FR2565998A1 - Process for fusion welding with addition of metal to the arc under inert gas of ferritic stainless steel - Google Patents

Process for fusion welding with addition of metal to the arc under inert gas of ferritic stainless steel Download PDF

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Publication number
FR2565998A1
FR2565998A1 FR8409322A FR8409322A FR2565998A1 FR 2565998 A1 FR2565998 A1 FR 2565998A1 FR 8409322 A FR8409322 A FR 8409322A FR 8409322 A FR8409322 A FR 8409322A FR 2565998 A1 FR2565998 A1 FR 2565998A1
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France
Prior art keywords
stainless steel
ferritic stainless
metal
less
inert gas
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Granted
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FR8409322A
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French (fr)
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FR2565998B1 (en
Inventor
Marc Franzolini
Edmond Maria
Alain Vanderschaeghe
Jean Bezier
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Stein Industrie SA
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Stein Industrie SA
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Priority to FR8409322A priority Critical patent/FR2565998B1/en
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Publication of FR2565998B1 publication Critical patent/FR2565998B1/en
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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
    • 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 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent

Abstract

Fusion welding process with addition of metal to the arc under inert gas of components made of ferritic stainless steel stabilised with limited carbon and 17 to 30 % by weight of chromium. An addition metal is employed made of ferritic stainless steel stabilised with limited carbon and with weight contents of 17 to 18.5 % of chromium, 2 to 2.5 % of molybdenum and 0.4 to 0.6 % of titanium.

Description

Procédé de soudage par fusion avec apport de métal à l'arc sous gaz inerte d'acier inoxydable ferritique
La présente invention concerne un procédé de soudage par fusion avec apport de métal à l'arc sous gaz inerte de pièces en acier inoxydable ferritique stabilisé à carbone limité et 17% à 30% en poids de chrome.Process of fusion welding with addition of metal to the arc under inert gas of ferritic stainless steel
The present invention relates to a fusion welding process with the addition of metal to the arc under inert gas of ferritic stainless steel parts stabilized with limited carbon and 17% to 30% by weight of chromium.

L'on peut avoir lors de fabrication de pièces ou appareils en acier inoxydable ferritique à souder des joints répondant à des critères de caractéristiques mécaniques et de tenue à la corrosion. Si l'on utilise comme métal d'apport pour la soudure un acier inoxydable austénitique, la soudure obtenue risque d'être sensible à la corrosion intergranulaire et à la corrosion sous tension. During the manufacture of ferritic stainless steel parts or apparatus, it is possible to weld joints that meet the criteria of mechanical characteristics and resistance to corrosion. If an austenitic stainless steel is used as the filler metal for welding, the weld obtained may be sensitive to intergranular corrosion and to corrosion under stress.

L'invention a pour but de procurer un joint soudé sur pièces en acier inoxydable ferritique qui soit exempt de risques de corrosion intergranulaire et de corrosion sous tension et assure ainsi une longue durée de fonctionnement sans nécessiter d'arrêt pour réparation de soudures. The object of the invention is to provide a welded joint on ferritic stainless steel parts which is free of risks of intergranular corrosion and of corrosion under tension and thus ensures a long operating life without requiring a stop for repairing welds.

Le procédé selon l'invention est caractérisé en ce que l'on utilise un fil d'apport en acier inoxydable ferritique stabilisé à carbone limité et à teneurs en poids de 17 à 18,5% de chrome, 2% à 2,5% de molybdène et 0,4 à 0,6% de titane. The method according to the invention is characterized in that a filler wire of ferritic stainless steel stabilized with limited carbon and with contents by weight of 17 to 18.5% of chromium, 2% to 2.5% is used. molybdenum and 0.4 to 0.6% titanium.

De préférence, l'acier inoxydable ferritique du métal d'apport est à moins de 0,03% de carbone, moins de 0,5% de silicium, moins de 0,4% de manganèse, moins de 0,025% de phosphore, et moins de 0,01% de soufre. Preferably, the ferritic stainless steel of the filler metal is less than 0.03% carbon, less than 0.5% silicon, less than 0.4% manganese, less than 0.025% phosphorus, and less than 0.01% sulfur.

Il est décrit ci-après, à titre d'exemple, les compositions précises d'un acier inoxydable ferritique pour faisceaux de tubes d'échange de chaleur dits "en épingle" et du métal d'apport utilisé pour leur soudage bout à bout. The following describes, by way of example, the precise compositions of a ferritic stainless steel for bundles of so-called "pin" heat exchange tubes and the filler metal used for their butt welding.

Les tubes d'échange de chaleur sont en acier inoxydable ferritique de la nuance Z2 CT 18 (17 à 18,5% de chrome, moins de 0,03% de carbone, moins de 0,5% de silicium, moins de 1% de manganèse, moins de 0,03% de phosphore, moins de 0,01% de soufre, moins de 0,50% de nickel, au plus 0,1% de molybdène, moins de 0,1% de cuivre, moins de 0,05% d'aluminium, au plus 0,02% d'azote, avec une teneur en titane égale à 15 fois la somme carbone + azote, ce produit étant toutefois inférieur à 0,75%, et la somme azote + carbone inférieure ou égale à 0,04%).  The heat exchange tubes are made of ferritic stainless steel of grade Z2 CT 18 (17 to 18.5% of chromium, less than 0.03% of carbon, less than 0.5% of silicon, less than 1% manganese, less than 0.03% phosphorus, less than 0.01% sulfur, less than 0.50% nickel, at most 0.1% molybdenum, less than 0.1% copper, less than 0.05% aluminum, at most 0.02% nitrogen, with a titanium content equal to 15 times the sum carbon + nitrogen, this product being however less than 0.75%, and the sum nitrogen + carbon less than or equal to 0.04%).

Le métal d'apport est un acier inoxydable ferritique au molybdène-titane en fil de soudage de nuance voisine de celle des matériaux de base (commercialisé par la Société UDDEHOLM) de composition chimique 0,017% de carbone, 0,41% de silicium, 0,31% de manganèse, 0,019% de phosphore, 0,007% de soufre, 18,4% de chrome, 2,11% de molybdène, 0,48% de titane et 0,011% d'azote.  The filler metal is a ferritic molybdenum-titanium stainless steel in a welding wire of a grade close to that of the base materials (marketed by the company UDDEHOLM) with a chemical composition of 0.017% carbon, 0.41% silicon, 0 , 31% manganese, 0.019% phosphorus, 0.007% sulfur, 18.4% chromium, 2.11% molybdenum, 0.48% titanium and 0.011% nitrogen.

Claims (2)

REVENDICATIONS 1/ Procédé de soudage par fusion avec apport de métal à l'arc sous gaz inerte de pièces en acier inoxydable ferritique stabilisé à carbone limité et 17 à 30% en poids de chrome, caractérisé en ce que l'on utilise un métal d'apport en acier inoxydable ferritique stabilisé à carbone limité et à teneurs en poids de 17% à- 18,5% de chrome, 2 à 2,5% de molybdène et 0,4 à 0,6% de titane.1 / Fusion welding process with supply of metal to the arc under inert gas of ferritic stainless steel parts stabilized with limited carbon and 17 to 30% by weight of chromium, characterized in that a metal of supply of ferritic stainless steel stabilized with limited carbon and with weight contents of 17% to- 18.5% of chromium, 2 to 2.5% of molybdenum and 0.4 to 0.6% of titanium. 2/ Procédé selon la revendication 1, caractérisé en ce que l'acier inoxydable ferritique du métal d'apport est à moins de 0,03% de carbone, moins de 0,5% de silicium, moins de 0,4% de manganèse, moins de 0,025% de phosphore et moins de 0,01% de soufre. 2 / A method according to claim 1, characterized in that the ferritic stainless steel of the filler metal is less than 0.03% carbon, less than 0.5% silicon, less than 0.4% manganese , less than 0.025% phosphorus and less than 0.01% sulfur.
FR8409322A 1984-06-14 1984-06-14 METHOD OF MELT WELDING WITH METAL ARC SUPPLY GAS INERTA OF FERRITIC STAINLESS STEEL Expired - Fee Related FR2565998B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8409322A FR2565998B1 (en) 1984-06-14 1984-06-14 METHOD OF MELT WELDING WITH METAL ARC SUPPLY GAS INERTA OF FERRITIC STAINLESS STEEL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8409322A FR2565998B1 (en) 1984-06-14 1984-06-14 METHOD OF MELT WELDING WITH METAL ARC SUPPLY GAS INERTA OF FERRITIC STAINLESS STEEL

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FR2565998A1 true FR2565998A1 (en) 1985-12-20
FR2565998B1 FR2565998B1 (en) 1993-01-08

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2180117A1 (en) * 1972-04-14 1973-11-23 Nyby Bruk Ab
FR2263309A1 (en) * 1974-03-07 1975-10-03 Allegheny Ludlum Ind Inc
JPS53144438A (en) * 1977-05-21 1978-12-15 Nippon Steel Corp Inert gas arc welding wire made of high corrosion resisting chromium stainless steel
EP0008228A2 (en) * 1978-08-14 1980-02-20 The Garrett Corporation Internally nitrided ferritic stainless steels, and methods of producing such steels
JPS57142786A (en) * 1981-03-02 1982-09-03 Nippon Steel Corp Wire for inert gas arc welding of high corrosion resistant chromium type stainless steel
US4408709A (en) * 1981-03-16 1983-10-11 General Electric Company Method of making titanium-stabilized ferritic stainless steel for preheater and reheater equipment applications

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2180117A1 (en) * 1972-04-14 1973-11-23 Nyby Bruk Ab
FR2263309A1 (en) * 1974-03-07 1975-10-03 Allegheny Ludlum Ind Inc
JPS53144438A (en) * 1977-05-21 1978-12-15 Nippon Steel Corp Inert gas arc welding wire made of high corrosion resisting chromium stainless steel
EP0008228A2 (en) * 1978-08-14 1980-02-20 The Garrett Corporation Internally nitrided ferritic stainless steels, and methods of producing such steels
JPS57142786A (en) * 1981-03-02 1982-09-03 Nippon Steel Corp Wire for inert gas arc welding of high corrosion resistant chromium type stainless steel
US4408709A (en) * 1981-03-16 1983-10-11 General Electric Company Method of making titanium-stabilized ferritic stainless steel for preheater and reheater equipment applications

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 3, no. 19 (C-37), 17 février 1979, page 93 C37; & JP - A - 53 144 438 (SHIN NIPPON SEITETSU K.K.) 15-12-1978 *
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 246 (M-176)(1124), 4 décembre 1982; & JP - A - 57 142 786 (SHIN NIPPON SEITETSKU K.K.) 03-09-1982 *
WELDING JOURNAL, vol. 55, no. 2, février 1976, pages 33-s - 41-s, Miami, Florida, US; J.M. SAWHILL et al.: "Ductility and toughness of stainless steel welds" *

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