焊接是汽车制造中最主要的工序之一，已经在实际生产中得到广泛应用，汽车用钢和焊接工艺均会对最终的焊接质量产生重要影响。从材料的强化机制和表面镀层性质两方面，阐述了汽车用钢的基本分类及其特点。详细介绍了汽车用钢的点焊、激光焊、电弧焊等常见焊接工艺的特点及应用范围，从钢板镀层特性、化学成分、焊接工艺参数、焊接的接头性能等角度，综述了国内外对汽车用钢不同焊接工艺影响因素的研究进展。结合未来第三代先进高强汽车用钢、铝合金和镁合金的研发与应用，探讨了当前汽车用钢的焊接新技术，对未来焊接技术的发展趋势进行了展望。

As one of main processes in automobile industry, welding technologies are widely utilized. It is important for welding quality that automotive steel sheets and welding methods are employed. Classifications and characteristics for automotive steel sheets are illustrated from the strengthening toughening mechanisms and coating types. The features and application range of many welding technologies in automotive industry, such as spot welding, laser welding and arc welding, are discussed in detail. The development of influencing factors for these welding technologies are reviewed by coating and chemical compositions of sheets, welding parameters, joint properties. Combining the research and application of the third generation advanced high strength steel, aluminum alloy and magnesium alloy for automotive industry, many new hybrid welding technologies are also investigated. The future of welding technologies for automotive steel sheets is also discussed.