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1. (WO2019002924) METHOD FOR WELDING USING POINTS OF MARTENSITIC STAINLESS STEEL SHEETS
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2019/002924 International Application No.: PCT/IB2017/053975
Publication Date: 03.01.2019 International Filing Date: 30.06.2017
IPC:
C22C 38/04 (2006.01) ,B23K 11/00 (2006.01) ,B23K 11/10 (2006.01) ,B23K 11/11 (2006.01) ,B23K 11/30 (2006.01) ,C22C 38/18 (2006.01) ,C22C 38/26 (2006.01) ,C22C 38/40 (2006.01) ,C22C 38/48 (2006.01) ,C22C 38/58 (2006.01) ,B23K 11/16 (2006.01) ,B23K 101/18 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
04
containing manganese
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
11
Resistance welding; Severing by resistance heating
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
11
Resistance welding; Severing by resistance heating
10
Spot welding; Stitch welding
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
11
Resistance welding; Severing by resistance heating
10
Spot welding; Stitch welding
11
Spot welding
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
11
Resistance welding; Severing by resistance heating
30
Features relating to electrodes
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
26
with niobium or tantalum
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
48
with niobium or tantalum
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
40
with nickel
58
with more than 1.5% by weight of manganese
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
11
Resistance welding; Severing by resistance heating
16
taking account of the properties of the material to be welded
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
101
Articles made by soldering, welding or cutting
18
Sheet panels
Applicants:
APERAM [LU/LU]; 12C, rue Guillaume Kroll 1882 Luxembourg, LU
Inventors:
PETIT, Bertrand; FR
BRIDAULT, Frédéric; FR
Agent:
BLOT, Philippe; FR
COLOMBIE, Damien; FR
DOMENEGO, Bertrand; FR
HABASQUE, Etienne; FR
HOLTZ, Béatrice; FR
NEYRET, Daniel; FR
Priority Data:
Title (EN) METHOD FOR WELDING USING POINTS OF MARTENSITIC STAINLESS STEEL SHEETS
(FR) PROCÉDÉ DE SOUDAGE PAR POINTS DE TÔLES D'ACIER INOXYDABLE MARTENSITIQUE
Abstract:
(EN) Method for welding two 0.10 to 6.0 mm thick steel sheets having the following composition: 0.005 % ≤ C ≤ 0.3 %; 0.2 % ≤ Mn ≤ 2.0 %; traces ≤ Si ≤ 1.0 %; traces ≤ S ≤ 0.01 %; traces ≤ P ≤ 0.04 %; 10.5 % ≤ Cr ≤ 17.0 %; traces ≤ Ni ≤ 4.0 %; traces ≤ Mo ≤ 2.0 %; Mo + 2 x W ≤ 2.0 %; traces ≤ Cu ≤ 3 %; traces ≤ Ti ≤ 0.5 %; traces ≤ Al ≤ 0.2 %; traces ≤ O ≤ 0.04 %; 0.05 % ≤ Nb ≤ 1.0 %; 0.05 % ≤ Nb + Ta ≤ 1.0 %; 0.25 % ≤ (Nb + Ta)/(C + N) ≤ 8; traces ≤ V ≤ 0.3 %; traces ≤ Co ≤ 0.5 %; traces ≤ Cu + Ni + Co ≤ 5.0 %; traces ≤ Sn ≤ 0.05 %; traces ≤ B ≤ 0.1 %; traces ≤ Zr ≤ 0.5 %; Ti + V + Zr ≤ 0.5 %; traces ≤ H ≤ 5 ppm; traces ≤ N ≤ 0.2 %; (Mn + Ni) ≥ (Cr -10.3 - 80 x [(C + N)2]); traces ≤ Ca ≤ 0.002 %; traces ≤ rare earths and/or Y ≤ 0.06 %; the remainder being iron and impurities resulting from the production process; the temperature (Ms) of the sheet being ≥ 200 °C; the temperature (Mf) of the sheet being ≥ -50 °C; the microstructure of the sheet containing at most 0.5 % of carbides and at most 20 % of residual ferrite, the remainder being martensite; characterised in that it comprises the following steps, with (e) being the thickness of each of said sheets or of the thinnest one of said sheets: a first welding step, with a duration (t) in ms: for thicknesses (e) of 0.10 to 0.50 mm, t = (40 x e + 36) ± 10 %; for thicknesses (e) of 0.51 to 1.50 mm: t = (124 x e - 13) ± 10 %; for thicknesses (e) of 1.51 to 6.0 mm: t = (12 x e + 47) ± 10 %; and with a clamping force (F) in daN: for thicknesses (e) of 0.10 to 1.50 mm: F = (250 x e + 90) ± 10 %; for thicknesses (e) of 1.51 mm to 6.0 mm: F = (180 x e + 150) ± 10 %, during which step a current is applied between the welding electrodes, the intensity of said current being between 80 and 100 % of the maximum authorised intensity corresponding to the expulsion of melted metal; a second step with the intensity being between zero and 1 kA; and a third step with the intensity being from 3.5 kA to 4.5 kA, over a duration of at least 755 ms.
(FR) Procédé de soudage de deux tôles d'acier d'épaisseur 0,10 à 6,0 mm et de composition : 0,005%≤ C ≤ 0,3%; 0,2% ≤ Mn ≤ 2,0%; traces ≤ Si ≤ 1,0%; traces ≤ S ≤ 0,01 %; traces ≤ P ≤ 0,04%; 10,5% ≤ Cr ≤ 17,0%; traces ≤ Ni ≤ 4,0%; traces ≤ Mo ≤ 2,0%; Mo + 2 x W ≤ 2,0%; traces ≤ Cu ≤ 3%; traces ≤ Ti ≤ 0,5%; traces ≤ Al ≤ 0,2%; traces ≤ O ≤ 0,04%; 0,05% ≤ Nb ≤ 1,0%; 0,05% ≤ Nb + Ta ≤ 1,0%; 0,25% ≤ (Nb + Ta)/(C + N) ≤ 8; traces ≤ V ≤ 0,3%; traces ≤ Co ≤ 0,5%; traces ≤ Cu + Ni + Co ≤ 5,0%; traces ≤ Sn ≤ 0,05%; traces ≤ B ≤ 0,1 %; traces ≤ Zr ≤ 0,5%; Ti + V + Zr ≤ 0,5%; traces ≤ H ≤ 5 ppm; traces ≤ N ≤ 0,2%; (Mn + Ni) ≥ (Cr -10,3 - 80 x [(C + N)2]); traces ≤ Ca ≤ 0,002%; traces ≤ terres rares et/ou Y ≤ 0,06%; le reste étant du fer et des impuretés résultant de l'élaboration; la température (Ms) de la tôle étant ≥ 200°C; la température (Mf) de la tôle étant ≥ -50°C; la microstructure de la tôle contenant au maximum 0,5% de carbures et au maximum 20% de ferrite résiduelle, le reste étant de la martensite; caractérisé en ce qu'il comporte les étapes suivantes, (e) étant l'épaisseur de chacune desdites tôles ou de la plus fine d'entre elles : une première étape de soudage, de durée (t) en ms : pour les épaisseurs (e) de 0,10 à 0,50 mm, t = (40 x e + 36) ± 10%; pour les épaisseurs (e) de 0,51 à 1,50 mm : t = (124 x e - 13) ± 10%; pour les épaisseurs (e) de 1,51 à 6,0 mm : t = (12 x e + 47) ± 10%;et de force de serrage (F) en daN : pour les épaisseurs (e) de 0,10 à 1,50 mm : F = (250 x e + 90) ± 10%; pour les épaisseurs (e) de 1,51 mm à 6,0 mm : F= (180 x e + 150) ± 10% pendant laquelle on applique entre les électrodes de soudage un courant d'une intensité comprise entre 80 et 100% de l'intensité maximale autorisée correspondant à l'expulsion de métal fondu; une deuxième étape avec l'intensité entre zéro et 1 kA; et une troisième étape avec l' intensité de 3,5 kA à 4,5 kA, pendant une durée d'au moins 755 ms.
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Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
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Publication Language: French (FR)
Filing Language: French (FR)