低活化铁素体/马氏体钢焊接技术的研究现状

Research progress in welding technology of reduced activation ferritic/martensitic steel

低活化铁素体/马氏体钢具有高热导率、低热膨胀系数、耐高温、抗辐照性能优异等优点,被认为是目前快堆燃料组件和未来核聚变堆包层模块的关键结构材料,而焊接技术是其在核工业领域制备工业构件并获得广泛应用的关键。综述近年来国内外低活化铁素体/马氏体钢焊接研究进展,总结了不同焊接方法获得的焊接接头微观组织特征和力学性能。与其他焊接技术相比,搅拌摩擦焊作为新型固相连接工艺,可以避免传统熔焊方法产生的缺陷,大幅度地提高低活化铁素体/马氏体钢焊接接头性能,有望在低活化铁素体/马氏体钢焊接上实现广泛应用。

Reduced activation ferritic/martensitic steel has the advantages of high thermal conductivity,low thermal expansion coefficient,high temperature resistance and excellent radiation resistance.It is considered to be the key structural material for fast reactor fuel assemblies and future nuclear fusion reactor cladding modules.Welding technology is the key to its preparation of industrial components and its wide application in the nuclear industry.In this paper,recent progresses in welding technology of reduced activation ferritic/martensitic steel at domestic and foreign are reviewed.The microstructural characteristics and mechanical properties of welded joints of reduced activation ferritic/martensitic steel obtained by different welding methods are summarized.Compared with other welding techniques,friction stir welding,a new solid state joining process can avoid the defects caused by the traditional welding method and greatly improve the performance of reduced activation ferritic/martensitic steel welded joints,which shows the potential for wide applications to welding of reduced activation ferritic/martensitic steel.