脉冲激光焊接H62黄铜

Study on pulse laser welding of H62 brass

为了能用波长为1.06μm的Nd:YAG激光器对高反射率的H62黄铜进行激光焊接,通过理论分析和试验验证,合理地设置脉冲激光的峰值功率、单脉冲能量、频率、脉宽、脉冲波形、焊接速度、离焦量等参数,成功地对H62黄铜进行了脉冲激光焊接.结果表明,在用HWLW-300A型激光焊接设备对两块厚度为x(mm)的H62黄铜进行对接焊时,选用单脉冲激光能量约为10.x(J/mm)左右,快速上升、缓慢下降的脉冲波形,在负离焦2mm的情况下,并使激光光斑直径d、脉冲激光频率f和焊接速度v之间满足f.d=(1.2～1.4).v时,能成功地进行激光焊接.

In order to conduct laser welding of H62 brass which has high reflectivity for laser beam with wave length of 1.06 μm,such parameters as pulse laser peak power,laser frequency,single pulse energy,pulse width,pulse waveform,welding speed and defocusing amount etc are reasonably set up through theoretical analysis and experimental verify. H62 brass can be welded by pulse laser successfully. The results show that the pulse laser welding system of HWLW-300A which possess single pulse energy of about 10·x(J/mm),the pulse waveforms of sudden rise and slow fall,the defocusing amount of-2mm and the relationship among laser beam diameter d,pulse laser frequency f and welding speed v meet the f·d=(1.2~1.4)·v can successfully weld H62 brass with thickness of x mm.