公开(公告)号：EP3133048A4

公开(公告)日：2017-12-27

申请号：EP15779903

申请日：2015-04-01

申请人： TOYO TANSO CO

发明人： KANDA MASAO ,  OHTA NAOTO ,  SAITO KIYOSHI ,  OKADA MASAKI ,  ONISHI MOTOKI ,  NAMIKI TAKEYUKI

IPC分类号： C01B32/23 ,  B23H1/06 ,  B23H9/00 ,  C04B41/88

CPC分类号： B23H1/06 ,  B23H9/006 ,  C04B41/009 ,  C04B41/5127 ,  C04B41/5384 ,  C04B41/88 ,  C04B2111/00844 ,  C04B2111/94 ,  C04B35/522 ,  C04B38/00 ,  C04B41/4521 ,  C04B41/4523

摘要： An object is to provide a graphite-copper composite electrode material that is capable of reducing electrode wear to a practically usable level and to provide an electrical discharge machining electrode using the material. A graphite-copper composite electrode material includes a substrate comprising a graphite material and having pores, and copper impregnated in the pores of the substrate, the electrode material having an electrical resistivity of 2.5 µ©m or less, preferably 1.5 µ©m or less, more preferably 1.0 µ©m or less. It is desirable that the substrate comprising the graphite material have an anisotropy ratio of 1.2 or less. It is desirable that an impregnation rate Õ of the copper in the electrode material is 13% or greater. It is desirable that the substrate comprising the graphite material have a bulk density of from 1.40 Mg/m 3 to 1.85 Mg/m 3 .