# US 12,759,093 B2 · Method for the manufacture of an assembly by tungsten inert gas (TIG) welding > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,093 B2 - Document ID: US12759093B2 - Status: Granted - Kind: B2 - Application number: 17/603,423 - Filed: 2020-04-16 - Published: 2022-08-11 - Granted: 2026-10-13 - Earliest claimed: 2019-04-17 - Assignees: ArcelorMittal - Applicants: ArcelorMittal - Inventors: Alvaro Manjon Fernandez; Marcos Perez Rodriguez; David Noriega Perez; Christina Blanco Roldan; Roberto Suarez Sanchez; Sivasambu Bohm - Web page: https://patentgrep.com/patent/US12759093B2 ## CPC - B23K 35/3608: {Titania or titanates} - B23K 9/0026: {specially adapted for particular articles or work} - B23K 9/173: and of a consumable electrode - B23K 9/235: Preliminary treatment - B23K 35/32: with the principal constituent melting at more than 1550°C - B23K 35/383: {mainly containing noble gases or nitrogen} - C09D 1/00: Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances - C09D 5/08: Anti-corrosive paints - B23K 2101/34: Coated articles {; Surface treated articles} - B23K 2103/04: Steel {or steel} alloys - 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 - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract A pre-coated steel substrate coated with: —optionally, an anticorrosion coating and—a flux including at least one titanate and at least one nanoparticle chosen from: TiO2, SiO2, Yttria-stabilized zirconia (YSZ), Al2O3, MoO3, CrO3, CeO2 or a mixture thereof, the thickness of the flux being between 30 and 95 μm. ## Claims ### Claim 1 A pre-coated steel substrate comprising: a steel substrate; and a flux coating the steel substrate and including at least one titanate, wherein a diameter of the at least one titanate is between 1 and 40 μm, and at least one nanoparticle selected from the group consisting of: TiO2, SiO2, Yttria-stabilized zirconia (YSZ), Al2O3, MoO3, CrO3, CeO2 and mixtures thereof, a thickness of the flux being between 30 and 95 μm. ### Claim 2 (depends on 1) The pre-coated steel substrate as recited in claim 1 wherein the at least one titanate is selected from the group consisting of: Na2Ti3O7, NaTiO3, K2TiO3, K2Ti2O5, MgTiO3, SrTiO3, BaTiO3, CaTiO3, FeTiO3, ZnTiO4 and mixtures thereof. ### Claim 3 (depends on 1) The pre-coated steel substrate as recited in claim 1 wherein a percentage of the at least one nanoparticle is below or equal to 80 wt. %. ### Claim 4 (depends on 1) The pre-coated steel substrate as recited in claim 1 wherein a percentage of the at least one titanate is above or equal to 45 wt. %. ### Claim 5 (depends on 1) The pre-coated steel substrate as recited in claim 1 wherein the flux further includes a binder. ### Claim 6 (depends on 5) The pre-coated steel substrate as recited in claim 5, wherein a percentage of the binder in the pre-coating is between 1 and 20 wt. %. ### Claim 7 (depends on 1) The pre-coated steel substrate as recited in claim 1 further comprising an anti-corrosion coating. ### Claim 8 (depends on 7) The pre-coated steel substrate as recited in claim 7 wherein the anti-corrosion coating includes a metal selected from the group consisting of zinc, aluminum, copper, silicon, iron, magnesium, titanium, nickel, chromium, manganese and their alloys. ### Claim 9 (depends on 1) A method for the manufacture of the pre-coated steel substrate as recited in claim 1, comprising the successive following steps: A. providing the steel substrate; and B. depositing the flux including at least one titanate, wherein the diameter of the at least one titanate is between 1 and 40 μm. ### Claim 10 (depends on 9) The method as recited in claim 9 further comprising: C. drying of the coated steel substrate obtained in step B. ### Claim 11 (depends on 9) The method as recited in claim 9 wherein in step B, the deposition of the flux is performed by spin coating, spray coating, dip coating or brush coating. ### Claim 12 (depends on 9) The method as recited in claim 9 wherein in step B, the flux further includes an organic solvent. ### Claim 13 (depends on 9) The method as recited in claim 9 wherein in step B, the flux includes from 1 to 200 g/L of the at least one nanoparticle. ### Claim 14 (depends on 9) The method as recited in claim 9 wherein in step B, the flux includes from 100 to 500 g/L of the at least one titanate. ### Claim 15 (depends on 9) The method as recited in claim 9 wherein in step B, the flux further includes a binder precursor. ### Claim 16 A method for the manufacture of an assembly comprising the following successive steps: providing at least two metallic substrates wherein a first of the at least two metallic substrates is a pre-coated steel substrate coated with a flux including at least one titanate, wherein a diameter of the at least one titanate is between 1 and 40 μm, and at least one nanoparticle selected from the group consisting of: TiO2, SiO2, Yttria-stabilized zirconia (YSZ), Al2O3, MoO3, CrO3, CeO2 and mixtures thereof, a thickness of the flux being between 30 and 95 μm; and welding the at least two metallic substrates by TIG welding. ### Claim 17 (depends on 16) The method as recited in claim 16 wherein the TIG welding is performed with a shielding gas being an inert gas. ### Claim 18 (depends on 16) The method as recited in claim 16 wherein an electric current of a welding machine performing the TIG welding is between 10 and 300 A. ### Claim 19 (depends on 1) An assembly of at least a first metallic substrate in the form of the pre-coated steel substrate as recited in claim 1 and a second metallic substrate, the first and second metallic substrates being at least partially welded together through TIG welding, the welded zone including the flux as a dissolved or precipitated flux. ### Claim 20 (depends on 19) The assembly as recited in claim 19 wherein the second metallic substrate is a steel substrate or an aluminum substrate. ### Claim 21 (depends on 19) The assembly as recited in claim 19 wherein the second metallic substrate is a second pre-coated steel substrate having a second steel substrate; and a second flux including at least one titanate and at least one nanoparticle selected from the group consisting of: TiO2, SiO2, Yttria-stabilized zirconia (YSZ), Al2O3, MoO3, CrO3, CeO2 and mixtures thereof, a thickness of the second flux being between 30 and 95 μm.