铝和不锈钢FSW对搭接接头界面结构及性能研究
发布时间：2018-09-10 18:13
【摘要】：采用搅拌摩擦焊接方法,设计了基于"差高-偏置"的对搭接接头,对厚度为4mm的5A06铝合金和厚度为2mm的316L不锈钢进行了搅拌摩擦焊接(Friction stir welding,FSW)焊接试验。通过观察焊缝金相形貌发现,焊接界面光滑平整,没有形成Hook钩,在焊缝靠近界面位置形成了钢颗粒增强铝基复合组织和河流状花样组织结构。通过SEM观察,铝-钢之间形成了一层厚度约为3μm的中间过渡层。显微硬度及拉伸测试结果表明,过渡层的显微硬度较高,接头的拉伸强度达到了铝合金母材强度的89.7%。
[Abstract]:Friction stir welding (FSW) method was used to design a pair lap joint based on "differential high bias". The 5A06 aluminum alloy with thickness of 4mm and stainless steel 316L with thickness of 2mm were welded by friction stir welding (Friction stir welding,FSW). By observing the metallographic morphology of the weld, it was found that the interface of the weld was smooth and smooth, and no Hook hook was formed. The steel particle reinforced aluminum matrix composite structure and fluvial pattern structure were formed near the interface of the weld. An intermediate layer of about 3 渭 m thickness was formed between aluminum and steel by SEM. The results of microhardness and tensile test show that the microhardness of the transition layer is high, and the tensile strength of the joint reaches 89.7 of the strength of the aluminum alloy base metal.
【作者单位】： 南京航空航天大学材料科学与技术学院;
【基金】：国家自然科学基金(51475232)资助项目 江苏高校优势学科建设工程(PAPD)资助项目
【分类号】：TG453.9
[Abstract]:Friction stir welding (FSW) method was used to design a pair lap joint based on "differential high bias". The 5A06 aluminum alloy with thickness of 4mm and stainless steel 316L with thickness of 2mm were welded by friction stir welding (Friction stir welding,FSW). By observing the metallographic morphology of the weld, it was found that the interface of the weld was smooth and smooth, and no Hook hook was formed. The steel particle reinforced aluminum matrix composite structure and fluvial pattern structure were formed near the interface of the weld. An intermediate layer of about 3 渭 m thickness was formed between aluminum and steel by SEM. The results of microhardness and tensile test show that the microhardness of the transition layer is high, and the tensile strength of the joint reaches 89.7 of the strength of the aluminum alloy base metal.
【作者单位】： 南京航空航天大学材料科学与技术学院;
【基金】：国家自然科学基金(51475232)资助项目 江苏高校优势学科建设工程(PAPD)资助项目
【分类号】：TG453.9
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