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公开(公告)号：US20240344186A1
公开(公告)日：2024-10-17
申请号：US18294342
申请日：2022-03-30
发明人： Hiromu IZUMIDA , Tetsuya NAKAJIMA , Hiroto KONTANI
CPC分类号： C22C38/34 , C21D1/18 , C21D1/74 , C21D6/002 , C21D6/005 , C21D6/008 , C21D9/525 , C22C38/02 , C22C38/04 , C22C38/24 , C21D2211/008
摘要： A steel wire for springs includes a main steel body and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains between 0.6 and 0.7 mass % C, between 1.7 and 2.5 mass % Si, between 0.2 and 1 mass % Mn, between 0.6 and 2 mass % Cr, and between 0.08 and 0.25 mass % V, with the balance consisting of Fe and unavoidable impurities. The steel constituting the main body has a tempered martensitic structure. The oxidized layer includes a high Si concentration layer having a maximum concentration of Si of not less than 2.5 times and not more than 5.5 times that of the main body. The main body includes an intergranular oxidized layer arranged to constitute the outer peripheral surface and having a thickness of not less than 0.5 μm and not more than 2.5 μm.
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公开(公告)号：US20220307115A1
公开(公告)日：2022-09-29
申请号：US17048051
申请日：2020-04-07
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.
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公开(公告)号：US20220186349A1
公开(公告)日：2022-06-16
申请号：US17058459
申请日：2020-06-17
发明人： Hiromu IZUMIDA , Tetsuya NAKAJIMA
摘要： A spring steel wire includes a main body made of a steel and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains not less than 0.62 mass % and not more than 0.68 mass % C, not less than 1.6 mass % and not more than 2 mass % Si, not less than 0.2 mass % and not more than 0.5 mass % Mn, not less than 1.7 mass % and not more than 2 mass % Cr, and not less than 0.15 mass % and not more than 0.25 mass % V, with the balance being Fe and unavoidable impurities. A value obtained by dividing a sum of a Si content and a Mn content by a Cr content is not less than 0.9 and not more than 1.4. The steel constituting the main body has a tempered martensite structure.
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公开(公告)号：US20200080166A1
公开(公告)日：2020-03-12
申请号：US16616360
申请日：2018-03-13
发明人： Takumi AKADA , Hiromu IZUMIDA
摘要： A canted coil spring includes a core wire 10 formed of steel having a pearlite structure; and a copper plating layer 20 formed of copper or a copper alloy and covering an outer circumferential surface 11 of the core wire 10. The steel contains 0.5 mass % or more and 1.0 mass % or less carbon, 0.1 mass % or more and 2.5 mass % or less silicon, and 0.3 mass % or more and 0.9 mass % or less manganese, with the balance being iron and inevitable impurities. The copper plating layer 20 has a crystallite size of 220±50 Å.
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公开(公告)号：US20220186803A1
公开(公告)日：2022-06-16
申请号：US17058282
申请日：2020-06-15
发明人： Hiromu IZUMIDA , Yoshiki NATSUMEDA , Taichi OKADA
摘要： A spring steel wire includes a main body made of a steel and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains not less than 0.5 mass % and not more than 0.7 mass % C, not less than 1 mass % and not more than 2.5 mass % Si, not less than 0.2 mass % and not more than 1 mass % Mn, and not less than 0.5 mass % and not more than 2 mass % Cr, with the balance being Fe and unavoidable impurities. The steel constituting the main body has a pearlite structure. The oxidized layer has a thickness of not less than 2 μm and not more than 5 μm. The oxidized layer contains not less than 60 mass % Fe3O4.
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6.发明申请公开(公告)号：US20190154096A1
公开(公告)日：2019-05-23
申请号：US16308674
申请日：2017-04-10
发明人： Hiromu IZUMIDA
IPC分类号： F16F1/04 , C22C38/46 , C22C38/22 , C22C38/04 , C22C38/02 , C21D9/52 , C21D6/00 , C23C30/00 , B21F35/00 , F16F1/02
摘要： A wire material for a canted coil spring 1 includes a core wire 10 made of steel with a pearlite structure and a plating layer 20 covering a surface 11 of the core wire 10 and made of copper or a copper alloy. The steel constituting the core wire 10 contains 0.5% to 1.0% by mass of carbon, 0.1% to 2.5% by mass of silicon, and 0.3% to 0.9% by mass of manganese, with the balance being iron and unavoidable impurities.
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7.发明申请ELECTRODE WIRE FOR WIRE ELECTRIC DISCHARGE MACHINING, AND METHOD FOR PRODUCING SAME 有权用于电力放电加工的电极线及其制造方法公开(公告)号：US20150360309A1
公开(公告)日：2015-12-17
申请号：US14764956
申请日：2014-09-02
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。
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公开(公告)号：US20240209481A1
公开(公告)日：2024-06-27
申请号：US17802486
申请日：2002-02-03
CPC分类号： C22C38/02 , C21D8/065 , C21D9/02 , C22C38/04 , C22C38/18 , C21D2211/005 , C21D2211/009
摘要： A steel wire is composed of a steel containing: not less than 0.5 mass % and not more than 0.7 mass % carbon, not less than 1 mass % and not more than 2.5 mass % silicon, not less than 0.3 mass % and not more than 1 mass % manganese, and not less than 0.5 mass % and not more than 2 mass % chromium, with the balance being iron and unavoidable impurities. The steel wire has a wire diameter of not less than 0.5 mm and not more than 2 mm, and a tensile strength of not less than 2000 N/mm2 and not more than 2700 N/mm2. The steel has a pearlite structure. A value obtained by dividing a sum of 5.8885×10−3 and a lattice strain S of the steel by the tensile strength T, (S+5.8885×10−3)/T, the tensile strength T being in N/mm2, is not less than 4.8×10−6.
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公开(公告)号：US20210079505A1
公开(公告)日：2021-03-18
申请号：US16965420
申请日：2018-10-22
发明人： Takumi AKADA , Hiromu IZUMIDA
摘要： A copper-coated steel wire includes: a core wire made of steel having a pearlite structure; and a coating layer covering a surface of the core wire and made of Cu or a Cu alloy. The steel contains C by greater than or equal to 0.5% by mass and less than or equal to 1.0% by mass, Si by greater than or equal to 0.1% by mass and less than or equal to 2.5% by mass, Mn by greater than or equal to 0.3% by mass and less than or equal to 0.9% by mass, and the balance consisting of Fe and inevitable impurities. In a cross section perpendicular to a longitudinal direction, a value of surface roughness Ra of the core wire is greater than or equal to 25% and less than or equal to 70% of a thickness of the coating layer.
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公开(公告)号：US20200056671A1
公开(公告)日：2020-02-20
申请号：US16492895
申请日：2017-12-04
发明人： Takumi AKADA , Hiromu IZUMIDA , Akihisa HOSOE
摘要： A wire material for a canted coil spring includes a core wire composed of a steel having a pearlite structure, a copper plating layer covering the outer peripheral surface of the core wire, the copper plating layer being composed of copper or a copper alloy, and a hard layer disposed adjacent to the outer periphery of the copper plating layer, the hard layer having a higher hardness than the copper plating layer. The steel constituting the core wire contains 0.5% or more by mass and 1.0% or less by mass carbon, 0.1% or more by mass and 2.5% or less by mass silicon, and 0.3% or more by mass and 0.9% or less by mass manganese, the balance being iron and unavoidable impurities.
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