Weld Metal Composition Patents (Class 219/137WM)
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Patent number: 5296676Abstract: A TIG weld produced from a rapidly solidified dispersion strengthened aluminum base alloy exhibits attributes of the alloy's microstructure extant prior to formation of the weld. TIG welding power is adjusted to minimize energy input into the weld. An arc gas contacts the weld to maximize rapid quenching thereof, while a second gas contacts the undersurface of the weld so that the undersurface of the weld is quenched. Cooling of the weld is further enhanced by a trailing gas selected from the group consisting of argon, nitrogen, helium, carbon dioxide and mixtures thereof.Type: GrantFiled: May 20, 1993Date of Patent: March 22, 1994Assignee: Allied-Signal Inc.Inventor: Paul S. Gilman
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Patent number: 5260540Abstract: In a method of modifying qualities of materials at their local parts, the method comprises the steps of: making capsule particle by encapsulating a core particle with covering particles; making a wire by filling a sheath member with the capsule particle; and making weld cladding on the material whose qualities are to be modified with the wire.Type: GrantFiled: January 25, 1991Date of Patent: November 9, 1993Assignee: Isuzu Motor LimitedInventors: Tadashi Kamimura, Tadashi Tsujimura
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Patent number: 5256856Abstract: This invention involves a MIG welding method for aluminum alloys to prevent the formation and deposition of black powder on or around the weldment's bead. By using pure aluminum wire or aluminum alloy wire containing less than 2.5 wt% the base of alloying components as the consumable electrode wire and using aluminum alloy wire as the filler wire 3, the consumable electrode wire 2 and the filler wire 3 are fed into the a metal bath under a certain weight ratio, so that the alloy composition of the molten metal bath is equivalent to that of the base of the black powder on the both sides of the weldment's bead can be is avoided.Type: GrantFiled: April 15, 1992Date of Patent: October 26, 1993Assignees: Kyodo Oxygen Co., Ltd., Sumitomo Light Metal Industries, Ltd.Inventors: Hideaki Takano, Jitsuo Nakata, Yuji Nakahara, Keizoh Nanba, Yoshihiko Sugiyama
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Patent number: 5233160Abstract: A consumable welding electrode for electric arc welding in a shielding gas and producing reduced amounts of fume during said welding comprising in combination a steel sheath and a filler within the sheath. The filler including metallic aluminum powder and a dual stabilizing agent of sodium oxide and potassium oxide, wherein the dual stabilizing agent and said aluminum have about a 2.4:1 to 3.5:1 weight ratio.Type: GrantFiled: June 22, 1992Date of Patent: August 3, 1993Assignee: The Lincoln Electric CompanyInventors: Ronald J. Gordish, Robert P. Munz, Dennis D. Crockett
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Patent number: 5225661Abstract: A consumable welding element for arc welding comprising a steel sheath surrounding a compacted core containing metal alloying powders and an essentially 100% basic compound in an amount less than about 1.60% of the total weight of said element. The basic compound is calcium fluoride powder which is preferably in the range of about 0.1% to about 0.9% calcium fluoride powder by total weight of the element. As another feature the core of the element contains a specific agent for decreasing the amount of diffusible hydrogen in the weld metal. This new element may be a filler metal for TIG welding; however, it is preferably a consumable electrode for MIG welding.Type: GrantFiled: December 12, 1991Date of Patent: July 6, 1993Assignee: The Lincoln Electric CompanyInventors: Chang-Shung Chai, David A. Fink, John Gonzalez
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Patent number: 5171958Abstract: A high-efficiency fillet welding method for conducting, without edge preparation, T-shape fillet welding of thick steel webs having a C content not more than 0.21 wt %. The welding is conducted by using a leading electrode (L) and a trailing electrode (T) composed of wires of about 4.8 to 6.4 mm diameter and containing C in an amount which meets the condition of formula (1), as well as 1.50 to 2.50 wt % of Mn. The welding is executed in such a manner that the ratio I.sub.T /I.sub.L of the current I.sub.T supplied to the trailing electrode (T) to the current I.sub.L supplied to the leading electrode (L) ranges from 0.75 to 1.00. The flux used in the welding is a bonded flux containing 60 to 91 wt % in total of SiO.sub.2, MgO and CaO, 5 to 30 wt % in total of TiO.sub.2, Al.sub.2 O.sub.3 and CaF.sub.Type: GrantFiled: August 13, 1991Date of Patent: December 15, 1992Assignee: Kawasaki Steel CorporationInventors: Tadamasa Yamaguchi, Yoshimitsu Meguro, Saburo Hayashi, Matsushige Nakajima
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Patent number: 5134267Abstract: A method of conducting circumferential welding on electric welded steel pipes to form a continuous line pipe to be laid on the sea bottom by a reel barge method. The formation of the final welding layer is executed with a welding material having a strength which is 5 kg/mm.sup.2 or more lower than that of the welding material used for forming the welding layers underlying the final layer. Preferably, the reinforcement of weld is formed to meet the conditions of:2 mm.ltoreq.radius of curvature at the toe of weld120.degree..ltoreq.angle of toe of weld0.8 mm.ltoreq.height of reinforcement of weld.ltoreq.1.8 mmPreferably, the electric welded pipes as the base metal has the composition: containing C: 0.03 to 0.20 wt %; Mn: 0.50 to 1.5 wt %; Si: 0.05 to 0.50 wt %; Al: 0.005 to 0.060 wt %; Nb, V and Ti in total: not greater than 0.040 wt %; and the balance substantially Fe and incidental impurities, Preferably, the carbon equivalent Ceq and the weld cracking sensitivity Pcm, satisfy the following conditions of:0.20.Type: GrantFiled: June 29, 1990Date of Patent: July 28, 1992Assignee: Kawasaki Steel CorporationInventors: Takuya Atsumi, Katsuomi Tamaki
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Patent number: 5118919Abstract: In a consumable welding element for depositing a weld metal bead onto a steel workpiece with the diffusible hydrogen in the weld metal being less than 2.0 ppm, the oxygen of the weld metal being less than 0.040% by weight and the yield strength of the weld metal being greater than about 85,000 psi, there is provided an improvement wherein the weld metal is a steel alloy including, as a percentage by weight of the weld metal, 0.03-0.09% carbon, 2.5-4.0% manganese, 0.01-0.05% titanium, silicon less than about 1.0%, nickel less than about 2.0%, and oxygen less than about 0.035%.Type: GrantFiled: March 29, 1990Date of Patent: June 2, 1992Assignee: The Lincoln Electric CompanyInventors: Chang-Shung Chai, David A. Fink, John Gonzalez
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Patent number: 5095191Abstract: A metal cored electrode for CO.sub.2 gas shielded welding has 5% to 30% core ingredients in a ferrous metal tube with a seam. The core includes, based upon the weight of the electrode: from about 0.01% to about 0.5% cesium, from about 0.1 to about 3.0 cesium/other alkali metal(s) on a weight basis, the other alkali metals selected from the group consisting of lithium, sodium, potassium and rubidium; andfrom about 0.3% to about 10% of alloying elements selected from silicon, manganese, and optionally titanium, columbium, aluminum, nickel, chromium and cobalt;up to 0.08% boron; andbalance iron together with incidental impurities.The electrodes are used in reverse and straight polarity DC and AC CO.sub.2 gas shielded welding processes for providing stable arcs and reduced spatter levels as well as high quality weld deposits.Type: GrantFiled: December 10, 1990Date of Patent: March 10, 1992Assignee: Alloy Rods Global, Inc.Inventors: Roger A. Bushey, Stanley E. Ferree
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Patent number: 5093148Abstract: An arc-melting method is taught for the formation of metallic-second phase composite materials. The method involves the formation of an intermediate composite material comprising a relatively high loading of second phase particles dispersed in a metal matrix. This intermediate material is then combined with an additional amount of metal and arc-melted to form a final composite comprising a lower loading of the second phase particles dispersed in a final metallic matrix. The final metallic matrix may be comprised of a metal, metal alloy, or intermetallic, while the second phase particles may comprise ceramic materials such as borides, carbides, nitrides, silicides, oxides or sulfides.Type: GrantFiled: July 10, 1991Date of Patent: March 3, 1992Assignee: Martin Marietta CorporationInventors: Leontios Christodoulou, Dennis C. Nagle, John M. Brupbacher
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Patent number: 5091628Abstract: A consumable welding element for arc welding comprising a steel sheath surrounding a compacted core containing metal alloying powders and an essentially 100% basic compound in an amount less than about 1.60% of the total weight of said element. The basic compound is calcium fluoride powder which is preferably in the range of about 0.1% to about 0.9% calcium fluoride powder by total weight of the element. As another feature the core of the element contains a specific agent for decreasing the amount of diffusible hydrogen in the weld metal. This new element may be a filler metal for TIG welding; however, it is preferably a consumable electrode for MIG welding.Type: GrantFiled: May 20, 1991Date of Patent: February 25, 1992Assignee: The Lincoln Electric CompanyInventors: Chang-Shung Chai, David A. Fink, John Gonzalez
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Patent number: 5049716Abstract: Methods for providing erosion resistant surfaces to carbon steel turbine components are provided by this invention. The methods include welding a steel weldment comprising at least 12 wt. % Cr. on to a carbon steel steam turbine component at a welding speed of about 24-52 inches, 61-132 cm, per minute in a nominal first pass thickness of less than about 0.1 inches, 0.25 cm. Preferred flux-cord-arc welding (FCAW) techniques are disclosed for vertical down, overhead, horizontal and flat surfacing positions.Type: GrantFiled: August 7, 1989Date of Patent: September 17, 1991Assignee: Westinghouse Electric Corp.Inventors: James C. Dunmire, Samuel D. Reynolds, Jr.
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Patent number: 5015823Abstract: A high manganese weld bead and electrode for producing same which has higher abrasion resistance and hardness than heretofore and is economical to manufacture. The deposit contains approximately 0.4-0.7% C, 10-16% Mn and 4.5 to 7.5% Cr.Type: GrantFiled: August 21, 1989Date of Patent: May 14, 1991Assignee: The Lincoln Electric CompanyInventors: Dennis D. Crockett, Robert P. Munz
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Patent number: 5003155Abstract: A consumable welding element for arc welding comprising a steel sheath surrounding a compacted core containing metal alloying powders and an essentially 100% basic compound in an amount less than about 1.60% of the total weight of said element. The basic compound is calcium fluoride powder which is preferably in the range of about 0.1% to about 0.9% calcium fluoride powder by total weight of the element. As another feature the core of the element contains a specific agent for decreasing the amount of diffusible hydrogen in the weld metal. This new element may be a filler metal for TIG welding; however, it is preferably a consumable electrode for MIG welding.Type: GrantFiled: September 11, 1989Date of Patent: March 26, 1991Assignee: The Lincoln Electric CompanyInventors: Chang-Shung Chai, David A. Fink, John Gonzalez
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Patent number: 4999478Abstract: A metal cored electrode for CO.sub.2 gas shielded welding has 5% to 30% core ingredients in a ferrous metal tube with a seam. The core includes, based upon the weight of the electrode: from about 0.01% to about 0.5% cesium, from about 0.1 to about 3.0 cesium/other alkali metal(s) on a weight basis, the other alkali metals selected from the group consisting of lithium, sodium, potassium and rubidium; andfrom about 0.3% to about 10% of alloying elements selected from silicon, manganese, and optionally titanium. columbium, aluminum, nickel, chromium and cobalt;up to 0.01% boron; andbalance iron together with incidental impurities;The electrodes are used in reverse and straight polarity DC and AC CO.sub.2 gas shielded welding processes for providing stable arcs and reduced spatter levels as well as high quality weld deposits.Type: GrantFiled: October 23, 1989Date of Patent: March 12, 1991Assignee: Alloy Rods Global, Inc.Inventors: Roger A. Bushey, Stanley E. Ferree
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Patent number: 4959518Abstract: A method of stud welding stainless steel studs to carbon steel or low alloy steel components with formation of a ductile weld therebetween. The chromium equivalent and nickel equivalent of the steel component is determined and a stainless steel stud provided that has a chromium equivalent and nickel equivalent content which, upon dilution thereof by steel of the component during stud welding, will provide a structure of austenite plus ferrite in the resulting weld structure, and stud welding the specified stainless steel stud to the steel component.Type: GrantFiled: May 30, 1989Date of Patent: September 25, 1990Assignee: Westinghouse Electric Corp.Inventor: Samuel D. Reynolds, Jr.
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Patent number: 4958060Abstract: A clad metal electrode having a core, a sleeve and a consolidated metal powder therebetween bonding the sleeve to the core. The clad metal electrode is particularly useful with an iron rod core and compressed nickel powder between the iron rod and the nickel sleeve. The resultant clad welding rod permits higher operating amperages during welding operations.Type: GrantFiled: July 12, 1989Date of Patent: September 18, 1990Assignee: Inco Alloys International, Inc.Inventors: William L. Mankins, David O. Gothard, Charles P. Hardy
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Patent number: 4939338Abstract: A pressure gauge fabricated from directly welded pieces of dissimilar metals. The gauge includes a casing, a tubular socket, and a Bourdon tube. The casing is fabricated of stainless steel and has an aperture with a flange. The socket is fabricated of aluminum bronze and is positioned within the aperture and flange in line contact therewith. The tubular socket also has a bore. The Bourdon tube is fabricated of stainless steel and is positioned within the bore in line contact therewith. Single weld lines exist along the lines of contact between the casing and the socket and between the socket and the Bourdon tube as caused by welding without a filler or insert material operatively associated with the single weld lines.Type: GrantFiled: May 9, 1986Date of Patent: July 3, 1990Assignee: Dresser Industries, Inc.Inventors: Louis F. Bregy, Jack Conti, Joseph E. Gorgens
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Patent number: 4912299Abstract: Method of welding aligned aluminum torque tube components, comprising (i) defining a stepped square-butt joint to be welded by preforming the ends of said torque tubes and assembling such ends together in the nested condition; (ii) establishing an electrical direct current arc between a positive consumable aluminum-based electrode and said joint as cathode, the arc being shrouded in a shielding gas consisting, by volume, of 2-5% oxygen and the remainder inert gas, the current to the arc being pulsed at a frequency of 40-60 cycles per second while maintaining an average current of at least 200 amps; and (iii) while holding the pulsed arc in a predetermined orientation (i.e., position angle 45.degree.-60.degree., lead angle 5.degree.-15.degree., transverse angle 12.degree.) to the joint, moving the arc along the joint in a single pass at a relative speed of at least 60 inches per minute.Type: GrantFiled: September 11, 1989Date of Patent: March 27, 1990Assignee: Ford Motor CompanyInventors: Alvin K. Oros, Paul D. DeJager
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Patent number: 4843211Abstract: A process for welding 6XXX copper-containing alloy members which includes using a 5XXX aluminum filler alloy having an Mg content from 7.0 to 8.5% by weight.Type: GrantFiled: March 17, 1987Date of Patent: June 27, 1989Assignee: Aluminum Company of AmericaInventor: Richard P. Martukanitz
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Patent number: 4782211Abstract: A cluster welding electrode assembly is provided which permits the deposition of maximum weights of weld metal with minimum amperage and voltage values. The assembly is comprised of a central rod electrode having circumferentially grouped or nested thereabout in longitudinally aligned relationship a plurality of lesser diameter rod electrodes. Each of the rods in the assembly carries thereon a novel flux coating productive during the welding operation of a nickel-chromium-molybdenum type alloy characterized as dense, porous-free and homogenous. The flux composition incorporates defined amounts of molybdenum and tungsten, and there is obtained by practice of the invention weld metal of low carbon content and substantially improved physical properties.Type: GrantFiled: April 21, 1987Date of Patent: November 1, 1988Assignee: Weld Mold CompanyInventor: Matt Kiilunen
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Patent number: 4772771Abstract: A method for the production of an electric seam welded steel pipe for oil-well use which has good resistance to collapse pressure and souring, by providing a steel containing 0.08-0.26% C by weight, 0.8-1.9% Mn by weight, 0.5% or less Si by weight, the remainder being Fe and unavoidable impurities, subjecting the steel to hot rolling, and hardening, and coiling the treated steel at a temperature not exceeding 250.degree. C., after which the steel is then formed into tubular form and welded by electric resistance welding to produce an electric seam welded pipe, and the weld heat affected zones of the pipe are subjected to heating to a temperature of 900.degree. C. or more to effect hardening, and then the whole pipe is tempered.Type: GrantFiled: May 21, 1986Date of Patent: September 20, 1988Assignee: Nippon Steel CorporationInventors: Hiroshi Murayama, Youji Yamamoto, Motofumi Koyuba
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Patent number: 4751366Abstract: Process for arc fusion welding under atmospheric conditions of a base material which is a nitrogen alloyed steel, in which the bulk share of nitrogen in the steel is above its solubility limit under atmospheric conditions. The nitrogen released during the melting of the base material is confined to the melting bath formed during the welding.Type: GrantFiled: May 12, 1986Date of Patent: June 14, 1988Assignee: Fried Krupp GmbHInventors: Friedhelm Trosken, Reinhard Muller
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Patent number: 4739150Abstract: Two lead members are juxtaposed on an electrically conductive surface forming a first electrode. A direct current electric arc is struck between a second electrode and at least one of the lead members. Inert gas is directed at the area being welded and the arc and work are moved relative to each other. The lead members are typically sheet members and the welds may be of the general types of welds formed with other metals. No metal is added in the welding process.Type: GrantFiled: December 8, 1986Date of Patent: April 19, 1988Inventors: Clifton H. Canter, Jr., Christopher L. Canter
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Patent number: 4717536Abstract: Weld bead analysis and electrode capable of producing same, which in multiple pass welding of thick steel plates, results in fine grain structure and high impact strength. The analysis includes as necessary ingredients, titanium, nitrogen and chromiumwith a maximum limitation on auminum, if present. The electrode contains titanium and chromium. The welding is in air and the titanium picks up nitrogen from the air and carries it into the weld bead as micro particulates of titanium nitride, which forms nucleation points for commencing fine grain growth.Type: GrantFiled: January 24, 1986Date of Patent: January 5, 1988Assignee: The Lincoln Electric CompanyInventors: Chang-Shung Chai, Jon McCollister
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Patent number: 4642446Abstract: An improved method is disclosed for producing a welded joint between galvanized steel sheet members utilizing a laser beam or the like. Surface regions of the galvanized member in the weld zone are selectively pretreated to remove the zinc coating and apply a nickel-base coating. The nickel coating avoids the vaporization problems associated with zinc, while providing suitable corrosion protection in the welded joint.Type: GrantFiled: October 3, 1985Date of Patent: February 10, 1987Assignee: General Motors CorporationInventor: Edward J. Pennington
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Patent number: 4625095Abstract: A welding method forms a fiber reinforced weld in a fiber metal matrix composite. Novel weld rods or consumable electrodes for introducing the fibers to the molten weld pool are disclosed. Reinforcing fibers are added to a molten weld pool that is initially substantially free of fibers. The fibers strengthen the weld. The concentration of the fiber should be controlled so that the viscosity of the pool remains suitable for welding.Type: GrantFiled: June 10, 1985Date of Patent: November 25, 1986Assignee: The Boeing CompanyInventor: K. Bhagwan Das
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Patent number: 4593174Abstract: A method for arc welding a very low carbon steel containing 0.005-0.06% C characterized by employing a welding material with nickel together with high carbon so as to form weld metal containing nickel. Solidification cracking on the thus welded metal can be prevented.Type: GrantFiled: April 18, 1983Date of Patent: June 3, 1986Assignee: Nippon Steel CorporationInventors: Shoji Saito, Nobutaka Yurioka, Shigeru Oshita
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Patent number: 4582978Abstract: Method for gas metal arc welding of very low carbon steel in which a crack-free region where high temperature cracking does not occur is obtained by controlling the carbon content of the weld metal.Type: GrantFiled: February 27, 1985Date of Patent: April 15, 1986Assignee: Nippon Steel CorporationInventors: Naomichi Mori, Hiroyuki Honma, Masakuni Wakabayashi, Tsuyoshi Takino
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Patent number: 4558202Abstract: For making defect-free welds for joining two austenitic stainless steel mers, using gas tungsten-arc welding, a thin foil-like iron member is placed between the two steel members to be joined, prior to making the weld, with the foil-like iron member having a higher melting point than the stainless steel members. When the weld is formed, there results a weld nugget comprising melted and then solidified portions of the joined members with small portions of the foil-like iron member projecting into the solidified weld nugget. The portions of the weld nugget proximate the small portions of the foil-like iron member which project into the weld nugget are relatively rich in iron. This causes these iron-rich nugget portions to display substantial delta ferrite during solidification of the weld nugget which eliminates weld defects which could otherwise occur.Type: GrantFiled: August 17, 1983Date of Patent: December 10, 1985Assignee: The United States of America as represented by the Department of EnergyInventors: Christopher Bagnall, Marvin A. McBride
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Patent number: 4544823Abstract: To obtain acceptable arc percussion welding of tin plated copper pins to thin brass strip members, the tin must be prevented from becoming trapped in the weld zone and gaseous and other forms of material also being trapped. By giving the end of a pin a smooth, hemispherical profile, the plasma arc is initiated at the center of the pin end and progressively moves radially outwards. This melts the tin plate layer and the tin is caused to flow radially outwards from the weld zone. The copper of the pin and brass of the strip then melt slightly and on impact welding is achieved. The outward flow of tin also assists in causing other undesirable elements being removed from the weld zone.Type: GrantFiled: June 27, 1983Date of Patent: October 1, 1985Assignee: Northern Telecom LimitedInventor: George Tihanyi
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Patent number: 4542280Abstract: A method of welding a pair of aluminum driveshaft components together is disclosed. A first driveshaft component is formed with a hollow cylindrical end portion having an inside diameter and a flat radially-extending end surface. A second driveshaft component is formed with a cylindrical end portion extending axially from a flat radially-extending shoulder. The end portion of the second driveshaft component has an outside diameter which is approximately equal to the inside diameter of the cylindrical end portion of the first component. The cylindrical end portion of the first component is telescopically positioned about a portion of the cylindrical end portion of the second component such that a predetermined distance defining a longitudinally-extending annular gap therebetween is maintained between the end surface of the first component and the shoulder of the second component. A welding compound is supplied within the gap to weld the first and second driveshaft components together.Type: GrantFiled: October 25, 1983Date of Patent: September 17, 1985Assignee: Dana CorporationInventor: Samuel Simons
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Patent number: 4534793Abstract: Filler compositions based on manganese and manganese-nickel for the welding of cast iron are disclosed. The filler compositions contain about 15 to 50% manganese and 10 to 35% nickel. The filler compositions may be incorporated into a welding rod or a flux.Type: GrantFiled: November 16, 1982Date of Patent: August 13, 1985Assignee: Research CorporationInventors: David L. Olson, Alfredo D. Marquez
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Patent number: 4525620Abstract: A method of welding ferritic stainless steel to austenitic stainless steel to form a corrosion-resistant welded article having a stabilized weld joint is provided. The ferritic steel contains 17 to 35% chromium and a total carbon and nitrogen less than the total carbon and nitrogen of the austenitic steel containing 16 to 29% chromium. The weld is stabilized with up to 4% stabilizer selected from the group consisting of titanium and columbium, and at least 0.5% stabilizer when the weld deposit contains at least about 22% chromium or at least 30% total of chromium and three times the molybdenum content, and at least 0.8% stabilizer for less than about 22% chromium or less than about 30% total of chromium and three times the molybdenum content. The source of the stabilizer may be the ferritic steel or austenitic steel or a weld filler metal.A corrosion-resistant welded article produced by the method is also provided, such as a ferritic stainless steel tube and austenitic stainless steel tubesheet.Type: GrantFiled: September 15, 1982Date of Patent: June 25, 1985Assignee: Allegheny Ludlum Steel CorporationInventors: Harry E. Deverell, Jack M. Beigay
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Patent number: 4503314Abstract: A method of welding opposite end surfaces of two titanium alloy parts kept in alignment by a high energy-density welding process such as electron beam welding, laser beam welding or TIG arc welding, characterized by closely interposing an insert member of either practically pure titanium or Ti-Al binary alloy containing up to 3 Wt % of Al. Owing to thorough alloying of the inserted titanium with the constituents of the fused base metal, the weld metal in a weld joint obtained by this method is sufficiently high in both strength and toughness. By an optional postwelding heat treatment, the strength of the weld metal can further be enhanced.Type: GrantFiled: April 26, 1982Date of Patent: March 5, 1985Assignees: Nissan Motor Company, Limited, Hitachi, Ltd.Inventors: Tsuneo Kakimi, Megumi Nakanose, Hiroshi Satoh, Takaharu Konishi, Hisanao Kita, Takamitsu Nakazaki
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Patent number: 4492849Abstract: A method of autogenous welding steel strip is disclosed including the steps of applying to at least one edge of a section of the strip to be welded, a material selected from the group consisting of titanium, titanium alloys, aluminum and manganese, positioning the edges in desired relative relationship and effecting welding. The applied material effects a chemical change in the steel strip to resist hot cracking in the weld, provides increased ductility and increased strength. The steel strip is preferably silicon steel or stainless steel strip.Type: GrantFiled: May 26, 1981Date of Patent: January 8, 1985Assignee: Allegheny Ludlum Steel CorporationInventor: Jack M. Biegay
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Patent number: 4486647Abstract: Aluminum is joined to titanium by welding using so much welding energy that the temperature on the titanium side of the alloying melt boundary remains below 2000.degree. C., while titanium and aluminum do, however, melt at the joint interface.In a weldment thus obtained, the base material alloys and aluminum filler of which contain at maximum 10% titanium, there is in the vicinity of the interface between titanium and aluminum only a discontinuous .beta.-phase, dispersed in the aluminum matrix.Type: GrantFiled: May 3, 1982Date of Patent: December 4, 1984Assignee: Finnish Chemicals OyInventors: Osmo Kuusinen, Mikko Rantanen, Olavi Rintanen, Reijo Pajunen, Pekka Oittinen, Kalevi Valtanen
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Patent number: 4465921Abstract: A flux-cored welding electrode for gas-shielded arc welding comprising a mild steel sheath and a flux core, said flux core having the following composition based on the total weight of the electrode:TiO.sub.2 -4 to 8.5%Mg-0.2 to 0.8%Ti-0.03 to 0.7%B-0.002 to 0.025%Mn-1.0 to 3.0%Si-0.01 to 1.2%Metal fluorides-0.1 to 0.30% as F-contentOxides-not more than 8.5%, including TiO.sub.2.Type: GrantFiled: June 3, 1982Date of Patent: August 14, 1984Assignee: Kobe Steel, LimitedInventors: Yoshiya Sakai, Yasuhiro Nagai, Kazuo Ikemoto, Takakiyo Aoki, Hidehiko Kanehira
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Hard facing of metal substrates using material containing VC and improved flux compositions therefor
Patent number: 4451508Abstract: Hard facing of iron and iron base alloy substrates is disclosed using a hard facing material containing vanadium carbide and a flux composition containing nickel boron or calcium silicon. The nickel boron is used in amounts ranging from about 1 to 3% by weight of the mixture while the calcium silicon is used in amounts ranging from about 0.1 to 0.5% by weight of the mixture.Type: GrantFiled: June 28, 1982Date of Patent: May 29, 1984Assignee: Union Carbide CorporationInventor: Harry J. Brown -
Patent number: 4446351Abstract: A process for preparing a press die comprises forming a metal overlaid on a base metal which is different in kind from the overlaid metal, and cutting the base metal together with overlaid metal into a predetermined shape.Type: GrantFiled: November 30, 1981Date of Patent: May 1, 1984Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kenji Kawaguchi, Osamu Hamada, Seigo Hiramoto, Yukio Kato, Kozo Yamada
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Patent number: 4439498Abstract: A covered electrode for welding chloride resistant stainless steel of the type containing about 0.04% carbon, 20% chromium, 24% nickel, 5% molybdenum, and balance iron. The covered electrode provides the capability for producing substantially defect-free stainless steel weld deposits that offer excellent resistance to crevice corrosion, as well as general corrosion in chloride containing environments.Type: GrantFiled: August 21, 1978Date of Patent: March 27, 1984Assignee: The International Nickel Company, Inc.Inventor: Edward P. Sadowski
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Patent number: 4430545Abstract: A method for producing line pipe of high strength and high toughness by the submerged-arc welding process in which a welding wire containing 0.18-0.55% C. is used, Ti or B or both are added to the welding wire or flux or both, and a steel containing 0.005-0.06% C. is welded by the submerged-arc welding process, whereby both Ti and B are caused to be present in the weld metal.Type: GrantFiled: September 15, 1981Date of Patent: February 7, 1984Assignee: Nippon Steel CorporationInventors: Naomichi Mori, Hiroyuki Homma, Masakuni Wakabayashi, Masanobu Yamaguchi
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Patent number: 4426426Abstract: Spheroidal graphite cast iron body can be welded using a welding alloy whose carbon diffusion rate is sufficiently high that cementite formation is prevented. The alloy has essentially the following composition:less than 0.2% manganese,less than 2.0% carbon,2.5 to 3.2% silicon,up to 1.0% copper,up to 0.5% molybdenum,up to 2% aluminum,up to 30% nickel,up to 0.1% tungsten,up to 0.1% chromium,up to 0.1% vanadium, magnesium and/or rare earth elements in an amount up to and sufficient to promote the formation of graphite spherolites upon cooling, andbalance substantially iron.Type: GrantFiled: July 22, 1982Date of Patent: January 17, 1984Inventor: Horst Muhlberger
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Patent number: 4424436Abstract: A crucible for containing molten magnesium, and a process for forming the crucible. The crucible is formed from ferritic stainless steel, and particularly type 444 stainless steel plate. The method involves forming ferritic stainless steel plate into component parts of the crucible, while maintaining the ferritic stainless steel plate at temperatures above about 200.degree. F. but below the "blue brittle" temperature range. Further, the method involves special techniques for welding the crucible parts. Specifically, the crucible parts are preheated to a temperature of 100.degree. -150.degree. C. and are completely welded by a process utilizing multiple welding passes with a special metal inert gas shielded welding technique before any cool down of the crucible parts below 100.degree. C. is allowed. The welds extend completely through the crucible walls, which are the thickness of steel plate, and completely incorporate the crucible parts while being essentially free of cracks.Type: GrantFiled: December 24, 1981Date of Patent: January 3, 1984Assignee: American Tank & Fabricating CompanyInventor: Kenneth J. Humberstone
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Patent number: 4412122Abstract: A method for welding bodies made of very hard or highly refined armor steel, particularly objects to be armored against the penetration of projectiles, flying bodies, splinters or the like, wherein armor steel bodies arranged in juxtaposition with a gap therebetween are provided, in the region of the root of the joint, with preferably one bar each, and/or a filler body of, in particular, an unalloyed steel is arranged in the joint so as to cover the joint gap. The armor steel bodies are welded together without preheating with a suitable ferritic welding material, of like base, under a protective gas atmosphere and after cooling of the weld seam from the welding heat to not less than 100.degree. C., the weld seam is heated locally and progressively without any holding period to at least 450.degree. C. and subsequently, without maintaining a certain ambient temperature and/or period of time, the weld seam is cooled to ambient temperature in air.Type: GrantFiled: July 10, 1978Date of Patent: October 25, 1983Assignee: Thyssen Industrie Ag MaschinenbauInventors: Gunter Bohm, Wolfram Funk
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Patent number: 4396822Abstract: A welding wire for automatic arc welding, which is particularly suitable for use in build-up welding operation for the purpose of providing hard surface to a metal die. The welding wire consists of a continuous tubular metal casing and a core composition charged in the interior of the casing and comprises such amounts of Ni, Si, B, Nb and C as essential alloying elements that the deposited metal contains at least 40% of Ni, 3-8% of Si, 0.1-0.4% of B, 0.3-1.8% of Nb and 0.2-1.5% of C, all by weight. Preferably, either a practically pure Ni strip or an Fe-Ni alloy strip is used as the material of the casing, and the core composition in the form of a powder mixture contains necessary amounts of Ni, Si, B, Nb and C, optionally with the addition of a small amount of Zr. The deposited metal given by this welding wire has high wear resistance and good antifrictional property and seldom suffers from weld cracks.Type: GrantFiled: October 16, 1981Date of Patent: August 2, 1983Assignee: Nissan Motor Co., Ltd.Inventors: Katsuhiro Kishida, Sumio Hirao, Hirohiko Date
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Patent number: 4394560Abstract: A covered electrode for shielded metal arc welding, which is particularly suitable for use in build-up welding operation for the purpose of providing hard surface to a metal die. The covered electrode comprises such amounts of Ni, Si, B, Nb, C and Zr as essential alloying elements that the deposited metal contains at least 40% of Ni, 3-8% of Si, 0.1-0.5% of B, 0.3-2.0% of Nb, 0.2-1.5% of C and 0.01-0.20% of Zr, all by weight. In a preferred form, either Ni wire or Fe--Ni wire is used as the core wire, and the covering contains necessary amounts of all the essential alloying elements except Ni. The deposited metal has high wear resistance and good antifrictional property, and the presence of Zr is highly effective for preventing the occurrence of weld cracks.Type: GrantFiled: October 9, 1981Date of Patent: July 19, 1983Assignee: Nissan Motor Company, Ltd.Inventors: Katsuhiro Kishida, Yutaka Mekuchi, Sumio Hirao, Hirohiko Date
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Patent number: 4390777Abstract: A process for the fusion welding of nickel alloy steel members wherein a ferrite containing pellet is inserted into a cavity in one member and melted by a welding torch. The resulting weld nugget, a fusion of the nickel containing alloy from the members to be welded and the pellet, has a composition which is sufficiently low in nickel content such that ferrite phases occur within the weld nugget, resulting in improved weld properties. The steel alloys encompassed also include alloys containing carbon and manganese, considered nickel equivalents.Type: GrantFiled: March 19, 1981Date of Patent: June 28, 1983Assignee: The United States of America as represented by the United States Department of EnergyInventors: Kenneth C. Thomas, Eric D. Jones, Marvin A. McBride
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Patent number: 4366364Abstract: A flux-cored wire for use in gas shielded arc welding wherein flux of the following composition (weight % with regard to the entire wire) is inserted as a core into a metallic casing and the whole hydrogen content (H) of the wire is defined as 15 ppm .ltoreq.H.ltoreq.139+440F ppm (F: the weight % of fluorine with regard to the entire wire):______________________________________ Metal fluoride (as fluorine) 0.025-0.35% preferably, 0.025-0.27% Metal carbonate .ltoreq.0.5 One or more selected from Al, Ti, V and Ca .ltoreq.0.75% TiO.sub.2 3.5-7.4% SiO.sub.2 .ltoreq.2.0% MgO and/or ZrO.sub.2 0.03-1.2% Al.sub.2 O.sub.3 .ltoreq.1.5% C .ltoreq.0.15% Mn 1.2-3.0% Si 0.3-1.2%.Type: GrantFiled: September 2, 1980Date of Patent: December 28, 1982Assignee: Kobe Steel, Ltd.Inventors: Toshio Arai, Hidehiko Kanehira, Kazuo Ikemoto
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Patent number: RE32892Abstract: A method of welding a pair of aluminum driveshaft components together is disclosed. A first driveshaft component is formed with a hollow cylindrical end portion having an inside diameter and a flat radially-extending end surface. A second driveshaft component is formed with a cylindrical end portion extending axially from a flat radially-extending shoulder. The end portion of the second driveshaft component has an outside diameter which is approximately equal to the inside diameter of the cylindrical end portion of the first component. The cylindrical end portion of the first component is telescopically positioned about a portion of the cylindrical end portion of the second component such that a predetermined distance defining a longitudinally-extending annular gap therebetween is maintained between the end surface of the first component and the shoulder of the second component. A welding compound is supplied within the gap to weld the first and second driveshaft components together.Type: GrantFiled: March 31, 1987Date of Patent: March 21, 1989Assignee: Dana CorporationInventor: Samuel Simons