稀土微合金化对热管用无氧铜管坯成分及组织的影响  

Effects of Microalloying with Rare Earth on Composition and Microstructure of Oxygen-free Copper Tube Blank for Heat Pipe

作　　者：陈岩 陈进方[4] 汤晓水 余琪 王松伟 张士宏 曾延琦 CHEN Yan;CHEN Jin-fang;TANG Xiao-shui;YU Qi;WANG Song-wei;ZHANG Shi-hong;ZENG Yan-qi(Jiangxi Copper Co.,Ltd.,Nanchang 330096,China;Jiangxi Copper Technology Research Academy Co.,Ltd.,Nanchang 330096,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;JCC Processing Business Division,Nanchang 330096,China)

机构地区：[1]江西铜业集团有限公司,南昌330096 [2]江西铜业技术研究院有限公司,南昌330096 [3]中国科学院金属研究所,沈阳110016 [4]江西铜业加工事业部,南昌330096

出　　处：《精密成形工程》2020年第6期130-135,共6页Journal of Netshape Forming Engineering

基　　金：中国博士后科学基金(2019M662276);中国科学院科技服务网络计划区域重点资助项目(KFJ-STS-QYZD-145)。

摘　　要：目的解决连铸连轧无氧铜管坯成分与组织控制问题。方法通过稀土净化除杂与微合金化作用,对无氧铜熔铸成分控制、水平连铸和行星轧制工艺开展深入研究。结果稀土添加后铸坯中P的质量分数由添加前0.0095%降低至0.00145%~0.00182%,降低了80.8%;O的质量分数由0.0045%降低至0.0013%~0.00183%,降低了59.3%;铸坯晶粒尺寸由稀土添加前的2200μm细化到到650μm,细化了70.4%;三辊行星组织轴向平均晶粒为16μm,周向平均晶粒为21μm。结论稀土微合金化能够有效控制热管用无氧铜铸坯的成分;稀土微合金化明显细化了铸坯的晶粒组织,使无氧铜轧制变形组织更加均匀。The work aims to solve the problems on controlling composition and microstructure of oxygen-free copper tubes by continuous casting and rolling.The controlling of cast composition,horizontal continuous casting and planetary rolling process of oxygen-free copper tube were studied in-depth by purification and microalloying with rare earth.The results showed that the mass fraction of P and O in the casting blank added with rare earth was reduced from 0.0095%to 0.00145%-0.00182%by 80.8%and from 0.0045%to 0.0013%-0.00183%by 59.3%respectively.Moreover,the grain size of cashing blank added with rare earth was refined from 2200μm to 650μm by 70.4%.The axial average grain size of the three-roller planetary structure was 16μm and the circumferential average grain size was 21μm.The microalloying with rare earth can effectively control the composition of the oxygen-free copper for heat pipe.It apparently refines the grain size structure and makes the deformation microstructure of oxygen-free copper rolling more uniform.

关 键 词：热管 稀土 无氧铜 成分 组织 

分 类 号：TG146.4+54[一般工业技术—材料科学与工程]