Ultra-thin non-oriented electrical steel is a very thin (usually less than 0.3 mm) ferrosilicon soft magnetic alloy with a high silicon content. It is a key advanced material for manufacturing high-efficiency motor cores and is particularly suitable for working in high-frequency environments. Producing this "thin as a cicada's wing" yet high-performance material requires overcoming a series of technical and process challenges: 1. Rolling and annealing process: Rolling steel to a uniform thickness of 0.1 mm is a significant challenge in itself. Even more critical is the subsequent continuous annealing process. On annealing lines that can stretch over a kilometer, it is imperative to ensure that the extremely thin strip does not deviate, wrinkle, or break, and that stable welding is achieved. This requires extremely high process control precision. 2. Composition and structure control: By adjusting the content of elements such as silicon (Si) and aluminum (Al), and precisely controlling the hot rolling, cold rolling, and annealing temperatures and times during the production process, we optimize the material's grain structure and magnetic properties. The goal is to achieve the optimal balance between low iron loss and high magnetic induction. 3. Exploring Short-Process Technology: Traditional multi-step cold rolling (such as two-step cold rolling and three-step cold rolling) with intermediate annealing is a long and costly process. The industry is actively developing short-process manufacturing methods, such as attempting to eliminate normalizing treatments or optimize rolling process design, in order to reduce costs and improve efficiency while maintaining performance. The excellent properties of ultra-thin non-oriented electrical steel make it a core functional material in many high-end equipment fields: 1. High-end new energy vehicle drive motors: This is currently the most important and fastest-growing application area. Using ultra-thin silicon steel sheets (e.g., 0.20mm) can significantly improve the efficiency and power density of motors, which is one of the keys to improving the range and performance of electric vehicles. 2. High-end drones and precision servo motors: These devices have extremely high requirements for motor weight, size, and response speed. Ultra-thin electrical steel can meet their lightweight and high-efficiency needs. 3. High-tech military equipment and aerospace: High-efficiency motors and special generators in related equipment require materials that can operate stably in complex and harsh environments. Ultra-thin, high-grade electrical steel is an important choice. 4. High-end home appliances and high-efficiency industrial motors: As energy efficiency standards increase, more and more variable-frequency home appliances and industrial motors are beginning to use thinner electrical steel to improve energy efficiency. The R&D and production of ultra-thin non-oriented electrical steel reflects China's technological strength in new materials and high-end manufacturing. Its development has directly driven technological progress in key industries such as new energy vehicles and intelligent manufacturing.