Laser cladding technology innovates the laser cladding repair process for flange end faces

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　In mechanical transmission systems, the flanged end face serves as a key connecting component, enduring complex dynamic loads and frictional wear over time. Especially in heavy industry sectors such as petrochemicals, wind power equipment, and ship propulsion, failures of the flange surfaces often lead to the shutdown of the entire machine, resulting in economic losses of tens of thousands of yuan per hour. Compared to traditional repair methods, laser cladding technology is driving a new revolution in flange repair thanks to its precisely controllable energy output, extremely small heat-affected zone, and excellent metallurgical bonding properties. 　　I. Analysis of Common Damage Patterns on Flange End Surfaces As a core component of pipeline systems, flange connections suffer from several typical forms of damage at their end surfaces: 1. Sealing surface wear: Repeated cyclic loads cause regular grooves to form in the sealing grooves, significantly affecting the reliability of the seal. 2. Chemical corrosion: Erosion by the medium leads to punctual or localized corrosion pits, with depths ranging from 1–3 mm. 3. Mechanical damage: Scratches or impact-induced dents resulting from improper installation are common in equipment that is frequently maintained. 4. Thermal deformation defects: High-temperature conditions cause warping of the end surfaces, with flatness deviations of up to 0.2–0.5 mm. These damages can lead to issues such as seal failure and reduced connection strength. Although traditional arc surfacing repair is cost-effective, it has inherent defects such as a wide heat-affected zone (5–8 mm) and significant deformation. In contrast, laser cladding technology is reshaping industry repair standards thanks to its dual advantages of \"precise repair + performance enhancement.\"