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    Steel pipe having high ductility and high strength and process for production thereof
    43.
    发明授权
    Steel pipe having high ductility and high strength and process for production thereof 有权
    具有高延展性和高强度的钢管及其生产方法

    公开(公告)号：US06331216B1

    公开(公告)日：2001-12-18

    申请号：US09214226

    申请日：1998-12-30

    Applicant: Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

    Inventor： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

    IPC: C21D713

    CPC classification number: C21D8/10 ,  C21D2201/00 ,  C21D2211/005

    Abstract: The steel pipe has a structure composed mainly of ferrite or ferrite plus pearlite or ferrite plus cementite. The steel pipe is characterized by grain size not greater than 3 &mgr;m, preferably not greater than 1 &mgr;m, elongation greater than 20%, tensile strength (TS:MPa) and elongation (E1:%) whose product is greater than 10000, and percent ductile fracture greater than 95%, preferably 100%, measured by Charpy impact test on an actual pipe at −100° C. The structure is characterized by C: 0.005-0.03%, Si: 0.01-3.0%, Mn: 0.01-2.0%, and Al: 0.001-0.10% on a weight basis, and is composed of ferrite or ferrite and a secondary phase, with ferrite grains being not greater than 3 &mgr;m and the secondary phase having an areal ratio not more than 30%. A steel pipe stock having the above-mentioned composition is heated at a temperature of (Ac1+50° C.) to 400° C. and subsequently reduced at a rolling temperature of (Ac1+50° C.) to 400° C. such that the cumulative reduction of diameter is greater than 20%. The reducing is preferably performed such that at least one of rolling passes reduces the diameter by more than 6% per pass. The steel pipe will have high ductility and high strength and will be superior in toughness and stress corrosion cracking resistance, if the content of C, Si, Mn, and other alloying elements is limited low and reducing is performed at the temperature specified above. The resulting steel pipe has good fatigue resistance and is suitable for use as line pipe.

    Abstract translation: 钢管具有主要由铁素体或铁素体加珠光体或铁素体和渗碳体组成的结构。 钢管的特征在于，其粒径不大于3μm，优选不大于1μm，伸长率大于20％，拉伸强度（TS：MPa）和伸长率（E1：％）大于10000， 延性断裂大于95％，优选100％，通过夏比冲击试验在-100℃的实际管上测量。该结构的特征在于C：0.005-0.03％，Si：0.01-3.0％，Mn：0.01-2.0 ％，Al：0.001-0.10％，由铁素体或铁素体和二次相组成，铁素体晶粒不大于3μm，第二相的面积比不大于30％。 将具有上述组成的钢管坯料在（Ac1 + 50℃）的温度下加热至400℃，随后在（Ac1 + 50℃）的轧制温度下降低至400℃。 使得直径的累积减小大于20％。 优选地进行还原，使得至少一个轧制通道将直径每次通过减少6％以上。 如果C，Si，Mn和其他合金元素的含量低，并且在上述规定的温度下进行还原，则钢管将具有高延展性和高强度，并且在韧性和耐应力腐蚀开裂性方面优异。 所得钢管具有良好的抗疲劳性能，适用于管线管。

    Super fine granular steel pipe and method for producing the same
    44.
    发明申请
    Super fine granular steel pipe and method for producing the same 审中-公开
    超细粒状钢管及其制造方法

    公开(公告)号：US20010027831A1

    公开(公告)日：2001-10-11

    申请号：US09771589

    申请日：2001-01-30

    Applicant: Kawasaki Steel Corporation

    Inventor： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Taro Kanayama ,  Masahiko Morita ,  Saiji Matsuoka ,  Nobuki Tanaka ,  Osamu Furukimi ,  Takaaki Hira

    IPC: C22C038/44

    CPC classification number: C21D8/10 ,  C21D2201/00

    Abstract: A steel pipe containing fine ferrite crystal grains, which has excellent toughness and ductility and good ductility-strength balance as well as superior collision impact resistance, and a method for producing the same are provided. A steel pipe containing super-fine crystal grains can be produced by heating a base steel pipe having ferrite grains with an average crystal diameter of di (nullm), in which C, Si, Mn and Al are limited within proper ranges, and if necessary, Cu, Ni, Cr and Mo, or Nb, Ti, V, B, etc. are further added, at not higher than the Ac3 transformation point, and applying reducing at an average rolling temperature of nullm (null C.) and a total reduction ratio Tred (%) within s temperature range of from 400 to Ac3 transformation point, with di, nullm and Tred being in a relation satisfying a prescribed equation.

    Abstract translation: 提供了具有优异的韧性和延展性以及良好的延展性 - 强度平衡以及优异的抗冲击冲击性的细铁素体晶粒的钢管及其制造方法。 含有超细晶粒的钢管可以通过加热具有平均晶体直径为二（母）的铁素体晶粒的基础钢管，其中C，Si，Mn和Al被限制在适当的范围内，如果需要 进一步添加Cu，Ni，Cr和Mo，或Nb，Ti，V，B等，不高于Ac 3相变点，并以平均轧制温度（℃）和 总减速比Tred（％）在400〜Ac3相变点的s温度范围内，di，thetam和Tred处于满足规定方程的关系。

    Surface treatment of a metal part
    47.
    发明授权
    Surface treatment of a metal part 有权
    金属部件的表面处理

    公开(公告)号：US09382609B2

    公开(公告)日：2016-07-05

    申请号：US14126602

    申请日：2012-06-18

    Applicant: Tony Prezeau ,  Teddy Muller ,  Michel Baron ,  Joan Samuel ,  Emmanuel Dransart

    Inventor： Tony Prezeau ,  Teddy Muller ,  Michel Baron ,  Joan Samuel ,  Emmanuel Dransart

    IPC: C23C8/02 ,  C23C8/32 ,  C23C8/38 ,  C21D7/06 ,  C23C8/76 ,  B82Y30/00 ,  C21D7/04

    CPC classification number: C23C8/76 ,  B82Y30/00 ,  C21D7/04 ,  C21D7/06 ,  C21D2201/00 ,  C21D2201/03 ,  C21D2211/004 ,  C23C8/02 ,  C23C8/32 ,  C23C8/38

    Abstract: A process for the surface treatment of a metal part comprises:exposing a surface (1) of the metal part to a stream of substantially spherical particles, so that any portion of said surface receives said particles along several primary incidences, the primary incidences of the particles on a portion of the surface being essentially distributed in a cone or a conical film which has an outer half apex angle between 10° and 45°, until a surface layer (3) of nanostructures having an average thickness of several tens of microns is obtained, the particles having a diameter of less than 2 mm and greater than 0.1 mm and being projected at a speed between 40 m/s and 100 m/s. A thermochemical treatment is then applied, in particular a low-temperature treatment of the nitriding type or a high-temperature treatment of the low-pressure carbonitriding type.

    Abstract translation: 用于金属部件的表面处理的方法包括：将金属部件的表面（1）暴露于基本上为球形的颗粒的流中，使得所述表面的任何部分沿着几个主要入射点接收所述颗粒，主要发生 表面部分上的颗粒基本上分布在具有10°至45°之间的外半顶角的圆锥或圆锥形膜中，直到具有几十微米平均厚度的纳米结构的表面层（3）为 所述颗粒具有小于2mm且大于0.1mm的直径并以40m / s至100m / s的速度投影。 然后进行热化学处理，特别是氮化型的低温处理或低压碳氮共渗型的高温处理。

    METHOD OF PRODUCING A NANO-TWINNED TITANIUM MATERIAL BY CASTING
    49.
    发明申请
    METHOD OF PRODUCING A NANO-TWINNED TITANIUM MATERIAL BY CASTING 审中-公开
    通过铸造生产纳米二氧化钛材料的方法

    公开(公告)号：US20150034216A1

    公开(公告)日：2015-02-05

    申请号：US13996243

    申请日：2011-12-21

    Applicant: Guocai Chai

    Inventor： Guocai Chai

    IPC: C22F1/18

    CPC classification number: C22F1/183 ,  C21D6/04 ,  C21D2201/00

    Abstract: A method of producing a nano twinned commercially pure titanium material includes the step of casting a commercially pure titanium material, that apart from titanium, contains not more than 0.05 wt % N; not more than 0.08 wt % C; not more than 0.015 wt % H; not more than 0.50 wt % Fe; not more than 0.40 wt % O; and not more than 0.40 wt % residuals. The material is brought to a temperature at or below 0° C. and plastic deformation is imparted to the material at that temperature to such a degree that nano twins are formed in the material.

    Abstract translation: 制造纳米双重商业纯钛材料的方法包括铸造商业纯钛材料的步骤，除钛之外，钛材料含有不多于0.05重量％的N; 不超过0.08重量％C; 不大于0.015wt％H; 不超过0.50重量％的Fe; 不大于0.40重量％的O; 和不大于0.40重量％的残留物。 将材料置于等于或低于0℃的温度下，在该温度下向材料施加塑性变形，使得材料中形成纳米双胞胎。

    SURFACE TREATMENT OF A METAL PART
    50.
    发明申请
    SURFACE TREATMENT OF A METAL PART 有权
    金属部件的表面处理

    公开(公告)号：US20140166160A1

    公开(公告)日：2014-06-19

    申请号：US14126602

    申请日：2012-06-18

    Applicant: Tony Prezeau ,  Teddy Muller ,  Michel Baron ,  Joan Samuel ,  Emmanuel Dransart

    Inventor： Tony Prezeau ,  Teddy Muller ,  Michel Baron ,  Joan Samuel ,  Emmanuel Dransart

    IPC: C23C8/76

    CPC classification number: C23C8/76 ,  B82Y30/00 ,  C21D7/04 ,  C21D7/06 ,  C21D2201/00 ,  C21D2201/03 ,  C21D2211/004 ,  C23C8/02 ,  C23C8/32 ,  C23C8/38

    Abstract: A process for the surface treatment of a metal part comprises: exposing a surface (1) of the metal part to a stream of substantially spherical particles, so that any portion of said surface receives said particles along several primary incidences, the primary incidences of the particles on a portion of the surface being essentially distributed in a cone or a conical film which has an outer half apex angle between 10° and 45°, until a surface layer (3) of nanostructures having an average thickness of several tens of microns is obtained, the particles having a diameter of less than 2 mm and greater than 0.1 mm and being projected at a speed between 40 m/s and 100 m/s. A thermochemical treatment is then applied, in particular a low-temperature treatment of the nitriding type or a high-temperature treatment of the low-pressure carbonitriding type.

    Abstract translation: 用于金属部件的表面处理的方法包括：将金属部件的表面（1）暴露于基本上为球形的颗粒的流中，使得所述表面的任何部分沿着几个主要入射点接收所述颗粒，主要发生 表面部分上的颗粒基本上分布在具有10°至45°之间的外半顶角的圆锥或圆锥形膜中，直到具有几十微米平均厚度的纳米结构的表面层（3）为 所述颗粒具有小于2mm且大于0.1mm的直径并以40m / s至100m / s的速度投影。 然后进行热化学处理，特别是氮化型的低温处理或低压碳氮共渗型的高温处理。

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