激光/等离子电弧复合热源能量参数对钛合金焊缝成形的影响

在对钛合金激光/等离子电弧复合焊与单一激光焊的焊缝成形进行比较的基础上,研究了激光在复合等离子电弧后主要焊接工艺参数对焊缝成形的影响.结果表明,随激光功率增大和焊接速度降低,复合焊与单一激光焊焊缝的横截面形貌均由钉形向近X形转变.与单一激光焊相比,复合焊焊缝的余高和咬边较大.激光/等离子电弧"协同效应"随激光功率和焊接速度变化而不同,从而影响复合焊焊缝的熔宽和熔宽比.随焊接电流从零增大到60 A,焊缝熔宽略有增大,而焊缝熔宽比基本保持不变.

Effect of energy parameters on weld shaping for hybrid laser plasma welding of titanium alloy

The characteristic of weld shaping for both hybrid laser/plasma welding and single laser welding of titanium alloy was compared and the effect of major energy parameters on weld shaping for hybrid laser/plasma welding was investigated.It showed that the weld cross section with both laser welding processes transformed from nail shape to near X shape with increase of laser power and decrease of welding speed.The strengthen height and the undercut of weld were larger with hybrid laser/plasma welding than those with single laser welding.The interaction between laser beam and plasma arc,which changed with laser power and welding speed,had an important influence on weld width and ratio of bottom to top width of weld.When welding current increased from 0 to 60 A,the weld width increased slightly and the ratio of bottom to top width of weld kept constant.