中国激光, 2008, 35 (11): 1773, 网络出版: 2008-11-17
Nd∶YAG激光焊接殷钢材料的工艺研究
Nd:YAG Laser Beam Welding Invar36 Alloy
摘要
利用Nd:YAG脉冲激光作为焊接热源,对殷钢材料Invar36进行了对焊实验,分析了工艺参数(激光功率、焊接速度、脉冲宽度和离焦量)变化对焊缝的表面形貌、熔宽以及熔透性的影响。对2 mm厚度的殷钢对焊接头的硬度变化进行了检测,同时对比分析了焊缝和基体的金相组织。结果表明,激光功率和脉宽是影响焊缝熔深、熔宽和热影响区大小的主要因素,激光焊接速度的选择范围相对较小,离焦量主要影响焊缝的宽度和熔透性,焊缝的组织成分没有发生明显变化,显微硬度略低于基体,焊缝处的金相组织为奥氏体柱状晶,并且呈现奥氏体晶粒粗化现象。
Abstract
Nd∶YAG laser beam butt-welding of invar36 alloy is carried out. The influence of the welding line′s surface, bead penetration and width to the laser parameter is investigated with plate-welding. The composition and hardness of the fusion zone is investigated with the butt-welding of the thickness of 2 mm. The result indicated that: laser power and pulse duration are the main factors which influence the weld bead penetration, weld width and heat affect zone (HAZ). There is a narrow selection range of the welding speed. The defocusing distance mainly affects the weld bead penetration and weld width. The composition of the welding-line has no obviously change, the hardness is appreciably lower than base body. The crystallographic orientation of the welding line had columnar crystals appeared and austenite growth.
吴东江, 尹波, 张维哲, 金洙吉. Nd∶YAG激光焊接殷钢材料的工艺研究[J]. 中国激光, 2008, 35(11): 1773. Wu Dongjiang, Yin Bo, Zhang Weizhe, Jin Zhuji. Nd:YAG Laser Beam Welding Invar36 Alloy[J]. Chinese Journal of Lasers, 2008, 35(11): 1773.