Al-Si-Cu合金低温力学性能的研究  

Study of the Mechanical Properties of Al-Si-Cu Alloy Under Low Temperature

作　　者：张洪坤 

机构地区：[1]攀钢集团西昌钢钒有限公司冷轧厂,四川西昌615012

出　　处：《四川冶金》2013年第5期51-58,共8页Sichuan Metallurgy

摘　　要：主要以Al-Si-Cu合金为研究对象,研究了低温变化对锶变质后的Al-Si-Cu合金组织及性能的影响。变质处理后的Al-Si-Cu合金的抗拉强度和屈服强度随温度的降低均升高,同时伸长率和断面收缩率随温度的降低也略有上升。通过对Al-Si-Cu合金金相观察,加入Sr元素后,合金的组织得到显著细化。变质后的Al-Si-Cu合金在低温下具有更好的力学性能。A1- Si -Cu alloy is the main subject investigated in this paper, and the influnces of low tem- perature on the microstructure and mechanical properties of A1 - Si - Cu alloy in Sr-modified states have been investigated. The ultimate tensile strength and yield strength of A1 - Si - Cu alloy in St-modified states increase with the decrease of temperature. And contraction of area and elongation percentage of A1 - Si - Cu alloy in Sr-modified states also increase as the temperature reduces. By means of observing the microstructure of A380 aluminum, with the addition of Sr element, the microstruetures of the alloys re- fined dramatically. The mechanical properties of A1 - Si - Cu alloy in St-modified states is better with the decrease of temperature.

关 键 词：Al-Si-Cu铝合金 锶变质 低温 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]