公开(公告)号：US20220307115A1

公开(公告)日：2022-09-29

申请号：US17048051

申请日：2020-04-07

申请人： Sumitomo Electric Industries, Ltd.

发明人： Tetsuya NAKAJIMA ,  Fuminori OKADA ,  Kazuaki SUGIMURA ,  Hiromu IZUMIDA ,  Katsutoshi IWAMOTO

IPC分类号： C22C38/24 ,  C22C38/04 ,  C22C38/02 ,  C21D9/02 ,  C21D1/06 ,  C23C8/26 ,  C21D9/52 ,  F16F1/02

摘要： A steel wire is formed of a steel containing: not less than 0.6 mass % and not more than 0.7 mass % carbon, not less than 1.2 mass % and not more than 2.1 mass % silicon, not less than 0.2 mass % and not more than 0.6 mass % manganese, not less than 1.4 mass % and not more than 2 mass % chromium, and not less than 0.15 mass % and not more than 0.3 mass % vanadium, with the balance being iron and unavoidable impurities. The steel includes a matrix made up of tempered martensite, and a non-metallic inclusion present in the matrix. When √area of the non-metallic inclusion is represented as H1 and √area of a region including both the non-metallic inclusion and a decreased-hardness portion is represented as H2, a ratio of H2 to H1, or, H2/H1 is at least 1 and less than 1.3.

公开(公告)号：US20150360309A1

公开(公告)日：2015-12-17

申请号：US14764956

申请日：2014-09-02

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. ,  SUMITOMO (SEI) STEEL WIRE CORP.

发明人： Kazuaki SUGIMURA ,  Hiromu IZUMIDA ,  Kenichi SHIMIZU ,  Shinei TAKAMURA ,  Katsutoshi IWAMOTO

IPC分类号： B23H7/24 ,  B21C1/02 ,  C22C18/02

CPC分类号： B23H7/24 ,  B21C1/003 ,  B21C1/02 ,  B23H7/08 ,  C22C18/02 ,  C23C2/06 ,  C23C2/38

摘要： An object of the present invention is to improve machining speed by realizing both conductive properties and discharge performance with regard to an electrode wire for wire electric discharge machining, the electrode wire being obtained by plating a steel wire with a copper-zinc alloy. Another object is to suppress the occurrence of separation, cracking, and the like of plating in a wire-drawing step of an electrode wire. An electrode wire for wire electric discharge machining of the present invention includes a steel wire (11) serving as a core wire, and a plating layer (12) that covers the steel wire and that is composed of a copper-zinc alloy, in which an average zinc concentration of the plating layer is 60% to 75% by mass, a conductivity of the plating layer is 10% to 20% IACS, and a wire diameter is 30 to 200 μm.

摘要翻译： 本发明的目的是通过实现用于线材放电加工的电极线的导电性能和放电性能两者来提高加工速度，该电极线通过用铜 - 锌合金电镀钢丝而获得。 另一个目的是在电极丝的拉丝步骤中抑制电镀的分离，开裂等的发生。 本发明的电线放电加工用电极线包括作为芯线的钢丝（11）和覆盖钢丝的由铜 - 锌合金构成的镀层（12），其中， 镀层的平均锌浓度为60〜75质量％，镀层的导电率为10％〜20％IACS，线径为30〜200μm。

公开(公告)号：US20190272931A1

公开(公告)日：2019-09-05

申请号：US16348423

申请日：2017-07-05

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Hiromu IZUMIDA ,  Akihisa HOSOE ,  Takumi AKADA ,  Shinei TAKAMURA ,  Katsutoshi IWAMOTO

IPC分类号： H01B7/00 ,  H01B13/012 ,  H01B1/02 ,  C22C38/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/00

摘要： A strand for a wiring harness includes a first element wire and a second element wire twisted around the first element wire and made of copper or a copper alloy. The first element wire includes a core portion made of stainless steel and a covering layer covering the core portion and made of copper or a copper alloy.