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    AGE-HARDENABLE STEEL, AND METHOD FOR MANUFACTURING COMPONENTS USING AGE-HARDENABLE STEEL
    1.
    发明公开
    AGE-HARDENABLE STEEL, AND METHOD FOR MANUFACTURING COMPONENTS USING AGE-HARDENABLE STEEL 审中-公开
    时效硬化钢及使用时效硬化钢制造元件的方法

    公开(公告)号：EP3272896A1

    公开(公告)日：2018-01-24

    申请号：EP16765035.7

    申请日：2016-03-16

    申请人： Nippon Steel & Sumitomo Metal Corporation ,  DENSO CORPORATION

    发明人： YUYA, Masato ,  TAKASUGA, Motoki ,  MAKINO, Taizo ,  HIGASHIDA, Masashi ,  HASEGAWA, Tatsuya ,  NISHIWAKI, Tadashi ,  MORITA, Kouji ,  ITO, Toshimasa ,  TANIMURA, Yoshiro ,  FUKUOKA, Tomomitsu

    IPC分类号： C22C38/00 ,  C22C38/60 ,  C21D8/00 ,  C21D9/00

    摘要： Age hardenable steel is low in hardness after hot forging, providing a machine part with the desired fatigue strength and yield strength by aging treatment, and high in toughness after aging treatment, comprising C: 0.09 to 0.20%, Si: 0.01 to 0.40%, Mn: 1.5 to 2.5%, S: 0.001 to 0.045%, Cr: over 1.00% to 2.00%, Al: 0.001 to 0.060%, V: 0.22 to 0.55%, N: over 0.0080 to 0.0170%, and a balance of Fe and impurities, where an area rate of bainite structures is 80% or more, an effective V ratio (amount of dissolved V/total amount of V) is 0.9 or more, a P and Ti in the impurities is P: 0.03% or less and Ti: less than 0.005%, and the chemical composition is one where the following F1 is 1.00 or less and the F2 is 0.30 or more: F 1 = C + 0.1 × Si + 0.2 × Mn + 0.15 × Cr + 0.35 × V F 2 = − 4.5 × C + Mn + Cr − 3.5 × V

    摘要翻译： 时效硬化钢在热锻后硬度低，通过时效处理可以提供具有所需疲劳强度和屈服强度的机械部件，并且时效处理后的韧性高，包括C：0.09至0.20％，Si：0.01至0.40％ ，Mn：1.5〜2.5％，S：0.001〜0.045％，Cr：超过1.00％〜2.00％，Al：0.001〜0.060％，V：0.22〜0.55％，N：超过0.0080〜0.0170％ 贝氏体组织的面积率为80％以上，有效V比率（溶解V量/ V总量）为0.9以上的杂质，杂质中的P和Ti为0.03％以下 和Ti：小于0.005％，并且化学组成为以下F1为1.00以下且F2为0.30以上的化学组成：F1 = C + 0.1×Si + 0.2×Mn + 0.15×Cr + 0.35×V F2 = -4.5×C +的Mn + Cr系3.5×V

    ROLLED ROD STEEL FOR HOT FORGING, HOT-FORGED ROUGHLY SHAPED MATERIAL, AND COMMON RAIL AND PROCESS FOR PRODUCING SAME
    2.
    发明公开
    ROLLED ROD STEEL FOR HOT FORGING, HOT-FORGED ROUGHLY SHAPED MATERIAL, AND COMMON RAIL AND PROCESS FOR PRODUCING SAME 审中-公开
    WÄLZDRAHTSTAHL温锻BY温锻GROB成形的材料和普通铁路和方法及其生产

    公开(公告)号：EP2816131A1

    公开(公告)日：2014-12-24

    申请号：EP13749063.7

    申请日：2013-02-05

    申请人： Nippon Steel & Sumitomo Metal Corporation ,  Denso Corporation

    发明人： MATSUI, Naoki ,  HIGASHIDA, Masashi ,  MATSUMOTO, Hitoshi ,  NEISHI, Yutaka ,  MAKINO, Taizo ,  MORITA, Kouji ,  TANIMURA, Yoshihiro ,  SASHIMA, Naoyuki ,  ITOU, Toshimasa

    IPC分类号： C22C38/00 ,  C22C38/12 ,  C22C38/58 ,  C21D8/06

    摘要： A rolled steel bar for hot forging consisting, by mass percent, of C: 0.25-0.50%, Si: 0.40-1.0%, Mn: 1.0-1.6%, S: 0.005-0.035%, Al: 0.005-0.050%, V: 0.10-0.30%, and N: 0.005-0.030%, and the balance of Fe and impurities, the contents of P and O in the impurities being P: 0.035% or less and O: 0.0030% or less, and value represented by Fn1 = C + Si/10 + Mn/5 + 5Cr/22 + 1.65V - 5S/7 being 0.90 to 1.20, wherein the predicted maximum width of nonmetallic inclusions at the time when a cumulative distribution function obtained by extreme value statistical processing by taking the width of nonmetallic inclusion in an R 1 /2 part of a longitudinal cross section of the rolled steel bar as W (µm) is 99.99% is 100 µm or narrower; and the number density of sulfides each having a circle-equivalent diameter of 0.3 to 1.0 µm observed per unit area of the R 1 /2 part of a transverse cross section of the rolled steel bar is 500 pieces/mm 2 or higher;
    where, the symbol of an element in Formula (i) represents the content (mass%) of the element.

    摘要翻译： 甲轧制棒钢热锻由......组成，以质量％计，C的：0:25至12：50％以下，Si：0.40-1.0％以下，Mn：1.0-1.6％，S：0005-0035％以下，Al：0005-0050％，V ：0:10至12：30％，N：从0005至0030％，和Fe和杂质的平衡，P和O中的杂质的含量为P：0.035％以下和O：0.0030％以下，和值由代表 FN1 = C +的Si / 10 +的Mn / 5 + 5CR / 22 + 1.65V - 5S / 7为0.90〜1.20，worin非金属夹杂物的预测最大宽度在时间当累积分布函数所获得由极值统计处理 以非金属夹杂物的宽度在轧制棒钢作为W（微米）的纵向横截面的A R 1/2的部分是99.99％为100微米或更窄; 和具有每轧制棒钢的一个横截面中的R 1/2部分的单位面积的观察0.3〜1.0微米的当量圆直径的每个硫化物的数密度为500个/ mm 2或更高; 其中，元件的在通式（i）的符号darstellt的元素的含量（质量％）。

    ROLLED ROUND STEEL MATERIAL FOR STEERING RACK BAR, AND STEERING RACK BAR
    3.
    发明公开
    ROLLED ROUND STEEL MATERIAL FOR STEERING RACK BAR, AND STEERING RACK BAR 有权
    用于转向架杆的滚动圆钢材料和转向架杆

    公开(公告)号：EP3040435A1

    公开(公告)日：2016-07-06

    申请号：EP14839024.8

    申请日：2014-06-18

    申请人： Nippon Steel & Sumitomo Metal Corporation

    发明人： EGASHIRA, Makoto ,  HORIKAMI, Sadanori ,  HIGASHIDA, Masashi ,  OKADA, Takahiro ,  NEISHI, Yutaka ,  HASEGAWA, Tatsuya ,  MATSUMOTO, Hitoshi

    IPC分类号： C22C38/00 ,  C22C38/38 ,  C22C38/58 ,  C21D8/06

    CPC分类号： C22C38/60 ,  B21B1/16 ,  B21B3/02 ,  B62D3/12 ,  C21D1/10 ,  C21D1/18 ,  C21D7/06 ,  C21D8/06 ,  C21D9/0075 ,  C21D9/28 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

    摘要： A rolled round steel material for a steering rack bar contains C in an amount of 0.38 to 0.55%, Si in an amount of 1.0% or less, Mn in an amount of 0.20 to 2.0%, S in an amount of 0.005 to 0.10%, Cr in an amount of 0.01 to 2.0%, Al in an amount of 0.003 to 0.10%, B in an amount of 0.0005 to 0.0030%, Ti in an amount of 0.047% or less, Cu in an amount of 0 to 1.0%, Ni in an amount of 0 to 3.0%, Mo in an amount of 0 to 0.50%, Nb in an amount of 0 to 0.10%, V in an amount of 0 to 0.30%, Ca in an amount of 0 to 0.005%, and Pb in an amount of 0 to 0.30%, a remaining portion being constituted by Fe and an impurities, the impurities containing P in an amount of 0.030% or less and N in an amount of 0.008% or less, and has a chemical composition satisfying [3.4N≤Ti≤3.4N+0.02]. The microstructure is constituted by ferrite (F), lamellar pearlite (LP), and cementite (C), and in the latitudinal cross-section, in a region extending from a surface to a position located a distance of 1/2 the radius therefrom, the average particle diameter of F is 10 µm or less, the area percentage of LP is less than 20%, and the number of pieces of spheroidal cementite (SC) in C is 4×10 5 pieces/mm 2 or more, and, in a central portion, the area percentage of LP is 20% or more and the number of pieces of SC is less than 4×10 5 pieces/mm 2 , and in the longitudinal cross-section, the average aspect ratio of F in a region extending from a surface to a position located a distance of 1/2 the radius therefrom is 3 or more. This steel material has a high base material toughness and good machinability without performing thermal refining.

    摘要翻译： 用于转向齿条的轧制圆钢材含有0.38〜0.55％的C，1.0％以下的Si，0.20〜2.0％的Mn，0.005〜0.10％的S， ，Cr：0.01〜2.0％，Al：0.003〜0.10％，B：0.0005〜0.0030％，Ti：0.047％以下，Cu：0〜1.0％ ，Ni 0〜3.0％，Mo 0〜0.50％，Nb 0〜0.10％，V 0〜0.30％，Ca 0〜0.005％ ，Pb：0〜0.30％，剩余部分由Fe和杂质构成，含有P：0.030％以下，N：0.008％以下的杂质，具有化学式 组成满足[3.4N≤Ti≤3.4N+ 0.02]。 微观组织由铁素体（F），层状珠光体（LP）和渗碳体（C）构成，并且在横向截面中​​，在从表面延伸到距半径距离为1/2的位置的区域 ，F的平均粒径为10μm以下，LP的面积率小于20％，C中的球状渗碳体（SC）的个数为4×10 5个/ mm 2以上， 中心部分，LP的面积百分比为20％以上，SC的数量小于4×105个/ mm2，纵向截面中的F的平均纵横比从 位于与其半径的1/2的距离的位置的表面为3或更大。 这种钢材不需要进行热精炼就具有高基材韧性和良好的机械加工性。

    AGE HARDENING STEEL
    4.
    发明公开
    AGE HARDENING STEEL 有权
    时代硬化钢

    公开(公告)号：EP2985362A1

    公开(公告)日：2016-02-17

    申请号：EP14850839.3

    申请日：2014-10-01

    申请人： Nippon Steel & Sumitomo Metal Corporation

    发明人： HIGASHIDA, Masashi ,  YUYA, Masato ,  MATSUMOTO, Hitoshi ,  HASEGAWA, Tatsuya ,  NEISHI, Yutaka ,  MAKINO, Taizo

    IPC分类号： C22C38/00 ,  C22C38/60 ,  C21D8/00

    摘要： An age-hardenable steel having a chemical composition consisting of: C: 0.05 to 0.20%, Si: 0.01 to 0.50%, Mn: 1.5 to 2.5%, S: 0.005 to 0.08%, Cr: more than 0.50% and not more than 1.6%, Al: 0.005 to 0.05%, V: 0.25 to 0.50%, Mo: 0 to 1.0%, Cu: 0 to 0.3%, Ni: 0 to 0.3%, Ca: 0 to 0.005%, and Bi: 0 to 0.4%, with the balance being Fe and impurities, wherein within the impurities, P ≤ 0.03%, Ti

    摘要翻译： 一种时效硬化型钢，具有由C：0.05〜0.20％，Si：0.01〜0.50％，Mn：1.5〜2.5％，S：0.005〜0.08％，Cr：超过0.50％且不超过 Al：0.005〜0.05％，V：0.25〜0.50％，Mo：0〜1.0％，Cu：0〜0.3％，Ni：0〜0.3％，Ca：0〜0.005％，Bi：0〜 0.4％，余量为Fe和杂质，其中杂质中P≤0.03％，Ti <0.005％，N <0.0080％，进一步为[C + 0.3Mn + 0.25Cr +0.6Mo≥0.68]，[ C + 0.1Si + 0.2Mn + 0.15Cr + 0.35V +0.2Mo≤1.05]和[-4.5C + Mn + Cr-3.5V-0.8Mo≥0.12]。 该时效硬化性钢的时效处理前的硬度为310HV以下，时效处理后的时效处理后的疲劳强度为480MPa以上，在时效处理后的20℃下的吸收能量为12J以上 通过使用缺口深度为2mm且缺口底部半径为1mm的U形缺口的标准样品进行夏比冲击试验，因此非常适合用于机械部件的原材料。

    ROLLED STEEL BAR FOR HOT FORGING
    6.
    发明公开
    ROLLED STEEL BAR FOR HOT FORGING 审中-公开
    GEWALZTER STAHLSTAB ZUM WARMSCHMIEDEN

    公开(公告)号：EP2784169A1

    公开(公告)日：2014-10-01

    申请号：EP12852067.3

    申请日：2012-11-07

    申请人： Nippon Steel & Sumitomo Metal Corporation

    发明人： HIGASHIDA, Masashi ,  MATSUMOTO, Hitoshi ,  MATSUI, Naoki ,  NEISHI, Yutaka ,  MAKINO, Taizo

    IPC分类号： C22C38/00 ,  C22C38/24 ,  C22C38/46 ,  C21D8/06

    CPC分类号： C22C38/50 ,  B21J1/003 ,  B21J1/06 ,  B21J5/002 ,  C21D7/13 ,  C21D8/06 ,  C21D9/0075 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46

    摘要： A rolled steel bar for hot forging having a chemical composition consisting, by mass percent, of C: 0.27 to 0.37%, Si: 0.30 to 0.75%, Mn: 1.00 to 1.45%, S: 0.008% or more and less than 0.030%, Cr: 0.05 to 0.30%, Al: 0.005 to 0.050%, V: 0.200 to 0.320%, and N: 0.0080 to 0.0200%, the balance being Fe and impurities, wherein the contents of P, Ti and O in the impurities are, by mass percent, P: 0.030% or less, Ti: 0.0040% or less, and O: 0.0020% or less; and Y1 expressed by the following formula is 1.05 to 1.18.

    where, C, Si, Mn, Cr, V, and S in the above formula represent, respectively, the content by mass percent of each of the elements.
    A hot-forged part having a tensile strength of 900 MPa or higher and a transverse endurance ratio of 0.47 or higher after hot forging can be obtained by the rolled steel bar.

    摘要翻译： 一种热锻用轧制钢棒，其化学成分以质量％计含有C：0.27〜0.37％，Si：0.30〜0.75％，Mn：1.00〜1.45％，S：0.008％以上且小于0.030％ ，Cr：0.05〜0.30％，Al：0.005〜0.050％，V：0.200〜0.320％，N：0.0080〜0.0200％，余量为Fe和杂质，杂质中的P，Ti，O含量为 以质量％计，P：0.030％以下，Ti：0.0040％以下，O：0.0020％以下。 由下式1表示的Y1为1.05〜1.18。 其中，上述式1中的C，Si，Mn，Cr，V和S分别表示各元素的质量％。 可以通过轧制钢筋获得热锻后的拉伸强度为900MPa以上，横向耐久性比为0.47以上的热锻部。