摘要
通过调整合金成分分别配制了添加Zr,AlTiB ,AlTiC和RE的AK4 1ч实验铝合金 ,经过 2种不同的工艺生产棒材 ,在室温下测量其淬火时效态抗拉强度 ,用金相显微镜和扫描电镜观察和分析了合金在不同加工工艺状态下的显微组织和结构 ,并判定其晶粒度 .结果表明 :在设计合金成分时 ,要精确控制Cu的含量在 2 .0 %～ 2 .6 % ,以免生成难溶的含Cu相 ,降低合金的强度 ;多向强应变可细化晶粒 ,提高合金的力学性能 ;随变形程度的增加 ,晶粒尺寸减小 ;制定挤压工艺时 ,为避免产生周期性裂纹 ,建议挤压比取为 2
Al Cu Mg Fe Ni alloys with addition of Zr, AlTiB, AlTiC and RE were prepared by adjusting the component of the alloys. Rods were produced through two different processes. The mechanical properties of this material after being quenched and aged were tested at ambient temperature. The microstructures of the alloys in different conditions were observed by optical microscope and SEM, and also the grains size was measured. The results show that during the design the component of the alloys, the content of Cu must be controlled accurately between 2.0%～2.6%, and m (Fe)∶ m (Ni) should be 1∶1, lest the strength of the alloys be reduced and indissoluble Cu included phase appear. Multiaxial strain could refine the grains and improve the properties of the alloys; the grains size would be decreased by increasing the strain, and the periodic crack would be prevented by limiting the extrusion temperature and the extrusion ratio.
出处
《中南工业大学学报》
CSCD
北大核心
2001年第2期184-188,共5页
Journal of Central South University of Technology(Natural Science)
