摘要:为了解决由于铝合金框架强度不够所引起的框架整体重量过重,成本上升等问题,本研究尝试通过改变铝合金中硅,镁,铜的比例增加来合金的强度,研究了不同铜含量,镁含量及硅含量合金的拉伸强度,屈服强度,硬度等性能。研究结果表明:58090
(1) 添加铜,镁,硅元素,对铝合金的硬度有着显著的提高。
(2) 随着铜、镁和硅含量的增加,铝合金的抗拉强度和屈服强度均可得到相当程度的增强,但延伸率却相应地有一定程度的减小。
(3) 为提高6063铝合金的强度,并有较好的塑性,建议选择成分为0.6~1.0%Si,0.2~0.4%Cu和0.7~1.0%Mg的铝合金。
(4) 成分为0.941%Si- 0.356%Cu- 0.996% Mg的铝合金中基体为溶解了少量Mg、Si和Cu的固溶体,强化相主要为Si过量的Mg2Si。
毕业论文关键词:硬度;拉伸性能;微观结构
Non-standard aluminum alloy and its performance research
Abstract:To solve caused by insufficient strength aluminum alloy framework the framework of the overall weight is overweight, the problem such as rising costs, this study attempts to by changing the silicon in aluminum alloy, magnesium, copper, the proportion of added to the strength of the alloy, different content of copper is studied, and the content of magnesium and silicon content alloy tensile strength, yield strength, hardness and other mechanical properties. The results show that:
(1) Add copper, magnesium, silicon, for the hardness of aluminum alloy is improved.
(2) With the increase of copper, magnesium, and silicon content, the tensile strength and yield strength of aluminum alloy can get considerable increase, but the elongation is a certain degree of reduced accordingly.
(3) To enhance the strength of 6063 aluminum alloy, and has good plasticity, suggestion choice composition is 0.6 ~ 1.0% Si, Cu 0.2 ~ 0.4% and 0.7 ~ 1.0% Mg alloy.
(4) The composition of 0.941% Cu Si - 0.356% - 0.356% of Mg alloy substrate to dissolve a small amount of Mg, Si and Cu solid solution, strengthening phase mainly for Si excess Mg2Si.
KeyWords:hardness;tensile properties;microstructure ;
目录
1 前言 1
1.1.1改进6063铝合金性能的方法 1
(1) 稀土及稀土添稀加剂 1
(2)过剩硅 2
(3) 合金化 3
(4) 纳米添加剂 5
1.1.2 总结 6
1.2 研究的目的与意义 6
2 实验研究方法 7
2.1 实验原理 7
2.2 实验使用的设备及原材料 7
2.3 实验装置 8
2.4 实验过程及实验步骤 10
2.4.1 实验过程 10
2.4.2 实验步骤 10
3 实验结果及分析讨论 13
3.1 不同试样的化学成分及试样条件 13
3.1.1 不同试样的化学成分 13