交变磁场及铸造参数对铜管坯凝固组织和性能影响  

Effects of alternating magnetic field and casting parameters on solidification structure and mechanical properties of copper tube billets

作　　者：阎志明[1,2] 刘辉[3] 李廷举[1,2] 张小青[3] 曹志强[1] 张小立[1] 

机构地区：[1]大连理工大学材料科学与工程学院 [2]大连理工大学三束材料改性国家重点实验室 [3]佛山市华鸿铜管有限公司

出　　处：《特种铸造及有色合金》2008年第S1期99-102,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50274017)

摘　　要：探索了在水平连铸紫铜管坯工业生产线上施加工频交变磁场,考查了磁场强度及铸造参数对管坯凝固组织及力学性能的影响。结果表明,在交变磁场作用下,铜管坯的凝固组织及力学性能有了明显的改善,各向异性的柱状晶得到了显著的细化,均为细小均匀的粒状晶和等轴晶,当输入电流为50A,铸造速度为0.0042m/s,浇注温度为1150℃,冷却水为1m3/h时,管坯的抗拉强度提高了15.9%,伸长率提高了63.8%。Alternating magnetic field of commercial frequency was used in industrial product line of horizontal continuous casting copper tube billets. The effects of input current intensity of alternating magnetic field and casting parameters were studied to obtain good quality production. The results show that the formerly unhomogeneous columnar grain structure get into homogeneous equiaxed grain structure with the application of alternating magnetic field. When the input current intensity is 50 A, casting speed is ...

关 键 词：交变磁场 铜管坯 凝固组织 

分 类 号：TG249.7[金属学及工艺—铸造]