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    High-strength hot-rolled steel sheet having excellent stretch flangeability, and method of producing the same
    32.
    发明授权
    High-strength hot-rolled steel sheet having excellent stretch flangeability, and method of producing the same 有权
    拉伸凸缘性优异的高强度热轧钢板及其制造方法

    公开(公告)号：US06364968B1

    公开(公告)日：2002-04-02

    申请号：US09586421

    申请日：2000-06-02

    Applicant: Eiko Yasuhara ,  Akio Tosaka ,  Osamu Furukimi ,  Takao Uchiyama ,  Nobuo Yamada

    Inventor： Eiko Yasuhara ,  Akio Tosaka ,  Osamu Furukimi ,  Takao Uchiyama ,  Nobuo Yamada

    IPC: C22C3814

    CPC classification number: C21D1/20 ,  C21D8/0226 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

    Abstract: The invention provides a thin high-strength hot-rolled steel sheet with a thickness of not more than 3.5 mm which has excellent stretch flangeability and high uniformity in both shape and mechanical properties of the steel sheet, as well as a method of producing the hot-rolled steel sheet. A slab containing C: 0.05-0.30 wt %, Si: 0.03-1.0 wt %, Mn: 1.5-3.5 wt %, P: not more than 0.02 wt %, S: not more than 0.005 wt %, Al: not more than 0.150 wt %, N: not more than 0.0200 wt %, and one or two of Nb: 0.003-0.20 wt % and Ti: 0.005-0.20 wt % is heated at a temperature of not higher than 1200° C. The slab is hot-rolled at a finish rolling end temperature of not lower than 800° C., preferably at a finish rolling start temperature of 950-1050° C. A hot-rolled sheet is started to be cooled within two seconds after the end of the rolling, and then continuously cooled down to a coiling temperature at a cooling rate of 20-150° C./sec. The hot-rolled sheet is coiled at a temperature of 300-550° C., preferably in excess of 400° C. A fine bainite structure is obtained in which the mean grain size is not greater than 3.0 &mgr;m, the aspect ratio is not more than 1.5, and preferably the maximum size of the major axis is not greater than 10 &mgr;m.

    Abstract translation: 本发明提供一种厚度不大于3.5mm的薄的高强度热轧钢板，其在钢板的形状和机械性能方面具有优异的拉伸凸缘性和高均匀性，以及制造热 卷钢板 含有C：0.05-0.30重量％，Si：0.03-1.0重量％，Mn：1.5-3.5重量％，P：不大于0.02重量％的S：不大于0.005重量％的Al：不大于 0.150重量％，N：不大于0.0200重量％，Nb：0.003-0.20重量％和Ti：0.005-0.20重量％中的一个或两个在不高于1200℃的温度下加热。 在终轧温度不低于800℃，优选在950-1050℃的精轧起始温度下进行。在轧制结束后2秒钟内开始冷轧热轧板 ，然后以20-150℃/秒的冷却速度连续冷却至卷取温度。 热轧板在300-550℃，优选超过400℃的温度下卷绕。得到平均粒径不大于3.0μm的细贝氏体组织，纵横比不是 大于1.5，优选长轴的最大尺寸不大于10um。

    High-strength high-workability cold rolled steel sheet having excellent impact resistance
    33.
    发明授权
    High-strength high-workability cold rolled steel sheet having excellent impact resistance 有权
    耐冲击性优异的高强度高加工性冷轧钢板

    公开(公告)号：US06210496B1

    公开(公告)日：2001-04-03

    申请号：US09230888

    申请日：1999-02-12

    Applicant: Syusaku Takagi ,  Kazuya Miura ,  Osamu Furukimi ,  Kei Sakata ,  Takashi Obara

    Inventor： Syusaku Takagi ,  Kazuya Miura ,  Osamu Furukimi ,  Kei Sakata ,  Takashi Obara

    IPC: C22C3802

    CPC classification number: C22C38/38 ,  C22C38/34

    Abstract: A cold rolled steel sheet having high strength and high formability and having excellent crushing performance can include 0.05-0.40 mass % of C, 1.0-3.0 mass % of Si, 0.6-3.0 mass % of Mn, 0.02-1.5 mass % of Cr, 0.010-0.20 mass % of P and 0.01-0.3 mass % of Al, with the remainder consisting essentially of Fe. The steel sheet includes a ferrite major phase and a minor phase consisting of martensite, acicular ferrite and retained austenite. The cold rolled steel sheet can be used in automobiles.

    Abstract translation: 具有强度高，成形性高，破碎性能优异的冷轧钢板可以包括C：0.05〜0.40质量％，Si：1.0〜3.0质量％，Mn：0.6〜3.0质量％，Cr：0.02〜1.5质量％ P为0.010〜0.20质量％，Al为0.01-0.3质量％，余量基本上由Fe组成。 钢板包括铁素体主相和由马氏体，针状铁素体和残余奥氏体组成的次相。 冷轧钢板可以用于汽车。

    Hot rolled steel sheets and method of producing the same
    34.
    发明授权
    Hot rolled steel sheets and method of producing the same 失效
    热轧钢板及其制造方法

    公开(公告)号：US5853503A

    公开(公告)日：1998-12-29

    申请号：US817947

    申请日：1997-04-28

    Applicant: Kazuhiro Seto ,  Kei Sakata ,  Osamu Furukimi ,  Takashi Obara

    Inventor： Kazuhiro Seto ,  Kei Sakata ,  Osamu Furukimi ,  Takashi Obara

    IPC: B21B1/22 ,  B21B1/26 ,  B21B45/08 ,  C21D8/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/14 ,  C22C38/04

    CPC classification number: C22C38/06 ,  B21B45/08 ,  C21D8/0226 ,  C21D8/0278 ,  B21B1/227 ,  B21B1/26

    Abstract: After a starting material of steel comprising C: 0.001-0.20 wt %, Si: 0.01-0.50 wt %, Mn: 0.05-2.0 wt %, P: not more than 0.05 wt %, S: not more than 0.05 wt %, sol.Al: 0.01-0.10 wt %, N: not more than 0.020 wt % and the balance being Fe and inevitable impurities is heated above AC.sub.3 point, rough rolling is completed within a temperature range of (Ar.sub.3 point+100.degree. C.)-(Ar.sub.3 point+50.degree. C.), and super-high pressure descaling is carried out under conditions satisfying a jetting pressure of not less than 25 kgf/cm.sup.2 and a liquid quantity density of not less than 0.002 liter/cm.sup.2, and subsequently finish rolling at a rolling reduction of not less than 80% above Ar.sub.3 point of a rolling completion temperature is started in 5 seconds and coiling is carried out below 700.degree. C., whereby hot rolled steel sheets having a surface roughness Ra of not more than 0.8 .mu.m and an average scale thickness of not more than 4 .mu.m is produced and the adhesion property in case of subjecting to shaping at a mill scale state and the pickling efficiency in case of applying to pickling are improved.

    Abstract translation: PCT No.PCT / JP96 / 02455 Sec。 371日期1997年04月28日 102（e）日期1997年4月28日PCT提交1996年8月30日PCT公布。 出版物WO97 / 08355 日期1997年3月6日在C：0.001-0.20重量％，Si：0.01-0.50重量％，Mn：0.05-2.0重量％，P：不大于0.05重量％的钢的起始原料之后，S：不大于 0.05重量％，sol.Al：0.01-0.10重量％，N：不大于0.020重量％，余量为Fe和不可避免的杂质被加热到AC3以上，在（Ar3点+ 100）的温度范围内完成粗轧 ℃） - （Ar3点+ 50℃），超高压除鳞在满足不低于25kgf / cm 2的喷射压力和不小于0.002升/分钟的液体密度的条件下进行， cm2，然后在5秒钟内开始轧制完成温度以上Ar3以上80％以上的压延成形，在700℃以下进行卷取，得到具有表面粗糙度Ra的热轧钢板 不大于0.8μm，平均刻度厚度不大于4μm，并且在经受t o在轧制规模状态下成型，并且在施加酸洗的情况下的酸洗效率得到改善。

    Alloy steel powders for sintered bodies having high strength, high fatigue strength and high toughness, sintered bodies, and method for manufacturing such sintered bodies
    35.
    发明授权
    Alloy steel powders for sintered bodies having high strength, high fatigue strength and high toughness, sintered bodies, and method for manufacturing such sintered bodies 失效
    具有高强度，高疲劳强度和高韧性的烧结体的合金钢粉末，烧结体及其制造方法

    公开(公告)号：US5666634A

    公开(公告)日：1997-09-09

    申请号：US360762

    申请日：1994-12-23

    Applicant: Shigeru Unami ,  Osamu Furukimi

    Inventor： Shigeru Unami ,  Osamu Furukimi

    IPC: C22C33/02 ,  C22C38/00 ,  C22C38/22 ,  B22F3/12 ,  B22F5/08 ,  C22C1/04

    CPC classification number: C22C33/0264 ,  B22F2998/00 ,  Y10S75/95

    Abstract: The invention has for its object the provision alloy steel powders for Cr-based high strength sintered bodies having high tensile strength, fatigue strength and toughness which are adapted for use in parts for motor vehicles and parts for OA apparatus.The composition of the alloy steel powder comprises, by wt %, not larger than 0.1% of C, not larger than 0.08% of Mn, 0.5-3% of Cr, 0.1-2% of Mo, not larger than 0.01% of S, not larger than 0.01% of P, not larger than 0.2% of O, optionally one or more of 0.2.about.2.5% Ni, 0.5.about.2.5% Cu and the balance being inevitable impurities and Fe. The sintered body has substantially the same composition provided that the content of C alone is limited to 0.2-1.2%.The manufacturing method comprises molding the above alloy steel powder, sintering the resulting green compact at a temperature of 1100.degree.-1300.degree. C. and immediately cooling at a cooling rate of 10.degree.-200.degree. C./minute. The sintered product may be further subjected to carburization and heat-treatments.

    Abstract translation: PCT No.PCT / JP93 / 01141 Sec。 371日期1994年12月23日第 102（e）日期1994年12月23日PCT提交1993年8月12日PCT公布。 WO94 / 27764 PCT出版物 日本公开1994年12月8日本发明的目的是提供适用于机动车辆零件和OA装置的零件的具有高拉伸强度，疲劳强度和韧性的Cr系高强度烧结体用合金钢粉末。 合金钢粉末的组成按重量％计不超过0.1％，不大于0.08％的Mn，0.5-3％的Cr，0.1-2％的Mo，不大于0.01％的S ，不大于0.01％的P，不大于0.2的O，任选地一种或多种0.2差异2.5％Ni，0.5％差异2.5％Cu，余量是不可避免的杂质和Fe。 烧结体具有基本上相同的组成，只要将C的含量限制在0.2-1.2％。 制造方法包括将上述合金钢粉末成型，在1100〜1300℃的温度下烧结得到的生坯，并以10℃-200℃/分钟的冷却速度立即冷却。 可以对烧结体进一步进行渗碳和热处理。

    Stainless steel sheet with excellent heat and corrosion resistances for brake disk
    37.
    发明授权
    Stainless steel sheet with excellent heat and corrosion resistances for brake disk 有权
    不锈钢板对制动盘具有优良的耐热和耐腐蚀性能

    公开(公告)号：US08852361B2

    公开(公告)日：2014-10-07

    申请号：US11794966

    申请日：2005-10-20

    Applicant: Junichiro Hirasawa ,  Takumi Ujiro ,  Osamu Furukimi

    Inventor： Junichiro Hirasawa ,  Takumi Ujiro ,  Osamu Furukimi

    IPC: C22C38/00 ,  F16D65/12

    CPC classification number: F16D65/125 ,  F16D2200/0017 ,  F16D2200/0021

    Abstract: A stainless steel sheet with excellent heat and corrosion resistances for a brake disk is provided. Specifically, in mass %, C: less than 0.10%, Si: 1.0% or less, Mn: 1.0 to 2.5%, P: 0.04% or less, S: 0.01% or less, Cr: more than 11.5% but not more than 15.0%, Ni: 0.1 to 1.0%, Al: 0.10% or less, Nb: more than 0.08% but not more than 0.6%, V: 0.02 to 0.3%, and N: more than 0.03% but not more than 0.10% are contained so that 0.03≦{C+N−(13/93)Nb}≦0.10, (5Cr+10Si+15Mo+30Nb+50V−9Ni−5Mn−3Cu−225N−270C)≦45, and {(14/50)V+(14/90)Nb}

    Abstract translation: 提供了一种对制动盘具有优异耐热腐蚀性能的不锈钢板。 具体地，以质量％计，C：小于0.10％，Si：1.0％以下，Mn：1.0〜2.5％，P：0.04％以下，S：0.01％以下，Cr：超过11.5％ ，15.0％以下，Ni：0.1〜1.0％，Al：0.10％以下，Nb：0.08％以上0.6％以下，V：0.02〜0.3％，N：0.03以上0.10以下 含有0.03和n C; N（C + N - （13/93）Nb}＆nlE; 0.10，（5Cr + 10Si + 15Mo + 30Nb + 50V-9Ni-5Mn-3Cu-225N-270C） {（14/50）V +（14/90）Nb}

    Soft Cr-containing steel
    38.
    再颁专利
    Soft Cr-containing steel 有权
    含软含铬钢

    公开(公告)号：USRE44709E1

    公开(公告)日：2014-01-21

    申请号：US12465286

    申请日：2009-05-13

    Applicant: Atsushi Miyazaki ,  Junichiro Hirasawa ,  Mineo Muraki ,  Yoshihiro Yazawa ,  Osamu Furukimi

    Inventor： Atsushi Miyazaki ,  Junichiro Hirasawa ,  Mineo Muraki ,  Yoshihiro Yazawa ,  Osamu Furukimi

    IPC: C22C38/44 ,  C22C38/48

    CPC classification number: C22C38/48 ,  C21D6/004 ,  C21D6/02 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46

    Abstract: The soft Cr-containing steel includes, on a % by mass basis, C: from about 0.001% to about 0.020%, Si: more than about 0.10% and less than about 0.50%, Mn: less than about 2.00%, P: less than about 0.060%, S: less than about 0.008%, Cr: from about 12.0% to about 16.0%, Ni: from about 0.05% to about 1.00%, N: less than about 0.020%, Nb: from about 10×(C+N) to about 1.00%, Mo: more than about 0.80% and less than about 3.00%, wherein the contents of alloying elements, represented by Si and Mo, respectively, on a % by mass, satisfy the formula Si≦1.2-0.4 Mo, so as to prevent precipitation of the Laves phase and to stably secure an effect of increasing high-temperature strength due to solid solution Mo.

    Abstract translation: 含有软Cr的钢包括以质量％计，C：约0.001％至约0.020％，Si：大于约0.10％且小于约0.50％，Mn：小于约2.00％，P： 小于约0.060％，S：小于约0.008％，Cr：约12.0％至约16.0％，Ni：约0.05％至约1.00％，N：小于约0.020％，Nb：约10× （C + N）至约1.00％，Mo：大于约0.80％且小于约3.00％，其中由Si和Mo表示的合金元素的含量分别为质量％满足式Si @ 1.2-0.4 Mo，以防止Laves相沉淀，并稳定地确保由于固溶Mo而使高温强度提高的效果。

    Heat-resistant ferritic stainless steel and method for production thereof
    39.
    发明授权
    Heat-resistant ferritic stainless steel and method for production thereof 有权
    耐热铁素体不锈钢及其制造方法

    公开(公告)号：US07806993B2

    公开(公告)日：2010-10-05

    申请号：US10512782

    申请日：2003-06-02

    Applicant: Atsushi Miyazaki ,  Kenji Takao ,  Osamu Furukimi

    Inventor： Atsushi Miyazaki ,  Kenji Takao ,  Osamu Furukimi

    IPC: C22C38/22 ,  C22C38/48 ,  C21D8/04

    CPC classification number: C21D8/1222 ,  C21D6/002 ,  C21D8/1233 ,  C21D9/08 ,  C21D2211/005 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

    Abstract: The present invention provides a ferritic stainless steel that has excellent strength at high temperature, oxidation resistance at high temperature, and salt corrosion resistance at high temperature and that can be used under high temperatures exceeding 900° C., and a method of producing the same.Specifically, the composition thereof is adjusted, on a % by mass basis, so as to include C: 0.02% or less; Si: 2.0% or less; Mn: 2.0% or less; Cr: from 12.0 to 40.0%; Mo: from 1.0 to 5.0%; W: more than 2.0% and 5.0% or less; wherein the total content of Mo and W: (Mo+W)≧4.3%, Nb: from 5 (C+N) to 1.0%, N: 0.02% or less, and Fe and inevitable impurities as residual.

    Abstract translation: 本发明提供了一种在高温下具有优异的强度，高温下的耐氧化性和高温下的耐盐腐蚀性并且可以在高于900℃的高温下使用的铁素体不锈钢及其制造方法 。 具体而言，将其组成以质量％为基准进行调整，包括C：0.02％以下， Si：2.0％以下; Mn：2.0％以下; Cr：12.0〜40.0％ Mo：1.0〜5.0％ W：超过2.0％和5.0％以下; 其中Mo和W：（Mo + W）≥4.3％，Nb：5（C + N）至1.0％，N：0.02％以下，以及Fe和不可避免的杂质作为残留物的总含量。

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