NO20061052L - Sveiset struktur med utmerket motstand mot spenningskorrosjonsprekking - Google Patents

Sveiset struktur med utmerket motstand mot spenningskorrosjonsprekking

Info

Publication number
NO20061052L
NO20061052L NO20061052A NO20061052A NO20061052L NO 20061052 L NO20061052 L NO 20061052L NO 20061052 A NO20061052 A NO 20061052A NO 20061052 A NO20061052 A NO 20061052A NO 20061052 L NO20061052 L NO 20061052L
Authority
NO
Norway
Prior art keywords
stress corrosion
excellent resistance
corrosion cracking
welded structure
scc
Prior art date
Application number
NO20061052A
Other languages
English (en)
Other versions
NO339014B1 (no
Inventor
Hisashi Amaya
Kunio Kondo
Kazuhiro Oagawa
Masayuki Sagara
Hiroyuki Hirata
Original Assignee
Sumitomo Metal Ind
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Ind filed Critical Sumitomo Metal Ind
Publication of NO20061052L publication Critical patent/NO20061052L/no
Publication of NO339014B1 publication Critical patent/NO339014B1/no

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
    • B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
    • B23K9/0286—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550°C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent
    • B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/10—Pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B23K2103/05—Stainless steel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • Y10T428/12979—Containing more than 10% nonferrous elements [e.g., high alloy, stainless]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Arc Welding In General (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Heat Treatment Of Articles (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

Foreliggende oppfinnelse omhandler en sveiset rørledningsstruktur for transport av korrosiv petroleum eller naturgass. Den omfatter rustfrie martensittstålrør inneholdende 8-16 % Cr og på det meste 0,05 % C. Ved å hensiktsmessig regulere sveisebetingelsene ved rundsveising av stålrørene for å sikre at Cr-konsentrasjonen ved Cr-utarmete korngrensedeler, som finnes umiddelbart under et sveiseglødeskall er minst 5 %, kan forekomsten av SCC i et C02-MiljØ ved høy temperatur forebygges.
NO20061052A 2003-09-05 2006-03-03 Sveiset rørledningsstruktur med forbedret motstand mot stresskorrosjonssprekkdannelse NO339014B1 (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/011360 WO2005023478A1 (ja) 2003-09-05 2003-09-05 耐応力腐食割れ性に優れた溶接構造物

Publications (2)

Publication Number Publication Date
NO20061052L true NO20061052L (no) 2006-04-03
NO339014B1 NO339014B1 (no) 2016-11-07

Family

ID=34260138

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20061052A NO339014B1 (no) 2003-09-05 2006-03-03 Sveiset rørledningsstruktur med forbedret motstand mot stresskorrosjonssprekkdannelse

Country Status (12)

Country Link
US (1) US7238434B2 (no)
EP (3) EP2258507B1 (no)
JP (1) JP4400568B2 (no)
CN (1) CN100500361C (no)
AR (1) AR045580A1 (no)
AT (1) ATE538894T1 (no)
AU (1) AU2003261962B2 (no)
BR (1) BRPI0318495B1 (no)
CA (1) CA2536051C (no)
MX (1) MXPA06002478A (no)
NO (1) NO339014B1 (no)
WO (1) WO2005023478A1 (no)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0419207B1 (pt) * 2004-12-07 2017-03-21 Nippon Steel & Sumitomo Metal Corp produto tubular para campos de petróleo de aço inoxidável martensítico
JP2007321181A (ja) * 2006-05-31 2007-12-13 Jfe Steel Kk マルテンサイト系ステンレス鋼材溶接部の形成方法
US9040865B2 (en) 2007-02-27 2015-05-26 Exxonmobil Upstream Research Company Corrosion resistant alloy weldments in carbon steel structures and pipelines to accommodate high axial plastic strains
DE102008037085B3 (de) * 2008-08-08 2009-08-06 Alstom Technology Ltd. Verfahren zur Herstellung von Dampferzeuger-Rohrwänden bestehend aus überwiegend 9-12% chromhaltigen, martensitischen Stählen
KR100909118B1 (ko) 2008-10-09 2009-07-23 한국항공대학교산학협력단 응력 부식균열 형성장치
CN102191436A (zh) * 2010-03-19 2011-09-21 宝山钢铁股份有限公司 一种综合性能良好的马氏体不锈钢及其制造方法
ES2643150T3 (es) * 2010-05-31 2017-11-21 Jfe Steel Corporation Lámina estructural de acero inoxidable que tiene excelente resistencia a la corrosión en la parte soldada, y método para producir la misma
JP5880032B2 (ja) * 2011-12-27 2016-03-08 トヨタ自動車株式会社 レーザー溶接方法
JP5842854B2 (ja) * 2013-04-04 2016-01-13 トヨタ自動車株式会社 ステンレス鋼およびその製造方法
CN105917015B (zh) * 2014-01-17 2017-10-03 新日铁住金株式会社 马氏体系含Cr钢和油井用钢管
CN104625345B (zh) * 2014-12-30 2016-11-30 上海锅炉厂有限公司 C-hra-3高温镍基合金焊接工艺
CN107643199B (zh) * 2017-09-25 2019-11-15 国网山东省电力公司电力科学研究院 一种钢试样内部预制裂纹缺陷的方法
US11426824B2 (en) 2017-09-29 2022-08-30 Lincoln Global, Inc. Aluminum-containing welding electrode
US11529697B2 (en) * 2017-09-29 2022-12-20 Lincoln Global, Inc. Additive manufacturing using aluminum-containing wire
RU2703767C1 (ru) * 2018-06-01 2019-10-22 Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") Труба нефтяного сортамента из коррозионно-стойкой стали мартенситного класса
JP7082541B2 (ja) * 2018-07-20 2022-06-08 三菱重工業株式会社 補修溶接方法
CN113939607B (zh) 2019-07-24 2022-06-28 日本制铁株式会社 马氏体系不锈钢钢管和马氏体系不锈钢钢管的制造方法
CN117363971B (zh) * 2022-07-01 2026-02-13 中国石油天然气集团有限公司 一种大口径中Cr合金高频焊接焊管及加工方法
CN115464302B (zh) * 2022-10-14 2024-10-29 中国航发北京航空材料研究院 一种多活性组元钎料及原位生成高熵陶瓷相接头的方法
CN119776737B (zh) * 2025-03-11 2025-07-01 上海宇洋特种金属材料有限公司 一种耐磨焊管用钢及其制备方法和焊管

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275893A (en) * 1991-12-11 1994-01-04 Nippon Steel Corporation Line pipe having good corrosion-resistance and weldability
JPH07179943A (ja) 1993-12-22 1995-07-18 Nippon Steel Corp 耐食性に優れた高靭性マルテンサイト系ステンレス鋼継目無鋼管の製造法
JP3116156B2 (ja) * 1994-06-16 2000-12-11 新日本製鐵株式会社 耐食性および溶接性に優れた鋼管の製造方法
JPH08132238A (ja) * 1994-11-10 1996-05-28 Nippon Steel Corp 高Ｃｒ鋼の溶接方法
DK0864663T3 (da) * 1995-09-27 2003-09-15 Sumitomo Metal Ind Svejsede stålstrukturer med høj styrke og fremragende korrosionsmodstand
JP3533055B2 (ja) 1996-03-27 2004-05-31 Ｊｆｅスチール株式会社 耐食性および溶接性に優れたラインパイプ用マルテンサイト鋼
JPH09327721A (ja) * 1996-06-11 1997-12-22 Nkk Corp 溶接性に優れたマルテンサイト系ステンレス溶接鋼管の製造方法
JPH11291084A (ja) * 1998-04-08 1999-10-26 Nippon Steel Corp 高強度・高靱性ステンレス鋼溶接用フラックス入りワイヤ
JP2000015447A (ja) * 1998-07-07 2000-01-18 Nippon Steel Corp マルテンサイト系ステンレス鋼の溶接方法
JP2000080416A (ja) * 1998-08-31 2000-03-21 Kawasaki Steel Corp 溶接性および耐食性に優れたラインパイプ用高Ｃｒマルテンサイト溶接鋼管の製造方法
JP3504518B2 (ja) * 1998-11-30 2004-03-08 日鐵住金溶接工業株式会社 マルテンサイト系ステンレス鋼の溶接材料ならびに溶接継手およびその製造方法
CN1093450C (zh) * 1999-01-28 2002-10-30 北京工业大学 时效马氏体钢钨极氩弧焊金属粉芯焊丝及其制造方法
WO2001010591A1 (en) * 1999-08-06 2001-02-15 Sumitomo Metal Industries, Ltd. Martensite stainless steel welded steel pipe
JP3506088B2 (ja) * 2000-02-03 2004-03-15 住友金属工業株式会社 耐疲労特性に優れたコイルドチュービング用マルテンサイト系ステンレス鋼とそれからの製造法
JP2002331387A (ja) * 2001-05-07 2002-11-19 Nippon Steel Corp 高靱性マルテンサイト系ステンレス鋼用溶接ワイヤ
JP4144283B2 (ja) * 2001-10-18 2008-09-03 住友金属工業株式会社 マルテンサイト系ステンレス鋼

Also Published As

Publication number Publication date
CN100500361C (zh) 2009-06-17
CA2536051C (en) 2009-07-14
ATE538894T1 (de) 2012-01-15
NO339014B1 (no) 2016-11-07
EP2258507A3 (en) 2010-12-15
WO2005023478A1 (ja) 2005-03-17
CA2536051A1 (en) 2005-03-17
JPWO2005023478A1 (ja) 2006-11-02
JP4400568B2 (ja) 2010-01-20
US20060201587A1 (en) 2006-09-14
BR0318495A (pt) 2006-09-12
AR045580A1 (es) 2005-11-02
BRPI0318495B1 (pt) 2015-06-16
CN1826202A (zh) 2006-08-30
MXPA06002478A (es) 2006-06-20
US7238434B2 (en) 2007-07-03
EP1661655A1 (en) 2006-05-31
EP2289662A3 (en) 2012-12-05
EP1661655A4 (en) 2008-06-18
AU2003261962B2 (en) 2009-01-08
EP2289662A2 (en) 2011-03-02
AU2003261962A1 (en) 2005-03-29
EP2258507B1 (en) 2013-12-18
EP1661655B1 (en) 2011-12-28
EP2258507A2 (en) 2010-12-08

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