随着海上风电快速发展和装机容量攀升，市场对大型风电主轴需求激增，这对高性能主轴材料及其先进制 造工艺的研发提出了迫切要求。针对大型海上风电主轴结构及使用需求，从铸造主轴材料、关键铸造及加工工艺3个方 面进行创新研究。 材料上，优化成分配方并创新球化和孕育处理工艺，获得了铸态高性能固溶强化铁素体球墨铸铁，满 足了海上风电对主轴高强度、高韧性、抗低温冲击的严苛需求；铸造工艺集成无冒口自补缩等技术，提高了工艺出品率 和成品率；采用立式多头数控机床和优化的机加工工艺，提高了加工精度和生产效率。 本主轴生产技术降低了生产成 本，并投入批量化工业生产，提高了主轴整体的成品率和经济效益。

With the rapid development and increasing installed capacity of offshore wind power, the market demand for large main wind power shafts has increased sharply, necessitating urgent requirements for the research and development of high-performance main shaft materials and advanced manufacturing processes. Focusing on the main shaft structure and usage requirements of large offshore wind turbines, innovative research has been conducted from three aspects: casting material, key casting technology, and machining technology. In terms of materials, by optimizing the chemical composition and innovating nodulizing and inoculation processes, high-performance solid solutions strengthened with as-cast ferritic ductile iron have been obtained, meeting the stringent requirements of the main shaft for high strength, high toughness, and low-temperature impact resistance. The integration of the casting process with self-feeding technology has improved the process yield and significantly decreased the product scrap rate. The use of vertical multihead CNC machine tools and optimized machining processes has improved machining accuracy and production efficiency. This main shaft production technology reduces production costs and has been put into large-volume industrial production, improving the overall production yield and economic benefits.