EP0610135B1 - Wärmenachbehandlungsverfahren einer Schweissverbindung zwischen zwei verschiedenen legierten Stahlgegenständen - Google Patents

Wärmenachbehandlungsverfahren einer Schweissverbindung zwischen zwei verschiedenen legierten Stahlgegenständen Download PDF

Info

Publication number
EP0610135B1
EP0610135B1 EP94400217A EP94400217A EP0610135B1 EP 0610135 B1 EP0610135 B1 EP 0610135B1 EP 94400217 A EP94400217 A EP 94400217A EP 94400217 A EP94400217 A EP 94400217A EP 0610135 B1 EP0610135 B1 EP 0610135B1
Authority
EP
European Patent Office
Prior art keywords
temperature
treatment
heat treatment
cycle
steel
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.)
Expired - Lifetime
Application number
EP94400217A
Other languages
English (en)
French (fr)
Other versions
EP0610135A1 (de
Inventor
Alain Hassan
Jacques Comon
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.)
Alstom SA
Original Assignee
GEC Alsthom Electromecanique 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 GEC Alsthom Electromecanique SA filed Critical GEC Alsthom Electromecanique SA
Publication of EP0610135A1 publication Critical patent/EP0610135A1/de
Application granted granted Critical
Publication of EP0610135B1 publication Critical patent/EP0610135B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above
    • 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
    • C21D2251/00—Treating composite or clad material

Definitions

  • the present invention relates to a method of heat treatment after welding of two pieces in alloy steel of different grades.
  • This heat treatment generally consists of a simple tempering at a temperature slightly below the first critical temperature of transformation on heating, called AC 1 .
  • This temperature depending on the nature of the steel constituting the welded assembly, is between approximately 550 and 750 ° C. It is carefully chosen to be high enough to have the effects of stress relieving and softening, while nevertheless being limited to avoid exceeding this temperature AC 1 at the start of transformation on heating and even reaching the temperature of the metallurgical income previously undergone by the parts to be joined by welding, so as not to affect the properties of the base metal.
  • a treatment temperature a temperature intermediate between the optimal temperatures of the two steels which is therefore too high for the one whose optimal treatment temperature is the lowest or well, more often we use the temperature corresponding to that of the two steels whose temperature optimal treatment is the weakest, so in this case, the temperature is too low for the other steel.
  • the present invention thus relates to a new heat treatment process after welding of two alloy steel parts of different grades, the first part, called A, having critical transformation temperatures on heating AC 1 A and AC 3 A and a optimal treatment temperature after welding ⁇ A lower than AC 1 A, the second part, called B, having critical transformation temperatures on heating AC 1 B and AC 3 B, respectively lower than AC 1 A and AC 3 A and a temperature optimal treatment after welding ⁇ B less than AC 1 B and ⁇ A , characterized in that a first thermal treatment cycle is carried out at said temperature ⁇ A followed by a second thermal cycle at a temperature ⁇ B ,, the temperature having dropped below 100 ° C between the two cycles.
  • said first cycle of the treatment at the temperature ⁇ A exceeds the temperature AC 1 B, the whole of the treatment thus constituting, for the material B, an intercritical treatment.
  • FIGS 1 and 2 are representative diagrams of the treatment method according to the invention.
  • Figure 3 is a partial schematic view showing for example, two welded portions of a rotor turbomachine, the two welded portions each being in alloy steel of different grades, serving as a concrete example for the description of the process according to the invention.
  • FIG. 1 there is seen a diagram of the thermal treatment of the invention according to a particular embodiment (intercritical treatment). This same diagram is shown in Figure 2.
  • the heat treatment consists of two cycles: a first cycle at temperature ⁇ A and a second cycle at temperature ⁇ B.
  • the temperature ⁇ A lower than AC 1 A, is the optimal treatment temperature after welding for steel A.
  • the invention therefore consists in carrying out this double heat treatment at temperatures ⁇ A and ⁇ B after welding two pieces of alloy steel of respective grades A and B, with the temperature falling below 100 ° C. between the two treatments at temperatures ⁇ A and ⁇ B.
  • this double cycle at ⁇ A and ⁇ B has the same effect as a simple treatment at temperature ⁇ A corresponding to the optimal temperature of heat treatment after welding for this steel and the second cycle at ⁇ B has no effect.
  • a double cycle of this type, for steel B, is a so-called “intercritical” processing which is capable of generating very ductile micrographic structures.
  • At least the first thermal cycle at ⁇ A ° C is a local treatment, that is to say only affecting the deposited metal and the base metal immediately adjacent on either side.
  • the material B outside of the waiting weld is not affected by the intercritical treatment and retains its initial properties.
  • Figure 3 describes an application of the method of the invention to a turbine rotor.
  • HP-BP a rotor rotor
  • the heat treatment applied is a local treatment affecting only welded joint 1 and weld expectations 2 and 3 which have been delimited in the figure by the two dashed lines 4 and 5.
  • Part A HP in its entirety, and the metal deposited 1, will retain their characteristics after this double cycle normal mechanical.

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)
  • Arc Welding In General (AREA)

Claims (3)

  1. Verfahren zur Wärmebehandlung nach dem Verschweißen von zwei unterschiedlich legierten Stahlteilen, wobei der erste Teil, genannt A, kritische Temperaturen AC1A und AC3A für die Wärmeumwandlung und eine optimale Temperatur für die Vergütungsbehandlung nach dem Verschweißen ΘA, die unterhalb von AC1A liegt, aufweist, und der zweite Teil, genannt B, kritische Temperaturen für die Wärmeumwandlung AC1B und AC3B, die jeweils unterhalb von AC1A und AC3A liegen, und eine optimale Temperatur für die Vergütungsbehandlung nach dem Verschweißen ΘB, die unterhalb von AC1B und von ΘA liegt, aufweist,
    dadurch gekennzeichnet, daß ein erster Wärmebehandlungszyklus bei der genannten Temperatur ΘA, gefolgt von einem zweiten thermischen Zyklus bei einer Temperatur ΘB erfolgt, wobei die Temperatur zwischen den beiden Zyklen auf unterhalb von 100°C abfällt.
  2. Verfahren zur Wärmebehandlung nach Anspruch 1,
    dadurch gekennzeichnet, daß der genannte erste Wärmebehandlungszyklus bei der Temperatur ΘA die Temperatur AC1B übersteigt, wobei die gesamte Behandlung für das Material B folglich eine zwischenkritische Behandlung bildet.
  3. Verfahren nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, daß wenigstens der erste Wärmebehandlungszyklus nur auf den abesetzten Schweißzusatzwerkstoff (1) und auf die den beiden verschweißten Teilen (A, B) unmittebar benachbarten Teile (2, 3) wirkt.
EP94400217A 1993-02-05 1994-02-02 Wärmenachbehandlungsverfahren einer Schweissverbindung zwischen zwei verschiedenen legierten Stahlgegenständen Expired - Lifetime EP0610135B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9301305A FR2701272B1 (fr) 1993-02-05 1993-02-05 Procédé de traitement thermique après le soudage de deux pièces en acier allié de nuances distinctes .
FR9301305 1993-02-05

Publications (2)

Publication Number Publication Date
EP0610135A1 EP0610135A1 (de) 1994-08-10
EP0610135B1 true EP0610135B1 (de) 1999-10-20

Family

ID=9443785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94400217A Expired - Lifetime EP0610135B1 (de) 1993-02-05 1994-02-02 Wärmenachbehandlungsverfahren einer Schweissverbindung zwischen zwei verschiedenen legierten Stahlgegenständen

Country Status (4)

Country Link
US (1) US5407497A (de)
EP (1) EP0610135B1 (de)
DE (1) DE69421198T2 (de)
FR (1) FR2701272B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2126453C1 (ru) * 1998-02-02 1999-02-20 Общество с ограниченной ответственностью Научно-производственное предприятие "Валок-Чугун", Ветер Владимир Владимирович Способ термической обработки сварных соединений
GB2344549A (en) * 1998-12-02 2000-06-14 Siemens Plc Welding method for two different types of steel
US6499946B1 (en) 1999-10-21 2002-12-31 Kabushiki Kaisha Toshiba Steam turbine rotor and manufacturing method thereof
WO2004051056A1 (de) * 2002-12-05 2004-06-17 Siemens Aktiengesellschaft Turbinenwelle sowie herstellung einer turbinenwelle
EP1561827A1 (de) * 2004-02-06 2005-08-10 Alstom Technology Ltd Verfahren zum Schweissen eines ferritischen Stahls mit einer Wärmebehandlung und einer Kaltbearbeitung der Schweissung
EP1785585B1 (de) * 2005-11-09 2009-03-11 Siemens Aktiengesellschaft Verfahren zum Herstellen einer Dampfturbinenwelle
DE102010043837A1 (de) * 2010-11-12 2012-05-16 Hilti Aktiengesellschaft Schlagwerkskörper, Schlagwerk und Handwerkzeugmaschine mit einem Schlagwerk

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61174335A (ja) * 1985-01-28 1986-08-06 Nippon Steel Corp 靭性の優れた掘削用ドリルパイプの製造法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR673222A (fr) * 1928-04-02 1930-01-13 Thomson Houston Comp Francaise Perfectionnements apportés au traitement des fontes malléables
US2133926A (en) * 1936-06-13 1938-10-18 Texas Co Heat treatment of welded joints

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61174335A (ja) * 1985-01-28 1986-08-06 Nippon Steel Corp 靭性の優れた掘削用ドリルパイプの製造法

Also Published As

Publication number Publication date
DE69421198D1 (de) 1999-11-25
FR2701272B1 (fr) 1995-03-31
US5407497A (en) 1995-04-18
EP0610135A1 (de) 1994-08-10
DE69421198T2 (de) 2000-05-25
FR2701272A1 (fr) 1994-08-12

Similar Documents

Publication Publication Date Title
CA2239478C (fr) Acier inoxydable austenoferritique a tres bas nickel et presentant un fort allongement en traction
NO782392L (no) Fremgangsmaate til anbringelse av et belegg ved smeltesveising
FR2481162A1 (fr) Cylindre du type a assemblage pour service a haute temperature
FR2744733A1 (fr) Acier pour la fabrication de piece forgee et procede de fabrication d'une piece forgee
US5919577A (en) Fe-based alloy foil for liquid-phase diffusion bonding of Fe-based materials by enabling bonding in oxidizing atmospheres
FR2556714A1 (fr) Feuille de soudure pour la liaison sans tension de corps de matiere ceramique avec un metal
FR2706489A1 (fr) Acier inoxydable martensitique à usinabilité améliorée.
JPH0818151B2 (ja) Ｔｉ−Ａｌ合金と構造用鋼との接合方法および接合部品
CA2278407A1 (fr) Procede et acier pour la fabrication d'une enceinte chaudronnee travaillant en presence d'hydrogene sulfure
US5683822A (en) Liquid-phase diffusion bonding alloy foils for joining heat-resistant metals in oxidizing atmospheres
CA2164488C (fr) Procede de soudage par fusion de pieces de fonte a graphite spheroidal
EP0610135A1 (de) Wärmenachbehandlungsverfahren einer Schweissverbindung zwischen zwei verschiedenen legierten Stahlgegenständen
EP2855080A1 (de) Verfahren zum verschweissen zweier kanten von einem oder mehreren stahlteilen einschliesslich eines wärmebehandlungsschritts nach dem schweissschritt: mit solch einem verfahren hergestellte druckrohrleitung
EP0511040B1 (de) Verfahren zum Verbinden eines Stückes aus Manganstahl und eines Stückes aus Kohlenstoffstahl und hergestellte Verbindung
JP3434128B2 (ja) 酸化雰囲気中で接合可能な液相拡散接合用合金箔
BE899854A (fr) Procede pour fabriquer du tube d'acier cintre ayant une resistance mecanique et une tenacite a basse temperature excellentes.
Woollin Postweld heat treatment to avoid intergranular stress corrosion cracking of supermartensitic stainless steels
Maruyama Arc welding technology for dissimilar joints
JPS60106691A (ja) ろう付用合金
FR2471831A1 (fr) Procede de realisation d'un joint soude
FR2756298A1 (fr) Acier et procede pour la fabrication d'une piece de mecanique ayant une structure bainitique
FR2467030A1 (fr) Table bimetallique en acier pour rouleau de coulee continue et son procede de fabrication
JP3937369B2 (ja) フェライト系ステンレス鋼管の加工方法
JP4283380B2 (ja) 異種材料溶接型タービンロータ及びその製造方法
JPH10118764A (ja) ＴｉＡｌ製タービン羽根車とローターシャフトとの接合 方法

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: A1

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

17P Request for examination filed

Effective date: 19941209

17Q First examination report despatched

Effective date: 19970604

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: CABINET ROLAND NITHARDT CONSEILS EN PROPRIETE INDU

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

Effective date: 19991021

REF Corresponds to:

Ref document number: 69421198

Country of ref document: DE

Date of ref document: 19991125

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

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: SE

Payment date: 20070213

Year of fee payment: 14

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

Ref country code: IT

Payment date: 20080220

Year of fee payment: 15

EUG Se: european patent has lapsed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

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

Effective date: 20080203

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

Ref country code: CH

Payment date: 20100218

Year of fee payment: 17

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

Ref country code: FR

Payment date: 20100222

Year of fee payment: 17

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

Ref country code: GB

Payment date: 20100107

Year of fee payment: 17

Ref country code: DE

Payment date: 20100226

Year of fee payment: 17

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

Effective date: 20090202

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Effective date: 20110202

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

Ref country code: LI

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

Effective date: 20110228

Ref country code: CH

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

Effective date: 20110228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111102

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69421198

Country of ref document: DE

Effective date: 20110901

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: 20110228

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

Ref country code: GB

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

Effective date: 20110202

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: 20110901