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21. 发明专利

JP2007031736A Method for manufacturing high strength bolt excellent in delayed fracture resistance 有权
$Method for manufacturing high strength bolt excellent in delayed fracture resistance$
标题翻译：用于制造延长抗断裂韧性的高强度螺栓的方法
公开(公告)号：JP2007031736A
公开(公告)日：2007-02-08
申请号：JP2005212218
申请日：2005-07-22
申请人： Honda Motor Co Ltd , Nippon Steel Corp , 新日本製鐵株式会社 , 本田技研工業株式会社
发明人： YOSHIDA TAKU , SENDA TETSUSHI , KUBOTA MANABU , TARUI TOSHIZO , MATSUDA HIDEKI , MIZUNO YOSHIKI , OTANI TADASHI
IPC分类号： C21D9/00 , C22C38/00 , C22C38/12 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a high strength bolt excellent in delayed fracture resistance with which a hydrogen enbrittlement represented by the delayed fracture having ≥1600 MPa tensile strength, is favorably prevented.
SOLUTION: A steel composed by mass% of 0.2-0.6% C, 0.05-0.5% Si, 0.1-2% Mn, 0.5-10% Mo, 0.005-0.5% Al and if necessary, prescribed quantities of V, Ti, Nb, Cr, Ni, Cu, B and the balance Fe with inevitable impurities, is rapidly heated to 600-750°C at ≥5°C/sec temperature-raising speed from at least ≥300°C of the surface temperature of the steel material after forming martensitic structure by quenching from ≥900°C, and air-cooled or acceleration-cooled after holding the steel at the above heating temperature range for 0-20sec.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：待解决的问题：提供一种制造具有优异的延迟断裂性的高强度螺栓的方法，通过该方法可以防止由具有≥1600MPa拉伸强度的延迟断裂表示的氢脆性。
解决方案：由质量％为0.2-0.6％C，0.05-0.5％Si，0.1-2％Mn，0.5-10％Mo，0.005-0.5％Al和必要时规定量的V组成的钢， Ti，Nb，Cr，Ni，Cu，B和余量的Fe与不可避免的杂质，在≥5℃/秒的升温速度下从表面温度的至少≥300℃快速加热至600-750℃ 的钢材在通过900℃以上淬火成型后形成马氏体组织，在将钢材保持在上述加热温度范围0〜20秒后进行风冷或加速冷却。版权所有（C）2007，JPO＆INPIT

22. 发明专利

JP2009299180A High strength steel having excellent delayed fracture resistance, high strength bolt, and method for producing the same 有权
$High strength steel having excellent delayed fracture resistance, high strength bolt, and method for producing the same$
标题翻译：具有优异延长耐断裂性，高强度螺栓的高强度钢及其制造方法
公开(公告)号：JP2009299180A
公开(公告)日：2009-12-24
申请号：JP2009061544
申请日：2009-03-13
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HIRAGAMI DAISUKE , SENDA TETSUSHI , TARUI TOSHIZO
IPC分类号： C22C38/00 , C21D1/06 , C21D8/06 , C21D9/00 , C22C38/58 , F16B35/00
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel having excellent delayed fracture resistance even in an environment where corrosion is severe, and to provide a method for producing the high strength steel.
SOLUTION: The high strength steel having excellent delayed fracture resistance is characterized in that the depth of a nitrided layer in the surface is ≥200 μm. Particularly, in the case the compressive residual quantity of the surface is ≥200 MPa, its delayed fracture resistance improves. The steel comprises proper amounts of C, Si and Mn, comprises one or two kinds selected from V and Mo, also satisfies the relation of V+Mo/2>0.4%, and further comprises one or more kinds selected from Cr, Nb, Cu, Ni and B. By increasing the nitrogen concentration by ≥0.02% than the average nitrogen concentration to a depth of at least ≥200 μm from the surface of the steel, the intrusion of diffusible hydrogen is remarkably suppressed, and its delayed fracture resistance improves. Further, since the carbides, nitrides and carbonitrides of V and Mo are finely precipitated, intruded diffusible hydrogen is made harmless, so as to increase a limit diffusible hydrogen content.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：即使在腐蚀严重的环境中也提供具有优异的延迟断裂性的高强度钢，并且提供一种高强度钢的制造方法。解决方案：具有优异的耐延迟断裂性的高强度钢的特征在于，表面中的氮化层的深度≥200μm。特别地，在表面的压缩残留量≥200MPa的情况下，其延迟断裂阻力提高。该钢包含适量的C，Si和Mn，包括选自V和Mo中的一种或两种，也满足V + Mo / 2> 0.4％的关系，并且还包括选自Cr，Nb， Cu，Ni和B.通过从钢表面将氮浓度比平均氮浓度提高至至少≥200μm深度的≥0.02％，可扩散氢的侵入被显着抑制，并且其延迟的抗断裂性改善此外，由于V和Mo的碳化物，氮化物和碳氮化物被精细地沉淀，所以侵入的扩散氢变得无害，从而增加极限扩散的氢含量。版权所有（C）2010，JPO＆INPIT

23. 发明专利

JP2006249561A High strength extrafine steel wire having excellent ductility 有权
标题翻译：具有优异强度的高强度钢丝绳
公开(公告)号：JP2006249561A
公开(公告)日：2006-09-21
申请号：JP2005071814
申请日：2005-03-14
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKAHASHI ATSUSHI , TARUI TOSHIZO , SUGIYAMA MASAAKI , TASHIRO HITOSHI
IPC分类号： C22C38/00 , C22C38/58
CPC分类号： D07B1/066 , D07B2205/3042 , D07B2205/3057 , D07B2801/10
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel wire having extremely excellent tensile strength and ductility. SOLUTION: In the high strength steel wire having excellent ductility, the average width of planar ferrite is ≤15 nm, and also, the average C concentration in the central part of the ferrite is ≤0.2 mass%. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有非常优异的拉伸强度和延展性的高强度钢丝。解决方案：在延展性优良的高强度钢丝中，平面铁素体的平均宽度≤15nm，铁素体中心部的平均C浓度≤0.2质量％。版权所有（C）2006，JPO＆NCIPI

24. 发明专利

JP2006131990A High strength bolt having excellent delayed fracture resistance and method for improving its delayed fracture resistance 有权
$High strength bolt having excellent delayed fracture resistance and method for improving its delayed fracture resistance$
标题翻译：具有优异延迟耐断裂性的高强度螺栓及其延迟抗断裂性的方法
公开(公告)号：JP2006131990A
公开(公告)日：2006-05-25
申请号：JP2005246973
申请日：2005-08-29
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TARUI TOSHIZO , FUJITA TAKASHI , YOSHIDA TAKU , SENDA TETSUSHI
IPC分类号： C22C38/00 , C21D7/06 , C21D9/00 , C22C38/14 , C22C38/58 , F16B31/06 , F16B35/00
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high strength bolt having satisfactory delayed fracture resistance, and having a strength of ≥1,500 MPa, and to provide a method for improving its delayed fracture resistance. SOLUTION: The high strength bolt having excellent delayed fracture resistance is composed of a steel having a composition comprising, by mass, 0.3 to 0.6% C, 0.05 to 2% Si, 0.1 to 2% Mn, 0.002 to 0.1% Al and 1 to 3% Mo, and further comprising one or more kinds of metals selected from 0.05 to 1% V, 0.01 to 1% Ti and 0.01 to 1% Nb, and the balance Fe with inevitable impurities, and in which the mass% ratio of the C also satisfies the inequality (A) 0.2≤(0.06Mo+0.18V+0.25Ti+0.13Nb)/C, and having a tensile strength of ≥1,500 MPa. The compressive residual stress of the surface layer in the under head part of the bolt is 20 to 90% the tensile strength of the steel. Further, the invention relates to a method for improving its delayed fracture resistance. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有令人满意的耐延迟断裂性并且具有≥1,500MPa的强度的高强度螺栓，并且提供一种提高其延迟抗断裂性的方法。解决方案：具有优异的耐延迟断裂性的高强度螺栓由具有以质量计含有0.3-0.6％C，0.05-2％Si，0.1-2％Mn，0.002-0.1％Al 和1〜3％的Mo，还含有选自0.05〜1％V，0.01〜1％Ti，0.01〜1％Nb，余量为Fe和不可避免的杂质的一种或多种金属，其中质量％ C的比例也满足不等式（A）0.2≤（0.06Mo + 0.18V + 0.25Ti + 0.13Nb）/℃，拉伸强度≥1,500MPa。螺栓下头部表面层的压缩残余应力为钢的拉伸强度的20〜90％。此外，本发明涉及一种提高其耐断裂性的方法。版权所有（C）2006，JPO＆NCIPI

25. 发明专利

JP2006104551A High strength machine part having excellent fatigue property and method for improving its fatigue property 有权
标题翻译：具有优异的疲劳性能的高强度机械部件和改善其疲劳性能的方法
公开(公告)号：JP2006104551A
公开(公告)日：2006-04-20
申请号：JP2004295861
申请日：2004-10-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TARUI TOSHIZO , FUJITA TAKASHI , OZAWA SHUJI
IPC分类号： C22C38/00 , C21D7/04 , C21D8/00 , C22C38/04 , C22C38/60 , F16C3/06 , F16H55/06
摘要： PROBLEM TO BE SOLVED: To provide high strength machine parts having a notched part with the radius of curvature of ≤25 mm and further having a surface HV hardness of ≥250, and to provide a method for improving its fatigue strength.
SOLUTION: Regarding the high strength machine parts having excellent fatigue strength, in machine parts having a composition of, by mass, 0.1 to 1.2% C, and the balance Fe with inevitable impurities, and having a notched part with the radius of curvature of ≤25 mm, the HV hardness of the surface is ≥250, and further, the compressive residual stress of the surface layer in the notched part is -100 to -1,500 MPa, and to provide a method for improving its fatigue strength.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有曲率半径≤25mm的切口部分并且还具有≥250的表面HV硬度的高强度机器部件，并且提供一种提高其疲劳强度的方法。解决方案：关于具有优异的疲劳强度的高强度机器部件，在具有质量为0.1〜1.2％C的组成的机器部件中，余量为Fe的不可避免的杂质，并且具有半径为曲率≤25mm，表面的HV硬度≥250，另外，切口部的表面层的压缩残余应力为-100〜-1500MPa，提供疲劳强度提高的方法。版权所有（C）2006，JPO＆NCIPI

26. 发明专利

JP2006104549A High strength bolt having excellent delayed fracture resistance and method for improving its delayed fracture resistance 有权
$High strength bolt having excellent delayed fracture resistance and method for improving its delayed fracture resistance$
标题翻译：具有优异延迟耐断裂性的高强度螺栓及其延迟抗断裂性的方法
公开(公告)号：JP2006104549A
公开(公告)日：2006-04-20
申请号：JP2004295857
申请日：2004-10-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TARUI TOSHIZO , FUJITA TAKASHI , YOSHIDA TAKU , SENDA TETSUSHI
IPC分类号： C22C38/00 , C21D1/04 , C21D7/04 , C21D9/00 , C22C38/06 , C22C38/38 , F16B35/00
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high strength bolt having satisfactory delayed fracture resistance and having a strength of ≥1,500 MPa, and to provide a method for improving its delayed fracture resistance. SOLUTION: The high strength bolt having excellent delayed fracture resistance is composed of a steel having a composition comprising, by mass, 0.65 to 1.1% C, 0.05 to 2% Si, 0.2 to 2% Mn and 0.002 to 0.1% Al, and the balance Fe with inevitable impurities, and having a tensile strength of ≥1,500 MPa, and in which the compressive residual stress in the surface layer of the under head part in the bolt is 20 to 90% of the tensile strength in the steel. The method for improving its delayed fracture resistance is further provided. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有令人满意的耐延迟断裂性并且具有≥1,500MPa的强度的高强度螺栓，并且提供一种提高其延迟抗断裂性的方法。解决方案：具有优异的耐延迟断裂性的高强度螺栓由具有质量分数为0.65-1.1％，C：0.05-2％Si，0.2-2％Mn和0.002-0.1％Al ，余量为Fe与不可避免的杂质，拉伸强度≥1,500MPa，螺栓底部下表面层的压缩残余应力为钢的拉伸强度的20〜90％。进一步提供了提高其延迟抗断裂性的方法。版权所有（C）2006，JPO＆NCIPI

27. 发明专利

JP2005298916A High strength pc steel bar having excellent hydrogen embrittlement resistance and production method therefor 有权
标题翻译：高强度PC钢棒具有优异的耐腐蚀性及其生产方法
公开(公告)号：JP2005298916A
公开(公告)日：2005-10-27
申请号：JP2004117892
申请日：2004-04-13
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TARUI TOSHIZO , FUJITA TAKASHI , HIRANO KOJI
IPC分类号： B23K26/00 , B23K103/04 , C21D1/09 , C22C38/00 , C22C38/06 , C22C38/58
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high strength PC (prestressed concrete) steel bar having satisfactory hydrogen fatigue resistance and delayed fracture resistance which has satisfactory strength of ≥1,450 MPa. SOLUTION: The steel bar has a composition comprising, by mass, 0.2 to 0.6% C, 0.05 to 3% Si, 0.3 to 2% Mn and 0.002 to 0.1% Al, and, when necessary, comprising one or more kinds of metals selected from 0.05 to 3% Ni, 0.05 to 2% Cr, 0.05 to 2% Mo, 0.02 to 1% V, 0.005 to 0.1% Nb, 0.003 to 0.1% Ti and 0.003 to 0005% B, and the balance Fe with inevitable impurities. Its tensile strength is ≥1,450 MPa, and the residual stress of the surface layer is -100 to -1,200 MPa. In the production method therefor, a PC steel bar is subjected to quenching-tempering treatment, and is thereafter immersed into a liquid, or a liquid film is formed on the steel surface, and laser irradiation in the injection heating value of ≥0.3 J/mm 2 is carried out with a laser having a peak power density of 0.1 to 10 GW/cm 2 . COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有令人满意的耐氢疲劳性和延迟抗断裂性的高强度PC（预应力混凝土）钢筋，其具有令人满意的强度≥1,450MPa。解决方案：钢棒具有以质量计包含0.2-0.6％C，0.05-3％Si，0.3-2％Mn和0.002-0.1％Al的组合物，并且根据需要包含一种或多种的金属，选自0.05〜3％的Ni，0.05〜2％的Cr，0.05〜2％的Mo，0.02〜1％的V，0.005〜0.1％的Nb，0.003〜0.1％的Ti和0.003〜0005％的B，有不可避免的杂质。其拉伸强度≥1,450MPa，表面层的残余应力为-100〜-1200MPa。在其制造方法中，对PC钢棒进行淬火回火处理，然后浸入液体中，或者在钢表面上形成液膜，并且注射热值的激光照射≥0.3J/ 使用峰值功率密度为0.1〜10GW / cm 2的激光进行mm 2 。版权所有（C）2006，JPO＆NCIPI

28. 发明专利

JP2004307929A Bolt having excellent hydrogen embrittlement resistance, and its production method 有权
公开(公告)号：JP2004307929A
公开(公告)日：2004-11-04
申请号：JP2003102930
申请日：2003-04-07
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TARUI TOSHIZO , HIRAGAMI DAISUKE
IPC分类号： C21D8/06 , C21D9/00 , C22C38/00 , C22C38/12 , C22C38/28
摘要： PROBLEM TO BE SOLVED: To provide a high strength bolt which has satisfactory hydrogen fatigue resistance and delayed fracture resistance, and tensile strength of ≥1,600 MPa.
SOLUTION: The bolt having excellent hydrogen embrittlement resistance comprises, by mass, 0.8 to 1.1% C, 0.05 to 2% Si, 0.2 to 2% Mn and 0.2 to 2% V, and the balance Fe with inevitable impurities, has a pearlite structure in which the aspect ratio of pearlite colonies is 1.3 to 4, and has tensile strength of ≥1,600 MPa, and a delayed fracture limit diffusible hydrogen content of ≥0.4 ppm and/or a fatigue limit diffusible hydrogen content of ≥0.7 ppm. In its production method, steel is hot-rolled, thereafter cooled to the temperature range of 550 to 700°C at ≥30°C/s, held to the temperature range for 30 to 300 s to control its tensile strength after pearlite transformation to ≥1,350 MPa, subsequently subjected to wire drawing at a true strain in the range of 0.15 to 0.8, and cold-formed.
COPYRIGHT: (C)2005,JPO&NCIPI

29. 发明专利

JP2012172247A Steel for high strength spring, excellent in hydrogen embrittlement resistance 有权
标题翻译：用于高强度弹簧的钢，具有优异的耐腐蚀性
公开(公告)号：JP2012172247A
公开(公告)日：2012-09-10
申请号：JP2011038250
申请日：2011-02-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TARUI TOSHIZO , SAKAMOTO AKIRA , HIRAGAMI DAISUKE , SENDA TETSUSHI
IPC分类号： C22C38/00 , C22C38/24 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a steel for a high strength spring, high in strength and excellent in hydrogen embrittlement resistance capable of obtaining excellent delayed fracture resistance and corrosion fatigue fracture resistance.SOLUTION: The steel for a high strength spring, excellent in hydrogen embrittlement resistance includes, by mass%, 0.40-0.65% of C, 1.8-3.0% of Si, 0.1-0.5% of Mn, 0.010% or less of P, 0.015% or less of S, 0.5% or less of Cr and 0.01-0.5% of V, with the remainder being Fe and inevitable impurities. In the steel for a high strength spring, a ratio of a maximum concentration of Mn to a minimum concentration of Mn in a region from a surface to a depth of 1 mm is 1.5 or less, and an amount of non-diffusible hydrogen is less than 0.3 ppm.
摘要翻译：要解决的问题：提供一种用于高强度弹簧的钢，强度高，耐氢脆性优异，能够获得优异的延迟断裂性和耐腐蚀疲劳抗断裂性。解决方案：耐氢脆性优良的高强度弹簧用钢，以质量％计含有C：0.40〜6.65％，Si：1.8〜3.0％，Mn：0.1-0.5％，Mn：0.010％以下 P，0.015％以下的S，0.5％以下的Cr和0.01-0.5％的V，余量为Fe和不可避免的杂质。在高强度弹簧用钢中，从表面到深度1mm的区域中，Mn的最大浓度与Mn的最小浓度的比例为1.5以下，非扩散性氢的量少大于0.3ppm。版权所有（C）2012，JPO＆INPIT

30. 发明专利

JP2012117119A Ultrasonic impact processing apparatus for coil spring and method of ultrasonic impact processing for coil spring 有权
标题翻译：用于线圈弹簧的超声冲击加工装置和用于线圈弹簧的超声冲击加工方法
公开(公告)号：JP2012117119A
公开(公告)日：2012-06-21
申请号：JP2010268580
申请日：2010-12-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： FUJITA TAKASHI , TARUI TOSHIZO , NARUMIYA HIROKI
IPC分类号： C21D7/06 , C21D1/04
摘要： PROBLEM TO BE SOLVED: To provide a method of ultrasonic impact processing for a coil spring, reducing processing time while uniformly applying compressive residual stress on an inner circumferential surface of a coil spring and capable of achieving improvement in fatigue characteristics of the coil spring.SOLUTION: In the method of ultrasonic impact processing for a coil spring, a rod-like impact tool 2, which is constituted such that an outer circumferential surface 2a thereof is brought into contact with an inner circumferential surface 4b of a coil spring 4 or the outer circumferential surface 2a is separated from the coil inner circumferential surface 4b with a gap therebetween, is inserted into an coil inside 4a of the coil spring 4, and ultrasonic vibration is applied to the impact tool 2 so that the entire surface of the coil inner circumferential surface 4b is impacted by the outer circumferential surface 2a.
摘要翻译：要解决的问题：为了提供一种用于螺旋弹簧的超声波冲击处理方法，减少了在螺旋弹簧的内周面上均匀地施加压缩残余应力并且能够实现线圈的疲劳特性的改善的加工时间弹簧。解决方案：在螺旋弹簧的超声波冲击加工方法中，杆状冲击工具2构成为使其外周面2a与螺旋弹簧的内周面4b接触 4或外周面2a与线圈内周面4b间隔开的状态被插入到螺旋弹簧4的内部的线圈4a内，超声波振动被施加到冲击工具2的整个表面线圈内周面4b受到外周面2a的冲击。版权所有（C）2012，JPO＆INPIT

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