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1. 发明授权

US06532995B1 Super-high-strength line pipe excellent in low temperature toughness and production method thereof 有权
标题翻译：低温韧性优异的超高强度线管及其制造方法
公开(公告)号：US06532995B1
公开(公告)日：2003-03-18
申请号：US09478653
申请日：2000-01-06
申请人： Hitoshi Asahi , Hiroshi Tamehiro , Takuya Hara , Yoshio Terada , Shigeru Ohkita , Kunio Koyama
发明人： Hitoshi Asahi , Hiroshi Tamehiro , Takuya Hara , Yoshio Terada , Shigeru Ohkita , Kunio Koyama
IPC分类号： F16L900
CPC分类号： C22C38/12 , C22C38/04 , C22C38/08 , C22C38/44 , C22C38/46 , C22C38/58 , Y10T29/18
摘要： To provide a super-high strength line pipe that is excellent in low temperature toughness, can be field welded easily, and has a tensile strength of at least 900 MPa (exceeding ×100 of the API standard), and a production method thereof. The present invention relates to a super-high strength line pipe produced by shaping a steel plate into a pipe shape and arc welding seam portions, the strength of a base steel portion is 900 to 1,100 MPa and the strength of the weld metal is higher than the base steel strength −100 MPa. In the steel pipe, the Ni content of the weld metal is higher by at least 1% than that of the base steel. The combination of the chemical components of the steel plate with those of the weld metal, for accomplishing these steel pipes by a U&O step is shown concretely. A production method of the steel plate and the welding method for achieving the steel pipe are also described. Furthermore, a method of reducing the strength of the inner surface of the weld metal to restrict cracking at the time of pipe expansion is also shown.
摘要翻译：为了提供低温韧性优异的超高强度线管，可以容易地进行现场焊接，并且具有至少900MPa（超过API标准的×100）的拉伸强度及其制造方法。本发明涉及一种通过将钢板成形为管状和电弧焊缝部而制造的超高强度线管，基部钢的强度为900〜1100MPa，焊接金属的强度高于基钢强度-100MPa。在钢管中，焊接金属的Ni含量比基体钢高1％以上。具体地说，钢板的化学成分与焊接金属的化学成分的组合，通过U＆O工序来实现这些钢管。还描述了钢板的制造方法和用于实现钢管的焊接方法。此外，还示出了降低焊接金属内表面的强度以限制管膨胀时的开裂的方法。

2. 发明授权

US06428633B1 Steel for welded structures and welding wire 有权
标题翻译：焊接结构钢和焊丝
公开(公告)号：US06428633B1
公开(公告)日：2002-08-06
申请号：US09174848
申请日：1998-10-19
申请人： Tadashi Kasuya , Shigeru Ohkita , Masao Fuji , Naoki Saitou , Junichi Kobayashi , Toshihiko Chiba
发明人： Tadashi Kasuya , Shigeru Ohkita , Masao Fuji , Naoki Saitou , Junichi Kobayashi , Toshihiko Chiba
IPC分类号： C22C3808
CPC分类号： C22C38/46 , B23K33/00 , B23K33/004 , B23K35/3066 , B23K35/3086 , C22C38/08 , C22C38/44 , C22C38/48 , C22C38/50
摘要： In order to conduct welding so that the welded steel shows a decreased residual stress after welding without a post treatment such as a PWHT, the steel for welded structures and the welding wire of the present invention starts a transformation from austenite into martensite at a temperature (Ms temperature) from at least 200° C. to up to 350° C., and has a yield strength from at least 60 kg/mm2 to up to 120 kg/mm2 at the transformation starting temperature. The multipass welding process of the present invention comprises forming a weld metal having a Ms temperature of 150° C. to 300° C., and TIG remelt-run welding the surface of the final layer.
摘要翻译：为了进行焊接，焊接后的焊接钢在PWHT等后处理中显示出残留应力降低，本发明的焊接结构用钢和焊丝开始在温度（奥氏体）向奥氏体转变为马氏体 Ms温度）从至少200℃至高达350℃，并且在转变开始温度下的屈服强度从至少60kg / mm 2至高达120kg / mm 2。本发明的多焊接方法包括形成Ms温度为150℃至300℃的焊接金属，并且TIG重熔焊接最终层的表面。

3. 发明授权

US6159310A Wire for welding high-chromium steel 失效
标题翻译：钢丝焊接高铬钢
公开(公告)号：US6159310A
公开(公告)日：2000-12-12
申请号：US308502
申请日：1999-05-17
申请人： Hiroshige Inoue , Toshihiko Koseki , Shigeru Ohkita
发明人： Hiroshige Inoue , Toshihiko Koseki , Shigeru Ohkita
IPC分类号： B23K9/23 , B23K35/30 , C22C38/00 , C22C38/44 , C22C38/50 , C22C38/58 , C22C38/40
CPC分类号： B23K35/3086
摘要： To form a weld metal having improved hot cracking resistance, low temperature cracking resistance, toughness, strength, and corrosion resistance when welding high Cr steels containing 7.5 wt % or more Cr, the filler wire of the present invention has the ratio of Cr equivalent/Ni equivalent of 1.8 to 2.8 and the product: of Cr equivalent.times.Ni equivalent of 100 to 140, where Cr equivalent=Cr+Mo+1.5 Si, Ni equivalent=Ni+0.5 Mn+30C; and forms a weld metal having a ternary phase microstructure composed of austenite, ferrite and martensite phases during the gas-shielded arc welding. The filler wire of the present invention typically consists of 0.005-0.12 wt % C, 0.01-1.0 wt % Si, 0.02-2.0 wt % Mn, 12.0-17.0 wt % Cr, 5.0-8.0 wt % Ni, 1.0-3.0 wt % Mo, and the balance of Fe and unavoidable impurities, the impurities including 0.03 wt % or less P and 0.01 wt % or less S.
摘要翻译： PCT No.PCT / JP97 / 04190 Sec。 371日期1999年5月17日 102（e）日期1999年5月17日PCT 1997年11月18日PCT公布。公开号WO98 / 22255 日期1998年5月28日为了形成在含有7.5重量％以上的Cr的高Cr钢的焊接时，具有改善的耐热裂纹性，耐低温龟裂性，韧性，强度和耐腐蚀性的焊接金属，本发明的填充丝的比例 Cr当量/ Ni当量为1.8〜2.8，Cr当量为Ni〜100当量的比例为100〜140，Cr当量= Cr + Mo + 1.5 Si，Ni当量= Ni + 0.5 Mn + 30℃。并且在气体保护电弧焊接期间形成具有由奥氏体，铁素体和马氏体相组成的三元相微结构的焊接金属。本发明的填充丝通常由0.005-0.12重量％C，0.01-1.0重量％Si，0.02-2.0重量％Mn，12.0-17.0重量％Cr，5.0-8.0重量％Ni，1.0-3.0重量％ Mo，余量由Fe和不可避免的杂质构成，杂质含有0.03重量％以下的P和0.01重量％以下的S.

4. 发明授权

US5514332A Titanium for conductor conduit in superconducting coil 失效
标题翻译：用于超导线圈导体导管的钛
公开(公告)号：US5514332A
公开(公告)日：1996-05-07
申请号：US162077
申请日：1994-05-16
申请人： Takao Horiya , Shigeru Ohkita , Toshiaki Nishida , Hirofumi Yoshimura , Naoomi Yamada , Masayuki Yamamoto , Hideo Nakajima , Toshinari Andou
发明人： Takao Horiya , Shigeru Ohkita , Toshiaki Nishida , Hirofumi Yoshimura , Naoomi Yamada , Masayuki Yamamoto , Hideo Nakajima , Toshinari Andou
IPC分类号： H01B12/00 , C22C14/00 , H01B12/16 , H01F6/00 , H01L39/24
CPC分类号： H01L39/2409 , C22C14/00
摘要： Titanium having a thermal shrinkage factor close to that of Nb.sub.3 Sn superconducting wire, whereby it gives rise to little degradation of the properties of the superconducting wire and also offers a good balance between strength and toughness at liquid helium temperature, making it highly suitable as a conduit pipe material used as a seal for liquid helium for high-magnetic-field superconducting coil applications. The present invention focusses on the major effect on strength and toughness of titanium material that the oxygen content has, and appropriately controls the oxygen and other impurities content of pure titanium to provide titanium material comprising, in mass %, 0.07 to 0.13 percent O, up to 0.10 percent Fe, up to 0.10 percent C+N, and up to 0.005 percent H, with the remainder being Ti and unavoidable impurities, said titanium exhibiting mechanical properties and fracture toughness of base metal and welded portions which meet the requirements for use as titanium for conductor conduit in superconducting coil.
摘要翻译： PCT No.PCT / JP93 / 00463 Sec。 371日期1994年5月16日 102（e）日期1994年5月16日PCT提交1993年4月12日PCT公布。公开号WO93 / 21354 日期为1993年10月28日。热收缩率接近Nb3Sn超导线的钛，由此导致超导线性能的降低很小，并且在液氦温度下的强度和韧性之间也有很好的平衡，使其非常适合用作用于高磁场超导线圈应用的液氦密封件的导管材料。本发明集中于对氧含量具有的钛材料的强度和韧性的主要影响，并且适当地控制纯钛的氧和其它杂质含量以提供钛材料，其以质量％计含有0.07-0.13％的O，至0.10％的Fe，高达0.10％的C + N和至多0.005％的H，其余为Ti和不可避免的杂质，所述钛显示出基体金属和焊接部分的机械性能和断裂韧性，满足使用要求超导线圈导体导管用钛。

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