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1. 发明专利

JP2004162161A Mechanical part and method for producing the same 有权
公开(公告)号：JP2004162161A
公开(公告)日：2004-06-10
申请号：JP2003037802
申请日：2003-02-17
申请人： Daido Steel Co Ltd , Honda Motor Co Ltd , 大同特殊鋼株式会社 , 本田技研工業株式会社
发明人： INOUE KOICHIRO , KUREBAYASHI YUTAKA , MATSUMURA KOJI , MATSUDA HIDEKI , TAKASHIMA MITSUO
IPC分类号： C21D1/06 , C21D9/30 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/58 , C22C38/60 , C23C8/26 , C23C8/50
CPC分类号： C22C38/42 , C21D1/06 , C22C38/02 , C22C38/04 , C23C8/26 , C23C8/50
摘要： PROBLEM TO BE SOLVED: To provide a mechanical part made from steel, surface-hardened by nitriding, and being excellent in strengths and easiness in correcting bend and to provide a method for producing the same.
SOLUTION: The mechanical part 1 made from steel and surface-hardened by nitriding has a surface layer part 2 improved in its surface hardness by the nitriding and an inner layer part 3 exhibiting a substantially constant hardness not affected by the nitriding. The Vickers hardness of the inner layer part 3 is 190 to 260 HV. In the surface layer part 2, the Vickers hardness in the reference position 50 μm deep from the surface of the member is 340 to 460 HV. The depth of an effective hardened layer having a Vickers hardness of 270 HV is at least 0.3 mm deep from the surface 4 of the member.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2007177309A Crankshaft and method for producing the same 审中-公开
标题翻译：制动器及其制造方法
公开(公告)号：JP2007177309A
公开(公告)日：2007-07-12
申请号：JP2005379202
申请日：2005-12-28
申请人： Daido Steel Co Ltd , Honda Motor Co Ltd , 大同特殊鋼株式会社 , 本田技研工業株式会社
发明人： MIZUNO YOSHIKI , MATSUDA HIDEKI , KOBAYASHI SEIJI , HIRAOKA YASUSHI , TAKADA KATSUNORI , KUREBAYASHI YUTAKA
IPC分类号： C22C38/00 , C21D1/06 , C21D9/30 , C22C38/16 , C22C38/60 , F16C3/08
摘要： PROBLEM TO BE SOLVED: To provide a crankshaft which can exhibit both excellent machinability and high fatigue strength though it has a soft-nitrided surface.
SOLUTION: The crankshaft is composed of a steel with a nitrided or soft-nitrided surface. The steel comprises, as alloying elements, 0.07 to 0.12 mass% C, 0.05 to 0.25 mass% Si, 0.1 to 0.5 mass% Mn, 0.8 to 1.5 mass% Cu, 2.4 to 4.5 mass% Ni, 0.8 to 1.5 mass% Al, 0.5 to 1.5 mass% Ti, with the balance being Fe and unavoidable impurities. When the core part of the steel not affected by the nitriding is subjected to a solution treatment at 1,200°C for 1 hour and then cooled at a cooling rate of 0.3 to 1.5°C/sec in a temperature range of 900 to 300°C, the steel exhibits a bainite content of 80% or higher and a Vickers hardness of 180 to 280 Hv.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种曲轴，其可以表现出优异的机械加工性和高疲劳强度，尽管它具有软氮化表面。
解决方案：曲轴由具有氮化或软氮化表面的钢组成。作为合金元素，含有0.07〜0.12质量％的C，0.05〜0.25质量％的Si，0.1〜0.5质量％的Mn，0.8〜1.5质量％的Cu，2.4〜4.5质量％的Ni，0.8〜1.5质量％的Al， 0.5〜1.5质量％的Ti，余量为Fe和不可避免的杂质。当不受氮化影响的钢的核心部分在1,200℃下进行1小时的固溶处理，然后在900〜300℃的温度范围内以0.3〜1.5℃/秒的冷却速度进行冷却，钢的贝氏体含量为80％以上，维氏硬度为180〜280Hv。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2006292108A Crank shaft and its manufacturing method 审中-公开
标题翻译：起重机及其制造方法
公开(公告)号：JP2006292108A
公开(公告)日：2006-10-26
申请号：JP2005115132
申请日：2005-04-12
申请人： Daido Steel Co Ltd , Honda Motor Co Ltd , 大同特殊鋼株式会社 , 本田技研工業株式会社
发明人： KIMURA KAZUYOSHI , TAKADA KATSUNORI , KUREBAYASHI YUTAKA , MIZUNO YOSHIKI , MATSUDA HIDEKI , KOBAYASHI SEIJI
IPC分类号： F16C3/06 , C21D1/06 , C21D1/10 , C21D9/30 , C22C38/00 , C22C38/40 , C22C38/60 , C23C8/32 , C23C8/56
CPC分类号： Y02P10/253
摘要： PROBLEM TO BE SOLVED: To provide a crank shaft having manufacturing performance similar to or higher than that of a case of using a conventional material, although it is nitrocarburized on its surface, and also having high fatigue strength. SOLUTION: In this crank shaft having a pin portion and a journal portion composed of steel having the nitrocarburized surface, a surface quenched-layer in which a quench-induced martensite phase and a strain-induced martensite phase formed by transforming residual austenite phase into martensite phase in creating the quench-induced martensite phase by plastic forming are mixed, is formed on the nitrocarburized steel surface layer portion constituting the pin portion and the journal portion. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有与使用常规材料的情况相似或更高的制造性能的曲轴，尽管其表面上被氮碳共渗，并且还具有高的疲劳强度。解决方案：在具有销部分的曲轴和由具有氮碳共渗表面的钢组成的轴颈部分的曲轴中，表面淬火层通过转变残余奥氏体而形成淬火诱导马氏体相和应变诱发马氏体相在构成销部分和轴颈部分的氮碳共渗钢表面层上形成通过塑性成形产生淬火诱导马氏体相的马氏体相进入马氏体相。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2006291310A Crankshaft and producing method therefor 审中-公开
标题翻译：起重机及其生产方法
公开(公告)号：JP2006291310A
公开(公告)日：2006-10-26
申请号：JP2005115112
申请日：2005-04-12
申请人： Daido Steel Co Ltd , Honda Motor Co Ltd , 大同特殊鋼株式会社 , 本田技研工業株式会社
发明人： TAKEUCHI HISATO , TAKADA KATSUNORI , KUREBAYASHI YUTAKA , MIZUNO YOSHIKI , MATSUDA HIDEKI , KOBAYASHI SEIJI
IPC分类号： C21D9/30 , C21D1/06 , C22C38/00 , C22C38/24 , C22C38/60 , C23C8/26 , F16C3/06
CPC分类号： C23C8/32 , C23C8/02
摘要： PROBLEM TO BE SOLVED: To provide a crankshaft having both of machinability and high fatigue strength.
SOLUTION: In the crankshaft made of a steel, a soft-nitriding treatment is applied on the steel surface and the steel contains as alloy components, by mass%, 0.10-0.30% C, 0.05-0.3% Si, 0.5-1.5% Mn, 0.8-2.0% Mo, 0.1-1.0% Cr, 0.1-0.5% V and the balance Fe with inevitable impurities. Then, when the steel sample picked up from the center part is cooled so that the cooling rate to 900-300°C becomes 0.5°C/second after austenizing at 1,200°C for 1 hr, the ratio of bainite occupying the structure is ≥80% and Vickers hardness measured at the cross section is 260-330 Hv and the surface hardness in the soft-nitriding layer is ≥650 Hv and the whole hardened layer depth is ≥0.3 mm and the hardness of the core part is ≥340 Hv.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有可加工性和高疲劳强度的曲轴。解决方案：在钢制曲轴中，对钢表面进行软氮化处理，钢以质量％计含有0.10〜0.30％的C，0.05〜0.3％的Si，0.5〜 1.5％Mn，0.8-2.0％Mo，0.1-1.0％Cr，0.1-0.5％V，余量为Fe和不可避免的杂质。然后，将从中心部取出的钢样品进行冷却，使得在1200℃下奥氏体化1小时后，900-300℃的冷却速度为0.5℃/秒，占据结构的贝氏体比为≥ 80％，维氏硬度为260-330 Hv，软氮化层表面硬度≥650Hv，整个硬化层深度≥0.3mm，芯部硬度≥340Hv 。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JP2004218007A Steel for machine structure 审中-公开
公开(公告)号：JP2004218007A
公开(公告)日：2004-08-05
申请号：JP2003007120
申请日：2003-01-15
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： KUREBAYASHI YUTAKA
IPC分类号： C22C38/00 , C22C38/14 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To provide a steel for a machine structure which has improved cold workability and machinability without deteriorating its strength such as fatigue strength and impact strength. SOLUTION: The steel for a machine structure has a composition comprising, by mass, 0.10 to 0.70% C, 0.05 to 1.00% Si, 0.30 to 1.50% Mn, 0.010 to 0.130% S, 0.0005 to 0.025% N and 0.0006 to 0.0020% N, and further comprising one or more kinds of metals selected from 0.002 to 0.015% Ti, 0.002 to 0.015% Zr, 0.002 to 0.015% Nb, 0.005 to 0.030% Hf and 0.005 to 0.030% Ta, and the balance Fe with inevitable impurities. The maximum length of MnS present in the steel is controlled to ≤100 μm, and the number of MnS with a length of ≥2 μm present in the unit area is controlled to ≥2,000 pieces/mm 2 . COPYRIGHT: (C)2004,JPO&NCIPI

6. 发明专利

JP2003055735A Free-cutting steel for machine structure having excellent machinability by super-hardened tool 有权
标题翻译：超硬工具机械结构优质自由切割钢
公开(公告)号：JP2003055735A
公开(公告)日：2003-02-26
申请号：JP2001356402
申请日：2001-11-21
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： KANO TAKASHI , KUREBAYASHI YUTAKA
IPC分类号： C21C7/00 , C21C7/04 , C21C7/10 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/60
CPC分类号： C22C38/002 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide free-cutting steel for a machine structure which can always obtain desired machinability, in particular, machinability by a super-hardened tool, and a production method therefor.
SOLUTION: An alloy having a composition containing, by weight, 0.05 to 0.8% C, 0.01 to 2.5% Si, 0.1 to 3.5% Mn and 0.0005 to 0.01% O, and the balance Fe with inevitable impurities is melted by refining similarly to that in the ordinary production of steel for a machine structure. In this case, S, Al and Ca are added so that the compositional ranges of 0.01 to 0.2% S, 0.001 to 0.020% Al and 0.0005 to 0.02% Ca, and the following conditions of [S]/[O]: 8 to 40, [Ca]×[S]: 1×10
-5 to 1×10
-3 , [Ca]/[S]: 0.01 to 20, and [Al]: 0.001 to 0.020% are satisfied, with which the steel in which the occupancy ratio of sulfide inclusions containing ≥1.0% Ca and present in contact with oxide inclusions containing 8 to 62% CaO is ≥2.0×10
-4 mm
2 per the field area of 3.5 mm
2 is obtained.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种能够始终获得期望的机加工性，特别是通过超硬工具的机械加工性的机器结构的自由切削钢及其制造方法。解决方案：一种合金，其组合物含有0.05-0.8％的C，0.01-2.5％的Si，0.1到3.5％的Mn和0.0005到0.01％的O，余量的Fe与不可避免的杂质通过类似于在普通钢材生产中用于机器结构。在这种情况下，添加S，Al和Ca，使得组成范围为0.01〜0.2％S，0.001〜0.020％Al，0.0005〜0.02％Ca，以及[S] / [O]：8〜 40，[Ca]×[S]：1×10 -5〜1×10 -3，[Ca] / [S]：0.01〜20，[Al]：0.001〜0.020％其中含有> = 1.0％Ca并且与含有8至62％CaO的氧化物夹杂物接触的硫化物夹杂物的占有率的钢的面积> = 2.0×10 -4 mm 2 3.5mm 2。

7. 发明专利

JP2011074427A Hollow drill steel rod 审中-公开
标题翻译：中空钻机钢丝绳
公开(公告)号：JP2011074427A
公开(公告)日：2011-04-14
申请号：JP2009225082
申请日：2009-09-29
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： KUREBAYASHI YUTAKA , TAKAHATA NORITAKA
IPC分类号： C22C38/00 , B25D17/00 , C21D8/00 , C22C38/46 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a hollow drill steel rod, which is manufactured at a low cost and has a stem portion having high strength and high toughness for bending.
SOLUTION: The hollow drill steel rod 10 has a composition containing, by mass%, 0.35-0.60% C, 0.35-0.70% Si, 0.40-1.00% Mn, 0.10-1.00% Ni, 0.80-2.00% Cr, 0.40-3.00% Mo, 0.10-0.30% V while satisfying following expression 1 of 7.5≤(1.5 C+1.2 Si+2.1 Mn+1.7 Ni+1.0 Cr+5.5 Mo)
摘要翻译：要解决的问题：提供一种以低成本制造的具有高强度和高韧性用于弯曲的杆部的空心钻杆钢杆。解决方案：中空钻钢杆10具有以质量％计含有0.35-0.60％C，0.35-0.70％Si，0.40-1.00％Mn，0.10-1.00％Ni，0.80-2.00％Cr， 0.40〜0.001％Mo，0.10〜0.30％V，同时满足7.5≤（1.5 C + 1.2 Si + 2.1 Mn + 1.7 Ni + 1.0 Cr + 5.5 Mo）<20的以下表达式1（表达式中的元素符号表示内容相应元素质量％），余量为不可避免杂质的Fe; 并且通过在整个长度上进行淬火和回火处理，具有控制硬度从而满足35≤HRC≤45的阀杆部分，并且该结构主要由贝氏体形成。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2003342671A High strength non-heat treated steel capable of rupturing separation and its intermediate product 有权
标题翻译：高强度非热处理钢可拆卸分离及其中间产品
公开(公告)号：JP2003342671A
公开(公告)日：2003-12-03
申请号：JP2002156256
申请日：2002-05-29
申请人： Daido Steel Co Ltd , Fuji Heavy Ind Ltd , 大同特殊鋼株式会社 , 富士重工業株式会社
发明人： INOUE KOICHIRO , KUREBAYASHI YUTAKA , SHINTANI SHOHEI
IPC分类号： B21J5/00 , B21K1/14 , C22C38/00 , C22C38/58 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a high strength non-heat treated steel suitable as a raw material for a connecting rod capable of being easily subjected to rupturing separation processing, capable of lowering a machining cost, having high strength and excellent workability, having appropriate unevenness on the fracture surface generated by the rupturing separation and capable of keeping high precision after re-assembling after separation.
SOLUTION: The non-heat treated steel subjected to the rupturing separation processing has a composition containing, by wt.%, 0.15-0.25% C, 0.1-1.5% Si, 0.5-1.8% Mn, 0.03-0.15% S, 0.03-0.15 P, 0.01-0.5% Cu, 0.01-0.5% Ni, 0.01-1% Cr, 0.1-0.4% V, 0.001-0.01% s-Al, 0.005-0.035 N, 0.0001-0.01% Ca, 0.001-0.01% O and the balance being Fe and unavoidable impurities.
COPYRIGHT: (C)2004,JPO
摘要翻译：解决的问题：为了提供适合于能够容易地进行破裂分离处理的连杆的原料的高强度非热处理钢，能够降低加工成本，具有高强度和优异的加工性在破裂分离产生的断裂面上具有适当的不均匀性，能够在分离后重新组装后保持高精度。解决方案：进行破裂分离处理的非热处理钢具有以重量％计含有0.15-0.25％C，0.1-1.5％Si，0.5-1.8％Mn，0.03-0.15％S ，0.03-0.15P，0.01-0.5％Cu，0.01-0.5％Ni，0.01-1％Cr，0.1-0.4％V，0.001-0.01％s-Al，0.005-0.035N，0.0001-0.01％Ca，0.001 -0.01％O，余量为Fe和不可避免的杂质。版权所有（C）2004，JPO

9. 发明专利

JP2003300156A Grinding performance evaluating method 审中-公开
标题翻译：研磨性能评估方法
公开(公告)号：JP2003300156A
公开(公告)日：2003-10-21
申请号：JP2002106670
申请日：2002-04-09
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： KANO TAKASHI , KUREBAYASHI YUTAKA
IPC分类号： B24B49/16 , B24B49/18 , B24B53/00
摘要： PROBLEM TO BE SOLVED: To provide a grinding performance evaluating method capable of exactly and simply evaluating the grinding performance of a workpiece having a curved surface-shaped ground surface.
SOLUTION: After forming a cylindrical surface 4b having the same curvature as a grinding wheel on a tip end surface of a test piece 4 by a cylindrical grinding wheel 2 equipped to a main shaft of a general-purpose lathe, the cylindrical grinding wheel is subjected to dressing. Then, while grinding of the test piece cylindrical surface by the cylindrical grinding wheel is repeated, grinding resistance added on the cylindrical grinding wheel is measured by a dynamometer. On the basis of the total number of grinding execution until the grinding resistance exceeds a predetermined value, the grinding performance of the test piece is evaluated. On the basis of the evaluated result about a plurality of test pieces structured from different materials, a structuring material of the workpiece having the grinding performance can be selected.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种能够准确且简单地评价具有曲面状地面的工件的研磨性能的磨削性能评价方法。解决方案：通过装配到通用车床主轴的圆柱形砂轮2，在试件4的前端面上形成具有与砂轮相同曲率的圆柱形表面4b，圆柱形磨削轮子进行敷料。然后，通过圆柱形砂轮重复对试件圆柱形表面的磨削，通过测力计测量加在圆柱形砂轮上的耐磨性。基于研磨执行的总数，直到研磨阻力超过预定值，评估试验片的研磨性能。基于关于由不同材料构成的多个测试件的评估结果，可以选择具有研磨性能的工件的结构材料。版权所有（C）2004，JPO

10. 发明专利

JP2008088473A Method for manufacturing crankshaft 有权
标题翻译：制造起重机的方法
公开(公告)号：JP2008088473A
公开(公告)日：2008-04-17
申请号：JP2006268327
申请日：2006-09-29
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： HOBO MAKOTO , KUREBAYASHI YUTAKA
IPC分类号： C21D9/30 , B21J5/00 , B21K1/08 , C21D1/06 , C22C38/00 , C22C38/60 , F16C3/08
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a crankshaft having excellent bending straightening property and strength characteristic as compared with the conventional crankshaft.
SOLUTION: The method for manufacturing the crankshaft includes: a process in which a steel is hot-forged into a crankshaft shape at ≥1,100°C; a process in which the corner round part in this pin part and/or a journal par of the obtained forged product are worked at 5-50% working ratio within the temperature range of 800-1,000°C; and a process in which the obtained worked product is subjected to a soft-nitriding treatment or a nitriding treatment.
COPYRIGHT: (C)2008,JPO&INPIT

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