly melted, reacted, and solidified to form a cladding laye...

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Problems solved by technology

[0004] At present, the commonly used method of introducing ceramic particles is the in-situ self-generation method. The in-situ self-generation method is to directly generate a fine-sized and uniformly distributed ceramic reinforcement phase by means of chemical reactions in the alloy. This reinforcement phase matches the matrix in situ. The interface bonding and thermodynamic stability are good, and the strength and toughness of the alloy are good, but the fine ceramic particles are difficult to play a good skeleton support role in the face of high stress wear conditions, and the protection of the matrix is ​​insufficient. Coating wear resistance is poor

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