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论文类型：期刊论文

发表时间：2022-06-25

发表刊物：中国激光

所属单位：机械工程学院

卷号：40

期号：3

页面范围：0303003

ISSN号：0258-7025

摘要：Continuous wave (CW) Nd:YAG laser beam bead-on-plate welding of Fe-Ni
   (36%, mass fraction) alloy is carried out. The morphology of the cross
   section is analyzed by optical microscope. The influence of welding
   parameters (laser power, scanning speed, defocusing amount, welding
   angle and heat input) on the morphology of the cross section is studied.
   The results indicate that large negative focusing position will weaken
   the weldments, consequently, is of disadvantage to self-fusible welding.
   And the increase of laser power is more helpful to improve welding
   penetration than slowing down welding speed when the focusing position
   is fixed. The influence of the relationship between laser power and
   welding speed should be considered when heat input (laser power/welding
   speed) is used to characterize the morphology of the weld.

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