HE130合金激光焊接线能量与焦点位置研究

Research of Linear Heat Input and Laser Focus Position for Laser Welding HE130 Titanium Alloy

实验研究了连续波Nd∶YAG激光焊接线能量和激光焦点位置对HE130合金焊缝成形质量的影响。通过试验确定了不同板厚HE130合金激光焊接时的有效线能量 ,并量化了有效线能量与熔深及深宽比的关系 ,得到了HE130合金激光焊接的有效线能量曲线和激光功率与焊接速度在不同板厚范围内的匹配曲线。为获得最佳的焊缝成形 (焊缝深宽比及焊缝背面成形 ) ,通过试验确定了不同板厚HE130合金激光焊接时的最佳激光焦点位置 ,并量化了它与板厚的关系 ,即最佳激光焦点位置曲线。

The effects of linear heat input and focus position on the HE130 alloy laser weld shaping quality using solid Nd∶YAG laser welding process with continuous wave were experimentally researched. The efficient laser welding linear heat input of HE130 alloy plates with various thickness were established through experiments and the relationship of the efficient linear heat input with the weld penetration and weld penetration/width ratio was quantified. The laser welding efficient linear heat input curve of HE130 alloy and the matching curve of laser power and welding speed in the range of different plate thickness were successfully made. The optimal focus positions while laser welding HE130 alloys with various thickness were experimentally acquired to get the optimal weld shaping including the larger penetration/width ratio and good rear shaping of the weld. The relationship between the plate thickness and the optimal laser focus position was then quantified and the optimal focus position curve was given.