The microstructure of the welded joints was studied by optical microscopy. It is found that the weld nugget has a dynamic recrystallization, fine isometric crystal structure.
通过对焊接接头组织的分析，发现焊核区晶粒为明显的细化再结晶等轴晶；
The deposition efficiency of welding wires metal, microstructure and mechanical properties of welded joints were studied.
研究了交流和直流反接两种型式下焊丝金属熔敷率、焊接接头金属组织以及接头的力学性能。
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