Mg和Si质量比对6系铝合金性能的影响

6系铝合金中Mg和Si元素是主要强化元素，其中Mg和Si质量比是其成分配比中的重要参数。通过对材料微观组织、力学性能、导电性和韧性进行测试和分析，研究Mg和Si质量比对6系铝合金组织形貌和性能的影响。研究结果表明：随Mg和Si质量比的增加，6系铝合金组织中粗晶层厚度与析出相的尺寸均减小，屈服强度、抗拉强度和硬度均小幅度降低，电导率呈上升趋势，同时抗裂纹性能逐渐提高；当比值为1.30时，屈服强度为278 MPa，抗拉强度为300 MPa，维氏硬度为97.6 ，电导率可达51.86 %IACS，压溃裂纹长度约为10 mm，承受的载荷最大，吸收功最大，压溃性能最好。

Effect of Mass Ratio of Mg to Si on the Properties of 6 Series Aluminum Alloys

Mg and Si are the main strengthening elements in the 6 series aluminum alloys, and the mass ratio of Mg to Si is an important parameter among the composition ratios. The effects of mass ratio of Mg to Si on the morphology and properties of 6 series aluminum alloys were studied by testing and analyzing the microstructure, mechanical properties, conductivity and toughness of the materials. The results indicate that with the increase of the mass ratio of Mg to Si, the thickness of the coarse grain layer and the size of the precipitated phase are decreased, the yield strength, tensile strength and hardness are decreased slightly, the conductivity is increased, and the crack resistance is improved gradually. When the ratio is 1.30, the yield strength is 278 MPa, the tensile strength is 300 MPa, the Vickers hardness is 97.6, the conductivity can reach 51.86 %IACS, the length of crushing crack is about 10 mm, the bearing load is the largest, the absorbed energy is the largest, and the crushing performance is the best.is the best.