公开(公告)号：EP2415883A4

公开(公告)日：2017-06-07

申请号：EP10758614

申请日：2010-03-29

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： OTOME YOHEI ,  IGARASHI MASAAKI ,  OKADA HIROKAZU ,  KONDO KUNIO ,  SAGARA MASAYUKI ,  SHIMODA KAZUHIRO

IPC分类号： C21D8/10 ,  C21D6/00 ,  C22C1/00 ,  C22C38/00 ,  C22C38/58

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

摘要： A method for producing a high-strength Cr-Ni alloy seamless pipe, excellent in hot workability and stress corrosion cracking resistance, without causing the lamination during piercing-rolling, comprising: preparing an alloy billet that has a chemical composition comprising, 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 following formula (1); hot working to make a seamless material pipe on the basis of a cross roll piercing process; subjecting a solution treatment; and cold working. N × P / REM ‰¤ 0.10 wherein P, N and REM in formula (1) represent the contents (mass%) of P, N and REM, respectively. The Cr-Ni alloy may further contain one or more of W, Ti, Nb, Zr, V, Ca and Mg.

摘要翻译： 本发明提供一种热轧加工性和耐应力腐蚀开裂性优异且不发生穿孔轧制时的层压的高强度Cr-Ni合金无缝管的制造方法，其包括：准备以质量％计含有化学组成的合金坯料， ，C：0.05％以下，Si：1.0％以下，Mn：不到3.0％，P：0.005％以下，S：0.005％以下，Cu：0.01〜4.0％，Ni：25％以上 以下，Cr：20〜30％，Mo：0.01％以上且不足4.0％，N：0.10〜0.30％，Al：0.03〜0.30％，O（氧）：0.01％以下，REM （稀土类金属）：0.01〜0.20％，余量由Fe和杂质构成，满足下式（1）。 热轧工艺，以交叉辊穿孔工艺为基础制造无缝材料管; 进行溶液处理; 和冷的工作。 N×P /REM≤0.10式（1）中的P，N和REM分别表示P，N和REM的含量（质量％）。 Cr-Ni合金还可以含有W，Ti，Nb，Zr，V，Ca和Mg中的一种或多种。

公开(公告)号：EP2434030A4

公开(公告)日：2014-04-30

申请号：EP10777731

申请日：2010-05-17

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： TAKABE HIDEKI ,  KONDO KUNIO ,  AMAYA HISASHI ,  OHE TARO ,  OTOME YOHEI

IPC分类号： C22C38/44 ,  C21D8/02 ,  C21D8/10 ,  C21D9/08 ,  C22C38/50

CPC分类号： C22C38/50 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/0205 ,  C21D8/105 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  F16L9/02

公开(公告)号：EP2194152A4

公开(公告)日：2017-08-30

申请号：EP08835001

申请日：2008-10-01

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： OTOME YOHEI ,  IGARASHI MASAAKI ,  AMAYA HISASHI ,  OKADA HIROKAZU

IPC分类号： C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58

CPC分类号： C22C38/02 ,  C22C38/001 ,  C22C38/005 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  Y10S148/909

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 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： 本发明提供一种热加工性和耐应力腐蚀开裂性优异的高强度Cr-Ni合金材料和油井用无缝管。 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％或 S：0.005％以下，Cu：0.01〜4％，Ni：25％以上且低于35％，Cr：20〜30％，Mo：0.01％以上且低于4.0％，N：0.10 至0.30％，Al：0.03至0.30％，O（氧）：0.01％或更少，REM（稀土金属）：0.01至0.20％，余量为Fe和杂质，并且还满足以下条件 公式1）。 式（1）中的P，N和REM分别表示P，N和REM的含量（质量％），N×P /REM≤0.40。 高强度Cr-Ni合金材料可以进一步含有W，Ti，Nb，Zr，V，Ca和Mg中的一种或多种来代替Fe的一部分。

公开(公告)号：EP2565287A4

公开(公告)日：2017-03-15

申请号：EP11774956

申请日：2011-04-25

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： OHE TARO ,  AMAYA HISASHI ,  TAKABE HIDEKI ,  KONDO KUNIO ,  OTOME YOHEI

IPC分类号： C22C38/42 ,  C21D8/10 ,  C21D9/08 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

CPC分类号： C21D8/10 ,  C21D8/105 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  Y10T428/12292

摘要： There is provided 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. The high-strength stainless steel for oil well according to the present invention 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%.

公开(公告)号：EP2832881A4

公开(公告)日：2016-03-09

申请号：EP13768493

申请日：2013-02-27

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： NAKATSUKA SHINJIRO ,  OHE TARO ,  AMAYA HISASHI ,  TAKABE HIDEKI ,  OTOME YOHEI ,  TOMIO YUSAKU ,  SEO MASANAO ,  OMURA TOMOHIKO ,  KONDO KUNIO

IPC分类号： C22C38/00 ,  C21D6/00 ,  C21D9/08 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  E21B17/00

CPC分类号： C22C38/001 ,  C21D6/002 ,  C21D6/004 ,  C21D9/08 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  E21B17/00

摘要： A stainless steel for oil wells which has excellent high-temperature corrosion resistance and can stably obtain a strength of not less than 758 MPa is provided. The stainless steel for oil wells contains, by mass%, C: not more than 0.05%, Si: not more than 1.0%, Mn: 0.01 to 1.0%, P: not more than 0.05%, S: less than 0.002%, Cr: 16 to 18%, Mo: 1.8 to 3%, Cu: 1.0 to 3.5%, Ni: 3.0 to 5.5%, Co: 0.01 to 1.0%, Al: 0.001 to 0.1%, O: not more than 0.05%, and N: not more than 0.05%, the balance being Fe and impurities, and satisfies Formulas (1) and (2): Cr + 4 �¢ Ni + 3 �¢ Mo + 2 �¢ Cu ‰¥ 44 Cr + 3 �¢ Ni + 4 �¢ Mo + 2 �¢ Cu / 3 ‰¤ 46 where each symbol of element in Formulas (1) and (2) is substituted by the content (mass%) of a corresponding element.

摘要翻译： 提供了具有优异的高温耐腐蚀性并且可以稳定地获得不小于758MPa的强度的油井用不锈钢。 油井用不锈钢以质量％计含有C：0.05％以下，Si：1.0％以下，Mn：0.01〜1.0％，P：0.05％以下S：小于0.002％ Cr：16〜18％，Mo：1.8〜3％，Cu：1.0〜3.5％，Ni：3.0〜5.5％，Co：0.01〜1.0％，Al：0.001〜0.1％，O：0.05％ 和N：不大于0.05％，余量为Fe和杂质，满足公式（1）和（2）：Cr + 4 ¢Ni + 3 ¢Mo + 2 ¢Cu‰¥44 Cr + 3 ¢Ni + 4 ¢Mo + 2 ¢Cu / 3‰¤46其中式（1）和（2）中元素的每个符号被相应元素的含量（质量％）代替。