通过改变焊缝夏比冲击试样的缺口取向，研究了缺口位向对多层焊缝金属韧性及断裂过程的影响。
By changing the nolch local ion of Charpy impact test specimens studied the effect of nolch location on toughness and cracking process in multi-layer welds.
多层焊和附加工艺焊缝是提高焊接接头性能的有效途径。
The properties of the welded joint may be effectively enhanced by adopting neat multi-layer welding and technical welds.
多层焊和工艺焊缝是改善HAZ性能的有效途径。
It is an effective way to improve the properties of HAZ by adopting multilayer welding and technical weld.
多层焊和工艺焊缝是改善HAZ性能的有效途径。
It is an effective way to improve the properties of HAZ by adopting multilayer welding and technical weld.
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