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建立了异种镁铝合金包覆接头连续多缝搅拌摩擦包覆工艺参数(旋转速度、焊接速度和重叠比)和质量表征(结合抗拉强度,剪切强度和腐蚀)的经验关系,研究了工艺参数对包覆性能的影响。采用多尺度优化过程得到了理想的加工条件,在该条件下制备得到的复合板具有较高的界面强度和较低的腐蚀速率。结果表明,薄的富铝连续层和不规则富镁区由金属间化合物Al_3Mg_2和Al_(12)Mg_(17)组成,机械联锁的性质对接头界面强度有很大的影响。另一方面,在搅拌摩擦过程中镁混合到铝板的量对包覆接头的耐蚀性影响很大。弯曲测试表明,包覆接头具有优良的延展性。
The empirical relationship between parameters (rotational speed, welding speed and overlap ratio) and mass characterization (combined with tensile strength, shear strength and corrosion) of continuous multi-slit friction stir welding of heterogeneous magnesium alloy clad joints was studied. Effect of parameters on coating properties. The multi-scale optimization process is used to obtain the ideal processing conditions. The composite plate prepared under this condition has higher interfacial strength and lower corrosion rate. The results show that the thin Al - rich continuous layer and the irregular Mg - rich zone are composed of intermetallic compounds Al_3Mg_2 and Al_ (12) Mg_ (17). The mechanical interlocking properties have a great influence on the interface strength. On the other hand, the amount of magnesium mixed into the aluminum plate during the friction stir process greatly affects the corrosion resistance of the coated joint. Bending tests show that the coated joint has excellent ductility.