Laser fusing and coating process for wear resistant and etch-resistant coating of hydraulic support column cylinder and piston rod

Abstract

A laser cladding process of the wear-resisting anticorrosive coating of a hydraulic pressure support pillar cylinder barrel or a piston rod cylinder barrel comprises procedures as follows: the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are pretreated; the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are decreased, de-rusted and cleaned up by alcohol under room temperature; alloying powder is chosen and an automatic powder feeder is adjusted; the iron base alloying powder with good wear-resisting anticorrosive property and sound metallurgy compatibility with a matrix is selected and the iron base alloying powder contains major constituents, including Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta and B; and at last, the automatic powder feeder is adjusted. Adjusting the automatic powder feeder can lead the alloying powder from an automatic feeding end to a laser melting pool and feeding amount is adjusted so that the thickness of the alloying coating reaches 0.6mm to1.2mm. The alloying coating of the invention is even and dense and has good wear-resisting anticorrosive property. Compared with galvanization, the wear-resisting anticorrosive property and the service life of the standing pillar cylinder barrel and the piston rod manufactured by the invention are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of laser cladding, and in particular relates to a process for preparing a wear-resistant and corrosion-resistant alloy coating on the surface of a column cylinder and a piston rod of a mine hydraulic support. Background technique [0002] The hydraulic support column is a key component in mining equipment, and the column cylinder and piston rod are the main components of the column. When the hydraulic support column cylinder and piston rod work, they not only bear a strong mechanical load, but also are corroded by the emulsion and worn and scratched by the hard particles entering the emulsion. Therefore, the column cylinder and piston rod are usually made of high-strength 27SiMn alloy structural steel, and the working surface is usually electroplated with wear-resistant and anti-corrosion coating to meet the wear-resistant and anti-corrosion function. The coating material is generally copper-tin alloy or chr...

AI Technical Summary

Problems solved by technology

Due to the physical combination between the electroplating coating and the base material, the binding force is not high, and the coating often falls off when the piston rod and cylinder work for a long time. Mine material consumption and reduced production efficiency

The electroplating process also has the problem of environmental pollution caused by sewage discharge