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    HIGH-STRENGTH STEEL, AND CRANKSHAFT MANUFACTURED USING SAID HIGH-STRENGTH STEEL
    4.
    发明公开
    HIGH-STRENGTH STEEL, AND CRANKSHAFT MANUFACTURED USING SAID HIGH-STRENGTH STEEL 审中-公开
    HITCHESTER STAHL MIT DIESEM HOCHFESTER STAHL HERGESTELLTE KURBELWELLE

    公开(公告)号：EP3040438A1

    公开(公告)日：2016-07-06

    申请号：EP14841312.3

    申请日：2014-08-26

    申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

    发明人： TAKAOKA, Hiroyuki ,  SHINOZAKI, Tomoya ,  IBANO, Akira

    IPC分类号： C22C38/00 ,  C22C38/46 ,  F16C3/06

    CPC分类号： C22C38/00 ,  C22C38/46 ,  F16C3/08 ,  F16C2204/62 ,  F16C2204/72

    摘要： An object of this invention is to provide a high-strength steel endowed with high fatigue strength while also having increased strength and toughness, and a crankshaft manufactured using this high-strength steel. The high-strength steel according to the invention contains 0.30 mass % or more and 0.50 mass % or less of C, more than 0 mass % and 0.15 mass % or less of Si, 0.80 mass % or more and 1.5 mass % or less of Mn, 0.8 mass % or more and 2.4 mass % or less of Ni, 1.0 mass % or more and 3.0 mass % or less of Cr, 0.35 mass % or more and 0.70 mass % or less of Mo, 0.10 mass % or more and 0.25 mass % or less of V and 0.001 mass % or more and 0.040 mass % or less of Al, with the balance being iron and inevitable impurities. The high-strength steel is mainly composed of martensit, wherein a Mn concentration in cementite is 0.90 mass % or more and 1.80 mass % or less, and a ratio of Mn content to Si content is 5.50 or more.

    摘要翻译： 本发明的目的是提供具有高疲劳强度并且还具有增强的强度和韧性的高强度钢和使用该高强度钢制造的曲轴。 本发明的高强度钢含有0.30质量％以上且0.50质量％以下的C，超过0质量％，0.15质量％以下的Si，0.80质量％以上且1.5质量％以下 Mn，0.8质量％以上且2.4质量％以下的Ni，1.0质量％以上且3.0质量％以下的Cr，0.35质量％以上且0.70质量％以下的Mo，0.10质量％以上，以及 0.25质量％以下的V和0.001质量％以上且0.040质量％以下的Al，余量为铁和不可避免的杂质。 高强度钢主要由马氏体组成，其中渗碳体中的Mn浓度为0.90质量％以上且1.80质量％以下，Mn含量与Si含量的比例为5.50以上。

    CASE HARDENING METHOD FOR HIGH PERFORMANCE LONG LIFE MARTENSITIC STAINLESS STEEL BEARINGS
    8.
    发明公开
    CASE HARDENING METHOD FOR HIGH PERFORMANCE LONG LIFE MARTENSITIC STAINLESS STEEL BEARINGS 审中-公开
    EINSATZHÄRTUNGSVERFAHRENFÜRLEISTUNGSSTARKE LANGLEBIGE LAGER AUS MARTENSITISCHEM EDELSTAHL

    公开(公告)号：EP3074542A1

    公开(公告)日：2016-10-05

    申请号：EP14863663.2

    申请日：2014-11-24

    申请人： United Technologies Corporation

    发明人： CHIN, Herbert A. ,  HALUCK, David A. ,  OGDEN, William P. ,  MOULIN, Michael A.

    IPC分类号： C21D1/06

    CPC分类号： C21D9/38 ,  C21D1/06 ,  C21D6/002 ,  C21D7/13 ,  C21D2211/008 ,  C23C8/02 ,  C23C8/22 ,  C23C8/32 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16C2204/72 ,  F16C2223/12 ,  F16C2223/16

    摘要： A method for cost effectively case hardening a component formed from a martensitic stainless steel material with a desired metallurgical condition for high temperature, high rolling contact fatigue, corrosion and spall initiation and propagation resistance bearing performance. The method describes a method to significantly reduce the carburization or carbo-nitriding process times for appreciable reduction in manufacturing cost. The Method includes the steps of: forming the component from a martensitic stainless steel material having an ASTM grain size of 9 or finer; and subjecting the component to one of a carburization and a carbo-nitriding treatment with significantly lower case hardening times for manufacturing cost-effectiveness.

    摘要翻译： 一种用于具有期望的冶金条件的马氏体不锈钢材料形成的用于高温，高滚动接触疲劳，腐蚀和剥离起始和传播阻力承载性能的成分的方法。 该方法描述了显着减少渗碳或碳氮化处理时间的方法，以明显降低制造成本。 该方法包括以下步骤：从ASTM晶粒尺寸为9或更细的马氏体不锈钢材料形成组分; 并以显着低的硬化时间对组分进行渗碳和碳氮化处理之一，从而制造成本效益。

    ROLLING BEARING AND METHOD FOR PRODUCING SAME
    10.
    发明公开
    ROLLING BEARING AND METHOD FOR PRODUCING SAME 审中-公开
    WÄLZLAGERUND VERFAHREN ZU SEINER HERSTELLUNG

    公开(公告)号：EP2789709A1

    公开(公告)日：2014-10-15

    申请号：EP12854746.0

    申请日：2012-11-29

    申请人： NSK Ltd.

    发明人： YAMADA , Hiroki ,  UYAMA , Hideyuki ,  TSUTSUMI , Masako ,  MORITO,Yusuke

    IPC分类号： C22C38/00 ,  C21D1/06 ,  C21D9/40 ,  C22C38/44 ,  F16C19/04 ,  F16C33/62 ,  F16C33/64

    CPC分类号： C22C38/00 ,  C21D9/40 ,  C21D2211/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C23C8/22 ,  C23C8/32 ,  C23C8/80 ,  F16C33/32 ,  F16C33/62 ,  F16C33/64 ,  F16C2204/72

    摘要： After carburizing or carbonitriding and before quenching and tempering, there is provided a step of furnace cooling and retaining a rolling bearing part at a temperature of 620 to 700°C for a predetermined time, whereby, on the contact surface of the rolling bearing part made of alloy steel containing appropriate amounts of Cr and Mo, the C+N content is 0.9 to 1.4 mass % and the area ratio of carbide is 10% or less, and at the depth of 1% of the diameter of the rolling element from the contact surface, the hardness is 720 to 832 in Hv, the amount of retained austenite is 20 to 45 volume %, and the compressive residual stress is 50 to 300 Mpa, and at the depth of 1 to 3% of the diameter of the rolling element from the contact surface, the average value of the prior austenite grain size is 20 µm or less and the maximum value of the prior austenite grain size is 3 times or less the average value, and the hardness of the core portion is 400 to 550 in Hv.

    摘要翻译： 在渗碳或碳氮共渗之后，在淬火回火之前，提供炉温冷却并在620-700℃的温度下将滚动轴承部件保持预定时间的步骤，由此在滚动轴承部件的接触表面 的含有适量Cr和Mo的合金钢，C + N含量为0.9〜1.4质量％，碳化物的面积率为10％以下，在滚动体的直径的1％ 接触面，Hv的硬度为720〜832，残留奥氏体的量为20〜45体积％，压缩残余应力为50〜300MPa，在轧制直径的1〜3％的深度 元素从原来的奥氏体晶粒尺寸的平均值为20μm以下，原奥氏体晶粒的最大值为平均值的3倍以下，芯部的硬度为400〜550 在Hv。