The laser beam welding of BT20 titanium alloy was conducted to investigate the weld shape, microstructures and properties. The full penetration weld characterietics produced by CO2 laser and by YAG laser were compared. The results show that the full penetration weld of YAG laser welding closes to 'X' shape, and weld of CO2 laser welding is 'nail-head' shape. Those results from special heating mode of laser deep penetration welding. The tension strength of CO2 laser and YAG laser joints equal to that of the base metal, but the former has better ductility. All welds consist mainly of the acicular alpha phase and a few beta phase in microstructure. The dendritic crystal of CO2 laser weld is a little finer than YAG laser weld. According to the research CO2 laser is better than YAG laser for welding of BT2O titanium alloy.


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    Title :

    Effect of laser characteristics on the weld shape and properties of penetration laser weld of BT20 titanium alloy


    Contributors:
    Chen Li (author) / Gong, Shuili (author) / Yao Wei (author) / Hu, Lunji (author)

    Published in:

    China Welding ; 13 , 1 ; 1-6


    Publication date :

    2004


    Size :

    6 Seiten, 4 Bilder, 4 Tabellen, 4 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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