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    Martensitic heat-resisting steel excellent in HAZ-softening resistance and process for producing the same
    1.
    发明授权
    Martensitic heat-resisting steel excellent in HAZ-softening resistance and process for producing the same 失效
    耐HAZ耐软化性优异的马氏体系耐热钢及其制造方法

    公开(公告)号：US5650024A

    公开(公告)日：1997-07-22

    申请号：US513999

    申请日：1995-08-25

    申请人： Yasushi Hasegawa ,  Masahiro Ohgami ,  Nobuo Mizuhashi ,  Hisashi Naoi ,  Toshio Fujita

    发明人： Yasushi Hasegawa ,  Masahiro Ohgami ,  Nobuo Mizuhashi ,  Hisashi Naoi ,  Toshio Fujita

    IPC分类号： C21D6/00 ,  C21D8/02 ,  C21D8/10 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  C21D8/00

    CPC分类号： C22C38/22 ,  C21D6/002 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  C21D2211/008 ,  C21D8/0205 ,  C21D8/10

    摘要： A martensitic heat-resisting steel comprises, in terms of % by mass, 0.01 to 0.30% of C, 0.02 of 0.80% of Si, 0.20 to 1.00% of Mn, 5.00 to 18.00% of Cr, 0.005 to 1.00% of Mo, 0.20 to 3.50% of W, 0.02 to 1.00% of V, 0.01 to 0.50% of Nb, 0.01 to 0.25% of N, and at least one element selected from the group consisting of Ti, Zr, Ta and Hf in an amount of 0.005 to 2.0% for each of the elements, the volume of (Ti %+Zr %+Ta %+Hf %) in the metal component M of M.sub.23 C.sub.6 type carbides therein being from 5 to 65%. The heat-resisting steel is produced by a process comprising the steps ofadding Ti, Zr, Ta and Hf to a molten steel having chemical components as mentioned above, during the period from 10 minutes before completion of refining to completion of refining, casting said molten steel, working the resulting casting, solution treating said worked product, subjecting said worked product to temporary cooling stop at a temperature from 950.degree. to 1,000.degree. C. in the course of cooling said hot worked product, and holding said worked product at the temperature for 5 to 60 minutes. The heat-resisting steel is excellent in HAZ-softening resistance, and exhibits a high creep strength at high temperature of at least 550.degree. C.

    摘要翻译： PCT No.PCT / JP94 / 02302 Sec。 371日期1995年8月25日 102（e）日期1995年8月25日PCT 1994年12月28日PCT公布。 公开号WO95 / 18242 日期：1995年7月6日马氏体系耐热钢以质量％计，含有0.01〜0.30％的C，0.02为0.80％的Si，0.20〜1.00％的Mn，5.00〜18.00％的Cr，0.005〜 1.0％的Mo，0.20〜3.50％的W，0.02〜1.00％的V，0.01〜0.50％的Nb，0.01〜0.25％的N，以及选自Ti，Zr，Ta和 Hf的量为0.005〜2.0％，M23C6型碳化物的金属成分M中的（Ti％+ Zr％+ Ta％+ Hf％）的体积为5〜65％。 耐热钢通过包括以下步骤的方法制造，所述方法包括以下步骤：在完成精炼至完成精炼之前的10分钟期间，将Ti，Zr，Ta和Hf加入到具有上述化学成分的钢水中，将所述 对所得到的铸件进行加工，对所述加工产品进行溶液处理，在冷却所述热加工产品的过程中，使所述加工产品在950℃至1000℃的温度下暂时冷却停止，并将所述加工的产品保持在 温度5〜60分钟。 耐热钢耐HAZ耐软化性优异，高温蠕变强度至少为550℃。

    High strength, ferritic heat-resistant steel having improved resistance to intermetallic compound precipitation-induced embrittlement
    2.
    发明授权
    High strength, ferritic heat-resistant steel having improved resistance to intermetallic compound precipitation-induced embrittlement 失效
    具有改善的耐金属间化合物沉淀诱导脆性的高强度铁素体耐热钢

    公开(公告)号：US5772956A

    公开(公告)日：1998-06-30

    申请号：US722057

    申请日：1996-10-11

    申请人： Yasushi Hasegawa ,  Masahiro Ohgami ,  Hisashi Naoi

    发明人： Yasushi Hasegawa ,  Masahiro Ohgami ,  Hisashi Naoi

    IPC分类号： C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30 ,  C22C38/54

    CPC分类号： C22C38/22 ,  C22C38/001 ,  C22C38/24 ,  C22C38/30

    摘要： A martensitic heat resistant steel is provided which has improved high temperature creep strength, contains Co and, at a temperature of 600.degree. C. or above, does not form an intermetallic compound substantially having a composition of Cr.sub.40 Mo.sub.20 Co.sub.20 W.sub.10 C.sub.2 --Fe. In a heat-resistant steel, containing not less than 8% of Cr, with Co, Mo, and W being simultaneously added thereto, a combination of the addition of a very small of Mg, Ba, Ca, Y, Ce, La and the like, with the addition of a minor amount of Ti and Zr, inhibits the precipitation of an intermetallic compound substantially having a composition of Cr.sub.40 Mo.sub.20 Co.sub.20 W.sub.10 C.sub.2 --Fe, thereby ensuring high temperature creep strength.

    摘要翻译： PCT No.PCT / JP96 / 00319 Sec。 371日期：1996年10月11日 102（e）日期1996年10月11日PCT 1996年2月14日PCT PCT。 公开号WO96 / 25530 日期1996年8月22日提供具有提高的高温蠕变强度的马氏体型耐热钢，其含有Co，并且在600℃以上的温度下，不形成基本上具有Cr40Mo20Co20W10C2-Fe组成的金属间化合物。 在含有不少于8％的Cr的耐热钢中，同时加入Co，Mo和W，结合添加非常小的Mg，Ba，Ca，Y，Ce，La和 通过添加少量的Ti和Zr，抑制了基本上具有Cr40Mo20Co20W10C2-Fe组成的金属间化合物的沉淀，从而确保高温蠕变强度。

    Hot pressing method for high strength member using steel sheet and hot pressed parts
    5.
    发明授权
    Hot pressing method for high strength member using steel sheet and hot pressed parts 有权
    使用钢板和热压部件的高强度部件的热压方法

    公开(公告)号：US07867344B2

    公开(公告)日：2011-01-11

    申请号：US11572020

    申请日：2005-07-15

    申请人： Kazuhisa Kusumi ,  Jun Maki ,  Masayuki Abe ,  Masahiro Ohgami ,  Norihiro Fujita ,  Shinya Nakajima

    发明人： Kazuhisa Kusumi ,  Jun Maki ,  Masayuki Abe ,  Masahiro Ohgami ,  Norihiro Fujita ,  Shinya Nakajima

    IPC分类号： C21D8/02 ,  B32B15/18

    CPC分类号： C23C2/26 ,  C21D1/673 ,  C23C2/28 ,  C23C26/00 ,  Y10T428/12757 ,  Y10T428/12799

    摘要： A method is proved for hot pressing hot rolled steel sheet, cold rolled steel sheet, Al-based plated steel sheet or Zn-based plated steel sheet, where the hot pressed sheet can exhibit a strength of at least about 1200 Mpa, and my be prevented from exhibiting hydrogen embrittlement. The steel sheet may include between about 0.05 to 0.5 wt % C, and/or it may be plated with an Al-based or Zn-based plating material. The steel sheet may be heating to a temperature greater than an Ac3 temperature and not more than about 1100° C. before pressing. An atmosphere can be provided during heating which contains not more than about 6 vol % of hydrogen and a dew point of not more than about 10° C. The exemplary methods may be used to form high strength parts which may be used, e.g., in automobiles.

    摘要翻译： 证明了热压热轧钢板，冷轧钢板，Al系镀钢板或Zn系镀层钢板的热压板的强度至少为约1200Mpa的方法， 防止氢脆化。 钢板可以包括约0.05至0.5重量％的C，和/或其可以镀有Al基或Zn基镀层材料。 在压制之前，钢板可能被加热到大于Ac 3温度且不大于约1100℃的温度。 可以在加热期间提供含有不超过约6体积％氢气和露点不超过约10℃的气氛。示例性方法可用于形成高强度部件，其可以用于例如 汽车

    Hot pressing method for high strength member using steel sheet and hot pressed parts
    6.
    发明申请
    Hot pressing method for high strength member using steel sheet and hot pressed parts 有权
    使用钢板和热压部件的高强度部件的热压方法

    公开(公告)号：US20070163685A1

    公开(公告)日：2007-07-19

    申请号：US11572020

    申请日：2005-07-15

    申请人： Kazuhisa Kusumi ,  Jun Maki ,  Masayuki Abe ,  Masahiro Ohgami ,  Norihiro Fujita ,  Shinya Nakajima

    发明人： Kazuhisa Kusumi ,  Jun Maki ,  Masayuki Abe ,  Masahiro Ohgami ,  Norihiro Fujita ,  Shinya Nakajima

    IPC分类号： C21D8/02

    CPC分类号： C23C2/26 ,  C21D1/673 ,  C23C2/28 ,  C23C26/00 ,  Y10T428/12757 ,  Y10T428/12799

    摘要： The present invention provides a method of hot pressing using hot rolled and cold rolled steel sheet or Al-based plated steel sheet or Zn-based plated steel sheet enabling a strength of at least 1200 MPa to be obtained after high temperature forming and with extremely little possibility of hydrogen embrittlement and such hot pressed parts, that is, a method of hot pressing a high strength automobile parts comprising using steel sheet containing as steel compositions by wt % C:0.05 to 0.5% or steel sheet plated mainly with Al or Zn to produce automobile members by hot pressing during which making the heating temperature before pressing Ac3 or more to 1100° C. or less, making the hydrogen concentration in the heating atmosphere 6 vol % or less, and making the dew point 10° C. or less and such hot pressed parts.

    摘要翻译： 本发明提供一种使用热轧冷轧钢板或Al系镀覆钢板或Zn系镀覆钢板进行热压的方法，其能够在高温成形后获得至少1200MPa的强度，并且极少量 氢脆化的可能性和这种热压部件，即将包含以C = 0.05〜0.5％的钢组成的钢板或以Al或Zn为主体的钢板进行热压的高强度汽车部件的方法， 通过热压制造汽车部件，在此温度下使加热温度为3℃以上至1100℃以下，使加热气氛中的氢浓度为6体积％以下， 露点10℃以下，这样的热压部件。