激光冲击对Q235B中厚板气体保护焊焊缝显微硬度的影响

Effect of Laser Shock Processing on Microhardness of Q235B Plate Gas Protection Weld

研究了激光冲击的能量和冲击次数对Q235B中厚板气体保护焊焊缝显微硬度的影响。试验结果表明,激光冲击的能量越高,Q235B中厚板气体保护焊焊缝的显微硬度值越大;激光参数不改变的情况下,激光冲击处理次数越多,焊缝表面的显微硬度受到的影响程度也越大;激光冲击处理的效果不仅在冲击区域以内,而且还延伸到冲击区域的周边。

This paper studies the effect of laser impact energy and impact frequency on the microhardness of Q235B plate gas protection weld. Experimental results show that the higher energy of the laser shock is, the more of Q235B plate gas protection weld microhardness values are; when laser parameters do not change, the more times of laser shock processing are, the more microhardness on the surface of the weld the greater impact is; laser shock processing not only affects within the impact area, but also extends to the peripheral impact area.