High-strength stainless steel for oil well and high-strength stainless steel pipe for oil well
    3.
    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%)。

    Oil country tubular good for expansion in well and duplex stainless steel used for oil country tubular good for expansion
    6.
    发明申请
    Oil country tubular good for expansion in well and duplex stainless steel used for oil country tubular good for expansion 审中-公开
    油井管用于油井和双相不锈钢膨胀,用于油井管用于膨胀

    公开(公告)号:US20090032246A1

    公开(公告)日:2009-02-05

    申请号:US12285032

    申请日:2008-09-29

    摘要: An oil country tubular good for expansion according to the invention is expanded in a well. The oil country tubular good for expansion according to the invention is formed of duplex stainless steel having a composition containing, in percentage by mass, 0.005% to 0.03% C, 0.1% to 1.0% Si, 0.2% to 2.0% Mn, at most 0.04% P, at most 0.015% S, 18.0% to 27.0% Cr, 4.0% to 9.0% Ni, at most 0.040% Al, and 0.05% to 0.40% N, and the balance consisting of Fe and impurities, a structure including an austenite ratio in the range from 40% to 90%. The oil country tubular good for expansion according to the invention has a yield strength from 256 MPa to 655 MPa, and a uniform elongation more than 20%. Therefore, the oil country tubular good for expansion according to the invention has a high pipe expansion characteristic.

    摘要翻译: 根据本发明的有利于膨胀的油井管在井中扩大。 根据本发明的用于膨胀的油井管由具有下列成分的双相不锈钢制成,该组合物含有以质量计含有0.005%至0.03%的C,0.1%至1.0%的Si,至多0.2%至2.0%的Mn 0.04%P,最多0.015%S,18.0%至27.0%Cr,4.0%至9.0%Ni,至多0.040%Al和0.05%至0.40%N,余量由Fe和杂质组成,包括 奥氏体比在40%至90%的范围内。 根据本发明的用于膨胀的油井管的屈服强度为256MPa至655MPa,均匀伸长率大于20%。 因此,根据本发明的用于膨胀的油井管具有较高的管膨胀特性。

    METHOD FOR PRODUCING HIGH-STRENGTH Cr-Ni ALLOY SEAMLESS PIPE
    7.
    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
    8.
    发明授权
    Martensitic stainless steel 有权
    马氏体不锈钢

    公开(公告)号:US08157930B2

    公开(公告)日:2012-04-17

    申请号:US10798855

    申请日:2004-03-12

    IPC分类号: C22C38/22 C21D8/02

    摘要: A martensitic stainless steel comprising C: 0.01-0.10%, Si: 0.05-1.0%, Mn: 0.05-1.5%, P: not more than 0.03%, S: not more than 0.01%, Cr: 9-15%, Ni: 0.1-4.5%, Al: not more than 0.05% and N: not more than 0.1% in mass %, and further comprising at least one of Cu: 0.05-5% and Mo: 0.05-5%, the residual being Fe and impurities, is provided, wherein the contents of Cu and Mo satisfy the following formula (a) or (b), 0.2%≦Mo+Cu/4≦5%  (a) 0.55%≦Mo+Cu/4≦5%  (b) and wherein the hardness is 30-45 in HRC and the carbide amount in grain boundaries of the prior austenite is not more than 0.5 volume %. The marensitic stainless steel has excellent properties regarding the sulfide stress cracking resistance, the resistance to corrosive wear and the localized corrosion.

    摘要翻译: 一种马氏体不锈钢,其包含C:0.01〜0.10%,Si:0.05〜1.0%,Mn:0.05〜1.5%,P:0.03%以下,S:0.01%以下,Cr:9〜15%,Ni :0.1-4.5%,Al:0.05%以下,N:0.1质量%以下,进一步含有Cu:0.05〜5%和Mo:0.05〜5%中的至少一种,残留物为Fe 提供Cu和Mo的含量满足下式(a)或(b):0.2%< NlE; Mo + Cu / 4≦̸ 5%(a)0.55%≦̸ Mo + Cu / 4& 5%(b),硬度在HRC中为30-45,前奥氏体的晶界中的碳化物量不大于0.5体积%。 锰矿不锈钢具有耐硫化物应力开裂性,耐腐蚀性和局部腐蚀性等优异性能。

    Martensitic stainless steel
    9.
    发明申请
    Martensitic stainless steel 有权
    马氏体不锈钢

    公开(公告)号:US20060174979A1

    公开(公告)日:2006-08-10

    申请号:US11335676

    申请日:2006-01-20

    IPC分类号: C22C38/22

    摘要: A martensitic stainless steel having a resistance to sulfide stress corrosion cracking superior to Super 13 Cr steel and having a strength and corrosion resistance comparable to dual phase stainless steels has a chemical composition consisting essentially of, in mass %, C: 0.001-0.1%, Si: 0.05-1.0%, Mn: 0.05-2.0%, P: at most 0.025%, S: at most 0.010%, Cr: 11-18%, Ni: 1.5-10%, sol. Al: 0.001-0.1%, N: at most 0.1%, O: at most 0.01%, Cu: 0-5%, solid solution Mo: 3.5-7%, the composition satisfying the following Equation (1), optionally at least one element selected from at least one of the following Groups A-C, and a remainder of Fe and impurities and undissolved Mo, if undissolved Mo is present. Ni-bal.=30(C+N)+0.5(Mn+Cu)+Ni+8.2−1.1(Cr+Mo+1.5Si)≧−4.5  Equation (1) Group A—W: 0.2-5% Group B—V: 0.001-0.50%, Nb: 0.001-0.50%, Ti: 0.001-0.50%, and Zr: 0.001-0.50% Group C—Ca: 0.0005-0.05%, Mg: 0.0005-0.05%, REM: 0.0005-0.05%, and B: 0.0001-0.01%

    摘要翻译: 具有优于超级13Cr钢的具有耐硫化应力腐蚀开裂性且具有与双相不锈钢相当的强度和耐腐蚀性的马氏体不锈钢的化学成分基本上以质量%计含有C:0.001-0.1% Si:0.05〜1.0%,Mn:0.05〜2.0%,P:0.025%以下,S:0.010%以下,Cr:11〜18%,Ni:1.5〜10% Al:0.001-0.1%,N:0.1%以下,O:0.01%以下,Cu:0-5%,固溶Mo:3.5〜7%,满足下述式(1)的组成, 选自以下组AC中的至少一个的元素,以及余量的Fe和杂质以及未溶解的Mo,如果不溶解的Mo存在。 Ni-bal = 30(C + N)+0.5(Mn + Cu)+ Ni + 8.2-1.1(Cr + Mo),在线式公式描述=“In-line formula”end =“lead” 组合AW:0.2-5%组BV:0.001-0.50%,Nb(0.51Si))= - 4.5方程式(1)<?in-line-formula description =“In-line Formulas”end =“tail” :0.001-0.50%,Ti:0.001-0.50%,Zr:0.001-0.50%C-Ca:0.0005-0.05%,Mg:0.0005-0.05%,REM:0.0005-0.05%,B:0.0001-0.01 %

    Martensitic stainless steel oil country tubular good
    10.
    发明授权
    Martensitic stainless steel oil country tubular good 有权
    马氏体不锈钢油管状管状好

    公开(公告)号:US09090957B2

    公开(公告)日:2015-07-28

    申请号:US11792524

    申请日:2004-12-07

    摘要: A martensitic stainless steel oil country tubular good contains, by mass, 0.005% to 0.1% C, 0.05% to 1% Si, 1.5% to 5% Mn, at most 0.05% P, at most 0.01% S, 9% to 13% Cr, at most 0.5% Ni, at most 2% Mo, at most 2% Cu, 0.001% to 0.1% Al, and 0.001% to 0.1% N, with the balance being Fe and impurities, and the pipe has a Cr-depleted region under the surface. The martensitic stainless steel oil country tubular good according to the present invention does not have a passive film on the surface and corrodes wholly at low speed. In addition, the Ni content is reduced, which allows uneven corrosion to be prevented. Therefore, SCC can be prevented from being generated in spite of the presence of a Cr-depleted region.

    摘要翻译: 马氏体不锈钢油管状良好的质量含有0.005〜0.1%的C,0.05〜1%的Si,1.5〜5%的Mn,至多0.05%的P,最多0.01%的S,9〜13 %Cr,最多0.5%Ni,至多2%Mo,最多2%Cu,0.001%至0.1%Al和0.001%至0.1%N,余量为Fe和杂质,管道为Cr - 表面下方的剥离区域。 根据本发明的马氏体不锈钢油管状管状体在表面上不具有钝化膜并且完全以低速腐蚀。 另外,Ni含量降低,能够防止不均匀的腐蚀。 因此,尽管存在Cr-贫化区域,也可以防止产生SCC。