铜包铝气压连铸成形工艺  

Preparation of Copper Cladding Aluminum Wire by Continuous Casting with Air Pressure

作　　者：臧勃林[1] 赵永龙[1] 梁贺[1] 吴春京[1] 

机构地区：[1]北京科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2011年第5期447-449,389-390,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50774009);国家高技术研究发展计划(863计划)资助项目(2009AA03Z532)

摘　　要：在自制的铜包铝气压连铸成形设备上,成功地连铸出内径为8mm,铜层厚度为2mm的小尺寸铜包铝双金属连铸复合棒坯。复合棒坯连续稳定,表面质量良好。经扫描电镜观察和剪切强度测试,发现铜包覆层厚度均匀,内部铜铝界面形成具有一定厚度的扩散边界,内外层金属实现了有效结合。经过后续拉拔加工,成功制备出外径为0.95mm的铜包铝复合线材,经测试,其退火后的抗拉强度,伸长率和电阻率分别为208.43MPa,13.44%,2.454×10-6Ω·cm。Copper cladding aluminum rod with 8 mm in inner diameter and 2 mm in copper layer thickness were successfully made on the self-designed equipment for copper cladding aluminum continuous casting with air pressure.Composite rods exhibit good surface quality and stable continuous casting process.SEM(scanning electron microscope) observation and shearing strength testing were conducted.The results show that copper cladding aluminum rod has uniform thickness,and copper-aluminum interface in the inner exhibits diffusion interface with some thickness,realizing effective bonding of inner and outer metal.Copper cladding aluminum wire with 0.95 mm in diameter is made through the subsequent drawing process.And the wire exhibits good performance in mechanical properties and electrical performance.

关 键 词：连铸 气体冲压连铸 铜包铝 线材 

分 类 号：TG249.7[金属学及工艺—铸造]