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    METHOD FOR PRODUCING A HIGH-STRENGTH TRACK ELEMENT AND TRACK ELEMENT THUS OBTAINED
    31.
    发明申请
    METHOD FOR PRODUCING A HIGH-STRENGTH TRACK ELEMENT AND TRACK ELEMENT THUS OBTAINED 审中-公开
    用于生产高固铁路轨道及部分零件

    公开(公告)号：WO99009222A1

    公开(公告)日：1999-02-25

    申请号：PCT/EP1998/004894

    申请日：1998-08-06

    IPC分类号： C21D1/20 ,  C21D9/04 ,  C22C38/22 ,  E01B7/00

    CPC分类号： E01B7/00 ,  C21D1/20 ,  C21D9/04 ,  C21D2211/002 ,  C22C38/22

    摘要： The invention relates to a high-strength track element, in particular a point element, such as a cross frog, tongue blade or wing rail, which is made of steel and formed by rolling. The track element is characterized by high strength, a high yield point and increased service life. To this end, the track element consists of steel having the following recommended chemical analysis: 0.3-0.6 % C, 0.8-1.5 % Si, 0.7-1.0 % Mn, 0.9-1.4 % Cr, 0.6-1.0 % Mo, as well as of iron and the usual impurities caused by fusion. It has a fine needle bainitic basic structure, a tensile strength of at least 1600 N/mm and a technical yield point of at least 1250 N/mm .

    摘要翻译： 本发明涉及一种高强度轨道元件，特别是开关元件如心脏，舌或翼轨，由钢制成的，它是通过轧制而形成。 因此，该磁迹部分经受高强度，并在寿命屈服强度增加，所以建议的磁迹部分是0.3的钢的化学分析取向至0.6％C，0.8〜1.5％的Si，0.7至1 0％的Mn，0.9〜1.4％的Cr，0.6至1.0％的Mo，余量为铁和所得融合的微细针贝氏体结构，至少1600牛顿/毫米的拉伸强度<2>和通常的杂质 产生至少1250牛顿/平方毫米强度<2>。

    HEAT TREATED COLD ROLLED STEEL SHEET AND A METHOD OF MANUFACTURING THEREOF
    33.
    发明申请
    HEAT TREATED COLD ROLLED STEEL SHEET AND A METHOD OF MANUFACTURING THEREOF 审中-公开

    公开(公告)号：WO2022008949A1

    公开(公告)日：2022-01-13

    申请号：PCT/IB2020/056330

    申请日：2020-07-06

    申请人： ARCELORMITTAL

    发明人： FAN, Dongwei ,  GIRINA, Olga

    IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D6/02 ,  C21D1/20 ,  C23C2/06

    摘要： A cold rolled steel sheet having a composition comprising of 0.05 % ≤ Carbon ≤ 0.15 %, 1.8% ≤ Manganese ≤ 2.7%, 0.1% ≤ Silicon ≤ 1%,0.01% ≤ Aluminum ≤ 0.8%,0.1% ≤ Chromium ≤ 0.9%,0% ≤ Phosphorus ≤ 0.09%,0.0001% ≤ Titanium ≤ 0.1%,0.0005% ≤ Boron ≤ 0.003%, 0.01% ≤ Niobium ≤ 0.1%, 0 % ≤ Sulfur ≤ 0.09 %, 0 % ≤ Nitrogen ≤ 0.09%, 0% ≤ Vanadium ≤ 0.2%, 0%≤Molybdenum≤0.2%, 0%≤Nickel≤2%, 0% ≤ Copper ≤ 2%, 0% ≤ Calcium ≤ 0.005%, 0% ≤ Cerium ≤ 0.1%, 0% ≤ Magnesium ≦ 0.05%, 0% ≤ Zirconium ≦ 0.05%, the remainder being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet comprising in area fraction, 40% to 60% martensite, 5 to 40% of inter-critical ferrite, a cumulated amount of 10 to 35% of transformed ferrite and bainite and 0% to 5% of residual austenite.

    HIGH SURFACE COMPRESSIVE STRESS FOR THROUGH HARDENING
    37.
    发明申请
    HIGH SURFACE COMPRESSIVE STRESS FOR THROUGH HARDENING 审中-公开

    公开(公告)号：WO2020106319A1

    公开(公告)日：2020-05-28

    申请号：PCT/US2019/027343

    申请日：2019-04-12

    申请人： THE TIMKEN COMPANY

    发明人： PALADUGU, Mohan, Chand

    IPC分类号： C21D1/78 ,  C21D1/20 ,  C21D9/36 ,  C21D9/40

    摘要： A heat treatment process for through hardening results in high surface compressive stresses. The method includes heating a steel component to a first temperature, quenching the steel component to a second temperature, maintaining the steel component at the second temperature for a first duration of time, heating the steel component to a third temperature, maintaining the steel component at the third temperature for a second duration of time, and quenching the steel component to a fourth temperature when austenite to martensite+bainite or bainite transformation is at least 10% but less than 85% complete.

    FORGED PART OF BAINITIC STEEL AND A METHOD OF MANUFACTURING THEREOF
    38.
    发明申请
    FORGED PART OF BAINITIC STEEL AND A METHOD OF MANUFACTURING THEREOF 审中-公开

    公开(公告)号：WO2019180563A1

    公开(公告)日：2019-09-26

    申请号：PCT/IB2019/052125

    申请日：2019-03-15

    申请人： ARCELORMITTAL

    发明人： BORDEREAU, Victor

    IPC分类号： C21D7/13 ,  C21D1/19 ,  C21D1/20 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

    摘要： A steel for forging mechanical parts comprising of the following elements, expressed in percentage by weight: 0.15% ≦C≦ 0.22%; 1.6% ≦Mn≦ 2.2%; 0.6% ≦Si≦ 1%; 1% ≦Cr≦ 1.5%; 0.01%≦Ni≦ 1%; 0% ≦S≦ 0.06%; 0% ≦P≦ 0.02%; 0% ≦N≦ 0.013%; and having optional elements 0% ≦Al≦ 0.06%; 0.03% ≦Mo≦ 0.1%; 0% ≦Cu≦ 0.5%; 0.01% ≦Nb≦ 0.15%; 0.01% ≦Ti≦ 0.03%; 0% ≦V≦ 0.08%; 0.0015% ≦B≦ 0.004%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel having microstructure by area percentage comprising of cumulative presence of residual austenite and martensite-austenite island between 1 % and 20%, the remaining microstructure being bainite having at least 80%, wherein the fraction of grain boundaries of bainite with a misorientation angle of 59.5° are at least 7% and with an optional presence of martensite between 0% and 10%.