【摘要】 以裁焊板工业生产为背景 ,对汽车用镀锌钢板的CO2 激光切割板坯的CO2 激光焊焊接性进行了试验研究。对于不等厚和等厚的镀锌板拼接进行CO2 激光焊接 ,在激光功率 4 0 0 0W时其焊接速度可达 0 .1m/s。对镀锌钢板激光切口拼接的激光焊接与铣口拼接的激光焊接的焊缝形貌和硬度进行了比较 ,它们产生的焊缝宽度在 0 .5～1.0mm范围 ,激光焊缝最大硬度比母材硬度高出 1～ 1.5倍 ,激光焊接对激光切口拼接与铣口拼接两者都可获得等同的宏观焊接质量。更多还原

【Abstract】 The CO₂ laser butt welding of galvanized steel sheets cut by the CO₂ laser was investigated for automotive manufacturing application. 4 kW was used to weld the galvanized steel sheets of different thickness, and the maximum speed reaches 0.1 m/s. The laser welded seams whose butt sides were cut by laser or mill was compared, and the hardness distribution was measured. The width of the laser welded seam was in the range of 0.5～1.0 mm,and the maximum hardnes of the welded seam overpass the matrix hardness 1～1.5 times. The laser welding produced similar qualities for the steel sheets cut by laser or mill.更多还原