公开(公告)号：JP2004027260A

公开(公告)日：2004-01-29

申请号：JP2002182518

申请日：2002-06-24

Applicant: Daido Steel Co Ltd ,  Ntn Corp ,  Ntn株式会社 ,  大同特殊鋼株式会社

Inventor： OKI TSUTOMU ,  MAEDA KIKUO ,  KIMURA TOSHIMITSU ,  KINAMI TOSHIYA

IPC: F16C33/32 ,  C21D1/06 ,  C21D6/00 ,  C21D9/40 ,  C22C38/00 ,  C22C38/38 ,  C23C8/22 ,  C23C8/26 ,  F16C33/34 ,  F16C33/62 ,  F16C33/64

Abstract: PROBLEM TO BE SOLVED: To provide a rolling element of which deformation caused by hardening treatment can be suppressed without remarkably deteriorating characteristics required to be provided as a rolling element such as rolling life fatigue nor reducing production efficiency, and to provide a method of producing the same. SOLUTION: The rolling element consists of a steel member. The steel member has a composition comprising, by mass, 0.1 to 0.8% C, 0.4 to 1.5% Si, 0.3 to 1.8% Mn, 0.5 to 2.0% Cr, 0 to 0.35% Mo, ≤0.050% Al, ≤0.003% Ti, ≤0.0050% O and ≤0.015% N, and in which inequality (1); H COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2009236145A

公开(公告)日：2009-10-15

申请号：JP2008080000

申请日：2008-03-26

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO

IPC: F16C19/38 ,  B21B31/07 ,  C21D1/06 ,  C21D9/36 ,  C21D9/40 ,  C22C38/00 ,  C22C38/04 ,  C22C38/44 ,  F16C33/34 ,  F16C33/62

CPC classification number: F16C19/388 ,  F16C2322/12

Abstract: PROBLEM TO BE SOLVED: To provide a steelmaking equipment rolling bearing having sufficient durability and improved dimensional stability, and also to provide a steelmaking equipment bearing component constituting the rolling bearing, and steelmaking equipment equipped therewith in improved durability. SOLUTION: An outer ring 2, an inner ring 3 and a tapered roller 7 constituting the rolling machine roll neck rolling bearing are each formed of steel which contains 0.7-1.2% carbon, 0.1-1.1% silicon, and 0.25-1.5% manganese, and consists of iron in the rest and impurities. In regions including an outer ring rolling surface 2A, an inner ring rolling surface 3A and a roller rolling surface 7A, an outer ring nitrogen enriched layer 2B, an inner ring nitrogen enriched layer 3B and a roller nitrogen enriched layer 7B are formed, respectively. The outer ring nitrogen enriched layer 2B, the inner ring nitrogen enriched layer 3B and the roller nitrogen enriched layer 7B, each include a bainite structure where a remaining austenite amount is held down to 5 vol% or less. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种具有足够的耐久性和改善的尺寸稳定性的炼钢设备滚动轴承，以及提供构成滚动轴承的炼钢设备轴承部件以及以其提供的耐久性提高的炼钢设备。 构成轧制机辊颈滚动轴承的外圈2，内圈3和圆锥滚子7分别由含有0.7-1.2％碳，0.1-1.1％硅和0.25-1.5％的钢形成 ％锰，其余为铁和杂质。 在包括外圈滚动表面2A，内圈滚动表面3A和滚动滚动表面7A的区域中，分别形成外环富氮层2B，内环富氮层3B和辊氮富集层7B。 外环富氮层2B，内环富氮层3B和辊氮富集层7B各自包括其余奥氏体量保持在5体积％以下的贝氏体组织。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009235445A

公开(公告)日：2009-10-15

申请号：JP2008079996

申请日：2008-03-26

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO

IPC: C21D9/40 ,  C21D1/06 ,  C21D1/20 ,  C22C38/00 ,  C22C38/04 ,  C22C38/44 ,  C23C8/32 ,  F16C19/00 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16C33/64

Abstract: PROBLEM TO BE SOLVED: To provide a method for applying a heat-treatment for a steel by which the restraint of the hardness-lowering in the semi-high temperature atmosphere and the improvements of a dimensional stability and the hardness level can be obtained; a method for manufacturing a machine part, the machine part and a rolling bearing containing this machine part. SOLUTION: This method for applying the heat-treatment for the steel, is provided with; a process for preparing the steel composed of 0.7-1.2 mass% carbon, 0.1-1.1 mass% silicon, 0.25-1.5 mass% manganese and the balance iron with impurities; a process for forming a nitrogen-enriched layer in the range containing the surface of the steel by nitriding at the temperature of ≥A 1 point; and a process for transforming the nitrogen-enriched layer into a bainite so that retained austenite quantity in the nitrogen-enriched layer becomes ≤5vol% by holding the temperature exceeding Ms point of the nitrogen-enriched layer and the temperature ≤ 50°C higher from the Ms point. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种对半导体制冷剂中的硬度降低的限制以及尺寸稳定性和硬度水平的提高进行钢的热处理的方法 获得; 机器部件的制造方法，机器部件和包含该机器部件的滚动轴承。

解决方案：提供用于钢的热处理的方法; 制备由0.7-1.2质量％碳，0.1-1.1质量％硅，0.25-1.5质量％锰和余量的铁与杂质组成的钢的方法; 在≥A 1 点的温度下通过氮化形成含氮表面的范围内的富氮层的方法; 以及将富氮层转化为贝氏体的方法，使得富氮层中的残留奥氏体量通过保持超过富氮层的Ms点和高于50℃的温度而变为≤5vol％ 女士点。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009001847A

公开(公告)日：2009-01-08

申请号：JP2007162877

申请日：2007-06-20

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO

IPC: C22C38/00 ,  C21D1/06 ,  C21D9/40 ,  C22C38/46 ,  C22C38/50 ,  C23C8/22 ,  C23C8/32 ,  F16C33/62

Abstract: PROBLEM TO BE SOLVED: To provide a rolling member and a rolling bearing for a transmission, which exhibit the long life under harsh environments while reducing a content of an alloying element.
SOLUTION: An outer race 11, an inner race 12 and a ball 13 of a deep groove ball bearing 1 for a transmission are made of a steel which comprises 0.3 to 0.4% of carbon, 0.3 to 0.7% of silicon, 0.3 to 0.8% of manganese, 0.5 to 1.2% of nickel, 1.6 to 2.5% of chromium, 0.1 to 0.7% of molybdenum, 0.2 to 0.4% of vanadium and the balance iron with impurities, while keeping a total content of silicon and manganese at 1.0% or less, a total content of nickel and chromium at 2.3% or more and a total content of chromium, molybdenum and vanadium at 3.0% or less; and have a hardened layer formed on their surfaces. The surface layer part of the hardened layer has a hardness of 725 to 800 HV. The maximum particle size of carbides dispersed in the surface layer part is 10 μm or smaller and the area ratio thereof is 7 to 25% or less. The inner part has a hardness of 450 to 650 HV.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于变速器的滚动部件和滚动轴承，其在减少合金元素的含量的同时在恶劣环境下表现出长寿命。 解决方案：用于变速器的深沟球轴承1的外圈11，内圈12和球13由钢，其含有0.3〜0.4％的碳，0.3〜0.7％的硅，0.3 至0.8％的锰，0.5至1.2％的镍，1.6至2.5％的铬，0.1至0.7％的钼，0.2至0.4％的钒和余量的铁与杂质，同时保持硅和锰的总含量 1.0％以下，镍和铬的总含量为2.3％以上，铬，钼，钒的总含量为3.0％以下。 并且在其表面上形成有硬化层。 硬化层的表面层部分的硬度为725〜800HV。 分散在表层部分中的碳化物的最大粒径为10μm以下，面积比为7〜25％以下。 内部部件的硬度为450〜650HV。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008308721A

公开(公告)日：2008-12-25

申请号：JP2007156703

申请日：2007-06-13

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO

IPC: C22C38/00 ,  C21D1/06 ,  C21D9/40 ,  C22C38/46 ,  C23C8/32 ,  F16C19/06 ,  F16C33/32 ,  F16C33/62

Abstract: PROBLEM TO BE SOLVED: To provide a rolling member and a rolling bearing for automotive electrical system/auxiliary machine which exhibit a long life even in a severe environment while suppressing the contents of alloying elements. SOLUTION: The outer race 11, inner race 12 and ball 13 constituting the grease-sealed deep groove ball bearing 1 for automotive electrical system/auxiliary machine are made of a steel which contains 0.3 to 0.4% of carbon, 0.3 to 0.7% of silicon, 0.3 to 0.8% of manganese, 0.5 to 1.2% of nickel, 1.6 to 2.5% of chromium, 0.1 to 0.7% of molybdenum and 0.2 to 0.4% of vanadium with the balance consisting of iron and impurities and in a total content of silicon and manganese of 1.0% or below, a total content of nickel and chromium of 2.3% or above, and a total content of chromium, molybdenum and vanadium of 3.0% or below. Surface hardened layers are formed in the outer race, inner race and ball respectively and the surface hardened layers exhibit hardness of 725 to 800 HV, while the maximum particle size of carbides dispersed in the surface hardened layers is 10 μm or below and the area ratio thereof is 7 to 25%. Further, the inner parts exhibit hardness of 450 to 650 HV. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 解决的问题：提供一种汽车电气系统/辅助机械的滚动部件和滚动轴承，即使在苛刻的环境下，即使在抑制合金元素的含量的情况下也能够使用寿命长。 构成用于汽车电气系统/辅助机器的油脂密封的深沟球轴承1的外圈11，内圈12和球13由含有0.3〜0.4％的碳，0.3〜0.7的钢制成 硅的量为0.3〜0.8％，镍为0.5〜1.2％，铬为1.6〜2.5％，钼为0.1〜0.7％，钒为0.2〜0.4％，余量为铁和杂质 硅和锰的含量为1.0％以下，镍和铬的总含量为2.3％以上，铬，钼，钒的总含量为3.0％以下。 表面硬化层分别形成在外圈，内圈和球中，表面硬化层的硬度为725〜800HV，分散在表面硬化层中的碳化物的最大粒径为10μm以下，面积比 为7〜25％。 此外，内部部件的硬度为450〜650HV。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008207599A

公开(公告)日：2008-09-11

申请号：JP2007043755

申请日：2007-02-23

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO ,  OTSUKI HISASHI

IPC: B60B27/00 ,  B60B35/18 ,  F16C19/18

Abstract: PROBLEM TO BE SOLVED: To provide a wheel bearing device of which the high durability is ensured, by including a part with improved fatigue strength in a non-hardened portion. SOLUTION: A wheel bearing device 1 includes an outer member 10, an inner member 20, and a roller 50. The inner member 20 includes a hub ring 30 made of steel and having a wheel mounting flange 31 formed. The hub ring 30 has a hardened portion 39 hardened to attain at least 50 HRC as a result of quench hardening and a non-hardened portion 33 which is a portion other than the hardened portion 39. A carbide area ratio of steel constituting the non-hardened portion 33 is 10% or less. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：通过在非硬化部分中包括具有改善的疲劳强度的部件来提供确保高耐久性的车轮轴承装置。 解决方案：车轮轴承装置1包括外部构件10，内部构件20和辊50.内部构件20包括由钢制成并具有形成的轮安装法兰31的轮毂环30。 轮毂环30具有硬化部分39，该硬化部分39硬化，由于淬火硬化而达到至少50HRC，而非硬化部分33是除了硬化部分39之外的部分。构成非淬火部分的钢的碳化物面积比 硬化部33为10％以下。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008207589A

公开(公告)日：2008-09-11

申请号：JP2007043598

申请日：2007-02-23

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： OTSUKI HISASHI ,  MAEDA KIKUO

IPC: B60B27/00 ,  B60B35/18 ,  F16C19/18 ,  F16C33/62 ,  F16C33/64 ,  F16C33/78 ,  F16C35/063

CPC classification number: B60B27/0094 ,  B60B27/0005 ,  B60B27/0026 ,  B60B27/0084 ,  F16C19/184 ,  F16C19/186 ,  F16C33/64 ,  F16C35/063 ,  F16C43/04 ,  F16C2240/18 ,  F16C2326/02 ,  Y10T29/49643

Abstract: PROBLEM TO BE SOLVED: To provide a bearing device for a wheel with a hub ring having improved strength and durability under rotationally bent conditions, while reducing its weight without changing the shape and size of a wheel mounting flange and without impairing face deflection, and to provide its manufacturing method. SOLUTION: An outer member 5 or an inner member having at least the wheel mounting flange 10 is air-cooled or refined after forging. Rolling surfaces of both of the outer member 5 and the inner member are hardened by quenching to predetermined surface hardness. The radius of the root of a serration 9 of the hub ring 1, which root is located in a cross-section of a groove bottom arc forming a shape of a cross-section of the groove bottom of the serration 9, is restricted in a range of 0.2-0.8 mm. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种具有轮毂环的轮毂的轴承装置，其在旋转弯曲条件下具有改善的强度和耐久性，同时在不改变轮安装凸缘的形状和尺寸的同时减小其重量并且不损害面部偏转 并提供其制造方法。 解决方案：具有至少轮子安装法兰10的外部构件5或内部构件在锻造之后被空气冷却或精制。 外部构件5和内部构件的滚动表面通过淬火硬化到预定的表面硬度。 轮毂圈1的齿根9的根部的半径位于形成锯齿9的槽底的横截面形状的槽底弧的横截面中，该圆弧的一部分的根部的半径被限制在 范围为0.2-0.8 mm。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2008025010A

公开(公告)日：2008-02-07

申请号：JP2006202013

申请日：2006-07-25

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO

IPC: C22C38/00 ,  C21D1/06 ,  C21D9/40 ,  C22C38/46 ,  C23C8/22 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62

Abstract: PROBLEM TO BE SOLVED: To provide rolling parts which can be used in a high-temperature environment under which hydrogen invades into the steel that forms the rolling parts. SOLUTION: The rolling parts composing a ball bearing 1 with a deep groove are made from a steel comprising 0.3 to 0.4% C, 0.2 to 0.5% Si, 0.3 to 0.8% Mn, 0.5 to 1.2% Ni, 1.6 to 2.5% Cr, 0.1 to 0.7% Mo, 0.3 to 0.8% V and the balance Fe with unavoidable impurities, while keeping the content of V more than that of Mo, the sum of the content of Mo and V 2 times more than that of Si and the sum of the content of Cr, Mo and V at 2.3 to 3.5%. The hardened layer formed on the surface layer part has a hardness of Hv 700 to 780, in which carbides with the maximum particle size of 10 μm or less are distributed so as to occupy 7 to 25% by an area rate and the hardness of the inner part is Hv 500 to 600. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供可以在氢气侵入形成滚动部件的钢的高温环境中使用的滚动部件。 ＆lt; P＆gt;解决方案：构成具有深槽的滚珠轴承1的滚动部件由含有0.3〜0.4％C，0.2〜0.5％Si，0.3〜0.8％Mn，0.5〜1.2％Ni，1.6〜2.5 ％Cr，0.1〜0.7％Mo，0.3〜0.8％V，余量为Fe和不可避免的杂质，同时保持V的含量比Mo多，Mo和V 2的含量之和高于Si的含量 Cr，Mo和V的含量之和为2.3〜3.5％。 形成在表面层部上的硬化层的硬度为700〜780，其中最大粒径为10μm以下的碳化物的面积率分别为7〜25％，硬度为 内部部分为Hv 500至600.版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007327112A

公开(公告)日：2007-12-20

申请号：JP2006160135

申请日：2006-06-08

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： MAEDA KIKUO ,  FUJITA TAKUMI

IPC: C22C38/00 ,  C21D9/28 ,  C21D9/32 ,  C21D9/40 ,  C22C38/04 ,  C22C38/52 ,  F16C33/32 ,  F16C33/64

Abstract: PROBLEM TO BE SOLVED: To provide a machine member and a rolling bearing which have high strength and long service lives even under severe environments while suppressing the increase of manufacturing costs.
SOLUTION: An inner race 12 as the machine member is composed of steel which contains 0.65 to 1.2 mass% carbon in a distribution state which is uniform over the whole of the steel, and the overall inner race is quench-hardened. Moreover, the concentration of solid-solution carbon in an inner race transfer area 12D as a stress-applying part which is a part to be subjected to compressive stress is higher than the concentration of solid-solution carbon in an inner race body part 12E.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了提供即使在恶劣环境下也具有高强度和长使用寿命的机器部件和滚动轴承，同时抑制制造成本的增加。 解决方案：作为机器构件的内圈12由在整个钢中均匀的分布状态下含有0.65〜1.2质量％的碳的钢构成，并且整个内圈进行淬火硬化。 此外，作为作为受压应力的一部分的应力施加部的内圈转移区域12D中的固溶碳的浓度高于内圈体部12E中的固溶碳浓度。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007100128A

公开(公告)日：2007-04-19

申请号：JP2005288017

申请日：2005-09-30

Applicant: Ntn Corp ,  Ntn株式会社

Inventor： HAMADA HIROSHI ,  MATSUBARA YUKIO ,  MAEDA KIKUO

IPC: C22C38/00 ,  B21B31/07 ,  C21D1/06 ,  C21D1/76 ,  C21D9/36 ,  C21D9/40 ,  C22C38/24 ,  F16C13/02 ,  F16C19/28 ,  F16C19/38 ,  F16C33/34 ,  F16C33/62 ,  F16C33/64

Abstract: PROBLEM TO BE SOLVED: To provide a rolling member for rolling bearing for roll-neck in a rolling mill and the rolling bearing for roll-neck in the rolling mill with which rolling fatigue service life under severe circumference, is improved. SOLUTION: In the rolling member for rolling bearing 15 for roll-neck in the rolling mill, an outer ring 2, an inner ring 3 and a tapered roller 17 are composed of a steel containing by mass% of 0.6-1.2% carbon, 0.15-1% silicon, 0.3-1.5% manganese, 0.1-2% chromium, 0.1-2% vanadium, and dispersing vanadium carbides having 50-300nm grain diameter and having ≤12μm average grain diameter in the original austenitic crystal grain. Further, nitrogen-enriched layer is formed in the surface layer part, and the retained austenite quantity in the surface layer part is 20-40 vol%, and the rolling surface of the outer ring, the rolling surface of the inner ring and the outer peripheral surface of the tapered roller 17, have ≥59 HRC hardness. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种轧制机中的轧制用滚动轴承的滚动部件和用于在严重的周长下的轧制疲劳寿命的轧机中的轧辊用滚动轴承。 解决方案：在轧机的滚动轴承用滚动轴承15的滚动部件中，外圈2，内圈3和锥形滚子17由质量％为0.6〜1.2％的钢构成， 碳，0.15-1％硅，0.3-1.5％锰，0.1-2％铬，0.1-2％钒，并且在原奥氏体晶粒中分散具有50-300nm粒径且平均粒径≤12μm的碳化钒。 此外，在表层部形成有富氮层，表层部的残留奥氏体量为20〜40体积％，外圈的滚动面，内圈的滚动面和外圈的滚动面 圆锥滚子17的圆周表面具有≥59HRC硬度。 版权所有（C）2007，JPO＆INPIT