Laser cladding repairing method of mine hydraulic support and repairing powder

Abstract

The embodiment of the invention discloses a laser cladding repairing method of a mine hydraulic support and a repairing powder. The laser cladding repairing method of the mine hydraulic support comprises the steps of cleaning an oil cylinder and removing oil contamination, corrosion and peeling impurities; checking oil cylinder defects; selecting the repairing powder; starting a semiconductor laser generator in cladding equipment to adjust technical parameters of the equipment so as to carry out laser cladding repairing; checking surface roughness and hardness; and packaging. The repairing powder comprises chromium, carbon, boron, silicon, nickel, molybdenum, niobium and iron. According to the laser cladding repairing method of the mine hydraulic support, the repairing difficult problem ofthe oil cylinder is solved, the production efficiency is enhanced by 40%, materials are saved by about 20%, and the quality qualified ratio reaches 95%. The repairing powder has the advantages of high hardness, HRC (Rockwell hardness) of 50-60, corrosion resistance and improvement of welding and cladding performance.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to a laser cladding repair method and repair powder for mine hydraulic supports. Background technique [0002] Laser cladding technology is a new surface modification technology that emerged with the development of high-power lasers in the 1970s. Laser cladding technology refers to placing selected coatings on the surface of the coated substrate in different filling methods. The layer material is melted simultaneously with a thin layer of the substrate surface by laser irradiation, and after rapid solidification, a surface coating with extremely low dilution and metallurgical bonding with the substrate material is formed, thereby significantly improving the wear resistance and durability of the substrate surface. Corrosion, heat resistance, oxidation resistance and electrical properties, etc. [0003] Laser cladding technology is a new technology with high economic benefits....

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Problems solved by technology

[0006] However, there are many fatal shortcomings in the electroplating repair process: First, the electroplating process will cause great pollution to the environment, which is contrary to the national policy of green manufacturing and environmentally friendly development, and is an industry strictly controlled by the state

Secondly, the electroplating layer is very thin, generally no more than 0.15mm, prone to peeling, delamination, bulging, peeling, rust and other defects, and the impact resistance is poor, so the service life is very short

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