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由于其复杂的特性,铝-铜异种焊接逐渐受到科学界和工业界的关注。在不同旋转速度(800和1000 r/min)和行进速度(20和40 mm/min)组合条件下,对6063铝合金与HCP铜板材进行非偏移搅拌摩擦焊接,并对接头强度进行评价。采用扫描电镜和EDS元素分布研究不同参数组合下的材料流动。利用显微硬度测试和X射线衍射技术对显微组织和界面金属间化合物进行研究。材料流动分析表明,与800 r/min和40 mm/min(快冷却速度154 K/s)相比,在800 r/min和20 mm/min条件下(低冷却速度88 K/s),能量输入足以塑化两种材料,并形成热力学稳定的硬质金属间化合物Al4Cu9和Al Cu4,得到最高的接头强度(78.6%铝基体强度)。
Due to its complex characteristics, aluminum-copper dissimilar welding has attracted the attention of the scientific community and the industrial community. The non-offset friction stir welding of 6063 aluminum alloy and HCP copper plate under the condition of different rotating speed (800 and 1000 r / min) and traveling speed (20 and 40 mm / min) was carried out, and the joint strength was evaluated. Scanning electron microscopy and elemental distribution of EDS were used to study the material flow under different parameters. The microstructure and interfacial intermetallics were investigated by microhardness test and X-ray diffraction. Material flow analysis showed that at 800 r / min and 20 mm / min (low cooling rate of 88 K / s) compared to 800 r / min and 40 mm / min (fast cooling rate of 154 K / The input was sufficient to plasticize both materials and form the thermodynamically stable hard intermetallics Al4Cu9 and AlCu4 resulting in the highest joint strength (78.6% aluminum matrix strength).