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1. 发明专利

JP2008156678A High-strength bolt excellent in delayed fracture resistance and corrosion resistance 有权
$High-strength bolt excellent in delayed fracture resistance and corrosion resistance$
标题翻译：高强度螺栓具有延迟抗断裂和耐腐蚀性
公开(公告)号：JP2008156678A
公开(公告)日：2008-07-10
申请号：JP2006344498
申请日：2006-12-21
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MARUTA KEIICHI , KUROSAWA NOBUTAKA , HASE KAZUKUNI , KIMURA HIDETO , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D9/00 , C22C38/14 , C22C38/54 , C22C38/60 , F16B35/00
摘要： PROBLEM TO BE SOLVED: To inexpensively provide a high-strength bolt that suppresses an increase in a production cost, which is caused by adding a large amount of expensive alloying elements such as Mo, Co and V, has excellent delayed fracture resistance and corrosion resistance, is easily worked, and besides, has high strength.
SOLUTION: The high-strength bolt having excellent delayed fracture resistance and corrosion resistance is manufactured by preparing a steel comprising, by mass%, more than 0.15 to 0.30% C, 1.0% or less Si, 1.5% or less Mn, 0.1% or less Ti, 0.3 to 0.5% Mo, and 0.0005 to 0.01% B and the balance Fe with unavoidable impurities, quenching the steel, and then tempering the steel at 100°C to 400°C; thereby acquires a steel structure in which the average diameter of former austenite grains is 10 μm or smaller after having been quenched; and can show a strength in a range of about 1,200 to 1,800 MPa, high workability, high delayed fracture resistance, and corrosion resistance.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题为了廉价地提供抑制由于添加大量昂贵的合金元素如Mo，Co和V而引起的生产成本增加的高强度螺栓，具有优异的延迟断裂抗性耐腐蚀性容易加工，另外具有高强度。解决方案：具有优异的耐延迟断裂性和耐腐蚀性的高强度螺栓通过制备以质量％计含有大于0.15至0.30％的C，1.0％或更少的Si，1.5％或更低的Mn， 0.1％以下的Ti，0.3〜0.5％的Mo和0.0005〜0.01％的B，余量为Fe，不可避免的杂质，淬火钢，然后回火钢在100〜400℃; 从而获得淬火后其前奥氏体晶粒的平均直径为10μm以下的钢结构; 并且能够显示在约1200至1800MPa的范围内的强度，高加工性，高延迟耐断裂性和耐腐蚀性。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2007231344A Steel 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钢及其生产方法
公开(公告)号：JP2007231344A
公开(公告)日：2007-09-13
申请号：JP2006053258
申请日：2006-02-28
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HAYASHI TORU , OMORI YASUHIRO , KUROSAWA NOBUTAKA , KIMURA HIDETO , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D1/10 , C21D8/00 , C21D9/28 , C22C38/60
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a steel as the stock before hardening and a steel having excellent fatigue properties after hardening which is provided with a hardened layer by induction hardening on the surface and suitably applied to an automobile drive shaft, a constant velocity joint or the like, and to provide their production methods. SOLUTION: The steel has a composition comprising, by mass, 0.35 to 0.7% C, ≤1.1% Si, 0.1 to 2.0% Mn, ≤0.25% Al, 0.005 to 0.1% Ti, 0.05 to 0.6% Mo, 0.0003 to 0.006% B, ≤0.10% S, ≤0.03% P and ≤0.2% Cr, and the balance Fe with inevitable impurities, has a base metal structure composed of a bainitic structure and/or a martensitic structure, and in which the total structural fraction of the bainitic structure and the martensitic structure is ≥10%, further, the degree of ruggedness in old austenite grain boundaries in a hardened layer after induction hardening is ≥0.05, and the thickness of the hardened layer is ≥2 mm. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了在硬化前提供作为原料的钢和硬化后具有优异疲劳性能的钢，其在表面上通过感应淬火设置有硬化层，并适用于汽车驱动轴，常数速度接头等，并提供其制造方法。钢的组成包括：C：0.35〜0.7％，Si：0.1.1％，Mn：0.1〜2.0％，Al：0.005〜0.1％，Mo：0.05〜0.6％至0.006％B，≤0.10％S，≤0.03％P和≤0.2％Cr，余量为Fe与不可避免的杂质，具有由贝氏体组织和/或马氏体组织构成的贱金属结构，其中总计贝氏体结构和马氏体组织的结构分数≥10％，而且，淬火后的硬化层的老奥氏体晶界的粗糙度≥0.05，硬化层的厚度≥2mm。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2007231337A Hot rolled steel sheet and steel component 审中-公开
标题翻译：热轧钢板和钢组件
公开(公告)号：JP2007231337A
公开(公告)日：2007-09-13
申请号：JP2006052767
申请日：2006-02-28
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HAYASHI TORU , MATSUZAKI AKIHIRO , KUROSAWA NOBUTAKA , OMORI YASUHIRO , UEI SEISHI , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C22C38/04 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a steel component using a hot rolled steel sheet having more improved fatigue strength compared with the conventional one.
SOLUTION: In the steel component produced using the hot rolled steel sheet, at least a part has a hardened structure by quenching, and the old austenite grain size of the hardened structure is ≤12 μm.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种使用与常规的相比具有更好的疲劳强度的热轧钢板的钢部件。解决方案：在使用热轧钢板制造的钢部件中，至少一部分通过淬火具有硬化结构，并且硬化结构的旧奥氏体晶粒尺寸≤12μm。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2007204796A Method for manufacturing parts for machine structure 有权
标题翻译：制造机械部件的方法
公开(公告)号：JP2007204796A
公开(公告)日：2007-08-16
申请号：JP2006023222
申请日：2006-01-31
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： HAYASHI TORU , OMORI YASUHIRO , KUROSAWA NOBUTAKA , KIMURA HIDETO , TOYOOKA TAKAAKI , YAMADA KATSUMI
IPC分类号： C21D8/00 , C21D1/10 , C21D1/18 , C21D9/00 , C21D9/28 , C21D9/30 , C21D9/40 , C22C38/00 , C22C38/12 , C22C38/58
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing parts for machine structure, in which the fatigue strength is improved more than before. SOLUTION: A steel material having the composition containing 0.3-1.3 mass% C, ≤1.1 mass% Si, ≤2.0 mass% Mn, ≤0.25 mass% Al and 0.05-2.0 mass% Mo and satisfying the following formula (1) C 1/2 (1+0.7Si)(1+3Mn)(1+3.0Mo)>2.0 and the balance Fe with inevitable impurities, is subjected to processing of ≥10% total processing ratio in the temperature range of 800-900°C and successively, processing of ≥10% total processing ratio in the temperature range of 700-500°C, and the cooling to ≤500°C at ≥0.2°C/s average cooling speed in the temperature range of 700-500°C, is applied and thereafter, the temperature raising speed is performed at ≥400°C/s in the temperature range of 600-800°C, and under condition of 800-1050°C heating temperature and ≤5 sec staying time at ≥800°C, an induction-hardening is applied. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种机械结构部件的制造方法，其中疲劳强度比以前提高。解决方案：具有以下组成的钢材：C：≤1.1质量％Si，≤2.0质量％Mn，≤0.25质量％Al和0.05-2.0质量％Mo，满足下式（1））C 1/2 （1 + 0.7Si）（1 + 3Mn）（1 + 3.0Mo）> 2.0，余量为不可避免的杂质，经加工处理总比≥10％在800-900℃的温度范围内，在700-500℃的温度范围内加工总处理比例≥10％，冷却至≤500℃，平均冷却速度≥0.2℃ 在700-500℃的温度范围内，然后在600-800℃的温度范围内和在800-1050℃的加热条件下以≥400℃/ s进行升温速度温度≤500秒时≤5秒的停留时间，应用感应淬火。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JP2007146284A High-strength steel excellent in delayed fracture resistance characteristic and metal bolt 有权
$High-strength steel excellent in delayed fracture resistance characteristic and metal bolt$
标题翻译：高强度钢在延迟断裂韧性特性和金属螺栓
公开(公告)号：JP2007146284A
公开(公告)日：2007-06-14
申请号：JP2006249355
申请日：2006-09-14
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MARUTA KEIICHI , HAYASHI TORU , KUROSAWA NOBUTAKA , HASE KAZUKUNI , KIMURA HIDETO , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D1/10 , C21D6/00 , C21D9/00 , C22C38/14 , C22C38/54 , F16B35/00
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel excellent in delayed fracture resistance characteristics at a low cost without adding a large amount of Ni or an expensive alloying element such as Co or V. SOLUTION: The invention relates to a high-strength steel excellent in delayed fracture resistance characteristics which is characterized by being obtained by subjecting a steel which contains, by mass, C of above 0.30% but 0.50% or below, Si of 1.0% or below, Mn of 1.5% or below, Ti of 0.1% or below, Mo of 0.3 to 0.5%, and B of 0.0005 to 0.01%, with the balance being Fe and unavoidable impurities to hardening and then tempering at 100 to 400° to form a steel structure having a martensite fraction of 90% or above and old austenitic grain diameter of 10 μm or below. It is preferable that the steel further contains by mass one or more components selected from among Al of 1.0% or below, Cr of 2.5% or below, Cu of 1.0% or below, Ni of 2.0% or below, and V of 0.5% or below. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：待解决的问题：为了提供低成本的延迟断裂特性优异的高强度钢，而不添加大量的Ni或昂贵的合金元素如Co或V。解决方案：本发明涉及涉及一种耐延迟断裂特性优异的高强度钢，其特征在于，通过使含有质量分数为0.30％以上且0.50％以下的C以上的钢，1.0％以下的Si，1.5％以下，Ti为0.1％以下，Mo为0.3〜0.5％，B为0.0005〜0.01％，余量由Fe和不可避免的杂质固化，然后在100〜400度下回火，形成具有 90％以上的马氏体分数和10％以下的老奥氏体晶粒直径。优选的是，还含有以下成分中的一种以上的组分：1.0％以下的Al，2.5％以下的Cr，1.0％以下的Cu，2.0％以下的Ni，0.5％以上的V，或以下。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2006161150A Carbon steel for induction hardening and component for machine structure 有权
标题翻译：用于感应硬化的碳钢和机械结构的组件
公开(公告)号：JP2006161150A
公开(公告)日：2006-06-22
申请号：JP2005235967
申请日：2005-08-16
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： YAMADA KATSUMI , SATO KAORU , KUROSAWA NOBUTAKA , OMORI YASUHIRO , HAYASHI TORU , MATSUZAKI AKIHIRO , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D8/06 , C22C38/12 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a carbon steel for induction hardening suitable for obtaining an induction-hardened material having excellent mechanical properties represented by fatigue properties.
SOLUTION: The carbon steel comprises 0.3 to 0.6% C and 0.05 to 0.8% Mo. Since Mo has a tendency to segregation, and, in a stage to induction hardening treatment such as a slab heating stage, there is a need for suppressing the ununiformity in concentration caused by the segregation of Mo and attaining the uniformity of the structure, and the ratio between the maximum value (Imax) and the minimum value (Imin) in the characteristic X-ray intensity of Mo as the index of uniformization, Imax/Imin is controlled to ≤3.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种适用于获得具有由疲劳性能表现的优异机械性能的感应淬火材料的用于感应淬火的碳钢。解决方案：碳钢含有0.3〜0.6％的C和0.05〜0.8％的Mo。由于Mo具有偏析倾向，并且在诸如板坯加热阶段的感应淬火处理阶段，需要抑制由Mo的偏析引起的浓度的不均匀性并获得结构的均匀性，以及作为均匀化指数的Mo的特征X射线强度中的最大值（Imax）与最小值（Imin）之间的比率，Imax / Imin控制在≤3。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2008202068A Component for machine structure 审中-公开
标题翻译：机械结构部件
公开(公告)号：JP2008202068A
公开(公告)日：2008-09-04
申请号：JP2007036743
申请日：2007-02-16
申请人： Jfe Steel Kk , Jfeスチール株式会社 , Nissan Motor Co Ltd , 日産自動車株式会社
发明人： KUROSAWA NOBUTAKA , KIMURA HIDETO , TOYOOKA TAKAAKI , KOGANEZAWA TAIICHI , HAYASHI TAKAO , OKADA YOSHIO
IPC分类号： C22C38/00 , C21D1/10 , C21D1/18 , C21D9/28 , C22C38/60 , F16C3/02
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a component for a machine structure, which has a more excellent torsion-fatigue strength than a conventional one, is represented by an input shaft and an output shaft, and has a vertical hole. SOLUTION: The component for the machine structure is a hollow bar-shaped component 2 that has a vertical hole 3 which penetrates through an outer wall surrounding a hollow center 1 and communicates with the hollow center 1, and that has a hardened layer 4 formed therein which spreads with a diameter L that is 3 times of the diameter of the vertical hole or larger around the vertical hole 3. The hardened layer has a structure formed of former austenite crystal grains with a grain size of 10 μm or smaller, and has the surface layer of which the compressive residual stress is 1,000 MPa or more. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种具有比传统的扭转疲劳强度更优异的机器结构的部件，由输入轴和输出轴表示，并且具有垂直孔。解决方案：机器结构的部件是中空的棒状部件2，其具有垂直孔3，该垂直孔3穿过围绕中空中心1的外壁并与中空中心1连通，并且具有硬化层 4，其直径L为垂直孔的直径的3倍或更大的垂直孔3。该硬化层具有由以下的奥氏体晶粒形成的结构：粒径为10μm以下的奥氏体晶体，并且其表面层的压缩残余应力为1000MPa以上。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2008144270A Non-heat-treated steel for machine structure excellent in fatigue property and toughness, its manufacturing method, component for machine structure, and its manufacturing method 审中-公开
标题翻译：用于机械结构优化的非热处理钢，其疲劳性能和韧性，其制造方法，机械结构部件及其制造方法
公开(公告)号：JP2008144270A
公开(公告)日：2008-06-26
申请号：JP2007293723
申请日：2007-11-12
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： KUROSAWA NOBUTAKA , OMORI YASUHIRO , HAYASHI TORU , MARUTA KEIICHI , KIMURA HIDETO , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D8/06 , C21D9/32 , C22C38/14 , C22C38/60 , F16H55/26
摘要： PROBLEM TO BE SOLVED: To provide a non-heat-treated steel for a machine structure that exhibits an excellent toughness even in a non-heat-treated state, and a favorable manufacturing method thereof.
SOLUTION: The non-heat-treated steel for the machine structure contains 0.35-0.6 mass% C, 1.1 mass% or less Si, 2.0 mass% or less Mn, 0.0005-0.01 mass% B, 0.1 mass% or less Ti, and one or two elements of 1.0 mass% or less Mo and 2.0 mass% or less W, and the balance being Fe and unavoidable impurities, wherein precipitates of B is less than 0.0005 mass%, the hardness is HRC18-32, and the yield ratio is over 0.7.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供即使在非热处理状态下也显示优异韧性的机器结构的非热处理钢及其良好的制造方法。解决方案：用于机器结构的非热处理钢包含C：0.35〜0.6质量％，Si：1.1质量％以下，Si：2.0质量％以下，Mn：0.0005〜0.01质量％，B：0.1质量％以下 Ti和1.0质量％以下的Mo和2.0质量％以下的一种或两种元素，余量为Fe和不可避免的杂质，其中B的析出物小于0.0005质量％，硬度为HRC18-32，和收益率超过0.7。版权所有（C）2008，JPO＆INPIT

9. 发明专利

JP2006028599A Component for machine structure 审中-公开
标题翻译：机械结构部件
公开(公告)号：JP2006028599A
公开(公告)日：2006-02-02
申请号：JP2004210450
申请日：2004-07-16
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MATSUZAKI AKIHIRO , KUROSAWA NOBUTAKA , HAYASHI TORU , OMORI YASUHIRO , TOYOOKA TAKAAKI
IPC分类号： C22C38/00 , C21D8/06 , C21D9/30 , C22C38/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a component for a machine structure whose fatigue strength is improved compared with that of the conventional one.
SOLUTION: Regarding the component for a machine structure in which at least a part comprises a hardened layer by induction hardening, the relation between the average grain size GS (μm) of old austenite grains in the hardened layer and the stress concentration coefficient α in the part subjected to the induction hardening satisfies the inequality GS≤11-2×α (wherein, α≥1.5).
COPYRIGHT: (C)2006,JPO&NCIPI

10. 发明专利

JP2006028598A Steel and steel product having excellent machinability and fatigue property and method for producing them 有权
标题翻译：具有优异机械性能和疲劳性能的钢铁产品及其生产方法
公开(公告)号：JP2006028598A
公开(公告)日：2006-02-02
申请号：JP2004210398
申请日：2004-07-16
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MATSUZAKI AKIHIRO , HAYASHI TORU , OMORI YASUHIRO , TOYOOKA TAKAAKI , KUROSAWA NOBUTAKA , YAMADA KATSUMI
IPC分类号： C22C38/00 , C21D8/00 , C21D9/28 , C22C38/22 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a steel having satisfactory machinability while securing its fatigue strength, and to provide a steel having further improved fatigue strength actually by induction hardening.
SOLUTION: The steel has a composition comprising by mass% that C: 0.3 to 0.7%, Si: 1.1% or less, Mn: 0.2 to 1.1%, Mo: 0.05 to 0.6%, S: 0.06% or less, P: 0.025% or less, Al: 0.25% or less, Cr: 0.3% or less and the balance Fe and inevitable impurities, has a base material structure of ferrite structure and a pearlite structure, wherein the structural fraction of the sum of the ferrite structure and the pearlite structure accounts for 90 volume% or more, and the ferrite structure has the maximum thickness of 30 μm or less.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在确保其疲劳强度的同时具有令人满意的机械加工性的钢，并且通过感应淬火提供具有进一步提高的疲劳强度的钢。钢的组成按质量％计含有C：0.3〜0.7％，Si：1.1％以下，Mn：0.2〜1.1％，Mo：0.05〜0.6％，S：0.06％以下， P：0.025％以下，Al：0.25％以下，Cr：0.3％以下，余量为Fe和不可避免的杂质，具有铁素体结构的基体结构和珠光体组织，其中，铁素体结构和珠光体组织占90体积％以上，铁素体组织的最大厚度为30μm以下。版权所有（C）2006，JPO＆NCIPI

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