近年来激光深熔焊接技术在异种合金的高效、优质连接中的应用受到了研究人员的广泛关注.依据钢/铝异种合金接头界面反应过程中钢母材是否熔化,分别从激光深熔钎焊和激光深熔焊接两个角度来论述钢/铝异种合金激光深熔焊接工艺的研究进展.在激光深熔钎焊方面,从不同形式的激光热源形式来讨论钢/铝异种合金的国内外研究现状;在激光深熔焊接方面,按照接头的形式不同来分析钢/铝异种合金激光深熔焊接的国内外研究进展.最后,提出了钢/铝异种接头激光深熔焊接技术研究的重要方向.%Recently, laser keyhole welding technique has brought it widespread attention due to its good quality and high productivity in joining dissimilar alloys. The laser keyhole welding technique used in joining dissimilar alloys can be classified as keyhole welding-brazing and keyhole welding according to whether the steel base materials are melted or not at the interface of steel/Al joints. The research status of laser keyhole welding-brazed steel/Al joints is discussed in terms of dif-ferent laser beam sources in details. In considering laser keyhole welding of steel/Al joints, the research progress in abroad and at home is described by means of different joint configurations. Finally, a very import research direction of dissimilar joining steel/Al joints using laser keyhole welding technique is proposed.
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