半连续铸造AlCu/Al梯度合金的高温退火研究  

High Temperature Annealing of AlCu/Al Gradient Alloy Prepared by Semi-Continuous Casting

作　　者：张卫文[1] 李元元[1] 温利平[1] 张文[1] 

机构地区：[1]华南理工大学机电工程系,广州510640

出　　处：《金属热处理》2002年第5期6-8,共3页Heat Treatment of Metals

基　　金：国家自然科学基金 (5990 50 0 7);广东省自然科学基金(9942 50 )

摘　　要：采用双流浇注半连续铸造方法获得了AlCu/Al梯度合金。研究了合金高温退火处理后的组织和性能变化。结果表明 ,高温退火后合金的洛氏硬度比铸态时显著降低但仍保持明显的梯度分布 ,并且在铸件横截面中心位置硬度降低幅度小 ,靠铸件表面区域降低幅度大。高温退火处理后 ,AlCu/Al梯度合金仍能保持宏观上铜含量的梯度分布与铸态时无明显的差别。A novel AlCu/Al gradient material was fabricated by semi-continuous casting using double-stream-pouring technique.The microstructures and property of the alloy annealed at high temperature were investigated.The results show that the Rockwell hardness decreases remarkably and the gradient distribution of the hardness value in cross section maintains after high temperature annealing.On the contrary,the copper distribution of the alloy annealed at high temperature for a long time has no obvious change from that of the alloy in as-cast state.

关 键 词：半连续铸造 AlCu/Al梯度合金 高温退火 

分 类 号：TG156.25[金属学及工艺—热处理]