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 Cr-Ni alloy material and seamless pipe for oil well
    4.
    发明授权
    High strength Cr-Ni alloy material and seamless pipe for oil well 有权
    高强度Cr-Ni合金材料和油井无缝管

    公开(公告)号:US08071020B2

    公开(公告)日:2011-12-06

    申请号:US12485270

    申请日:2009-06-16

    IPC分类号: C22C28/00 C22C38/42 C22C38/44

    摘要: A high strength Cr—Ni alloy material excellent in hot workability and stress corrosion cracking resistance, and seamless pipe for oil well application which consists of, by mass percent, C: 0.05% or less, Si: 0.05 to 1.0%, Mn: 0.01% or more and less than 3.0%, P: 0.05% or less, S: 0.005% or less, Cu: 0.01 to 4%, 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, and REM (rare earth metal): 0.01 to 0.20% with the balance being Fe and impurities, and also satisfies the conditions in the following formula (1). N×P/REM≦0.40  formula (1) where P, N, and REM in the formula (1) respectively denote the contents (mass %) of P, N, and REM. The high strength Cr—Ni alloy material may further contain one or more types of W, Ti, Nb, Zr, V, Ca, and Mg, instead of part of Fe.

    摘要翻译: C:0.05%以下,Si:0.05〜1.0%,Mn:0.01%以下的质量%以上的油井用无缝管,耐热加工性和耐应力腐蚀开裂性优异的高强度Cr-Ni合金材料 %以上且小于3.0%,P:0.05%以下,S:0.005%以下,Cu:0.01〜4%,Ni:25%以上且小于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% 为Fe和杂质,也满足下式(1)的条件。 式(1)中的P,N,REM分别表示P,N,REM的含量(质量%),N×P / REM&nlE 0.40。 高强度Cr-Ni合金材料可以进一步含有一种或多种W,Ti,Nb,Zr,V,Ca和Mg而不是Fe的一部分。

    HIGH STRENGTH Cr-Ni ALLOY MATERIAL AND SEAMLESS PIPE FOR OIL WELL
    5.
    发明申请
    HIGH STRENGTH Cr-Ni ALLOY MATERIAL AND SEAMLESS PIPE FOR OIL WELL 有权
    高强度Cr-Ni合金材料和无缝管油

    公开(公告)号:US20090291017A1

    公开(公告)日:2009-11-26

    申请号:US12485270

    申请日:2009-06-16

    IPC分类号: C22C30/02

    摘要: [Object] To provide a high strength Cr—Ni alloy material excellent in hot workability and stress corrosion cracking resistance, and seamless pipe for oil well.[Solution] A high strength Cr—Ni alloy material which consists of, by mass percent, C: 0.05% or less, Si: 0.05 to 1.0%, Mn: 0.01% or more and less than 3.0%, P: 0.05% or less, S: 0.005% or less, Cu: 0.01 to 4%, 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, and REM (rare earth metal): 0.01 to 0.20%, with the balance being Fe and impurities, and also satisfies the conditions in the following formula (1). N×P/REM≦0.40  formula (1) where P, N, and REM in the formula (1) respectively denote the contents (mass %) of P, N, and REM. The high strength Cr—Ni alloy material may further contain one or more types of W, Ti, Nb, Zr, V, Ca, and Mg, instead of part of Fe.

    摘要翻译: 本发明提供热加工性和耐应力腐蚀开裂性优异的高强度Cr-Ni合金材料,以及油井无缝管。 [方案]一种高强度Cr-Ni合金材料,以质量%计含有C:0.05%以下,Si:0.05〜1.0%,Mn:0.01%以上且小于3.0%,P:0.05%以上 较少,S:0.005%以下,Cu:0.01〜4%,Ni:25%以上且小于35%,Cr:20〜30%,Mo:0.01%以上且4.0%以下N:0.10 至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,也满足以下条件 公式1)。 NxP / REM其中,式(1)中的P,N和REM分别表示P,N和REM的含量(质量%)。 高强度Cr-Ni合金材料可以进一步含有一种或多种W,Ti,Nb,Zr,V,Ca和Mg而不是Fe的一部分。