【摘 要】
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The evaporation and oxidation of zinc during the welding process was studied. The characteristics of mi-crostructure and micro-hardness of the ZA alloys bond ar
【机 构】
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College of Materials Science and Engineering,Institute of Ji'nan Boiler Pressure Vessel Inspection
论文部分内容阅读
The evaporation and oxidation of zinc during the welding process was studied. The characteristics of mi-crostructure and micro-hardness of the ZA alloys bond area that welded by TIG were investigated by using TEM,SEM and other methods. The results show that, by using the same filler metal as the parent metal, zinc content inbond area is lower than that in the weld metal and the base metal. The main structure of the bond area is columnardendrite, including Zn, Al4 Cu9 , CuTi2, Al7 Cu3 Mg6 phases. There are many changes of structure in the bond area.The structure near the weld is some tiny slice Zn and a-Zn. The structure near the parent metal is rather coarse butis still a little tiny than that of the parent metal. As the tiny structure of the heat affected zone has high hardness, itcan strengthen the weld, and thus improve the mechanical properties of the welded joint.
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