High-strength stainless steel for oil well and high-strength stainless steel pipe for oil well
    1.
    发明授权
    High-strength stainless steel for oil well and high-strength stainless steel pipe for oil well 有权
    油井高强度不锈钢和油井高强度不锈钢管

    公开(公告)号:US09303296B2

    公开(公告)日:2016-04-05

    申请号:US13607957

    申请日:2012-09-10

    IPC分类号: C21D8/10 C22C38/42 C22C38/44

    摘要: A high-strength stainless steel for oil well having corrosion resistance excellent in a high-temperature environment, having excellent SSC resistance at normal temperature, and having better workability than 13% Cr steels has a chemical composition containing, by mass percent, C: at most 0.05%, Si: at most 1.0%, Mn: at most 0.3%, P: at most 0.05%, S: less than 0.002%, Cr: over 16% and at most 18%, Mo: 1.5 to 3.0%, Cu: 1.0 to 3.5%, Ni: 3.5 to 6.5%, Al: 0.001 to 0.1%, N: at most 0.025%, and O: at most 0.01%, the balance being Fe and impurities, a microstructure containing a martensite phase, 10 to 48.5%, by volume ratio, of a ferrite phase and at most 10%, by volume ratio, of a retained austenite phase, yield strength of at least 758 MPa and uniform elongation of at least 10%.

    摘要翻译: 在高温环境下耐腐蚀性优异,在常温下具有优异的耐SSC性,并且具有比13%Cr钢更好的加工性的油井用高强度不锈钢具有以质量%计含有C:at 最多0.05%,Si:1.0%以下,Mn:0.3%以下,P:0.05%以下,S:小于0.002%,Cr:16%以上18%以下,Mo:1.5〜3.0% Cu:1.0〜3.5%,Ni:3.5〜6.5%,Al:0.001〜0.1%,N:0.025%以下,O:0.01%以下,余量为Fe,杂质,含有马氏体相的组织, 10 -48.5%体积比的铁素体相和至少10%的残余奥氏体相的体积比,至少758MPa的屈服强度和至少10%的均匀伸长率。

    High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistance
    4.
    发明授权
    High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistance 有权
    高强度不锈钢管具有优异的耐硫化应力开裂性和高温碳酸气体耐腐蚀性能

    公开(公告)号:US08608872B2

    公开(公告)日:2013-12-17

    申请号:US13082432

    申请日:2011-04-08

    IPC分类号: C22C38/42 C22C38/44

    摘要: The problem to be solved is the provision of a high-strength stainless steel pipe having a sufficient corrosion resistance in a high-temperature carbonic acid gas environment and having an excellent sulfide stress cracking resistance at normal temperature. A high-strength stainless steel pipe consist of, by mass %, C: 0.05% or less, Si: 1.0% or less, P: 0.05% or less, S: less than 0.002%, Cr: more than 16% and 18% or less, Mo: more than 2% and 3% or less, Cu: 1% to 3.5%, Ni: 3% or more and less than 5%, Al: 0.001% to 0.1% and O: 0.01% or less, Mn: 1% or less and N: 0.05% or less, and Mn and N in the above ranges satisfy formula (1), and the balance being Fe and impurities; and the metal micro-structure of the stainless steel pipe mainly includes a martensitic phase and comprises 10 to 40% of a ferritic phase by volume fraction and 10% or less of a retained γ-phase by volume fraction. [Mn]×([N]−0.0045)≦0.001  (1) wherein the symbols of elements in formula (1) respectively represent the contents (unit: mass %) of the elements in the steel.

    摘要翻译: 要解决的问题是在高温碳酸气体环境中提供具有足够耐腐蚀性的高强度不锈钢管,并且在常温下具有优异的耐硫化物应力开裂性。 高强度不锈钢管以质量%计含有C:0.05%以下,Si:1.0%以下,P:0.05%以下,S:小于0.002%,Cr:16%以上18以下 %以下,Mo:大于2%,3%以下,Cu:1〜3.5%,Ni:3%以上且小于5%,Al:0.001〜0.1%,O:0.01%以下 ,Mn:1%以下,N:0.05%以下,上述范围的Mn和N满足式(1),余量为Fe和杂质; 并且不锈钢管的金属微结构主要包括马氏体相,并且包含10〜40体积%的铁素体相和10体积%以下的γ相。 [Mn]×([N] -0.0045)@ 0.001(1)其中,式(1)中的元素的符号分别表示钢中元素的含量(单位:质量%)。

    HIGH-STRENGTH STAINLESS STEEL PIPE EXCELLENT IN SULFIDE STRESS CRACKING RESISTANCE AND HIGH-TEMPERATURE CARBONIC-ACID GAS CORROSION RESISTANCE
    6.
    发明申请
    HIGH-STRENGTH STAINLESS STEEL PIPE EXCELLENT IN SULFIDE STRESS CRACKING RESISTANCE AND HIGH-TEMPERATURE CARBONIC-ACID GAS CORROSION RESISTANCE 有权
    高强度不锈钢管优良的耐硫酸盐耐应力和高温碳酸气体耐腐蚀性

    公开(公告)号:US20110226378A1

    公开(公告)日:2011-09-22

    申请号:US13082432

    申请日:2011-04-08

    IPC分类号: F16L9/00

    摘要: The problem to be solved is the provision of a high-strength stainless steel pipe having a sufficient corrosion resistance in a high-temperature carbonic acid gas environment and having an excellent sulfide stress cracking resistance at normal temperature.A high-strength stainless steel pipe consist of by mass %, C: 0.05% or less, Si: 1.0% or less, P: 0.05% or less, S: less than 0.002%, Cr: more than 16% and 18% or less, Mo: more than 2% and 3% or less, Cu: 1% to 3.5%, Ni: 3% or more and less than 5%, Al: 0.001% to 0.1% and O: 0.01% or less, Mn: 1% or less and N: 0.05% or less, and Mn and N in the above ranges satisfy formula (1), and the balance being Fe and impurities; and the metal micro-structure of the stainless steel pipe mainly includes a martensitic phase and comprises 10 to 40% of a ferritic phase by volume fraction and 10% or less of a retained γ-phase by volume fraction. [Mn]×([N]−0.0045)≦0.001  (1) wherein the symbols of elements in formula (1) respectively represent the contents (unit: mass %) of the elements in the steel.

    摘要翻译: 要解决的问题是在高温碳酸气体环境中提供具有足够耐腐蚀性的高强度不锈钢管,并且在常温下具有优异的耐硫化物应力开裂性。 高强度不锈钢管以质量%计,C:0.05%以下,Si:1.0%以下,P:0.05%以下,S:小于0.002%,Cr:16%以上18% 以下,Mo:大于2%和3%以下,Cu:1〜3.5%,Ni:3%以上且小于5%,Al:0.001〜0.1%,O:0.01%以下, Mn:1%以下,N:0.05%以下,上述范围的Mn和N满足式(1),余量为Fe和杂质; 并且不锈钢管的金属微结构主要包括马氏体相,并且含有10〜40体积%的铁素体系相和10体积%以下的γ相。 [Mn]×([N] -0.0045)≦̸ 0.001(1)其中,式(1)中的元素的符号分别表示钢中的元素的含量(单位:质量%)。

    Martensitic stainless steel for welded structures
    7.
    发明授权
    Martensitic stainless steel for welded structures 有权
    用于焊接结构的马氏体不锈钢

    公开(公告)号:US08163233B2

    公开(公告)日:2012-04-24

    申请号:US12379724

    申请日:2009-02-27

    IPC分类号: C22C38/44 C22C38/42

    摘要: A martensitic stainless steel for welded structures including by mass %, C: 0.001 to 0.05%, Si: 0.05 to 1%, Mn: 0.05 to 2%, P: 0.03% or less, REM: 0.0005 to 0.1%, Cr: 8 to 16%, Ni: 0.1 to 9% and sol. Al: 0.001 to 0.1%; and further including one or more elements selected from among Ti: 0.005 to 0.5%, Zr: 0.005 to 0.5%, Hf: 0.005 to 0.5%, V: 0.005 to 0.5% and Nb: 0.005 to 0.5%; and O: 0.005% or less, N: 0.1% or less, with the balance being Fe and impurities; and the P and REM content satisfies: P≦0.6×REM. This steel possesses excellent SCC (stress corrosion cracking) resistance in welded sections in Sweet environments.

    摘要翻译: 焊接结构的马氏体系不锈钢,以质量%计,C:0.001〜0.05%,Si:0.05〜1%,Mn:0.05〜2%,P:0.03%以下,REM:0.0005〜0.1%,Cr:8 至16%,Ni:0.1〜9%,溶胶。 Al:0.001〜0.1% 进一步包括选自Ti:0.005〜0.5%,Zr:0.005〜0.5%,Hf:0.005〜0.5%,V:0.005〜0.5%,Nb:0.005〜0.5%的一种或多种元素; O:0.005%以下,N:0.1%以下,余量为Fe和杂质; P和REM含量满足:P≦̸ 0.6×REM。 这种钢在甜蜜环境中的焊接部分具有优异的SCC(应力腐蚀开裂)性。

    DUPLEX STAINLESS STEEL
    9.
    发明申请
    DUPLEX STAINLESS STEEL 审中-公开
    双相不锈钢

    公开(公告)号:US20120177529A1

    公开(公告)日:2012-07-12

    申请号:US13411761

    申请日:2012-03-05

    IPC分类号: C22C38/58 C22C38/42 C22C38/44

    摘要: A duplex stainless steel excellent in the weldability during large heat input welding and in the stress corrosion cracking resistance in a chloride environment containing corrosive associated gases has a chemical composition consisting, by mass %, of C: 0.03% or less, Si: 0.2 to 1%, Mn: 5.0% or less, P: 0.040% or less, S: 0.010% or less, sol. Al: 0.040% or less, Ni: 4 to 8%, Cr: 20 to 28%, Mo: 0.5 to 2.0%, Cu: more than 2.0% and 4.0% or less and N: 0.1 to 0.35%, and optionally contains one or more selected from among V, Ca, Mg, B and a rare earth metal(s), with the balance being Fe and impurities; wherein the duplex stainless steel satisfies the following formulas: 2.2Cr+7Mo+3Cu>66   (1) Cr+11Mo+10Ni

    摘要翻译: 在含有腐蚀性相关气体的氯化物环境中,在大的热输入焊接时的焊接性和耐应力腐蚀开裂性优异的双相不锈钢具有质量%C:0.03%以下,Si:0.2〜 1%,Mn:5.0%以下,P:0.040%以下,S:0.010%以下。 Al:0.040%以下,Ni:4〜8%,Cr:20〜28%,Mo:0.5〜2.0%,Cu:大于2.0%,4.0%以下,N:0.1〜0.35% 选自V,Ca,Mg,B和稀土金属中的一种或多种,​​余量为Fe和杂质; 其中双相不锈钢满足下列公式:2.2Cr + 7Mo + 3Cu> 66(1)Cr + 11Mo + 10Ni <12(Cu + 30N)(2),其中符号表示钢中元素的质量%。

    DUPLEX STAINLESS STEEL
    10.
    发明申请
    DUPLEX STAINLESS STEEL 有权
    双相不锈钢

    公开(公告)号:US20140212322A1

    公开(公告)日:2014-07-31

    申请号:US14342039

    申请日:2012-08-28

    摘要: Provided is duplex stainless steel having high strength, SCC resistance and SSC resistance excellent in a high-temperature chloride environment, and capable of suppressing precipitation of a σ phase. The duplex stainless steel of the present embodiment includes, in mass %, of: C: at most 0.03%; Si: 0.2 to 1%; Mn: more than 5.0% to at most 10%; P: at most 0.040%; S: at most 0.010%; Ni: 4.5 to 8%; sol. Al: at most 0.040%; N: more than 0.2% to at most 0.4%; Cr: 24 to 29%; Mo: 0.5 to less than 1.5%; Cu: 1.5 to 3.5%; W: 0.05 to 0.2%; the balance being Fe and impurities, wherein the duplex stainless steel satisfies Formula (1): Cr+8Ni+Cu+Mo+W/2≧65 . . . (1), where a symbol of each element in Formula (1) represents a content of the element (in mass %).

    摘要翻译: 提供在高温氯化物环境中具有优异的高强度,耐SCC性和耐SSC性的双相不锈钢,并且能够抑制淀粉的沉淀。 相。 本实施方式的双相不锈钢以质量%计含有:C:0.03%以下, Si:0.2〜1% Mn:超过5.0%至至多10%; P:0.040%以下; S:0.010%以下; Ni:4.5〜8% 溶胶 Al:0.040%以下; N:0.2%以上0.4%以下; Cr:24〜29% Mo:0.5〜小于1.5% Cu:1.5〜3.5% W:0.05〜0.2% 余量为Fe和杂质,其中双相不锈钢满足式(1):Cr + 8Ni + Cu + Mo + W /2≥65。 。 。 (1)中,式(1)中的各元素的符号表示元素的含量(质量%)。