ATE110116T1 - METHOD AND DEVICE FOR THE SELECTIVE HEAT TREATMENT OF THE WELD AREA OF A LONG SEAM WELDED PIPE. - Google Patents

METHOD AND DEVICE FOR THE SELECTIVE HEAT TREATMENT OF THE WELD AREA OF A LONG SEAM WELDED PIPE.

Info

Publication number
ATE110116T1
ATE110116T1 AT90106913T AT90106913T ATE110116T1 AT E110116 T1 ATE110116 T1 AT E110116T1 AT 90106913 T AT90106913 T AT 90106913T AT 90106913 T AT90106913 T AT 90106913T AT E110116 T1 ATE110116 T1 AT E110116T1
Authority
AT
Austria
Prior art keywords
weld
heat treatment
protective gas
less
annealing
Prior art date
Application number
AT90106913T
Other languages
German (de)
Inventor
Friedhelm Schmitz
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of ATE110116T1 publication Critical patent/ATE110116T1/en

Links

Classifications

    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The present invention relates to a process for selective solution-annealing of the weld zone (2, 3) of a longitudinally welded metal pipe (1). The process is especially suitable for pipes (1) having a diameter of less than 100 mm and a wall thickness of less than 2.5 mm, preferably less than 0.7 mm. In the course of the heat treatment, the weld (2) is first heated under a protective gas (1) to such an extent that its outer region (2.1) is fused. This can preferably be effected by an electric arc (7). Subsequently, the weld (2) is selectively held by further heating means (8), for example further arcs, infrared emitters or induction coils, for a presettable period under a protective gas (I) at least at a temperature (Tmin) required for the solution-annealing of the pipe material, but below the melting temperature (Ts) at least in the inner region (2.2) of the weld (2), and then cooled (10) under a protective gas (I). The single or multiple incipient fusion of the outer region (2.1) of the weld (2) does not reduce the quality of the heat treatment in the inner region (2.2), so that the desired corrosion resistance in the latter does not suffer. However, the partial fusion facilitates rapid introduction of heat for heating up the weld. <IMAGE>
AT90106913T 1989-04-27 1990-04-11 METHOD AND DEVICE FOR THE SELECTIVE HEAT TREATMENT OF THE WELD AREA OF A LONG SEAM WELDED PIPE. ATE110116T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3913973A DE3913973A1 (en) 1989-04-27 1989-04-27 METHOD AND DEVICE FOR THE SELECTIVE HEAT TREATMENT OF THE WELDING AREA OF A LONELY WELDED TUBE

Publications (1)

Publication Number Publication Date
ATE110116T1 true ATE110116T1 (en) 1994-09-15

Family

ID=6379624

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90106913T ATE110116T1 (en) 1989-04-27 1990-04-11 METHOD AND DEVICE FOR THE SELECTIVE HEAT TREATMENT OF THE WELD AREA OF A LONG SEAM WELDED PIPE.

Country Status (4)

Country Link
EP (1) EP0394754B1 (en)
AT (1) ATE110116T1 (en)
DE (2) DE3913973A1 (en)
ES (1) ES2057241T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008060205A1 (en) * 2008-12-04 2010-06-10 Rolls-Royce Deutschland Ltd & Co Kg Method for producing a welded rotor for a gas turbine engine
DE102010044799A1 (en) * 2010-09-09 2012-04-26 Benteler Automobiltechnik Gmbh Multipart stabilizer, has two stabilizer components material-conclusively coupled with each other by thermal joining and circulating joining seam, and stabilizer profile manufactured as tubing profile and/or profile made of full material
US20110198820A1 (en) * 2010-02-16 2011-08-18 Benteler Automobiltechnik Gmbh Stabilizer and a method for producing a stabilizer
CN116689963B (en) * 2023-06-25 2023-12-01 浙江摩多巴克斯科技股份有限公司 Laser welding process for high-strength steel pipe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673276A (en) * 1951-02-01 1954-03-23 Babcock & Wilcox Co Post heating of electrically welded tubes in line of production
DE1558004C2 (en) * 1967-06-14 1974-07-11 Mannesmannroehren-Werke As, 4000 Duesseldorf Process for the heat treatment of weld seams
AT297449B (en) * 1970-07-14 1972-03-27 Simmering Graz Pauker Ag Process for the production of weld seams in a protective gas atmosphere with a preferably non-melting electrode
BE793529A (en) * 1971-12-30 1973-06-29 Rotterdamsche Droogdok Mij N V METHOD FOR RECYSTALLIZING A BASE MATERIAL LOCATED UNDER A WELDED LAYER
DE3766507D1 (en) * 1986-01-21 1991-01-17 Siemens Ag METHOD AND DEVICES FOR THE HEAT TREATMENT OF ROD WELDED TUBES.
DE3744044A1 (en) * 1987-12-24 1989-07-06 Schoeller Gmbh & Co Kg METHOD FOR THE HEAT TREATMENT OF THE WELDING SEAM ON LONG-WELDED METAL TUBES AND DEVICE FOR CARRYING OUT THE METHOD

Also Published As

Publication number Publication date
DE3913973A1 (en) 1990-10-31
EP0394754A3 (en) 1992-10-14
DE59006808D1 (en) 1994-09-22
EP0394754A2 (en) 1990-10-31
ES2057241T3 (en) 1994-10-16
EP0394754B1 (en) 1994-08-17

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Legal Events

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