Due to the harsh working conditions of oil wells, many downhole tools bear long-term loads and are used under corroded and worn working conditions, causing them to fail and destroy prematurely, thereby shortening their lifespan. For example: large rotor journals, roulettes, sleeves, bearings, oil drill collars, etc. However, these parts are often very expensive, involving many types of parts, in complex shapes, and with large differences in working conditions. Suspension of production for maintenance and replacement of components not only increases material costs, but also affects oilfield production and brings many losses. Most oil drilling industries choose laser cladding technology to prepare and repair the hard coating in the wear area of large parts. There is no need for preheating, and the subsequent processing volume is small, which shortens the repair cycle and improves the surface hardness and corrosion resistance of the workpiece. And the wear resistance greatly improves the
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