Core Insights - The Chinese Academy of Sciences' Hefei Institute of Plasma Physics has achieved a significant breakthrough with the delivery of the world's largest toroidal field (TF) magnet coil box, weighing 400 tons, which is crucial for the commercial development of fusion energy [1][3][4] Group 1: Project Details - The TF coil box measures 21 meters by 12 meters, with a maximum welding thickness exceeding 360 millimeters, and its weight is double that of similar components used in the International Thermonuclear Experimental Reactor (ITER) [3] - The successful delivery of the TF coil box signifies that China has mastered several core technologies in high-end equipment manufacturing for fusion devices, establishing a comprehensive industrial supply chain covering design, processing, inspection, and transportation [3] Group 2: Technological Impact - The CRAFT project aims to tackle key systems and core technologies for fusion reactors, providing essential technical support for the design, construction, and operation of future fusion reactors [4] - The technologies developed during the manufacturing of the TF coil box, such as large precision component manufacturing and extreme environment material applications, are expected to benefit other high-end manufacturing sectors, including aerospace, energy equipment, and marine engineering [3]

从研发到完成制造，项目团队历时5年多时间，攻克了多项关键技术难题。在原材料研制方面，完成了 低温不锈钢316LMn（ITER级JJ1）材料的国产化、完成了百吨级316LN超大锻件和128毫米316LN超厚 钢板的研制。在制造技术方面，面对最大厚度达360毫米的焊接挑战，研发了大厚度激光焊接和超深窄 焊接的组合焊接技术、相控阵无损检测技术，实现了线圈盒焊接的控形控性；开发了30米长空间弯管的 精密成形、低温树脂与钎焊的冷却管固定技术，实现了冷却管的高精密安装。 环向场线圈盒的成功交付，是聚变能源商业化迈出的重要一步。相关技术还可应用于航空航天、能源装 备、船舶海工等领域。（记者洪敬谱） 记者10月10日从中国科学院合肥物质科学研究院等离子体物理研究所获悉，聚变堆主机关键系统综合研 究设施（CRAFT）项目日前取得重要进展——环向场磁体线圈盒研制成功并在安徽省合肥市交付。 环向场线圈盒是环向场磁体的主体承力结构部件，是磁体系统的重要组成部分，主要用于保护环向场线 圈绕组并支撑与固定着极向场磁体等其他超导磁体。环向场线圈盒由超低温奥氏体不锈钢316LN和 316LMn材料构成，该部件外形尺寸21米×12米，重400 ...

来源：科技日报 科技日报记者 洪敬谱 环向场磁体线圈盒。中国科学院合肥物质科学研究院等离子体物理研究所供图 环向场线圈盒是环向场磁体的主体承力结构部件，是磁体系统的重要组成部分，主要用于保护环向场线 圈绕组并支撑与固定着极向场磁体等其他超导磁体。环向场线圈盒由超低温奥氏体不锈钢316LN和 316LMn材料构成，该部件外形尺寸21米×12米，重400吨，是目前世界上最大的环向场磁体线圈盒，整 体尺寸是国际热核聚变实验堆（ITER）同类部件的1.2倍以上，重量约为其两倍。 从研发到完成制造，项目团队历时5年多时间，攻克了多项关键技术难题。环向场线圈盒的成功交付， 是聚变能源商业化迈出的重要一步。相关技术还可应用于航空航天、能源装备、船舶海工等领域。 记者10日从中国科学院合肥物质科学研究院等离子体物理研究所获悉，聚变堆主机关键系统综合研究设 施（CRAFT）项目日前取得重要进展——环向场磁体线圈盒研制成功并在安徽省合肥市交付。 ...

Core Insights - The successful delivery of the toroidal field coil box marks a significant step towards the commercialization of fusion energy [2] - The technology developed for the coil box has potential applications in aerospace, energy equipment, and marine engineering sectors [2] Group 1: Project Development - The toroidal field coil box, measuring 21 meters by 12 meters and weighing 400 tons, is the largest of its kind in the world, exceeding the dimensions of similar components in the International Thermonuclear Experimental Reactor (ITER) by more than 1.2 times and weighing about twice as much [1] - The project team took over 5 years to overcome multiple key technical challenges, including the domestication of low-temperature stainless steel 316LMn and the development of large-scale 316LN forgings and ultra-thick steel plates [1] - Advanced manufacturing techniques were developed, such as a combination of laser welding for thick materials and phased array non-destructive testing, to ensure the precision of the coil box welding [1] Group 2: Material and Technology Innovations - The coil box is constructed from ultra-low temperature austenitic stainless steel 316LN and 316LMn materials, showcasing advancements in material science for fusion applications [1] - Precision forming technology for 30-meter-long cooling pipes and the use of low-temperature resin with brazing for pipe installation were also developed, enhancing the overall assembly process [1]