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    CASE-HARDENED STEEL AND CARBURIZED MATERIAL
    3.
    发明公开
    CASE-HARDENED STEEL AND CARBURIZED MATERIAL 审中-公开
    EINSATZGEHÄRTETERSTAHL UND AUFGEKOHLTES材料

    公开(公告)号：EP2530178A1

    公开(公告)日：2012-12-05

    申请号：EP11736785.4

    申请日：2011-01-26

    申请人： JFE Steel Corporation

    发明人： ICHIMIYA, Katsuyuki ,  HASE, Kazukuni ,  KIMURA, Hideto

    IPC分类号： C22C38/00 ,  C21D1/06 ,  C21D6/00 ,  C22C38/32 ,  C22C38/54

    CPC分类号： C22C38/02 ,  C21D1/06 ,  C21D1/25 ,  C21D6/002 ,  C21D2211/004 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/04 ,  C22C38/26 ,  C22C38/28 ,  C23C8/22 ,  C23C8/80

    摘要： The present invention provides a case hardening steel, comprising a component composition including C: 0.10 mass % to 0.35 mass %; Si: 0.01 mass % to 0.50 mass %; Mn: 0.40 mass % to 1.50 mass %; P: 0.02 mass % or less; S: 0.03 mass % or less; Al: 0.04 mass % to 0.10 mass %; Cr: 0.5 mass % to 2.5 mass %; B: 0.0005 mass % to 0.0050 mass %; Nb: 0.003 mass % to 0.080 mass %; Ti: 0.003 mass % or less; N: less than 0.0080 mass %; and balance as Fe and incidental impurities.

    摘要翻译： 本发明提供一种表面硬化钢，其包含C：0.10质量％〜0.35质量％的组成成分， Si：0.01质量％〜0.50质量％ Mn：0.40质量％〜1.50质量％ P：0.02质量％以下 S：0.03质量％以下; Al：0.04质量％〜0.10质量％ Cr：0.5质量％〜2.5质量％ B：0.0005质量％〜0.0050质量％ Nb：0.003质量％〜0.080质量％ Ti：0.003质量％以下; N：小于0.0080质量％ 并作为Fe和杂质杂质平衡。

    INGOT FOR BEARING, AND PROCESS FOR PRODUCING BEARING STEEL
    4.
    发明公开
    INGOT FOR BEARING, AND PROCESS FOR PRODUCING BEARING STEEL 有权
    GESCHMIEDETER STABSTAHLFÜRAUFLAGER UND VERFAHREN ZUR HERSTELLUNG DIESES GESCHMIEDETEN STABSTAHLS

    公开(公告)号：EP2508638A1

    公开(公告)日：2012-10-10

    申请号：EP10833434.3

    申请日：2010-11-30

    申请人： JFE Steel Corporation

    发明人： HONJO, Minoru ,  HASE, Kazukuni ,  KIMURA, Hideto

    IPC分类号： C22C38/00 ,  C22C38/18 ,  C22C38/54 ,  C21D8/06 ,  F16C33/62 ,  F16C33/64

    CPC分类号： C21D9/40 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/40 ,  F16C2204/64

    摘要： An ingot steel for bearings has a composition containing C: 0.56% by mass or more and 0.70% by mass or less, Si: 0.15% by mass or more and less than 0.50% by mass, Mn: 0.60% by mass or more and 1.50% by mass or less, Cr: 0.50% by mass or more and 1.10% by mass or less, P: 0.025% by mass or less, S: 0.025% by mass or less, Al: 0.005% by mass or more and 0.500% by mass or less, O: 0.0015% by mass or less, N: 0.0030% by mass or more and 0.015% by mass or less, and a remainder of Fe and incidental impurities, wherein eutectic carbide formation index Ec satisfies 0

    摘要翻译： 用于轴承的锭钢具有C：0.56质量％以上且0.70质量％以下的组成，Si：0.15质量％以上且小于0.50质量％，Mn：0.60质量％以上，以及 1.50质量％以下，Cr：0.50质量％以上且1.10质量％以下，P：0.025质量％以下，S：0.025质量％以下，Al：0.005质量％以上，以及 0.500质量％以下，O：0.0015质量％以下，N：0.0030质量％以上且0.015质量％以下，剩余的Fe和附带杂质，其中共晶碳化物形成指数Ec满足0 < Ec‰¤0.25。 这可以减少偏析区中共晶碳化物的形成。

    METHOD OF COOLING HOT FORGED PART, APPARATUS THEREFOR, AND PROCESS FOR PRODUCING HOT FORGED PART
    5.
    发明公开
    METHOD OF COOLING HOT FORGED PART, APPARATUS THEREFOR, AND PROCESS FOR PRODUCING HOT FORGED PART 审中-公开
    方法用于其和冷却热锻构件，设备的方法的用于生产热锻件

    公开(公告)号：EP2103696A1

    公开(公告)日：2009-09-23

    申请号：EP07860537.5

    申请日：2007-12-21

    申请人： JFE Steel Corporation

    发明人： HASE, Kazukuni ,  KIMURA, Hideto ,  TOYOOKA, Takaaki

    IPC分类号： C21D9/00 ,  B21K1/12 ,  B21K29/00 ,  C21D1/00

    CPC分类号： B21K29/00 ,  B21K1/12 ,  B21K1/40 ,  C21D1/667 ,  C21D9/30 ,  F16C3/08 ,  F16C2220/46

    摘要： A hot forged part is provided, wherein in production of a axial part with a flange portion by using a steel material through hot forging, good cold workability is provided to the flange portion and, in addition, high fatigue strength is provided to the boundary portion between the flange portion and the axial portion. In cooling of the hot forged part having the flange portion and the axial portion, the hot forged part is supported in such a way that the axial direction of the above-described axial portion agrees with a vertical direction during hot forging of the hot forged part or after the hot forging, and a coolant is blown locally on the boundary portion between the flange portion and the axial portion from below the above-described flange portion.

    摘要翻译： 的热锻构件被提供，在生产具有凸缘部分的轴向部分的worin通过使用经过热锻造钢材料，良好的冷加工性被提供给凸缘部，另外，高疲劳强度被提供给边界部分 凸缘部和轴部之间。 在具有凸缘部和轴部的热锻构件的冷却，所述热锻构件被支撑在寻求一种方式做了上述轴向部分的轴向方向上的热锻构件的热锻过程中与垂直方向一致 或热锻造后，和冷却剂被局部在凸缘部分和从上述凸缘部下方的轴部之间的边界部分熔断。

    SPRING STEEL AND METHOD OF MANUFACTURE FOR SAME
    6.
    发明公开
    SPRING STEEL AND METHOD OF MANUFACTURE FOR SAME 有权
    弹簧钢及其制造方法

    公开(公告)号：EP2557195A1

    公开(公告)日：2013-02-13

    申请号：EP11762141.7

    申请日：2011-02-28

    申请人： JFE Steel Corporation

    发明人： HONJO, Minoru ,  HASE, Kazukuni ,  KIMURA, Hideto

    IPC分类号： C22C38/34 ,  C22C38/54 ,  C21D8/06

    CPC分类号： F16F1/021 ,  C21D1/25 ,  C21D8/06 ,  C21D9/02 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/22 ,  C22C38/34

    摘要： Disclosed is high strength spring steel that can limit the depth of pitting occurring when corroded and therefore possesses high strength as well as excellent pitting corrosion resistance and corrosion fatigue property, with a composition containing: C: greater than 0.35 mass % and less than 0.50 mass %; Si: greater than 1.75 mass % and less than or equal to 3.00 mass %; Mn: 0.2 mass % to 1.0 mass %; Cr: 0.01 mass % to 0.04 mass %; P: 0.025 mass % or less; S: 0.025 mass % or less; Mo: 0.1 mass % to 1.0 mass %; and O: 0.0015 mass % or less, under a condition that a PC value calculated by PC = 4.2×([C]+[Mn])+0.1×(1/[Si]+1/[Mo])+20.3×[Cr]+0.001×(1/[N]) is greater than 3,3 and equal to or less than 8.0. Also disclosed is a preferred method for manufacturing the same.

    DEVICE ARRAY FOR MANUFACTURING SEAMLESS STEEL PIPES, AND METHOD FOR MANUFACTURING HIGH-STRENGTH STAINLESS SEAMLESS STEEL PIPE FOR OIL WELLS USING SAME
    9.
    发明公开
    DEVICE ARRAY FOR MANUFACTURING SEAMLESS STEEL PIPES, AND METHOD FOR MANUFACTURING HIGH-STRENGTH STAINLESS SEAMLESS STEEL PIPE FOR OIL WELLS USING SAME 审中-公开
    无缝钢管用和方法的生产装置用于生产高强度钢无缝钢管石油钻探，以便安排

    公开(公告)号：EP3023507A1

    公开(公告)日：2016-05-25

    申请号：EP14857371.0

    申请日：2014-09-25

    申请人： JFE Steel Corporation

    发明人： SASAKI, Shunsuke ,  KATSUMURA, Tatsuro ,  KIMURA, Hideto

    IPC分类号： C21D9/00 ,  B21B1/38 ,  B21B45/00 ,  B21B45/02 ,  C21D8/10 ,  C22C38/00 ,  C22C38/58

    CPC分类号： C21D9/085 ,  B21B17/08 ,  B21B19/04 ,  B21B23/00 ,  B21B45/0203 ,  C21D6/004 ,  C21D6/005 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

    摘要： Provided is an equipment line for manufacturing a seamless steel tube and a method of manufacturing a heavy-walled high-strength stainless seamless steel tube for oil wells having excellent low-temperature toughness using the equipment line. In the equipment line where a heating device, a piercing device and a rolling mill are arranged, a cooling system is further arranged between the heating device and the piercing device or between the piercing device and the rolling mill. A thermostat may be arranged on an exit side of the rolling mill. Using the equipment line, a heated steel having a stainless steel chemical composition or a hollow steel tube formed by piercing the heated steel is cooled by accelerated cooling to a cooling stop temperature of 600°C or above at an average cooling rate of 1.0°C/s or more thus allowing the hollow steel tube to have a phase distribution in a non-equilibrium state and, immediately thereafter, the hollow steel tube is formed into a seamless tube having a predetermined size. Accordingly, the microstructure can become extremely fine even when a hot working amount is small so that the heavy-walled steel tube can ensure excellent low-temperature toughness even at the wall thickness center portion whereby a heavy-walled high-strength stainless seamless steel tube having excellent low-temperature toughness can be manufactured easily at a low cost.

    摘要翻译： 本发明提供一种设备线用于制造无缝钢管及其制造厚壁高强度不锈钢无缝钢管用于使用所述设备线具有优良的低温韧性的油井管的方法。 在装备线，其中的加热装置，穿孔装置和轧机布置中，冷却系统被进一步加热装置和所述穿刺装置之间或在装置和穿孔轧机之间设置。 恒温器可在所述辊轧机的出口侧被布置在。 使用设备线，具有不锈钢的化学成分或空心钢管通过刺穿加热的钢形成的被加热钢通过加速冷却或以上以速率的平均冷却冷却至600℃的冷却停止温度1.0℃ / s以上从而使空心钢管具有在非平衡状态下的相位分布，其后立即将中空钢管形成为具有预定尺寸的无缝管。 因此，微结构可以变得极细即使当热加工量小，所以做了厚壁钢管即使在壁厚中央部确保优异的低温韧性，由此厚壁高强度不锈钢无缝钢管 具有优异的低温韧性可以以低成本容易地制造。