A self designed welding head is described. The welding head can divide one torch into two equally and the two focuses are in series along the weld.

通过利用自行研制的分束焊接头将一束激光分为能量相当的两束激光，在沿焊缝方向上串联产生了两个焦点。

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The effective method to improve the impact ductility of this zone is to change the welding process and conduct post-weld heat treatment, which is help to divide M-A component into ferrite and carbide.

改善焊接工艺或进行焊后热处理，使M - A组元分解成铁素体和碳化物是提高其韧性的有效方法。

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