前言随着我国社会主义工业生产和科学技术的飞跃发展,对宽钢带的生产,正越来越朝高速度和连续轧制的方向发展。因此,对在冷轧前后各连续生产线(诸如酸洗、镀锌、镀锡和退火线等)中钢带的焊接,要求速度快,接头具有足够的物理性能(强度和塑性)和均匀的组织,焊缝厚度不应超过基本金属厚度的8～10%。目前,国内宽钢带焊接所采用的弧焊、 Preface With the rapid development of China’s socialist industrial production and science and technology, the production of wide steel belts is increasingly moving towards high-speed and continuous rolling. Therefore, the welding of the steel strip in each continuous line (such as pickling, galvanizing, tinning and annealing line, etc.) before and after cold rolling requires fast speed, adequate physical properties (strength and ductility) and uniform texture , Weld thickness should not exceed 8 to 10% of the base metal thickness. At present, the domestic wide strip welding used in arc welding,