Research Progress in the Flattening Technology of Sterling Silver Strip Wire for Current Limiting Fuses

In this paper, the research progress and industrial application of the technology of flatting sterling silver strip wire for current limiting fuses are systemat ically reviewed. Sterling silver is irreplaceable in the field of fuse melt materials due to its excellent electrical conductivity(≥100% IACS), thermal conductivity(429 W/(m·K)), arc ablation resistance and ductility. However, the key technical bottlenecks such as grain uniformity control, surface defect suppression and dimensional accuracy control in the machining process seriously restrict the stability of the breaking performance of the fuse. This paper analyzes the core processes of melting casting, cold drawing, wire rolling and annealing, and reveals the core problems such as casting defects(pores, inclusions), excessive rolling thickness tolerance(>±1.5 μm), low yield(<80%) and discrete properties caused by non-standard annealing process. The research further proposes cutting-edge technology paths such as high purification(purity ≥99.9995%), fine crystallization(grain size ≤500 nm), intelligent processing(multi-parameter collaborative regulation based on digital twin) and short process manufacturing(energy consumption of tons of silver material ≤300 kWh), and emphasizes the localization of equipment, the integration of the whole industry chain and the construction of a standardized system. Achieve the autonomy of high-end silver strip(localization rate ≥90%), and promote the evolution of power protection devices to ultra-fast response and high reliability. This paper provides theoretical support and engineering solutions for the development and industrialization of high performance fuse materials.