公开(公告)号：EP2390886A4

公开(公告)日：2018-03-28

申请号：EP09838599

申请日：2009-05-21

申请人： NINGXIA ORIENT TANTALUM IND CO LTD

发明人： ZHAO BING ,  DU LINGHUI ,  XIE YONGXU ,  WAN QINGFENG ,  WANG HUIFENG ,  QIU GUOHUA

IPC分类号： H01G9/012 ,  B21C23/00 ,  B21C37/04 ,  B22F5/12 ,  H01G9/00 ,  H01G9/048 ,  H01G9/052

CPC分类号： H01G9/0029 ,  B21C23/002 ,  B21C37/047 ,  B22F3/24 ,  B22F5/12 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/045 ,  H01G9/012 ,  H01G9/048 ,  H01G9/052 ,  H05K2201/1081 ,  Y10T29/49204 ,  B22F3/02 ,  B22F2003/248 ,  B22F3/18 ,  B22F2201/03

摘要： The present invention relates to a tantalum wire for anode lead of tantalum capacitors, characterized in that the cross section of the tantalum wire is approximate rectangular or regular rectangular. The present invention also relates to a process for manufacturing the tantalum wire, comprising the steps of: providing feedstock tantalum wire; subjecting the feedstock tantalum wire to heat treatment; subjecting the heat treated tantalum wire to surface pretreatment to form an oxide membrane on the surface-pretreated tantalum wire; rolling the surface-pretreated tantalum wire by lubricating with lubricant oil to make the cross section of the rolled tantalum wire being approximate rectangular or regular rectangular; subjecting the tantalum wire to final annealing.