Shielding Patents (Class 219/146.52)
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Patent number: 11904415Abstract: The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. The tubular welding wire includes less than approximately 0.4% manganese metal or alloy by weight, and the tubular welding wire is configured to form a weld deposit having less than approximately 0.5% manganese by weight.Type: GrantFiled: February 2, 2021Date of Patent: February 20, 2024Assignee: HOBART BROTHERS LLCInventors: Mario Anthony Amata, Joseph C. Bundy, Steven Edward Barhorst
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Patent number: 11534873Abstract: A self-shielded flux-cored welding wire with a special protective slag coating formed in situ and a manufacture method thereof. The self-shielded flux-cored welding wire includes a low-carbon steel belt and a flux core powder, the flux core powder is filled in the low-carbon steel belt, the flux core powder includes the following ingredients in percentage by mass: 60-80% glass powder, 2-8% zirconium oxide powder, 0.05-0.85% graphene powder, 2-8% potassium carbonate sodium powder, 1-3% potassium titanate powder, 2-5% rutile powder, 1-5% corundum powder, 1-3% sodium fluorosilicate powder, and the balance of iron powder, and a weight of the flux core powder accounts for 13-25% of a total weight of the welding wire.Type: GrantFiled: August 8, 2020Date of Patent: December 27, 2022Assignees: HEFEI UNIVERSITY OF TECHNOLOGY, CHINA INNOVATION ACADEMY OF INTELLIGENT EQUIPMENT (NINGBO) CO., LTD.Inventors: Dashuang Liu, Weimin Long, Yucheng Wu, Ping Wei, Huawei Sun, Yafang Cheng
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Patent number: 11130203Abstract: The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire for joining steel workpieces via arc welding includes a steel sheath disposed around a core. The core includes iron powder, iron titanium powder, silico-manganese powder, iron silicon powder, iron sulfide, graphite, rare earth compound, and a frit. The frit includes a Group I or Group II compound, silicon dioxide, and titanium dioxide. The graphite and the frit together comprise less than 10% of the core by weight.Type: GrantFiled: June 29, 2017Date of Patent: September 28, 2021Assignee: HOBART BROTHERS LLCInventors: Steven Edward Barhorst, Mario Anthony Amata
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Patent number: 11103947Abstract: The invention relates to a method of making a steel Yankee cylinder 1 by welding a cylindrical shell 2 to two end walls 3, 4 such that the cylindrical shell 2 and the end walls 3,4 together form the Yankee cylinder 1. The welding operation is carried out exclusively from the outside of the Yankee cylinder 1 and in the welding operation is carried out as a butt welding operation in which a backing material 7 is used on the inside of the Yankee cylinder 1 such that, between each end wall 3, 4 and the cylindrical shell 1, a single weld bead 8 is formed which extends all the way between the opposing surfaces 5, 6 and completely fuses the opposing surfaces 5, 6 of each end wall 3, 4 and the cylindrical shell 2 respectively.Type: GrantFiled: October 29, 2014Date of Patent: August 31, 2021Assignee: VALMET AKTIEBOLAGInventors: Stefan Moden, Magnus Hoegman, Andreas Hjaertqvist
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Patent number: 10661411Abstract: There is disclosed a polishing-surface cleaning apparatus to which a polishing liquid, such as slurry, is less likely to be attached. The polishing-surface cleaning apparatus includes an arm having a fluid passage, a nozzle communicating with the fluid passage, and a weld material securing the nozzle to the arm. The weld material fills a gap between a bottom surface of the arm and an edge of a front-end surface of the nozzle.Type: GrantFiled: November 17, 2015Date of Patent: May 26, 2020Assignee: EBARA CORPORATIONInventors: Ryuichi Kosuge, Hiroshi Sotozaki, Takeshi Kodera, Ryo Hasegawa
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Patent number: 9517523Abstract: This disclosure relates generally to arc welding. In an embodiment, a welding system has a welding gas supply system configured to supply a gas flow including a shielding gas and a fluorine-containing gas to a weld pool. Furthermore, the shielding gas is configured to control an atmosphere surrounding the weld pool, the fluorine-containing gas is configured to reduce diffusible hydrogen in the weld pool, and the fluorine-containing gas is substantially free of sulfur.Type: GrantFiled: April 4, 2011Date of Patent: December 13, 2016Assignee: ILLINOIS TOOL WORKS INC.Inventors: Steven Barhorst, Mario Amata, Joseph C. Bundy
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Publication number: 20140251974Abstract: A self-shielded flux cored arc welding electrode is disclosed including a ferrous metal sheath and a core within the sheath enclosing core ingredients comprise a composition window of aluminum, manganese and rare earth metals in wires of about 2.0-3.0 wt. % [Al], 1.0-2.0 wt. % [Mn] and 0.001-0.11 wt. % rare earth metals or 0.001-0.5% rare earth metal oxides, such as, but not limited to, La, Ce, etc. Resulting welds include 0.7-1.0 wt. % [Al] and 1.1-1.5 wt. % [Mn]. Resulting welds have a maximum diffusible hydrogen content of 5 mL/100 g or less, Resulting welds also have a Charpy V-notch toughness at ?40° F. of at least 100 ft-lbs.Type: ApplicationFiled: March 11, 2013Publication date: September 11, 2014Applicant: THE ESAB GROUP, INC.Inventor: Wesley W. Wang
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Publication number: 20140209590Abstract: A welding system and cored welding electrode composition is disclosed for performing a short arc welding process between an advancing wire electrode and a workpiece. The system comprises a power source with a controller for creating a current pulse introducing energy into the electrode to melt the end of the electrode and a low current quiescent metal transfer section following the end of the melting pulse during which the melted electrode short circuits against the workpiece; a timer to measure the actual time between the end of the pulse and the short circuit; a device for setting a desired time from the pulse to the short circuit; a circuit to create a corrective signal based upon the difference between the actual time and the desired time; and, a circuit responsive to the corrective signal to control a given parameter of the current pulse.Type: ApplicationFiled: March 27, 2014Publication date: July 31, 2014Applicant: LINCOLN GLOBAL, INC.Inventors: Badri K. Narayanan, Russell K. Myers, Patrick T. Soltis
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Patent number: 8563897Abstract: Provided is a welding wire and method for manufacturing a welding wire providing for quality welds on 300 series stainless steel and similar materials. A metal powder core is encapsulated in a metal sheath. The metal sheath composition comprising up to about 6% nickel, by weight, and may correspond to a series 400 stainless steel. A combination of the metal sheath and the metal powder core provides an overall alloy content of a series 300 stainless steel.Type: GrantFiled: April 30, 2007Date of Patent: October 22, 2013Assignee: Illinois Tool Works Inc.Inventors: Daryl L. Duncan, Robert Rutherford
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Patent number: 8431865Abstract: A welding electrode comprising a metal core and a flux coating at least partially coated on an outer surface of said metal core, and also including a end coating material which at least partially inhibits porosity of a weld bead formed during the welding operation.Type: GrantFiled: June 20, 2006Date of Patent: April 30, 2013Assignee: Lincoln Global, Inc.Inventors: Randall M. Burt, Jon P. Chiappone
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Patent number: 8168922Abstract: A cored electrode to form a high manganese metal deposition that includes at least about 4 weight percent manganese and at least about 10 weight percent chromium which is useful in joining dissimilar metals and/or for depositing buffer layers on carbon steel and/or low alloy steels.Type: GrantFiled: October 18, 2004Date of Patent: May 1, 2012Assignee: Lincoln Global, Inc.Inventor: Damian J. Kotecki
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Patent number: 8153934Abstract: A granular flux having controlled amounts of titanium and boron to facilitate in the formation of a weld metal having a high toughness without requiring refinement of the weld metal by reheating the weld metal, and enabling the slag to be easily removed from the weld bead.Type: GrantFiled: September 15, 2006Date of Patent: April 10, 2012Assignee: Lincoln Global, Inc.Inventors: Ashish Kapoor, Teresa Melfi
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Patent number: 7781701Abstract: A welding electrode comprising a metal core and a coating material that includes flux compounds is at least partially coated on an outer surface of said metal core. The tip of the welding electrode is beveled and a portion of the beveled tip has an end coating material which includes an electrically-conductive material.Type: GrantFiled: June 13, 2005Date of Patent: August 24, 2010Assignee: Lincoln Global, Inc.Inventors: Randall M. Burt, Jonathan Sterling Ogborn
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Publication number: 20090321404Abstract: A self-shielding welding electrode and a method of making the same are provided. The self-shielding welding electrode contains rare earth aluminide in either the flux or the electrode portion of the electrode. The self-shielding welding electrode contains at least about 0.5% by weight of the flux of rare earth aluminide.Type: ApplicationFiled: June 27, 2008Publication date: December 31, 2009Applicant: LINCOLN GLOBAL, INC.Inventor: James M. Keegan
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Patent number: 7491910Abstract: An electrode to form a hardfacing alloy for use as a surfacing on metal that is subjected to high thermal and mechanical stresses. The electrode includes chromium, a metal sensitization inhibitor, and iron to form a hardfacing alloy.Type: GrantFiled: March 22, 2006Date of Patent: February 17, 2009Assignee: Lincoln Global, Inc.Inventors: Ashish Kapoor, Teresa Melfi, Damian Kotecki
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Patent number: 7091448Abstract: A cored electrode for arc welding, said electrode having a core in which the fill material includes a manganese-containing composite particle.Type: GrantFiled: July 6, 2004Date of Patent: August 15, 2006Assignees: Hobart Brothers Company, University of TorontoInventors: Thomas H. North, Lowell E. Mott
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Patent number: 7087859Abstract: A welding electrode comprising a metal core and a flux coating at least partially coated on an outer surface of said metal core, and also including a end coating material which at least partially inhibits porosity of a weld bead formed during the welding operation.Type: GrantFiled: May 6, 2004Date of Patent: August 8, 2006Assignee: Lincoln Global, Inc.Inventors: Randall M. Burt, Jon P. Chiappone
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Patent number: 6784401Abstract: A cored electrode for arc welding wherein the electrode has a core in which the fill material includes a manganese-containing composite particle. A method for arc welding comprises providing a cored electrode having a core of fill material including a composite particle containing manganese, and applying a voltage to the electrode upon contacting a work piece to cause the electrode to melt and form a weld metal bead.Type: GrantFiled: January 30, 2001Date of Patent: August 31, 2004Assignees: Illinois Tool Works Inc., University of TorontoInventors: Thomas H. North, Lowell E. Mott
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Patent number: 6521867Abstract: A flux-cored wire for welding shielded by a flow of gas, in particular of the rutile or slag-free type, composed of an outer metal sheath and a central core comprising filling elements, and an MAG gas-shielded welding process using such a flux-cored wire for producing a welded joint on a steel construction, such as an offshore platform or a storage tank. The welded joint obtained has improved impact strength and proved toughness, and contains less than 65 ppm nitrogen, from 300 ppm to 0.12% carbon, from 0.01% to 0.6% silicon, from 0.9% to 1.9% manganese, from 20 ppm to 0.08% titanium, from 1 ppm to 80 ppm boron, from 5 ppm to 150 ppm alumin from 10 ppm to 0.02% niobium and from 10 ppm to 0.02% vanadium.Type: GrantFiled: May 8, 2001Date of Patent: February 18, 2003Assignee: La Soudure Autogene FrancaiseInventors: Christian Bonnet, Bruno Leduey
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Patent number: 6300596Abstract: A flux-cored wire for welding shielded by a flow of gas, in particular of the rutile or slag-free type, composed of an outer metal sheath and a central core comprising filling elements, and an MAG gas-shielded welding process using such a flux-cored wire for producing a welded joint on a steel construction, such as an offshore platform or a storage tank. The welded joint obtained has improved impact strength and improved toughness, and contains less than 65 ppm nitrogen, from 300 ppm to 0.12% carbon, from 0.01% to 0.06% silicon, from 0.9% to 1.9% manganese, from 20 ppm to 0.08% titanium, from 1 ppm to 80 ppm boron, from 5 ppm to 150 ppm aluminum, from 10 ppm to 0.02% niobium and from 10 ppm to 0.02% vanadium.Type: GrantFiled: March 16, 2000Date of Patent: October 9, 2001Assignee: La Soudure Autogene FrancaiseInventors: Christian Bonnet, Bruno Leduey