公开(公告)号：US07648587B2

公开(公告)日：2010-01-19

申请号：US10588122

申请日：2004-06-17

申请人： Takahiro Kushida ,  Kazuyo Kushida, legal representative ,  Tomohiko Omura ,  Mitsuhiro Numata

发明人： Takahiro Kushida ,  Tomohiko Omura ,  Mitsuhiro Numata

IPC分类号： C22C38/00

CPC分类号： C22C38/02 ,  C22C38/04

摘要： A steel product for a line pipe according to the invention has a composition containing, in mass %, C : 0.03% to 0.15%, Si: 0.05% to 1.0%, Mn: 0.5% to 1.8%, P: 0.015% or less, S: 0.004% or less, O: 0.01% or less, N: 0.007% or less, sol. Al: 0.01% to 0.1%, Ti: 0.024% or less, Ca: 0.0003% to 0.02%, and the balance consisting of Fe and impurities. The size of TiN in the steel product for a line pipe is at most 30 μm. The steel product has high HIC resistance and its crack area ratio can be reduced to 3% or less.

摘要翻译： 根据本发明的管线用钢产品具有质量％C：0.03〜0.15％，Si：0.05〜1.0％，Mn：0.5〜1.8％，P：0.015％以下的组合物 ，S：0.004％以下，O：0.01％以下，N：0.007％以下，溶胶。 Al：0.01〜0.1％，Ti：0.024％以下，Ca：0.0003〜0.02％，余量由Fe和杂质构成。 用于管道管道的钢制品中的TiN的尺寸至多为30μm。 该钢产品具有高HIC电阻，裂纹面积比可以降低到3％以下。

公开(公告)号：US20070217942A1

公开(公告)日：2007-09-20

申请号：US10588122

申请日：2004-06-17

申请人： Takahiro Kushida ,  Kazuyo Kushida ,  Tomohiko Omura ,  Mitsuhiro Numata

发明人： Takahiro Kushida ,  Kazuyo Kushida ,  Tomohiko Omura ,  Mitsuhiro Numata

IPC分类号： C22C38/00

CPC分类号： C22C38/02 ,  C22C38/04

摘要： A steel product for a line pipe according to the invention has a composition containing, in mass %, C : 0.03% to 0.15%, Si: 0.05% to 1.0%, Mn: 0.5% to 1.8%, P: 0.015% or less, S: 0.004% or less, O: 0.01% or less, N: 0.007% or less, sol. Al: 0.01% to 0.1%, Ti: 0.024% or less, Ca: 0.0003% to 0.02%, and the balance consisting of Fe and impurities. The size of TiN in the steel product for a line pipe is at most 30 μm. The steel product has high HIC resistance and its crack area ratio can be reduced to 3% or less.

摘要翻译： 根据本发明的管线用钢产品具有质量％C：0.03〜0.15％，Si：0.05〜1.0％，Mn：0.5〜1.8％，P：0.015％以下的组合物 ，S：0.004％以下，O：0.01％以下，N：0.007％以下，溶胶。 Al：0.01〜0.1％，Ti：0.024％以下，Ca：0.0003〜0.02％，余量由Fe和杂质组成。 用于管道管道的钢制品中的TiN的尺寸至多为30μm。 该钢产品具有高HIC电阻，裂纹面积比可以降低到3％以下。

公开(公告)号：US08157930B2

公开(公告)日：2012-04-17

申请号：US10798855

申请日：2004-03-12

申请人： Hisashi Amaya ,  Kunio Kondo ,  Masakatsu Ueda ,  Keiichi Nakamura ,  Takahiro Kushida ,  Kazuyo Kushida, legal representative

发明人： Hisashi Amaya ,  Kunio Kondo ,  Masakatsu Ueda ,  Keiichi Nakamura ,  Takahiro Kushida

IPC分类号： C22C38/22 ,  C21D8/02

CPC分类号： C22C38/44 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/42

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％＆lt; NlE; Mo + Cu / 4＆nlE; 5％（a）0.55％＆nlE; 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。

公开(公告)号：US20050034790A1

公开(公告)日：2005-02-17

申请号：US10798855

申请日：2004-03-12

申请人： Hisashi Amaya ,  Kunio Kondo ,  Masakatsu Ueda ,  Keiichi Nakamura ,  Takahiro Kushida ,  Kazuyo Kushida

发明人： Hisashi Amaya ,  Kunio Kondo ,  Masakatsu Ueda ,  Keiichi Nakamura ,  Takahiro Kushida ,  Kazuyo Kushida

IPC分类号： C22C38/00 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/22

CPC分类号： C22C38/44 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/42

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 和杂质，其中Cu和Mo的含量满足下式（a）或（b），0.2％<= Mo + Cu / 4 <= 5％（a）0.55％<= Mo + Cu / 4 <= 5％（b），其中HRC中的硬度为30-45，并且原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。

公开(公告)号：US06267828B1

公开(公告)日：2001-07-31

申请号：US09456917

申请日：1999-12-07

申请人： Takahiro Kushida ,  Kaori Miyata ,  Kunio Kondo ,  Tomohiko Omura

发明人： Takahiro Kushida ,  Kaori Miyata ,  Kunio Kondo ,  Tomohiko Omura

IPC分类号： C22C3822

CPC分类号： C21D6/02 ,  C21D1/18 ,  C22C38/22 ,  C22C38/24

摘要： A low alloy steel for oil country tubular well which has a yield stress of 110 ksi or above, and excellent sulfide stress cracking resistance. The low alloy steel comprises, by weight, 0.2 to 0.35% carbon, 0.2 to 0.7% chromium, 0.1 to 0.5% molybdenum, 0.1 to 0.3% vanadium, 0 to 0.5% silicon, 0 to 1% manganese, 0 to 0.1% aluminum, 0 to 0.1% niobium, 0 to 0.05% titanium, 0 to 0.005% boron, 0 to 0.1% zirconium, 0 to 1% tungsten, 0 to 0.01% calcium, 0.025% or less phosphorus, 0.01% or less sulfur, 0.01% or less nitrogen, and 0.01% or less oxygen. The low alloy steel further comprises a total amount of precipitated carbides between about 2 to 5% by weight, and a ratio of the MC type carbide to the total amount of the precipitated carbides is between about 8 to 40% by weight.

摘要翻译： 用于油井管的低合金钢，其屈服应力为110ksi以上，并且具有优异的耐硫化物应力开裂性。 低合金钢的重量为0.2〜0.35％的碳，0.2〜0.7％的铬，0.1〜0.5％的钼，0.1〜0.3％的钒，0〜0.5％的硅，0〜1％的锰，0〜0.1％的铝 ，0〜0.1％的铌，0〜0.05％的钛，0〜0.005％的硼，0〜0.1％的锆，0〜1％的钨，0〜0.01％的钙，0.025％以下的磷，0.01％以下的硫，0.01 ％以下的氮，0.01％以下的氧。 低合金钢还含有约2〜5重量％的沉淀碳化物的总量，MC型碳化物与沉淀碳化物总量的比例为约8〜40重量％。

公开(公告)号：US06379821B2

公开(公告)日：2002-04-30

申请号：US09822233

申请日：2001-04-02

申请人： Takahiro Kushida ,  Tomohiko Omura ,  Kunio Kondo ,  Kazuhiro Ogawa ,  Masahiko Hamada

发明人： Takahiro Kushida ,  Tomohiko Omura ,  Kunio Kondo ,  Kazuhiro Ogawa ,  Masahiko Hamada

IPC分类号： B32B1518

CPC分类号： B23K9/23 ,  B23K9/0253 ,  B23K35/308 ,  B23K35/3086 ,  B23K2101/06 ,  C22C38/002 ,  C22C38/004 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  Y10S148/909 ,  Y10T428/12958 ,  Y10T428/12979 ,  Y10T428/12986

摘要： This invention relates to a large-diameter, thick-wall martensitic stainless steel welded pipe. For this welded pipe, the size of the raised weld bead portion on the inside surface is restricted to be small based on a conditional formula derived by considering the bead width and height and the yield strength of the base metal and of the weld metal. As a result, the base metal portion and pipe inside surface seam portion of this welded pipe are superior in corrosion resistance, in particular stress corrosion cracking resistance (SCC resistance). The sulfide stress corrosion resistance (sour gas resistance) and carbon dioxide corrosion resistance can be further improved by selecting the chemical compositions. This welded pipe is very well suited for use as a pipe for a pipeline for conveying a crude oil and a natural gas with no dehydration treatment, which is highly corrosive to metals.

摘要翻译： 本发明涉及一种大直径，厚壁的马氏体不锈钢焊管。 对于该焊接管，基于通过考虑焊道宽度和高度以及基体金属和焊接金属的屈服强度导出的条件公式将内表面上的凸起焊道部分的尺寸限制为小。 结果，该焊接管的贱金属部分和管内表面接缝部分具有优异的耐腐蚀性，特别是耐应力腐蚀开裂性（SCC电阻）。 通过选择化学成分可以进一步提高耐硫化物应力腐蚀性（耐酸性气体阻力）和二氧化碳耐腐蚀性。 该焊接管非常适用于输送原油和无脱水处理的天然气管道的管道，该管道对金属具有高度的腐蚀性。

公开(公告)号：US06220306B1

公开(公告)日：2001-04-24

申请号：US09447269

申请日：1999-11-23

申请人： Tomohiko Omura ,  Takahiro Kushida

发明人： Tomohiko Omura ,  Takahiro Kushida

IPC分类号： F16L900

CPC分类号： C22C38/50 ,  C21D6/004 ,  C21D8/0205 ,  C22C38/42 ,  C22C38/58

摘要： A hot rolled martensite stainless steel plate which is excellent in formability and corrosion resistance has a chemical composition comprising, by mass %, 0.05% or less carbon, 10 to 15% chromium, 0 to 3% molybdenum, 0 to 0.75% titanium, and 1 to 8% nickel, with the balance being iron and impurities, and has a yield stress of 110 ksi (758 MPa) or less and a specific amount of austenitic phase according to the plate thickness.

摘要翻译： 成型性和耐腐蚀性优异的热轧马氏体不锈钢板具有质量％为0.05％以下的碳，10〜15％的铬，0〜3％的钼，0〜0.75％的钛，以及 1〜8％的镍，余量为铁和杂质，并且屈服应力为110ksi（758MPa）或更低，并且根据板厚度的特定量的奥氏体相。

公开(公告)号：US20050274436A1

公开(公告)日：2005-12-15

申请号：US10411186

申请日：2003-04-11

申请人： Kunio Kondo ,  Takahiro Kushida ,  Yuichi Komizo ,  Masaaki Igarashi

发明人： Kunio Kondo ,  Takahiro Kushida ,  Yuichi Komizo ,  Masaaki Igarashi

IPC分类号： C21D8/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/54

CPC分类号： C22C38/44 ,  C21D8/005 ,  C21D8/0263 ,  C21D2211/008 ,  C22C38/42 ,  C22C38/46

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

公开(公告)号：US5383983A

公开(公告)日：1995-01-24

申请号：US45596

申请日：1993-04-09

申请人： Kunio Kondo ,  Takahiro Kushida ,  Masakatsu Ueda

发明人： Kunio Kondo ,  Takahiro Kushida ,  Masakatsu Ueda

IPC分类号： C22C38/00 ,  C22C38/44 ,  C22C38/50

CPC分类号： C22C38/44

摘要： A martensitic stainless steel for use in oil wells has improved stability in strength and good resistance to sulfide stress corrosion cracking The steel has a chemical composition consisting essentially, on a weight basis, of: Si: not greater than 1.0%, Mn: not greater than 1.0%, Cr: 10.0-14.0%, Mo: 0.5-7.0%, Ni: 4.0-8.0%, Al: 0.001-0.1%, either Ti in an amount satisfying the following inequality (1) or Zr in an amount satisfying the following inequality (2), optionally one or both of Mg: 0.001-0.05% and Ce: 0.001-0.05%, and a balance of Fe and incidental impurities in which the contents of C, P, S, N, and V as impurities are limited to 0.05% or less, 0.04% or less, 0.005% or less, 0.05% or less, and 0.2% or less, respectively, the composition further satisfying the following inequalities (3) and (4):4(%C).ltoreq.%Ti.ltoreq.{-0.01/(%C+0.015))}+0.75 (1)10(%C).ltoreq.%Zr.ltoreq.2 0% (2)30(%Cr)+36(%Mo)+14(%Si)-28(%Ni).ltoreq.455 (3)21(%Cr)+25(%Mo)+17(%Si)+35(%Ni).ltoreq.731 (4).

摘要翻译： 用于油井的马氏体不锈钢具有提高的强度稳定性和良好的耐硫化应力腐蚀开裂性。钢的化学组成基本上以重量计：Si：不大于1.0％，Mn：不大 1.0％，Cr：10.0〜14.0％，Mo：0.5〜7.0％，Ni：4.0〜8.0％，Al：0.001-0.1％，满足以下不等式（1）的Ti或满足 以下不等式（2），Mg：0.001-0.05％和Ce：0.001-0.05％中的任意一种或两种，以及C，P，S，N和V的含量的Fe和杂质的余量为 杂质分别限制在0.05％以下，0.04％以下，0.005％以下，0.05％以下，0.2％以下，进一步满足以下不等式（3）和（4）：4（％ C）

公开(公告)号：US5555916A

公开(公告)日：1996-09-17

申请号：US207729

申请日：1994-03-09

申请人： Takahiro Kushida

发明人： Takahiro Kushida

IPC分类号： C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  F16L9/02 ,  F16L11/00 ,  F16L55/00

CPC分类号： C22C38/06 ,  C22C38/60

摘要： A steel product, such as a steel pipe for line-pipe, excellent in sulfide cracking resistance sufficient to accept a CAPCIS test. The steel product is manufactured by rolling or forging to have a matrix not including B type inclusions having lengths of 200 .mu.m or more in the longitudinal direction.Furthermore, the steel pipe is manufactured by rolling or forging to have a matrix not including B type inclusions having dimensions of 200 .mu.m or more in the longitudinal direction within 4 mm of the inner surface.

摘要翻译： 一种钢管产品，如管道管钢管，硫化物开裂性好，足以接受CAPCIS试验。 钢产品通过轧制或锻造制造成具有不包括长度方向的长度为200μm以上的B型夹杂物的基体。 此外，钢管通过轧制或锻造而制造成具有在内表面的4mm以内的长度方向的尺寸为200μm以上的B型夹杂物的基体。