公开(公告)号：US06800147B2

公开(公告)日：2004-10-05

申请号：US10226137

申请日：2002-08-23

申请人： Mamoru Nagao ,  Hiroshi Yaguchi ,  Kenji Ochiai ,  Nobuhiko Ibaraki ,  Takaaki Minamida ,  Noriaki Hiraga

发明人： Mamoru Nagao ,  Hiroshi Yaguchi ,  Kenji Ochiai ,  Nobuhiko Ibaraki ,  Takaaki Minamida ,  Noriaki Hiraga

IPC分类号： C22C3802

CPC分类号： C22C38/04 ,  B21C1/00 ,  B21C37/045 ,  C21D8/06 ,  C22C38/02 ,  D07B1/066 ,  D07B2205/3057 ,  Y10T428/12431 ,  D07B2801/10

摘要： Disclosed herein is a high-strength high-carbon steel wire which, owing to its high strength as well as good ductility, is excellent in resistance to strain aging embrittlement and longitudinal cracking. The steel wire is characterized by having a chemical composition (in mass %) including C: 0.75-1.20%, Si: 0.1-1.5%, Mn: 0.3-1.2%, P: no more than 0.02%, S: no more than 0.02%, Al: no more than 0.005%, and N: no more than 0.008%, with the remainder being Fe and inevitable impurities. The steel wire is further characterized by having worked pearlite structure containing lamellar cementite in amorphous form, a diameter (D) ranging from 0.15 to 0.4 mm, a metal lubricating film as the surface layer whose main phase is composed of at least one of Cu, Ni, and Zn or an alloy thereof, and tensile strength no lower than (3500×D−0.145) MPa and no higher than (3500×D−0.145+87×[C]−5) MPa, where [C] denotes C content in %.

摘要翻译： 本发明公开了一种高强度高碳钢丝，由于其强度高，延展性好，耐应变老化脆化和纵向裂纹性优异。钢丝的特征在于其化学成分（质量） ％），包括C：0.75-1.20％，Si：0.1-1.5％，Mn：0.3-1.2％，P：不大于0.02％，S：不大于0.02％，Al：不大于0.005％，N ：不超过0.008％，其余为Fe和不可避免的杂质。 该钢丝的特征还在于具有包含无定形的层状渗碳体，直径（D）为0.15〜0.4mm的金刚石润滑膜，其主相由Cu， Ni和Zn或其合金，拉伸强度不低于（3500×D <-0.145>）MPa，不高于（3500×D <-0.145> + 87×[C]≤5）MPa，其中[C]表示 C含量为％。

公开(公告)号：US06645319B2

公开(公告)日：2003-11-11

申请号：US09971700

申请日：2001-10-09

申请人： Mamoru Nagao ,  Kenji Ochiai ,  Nobuhiko Ibaraki ,  Takaaki Minamida ,  Hiroshi Yaguchi

发明人： Mamoru Nagao ,  Kenji Ochiai ,  Nobuhiko Ibaraki ,  Takaaki Minamida ,  Hiroshi Yaguchi

IPC分类号： C21D806

CPC分类号： C22C38/04 ,  C21D8/06 ,  C21D9/525 ,  C21D2211/009 ,  C22C38/02

摘要： A wire rod for drawing which is superior in drawability as well as twisting characteristics, and a method for producing the wire rod. The wire rod is characterized in that the raw material thereof is a eutectoid steel or hypereutectoid steel containing 0.1-2.0 mass % Si and 0.2-2.0 mass % Mn and the pearlite structure therein accounts for no less than 80 area % of microstructure and the maximum length of ferrite as the second phase therein is no larger than 10 &mgr;m. The wire rod is produced by drawing with a true strain of 1.5 or above and subjecting the wire rod to patenting at a heating temperature defined by a specific equation.

公开(公告)号：US06322641B1

公开(公告)日：2001-11-27

申请号：US09520657

申请日：2000-03-07

申请人： Koichi Makii ,  Nobuhiko Ibaraki ,  Kenji Ochiai ,  Atsushi Inada ,  Sakae Wada ,  Takaaki Minamida ,  Mamoru Nagao

发明人： Koichi Makii ,  Nobuhiko Ibaraki ,  Kenji Ochiai ,  Atsushi Inada ,  Sakae Wada ,  Takaaki Minamida ,  Mamoru Nagao

IPC分类号： C22C3802

CPC分类号： D02G3/48 ,  C21D8/06 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/28

摘要： Disclosed herein are a high-carbon steel wire having high strength and superior in resistance to longitudinal cracking, a steel for said high-carbons steel wire, and a process for producing said steel. The high-carbon steel wire is characterized in that the essential components are C (0.65-1.2 wt %), Si (0.1-2.0 wt %), Mn (0.2-2.0 wt %), and Fe, the main phase is pearlite, and the ferrite area ratio is less than 0.40 % in the surface layer up to a depth of 50 &mgr;m from the surface. The high-carbon steel may further contain B (0.0003-0.0050 wt %), Ti (less than 0.030 wt %), and N (less than 0.0050 wt %), with the amount of B, Ti, and N satisfying the following equation 0.03≦B/(Ti/3.43−N)≦5.0 The resulting steel wire produced in the usual way contains ferrite in an amount less than 0.40 wt % in its surface layer. This low ferrite content is responsible for good resistance to longitudinal cracking because ferrite causes longitudinal cracking to start from it.

摘要翻译： 本发明公开了一种高强度，耐纵向开裂性优异的高碳钢丝，所述高碳钢丝的钢及其制造方法。 高碳钢丝的特征在于，主要组分为C（0.65-1.2重量％），Si（0.1-2.0重量％），Mn（0.2-2.0重量％）和Fe，主相为珠光体， 并且表面层的铁素体面积率小于0.40μm，距表面50μm的深度。 高碳钢可以进一步含有B（0.0003〜0.0050重​​量％），Ti（小于0.030重量％）和N（小于0.0050重​​量％），其中B，Ti和N的量满足以下等式 以通常方式制造的所得钢丝在其表面层中含有小于0.40重量％的铁素体。 这种低铁素体含量是由于铁素体引起纵向开裂从而起到良好的纵向开裂性能。

公开(公告)号：US07037387B2

公开(公告)日：2006-05-02

申请号：US10473131

申请日：2003-02-05

申请人： Mamoru Nagao ,  Takuya Kochi ,  Masahiro Nomura ,  Hiroshi Yaguchi ,  Takaaki Minamida ,  Noriaki Hiraga

发明人： Mamoru Nagao ,  Takuya Kochi ,  Masahiro Nomura ,  Hiroshi Yaguchi ,  Takaaki Minamida ,  Noriaki Hiraga

IPC分类号： C22C38/02 ,  C21D8/06

CPC分类号： C22C38/02 ,  C21D1/19 ,  C21D1/76 ,  C21D8/06 ,  Y10T428/12431

摘要： The present invention provides a steel wire rod excellent in scale peelability for mechanical descaling, and a manufacturing method thereof.The steel wire rod in accordance with the present invention has: a base metal portion formed of a steel containing C in an amount of not more than 1.1% and Si in an amount of 0.05 to 0.80% on a mass % basis as components; and a scale layer deposited on the surface of the base metal portion, wherein the Si average concentration in the interface portion of the scale with the base metal portion is not less than 2.0 times the Si content of the base metal portion.

摘要翻译： 本发明提供一种机械除锈除鳞性优异的钢丝棒及其制造方法。 根据本发明的钢线材具有以质量％为基准的含有不超过1.1％的C和0.05至0.80％的Si的钢构成的贱​​金属部分; 以及沉积在基底金属部分的表面上的刻度层，其中刻度与基底金属部分的界面部分中的Si平均浓度不小于贱金属部分的Si含量的2.0倍。

公开(公告)号：US5776267A

公开(公告)日：1998-07-07

申请号：US728530

申请日：1996-10-09

申请人： Shigenobu Nanba ,  Hiroshi Yaguchi ,  Masataka Shimotsusa ,  Nobuhiko Ibaraki ,  Takenori Nakayama ,  Takashi Iwata ,  Yoshinori Yamamoto ,  Norio Ohkouchi ,  Mamoru Nagao

发明人： Shigenobu Nanba ,  Hiroshi Yaguchi ,  Masataka Shimotsusa ,  Nobuhiko Ibaraki ,  Takenori Nakayama ,  Takashi Iwata ,  Yoshinori Yamamoto ,  Norio Ohkouchi ,  Mamoru Nagao

IPC分类号： C22C38/42 ,  C22C38/44 ,  C22C38/02

CPC分类号： C22C38/42 ,  C22C38/44 ,  Y10S148/908

摘要： The present invention provides a spring steel with excellent performance, characterized in that the spring steel is produced by making a spring steel contain an appropriate amount of at least one or more of Ti, Nb, Zr, Ta, and Hf, thereby generating fine inclusions including carbide, nitride, sulfides and/or their complex compounds, to make the inclusions exert the effect of trapping diffusive hydrogen whereby the resistance to hydrogen embrittlement is enhanced, wherein the size and number of the coarse inclusions are regulated, thereby suppressing the decrease of the fatigue life. The spring steel can provide a valve spring or a suspension spring or the like, with enhanced strength and higher stress resistance, together with improved resistance to hydrogen embrittlement and fatigue.

摘要翻译： 本发明提供一种性能优良的弹簧钢，其特征在于，通过使弹簧钢含有适当量的Ti，Nb，Zr，Ta，Hf中的至少一种以上，从而产生微细夹杂物 包括碳化物，氮化物，硫化物和/或它们的络合物，使夹杂物发挥捕获扩散氢的作用，从而提高耐氢脆性，其中粗大夹杂物的尺寸和数量被调节，从而抑制了 疲劳寿命。 弹簧钢可以提供具有增强的强度和更高的抗应力的阀弹簧或悬架弹簧等，同时改善了耐氢脆性和疲劳性。

公开(公告)号：US07258756B2

公开(公告)日：2007-08-21

申请号：US10968253

申请日：2004-10-20

申请人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

发明人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

IPC分类号： C21D8/06 ,  C22C38/02 ,  C22C38/04

CPC分类号： C22C38/04 ,  B21C1/04 ,  B21C9/005 ,  B21C37/047 ,  C21D8/06 ,  C21D9/525 ,  C21D2211/009 ,  C22C38/02

摘要： The very thin, high carbon wire is 0.05 to 0.50 mm in diameter and comprises, in mass %, 0.90-1.20% of C, 0.05-1.2% of Si, 0.2-1.0% of Mn, and 0.0050% or less of N, with the balance being iron and impurities. In a differential scanning thermal analysis curve A of the steel wire, the steel wire has an exothermic peak X in the temperature range of 60° to 130° C., and a maximum height h of the exothermic peak X relative to a reference line Y joining the point of 60° C. and the point of 130° C. in the differential scanning thermal analysis curve is set at 5 μW/mg or more. The very thin, high carbon steel wire is free of delamination in high-speed stranding and superior in both strength and ductility.

摘要翻译： 非常薄的高碳丝的直径为0.05-0.50mm，以质量％计含有C：0.90-1.20％，Si：0.05-1.2％，Mn：0.2-1.0％，N：0.0050％ 余量为铁和杂质。 在钢丝的差示扫描热分析曲线A中，钢线在60〜130℃的温度范围内具有放热峰X，相对于基准线Y的放热峰X的最大高度h 将差示扫描热分析曲线中的60℃的点和130℃的点连接设定为5μW/ mg以上。 非常薄的高碳钢丝在高速绞合中没有分层，并且在强度和延展性方面都是优异的。

公开(公告)号：US06783609B2

公开(公告)日：2004-08-31

申请号：US10171593

申请日：2002-06-17

申请人： Hideo Hata ,  Mamoru Nagao ,  Takaaki Minamida

发明人： Hideo Hata ,  Mamoru Nagao ,  Takaaki Minamida

IPC分类号： C22C3802

CPC分类号： C22C38/04 ,  C21D8/06 ,  C21D2211/009 ,  C22C38/02

摘要： A high-carbon steel wire rod with superior drawability which has the chemical composition (in mass %) of C: 0.6-1.0%, Si: 0.1-1.5%, Mn: 0.3-0.9%, P: no more than 0.02%, S no more than 0.03%, N: no more than 0.005%, (optional Nb: 0.020-0.050% and V: 0.05-0.20%), with the remainder being Fe and inevitable impurities, and the structure which is characterized in that pearlite accounts for no less than 95 area % and pearlite has an average nodule diameter (P &mgr;m) no larger than 30 &mgr;m and an average lamella space (S nm) no smaller than 100 nm such that the value of F calculated by the formula below is larger than zero F=350.3/{overscore (S)}+130.3/{overscore (P)}−51.7.

摘要翻译： 具有C：0.6〜1.0％，Si：0.1〜1.5％，Mn：0.3〜0.9％，P：不大于0.02％的化学组成（质量％）的高拉伸性的高碳钢线材， S不超过0.03％，N：不大于0.005％（可选Nb：0.020-0.050％，V：0.05-0.20％），其余为Fe和不可避免的杂质，其特征在于珠光体 不小于95面积％，并且珠光体具有不大于30μm的平均结节直径（P mum）和不小于100nm的平均层间距（S nm），使得通过下式计算的F值为 大于零

公开(公告)号：US20060048864A1

公开(公告)日：2006-03-09

申请号：US10528263

申请日：2003-09-24

申请人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

发明人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

IPC分类号： C22C38/00

CPC分类号： C22C38/02 ,  C21D8/06 ,  C21D9/5732 ,  C21D2211/009 ,  C22C38/04 ,  C22C38/40

摘要： A hot-rolled wire rod: the wire rod being a hot-rolled wire rod 5.0 mm or more in diameter, containing in mass C: 0.6 to 1.0%, Si: 0.1 to 1.5%, Mn: 0.3 to 1.0%, P: 0.02% or less, and S: 0.02% or less; not less than 90% of the wire rod in area percentage being composed of a pearlite structure; and the mechanical properties of the wire rod 4 m in length satisfying the following expressions (1) to (4), (1) TS*−30≦Average value of tensile strength (TSAV in MPa)≦TS*+30, where, TS*=400×{[C]+([Mn]+[Si])/5}+670 and the elements in square brackets [ ] in the equality mean the contents of relevant elements in percentage, (2) Standard deviation of tensile strength (TSσ)≦30 MPa, (3) Average value of reduction of area (RAAV)>35%, (4) Standard deviation of reduction of area (RAσ) ≦4%. A hot-rolled wire rod according to the present invention is incomparably excellent in wire drawability and brakes less frequently than a conventional wire rod even when it is processed as hot-rolled with heat treatment such as patenting treatment omitted.

摘要翻译： 热轧线材：线材为直径5.0mm以上的热轧线材，质量C：0.6〜1.0％，Si：0.1〜1.5％，Mn：0.3〜1.0％，P： 0.02％以下，S：0.02％以下。 不少于90％的线材面积百分比由珠光体组织构成; 以及长度满足下述式（1）〜（

公开(公告)号：US20050087270A1

公开(公告)日：2005-04-28

申请号：US10968253

申请日：2004-10-20

申请人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

发明人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

IPC分类号： B21C1/00 ,  B21C1/04 ,  B21C9/00 ,  B21C37/04 ,  C21D8/06 ,  C21D9/52 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/54

CPC分类号： C22C38/04 ,  B21C1/04 ,  B21C9/005 ,  B21C37/047 ,  C21D8/06 ,  C21D9/525 ,  C21D2211/009 ,  C22C38/02

摘要： The very thin, high carbon wire is 0.05 to 0.50 mm in diameter and comprises, in mass %, 0.90-1.20% of C, 0.05-1.2% of Si, 0.2-1.0% of Mn, and 0.0050% or less of N, with the balance being iron and impurities. In a differential scanning thermal analysis curve A of the steel wire, the steel wire has an exothermic peak X in the temperature range of 60° to 130° C., and a maximum height h of the exothermic peak X relative to a reference line Y joining the point of 60° C. and the point of 130° C. in the differential scanning thermal analysis curve is set at 5 μW/mg or more. The very thin, high carbon steel wire is free of delamination in high-speed stranding and superior in both strength and ductility.

摘要翻译： 非常薄的高碳丝的直径为0.05-0.50mm，以质量％计含有C：0.90-1.20％，Si：0.05-1.2％，Mn：0.2-1.0％，N：0.0050％ 余量为铁和杂质。 在钢丝的差示扫描热分析曲线A中，钢线在60〜130℃的温度范围内具有放热峰X，相对于基准线Y的放热峰X的最大高度h 将差示扫描热分析曲线中的60℃的点和130℃的点连接设定为5μW/ mg以上。 非常薄的高碳钢丝在高速绞合中没有分层，并且在强度和延展性方面都是优异的。

公开(公告)号：US07850793B2

公开(公告)日：2010-12-14

申请号：US10528263

申请日：2003-09-24

申请人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

发明人： Mamoru Nagao ,  Takeshi Kuroda ,  Takaaki Minamida

IPC分类号： C22C38/00

CPC分类号： C22C38/02 ,  C21D8/06 ,  C21D9/5732 ,  C21D2211/009 ,  C22C38/04 ,  C22C38/40

摘要： A hot-rolled wire rod:the wire rod being a hot-rolled wire rod 5.0 mm or more in diameter, containing in mass C: 0.6 to 1.0%, Si: 0.1 to 1.5%, Mn: 0.3 to 1.0%, P: 0.02% or less, and S: 0.02% or less; not less than 90% of the wire rod in area percentage being composed of a pearlite structure; and the mechanical properties of the wire rod 4 m in length satisfying the following expressions (1) to (4), (1) TS*−30≦Average value of tensile strength (TSAV in MPa)≦TS*+30, where, TS*=400×{[C]+([Mn]+[Si])/5}+670 and the elements in square brackets [ ] in the equality mean the contents of relevant elements in percentage, (2) Standard deviation of tensile strength (TSσ)≦30 MPa, (3) Average value of reduction of area (RAAV)>35%, (4) Standard deviation of reduction of area (RAσ)≦4%. A hot-rolled wire rod according to the present invention is incomparably excellent in wire drawability and brakes less frequently than a conventional wire rod even when it is processed as hot-rolled with heat treatment such as patenting treatment omitted.

摘要翻译： 热轧线材：线材为直径5.0mm以上的热轧线材，质量C：0.6〜1.0％，Si：0.1〜1.5％，Mn：0.3〜1.0％，P： 0.02％以下，S：0.02％以下。 不少于90％的线材面积百分比由珠光体组织构成; （1）〜（4），（1）TS * -30＆nlE的拉伸强度的平均值（TSAV，MPa）＆amp; NlE; TS * + 30，其中， ，TS * = 400×{[C] +（[Mn] + [Si]）/ 5} +670，方括号[]中的元素等于相关元素的百分比含量，（2）标准偏差 的拉伸强度（TS＆sgr。）＆nlE; 30MPa，（3）面积减少平均值（RAAV）> 35％，（4）面积减少的标准偏差（RA＆sgr）＆nlE; 4％。 根据本发明的热轧线材即使在热处理如热处理如专利处理被省略时，也可以比现有的线材更频繁地拉丝性和制动性优异。