As-cast in-situ nanoparticle reinforced CuSn10Zn2Fe1.5Co0.5 (wt-%) alloy was selected as base metal (BM) and filler for welding. Butt joints were obtained by tungsten inert gas (TIG) welding. Microstructure of weld metal was characterised. Nanoparticles with an average diameter of about 5 nm are uniformly dispersed in the primary copper matrix in size of micro or nano scales for weld metal. A large number of nano grains with size of about 20 nm can be found in the weld metal as well. Mechanical properties of weld metal were comparable to those of heat-treated BM. Strengthening and toughening strategies for the weld metal were discussed through fabricating in-situ nanoparticles and nano grains in the weld metal.

选择铸态原位纳米颗粒增强的CuSn10Zn2Fe1.5Co0.5（wt％）合金作为贱金属（BM）和焊接填料。对接接头是通过钨极惰性气体保护（TIG）焊接获得的。表征了焊接金属的微观结构。平均直径约为5 nm的纳米颗粒均匀地分散在初级铜基体中，其尺寸为焊缝金属的微米级或纳米级。在焊接金属中也可以发现许多尺寸约为20 nm的纳米晶粒。焊接金属的机械性能与热处理的BM相当。通过在焊缝金属中原位制备纳米颗粒和纳米晶粒，讨论了焊缝金属的强化和增韧策略。