铝合金搅拌摩擦焊技术研究存在的问题及趋势

搅拌摩擦焊(Friction Stir Welding-FSW)是目前铝、镁、铜及有色金属等轻合金连接的最先进连接技术之一,FSW与传统熔焊相比,在工艺过程、接头性能等方面具有许多优势.在讨论FSW技术特征、工艺特点及应用研究的基础上,对目前国内外有关FSW技术的研究现状、发展趋势及存在问题进行了详细综述,所涉及的问题是在工业化铝合金结构制造领域(如飞机机身结构、高速客车及汽车车体结构等)大规模推广应用FSW技术必须解决的基础性问题;其次讨论基于FSW研究开发的新思路及新工艺,尤其是搅拌摩擦点焊技术(Friction Stir Spot Welding-FSSW)的原理、特点及在汽车车体轻量化开发中的巨大应用前景.

Trends and problems for current study of aluminum alloy FSW technology

Friction Stir Welding (FSW) is one of the best advanced joining technologies currently for welding aluminum, magnesium, copper and light metals etc. , and it have many advantages on aspects of processing and performances compared with the traditional fusion welding methods. Based on the discussion of FSW technology mechanism,processing features and industrial application, the trends and problem for the current study of FSW technology have been reviewed in detail and the concerned problems are the key fundamental problems that should be re-solved for the industrial applications of FSW such as airplane body frames,high-speed vehicles and automobile structures etc. Secondly discus-sing the new methods and technologies developed from the FSW investigation, especially the principle and characteristics of Friction Stir Spot Welding (FSSW) technology and its greatly potential application in the automobile industry.