摘要
通过力学性能测试、显微组织及断口分析等方法,分别研究了Si、Cu元素的加入对Al-Mg-Si合金组织及性能的影响作用,并对其随后加工工艺进行了合理探讨。结果表明:随着Si、Cu元素的增加,晶粒逐渐减小,硬度值随之增大;在相同条件下,Cu元素对铸态合金强化效果要比Si元素的作用更为显著,其主要归因于更多强化相的形成促进了结晶形核过程。通过对不同加工工艺后合金性能的比较分析,在本实验条件下合金经固溶时效、冷轧、二次时效后具有较佳的综合力学性能,其抗拉强度、延伸率分别为392MPa、11.60%。
The effects of Si, Cu on microstrueture and property of AI - Mg - Si ＇alloy were studied, and then the processing technology was discussed reason- ably by mecha- -nics testing, microstructure and fracture analysis, etc. The results showed that grains decreased gradually and hardness value increased with the increasing of the contents of Si, Cu ; moreover Cu had a more notable enhanced effect on as - cast alloy than Si under the same conditions, which mainly contributed to more strengthening phase promoting crystallization. And mechanical properties of the ahoy by the different processing were compared, the alloy had better comprehensive mechanical properties after solid solution ageing, cold roiling, secondary aging in this experimental conditions, tensile strength and elongation of the alloy were 392 MPa and 11.6% respectively.
出处
《轻金属》
CSCD
北大核心
2012年第10期40-43,共4页
Light Metals
关键词
AL-MG-SI合金
时效
组织及性能
Al- Mg- Si alloy
aging
microstructure and mechanical property
