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碳化硅颗粒(SiC_p)增强铸造铝基复合材料(MMC)在制造高比强、高温性能好和耐磨的轻质结构件中得到广泛应用。焊接接头的性能取决于搅拌摩擦焊(FSW)的工艺参数。研究铸造AA6061/20%SiC_p(体积分数)金属基复合材料焊接接头的抗拉强度、缺口拉伸强度和硬度,建立搅拌摩擦焊工艺参数(刀具转速、焊接速度和轴向力)与接头性能(抗拉强度、缺口拉伸强度和焊点硬度)之间的关系,确定最佳的焊接条件,以最大限度地提高接头的力学性能。结果表明,当搅拌针转速为1370 r/min、焊接速度为88.9 mm/min和轴向力为9.6 kN时,接头的最大抗拉强度、缺口拉伸强度和硬度分别为265 MPa、201 MPa和HV114。
Silicon Carbide Particles (SiC_p) Reinforced Cast Aluminum Matrix Composites (MMC) are widely used in the manufacture of lightweight structural parts with high specific strength, good high temperature performance and wear resistance. The performance of a welded joint depends on the process parameters of FSW. The tensile strength, notched tensile strength and hardness of AA6061 / 20% SiC_p (volume fraction) metal-matrix composite welded joint were studied, and the parameters of friction stir welding (tool speed, welding speed and axial force) Tensile strength, notched tensile strength and weld point hardness) to determine the best welding conditions to maximize the mechanical properties of the joint. The results show that the maximum tensile strength, notched tensile strength and hardness of the joint are 265 MPa, 201 MPa and 1000 MPa, respectively, when the rotating speed of the pin is 1370 r / min, the welding speed is 88.9 mm / min and the axial force is 9.6 kN HV114.