高比强胞状铝合金耐火性能的研究  

A Study on the Fire Retardance Properties of Cellular Aluminum Alloy

作　　者：李杰锋[1] 何德坪[1] 余焜[1] 

机构地区：[1]东南大学材料科学与工程系,江苏南京210096

出　　处：《应用科学学报》2004年第3期375-379,共5页Journal of Applied Sciences

基　　金：国家自然科学基金重点资助项目(50231010);空天飞行器若干重大基础问题项目(90205005);国家自然科学基金资助项目(50051002;19982001)

摘　　要：采用耐火极限这个指标来衡量胞状铝合金的耐火性能,用有限元分析方法计算了温度场及耐火极限.胞状铝合金具有很好的耐热性能,以略高于铝合金熔点的温度660°C加热时,厚为26mm、孔隙率为76%的胞状铝合金的耐火极限为无限长,且形状不发生变化;要使胞状铝合金的背面温度达到熔点,必须提高加热温度.胞状铝合金在高于710°C的温度下加热,其体积发生收缩,且收缩率随温度升高而增大.Fire retardance limit is used to evaluate the fire retardance properties of cellular aluminum alloy. The temperature field and fire retardance limit are solved by finite element analysis. Cellular aluminum alloy has outstanding heat resistance properties. At the temperature of 660(°C)(a few degrees above the melting point), the fire retardance limit of a 26 mm thick plate made of cellular aluminum alloy with 76% porosity, is increased to infinity, and its shape does not change. In order to allow the temperature of unexposed surface to reach the melting point, the heating temperature would have to be raised. When the cellular aluminum alloy is heated above 710(°C), volume shrinkage occurs and the ratio of volume shrinkage increases with the temperature.

关 键 词：胞状铝合金 耐火性能 温度场 有限元分析 评价准则 

分 类 号：TG146.21[一般工业技术—材料科学与工程]