Keywords: Pump casing crack repair, Stainless steel crack repair, Weld seam crack repair, Engine casing crack repair, Shaft wear repair, Keyway repair, Cold welding without cracking, Mold repair, Crack and porosity welding repair, Welding without deformation. Bearing seat wear repair Pump casing crack repair: Pump volute casings, compressor casings, tank containers, hydraulic cylinders, etc., due to casting defects, are prone to leakage and cracking under vibration and temperature differences during operation. Traditional welding techniques often cause secondary cracking damage due to unavoidable thermal stress and process selection, leading to the paradoxical phenomenon of leaks worsening with repair. Cold welding repair at room temperature can be applied to cracked areas, allowing immediate use after repair without causing stress changes to the surrounding areas. The repair offers high strength and efficiently addresses cracks. Shaft wear repair: Fatigue damage in high-speed rotating transmission shafts can be repaired using cold welding wear-resistant techniques, including roller press bearing seat repair, reducer shaft wear repair, keyway rolling key repair, and motor bearing seat repair. During operation or shutdown, mechanical equipment inevitably experiences gradual performance degradation due to wear, fatigue, fracture, deformation, corrosion, aging, etc., which may even lead to catastrophic consequences. Component wear, scratches, and dimensional deviations account for approximately 70% of mechanical part failures. Most equipment components are made of metal, which, due to its high strength and hardness, often results in a "hard-on-hard" relationship under vibration, impact, and other composite forces during production and operation. Over time, some impact deformations become permanent, reducing recovery stress and creating gaps that fail to meet operational requirements, leading to wear in relatively softer components. The use of new materials, processes, and technologies to repair and remanufacture damaged mechanical parts helps reduce production costs for enterprises. Yuke Metal Remanufacturing Repair Technology can be used to repair almost any hard surface defect, forming a strong bond with the base material. It offers excellent temperature and corrosion resistance, is machinable, and can even restore 90° right angles on a lathe, making it widely applicable across almost any industry. Application scope: Primarily repairs various worn shafts, bushings, bearing seats, keyways, threads, as well as localized scratches on hydraulic arms and rail surfaces. It can also repair and protect cracks and defects in various enamel tanks, metal tanks, various casings, pipelines, and valves.