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    HIGH-STRENGTH STEEL MATERIAL WITH EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE
    11.
    发明申请
    HIGH-STRENGTH STEEL MATERIAL WITH EXCELLENT HYDROGEN EMBRITTLEMENT RESISTANCE 有权
    具有优异耐腐蚀性的高强度钢材

    公开(公告)号：US20110268600A1

    公开(公告)日：2011-11-03

    申请号：US13183710

    申请日：2011-07-15

    申请人： Shingo YAMASAKI ,  Daisuke Hirakami ,  Toshimi Tarui ,  Seiki Nishida

    发明人： Shingo YAMASAKI ,  Daisuke Hirakami ,  Toshimi Tarui ,  Seiki Nishida

    IPC分类号： C22C38/46 ,  C22C38/20 ,  C22C38/22 ,  C22C38/12 ,  C22C38/32 ,  C22C38/08 ,  C22C38/44 ,  C22C38/16 ,  C22C38/24

    CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/22 ,  C22C38/24 ,  C23C8/40

    摘要： The invention provides a steel material with satisfactory hydrogen embrittlement resistance, and particularly it relates to high-strength steel with satisfactory hydrogen embrittlement resistance and a strength of 1200 MPa or greater, as well as a process for production thereof. At least one simple or compound deposit of oxides, carbides or nitrides as hydrogen trap sites which trap hydrogen with a specific trap energy is added to steel, where the mean sizes, number densities, and length-to-thickness ratios (aspect ratio) are in specific ranges. By applying the specific steel components and production process it is possible to obtain high-strength steel with excellent hydrogen embrittlement resistance.

    摘要翻译： 本发明提供具有令人满意的耐氢脆性的钢材，特别涉及具有良好的耐氢脆性和1200MPa以上的强度的高强度钢及其制造方法。 将至少一种简单或复合的氧化物，碳化物或氮化物沉积物作为捕集具有特定阱能量的氢的氢捕集点添加到钢中，其中平均尺寸，数量密度和长度与厚度比（纵横比） 在特定范围内。 通过应用特定的钢部件和制造方法，可以获得耐氢脆性优异的高强度钢。

    High strength bolt excellent in delayed fracture resistance and method of production of same
    13.
    发明授权
    High strength bolt excellent in delayed fracture resistance and method of production of same 有权
    耐久性优异的高强度螺栓及其制造方法

    公开(公告)号：US07510614B2

    公开(公告)日：2009-03-31

    申请号：US11490975

    申请日：2006-07-21

    申请人： Suguru Yoshida ,  Toshimi Tarui ,  Manabu Kubota ,  Hideki Matsuda ,  Tadashi Ohya ,  Koki Mizuno

    发明人： Suguru Yoshida ,  Toshimi Tarui ,  Manabu Kubota ,  Hideki Matsuda ,  Tadashi Ohya ,  Koki Mizuno

    IPC分类号： C22C28/02 ,  C22C38/04 ,  C22C38/06 ,  C21D8/00

    CPC分类号： B21K1/46 ,  B21H3/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  F16B35/00

    摘要： The present invention provides a high strength bolt excellent in delayed fracture resistance able to advantageously prevent hydrogen embrittlement as represented by the delayed fracture phenomenon occurring along with an increase in strength and causing a particular problem, and a method of production of the same, containing, by mass %, C: 0.2 to 0.6%, Si: 0.05 to 0.5%, Mn: 0.1 to 2%, Mo: 0.5 to 6%, and Al: 0.005 to 0.5%, having a tensile strength of 1400 MPa or more, and having a compressive residual stress of the surface layer of the thread root of 10 to 90% of the tensile strength. Further, a surface layer part of the thread root from the surface down to at least 50 μm has pre-austenite grains with an aspect ratio of the axial direction and radial direction of 2 or more and that part has a hardness of Hv 460 or more. Further, the method of production comprises using the steel material having the above ingredients to shape the bolt head and shaft, then heat the bolt to 900 to 1100° C., quench it, temper it by a 580° C. or higher temperature, then thread roll it.

    摘要翻译： 本发明提供了一种具有优异的延迟断裂抵抗性的高强度螺栓，其能够有利地防止随着强度的增加而发生的延迟断裂现象所引起的氢脆化，并引起特定问题，及其制造方法， 以下，拉伸强度为1400MPa以上，C：0.2〜0.6％，Si：0.05〜0.5％，Mn：0.1〜2％，Mo：0.5〜6％，Al：0.005〜 并且具有螺纹根表面层的抗拉强度的10〜90％的压缩残余应力。 此外，从表面向下至至少50μm的螺纹根部的表面层部分具有轴向和径向的纵横比为2以上的预奥氏体晶粒，并且该部分的硬度为Hv 460以上 。 此外，生产方法包括使用具有上述成分的钢材来成形螺栓头和轴，然后将螺栓加热至900至1100℃，淬火，回火580℃或更高的温度， 然后卷起它。

    High strength bolt excellent in delayed fracture resistance and method of production of same
    14.
    发明申请
    High strength bolt excellent in delayed fracture resistance and method of production of same 有权
    耐久性优异的高强度螺栓及其制造方法

    公开(公告)号：US20070017610A1

    公开(公告)日：2007-01-25

    申请号：US11490975

    申请日：2006-07-21

    申请人： Suguru Yoshida ,  Toshimi Tarui ,  Manabu Kubota ,  Hideki Matsuda ,  Tadashi Ohya ,  Koki Mizuno

    发明人： Suguru Yoshida ,  Toshimi Tarui ,  Manabu Kubota ,  Hideki Matsuda ,  Tadashi Ohya ,  Koki Mizuno

    IPC分类号： C22C38/12

    CPC分类号： B21K1/46 ,  B21H3/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  F16B35/00

    摘要： The present invention provides a high strength bolt excellent in delayed fracture resistance able to advantageously prevent hydrogen embrittlement as represented by the delayed fracture phenomenon occurring along with an increase in strength and causing a particular problem, and a method of production of the same, containing, by mass %, C: 0.2 to 0.6%, Si: 0.05 to 0.5%, Mn: 0.1 to 2%, Mo: 0.5 to 6%, and Al: 0.005 to 0.5%, having a tensile strength of 1400 MPa or more, and having a compressive residual stress of the surface layer of the thread root of 10 to 90% of the tensile strength. Further, a surface layer part of the thread root from the surface down to at least 50 μm has pre-austenite grains with an aspect ratio of the axial direction and radial direction of 2 or more and that part has a hardness of Hv 460 or more. Further, the method of production comprises using the steel material having the above ingredients to shape the bolt head and shaft, then heat the bolt to 900 to 1100° C., quench it, temper it by a 580° C. or higher temperature, then thread roll it.

    摘要翻译： 本发明提供了一种具有优异的延迟断裂性的高强度螺栓，其能够有利地防止随着强度的增加而发生的延迟断裂现象所引起的氢脆化，并引起特定问题，及其制备方法， 以下，拉伸强度为1400MPa以上，C：0.2〜0.6％，Si：0.05〜0.5％，Mn：0.1〜2％，Mo：0.5〜6％，Al：0.005〜 并且具有螺纹根表面层的抗拉强度的10〜90％的压缩残余应力。 此外，从表面向下至至少50μm的螺纹根部的表面层部分具有轴向和径向的纵横比为2以上的预奥氏体晶粒，并且该部分的硬度为Hv 460以上 。 此外，生产方法包括使用具有上述成分的钢材来成形螺栓头和轴，然后将螺栓加热至900至1100℃，淬火，回火580℃或更高的温度， 然后卷起它。

    Fine graphite uniform dispersion steel excellent in cold machinability, cuttability and hardenability, and production method for the same
    19.
    发明授权
    Fine graphite uniform dispersion steel excellent in cold machinability, cuttability and hardenability, and production method for the same 失效
    冷加工性，切断性和淬透性优异的细石墨均匀分散钢及其制造方法

    公开(公告)号：US5830285A

    公开(公告)日：1998-11-03

    申请号：US700355

    申请日：1996-08-23

    申请人： Sakae Katayama ,  Toshimi Tarui ,  Masahiro Toda ,  Ken-ichiro Naito

    发明人： Sakae Katayama ,  Toshimi Tarui ,  Masahiro Toda ,  Ken-ichiro Naito

    IPC分类号： C21D1/26 ,  C21D1/84 ,  C21D5/14 ,  C21D8/06 ,  C22C38/12 ,  C22C38/60 ,  C22C38/04 ,  C22C38/06

    CPC分类号： C22C38/12 ,  C21D1/26 ,  C21D1/84 ,  C21D8/06 ,  C22C38/60 ,  C21D2211/005 ,  C21D2211/006 ,  C21D5/14 ,  F16H2061/145

    摘要： A fine graphite uniform dispersion steel material excellent in cold workability, cuttability and hardenability, which has graphite finely and uniformly dispersed therein, and a production method for producing the same. The steel contains at least 0.30 to 1.0% of C, 0.4 to 1.3% of Si, 0.3 to 1.0% of Mn, 0.0003 to 0.006% of B, 0.002 to 0.010% of N and 0.05 to 0.20% of Mo as the basic components and contains graphite having a mean particle diameter of not more than 4.0 .mu.m and a number of particles per unit and of at least 3,000 per mm.sup.2. The production method includes at least the steps of cooling the steel having these components at a cooling start temperature of not less than an A.sub.rl point, a cooling end temperature of not more than an M.sub.s point and a mean cooling rate of 5.degree. to 100.degree. C./s.

    摘要翻译： PCT No.PCT / JP95 / 00276 Sec。 371日期：1996年8月23日 102（e）日期1996年8月23日PCT提交1995年2月24日PCT公布。 公开号WO95 / 23241 日期1995年8月31日具有精细且均匀分散石墨的冷加工性，切削性和淬透性优异的细石墨均匀分散钢及其制造方法。 该钢含有C：0.30〜1.0％，Si：0.4〜1.3％，Mn：0.3〜1.0％，B：0.003〜0.006％，N：0.002〜0.010％，Mo：0.05〜0.20％ 并且含有平均粒径不大于4.0μm的石墨和每单位数量的颗粒数和至少3,000个/ mm 2的石墨。 该制造方法至少包括在不低于Arl点的冷却开始温度，不高于Ms点的冷却结束温度和5℃至100℃的平均冷却速度下冷却具有这些组分的钢的步骤 C./s。

    Method of directly softening rolled machine structural steels
    20.
    发明授权
    Method of directly softening rolled machine structural steels 失效
    直接软化轧制机结构钢的方法

    公开(公告)号：US4753691A

    公开(公告)日：1988-06-28

    申请号：US18575

    申请日：1987-02-25

    申请人： Toshimi Tarui ,  Toshihiko Takahashi ,  Hiroshi Sato

    发明人： Toshimi Tarui ,  Toshihiko Takahashi ,  Hiroshi Sato

    IPC分类号： C21D6/00 ,  C21D1/32 ,  C21D8/00 ,  C22C38/00 ,  C22C38/32 ,  C22C38/54

    CPC分类号： C21D1/32 ,  C21D8/00 ,  C22C38/32

    摘要： A method of directly softening a rolled machine structural steel is provided. This method is characterized by the fact that it comprises the steps of:hot rolling a steel consisting essentially of 0.2-0.65% C, less than 0.1% Si, 0.2-0.5% Mn, 0.0003-0.01% B, more than 0.5-1.7% Cr, 0.01-0.1% Al, all of the percentages being on a weight basis, and the balance being Fe and incidental impurities, and may contain one or more other alloying elements selected from either one of or both of groups (A) and (B), group (A) consisting of not more than 1% Ni, 0.1-0.5% Mo and not more than 1% Cu, and the other group (B) consisting of 0.002-0.05% Ti, 0.005-0.05% Nb and 0.005-0.2% V,then subjecting said rolled steel to either one of the two softening treatments (1) or (2), the treatment (1) comprises slowly cooling the steel in a temperature range until transformation to pearlite is completed at a cooling rate of less than 15.degree. C./min, and the treatment (2) comprises, isothermally holding said steel in a temperature range of 680.degree. to 730.degree. C. until the transformation to pearlite is completed and then to natural cooling, so that the steel can display a tensile strength less than a value expressed by a formula,24+67.times.Ceq (kg/mm.sup.2), specified by the carbon equivalent Ceq (kg/mm.sup.2) of the subject steel.

    摘要翻译： 提供了一种直接软化轧制机械结构钢的方法。 该方法的特征在于它包括以下步骤：将基本上由0.2-0.65％C，小于0.1％Si，0.2-0.5％Mn，0.0003-0.01％B，大于0.5-1.7％的钢热轧 ％Cr，0.01-0.1％Al，所有百分比均以重量为基准，余量为Fe和附带杂质，并且可含有一种或多种其它选自基团（A）和 （B），由不超过1％Ni，0.1-0.5％Mo和不超过1％Cu组成的组（A），另一组（B）由0.002-0.05％Ti，0.005-0.05％Nb 和0.005-0.2％V，然后对所述轧制钢进行两个软化处理（1）或（2）中的任一个，处理（1）包括在一定温度范围内缓慢冷却钢，直至在珠光体转变为 冷却速度小于15℃/ min，处理（2）包括在680〜730℃的温度范围内等温保持钢，直到转变为pe 然后进行自然冷却，使得钢可以显示低于由公式表示的值的拉伸强度，24 + 67xCeq（kg / mm2），由对象的碳当量Ceq（kg / mm2）指定 钢。