Duplex stainless steel
    1.
    发明授权
    Duplex stainless steel 失效
    双相不锈钢

    公开(公告)号:US5849111A

    公开(公告)日:1998-12-15

    申请号:US718574

    申请日:1996-11-06

    IPC分类号: C22C38/00 C22C38/44 C22C38/58

    CPC分类号: C22C38/44 C22C38/001

    摘要: A super duplex stainless steel with low susceptibility to weld cracks and high weldability, as well as the resistance to stress corrosion cracking and toughness of the weld zones. The steel is therefore suitable for a wide range of applications including heat exchangers exposed to sea water, brine-resistant equipment and structures, pipings in chemical plants, line pipes, and oil well pipes. The steel includes, in weight %, 2.0% or less Si, 2.0% or less Mn, 22.0-24.0% Cr, 4.5-6.5% Ni, 4.0-4.8% Mo, 0.001-0.15% Al, and 0.25-0.35% N, the remains of Fe and inevitable impurities including 0.03% or less C, 0.05% or less P and 0.005% or less S, and a RVS, the index of susceptibility to cracking on welding, 7 or less, and a PREW, the index of pitting resistance, greater than 40.

    摘要翻译: PCT No.PCT / JP95 / 00647 Sec。 371日期:1996年11月6日 102(e)日期1996年11月6日PCT 1995年4月4日PCT PCT。 公开号WO95 / 27090 日期1995年10月12日一种具有低焊接裂纹敏感性和高可焊性的超级双相不锈钢,以及耐应力腐蚀开裂和焊接区韧性。 因此,钢适用于广泛的应用,包括暴露于海水的热交换器,防盐水设备和结构,化工厂的管道,管道管道和油井管道。 钢的重量%包括2.0%以下的Si,2.0%以下的Mn,22.0-24.0%的Cr,4.5-6.5%的Ni,4.0-4.8%的Mo,0.001-0.15%的Al和0.25-0.35%的N ,余量为Fe和不可避免的杂质,包括0.03%以下的C,0.05%以下的P和0.005%以下的S,RVS,焊接开裂敏感性指数为7以下,PREW, 的耐点蚀性,大于40。

    High-strength welded steel structures having excellent corrosion
resistance
    2.
    发明授权
    High-strength welded steel structures having excellent corrosion resistance 失效
    具有优异耐腐蚀性的高强度焊接钢结构

    公开(公告)号:US6129999A

    公开(公告)日:2000-10-10

    申请号:US43649

    申请日:1998-03-25

    摘要: Welded high-strength steel structure with excellent SSC and corrosion resistance in a wet carbon dioxide environment having a low H.sub.2 S concentration. A structure having a Vickers hardness of at most 350 and a joint tensile strength of at least 620 MPa and composed of a base metal comprising a martensitic stainless steel with a martensitic or tempered martensitic structure containing 0.001 to 0.05% C and 9 to 14% Cr and a weld metal comprising an austenitic-ferritic stainless steel having a duplex structure composed of austenite and 35 to 75% by volume of ferrite and containing 22 to 27% Cr,7 to 11% Ni and 1.5 to 5% Mo, and at most 0.03% C as an impurity.

    摘要翻译: PCT No.PCT / JP96 / 02834 Sec。 371日期:1998年3月25日 102(e)1998年3月25日PCT PCT 1996年9月27日PCT公布。 出版物WO97 / 12072 日期1997年04月3日在H2S浓度较低的湿二氧化碳环境中焊接高强度钢结构,具有优异的耐SSC和耐腐蚀性。 维氏硬度为350以下,断裂强度为620MPa以上的结构,由含有马氏体或回火马氏体组织的马氏体系不锈钢构成的基体金属含有0.001〜0.05%的C和9〜14%的Cr 以及包含奥氏体 - 铁素体不锈钢的焊接金属,其具有由奥氏体和35〜75体积%的铁素体构成的双相组织,含有22〜27%的Cr,7〜11%的Ni和1.5〜5%的Mo,最多 0.03%C为杂质。

    METHOD FOR PRODUCING HIGH-STRENGTH Cr-Ni ALLOY SEAMLESS PIPE
    3.
    发明申请
    METHOD FOR PRODUCING HIGH-STRENGTH Cr-Ni ALLOY SEAMLESS PIPE 审中-公开
    生产高强度Cr-Ni合金无缝管的方法

    公开(公告)号:US20120031534A1

    公开(公告)日:2012-02-09

    申请号:US13245110

    申请日:2011-09-26

    IPC分类号: C21D9/08 C21D6/00

    CPC分类号: C21D8/10 C21D6/004 C22C1/002

    摘要: A method for producing a high-strength Cr—Ni alloy seamless pipe comprising preparing an alloy billet with a chemical composition consisting, by mass %, of C: 0.05% or less, Si: 1.0% or less, Mn: less than 3.0%, P: 0.005% or less, S: 0.005% or less, Cu: 0.01 to 4.0%, Ni: 25% or more and less than 35%, Cr: 20 to 30%, Mo: 0.01% or more and less than 4.0%, N: 0.10 to 0.30%, Al: 0.03 to 0.30%, O (oxygen): 0.01% or less, REM (rare earth metal): 0.01 to 0.20%, and the balance being Fe and impurities, and satisfying the formula N×P/REM≦0.10, wherein P, N and REM represent the contents (mass %) of P, N and REM, respectively. The pipe is hot worked using cross roll piercing, solution heat treated, and cold worked. The pipe is excellent in hot workability, stress corrosion cracking and does not laminate during cross piercing.

    摘要翻译: 一种高强度Cr-Ni合金无缝管的制造方法,其特征在于,以质量%计含有C:0.05%以下,Si:1.0%以下,Mn:小于3.0%的化合物组成的合金坯, ,P:0.005%以下,S:0.005%以下,Cu:0.01〜4.0%,Ni:25%以上且不足35%,Cr:20〜30%,Mo:0.01%以上且小于 4.0%,N:0.10〜0.30%,Al:0.03〜0.30%,O(氧):0.01%以下,REM(稀土金属):0.01〜0.20%,余量为Fe和杂质,满足 式N×P / REM≦̸ 0.10,其中P,N和REM分别表示P,N和REM的含量(质量%)。 管道采用横轧穿孔,溶液热处理和冷加工进行热加工。 该管材具有优异的热加工性,应力腐蚀开裂性,并且在交叉穿孔期间不层压。

    Martensitic stainless steel
    4.
    发明申请
    Martensitic stainless steel 有权
    马氏体不锈钢

    公开(公告)号:US20050274436A1

    公开(公告)日:2005-12-15

    申请号:US10411186

    申请日:2003-04-11

    摘要: A martensitic stainless steel having a C content of 0.01 to 0.1 mass %, a Cr content of 9 to 15 mass % and a N content of not more than 0.1 mass %, wherein the maximum length of the carbides in the steel is 10 to 200 nm in the direction of the minor axis, or wherein the ratio of the average Cr concentration [Cr] to the average Fe concentration [Fe] in carbides in the steel ([Cr]/[Fe]) is not more than 0.4, or wherein the content of M23C6 type carbides is not more than 1 volume %, the content of M3C type carbides is 0.01 to 1.5 volume % and the content of MN type or M2N type nitrides is not more than 0.3 volume % is provided. This stainless steel has a high toughness in spite of both a relatively more C content and a high strength, thereby providing a, wide applicability to pipe material for oil wells containing carbon dioxide and a small amount of hydrogen sulfide, in particular for oil wells having a much greater depth.

    摘要翻译: C含量为0.01〜0.1质量%,Cr含量为9〜15质量%,N含量为0.1质量%以下的马氏体系不锈钢,其中,碳的最大长度为10〜200 或其中钢中的碳化物中的平均Cr浓度[Cr]与平均Fe浓度[Fe]的比例([Cr] / [Fe]))不大于0.4,或者 其中M 23 C 6 C型碳化物的含量不超过1体积%,M 3 C型碳化物的含量为0.01〜 1.5体积%,并且MN型或M 2 N型氮化物的含量不大于0.3体积%。 该不锈钢虽然具有较高的C含量和较高的强度,但具有较高的韧性,从而为含有二氧化碳和少量硫化氢的油井的管道材料提供了广泛的应用,特别是对于具有 更深的深度

    Martensitic stainless steel and method for manufacturing same
    5.
    发明授权
    Martensitic stainless steel and method for manufacturing same 有权
    马氏体不锈钢及其制造方法

    公开(公告)号:US07662244B2

    公开(公告)日:2010-02-16

    申请号:US10443821

    申请日:2003-05-23

    IPC分类号: C22C38/18

    摘要: A martensitic stainless steel provided includes C: 0.01-0.1% and Cr: 9-15%, and the retained austenite phase has a thickness not more than 100 nm in such a manner that the X-ray integral intensities of 111γ and 110α satisfy the following formula (a): 0.005≦111γ/(111γ+110α)≦0.05  (a) Such a metal structure can be obtained by the following procedure: the steel is heated at a temperature of the Ac3 point or more, and then cooled from 800° C. to 400° C. at a cooling rate of not less than 0.08° C./sec and further cooled down to 150° C. at a cooling rate of not more than 1° C./sec. The martensitic stainless steel according to the present invention has a relatively high carbon content and a greater toughness in spite of a high mechanical strength, and further exhibits an excellent corrosion resistance, so that it is particularly effective as the material for constructing a deep oil well.

    摘要翻译: 提供的马氏体不锈钢包括C:0.01-0.1%和Cr:9-15%,并且残留奥氏体相的厚度不大于100nm,使得111gamma和110alpha的X射线积分强度满足 下式(a):0.005 <= 111gamma /(111gamma + 110alpha)这样的金属结构可以通过以下步骤获得:将钢在Ac 3点以上的温度下加热,然后从800℃冷却。 至400℃,冷却速度不低于0.08℃/秒,并以不超过1℃/秒的冷却速度进一步冷却至150℃。 本发明的马氏体系不锈钢虽然具有较高的机械强度,但具有较高的碳含量和较高的韧性,并且还具有优异的耐腐蚀性,因此作为构成深油井的材料特别有效 。

    Martensitic stainless steel
    6.
    发明授权
    Martensitic stainless steel 有权
    马氏体不锈钢

    公开(公告)号:US07361236B2

    公开(公告)日:2008-04-22

    申请号:US10411186

    申请日:2003-04-11

    摘要: A martensitic stainless steel having a C content of 0.01 to 0.1 mass %, a Cr content of 9 to 15 mass % and a N content of not more than 0.1 mass %, wherein the maximum length of the carbides in the steel is 10 to 200 nm in the direction of the minor axis, or wherein the ratio of the average Cr concentration [Cr] to the average Fe concentration [Fe] in carbides in the steel ([Cr]/[Fe]) is not more than 0.4, or wherein the content of M23C6 type carbides is not more than 1 volume %, the content of M3C type carbides is 0.01 to 1.5 volume % and the content of MN type or M2N type nitrides is not more than 0.3 volume % is provided. This stainless steel has a high toughness in spite of both a relatively more C content and a high strength, thereby providing a, wide applicability to pipe material for oil wells containing carbon dioxide and a small amount of hydrogen sulfide, in particular for oil wells having a much greater depth.

    摘要翻译: C含量为0.01〜0.1质量%,Cr含量为9〜15质量%,N含量为0.1质量%以下的马氏体系不锈钢,其中,碳的最大长度为10〜200 或其中钢中的碳化物中的平均Cr浓度[Cr]与平均Fe浓度[Fe]的比例([Cr] / [Fe]))不大于0.4,或者 其中M 23 C 6 C型碳化物的含量不超过1体积%,M 3 C型碳化物的含量为0.01〜 1.5体积%,并且MN型或M 2 N型氮化物的含量不大于0.3体积%。 该不锈钢虽然具有较高的C含量和较高的强度,但具有较高的韧性,从而为含有二氧化碳和少量硫化氢的油井的管道材料提供了广泛的应用,特别是对于具有 更深的深度

    Stainless steel for high-pressure hydrogen gas, and container and device made of same
    9.
    发明申请
    Stainless steel for high-pressure hydrogen gas, and container and device made of same 有权
    用于高压氢气的不锈钢,以及由其制成的容器和装置

    公开(公告)号:US20050178478A1

    公开(公告)日:2005-08-18

    申请号:US11108099

    申请日:2005-04-18

    摘要: A high-strength stainless steel, having good mechanical properties and corrosion resistance in a high-pressure hydrogen gas environment, and excellent in stress corrosion cracking resistance, and a container or other device for high-pressure hydrogen gas, which is made of the said stainless steel, are provided. The stainless steel is characterized in that it consists of, by mass %, C: not more than 0.02%, Si: not more than 1.0%, Mn: 3 to 30%, Cr: more than 22% but not more than 30%, Ni: 17 to 30%, V: 0.001 to 1.0%, N: 0.10 to 0.50% and Al: not more than 0.10%, and the balance Fe and impurities. Among the impurities, P is not more than 0.030%, S is not more than 0.005%, and Ti, Zr and Hf are not more than 0.01% respectively, and the contents of Cr, Mn and N satisfy the following relationship [1]: 5Cr+3.4Mn≦500N  [1]

    摘要翻译: 一种高强度不锈钢,在高压氢气环境下具有良好的机械性能和耐腐蚀性,耐应力腐蚀开裂性优异,以及用于高压氢气的容器或其他装置,由所述 不锈钢。 不锈钢的特征在于,以质量%计含有C:不大于0.02%的Si:不大于1.0%,Mn:3〜30%,Cr:大于22%但不大于30% ,Ni:17〜30%,V:0.001〜1.0%,N:0.10〜0.50%,Al:0.10%以下,余量为Fe和杂质。 在杂质中,P不大于0.030%,S不大于0.005%,Ti,Zr和Hf分别不大于0.01%,Cr,Mn和N的含量满足下列关系[1] :<?in-line-formula description =“In-line formula”end =“lead”?> 5Cr + 3.4Mn <= 500N [1] <?in-line-formula description =“In-line Formulas”end = “尾巴”?