A preparation method of laser cladding wear-resistant plate based on synchronous progressive shear deformation

Abstract

The invention belongs to the field of laser cladding remanufacturing, and particularly relates to a laser cladding abrasion-resistant plate preparation method based on synchronous progressive shear deformation. The method comprises the procedures of surface abrasive blasting, laser cladding, progressive shear deformation and heat treatment, wherein the progressive shear deformation process comprises the steps that to the two ends of a cladding substrate are fixed correspondingly, and one of the ends can move freely in the vertical direction; a ball end cutter moves gradually along a predetermined path, the cladding plate is forced to conduct progressive shear deformation and to attach to a supporting slope; by adjusting the angle of the supporting slope, the degree of shear deformation ofthe cladding plate can be controlled; and the progressive shear deformation process and the laser cladding process are conducted synchronously, and the ball end cutter conducts shear deformation treatment on a recently solidified alloy layer immediately along with a molten pool. According to the laser cladding abrasion-resistant plate prepared through the method, columnar crystals and dendrites which are grown in an oriented mode are broken, fine isometric crystal are fomred, the structure is uniformized, the dislocation density is high, the compactness is good, and the strength and abrasion resistance are high. Meanwhile, the strength of the substrate is improved through shear deformation, the defects of an interface between the laser cladding layer and the substrate are overcome, the bonding strength is improved, and compared with laser cladding wear plates prepared through traditional methods, the laser cladding abrasion-resistant plate has more excellent comprehensive mechanical properties.

Description

technical field [0001] The invention belongs to the field of laser cladding remanufacturing, and in particular relates to a preparation method of a laser cladding wear-resistant plate based on synchronous progressive shear deformation. Background technique [0002] Laser cladding technology uses a high-energy laser beam as a heat source to melt the coating material with excellent wear resistance, corrosion resistance and heat resistance that is preset or synchronously supplied on the surface of the substrate, and forms a good metallurgical bond with the substrate. In order to obtain the surface modification technology for special requirements. This technology has the advantages of low dilution rate, small heat-affected zone, small distortion and deformation of cladding parts, and easy automation of the process. In the laser cladding process, the interaction between the laser, the powder material and the matrix to form the cladding layer is a complex melting-solidification m...

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Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for preparing a laser cladding wear-resistant plate based on synchronous progressive shear deformation, so as to make the microstructure of the prepared laser cladding layer finer , more uniform, while eliminating the internal defects of the cladding layer and enhancing the bonding strength with the substrate, so it has more excellent comprehensive mechanical properties

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