Materials are still one of the main technical bottlenecks restricting the development of fusion reactors. Reduced activated ferritic/martensitic steel (RAFM) is considered one of the main candidate structural materials for fusion reactor cladding due to its good radiation resistance and mechanical properties. In the past 40 years, RAFM steel has made considerable progress, but numerous problems remain to be solved. The improvements in RAFM steel in recent years, such as chemical composition optimization, clean preparation technology, radiation performance, and applicable welding technology, were systematically summarized. A systematic review of new RAFM steels was conducted, the development direction of the traditional smelting process was analyzed, and the application of laser additive manufacturing technology to RAFM steel was introduced. The effect of irradiation on the microstructure and mechanical properties of RAFM steel was described, and welding methods of RAFM steel and their research progress were reviewed. Finally, the potential applications of Si, Ti, and Zr in improving the performance of RAFM steel, electroslag remelting technology in clean smelting, heat treatment process in optimizing radiation performance, and laser-beam welding in RAFM welding were prospected and summarized.

材料仍然是制约聚变反应堆发展的主要技术瓶颈之一。还原活性铁素体/马氏体钢 (RAFM) 因其良好的抗辐射性和机械性能而被认为是聚变反应堆包壳的主要候选结构材料之一。40年来，RAFM钢取得了长足的进步，但仍有许多问题有待解决。系统总结了近年来RAFM钢在化学成分优化、清洁制备技术、辐射性能、适用焊接技术等方面的改进。对新型RAFM钢进行了系统回顾，分析了传统冶炼工艺的发展方向，介绍了激光增材制造技术在RAFM钢中的应用。阐述了辐照对RAFM钢组织和力学性能的影响，综述了RAFM钢的焊接方法及其研究进展。最后对Si、Ti、Zr在提高RAFM钢性能、清洁冶炼中的电渣重熔技术、优化辐射性能的热处理工艺以及RAFM焊接中的激光束焊接等方面的潜在应用进行了展望和总结。