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1. 发明申请

US20130084205A1 STEEL FOR STEEL TUBE WITH EXCELLENT SULFIDE STRESS CRACKING RESISTANCE 有权
标题翻译：具有优异的耐硫裂纹耐腐蚀性的钢管钢
公开(公告)号：US20130084205A1
公开(公告)日：2013-04-04
申请号：US13702763
申请日：2011-05-25
申请人： Mitsuhiro Numata , Tomohiko Omura , Masayuki Morimoto , Toru Takayama , Atsushi Soma
发明人： Mitsuhiro Numata , Tomohiko Omura , Masayuki Morimoto , Toru Takayama , Atsushi Soma
IPC分类号： C22C38/32 , C22C38/28 , C22C38/24 , C22C38/26 , C22C38/02 , C22C38/22
CPC分类号： C22C38/32 , C21D8/0247 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28
摘要： The present invention provides a steel which simultaneously satisfies a plurality of characteristics, specifically, a steel for tubes with excellent sulfide stress cracking resistance, including, C: 0.2 to 0.7%; Si: 0.01 to 0.8%; Mn: 0.1 to 1.5%; S: not more than 0.005%; P: not more than 0.03%; Al: 0.0005 to 0.1%; Ti: 0.005 to 0.05%; Ca: 0.0004 to 0.005%; N: not more than 0.007%; Cr: 0. 1 to 1.5%; and Mo: 0.2 to 1.0%; the balance being Fe, Mg and impurities, being characterized in that: the content of Mg is not less than 1.0 ppm and not more than 5.0 ppm; and inclusions of not less than 50% of the total number of those in steel have such a morphology that Mg—Al—O-based oxides exist at the central part of the inclusion, Ca—Al-based oxides enclose the Mg—Al—O-based oxides, and Ti-containing-carbonitrides further exist on a periphery of the Ca—Al-based oxides.
摘要翻译：本发明提供一种同时满足多种特性的钢，具体地说，具有优异的耐硫化物应力开裂性的钢，其包括C：0.2〜0.7％， Si：0.01〜0.8％ Mn：0.1〜1.5％ S：不超过0.005％; P：不大于0.03％; Al：0.0005〜0.1％ Ti：0.005〜0.05％ Ca：0.0004〜0.005％ N：不大于0.007％; Cr：0.1〜1.5％和Mo：0.2〜1.0％余量为Fe，Mg和杂质，其特征在于：Mg的含量不小于1.0ppm且不大于5.0ppm; 并且不少于钢总数的50％的夹杂物具有在夹杂物的中心部存在Mg-Al-O系氧化物的形态，Ca-Al系氧化物包围Mg-Al- O型氧化物和含Ti的碳氮化物进一步存在于Ca-Al系氧化物的周围。

2. 发明授权

US09175371B2 Steel for steel tube with excellent sulfide stress cracking resistance 有权
标题翻译：钢管用于钢管，具有优良的耐硫化物应力开裂性能
公开(公告)号：US09175371B2
公开(公告)日：2015-11-03
申请号：US13702763
申请日：2011-05-25
申请人： Mitsuhiro Numata , Tomohiko Omura , Masayuki Morimoto , Toru Takayama , Atsushi Soma
发明人： Mitsuhiro Numata , Tomohiko Omura , Masayuki Morimoto , Toru Takayama , Atsushi Soma
IPC分类号： C22C38/28 , C22C38/22 , C22C38/32 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/26 , C21D8/02
CPC分类号： C22C38/32 , C21D8/0247 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28
摘要： The present invention provides a steel which simultaneously satisfies a plurality of characteristics, specifically, a steel for tubes with excellent sulfide stress cracking resistance, including, C: 0.2 to 0.7%; Si: 0.01 to 0.8%; Mn: 0.1 to 1.5%; S: not more than 0.005%; P: not more than 0.03%; Al: 0.0005 to 0.1%; Ti: 0.005 to 0.05%; Ca: 0.0004 to 0.005%; N: not more than 0.007%; Cr: 0.1 to 1.5%; and Mo: 0.2 to 1.0%; the balance being Fe, Mg and impurities, being characterized in that: the content of Mg is not less than 1.0 ppm and not more than 5.0 ppm; and inclusions of not less than 50% of the total number of those in steel have such a morphology that Mg—Al—O-based oxides exist at the central part of the inclusion, Ca—Al-based oxides enclose the Mg—Al—O-based oxides, and Ti-containing-carbonitrides further exist on a periphery of the Ca—Al-based oxides.
摘要翻译：本发明提供一种同时满足多种特性的钢，具体地说，具有优异的耐硫化物应力开裂性的钢，其包括C：0.2〜0.7％， Si：0.01〜0.8％ Mn：0.1〜1.5％ S：不超过0.005％; P：不大于0.03％; Al：0.0005〜0.1％ Ti：0.005〜0.05％ Ca：0.0004〜0.005％ N：不大于0.007％; Cr：0.1〜1.5％和Mo：0.2〜1.0％余量为Fe，Mg和杂质，其特征在于：Mg的含量不小于1.0ppm且不大于5.0ppm; 并且不少于钢总数的50％的夹杂物具有在夹杂物的中心部存在Mg-Al-O系氧化物的形态，Ca-Al系氧化物包围Mg-Al- O型氧化物和含Ti的碳氮化物进一步存在于Ca-Al系氧化物的周围。

3. 发明授权

US09777352B2 Oil-well steel pipe having excellent sulfide stress cracking resistance 有权
公开(公告)号：US09777352B2
公开(公告)日：2017-10-03
申请号：US14239829
申请日：2012-08-17
申请人： Atsushi Soma , Tomohiko Omura , Yuji Arai , Mitsuhiro Numata , Toru Takayama , Masanao Seo
发明人： Atsushi Soma , Tomohiko Omura , Yuji Arai , Mitsuhiro Numata , Toru Takayama , Masanao Seo
IPC分类号： C22C38/32 , C22C38/00 , C22C38/28 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C21D8/10 , C21D9/08 , C21D9/00
CPC分类号： C22C38/32 , C21D8/105 , C21D9/00 , C21D9/08 , C21D9/085 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , Y02P10/212
摘要： To provide an oil-well steel pipe having excellent SSC resistance. The oil-well steel pipe according to the present invention contains, by mass percent, C: 0.15 to 0.35%, Si: 0.1 to 0.75%, Mn: 0.1 to 1.0%, Cr: 0.1 to 1.7%, Mo: 0.1 to 1.2%, Ti: 0.01 to 0.05%, Nb: 0.010 to 0.030%, Al: 0.01 to 0.1%, P: at most 0.03%, S: at most 0.01%, N: at most 0.007%, and O: at most 0.01%, the balance being Fe and impurities. The Ti content and the Nb content in a residue obtained by bromine-methanol extraction satisfy equation (1): 100×[Nb]/([Ti]+[Nb])≦27.5 (1) where the Ti content (mass %) and the Nb content (mass %) in the residue are substituted for [Ti] and [Nb].

4. 发明授权

US08262767B2 Method of producing steel for steel pipe excellent in sour-resistance performance 有权
标题翻译：钢管耐腐蚀性能优良的钢管生产方法
公开(公告)号：US08262767B2
公开(公告)日：2012-09-11
申请号：US13103135
申请日：2011-05-09
申请人： Mitsuhiro Numata , Shingo Takeuchi , Tomohiko Omura
发明人： Mitsuhiro Numata , Shingo Takeuchi , Tomohiko Omura
IPC分类号： C21C5/28 , C21C7/064 , C21C7/072 , C21C7/10
CPC分类号： C21C7/06 , C21C7/0075 , C21C7/04 , C21C7/064 , C21C7/10 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A method of producing steel for a steel pipe excellent in sour-resistance performance comprises controlling the amount of Ca addition charged into a molten steel in a ladle according to a N content in the molten steel prior to Ca addition. Non-metallic inclusions in the steel are mainly composed of Ca, Al, 0 and S, and a CaO content in the inclusions is in the range of 30 to 80%, the ratio of the N content in the steel to the CaO content in the inclusions satisfying equation (1), and a CaS content in the inclusions satisfies equation (2), 0.28≦[N]/(% CaO)≦2.0 (1) (% CaS)≦25% (2) where [N] represents the mass content (ppm) of N in the steel, (% CaO) represents the mass content (%) of CaO in the inclusions, and (% CaS) represents the mass content (%) of CaS in the inclusions.
摘要翻译：耐酸性优异的钢管用钢的制造方法，其特征在于，在Ca添加之前，根据钢水中的N含量，控制钢水中加入的钢水量。钢中的非金属夹杂物主要由Ca，Al，O和S组成，夹杂物中的CaO含量在30〜80％的范围内，钢中的N含量与CaO含量的比例满足式（1）的夹杂物和夹杂物中的CaS含量满足式（2），0.28＆nlE; [N] /（％CaO）＆nlE; 2.0（1）（％CaS）＆nlE; 25％ [N]表示钢中N的质量含量（ppm），（CaO）表示夹杂物中的CaO的质量含量（％），（％CaS）表示夹杂物中CaS的质量含量（％）。

5. 发明授权

US07635406B2 Method for manufacturing a low alloy steel excellent in corrosion resistance 有权
标题翻译：制造耐腐蚀性优异的低合金钢的方法
公开(公告)号：US07635406B2
公开(公告)日：2009-12-22
申请号：US11523070
申请日：2006-09-19
申请人： Mitsuhiro Numata , Tomohiko Omura , Yoshihiko Higuchi
发明人： Mitsuhiro Numata , Tomohiko Omura , Yoshihiko Higuchi
IPC分类号： C22C38/28 , C22C38/22 , C21C7/00
CPC分类号： C22C38/02 , C21C7/04 , C22C38/04 , C22C38/22
摘要： A low alloy steel, which has a chemical composition by mass %, of C: 0.1 to 0.55%, Si: 0.05 to 0.5%, Mn: 0.1 to 1%, S: 0.0001 to 0.005%, Al: 0.005 to 0.08%, Ti: 0.005 to 0.05%, Cr: 0.1 to 1.5%, Mo: 0.1 to 1%, O: 0.0004 to 0.005%, Ca: 0.0005 to 0.0045%, Nb: 0 to 0.1%, V: 0 to 0.5%, B: 0 to 0.005%, Zr: 0 to 0.10%, P≦0.03%, and N≦0.006%, with the balance being Fe and impurities, is manufactured by adjusting the value of ([Ti]/47.9)([N]/14)/([Ca])/40.1) satisfies not less than 0.0008 and not more than 0.0066, at the time of melting the said low alloy steel, wherein [Ti], [N] and [Ca] are the contents in the molten steel by mass % of Ti, N and Ca respectively. The thus-manufactured low steel alloy has a high SSC resistance with a yield stress of not less than 758 MPa.
摘要翻译：以质量％计含有C：0.1〜0.55％，Si：0.05〜0.5％，Mn：0.1〜1％，S：0.0001〜0.005％，Al：0.005〜0.08％的低合金钢， Ti：0.005〜0.05％，Cr：0.1〜1.5％，Mo：0.1〜1％，O：0.0004〜0.005％，Ca：0.0005〜0.0045％，Nb：0〜0.1％，V：0〜0.5％通过调节（[Ti] /47.9）（[Ti] / 47.9）的值，制造0〜0.005％，Zr：0〜0.10％，P <0.03％，N <0.006％ N] / 14）/（[Ca]）/ 40.1）在熔融所述低合金钢时满足不小于0.0008且不大于0.0066，其中[Ti]，[N]和[Ca] Ti，N，Ca的质量％分别为钢水含量。这样制造的低钢合金具有高耐SSC性，屈服应力不小于758MPa。

6. 发明申请

US20070217942A1 Steel Product for Use as Line Pipe Having High Hic Resistance and Line Pipe Produced Using Such Steel Product 有权
标题翻译：钢制产品用作具有高耐热性的管线和使用这种钢产品生产的管线
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。

7. 发明授权

US07959709B2 Method of producing steel for steel pipe excellent in sour-resistance performance 有权
标题翻译：钢管耐腐蚀性能优良的钢管生产方法
公开(公告)号：US07959709B2
公开(公告)日：2011-06-14
申请号：US12629182
申请日：2009-12-02
申请人： Mitsuhiro Numata , Shingo Takeuchi , Tomohiko Omura
发明人： Mitsuhiro Numata , Shingo Takeuchi , Tomohiko Omura
IPC分类号： C21C5/28 , C21C7/064 , C21C7/072 , C21C7/10
CPC分类号： C21C7/06 , C21C7/0075 , C21C7/04 , C21C7/064 , C21C7/10 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A method of producing steel pipe excellent in sour-resistance performance, uses comprises controlling the amount of Ca addition charged into molten steel in a ladle according to a N content in the molten steel prior to Ca addition. As a result of the controlling step, a CaO content in the inclusions is in the range of 30 to 80%, the ratio of the N content in the steel to the CaO content in the inclusions satisfies the relation expressed by equation (1), and a CaS content in the inclusions satisfies the relation expressed by equation (2). 0.28≦[N]/(% CaO)≦2.0 (1) (% CaS)≦25% (2) where [N] represents the mass content (ppm) of N in the steel, (% CaO) represents the mass content (%) of CaO in the inclusions, and (% CaS) represents the mass content (%) of CaS in the inclusions.
摘要翻译：一种耐酸性优异的钢管的制造方法，其特征在于，在Ca添加之前，根据钢水中的N含量来控制钢水中加入的Ca的添加量。作为控制步骤的结果，夹杂物中的CaO含量在30〜80％的范围内，钢中的N含量与夹杂物中的CaO含量的比例满足式（1）所示的关系，并且夹杂物中的CaS含量满足由式（2）表示的关系。 0.28＆nlE; [N] /（％CaO）＆nlE; 2.0（1）（％CaS）＆nlE; 25％（2）其中[N]表示钢中N的质量含量（ppm）夹杂物中CaO的质量含量（％）和（％CaS）表示夹杂物中CaS的质量含量（％）。

8. 发明申请

US20060016520A1 Steel for steel pipes 有权
标题翻译：钢管钢
公开(公告)号：US20060016520A1
公开(公告)日：2006-01-26
申请号：US11181970
申请日：2005-07-15
申请人： Mitsuhiro Numata , Tomohiko Omura , Yoshihiko Higuchi
发明人： Mitsuhiro Numata , Tomohiko Omura , Yoshihiko Higuchi
IPC分类号： C22C38/60
CPC分类号： C22C38/22 , C22C38/02 , C22C38/04
摘要： A steel for steel pipes which comprises, on the percent by mass basis, C: 0.2 to 0.7%, Si: 0.01 to 0.8%, Mn: 0.1 to 1.5%, S: 0.005% or less, P: 0.03% or less, Al: 0.0005 to 0.1%, Ti: 0.005 to 0.05%, Ca: 0.0004 to 0.005%, N: 0.007% or less, Cr: 0.1 to 1.5%, Mo: 0.2 to 1.0%, Nb: 0 to 0.1%, Zr: 0 to 0.1%, V: 0 to 0.5% and B: 0 to 0.005%, with the balance being Fe and impurities, in which non-metallic inclusions containing Ca, Al, Ti, N, O, and S are present, and in the said inclusions (Ca %)/(Al %) is 0.55 to 1.72, and (Ca %)/(Ti %) is 0.7 to 19 can be used as a raw material for oil country tubular goods, being used at a greater depth and in severer corrosive circumstances, such as casings and tubings for oil and/or natural gas wells, drilling pipes and drilling collars for excavation, and the like.
摘要翻译：钢管用钢，以质量％计含有C：0.2〜0.7％，Si：0.01〜0.8％，Mn：0.1〜1.5％，S：0.005％以下，P：0.03％以下， Al：0.0005〜0.1％，Ti：0.005〜0.05％，Ca：0.0004〜0.005％，N：0.007％以下，Cr：0.1〜1.5％，Mo：0.2〜1.0％，Nb：0〜0.1％：0〜0.1％，V：0〜0.5％，B：0〜0.005％，余量为含有Ca，Al，Ti，N，O，S的非金属夹杂物的Fe和杂质，所述夹杂物（Ca％）/（Al％）为0.55〜1.72，（Ca％）/（Ti％）为0.7〜19可用作油井筒用原料，更严格的腐蚀性环境，例如石油和/或天然气井的套管和管道，钻井管道和用于挖掘的钻铤等。

9. 发明申请

US20100071509A1 METHOD OF PRODUCING STEEL FOR STEEL PIPE EXCELLENT IN SOUR-RESISTANCE PERFORMANCE 有权
标题翻译：钢管生产钢铁耐腐蚀性能优良的方法
公开(公告)号：US20100071509A1
公开(公告)日：2010-03-25
申请号：US12629182
申请日：2009-12-02
申请人： Mitsuhiro Numata , Shingo Takeuchi , Tomohiko Omura
发明人： Mitsuhiro Numata , Shingo Takeuchi , Tomohiko Omura
IPC分类号： C21C7/04
CPC分类号： C21C7/06 , C21C7/0075 , C21C7/04 , C21C7/064 , C21C7/10 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06
摘要： The steel for steel pipes of the present invention is the one for steel pipes excellent in sour-resistance performance including C, Mn, Si, P, S, Ti, Al, Ca, N and O, and optionally including a predetermined amount of one or more of Cr, Ni, Cu, Mo, V, B and Nb, in which inclusions in the steel have Ca, Al, O and S as main components, the CaO content in the inclusions is 30 to 80%, the ratio of the N content in the steel (ppm) to the CaO content in the inclusions (%) is from 0.28 to 2.0, and the CaS content in the inclusions is 25% or less. In addition, the method of producing steel for steel pipes of the present invention is to produce steel for steel pipes in which Ca is added so that the ratio of the N content in the steel to the amount of Ca addition (kg/t) into the molten steel is from 200 to 857. According to the production method of the present invention, a slag composition, temperature-raising heating of molten steel, stirring treatment of molten steel and slag, and the Ca addition are optimized, whereby high-strength HIC resistant steel for steel pipes that exhibit excellent sour-resistance performance and cleanliness can be stably manufactured.
摘要翻译：本发明的钢管用钢是耐酸性优异的钢管，包括C，Mn，Si，P，S，Ti，Al，Ca，N和O，并且可选地包括预定量的一种以含有Ca，Al，O，S为主成分的Cr，Ni，Cu，Mo，V，B，Nb为主成分，夹杂物的CaO含量为30〜80％钢中的N含量（ppm）与夹杂物中的CaO含量（％）为0.28〜2.0，夹杂物中的CaS含量为25％以下。另外，本发明的钢管用钢的制造方法是，生产加入了Ca的钢管，使钢中的N含量与Ca添加量的比例（kg / t）变成钢水为200〜857。根据本发明的制造方法，优化炉渣组成，钢水升温加热，钢水和渣的搅拌处理以及Ca添加，优化了高强度可以稳定地制造具有优异的耐酸性能和清洁度的用于钢管的HIC耐钢。

10. 发明授权

US07648587B2 Steel product for use as line pipe having high HIC resistance and line pipe produced using such steel product 有权
标题翻译：钢产品用作具有高HIC电阻的管线管和使用这种钢产品生产的管线管
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。

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