摘要
研究了铁、镍含量对 2 6 18合金挤压前后及挤压加淬火时效后组织与性能的影响。结果表明 ,当铁、镍含量分别增加至 1.4 %和 1.4 5 %时 ,铸态组织中出现了粗大的针片状Al9FeNi相 ,挤压后破碎为粗大颗粒相 ;增加铁、镍含量对合金时效后的晶粒度没有影响 ,且降低 2 6 18合金的室温力学性能 ,但能提高合金 30 0℃强度。
Effect of iron and nickel on microstructure of 2618 aluminum alloy before and after extrusion was investigated. The results show that when the contents of iron and nickel rise to 1.4% and 1.45% respectively, the casting microstructure contains large needle and flake Al 9FeNi phase, thus becoming big grain Al 9FeNi phase after extrusion. Increasing the contents of iron and nickel has little effect on the grain size of 2618 alloy after aging and decreases the room temperature mechanical properties of 2618 alloy, but improves elevated temperature properties.
出处
《机械工程材料》
CAS
CSCD
北大核心
2001年第12期8-9,16,共3页
Materials For Mechanical Engineering
基金
国家"973"重点资助项目 (G19990 6 490 9)
关键词
铝合金
挤压
显微组织
力学性能
铁
镍
aluminum alloy
extrusion
microstructure
mechanical property
