EP0394754A3 - Process and device for the selective heat treatment of the weld seam region of a longitudinally welded pipe - Google Patents

Process and device for the selective heat treatment of the weld seam region of a longitudinally welded pipe Download PDF

Info

Publication number
EP0394754A3
EP0394754A3 EP19900106913 EP90106913A EP0394754A3 EP 0394754 A3 EP0394754 A3 EP 0394754A3 EP 19900106913 EP19900106913 EP 19900106913 EP 90106913 A EP90106913 A EP 90106913A EP 0394754 A3 EP0394754 A3 EP 0394754A3
Authority
EP
European Patent Office
Prior art keywords
weld
heat treatment
protective gas
less
longitudinally welded
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.)
Granted
Application number
EP19900106913
Other languages
German (de)
French (fr)
Other versions
EP0394754A2 (en
EP0394754B1 (en
Inventor
Friedhelm Schmitz
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.)
Siemens AG
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
Publication of EP0394754A2 publication Critical patent/EP0394754A2/en
Publication of EP0394754A3 publication Critical patent/EP0394754A3/en
Application granted granted Critical
Publication of EP0394754B1 publication Critical patent/EP0394754B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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>
EP90106913A 1989-04-27 1990-04-11 Process and device for the selective heat treatment of the weld seam region of a longitudinally welded pipe Expired - Lifetime EP0394754B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913973 1989-04-27
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 (3)

Publication Number Publication Date
EP0394754A2 EP0394754A2 (en) 1990-10-31
EP0394754A3 true EP0394754A3 (en) 1992-10-14
EP0394754B1 EP0394754B1 (en) 1994-08-17

Family

ID=6379624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106913A Expired - Lifetime EP0394754B1 (en) 1989-04-27 1990-04-11 Process and device for the selective heat treatment of the weld seam region of a longitudinally 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
US20110198820A1 (en) * 2010-02-16 2011-08-18 Benteler Automobiltechnik Gmbh Stabilizer and a method for producing a stabilizer
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
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

Citations (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
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
DE2264071A1 (en) * 1971-12-30 1973-09-06 Rotterdamsche Droogdok Mij PROCEDURE FOR THE RECRISTALLIZATION OF A BASE MATERIAL UNDER A COATING LAYER
DE1558004C2 (en) * 1967-06-14 1974-07-11 Mannesmannroehren-Werke As, 4000 Duesseldorf Process for the heat treatment of weld seams
EP0234200A1 (en) * 1986-01-21 1987-09-02 Siemens Aktiengesellschaft Process and device for the heat treatment of longitudinally welded pipes
EP0322758A1 (en) * 1987-12-24 1989-07-05 Schoeller Werk GmbH &amp; Co KG Process and device for the heat-treatment of the welding joints of longitudinally welded metal tubes

Patent Citations (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
DE2264071A1 (en) * 1971-12-30 1973-09-06 Rotterdamsche Droogdok Mij PROCEDURE FOR THE RECRISTALLIZATION OF A BASE MATERIAL UNDER A COATING LAYER
EP0234200A1 (en) * 1986-01-21 1987-09-02 Siemens Aktiengesellschaft Process and device for the heat treatment of longitudinally welded pipes
EP0322758A1 (en) * 1987-12-24 1989-07-05 Schoeller Werk GmbH &amp; Co KG Process and device for the heat-treatment of the welding joints of longitudinally welded metal tubes

Also Published As

Publication number Publication date
EP0394754A2 (en) 1990-10-31
ATE110116T1 (en) 1994-09-15
DE3913973A1 (en) 1990-10-31
ES2057241T3 (en) 1994-10-16
DE59006808D1 (en) 1994-09-22
EP0394754B1 (en) 1994-08-17

Similar Documents

Publication Publication Date Title
DE3065242D1 (en) Method for joining together thermoplastics pipes and pipe fittings
JP2668870B2 (en) Heat treatment method and equipment for vertical seam welded pipe
ES8608367A1 (en) Method and apparatus for welding thin metal sheets.
US3839126A (en) Plastic welding apparatus
US2542393A (en) Apparatus for welding
US3101404A (en) Welding method employing ultrasonic energy
DK526988D0 (en) METHOD AND APPARATUS FOR FLADWARE COMPOSITION OF THE END OF PIPE-THERMOPLASTIC PARTS
EP0394754A3 (en) Process and device for the selective heat treatment of the weld seam region of a longitudinally welded pipe
JPH03504695A (en) A method of press-welding heated members using an arc moving in a magnetic field
US3612817A (en) Vertical gap arc welding
JPS6466078A (en) Heat treatment of weld joint part excellent in strength and stiffness
Steklov et al. Plasma-Arc Welding of High Silicon Corrosion Resistant 02 Kh 8 N 22 S 6 Steel
SU1454599A1 (en) Method of multiple-pass welding of parts
SU712259A1 (en) Method of resistance welding of thermoplastic tubes
JPH07276502A (en) Weld-joining method of thermoplastic member
JPH1069969A (en) Work coil for induction heating and induction heating method
SU1038146A1 (en) Fusion welding method
SU626905A1 (en) Method of twin-arc welding of t-joint corner welds
SU1009664A1 (en) Method of automatic control of electric arc welding process
SU1486288A1 (en) Apparatus for welding with arc rotating in magnetic field
GB1191187A (en) Improvements relating to Automatic Electric Welding
Morgan The Weldability of Steels and Its Relationships to Mechanical Properties. II
SU1570870A1 (en) Method of joining cladded materials
Hanova Manual Arc Welding of 17 501 Steel
Maciel et al. Obtaining continuous cooling curves in welded joints using a direct method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19901205

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 19931026

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 110116

Country of ref document: AT

Date of ref document: 19940915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59006808

Country of ref document: DE

Date of ref document: 19940922

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2057241

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19941014

ET Fr: translation filed
EAL Se: european patent in force in sweden

Ref document number: 90106913.8

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19950718

Year of fee payment: 6

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960322

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19960327

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19960409

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960410

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960422

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960430

Ref country code: CH

Effective date: 19960430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960430

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960620

Year of fee payment: 7

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19970411

Ref country code: AT

Effective date: 19970411

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970412

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970412

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19971101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970411

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19971101

EUG Se: european patent has lapsed

Ref document number: 90106913.8

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990405

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050411