High strength bolt excellent in delayed fracture resistance and method of production of same
    1.
    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

    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
    2.
    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

    IPC分类号: C22C38/12

    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。

    Process for producing benzo[f]quinoxaline compounds
    7.
    发明授权
    Process for producing benzo[f]quinoxaline compounds 有权
    苯并[f]喹喔啉化合物的制备方法

    公开(公告)号:US08772484B2

    公开(公告)日:2014-07-08

    申请号:US13412682

    申请日:2012-03-06

    IPC分类号: C07D487/12 C07D241/10

    摘要: A simple process for producing v-coelenterazine compounds has been desired. Described is a process for producing a v-coelenterazine compound represented by general formula (II) comprising (1) the step of reacting a compound of general formula (VIII) with a methyltriphenylphosphonium salt in the presence of a base to give a compound represented by general formula (IX), (2) the step of performing a ring-closing metathesis reaction on any one selected from the group consisting of the compound represented by general formula (IX) and a compound of general formula (X) which is the compound of general formula (IX) wherein the amino is protected with R5, and then deprotecting R4 and, if any, R5 to give a v-coelenteramine compound represented by general formula (XIV), and (3) the step of reacting the compound of general formula (XIV) with a compound represented by general formula (XV) to give the compound of general formula (II).

    摘要翻译: 已经需要制备v-肠溶纤维素化合物的简单方法。 本发明描述了一种制备由通式(II)表示的β-环糊精化合物的方法,包括(1)在碱存在下使通式(Ⅷ)化合物与甲基三苯基鏻盐反应,得到由 通式(IX),(2)对选自由通式(IX)表示的化合物和作为化合物的通式(X)的化合物的任何一种进行闭环复分解反应的步骤 的通式(IX)的化合物,其中氨基被R 5保护,然后使R 4和(如果有的话)R 5脱保护,得到由通式(XIV)表示的v-内网络胺化合物,和(3) 通式(XIV)与通式(XV)表示的化合物反应,得到通式(II)的化合物。

    CUTTING METHOD OF STEEL FOR MACHINE STRUCTURAL USE
    9.
    发明申请
    CUTTING METHOD OF STEEL FOR MACHINE STRUCTURAL USE 有权
    用于机械结构用钢的切割方法

    公开(公告)号:US20120085209A1

    公开(公告)日:2012-04-12

    申请号:US13377018

    申请日:2011-03-03

    IPC分类号: B26D7/08

    摘要: The cutting method of steel for machine structural use includes: forming a mist by mixing a cutting fluid supplied at a supply rate of 0.01 ml/hour to 200 ml/hour and an oxidizing gas containing, by volume %, 21% to 50% of oxygen; and cutting the steel for machine structural use while the mist is blown on the cutting edge surface of a tool and the surface of the steel for machine structural use, wherein the steel for machine structural use includes, by mass %: C: 0.01% to 1.2%, Si: 0.005% to 3.0%, Mn: 0.05% to 3.0%, P: 0.001% to 0.2%, S: 0.001% to 0.35%, N: 0.002% to 0.035%, Al: 0.05% to 1.0%, and the balance consisting of Fe and inevitable impurities in which O is limited to 0.003% or less, and the amount of Al [Al %] and the amount of N [N %] satisfy [Al %]−(27/14)×[N %]≧0.05.

    摘要翻译: 用于机械结构用途的钢的切割方法包括:通过将以0.01ml /小时的供给速度供给的切削液与200ml /小时的混合形成雾,以及以体积%计含有21%至50%的 氧; 并且在将工具的切削刃表面和机械结构用钢的表面喷雾时,切割用于机械结构的钢,其中,机械结构用钢为质量%:C:0.01%〜 1.2%,Si:0.005〜3.0%,Mn:0.05〜3.0%,P:0.001〜0.2%,S:0.001〜0.35%,N:0.002%〜0.035%,Al:0.05〜1.0% ,余量由Fe和不可避免的杂质构成,其中O限制在0.003%以下,Al [Al%]和N [N%]的量满足[Al%] - (27/14) ×[N%]≥0.05。

    LOW SPECIFIC GRAVITY STEEL FOR FORGING USE EXCELLENT IN MACHINEABILITY
    10.
    发明申请
    LOW SPECIFIC GRAVITY STEEL FOR FORGING USE EXCELLENT IN MACHINEABILITY 审中-公开
    用于锻造的低特殊重力钢具有优异的机械性能

    公开(公告)号:US20110318218A1

    公开(公告)日:2011-12-29

    申请号:US13138534

    申请日:2010-04-08

    IPC分类号: C22C38/18 C22C38/60 C22C38/06

    摘要: Steel for forging having high strength and superior machinability due to controlled cooling immediately after shaping by hot forging followed by tempering and having a lower specific gravity than ordinary steel for forging use, the steel containing C: 0.05 to 0.50%, Si: 0.01 to 1.50%, Mn: 3.0 to 7.0%, P: 0.001 to 0.050%, S: 0.020 to 0.200%, Al: 3.0 to 6.0%, Cr: 0.01 to 1.00%, and N: 0.0040 to 0.0200% and having a balance of Fe and unavoidable impurities.

    摘要翻译: 锻造用钢通过热锻成形后立即控制冷却而具有高强度和优异的机械加工性,因此通过锻造而成型后的比例比通常的锻造用钢低,C:0.05〜0.50%,Si:0.01〜1.50 %,Mn:3.0〜7.0%,P:0.001〜0.050%,S:0.020〜0.200%,Al:3.0〜6.0%,Cr:0.01〜1.00%,N:0.0040〜0.0200% 和不可避免的杂质。