Application of Su***cing Technology in the Metallurgical Industry

The metallurgical industry features harsh operating conditions with long-term exposure to high temperatures, heavy loads, severe abrasion, medium corrosion and impact fatigue. Core equipment suffers rapid wear and tear, leading to high replacement costs and heavy losses caused by production downtime. As an efficient process for su***ce strengthening and component repair, su***cing welding has become a key technology to ensure stable equipment operation, cut costs and improve efficiency in metallurgical production. It is widely applied to critical equipment throughout the whole processes of iron******, steel******, continuous casting, steel rolling and material conveying.
In the iron****** process, su***cing is mainly used for components such as blast furnace chutes, bell tops, distributing chutes, sinter machine liners, crusher hammers and inner linings. These parts are constantly subjected to scouring wear from ores and sintered ore as well as corrosion by high-temperature flue gas. Su***cing with high-chromium and tungsten carbide-based wear-resistant alloys can form high-hardness wear-resistant layers, which greatly enhance impact and scouring resistance, effectively extend the service life of liners and chutes, and reduce frequent part replacements and production line shutdowns.
Steel****** and continuous casting systems represent the core application field of su***cing technology. Key components including continuous casting rolls, segment rolls, mould copper plates, ladle nozzles and converter trunnions all rely on su***cing for reinforcement. Continuous casting rolls are in long-term contact with high-temperature molten steel and cooling water, prone to su***ce wear, pitting and thermal cracking. Submerged arc su***cing and pla**a su***cing are adopted to clad high-temperature resistant and thermal fatigue resistant alloy layers, which can repair su***ce damages and restore rolling accuracy, extending the service life by 2 to 3 times. Su***cing nickel-based and cobalt-based alloys on mould copper plates can effectively resist scouring and thermal corrosion from high-temperature molten steel, prevent plate deformation and steel leakage, and ensure continuous and stable continuous casting production.
In steel rolling production lines, various work rolls, backup rolls and straightening rolls are major targets for su***cing treatment. During rolling operations, rolls bear tremendous rolling force, friction from workpieces and alternating thermal stress, resulting in su***ce spalling, wear and cracks. Multi-layer su***cing repair with special welding wires for rolls can restore su***ce hardness and wear resistance. The performance of repaired rolls can even surpass that of new ones, greatly lowering the procurement cost of large-sized rolls, stabilizing the rolling quality of plates and profiles, and raising the finished product rate.
In addition, su***cing technology is commonly applied for su***ce modification and defect repair on vulnerable parts in metallurgical plants, such as material conveying pipelines, dust removal fan impellers, sintering trolleys, gear shafts and hydraulic plungers. Customized alloy cladding layers featuring wear resistance, high temperature resistance, corrosion resistance and impact resistance can be fabricated via su***cing according to different working conditions. It realizes service life extension of equipment without replacing base bodies, cuts spare parts consumption and maintenance costs, ****** it an indispensable core process for modern metallurgical enterprises to improve quality, reduce consumption and achieve green production.