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公开(公告)号：EP3103891A4
公开(公告)日：2017-10-11
申请号：EP15746150
申请日：2015-02-06
发明人： HIRAKAMI DAISUKE , OKONOGI MAKOTO
CPC分类号： C21D9/52 , B60C9/00 , B60C9/0007 , C21D8/06 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32 , D02G3/48 , D07B1/066 , D07B2201/2014 , D07B2205/3035 , D07B2205/3053 , D07B2205/3057 , D07B2801/10
摘要： A steel wire according to an aspect of the present invention includes a predetermined chemical composition, in which a wire diameter R of the steel wire is 1.0 mm to 3.5 mm, a soft portion is formed along an outer circumference of the steel wire, the Vickers hardness of the soft portion is lower than that of a position of the steel wire at a depth of 1/4 of the wire diameter R by Hv 30 or higher, the thickness of the soft portion is 5 µm to 0.1 xR mm, the metallographic structure of a center portion of the steel wire contains 95% to 100% of pearlite by area%, the average lamellar spacing of pearlite in a portion from a surface of the steel wire to a depth of 5 µm is less than that of pearlite at the center of the steel wire, the difference between the average lamellar spacing of pearlite in the portion from the surface of the steel wire to the depth of 5 µm and the average lamellar spacing of pearlite at the center of the steel wire is 3 nm to 60 nm, and the tensile strength is 1100 MPa or higher.
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公开(公告)号：EP3165626A4
公开(公告)日：2018-03-28
申请号：EP15830061
申请日：2015-08-03
发明人： OKONOGI MAKOTO , HIRAKAMI DAISUKE
CPC分类号： C22C38/04 , C21D8/06 , C21D8/065 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/02 , C22C38/54
摘要： Provided is a high-carbon steel wire rod with excellent wire drawability, containing predetermined chemical components and the balance: Fe and impurities. In a cross-section perpendicular to a longitudinal direction, an area fraction of pearlite is equal to or more than 95% and equal to or less than 100%, an average block size of the pearlite is 10 µm to 30 µm and standard deviation of block size is 20 µm or less, and when Ceq. = C (%) + Si (%)/24 + Mn (%)/6, a tensile strength is equal to or more than 760 × Ceq. + 255 MPa and equal to or less than 760 × Ceq. + 325 MPa, reduction of area in a tensile test is -65 × Ceq. + 96 (%) or more, and standard deviation of the reduction of area is 6% or less.
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公开(公告)号：EP3144404A4
公开(公告)日：2018-01-17
申请号：EP15782916
申请日：2015-04-23
发明人： HIRAKAMI DAISUKE , OKONOGI MAKOTO
CPC分类号： C21D9/525 , B60C9/0007 , C21D8/06 , C21D8/065 , C21D9/52 , C21D2211/003 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32 , C23C30/005 , C23G1/00
摘要： A filament for a high strength steel cord has a wire diameter R of 0.1 mm to 0.4 mm, and includes, in a chemical composition, by mass%: C: 0.70% to 1.20%; Si: 0.15% to 0.60%; Mn: 0.10% to 1.00%; N: 0.0010% to 0.0050%; Al: more than 0% and 0.0100% or less; and a remainder of Fe and impurities, in which a surface part and a central part are included, a thickness of the surface part is 0.01 × R to 0.10 × R, the central part includes a pearlite structure in a proportion of 95% to 100% by area%, a C content of the surface part is 40% to 95% of a C content of the central part, and a ratio of a thickness of a lamellar cementite at a center of the thickness of the surface part to a thickness of a lamellar cementite in the central part is 95% or less, whereby high strength and workability can be achieved and cracking or the like caused by a delamination phenomenon can be prevented.
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公开(公告)号：EP3135786A4
公开(公告)日：2017-10-04
申请号：EP15783324
申请日：2015-04-23
发明人： HIRAKAMI DAISUKE , OKONOGI MAKOTO
IPC分类号： C22C38/00 , C21D8/06 , C21D9/52 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32
CPC分类号： C21D9/52 , C21D8/06 , C21D8/065 , C21D2211/003 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32
摘要： A wire rod for a steel cord has a wire diameter R of 3.5 mm to 8.0 mm, and includes, in a chemical composition, by mass%: C: 0.70% to 1.20%; Si: 0.15% to 0.60%; Mn: 0.10% to 1.00%; N: 0.0010% to 0.0050%; Al: more than 0% and 0.0100% or less; and a remainder of Fe and impurities, in which a surface part and a central part are included, a thickness of the surface part is 50 µm to 0.20 × R, the central part includes a pearlite structure in a proportion of 95% to 100% by area%, a C content of the surface part is 40% to 95% of a C content of the central part, and a ratio of a thickness of a lamellar cementite at a center of the thickness of the surface part to a thickness of a lamellar cementite in the central part is 95% or less, whereby high strength and workability can be achieved even after a finish drawing process and cracking or the like caused by a delamination phenomenon can be prevented.
摘要翻译： 钢丝帘线用线材的线径R为3.5〜8.0mm，化学成分中以质量％计含有C：0.70〜1.20％; Si：0.15％至0.60％; Mn：0.10〜1.00％。 N：0.0010％〜0.0050％ Al：大于0％且0.0100％以下; 剩余的Fe和杂质，其中包含表面部分和中心部分，表面部分的厚度为50μm至0.20×R，中心部分包括95％至100％的珠光体组织， 以面积％计，所述表面部分的C含量为所述中心部分的C含量的40％至95％，并且所述表面部分的厚度的中心处的层状渗碳体的厚度与所述表面部分的厚度之比 中央部的层状渗碳体为95％以下，即使经过精加工拉丝加工，也能够实现高强度和加工性，并且能够防止由分层现象引起的裂纹等。
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公开(公告)号：EP3103890A4
公开(公告)日：2017-07-26
申请号：EP15746084
申请日：2015-02-06
发明人： HIRAKAMI DAISUKE , OKONOGI MAKOTO
IPC分类号： C22C38/00 , B60C9/00 , B65G15/36 , C21D8/06 , C21D9/52 , C21D9/573 , C21D9/64 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/32
CPC分类号： C21D9/525 , B60C9/00 , B60C9/0007 , B65G15/36 , C21D8/06 , C21D8/065 , C21D9/5732 , C21D9/64 , C21D2201/03 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32
摘要： A filament according to an aspect of the present invention includes a predetermined chemical composition, in which a diameter r of the filament is 0.15 mm to 0.35 mm, a soft portion is formed along an outer circumference of the filament, the Vickers hardness of the soft portion is lower than that of a position of the filament at a depth of 1/4 of the diameter r by Hv 50 or higher, the thickness of the soft portion is 1 µm to 0.1×r mm, the metallographic structure of a center portion of the filament contains 95% to 100% of pearlite by area%, the average lamellar spacing of pearlite in a portion from a surface of the filament to a depth of 1 µm is less than that of pearlite at the center of the filament, the difference between the average lamellar spacing of pearlite in the portion from the surface of the filament to the depth of 1 µm and the average lamellar spacing of pearlite at the center of the filament is 2.0 nm or less, and the tensile strength is 3200 MPa or higher.
摘要翻译： 根据本发明的一个方面的长丝包括预定的化学组成，其中长丝的直径r为0.15mm至0.35mm，沿着长丝的外周形成柔软部分，软质的维氏硬度 比直径r的1/4深度处的丝的位置低Hv50或更高，软部的厚度为1μm至0.1×rmm，中心部分的金相组织 的细丝含有面积百分率为95％〜100％的珠光体时，从细丝表面至深度1μm的部分的珠光体的平均片层间距小于细丝中心的珠光体的平均片层间距， 从长丝表面至深度1μm的部分的珠光体的平均片层间距与长丝中心的珠光体的平均片层间距之差为2.0nm以下，并且抗拉强度为3200MPa或 更高。
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公开(公告)号：EP3015563A4
公开(公告)日：2017-03-08
申请号：EP14818358
申请日：2014-06-23
发明人： OKONOGI MAKOTO , HIRAKAMI DAISUKE
IPC分类号： C22C38/00 , C21D6/00 , C21D7/13 , C21D8/06 , C21D9/52 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/18 , C22C38/54
CPC分类号： C21D9/525 , C21D6/004 , C21D6/005 , C21D6/008 , C21D7/13 , C21D8/06 , C21D8/065 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/18 , C22C38/54
摘要： A high carbon steel wire rod includes required amounts of chemical components and a remainder including Fe and impurities; in which the area ratio of pearlite in a cross section perpendicular to a longitudinal direction is 95% or more and a remainder includes a non-pearlite structure which includes one or more of a bainite, a degenerate pearlite, a proeutectoid ferrite and a proeutectoid cementite; the average block size of the pearlite is 15 µm to 35 µm and the area ratio of the pearlite having a block size of 50 µm or more is 20% or less; and the area ratio of a region where a lamellar spacing of the pearlite is 150 nm or less is 20% or less in a region within a depth from a surface of the high carbon steel wire rod of 1 mm or less.
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