铸造2024，Vol.73Issue(8)：1103-1108,6.
固溶处理时间对铸造Al-Si-Mg合金低温力学性能的影响
Effects of Solution Treatment Time on Mechanical Properties of Cast Al-Si-Mg Alloy at Low Temperature
摘要
Abstract
The low temperature tensile test of cast Al-7Si-0.3Mg alloy was carried out.The effect of solid solution time on the mechanical properties and microstructures of Al-7Si-0.3Mg alloy at 20 ℃,-20 ℃ and-60 ℃was investigated,and the effect of Si on the fracture behavior and its mechanism were analyzed.The results showed that with prolonging in the solution time,the yield strengths,tensile strengths and elongations of the alloys at 20 ℃,-20 ℃ and-60 ℃ increased firstly and then decreased,and the maximum value could be obtained with the solution time of 10 h.With prolonging in the solution time,the size of Si phase and the ratio of length to width decreased.When the solid solution time was 10 h,the smaller Si phase in the alloy exhibited mainly granular shape,and with increasing the solution time to 15 h the size and length-width ratio of Si phase were increased.With the decrease of the test temperature,the number of slip bands near the Si phase showed a decreasing trend,and there were more fracture Si phases near the fracture surface at low temperature.Fracture Si exhibited the smaller cracks when the solid solution time was 10 h,the fracture is dominated by small cleavage plan and dimple.The toughness was better than that of ones without solution.关键词
Al-7Si-0.3Mg合金/固溶处理/Si相/低温拉伸Key words
Al-7Si-0.3Mg alloy/solution treatment/Si phase/low temperature tensile分类
矿业与冶金引用本文复制引用
马广辉,李广龙,崔勇,刘海,金玉静..固溶处理时间对铸造Al-Si-Mg合金低温力学性能的影响[J].铸造,2024,73(8):1103-1108,6.基金项目
江苏省高等学校自然科学研究面上项目(21KJB430006) （21KJB430006）
江苏高校"青蓝工程"项目(202219QL001) （202219QL001）
苏州工业职业技术学院院级自科与社科培育项目(2022kypy07) （2022kypy07）
苏州工业职业技术学院科研启动项目(2019kyqd004). （2019kyqd004）
