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1. 发明专利

JP2007197772A Transmission shaft superior in torsion fatigue characteristic and manufacturing method therefor 有权
标题翻译：变速器扭矩特性及其制造方法的传动轴
公开(公告)号：JP2007197772A
公开(公告)日：2007-08-09
申请号：JP2006017924
申请日：2006-01-26
申请人： Jfe Steel Kk , Jfeスチール株式会社 , Ntn Corp , Ntn株式会社
发明人： IWAMOTO TAKASHI , TOMITA KUNIKAZU , KIMURA HIDETO , OMORI YASUHIRO , TOYOOKA TAKAAKI , YOSHIDA KAZUHIKO
IPC分类号： C22C38/00 , B21J5/00 , B21K1/14 , C21D1/10 , C21D8/06 , C21D9/28 , C22C38/06 , F16C3/02
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a transmission shaft superior in torsion fatigue characteristics, which has machinability equal to or more excellent than that made from a conventional Pb-added free-cutting steel without necessarily containing a component for free cutting such as Pb and without deteriorating cold and hot forgeability, and besides, uses a machine-structure carbon steel superior in properties after having been nitrided at least in a part. SOLUTION: The transmission shaft has a constant-velocity universal joint in one end of a stub shaft. The stub shaft is made from a steel material which contains a graphite phase in an amount of 5 mass% of the C content or more when the stub shaft is formed, and makes remaining graphite particles and holes originating from graphite, which exist in a surface layer part after the stub shaft has been induction-hardened and tempered, controlled into circle-equivalent diameters of 7 μm or smaller. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种扭转疲劳特性优异的传动轴，该传动轴的切削性等于或优于由常规的Pb添加自由切削钢制成的，而不必包含用于自由切削的部件，例如 Pb并且不劣化冷热锻造，此外，在至少部分被氮化后，使用性能优异的机械结构碳钢。
解决方案：传动轴在短轴的一端具有等速万向接头。短轴由钢材制成，该钢材含有当形成短截线轴时C含量以上5质量％以上的石墨相，并且由表面上存在的剩余石墨粒子和石墨构成的孔短截面轴已经感应淬火和回火，控制在7μm或更小的圆当量直径。版权所有（C）2007，JPO＆INPIT

2. 发明专利

JP2007197771A Constant-velocity universal joint excellent in rolling fatigue characteristic, and manufacturing method therefor 有权
标题翻译：恒定速度通用联轴器在滚动疲劳特性方面优于其制造方法
公开(公告)号：JP2007197771A
公开(公告)日：2007-08-09
申请号：JP2006017826
申请日：2006-01-26
申请人： Jfe Steel Kk , Jfeスチール株式会社 , Ntn Corp , Ntn株式会社
发明人： IWAMOTO TAKASHI , TOMITA KUNIKAZU , KIMURA HIDETO , OMORI YASUHIRO , TOYOOKA TAKAAKI , YOSHIDA KAZUHIKO
IPC分类号： C22C38/00 , C21D1/10 , C21D6/00 , C21D8/00 , C21D9/40 , C22C38/06 , F16D3/205 , F16D3/2237
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a constant-velocity universal joint excellent in rolling fatigue characteristics, which has machinability equal to or more excellent than that made from a conventional Pb-added free-cutting steel without necessarily containing a free-cutting constituent such as Pb and without deteriorating cold and hot forgeability, and besides, uses a machine-structure carbon steel superior in properties after having been nitrided at least in a part.
SOLUTION: The constant-velocity universal joint is provided with an outer member having a plurality of guide grooves in an inner circumference, an inner member having a plurality of guide grooves in an outer circumference, torque transmission balls arranged in a plurality of ball tracks respectively which are formed in the guide grooves of the outer member and the inner member, and a holder for holding these torque transmission balls. The outer member and the inner member are made from a steel material which contains a graphite phase in an amount of 5 mass% of the C content or more when the members are formed, and make remaining graphite particles and holes originating from graphite, which exist in an surface layer part after the members have been induction-hardened and tempered, controlled into circle-equivalent diameters of 7 μm or smaller.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种具有优异的轧制疲劳特性的等速万向接头，其切削性等于或优于常规的Pb添加自由切削钢制成的，而不必包含自由切削 Pb等成分，没有劣化的热和热锻造性，而且至少在一部分被氮化后，使用性能优异的机械结构碳钢。解决方案：等速万向接头设置有在内周具有多个引导槽的外部构件，在外周具有多个引导槽的内部构件，设置在多个引导槽中的扭矩传递滚珠球形轨道分别形成在外部构件和内部构件的引导槽中，以及保持器，用于保持这些扭矩传递球。外部构件和内部构件由形成有构件的C含量以上的5质量％以上的石墨相的钢材制成，并且使剩余的石墨颗粒和源自石墨的空穴存在在构件被感应硬化和回火之后的表面层部分中，被控制为7μm或更小的圆当量直径。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2008088484A Steel component for bearing having excellent fatigue property, and its production method 审中-公开
标题翻译：具有优异的疲劳性能的轴承钢组件及其生产方法
公开(公告)号：JP2008088484A
公开(公告)日：2008-04-17
申请号：JP2006268992
申请日：2006-09-29
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HIRAI YASUMASA , TOMITA KUNIKAZU , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D8/06 , C21D9/40 , C22C38/18 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a bearing steel component whose rolling fatigue life is improved compared with the conventional one.
SOLUTION: The steel component for a bearing having excellent fatigue properties is composed of a steel stock having a componential composition comprising, by mass, 0.6 to 1.5% C, 0.1 to 1.0% Si, 0.1 to 1.5% Mn and 0.05 to 2.0% Cr, and the balance Fe with inevitable impurities, and in which the expected maximum diameter of inclusions in the steel is ≤8 μm, and also, the average retained austenite grain diameter in the quenched surface layer part after quenching is ≤3.5 μm.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供与传统的滚动疲劳寿命相比提高滚动疲劳寿命的轴承钢部件。解决方案：具有优异的疲劳性能的轴承用钢构件由具有以质量计含有0.6〜1.5％C，0.1〜1.0％Si，0.1〜1.5％Mn和0.05〜 2.0％Cr，余量为Fe与不可避免的杂质，其中钢中夹杂物的预期最大直径≤8μm，淬火表面层部淬火后的平均残留奥氏体晶粒直径≤3.5μm 。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2007297677A Steel component for bearing with excellent fatigue characteristic 审中-公开
标题翻译：用于轴承的钢构件具有优异的疲劳特性
公开(公告)号：JP2007297677A
公开(公告)日：2007-11-15
申请号：JP2006126776
申请日：2006-04-28
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HIRAI YASUMASA , TOMITA KUNIKAZU , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D8/06 , C21D9/40 , C22C38/18 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a steel component for a bearing which has rolling fatigue life more improved than before.
SOLUTION: The steel component has a composition consisting of, by mass, 0.6 to 1.5% C, 0.1 to 1.0% Si, 0.1 to 1.5% Mn, 0.05 to 2.0% Cr and the balance Fe with inevitable impurities and also has a former austenite grain size distribution in which the average diameter of former austenite grains in the surface layer part of a hardened layer after quenching is ≤3.5 μm and the maximum diameter of the former austenite grains is ≤2.7 times the average diameter of the former austenite grains.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有比以前更加改善的滚动疲劳寿命的轴承用钢构件。解决方案：钢组分具有质量分数为0.6〜1.5％，Si：0.1〜1.0％，Mn：0.1〜1.5％，Cr：0.05〜2.0％，Fe：不可避免的杂质，前奥氏体晶粒度分布，其中淬火后的硬化层的表面层部分中的前奥氏体晶粒的平均直径≤3.5μm，前奥氏体晶粒的最大直径为前奥氏体的平均直径的2.5倍谷物。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2007231345A Steel component for bearing and its manufacturing method 审中-公开
标题翻译：用于轴承的钢构件及其制造方法
公开(公告)号：JP2007231345A
公开(公告)日：2007-09-13
申请号：JP2006053325
申请日：2006-02-28
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HIRAI YASUMASA , MARUTA KEIICHI , TOMITA KUNIKAZU , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D6/00 , C21D9/36 , C21D9/40 , C22C38/18 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To improve the fatigue characteristics of steel components for bearing to which hardening treatment is applied and which can be suitably used for bearing inner and outer rings, bearing balls, etc.
SOLUTION: The steel components for bearing are constituted by using a steel stock which has a composition consisting of, by mass, 0.6 to 1.5% C, 0.1 to 1.0% Si, 0.1 to 1.5% Mn, ≤0.1% Al, 0.05 to 2.0% Cr and the balance Fe with inevitable impurities. Hardening treatment is applied to the steel stock in which, when the number of carbides in the steel is arranged using a histogram at a pitch of 0.2 μm grain size, a frequency rate is ≤0.28 over the whole grain size range. The old austenite grain size in a hardened surface layer part after the hardening treatment is made to ≤3.5 μm.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提高应用硬化处理的轴承用钢构件的疲劳特性，适用于轴承内圈和外圈，轴承球等。解决方案：钢构件通过使用具有由质量分数为0.6〜1.5％，0.1〜1.0％的Si，0.1〜1.5％的Mn，≤0.1％的Al，0.05〜2.0％的Cr组成的钢材构成的钢坯，铁与不可避免的杂质。对钢坯进行硬化处理，其中，使用直径为0.2μm的粒径的直方图配置钢中的碳化物数，在整个晶粒尺寸范围内的频率为≤0.28。硬化处理后的硬化面层部分的老奥氏体晶粒尺寸为≤3.5μm。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2007204803A Steel parts for bearing, and manufacturing method therefor 审中-公开
标题翻译：用于轴承的钢件及其制造方法
公开(公告)号：JP2007204803A
公开(公告)日：2007-08-16
申请号：JP2006023751
申请日：2006-01-31
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HIRAI YASUMASA , TOMITA KUNIKAZU , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D1/18 , C21D1/32 , C21D9/40 , C22C38/18 , C22C38/60 , F16C33/32 , F16C33/62 , F16C33/64
摘要： PROBLEM TO BE SOLVED: To provide steel parts for a bearing, which are subjected to quenching treatment suitable for inner rings, outer rings and balls of the bearing and the like, and have improved fatigue characteristics.
SOLUTION: A base steel material for the steel parts has a composition comprising 0.6-1.5 mass% C, 0.1-1.0 mass% Si, 0.1-1.5 mass% Mn, 0.1 mass% or less Al, 0.05-2.0 mass% Cr, and the balance Fe with unavoidable impurities. The manufacturing method comprises the steps of: spheroidizing carbides in the base steel material; then working it at a working rate of 20% or more; and subsequently quenching it so that the former austenite grains in the quenched surface layer shall have a diameter of 3.5 μm or smaller.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供适用于轴承的内圈，外圈和滚珠等的淬火处理的轴承用钢件，并且具有改善的疲劳特性。钢部件用钢基材的组成为：含有0.6〜1.5质量％的C，0.1〜1.0质量％的Si，0.1〜1.5质量％的Mn，0.1质量％以下的Al，0.05〜2.0质量％ Cr，余量为Fe与不可避免的杂质。该制造方法包括以下步骤：将基体钢材中的碳化物球化; 然后以20％以上的工作率工作; 然后淬火，使淬火表面层中的前奥氏体晶粒的直径为3.5μm以下。版权所有（C）2007，JPO＆INPIT

7. 发明专利

JP2007197801A Hot-rolled non-thermally refined bar steel having excellent toughness and manufacturing method therefor 有权
标题翻译：具有优异韧性的热轧非热精炼钢铁及其制造方法
公开(公告)号：JP2007197801A
公开(公告)日：2007-08-09
申请号：JP2006020070
申请日：2006-01-30
申请人： Jfe Bars & Shapes Corp , Jfe Steel Kk , Jfeスチール株式会社 , Jfe条鋼株式会社
发明人： TOMITA KUNIKAZU , TOYOOKA TAKAAKI , FUKUOKA KAZUAKI , SHIRAGAMI TETSUO
IPC分类号： C22C38/00 , B21B1/16 , C21D8/06 , C22C38/14 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a hot-rolled non-thermally refined bar steel capable of stably obtaining a tensile strength of ≥700 Mpa and an impact value
U E20 of ≥100 J/cm
2 , and to provide a manufacturing method therefor.
SOLUTION: The hot-rolled non-thermally refined bar steel has a componential composition comprising, by mass, 0.040 to 0.150% C, ≤0.5% Si, 0.5 to 3.0% Mn, ≤0.1% Al, 0.03 to 0.35% Ti and 0.05 to 0.8% Mo, and the balance Fe with inevitable impurities, in which the segregation ratio R of Mn is ≤1.5, the structure is composed of a ferrite single phase with a crystal grain size of ≤35 μm, and fine precipitates with a grain size of
摘要翻译：要解决的问题：提供能够稳定地获得≥700Mpa的抗拉强度和≥100J/ cm的冲击值 U E20的热轧非热精炼钢筋钢 2 ，并提供其制造方法。解决方案：热轧非热精炼钢坯具有以质量计含有0.040〜0.150％的C，≤0.5％的Si，0.5〜3.0％的Mn，≤0.1％的Al，0.03〜0.35％的Al， Ti和0.05〜0.8％Mo，余量为Fe与不可避免的杂质，Mn的偏析比R为≤1.5，结构由晶粒尺寸≤35μm的铁素体单相组成，微细析出物具有<10nm的粒度分散在铁素体中。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2006104556A High strength-high ductility wire rod having hyperfine grain structure and production method therefor 有权
标题翻译：具有高品质谷粒结构的高强度高强度线材及其生产方法
公开(公告)号：JP2006104556A
公开(公告)日：2006-04-20
申请号：JP2004296172
申请日：2004-10-08
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： TOMITA KUNIKAZU , TOYOOKA TAKAAKI , SAITO YOSHIHIRO , HIRANO TOMOSUKE
IPC分类号： C22C38/00 , C21D8/06 , C22C38/06
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high strength-high ductility wire rod having a tensile strength of ≥700 MPa and a reduction of an area of ≥73% by a method applicable to actual commercial production without so changing the conventional production process using a common low carbon steel having sufficient recycling properties. SOLUTION: A steel comprising fine martensite of ≥80% obtained by subjecting a common low carbon steel to thermomechanical treatment to thereby refine the average austenite grain size to ≤50 μm, and thereafter performing water cooling, is subjected to cold wire drawing under the condition satisfying the total reduction of area of 20 to COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过适用于实际的商业生产的方法来提供抗拉强度≥700MPa的高强度高延展性线材并且减少面积≥73％的方法，而不改变常规生产使用具有足够回收性能的普通低碳钢的方法。解决方案：通过对普通低碳钢进行热机械处理从而将平均奥氏体晶粒度细化至≤50μm，然后进行水冷而获得的含有≥80％的细马氏体的钢经受冷拉丝在满足20〜60％的总面积的条件下进行退火，得到平均结晶粒径≤1μm的超细晶粒铁素体组织。版权所有（C）2006，JPO＆NCIPI

9. 发明专利

JP2005120432A Method for manufacturing wire or bar having excellent cold forging property 审中-公开
标题翻译：用于制造具有优良冷锻性能的线或棒的方法
公开(公告)号：JP2005120432A
公开(公告)日：2005-05-12
申请号：JP2003357071
申请日：2003-10-16
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MARUTA KEIICHI , TOMITA KUNIKAZU , TOYOOKA TAKAAKI , HARA KOJI , SAKAMOTO TOSHIO
IPC分类号： B21B1/16 , B21B3/00 , C21D8/06 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a wire or a bar having excellent cold forging property in which carbide can be sufficiently, uniformly and easily spheroidized in a hot rolling line.
SOLUTION: After performing the finish rolling out of the hot rolling so that the finish rolling reduction rate of area is ≥ 15% in the temperature range of ≥ Ar
1 -200°C and ≤ Ar
1 +100°C, steel after the finish rolling is once cooled to the temperature range of ≤ Ar
1 , re-heated to the temperature range of ≥ Ac
1 and ≤ Ac
3 or Acm, and, then, cooled to the cooling stop temperature of ≤ 600°C at a cooling rate of ≤ 0.05°C/s.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种制造具有优异的冷锻性能的线材或棒材的方法，其中碳化物可以在热轧生产线中充分均匀且容易地球化。
解决方案：在进行热轧精轧后，在≥Ar 1 -200℃的温度范围内，面精轧压下率为≥15％，≤Ar ＆lt; SB＆gt; 1＆lt; SB＆gt; + 100℃下，精轧后的钢一度冷却至≤Ar 1 的温度范围，再加热到≥Ac 1 和≤Ac 3 或Acm，然后以≤0.05℃/ s的冷却速率冷却至≤600℃的冷却停止温度。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JP2004043978A High tensile strength steel sheet having excellent workability, and production method and working method therefor 审中-公开
公开(公告)号：JP2004043978A
公开(公告)日：2004-02-12
申请号：JP2003324865
申请日：2003-09-17
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： SHIOZAKI TAKESHI , FUNAKAWA YOSHIMASA , SAITO TAKANOBU , MAEDA EIJI , YAMAMOTO TETSUO , MURAO YASUHIRO , TOMITA KUNIKAZU , YAMASHITA TAKASHI , MASUMOTO HIROSHI
IPC分类号： C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high tensile strength steel sheet which is excellent in both a stretch and stretch flanging properties as indexes of workability, and to provide a production method and a working method therefor.
SOLUTION: The steel sheet has a substantially ferritic single phase structure, and in which Ti and Mo-containing precipitates are dispersedly precipitated in the range satisfying Mo/(Ti+Mo)≥0.25 by atomic%. The steel sheet has a tensile strength of ≥590 MPa.
COPYRIGHT: (C)2004,JPO

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