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溶液温度对AlSi37Cu0.7Mg0.9Ni0.2合金的微观结构和性能的影响,该合金是通过快速固化和热挤出制备的

Xiaodong Mao^1,2,3, Zhenning Chen³, Ningjie Gu³

¹State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China.

Materials (Basel, Switzerland)

|November 27, 2025

概括

溶液温度显著影响AlSi37Cu0.7Mg0.9Ni0.2合金的性能. 较高的温度增加了硬度,但降低了柔性,而耐腐蚀性则随微观结构变化而变化.

科学领域:

材料科学材料科学材料科学
金工业是金工业的一个方面.
腐蚀科学腐蚀科学

背景情况:

快速固化和热挤压的AlSi37Cu0.7Mg0.9Ni0.2合金棒用于结构应用.
了解溶液温度对合金性能的影响对于优化其性能至关重要.

研究的目的:

系统地研究溶液温度 (460-560°C) 对AlSi37Cu0.7Mg0.9Ni0.2合金的微观结构,机械性能和腐蚀行为的影响.
为定制合金性能建立一个全面的工艺结构属性关系.

主要方法:

通过快速固化和热挤出来制备合金棒.
溶液温度从460°C到560°C的系统变化.
微观结构 (颗粒大小,沉),机械性能 (硬度,可塑性),电导率和腐蚀行为 (阳极氧化,电化学分析) 的表征.

主要成果:

溶液温度受到重结晶,沉动力学和相位分布的批判性控制.
溶液温度升高导致谷物粗化 (4.51微米至13.25微米),增强了沉硬化,硬度增加了108.8%,但柔性从2.5%降低到1.0%.
电导率最初有所改善,但在更高的温度下恶化;耐腐蚀性显示出非单调的趋势,在480°C时最大减重,在560°C时部分恢复.

结论:

通过精细的β′′-Mg2Si, θ'-Al2Cu沉物和稳定的Al3Ni相实现了最佳的机械性能.
该研究确定了AlSi37Cu0.7Mg0.9Ni0.2合金的关键过程结构性质关系.
这些发现为通过可控溶液处理来定制合金在结构功能应用中的性能提供了指导.

关键词:

这是一种AlSi37Cu0.7Mg0.9Ni0.2合金.无氧化是一种无氧化.机械性能机械性能机械性能解决方案的温度解决方案的温度

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