Rollers are widely used in steel rolling, papermaking, rubber processing, as well as various material conveying and compaction processes. Under severe operating conditions, roller surfaces often face metal-to-metal wear, surface fatigue spalling, high-temperature oxidation, and corrosion. When roller surface precision drops or cracks appear, product quality is directly affected. Through hardfacing technology, specialized wear-resistant alloy materials can be used for online or offline repairs. After surfacing, it not only repairs worn parts but also imparts excellent wear resistance, fatigue resistance, or specific corrosion resistance to the roller surface, greatly reducing spare parts costs and improving production line stability.