AL-10%Cr ,AL-20%Mn合金的固液混合铸造  

Al-10mass%Cr and Al-20mass%Mn Alloys Prepared with Mixed Solid-Liquid Casting Technology

作　　者：陈振华[1] 何建军[1] 刘劲松[2] 程相飞[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]长沙航空职业技术学院,湖南长沙410124

出　　处：《湖南大学学报（自然科学版）》2004年第5期13-17,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50274037)

摘　　要：高合金含量的Al Mn,Al Cr合金(质量分数大于10%)中Mn,Cr含量高,传统铸造组织十分粗大,力学性能很差,不能应用.本文采用固液混合铸造技术制备了Al 20%Mn,Al 10%Cr合金.实验结果表明,合金的显微组织明显细化,其平均晶粒尺寸都能控制在10μm以下,且晶粒呈球形或近球形,压铸材料的力学性能为:σb=100～110MPa,σ0.2=70～80MPa.随着粉末加入量的增加,合金晶粒逐渐细化.这两种合金可以应用为耐磨、耐蚀材料.Al-Mn and Al-Cr alloys with a high alloy content contains a lot of Mn and Cr over 10 mass%.They can not be used as structural materials due to their coarse microstructures and poor mechanic properties. In this paper, a new mixed semi-liquid casting technology was applied to prepare Al-20　mass%Mn and Al-10　mass%Cr alloys. The experimental results showed that the grain could be obviously refined throngh this new technology. The average grain size of the samples was under 10 μm with spherical and near-spherical shapes. The mechanic properties of the two alloys were improved to σb=100～110　MPa,and σ(0.2)=70～80　MPa.The more the alloy powders with the same composition added, The finer the grain of the alloy. The two alloys can be used as wear-resistant and corrosion-resistant materials.

关 键 词：铸造 AL-MN合金 AL-CR合金 固液混合铸造 

分 类 号：TG292[金属学及工艺—铸造]