[go: up one dir, main page]

US20080302450A1 - Object Comprising a Steel Part of Metal Construction Consisting of an Area Welded by a High Power Density Beam and Exhibiting an Excellent Toughness in a Molten Area, Method for Producing Said Object - Google Patents

Object Comprising a Steel Part of Metal Construction Consisting of an Area Welded by a High Power Density Beam and Exhibiting an Excellent Toughness in a Molten Area, Method for Producing Said Object Download PDF

Info

Publication number
US20080302450A1
US20080302450A1 US11/631,517 US63151705A US2008302450A1 US 20080302450 A1 US20080302450 A1 US 20080302450A1 US 63151705 A US63151705 A US 63151705A US 2008302450 A1 US2008302450 A1 US 2008302450A1
Authority
US
United States
Prior art keywords
exp
welding
steel
zone
content
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/631,517
Other languages
English (en)
Inventor
Dominique Kaplan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ArcelorMittal France SA
Original Assignee
Arcelor France SA
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 Arcelor France SA filed Critical Arcelor France SA
Assigned to ARCELOR FRANCE reassignment ARCELOR FRANCE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAPLAN, DOMINIQUE
Publication of US20080302450A1 publication Critical patent/US20080302450A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • 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
    • C22C38/02—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
    • 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
    • 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
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Definitions

  • the present invention relates to metal constructions made of steel welded by a high-energy-density beam, and more particularly to those in which a minimum level of toughness is required in the melted zone so as to obviate the risk of a sudden fracture.
  • Assembling hot-rolled steel plates and sheets using a high-energy-density beam has developed particularly over the course of the last twenty years because of certain specific characteristics among which may be mentioned, for example, the very low deformation of the assemblies, the great precision in positioning the beam and the possibility of melting only the amount of material strictly necessary, the appearance of the weld beads requiring no finishing operation, and the possibility of dispensing with stress-relieving treatments.
  • the objective of the present invention is to provide such welded assemblies and a method for obtaining such assemblies from structural steels.
  • a first subject of the invention is an object comprising at least one part made of steel, the composition of which comprises, the contents being expressed by weight, carbon with a content of between 0.005 and 0.27%, manganese between 0.5 and 1.6%, silicon between 0.1 and 0.4%, chromium in a content of less than 2.5%, Mo in a content of less than 1%, optionally one or more elements chosen from nickel, copper, aluminum, niobium, vanadium, titanium, boron, zirconium and nitrogen, the balance being iron and impurities resulting from the smelting.
  • the steel part includes at least one zone melted by a high-energy-density beam, with a microstructure consisting of 60 to 75% self-tempered martensite and, to complement this, 40 to 25% lower bainite, and preferably 60 to 70% self-tempered martensite and, to complement this, 40 to 30% lower bainite.
  • the object is a steel pipe comprising at least one portion having a zone welded in the longitudinal or transverse direction.
  • the object consists of at least two hot-rolled or hot-forged plates of steel having the same or different compositions, of the same or different thickness, which are welded together.
  • the high-energy-density beam is a laser beam.
  • the high-density-energy beam is an electron beam.
  • Another subject of the invention is a method for producing one of the above objects, which comprises the steps consisting in:
  • the nitrogen content of the melted zone does not exceed 0.020% and the welding power, the welding rate and the possible preheating, post-heating or cooling means are chosen in such a way that the melted zone cools according to a parameter
  • CE I C+Mn/6+Si/24+Mo/4+Ni/12+Cu/15+(Cr(1 ⁇ 0.16 ⁇ square root over (Cr) ⁇ )/8)+ f ( B )
  • CE II C+Mn/3.6+Cu/20+Ni/9+Cr/5+Mo/4,
  • C, Mn, Si, Mo, Ni, Cu, Cr, B and N denote, respectively, the carbon, manganese, silicon, molybdenum, nickel, copper, chromium, boron and nitrogen contents, expressed as percentages by weight, of said melted zone.
  • the welding is carried out homogeneously and autogenously by a laser beam, the nitrogen content of the steel does not exceed 0.020% and the welding power, the welding rate and the possible preheating, post-heating or cooling means are chosen in such a way that the melted zone cools according to a parameter
  • CE I C+Mn/6+Si/24+Mo/4+Ni/12+Cu/15+(Cr(1 ⁇ 0.16 ⁇ square root over (Cr) ⁇ )/8)+ f ( B )
  • CE II C+Mn/3.6+Cu/20+Ni/9+Cr/5+Mo/4,
  • C, Mn, Si, Mo, Ni, Cu, Cr, B and N denote, respectively, the carbon, manganese, silicon, molybdenum, nickel, copper, chromium, boron and nitrogen contents, expressed as percentages by weight, of the welded steel.
  • the welding is carried out autogenously and homogeneously by an electron beam, the nitrogen content of the steel does not exceed 0.022% and the welding power, the welding rate and the possible preheating, post-heating or cooling means are chosen in such a way that the zone melted by the electron beam cools according to a parameter
  • CE I C+Mn/6.67+Si/24+Mo/4+Ni/12+Cu/15+(Cr(1 ⁇ 0.16 ⁇ square root over (Cr) ⁇ )/8)+ f ( B )
  • CE II C+Mn/4+Cu/20+Ni/9+Cr/5+Mo/4,
  • C, Mn, Si, Mo, Ni, Cu, Cr, B and N denote, respectively, the carbon, manganese, silicon, molybdenum, nickel, copper, chromium, boron and nitrogen contents, expressed as percentages by weight, of the welded steel.
  • the steel part is welded to a steel workpiece having the same or different composition, of the same or different thickness, which may or may not form part of said object, using a metal filler product.
  • FIG. 1 illustrates the comparison between the hardness of the heat-affected zone (or HAZ) and that of the melted zone using laser welding and using electron beam welding of structural steels;
  • FIG. 2 shows the comparison between the Charpy V transition temperature at the 28 joule level (TK 28J ) of the heat-affected zone and that of the zone melted using laser welding and electron beam welding of structural steels;
  • FIG. 3 illustrates a typical variation in ductile-brittle transition temperature and in the hardness in the heat-affected zone of a structural steel as a function of the cooling rate
  • FIGS. 4 and 5 illustrate the influence of the amount of self-tempered martensite on the toughness in the melted zone in laser welding and in electron beam welding respectively.
  • FIG. 6 indicates the change in nitrogen content in the melted zone compared with that of the base metal during electron beam welding.
  • the welded part consists of two distinct zones:
  • the high-energy-density melted zone may be likened to a wide HAZ from the standpoint of the mechanical properties. This indicates that means for improving the toughness in the laser-melted zone can be based on the experience acquired previously in the field of HAZs.
  • FIG. 3 shows a typical example of the variation in the hardness and in the ductile-brittle transition temperature of the HAZ of a structural steel containing 0.04% C and 1.3% Mn as a function of the cooling rate after welding. This rate is characterized here by
  • the microstructures corresponding to the toughness optimum consist partly of self-tempered martensite, the tempering being due to the welding cycle itself, and partly lower bainite.
  • the self-tempered structure is characterized by the presence of fine carbides precipitated in the martensite laths.
  • FIG. 4 shows, that a proportion of self-tempered martensite of between 60 and 75%, combined as a complement with a proportion of lower bainite between 40 and 25%, results in excellent toughness in the laser-melted zone.
  • the proportion of martensite is more especially between 60 and 70% combined as a complement with a proportion of lower bainite between 40 and 30%, the transition temperature is below ⁇ 100° C., which means a particularly high level of toughness.
  • FIG. 5 relating to electron beam welding trials on structural steels, the carbon content of which is between 0.1 and 0.17%.
  • a 60 to 75% proportion of self-tempered martensite and, as a complement, 40 to 25% lower bainite is therefore particularly favorable for obtaining melted zones of excellent toughness in high-energy-density welding.
  • martensitic ⁇ ⁇ fraction ⁇ ⁇ f M log ⁇ ⁇ ⁇ ⁇ t B ⁇ ⁇ ⁇ t 500 800 / log ⁇ ⁇ ⁇ ⁇ t B ⁇ ⁇ ⁇ t M
  • ⁇ ⁇ ⁇ t ⁇ 800 500 ⁇ ⁇ ⁇ t B ⁇ exp - f M ⁇ ln ⁇ ( ⁇ ⁇ ⁇ t B / ⁇ ⁇ ⁇ t M )
  • the critical cooling times are related to the chemical composition through the following expressions:
  • CE I C+Mn/6+Si/24+Mo/4+Ni/12+Cu/15+(Cr(1 ⁇ 0.16 ⁇ square root over (Cr) ⁇ )/8)+ f ( B )
  • CE II C+Mn/3.6+Cu/20+Ni/9+Cr/5+Mo/4,
  • C, Mn, Si, Mo, Ni, Cu, Cr, B and N denote, respectively, the carbon, manganese, silicon, molybdenum, nickel, copper, chromium, boron and nitrogen contents, expressed as percentages by weight, of the steel.
  • the similarity between the HAZ and the melted zone in homogeneous autogeneous welding with a high-energy-density beam indicates that the above formulations valid for the HAZ are also applicable to the melted zone.
  • CE I C+Mn/6.67+Si/24+Mo/4+Ni/12+Cu/15+(Cr(1 ⁇ 0.16 ⁇ square root over (Cr) ⁇ )/8)+ f ( B )
  • CE II C+Mn/4+Cu/20+Ni/9+Cr/5+Mo/4,
  • C, Mn, Si, Mo, Ni, Cu, Cr, B and N denote, respectively, the carbon, manganese, silicon, molybdenum, nickel, copper, chromium, boron and nitrogen contents, expressed as percentages by weight, of the welded steel.
  • the invention may also be transposed to the case in which a steel part is welded to another steel workpiece of different composition, taking into account the relative participation of each element in forming the melted zone, that is to say the dilution factor.
  • the same remark also applies to the case of welding with a filler metal product, the composition and the dilution factor of which have to be taken into account so as to determine the composition of the melted zone.
  • the transition temperature determined from impact tensile tests on notched cylindrical specimens 4 mm in diameter, was ⁇ 120° C. This responds to excellent toughness and a high brittle fracture strength of pipes manufactured under these laser welding conditions.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)
  • Heat Treatment Of Articles (AREA)
  • Joining Of Building Structures In Genera (AREA)
US11/631,517 2004-07-05 2005-06-21 Object Comprising a Steel Part of Metal Construction Consisting of an Area Welded by a High Power Density Beam and Exhibiting an Excellent Toughness in a Molten Area, Method for Producing Said Object Abandoned US20080302450A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0407512 2004-07-05
FR0407512A FR2872442B1 (fr) 2004-07-05 2004-07-05 Assemblages soudes a haute densite d'energie d'aciers de construction metallique presentant une excellente tenacite dans la zone fondue, et methode de fabrication de ces assemblages soudes
PCT/FR2005/001543 WO2006013242A1 (fr) 2004-07-05 2005-06-21 Objet comprenant une partie en acier de construction metallique, cette partie comportant une zone soudee a l’aide d’un faisceau a haute densite d’energie et presentant une excellente tenacite dans la zone fondue ; metode de fabrication de cet objet

Publications (1)

Publication Number Publication Date
US20080302450A1 true US20080302450A1 (en) 2008-12-11

Family

ID=34947914

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/631,517 Abandoned US20080302450A1 (en) 2004-07-05 2005-06-21 Object Comprising a Steel Part of Metal Construction Consisting of an Area Welded by a High Power Density Beam and Exhibiting an Excellent Toughness in a Molten Area, Method for Producing Said Object

Country Status (7)

Country Link
US (1) US20080302450A1 (fr)
EP (1) EP1778886A1 (fr)
CN (1) CN1989268A (fr)
BR (1) BRPI0512996A (fr)
CA (1) CA2572869A1 (fr)
FR (1) FR2872442B1 (fr)
WO (1) WO2006013242A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014009387A (ja) * 2012-06-29 2014-01-20 Kobe Steel Ltd 母材靭性およびｈａｚ靱性に優れた高張力鋼板
CN106319385A (zh) * 2016-09-30 2017-01-11 无锡市明盛强力风机有限公司 一种金属材料及其制备方法
WO2019171624A1 (fr) * 2018-03-09 2019-09-12 日新製鋼株式会社 Tuyau d'acier et procédé de fabrication de tuyau d'acier
US10471544B2 (en) 2014-05-09 2019-11-12 Autotech Engineering A.I.E. Methods for joining two blanks
US10961603B2 (en) 2013-11-25 2021-03-30 Magna International Inc. Structural component including a tempered transition zone

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5365216B2 (ja) * 2008-01-31 2013-12-11 Ｊｆｅスチール株式会社 高強度鋼板とその製造方法
CN104759625B (zh) * 2015-03-27 2017-01-04 桂林电子科技大学 一种使用激光3d打印技术制备铝合金结构件的材料及方法
CN105296852B (zh) * 2015-11-24 2017-03-29 西安三维应力工程技术有限公司 汽车传动轴用焊接钢管及其制造方法
US10252378B2 (en) * 2015-12-10 2019-04-09 Caterpillar Inc. Hybrid laser cladding composition and component therefrom

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527040A (en) * 1983-06-16 1985-07-02 The United States Of America As Represented By The Secretary Of The Navy Method of laser welding
US6085528A (en) * 1997-06-20 2000-07-11 Exxonmobil Upstream Research Company System for processing, storing, and transporting liquefied natural gas
US6532995B1 (en) * 1999-01-07 2003-03-18 Nippon Steel Corporation Super-high-strength line pipe excellent in low temperature toughness and production method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993024269A1 (fr) * 1992-05-27 1993-12-09 Alloy Rods Global, Inc. Electrodes pour le soudage produisant des depots de soudage de ferrite bainitique a faible teneur en carbone
JPH1094890A (ja) * 1996-09-24 1998-04-14 Nippon Steel Corp 溶接部継手靭性に優れた鋼板のレーザー溶接方法
FI114484B (fi) * 2002-06-19 2004-10-29 Rautaruukki Oyj Kuumavalssattu nauhateräs ja sen valmistusmenetelmä

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527040A (en) * 1983-06-16 1985-07-02 The United States Of America As Represented By The Secretary Of The Navy Method of laser welding
US6085528A (en) * 1997-06-20 2000-07-11 Exxonmobil Upstream Research Company System for processing, storing, and transporting liquefied natural gas
US6532995B1 (en) * 1999-01-07 2003-03-18 Nippon Steel Corporation Super-high-strength line pipe excellent in low temperature toughness and production method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014009387A (ja) * 2012-06-29 2014-01-20 Kobe Steel Ltd 母材靭性およびｈａｚ靱性に優れた高張力鋼板
US10961603B2 (en) 2013-11-25 2021-03-30 Magna International Inc. Structural component including a tempered transition zone
US10471544B2 (en) 2014-05-09 2019-11-12 Autotech Engineering A.I.E. Methods for joining two blanks
CN106319385A (zh) * 2016-09-30 2017-01-11 无锡市明盛强力风机有限公司 一种金属材料及其制备方法
WO2019171624A1 (fr) * 2018-03-09 2019-09-12 日新製鋼株式会社 Tuyau d'acier et procédé de fabrication de tuyau d'acier

Also Published As

Publication number Publication date
CN1989268A (zh) 2007-06-27
FR2872442A1 (fr) 2006-01-06
CA2572869A1 (fr) 2006-02-09
BRPI0512996A (pt) 2008-04-22
FR2872442B1 (fr) 2006-09-15
WO2006013242A9 (fr) 2007-06-14
WO2006013242A1 (fr) 2006-02-09
EP1778886A1 (fr) 2007-05-02

Similar Documents

Publication Publication Date Title
CA2867798C (fr) Plaque d'acier a haute resistance, a faible rapport d'elasticite, ayant une resistance superieure au vieillissement apres deformation, son procede de fabrication et tuyau en aciersoude a haute resistance utilisant cette plaque
EP2876180B1 (fr) PLAQUE D'ACIER AYANT UNE LIMITE D'ÉLASTICITÉ DE 670-870 N/mm² ET UNE RÉSISTANCE À LA TRACTION DE 780-940 N/mm²
EP2894235B1 (fr) Acier à paroi épaisse, à résistance à la traction élevée, ayant d'excellentes caractéristiques ctod de la zone affectée par la chaleur de soudage et son procédé de fabrication
AU2012378562B2 (en) Pearlite rail, flash butt welding method for pearlite rail, and method for manufacturing pearlite rail
Wang et al. Microstructure and tensile properties of the laser welded TWIP steel and the deformation behavior of the fusion zone
Maurer et al. Electron beam welding of atmcp steel with 700 Mpa yield strength
EP3862456A1 (fr) Tôle d'acier inoxydable austénitique plaquée, tôle d'acier de base et procédé de production de tôle d'acier plaquée
JP6725020B2 (ja) バルブプレートおよびバルブプレートの製造方法
KR102355570B1 (ko) 고 Mn 강 및 그 제조 방법
US20150361664A1 (en) H-section steel and method of producing the same
KR20250150088A (ko) 강재
US20080302450A1 (en) Object Comprising a Steel Part of Metal Construction Consisting of an Area Welded by a High Power Density Beam and Exhibiting an Excellent Toughness in a Molten Area, Method for Producing Said Object
CN110546295A (zh) 轧制h型钢及其制造方法
JP7272438B2 (ja) 鋼材およびその製造方法、ならびにタンク
JP7469734B1 (ja) 鋼板
Hemmilä et al. Mechanical and technological properties of ultra high strength Optim steels
Lee et al. Effect of post-weld heat treatments on microstructure and mechanical properties of electron beam welded flow formed maraging steel weldment
KR101764083B1 (ko) 선박용 단강품
JP2024119331A (ja) 鋼板及び鋼板の製造方法
WO2018088214A1 (fr) Acier à haute résistance
EP2644730B1 (fr) Joint soudé par faisceau d'électrons, matériau en acier pour le soudage par faisceau d'électrons et leur procédé de fabrication
KR102914363B1 (ko) 강판 및 용접 조인트
TWI719857B (zh) 鋼材及其製造方法以及槽
WO2025154726A1 (fr) Tôle d'acier, et réceptacle pour co2 liquéfié
Li et al. Effects of Laser Premelting Treatment on Microstructure and Mechanical Properties of High-Strength Steel Weld Obtained by Laser-MAG Hybrid Welding

Legal Events

Date Code Title Description
AS Assignment

Owner name: ARCELOR FRANCE, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KAPLAN, DOMINIQUE;REEL/FRAME:021549/0277

Effective date: 20070108

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION