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    TOOL FOR PIERCING MILL
    1.
    发明公开
    TOOL FOR PIERCING MILL 有权
    WERKZEUGFÜRLOCHWALZWERK

    公开(公告)号：EP2786813A1

    公开(公告)日：2014-10-08

    申请号：EP12853205.8

    申请日：2012-11-28

    申请人： JFE Steel Corporation

    发明人： ICHINO, Kenji ,  OZAKI, Seiji ,  MOCHIDA, Tetsuo

    IPC分类号： B21B25/04 ,  B21B25/00 ,  C21D9/00 ,  C22C38/00 ,  C22C38/52 ,  C22C38/60

    CPC分类号： C22C38/52 ,  B21B25/00 ,  B21B25/04 ,  C21D1/84 ,  C21D9/00 ,  C21D9/22 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/60 ,  Y10T428/24967

    摘要： A tool for a piercing mill with excellent wear resistance and a method for producing the tool for a piercing mill are provided.
    A scale layer is formed in a surface layer of a substrate steel having a composition containing, on a mass% basis, C: 0.05% to 0.5%, Si: 0.1% to 1.5%, Mn: 0.1% to 1.5%, Cr: 0.1% to 1.5%, Mo: 0.6% to 3.5%, W: 0.5% to 3.5%, and Nb: 0.1% to 1.0% and further containing Co: 0.5% to 3.5% and Ni: 0.5% to 4.0% so as to satisfy 1.0 2 or more of ferrite grains having a maximum length of 1 to 60 µm. Such a microstructure can be formed by performing a scale-forming heat treatment in which, after heating, cooling to at least 700°C is conducted with first rapid cooling and second slow cooling. Thus, the adhesiveness of the scale layer is improved and the lifetime of the tool for a piercing mill is increased.

    摘要翻译： 提供了一种具有优异耐磨性的穿孔机的工具和用于制造穿孔机的工具的方法。 在具有以质量％计含有C：0.05〜0.5％，Si：0.1〜1.5％，Mn：0.1〜1.5％的组成的基体钢的表层形成刻度层，Cr： 0.1〜1.5％，Mo：0.6〜3.5％，W：0.5〜3.5％，Nb：0.1〜1.0％，Co：0.5〜3.5％，Ni：0.5〜4.0％ 满足1.0

    ROLL OUTER LAYER MATERIAL, AND COMPOSITE ROLL FOR HOT ROLLING
    7.
    发明公开
    ROLL OUTER LAYER MATERIAL, AND COMPOSITE ROLL FOR HOT ROLLING 有权
    辊子外层材料和热轧用复合辊

    公开(公告)号：EP2962776A1

    公开(公告)日：2016-01-06

    申请号：EP14756297.9

    申请日：2014-02-25

    申请人： JFE Steel Corporation

    发明人： ICHINO, Kenji ,  MOCHIDA, Tetsuo ,  SHIBATA, Hiromitsu

    IPC分类号： B21B27/00 ,  C22C37/00

    CPC分类号： C22C37/06 ,  B21B27/00 ,  B21B27/03 ,  C22C37/00 ,  C22C37/10

    摘要： Provided is a roll outer layer material for hot rolling and a composite roll for hot rolling which have a surface layers excellent in terms of fatigue resistance and with which fatigue damages and chipping are less likely to occur.
    A roll outer layer material containing small-size carbides having a circle equivalent diameter of 3 to 30 µm in a number of 500 to 2500 pieces/mm 2 and large-size carbides having a circle equivalent diameter of 50 µm or more in a number of 20 pieces/mm 2 or less, preferably having a chemical composition containing, by mass%, C: 2.4% or more and 2.9% or less, Si: 0.2% or more and 1.0% or less, Mn: 0.2% or more and 1.0% or less, Cr: 4.0% or more and 7.5% or less, Mo: 4.0% or more and 6.5% or less, V: 5.3% or more and 7.0% or less, Nb: 0.5% or more and 3.0% or less, and the balance being Fe and inevitable impurities, in which the contents of Cr, Mo, and V satisfy the relationship 1.5 ≤ (Cr+Mo)/V ≤ 2.4, where Cr, Mo, and V respectively represent the contents (mass%) of the corresponding chemical elements, or more preferably having the chemical composition further containing, one or more of Al: 0.001% or more and 0.05% or less and REM: 0.001% or more and 0.03% or less. In addition, a composite roll for hot rolling having an outer layer made of the outer layer material.

    摘要翻译： 本发明提供一种热轧用辊外层材料和热轧用复合轧辊，其具有耐疲劳性优异的表面层，并且不易发生疲劳损伤和碎裂。 含有500〜2500个/ mm 2的当量圆直径为3〜30μm的小尺寸碳化物和20个圆当量直径为50μm以上的大尺寸碳化物的辊外层材料 优选具有以质量％计含有C：2.4％以上且2.9％以下，Si：0.2％以上且1.0％以下，Mn：0.2％以上且1.0％以下的化学组成， Cr：4.0〜7.5％，Mo：4.0〜6.5％，V：5.3〜7.0％，Nb：0.5〜3.0％ ，余量为Fe和不可避免的杂质，其中Cr，Mo和V的含量满足1.5≤（Cr + Mo）/V≤2.4的关系，其中Cr，Mo和V分别表示含量（质量％ ）相应的化学元素，或更优选化学组成进一步含有Al：0.001％以上至0.05％以下和REM：0.001％以上至0.03％以下中的一种或多种。 此外，用于热轧的复合辊具有由外层材料制成的外层。

    OUTER-LAYER MATERIAL FOR HOT-ROLLING ROLL, AND HOT-ROLLING COMPOSITE ROLL
    8.
    发明公开
    OUTER-LAYER MATERIAL FOR HOT-ROLLING ROLL, AND HOT-ROLLING COMPOSITE ROLL 有权
    澳大利亚国防部温哥华威尔士战争

    公开(公告)号：EP2896709A1

    公开(公告)日：2015-07-22

    申请号：EP13837702.3

    申请日：2013-09-06

    申请人： JFE Steel Corporation

    发明人： ICHINO, Kenji ,  MOCHIDA, Tetsuo ,  SHIBATA, Hiromitsu

    IPC分类号： C22C37/00 ,  B21B27/00 ,  C22C37/04 ,  C21D9/38

    摘要： Provided are a surface layer material of a hot rolling mill roll and a hot rolling mill composite roll having high wear resistance, heat shock resistance, and surface deterioration resistance at the same time.
    The surface layer material has a chemical composition containing, by mass%, C: 2.4% or more and 3.5% or less, Si: 1.2% or more and 2.4% or less, Mn: 0.2% or more and 2.0% or less, Cr: 0.8% or more and 2.1% or less, Mo: 0.3% or more and 1.1% or less, Ni: 3.0% or more and 6.0% or less, V: 1.0% or more and 2.2% or less, Nb: 0.1% or more and 0.5% or less, REM: 0.0005% or more and 0.1% or less, Al: 0.003% or more and 0.05% or less, and the balance being Fe and inevitable impurities, in which the contents of C, Cr, V, Nb, REM, and Al satisfy the relationships Cr+0.2 ≤ C-(0.24×V+0.13×Nb) ≤ 3.0 and 0.01 ≤ REM/Al ≤ 3.2 (where C, Cr, V, Nb, REM, and Al respectively represent the contents (mass%) of corresponding chemical elements).

    摘要翻译： 提供同时具有高耐磨性，耐热冲击性和耐表面耐久性的热轧轧辊和热轧轧机复合辊的表层材料。 表层材料具有以质量％计含有C：2.4％以上且3.5％以下，Si：1.2％以上且2.4％以下，Mn：0.2％以上且2.0％以下的化学成分， Cr：0.8％以上且2.1％以下，Mo：0.3％以上且1.1％以下，Ni：3.0％以上且6.0％以下，V：1.0％以上且2.2％以下，Nb： 0.1％以上且0.5％以下，REM：0.0005％以上且0.1％以下，Al：0.003％以上且0.05％以下，余量为Fe和不可避免的杂质，其中C， Cr，V，Nb，REM和Al满足Cr + 0.2‰¤C-（0.24×V + 0.13×Nb）‰‰3.0和0.01‰REM / Al‰¤3.2（其中C，Cr，V， Nb，REM和Al分别表示相应的化学元素的含量（质量％））。

    ROLL SURFACE-LAYER MATERIAL FOR HOT ROLLING WITH EXCELLENT FATIGUE RESISTANCE PRODUCED BY CENTRIFUGAL CASTING, AND COMPOSITE ROLL FOR HOT ROLLING PRODUCED THROUGH CENTRIFUGAL CASTING
    9.
    发明公开
    ROLL SURFACE-LAYER MATERIAL FOR HOT ROLLING WITH EXCELLENT FATIGUE RESISTANCE PRODUCED BY CENTRIFUGAL CASTING, AND COMPOSITE ROLL FOR HOT ROLLING PRODUCED THROUGH CENTRIFUGAL CASTING 有权
    轧制热轧表面涂层材料具有出色的耐疲劳性通过旋铸造上，通过旋铸造制造热轧复合滚轮

    公开(公告)号：EP2770073A1

    公开(公告)日：2014-08-27

    申请号：EP12842076.7

    申请日：2012-10-15

    申请人： JFE Steel Corporation

    发明人： ICHINO, Kenji ,  MOCHIDA, Tetsuo ,  SHIBATA, Hiromitsu

    IPC分类号： C22C37/00 ,  B21B27/00 ,  B22D13/02

    CPC分类号： B21B27/00 ,  B21B27/02 ,  B21B27/032 ,  B22D13/02 ,  B32B15/011 ,  C21D1/25 ,  C21D9/38 ,  C22C37/00 ,  C22C37/06 ,  C22C37/10 ,  Y10T29/49544

    摘要： There is provided a roll surface layer material made by centrifugal casting for a hot rolling mill, the roll surface layer material including a roll surface layer with excellent fatigue resistance. A roll surface layer material made by centrifugal casting has a composition including, on a mass% basis, C: 2.3% to 2.9%, Si: 0.2% to 0.8%, Mn: 0.2% to 1.0%, Cr: 5.0% to 7.5%, Mo: 4.4% to 6.5%, V: 5.3% to 7.0%, Nb: 0.6% to 1.5%, and Co: 0.1% to 4.0% so as to satisfy 14.0 ≤ (Mo + 1.7V) ≤ 17.0 (where Mo represents a content (mass%) of Mo and V represents a content (mass%) of V) and further including Al: 0.001% to 0.03% and/or REM: 0.001% to 0.03%, wherein a carbide is contained at an area fraction of 13% to 40%. Thus, the fatigue resistance of a surface layer is considerably improved. A composite roll obtained by integrally welding a shaft member to the roll surface layer member is treated as a centrifugal cast roll that includes a surface layer with excellent fatigue resistance and is suitable for hot finish rolling mill rolls.

    摘要翻译： 提供了一种通过离心铸造制成的滚动表面层材料为热轧机，滚动表面层材料包含具有优良的耐疲劳性的辊的表面层。 通过离心铸造制成的辊表面层材料具有的组成包括，以质量％计上，C：2.3％至2.9％以下，Si：0.2％〜0.8％以下，Mn：0.2％〜1.0％以下，Cr：5.0％至7.5 ％以下，Mo：4.4％〜6.5％，V：5.3％至7.0％以下，Nb：0.6％〜1.5％，及Co：0.1％至4.0％，以满足14.0‰¤（沫+ 1.7V）‰¤17.0 （其中沫darstellt的Mo含量（质量％）和V darstellt V的含量（质量％）），并且进一步包含Al：0.001％〜0.03％和/或REM：0.001％〜0.03％，worin碳化物载 在上的13％的面积率40％。 因此，表面层的耐疲劳性显着提高。 通过整体焊接的轴部件的滚动面层构件而得到的复合轧辊，被视为一个离心铸造轧辊没有包括具有优异的耐疲劳性的表面层和适合于热精轧机轧辊。