Showing papers on "Filler metal published in 1981"
Patent•
11 Sep 1981
TL;DR: In this article, a layer of welding material is placed over the surface area of the weld joint, and is a type of material which is substantially absorbent of radiation at the wavelength of the laser welding beam.
Abstract: An arrangement for laser beam welding wherein at least one of the components being welded is formed of a material which is substantially transparent to radiation at the wavelength of the laser welding beam. A layer of welding material is placed over the surface area of the weld joint, and is a type of material which is substantially absorbent of radiation at the wavelength of the laser welding beam. The welding material is then irradiated by the laser beam through the component which is substantially transparent thereto for a sufficient period of time to cause melting of the welding material and fusion thereof to the two components being welded. The present invention has particular applicability to welding with a Nd-YAG laser of components formed of silica-containing material, such as fused silica or titanium silicate, and wherein the welding material placed at the weld surface area is a titanium based material. The present invention is also particularly attractive for weld locations which are physically inaccessible to direct irradiation, but can be irradiated through the material which is substantially transparent to the laser welding beam.
65 citations
Patent•
29 Oct 1981
TL;DR: In this paper, the AMS4777 alloy (3B 4Si 7Cr 3Fe 83Ni) was replaced by a brazing alloys selected from particular alloys of the B-Si-Ni-Fe and B-NiNi-Cr-Fe systems.
Abstract: Iron based brazing alloys selected from particular alloys of the B-Si-Ni-Fe and B-Si-Ni-Cr-Fe systems are practical substitutes for AMS4777 alloy (3B 4Si 7Cr 3Fe 83Ni).
27 citations
Patent•
16 Oct 1981
TL;DR: 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, is described in this paper.
Abstract: 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.
24 citations
Patent•
04 Aug 1981TL;DR: In this paper, a method of welding for hard surfacing is described, which involves feeding a powdery mixture, prepared by adding at least one of the powders on NbC, VC, and TiC to the powder of an alloy steel containing either Fe, Ni, and Cr, or Fe and Cr as the chief components, to an arc produced between a base metal of iron or steel and a nonconsumable electrode shielded by an inert gas.
Abstract: A method of welding for hard surfacing comprises feeding a powdery mixture, prepared by adding at least one of the powders on NbC, VC, and TiC to the powder of an alloy steel containing either Fe, Ni, and Cr, or Fe and Cr as the chief components, to an arc produced between a base metal of iron or steel and a nonconsumable electrode shielded by an inert gas, and thereby forming a weld metal on the base metal.
22 citations
Journal Article•
20 citations
TL;DR: In this article, the microstructure of tungsten inert gas (TIG)-arc welding and resistance welding in Zircaloy 4 tubing is described in relation to the phases present.
Abstract: The microstructure of tungsten inert gas (TIG)-arc welding and resistance welding in Zircaloy 4 tubing is described in relation to the phases present. Differences in microstructure between the weld zone and base tubing are discussed in terms of the phase transformations that take place during the very different thermal cycles occurring in both processes and a comparison between them is made. A feature of the weld region is the presence of a coarse grained Widmanstatten structure in the TIG welding while a martensitic-type structure or very fine Widmanstatten structure is present in resistance welding.
17 citations
Patent•
26 Mar 1981
TL;DR: In this article, a micro-arc brazing and welding of metal to metal or ceramic is performed using high frequency electrical discharge cleaning techniques using high energy ions from either the ambient gas or from an electrode.
Abstract: Method and apparatus for micro-arc brazing and welding of metal to metal or ceramic. The control of arc heat flux density is accomplished by controlling the ambient gas pressure and providing an argon, argon/5% hydrogen or other inert gas atmosphere. The discharge current is controlled so as to provide an arc which is operable at 100 microamps to 20 amps. Prior to welding or brazing, the work is cleaned by high frequency electrical discharge cleaning techniques using high energy ions from either the ambient gas or from an electrode. By providing a small amount of DC during the high frequency discharge a "tinning" capability is established. The welding or brazing may be formed in a closed chamber so that arc stabilization can be accomplished.
16 citations
Patent•
30 Mar 1981
TL;DR: An arc welding apparatus that imparts a rotational movement to the tip of the consumable electrode to cause drops of molten metal to be thrown by centrifugal force against the sidewall of the slot between the two metal workpieces being welded is described in this paper.
Abstract: An arc welding apparatus that imparts a rotational movement to the tip of the consumable electrode to cause drops of molten metal to be thrown by centrifugal force against the sidewall of the slot between the two metal workpieces being welded.
14 citations
Journal Article•
13 citations
Patent•
23 May 1981
TL;DR: In this article, a steel contg. is melted and cast into ingot, which is then subjected to hot wire rod rolling, cold drawing, annealing, and cold drawing to manufacture filler metal 1.6mm in diameter.
Abstract: PURPOSE:To provide filler metal, which has excellent resistance to weld crack, for high-manganese, austenitic steel, by using high-manganess steel of specific composition, or by addition of specific quantities of B, N, or various alloy elements separately or in combination. CONSTITUTION:A steel contg. <0.8% C, <1.0% Si, 19-40% Mn, <0.04% P is melted and cast into ingot. The ingot is subjected to hot wire rod rolling, cold drawing, annealing, cold drawing to manufacture filler metal 1.6mm. in diameter. On in addition, one or more members among <10% Ni, <15% Cr, <3% Mo. <4% Co, <3% Cu, or <=2% one or more members among Nb, V, Ti, Zr, Al, or addition elements such as <0.02% B or <0.4% N, etc., are added to said components separately or in combination. Hereby, filler metal, excellent in weldability especially in resistance to weld crack, for high manganese, austenitic steel is manufactured.
Patent•
15 Jun 1981
TL;DR: In this article, the end part of tube fitting hole 4 of titanium or titanium clad tube plate 2 is tapered and the end of this tube is extended to the tapered part.
Abstract: PURPOSE:To form a welding part which is not polluted by active gas and does not generate fragileness, by inserting a titanium tube into the fitting hole of the tube plate to extend the tube end and by lowering the welding current to weld the same position after welding the tube end. CONSTITUTION:The end part of tube fitting hole 4 of titanium or titanium clad tube plate 2 is tapered. Thin titanium tube 1 is inserted into fitting hole 4, and the end part of this tube is extended to the tapered part of fitting hole 4. Next, the tube end and tube plate 2 are subjected to TIG welding without a filler metal to form a weld casting. Further, this weld metal 7 is subjected to TIG welding by lowering the welding current and is fused again to form weld casting 7' of a casting depth shallower than the first. By this method, titanium tube 1 and titanium tube plate 2 for the heat exchanger are connected without blowholes and bubbles.
TL;DR: In this article, the authors performed steady and cyclic creep tests with internal pressure at temperatures of 800 to 1000°C on Hastelloy X cylinders with and without a circumferential Tungsten Inert Gas (TIG) welding technique.
Patent•
26 Sep 1981
TL;DR: In this paper, two sets of guiding pins are placed to face each other at a spacing slightly wider than the width of the sheet 100 and guide the sheet 10 inserted therebetween on the surface thereof.
Abstract: PURPOSE:To eliminate clogging and to improve working efficiency by erecting two pieces of guiding pins for a brazing filler metal to a jig for guiding the brazing filler metal and guiding the thin sheet of the brazing filler metal drawn out from a reel. CONSTITUTION:A titled device consisting of a reel 1 which is coiled with a thin sheet 100 of a brazing filler metal, a drawing device which draws out the sheet 100, a jig 14 for guiding the brazing filler metal which guides the sheet 100 drawn from the reel, cutters 5, 6 which cut the sheet 100 to prescribed lengths, a vacuum suction needle 7 which sucks the cut pieces 101 of the sheet 10 by vacuum, and a holder 8 for the suction needle. Said jig 14 has 2 sets of guiding pins 14a-14d which are placed to face each other at a spacing slightly wider than the width of the sheet 100 and guide the sheet 10 inserted therebetween on the surface thereof. Said holder 8 is so formed as to hold the suction needle 7, to move the needle 7 sucking the piece 101 to above the die pad part 30 of a lead frame, to adhere the piece 101 to the part 30 and to return the needle 7 to the home position.
Patent•
18 Feb 1981
TL;DR: In this article, a method of welding which utilizes a metal electrode core encased within a pre-sintered ceramic insulating sleeve is described. But this method requires the metal core electrode rod to be encased in a ceramic plate.
Abstract: A method of welding which utilizes a metal electrode core encased within a pre-sintered ceramic insulating sleeve. The method comprising, preplacing a welding wire in the welding kerf formed between the pieces to be welded, tacking the welding wire in place such that the wire abuts the surface of the pieces to be welded, guiding the metal core electrode rod encased in a ceramic pre-sintered sleeve over the welding wire, and simultaneously, torching the welding wire so that a uniform weld deposit is formed.
Patent•
14 Jan 1981
TL;DR: In this paper, a homogeneous ductile filler metal foil is described for brazing iron, nickel and cobalt base alloys, which has a composition essentially of 1 to about 41 atom percent palladium, 0 to about 20 atom percent chromium, 11 to 20 percent boron and the balance essentially nickel and incidental impurities.
Abstract: Brazing of metal parts employing a homogeneous, ductile filler metal foil is disclosed. The brazing foil, useful for brazing iron, nickel and cobalt base alloys, has a composition essentially of 1 to about 41 atom percent palladium, 0 to about 20 atom percent chromium, 11 to about 20 atom percent boron and the balance essentially nickel and incidental impurities. In addition to containing the foregoing elements within the above noted composition ranges, the composition must be such that the total of nickel, palladium and chromium ranges from about 80 to 89 atom percent and the total amount of boron constitutes the remainder that is 11 to 20 atom percent. THe ductile foil permits fabrication of preforms of complex shapes and do not require binders or fluxes.
Patent•
05 Nov 1981
TL;DR: In this paper, a filler metal having the compsn added with 30-60wt% Mg, 1.5-10wt% Zr, 005-03wt% Mn, 001-03twt% Ti, 0000 1-001wt% B, and 00 5-05wt% Fe to Al is used as a filler material to be used for welding Al alloy members.
Abstract: PURPOSE:To provide an Al alloy filler metal having excellent mechanical properties and corrosion resistance without any weld crack, by adding specific amts of Mg, Zr, Mn, Ti, B and Fe to Al CONSTITUTION:A filler metal having the compsn added with 30-60wt% Mg, 015-10wt% Zr, 005-03wt% Mn, 001-03wt% Ti, 00001-001wt% B, and 005-05wt% Fe to Al is used as a filler metal to be used for welding Al alloy members A weld zone having excellent mechanical properties and corrosion resistance is obtd without any weld crack
Patent•
04 Jun 1981
TL;DR: In this article, the authors proposed an Al alloy filler metal with high toughness at low temp. This alloy is obtd. by adding Ni to an Al-Mg alloy to remarkably improve the toughness of a weld zone which is the largest defect of an Al structure.
Abstract: PURPOSE:To provide an Al alloy filler metal having a specified composition contg. Mg, Ni, Al, etc., improving the low temperature brittleness of a weld zone which is the largest defect of an Al structure, making the structure lightweight, and enhancing the strength of the structure. CONSTITUTION:This Al alloy filler metal with high toughness at low temp. consists of, by wt., over 6-10% Mg, 0.006-3% Ni and the balance Al or further contains one or more among 0.05-1.5% Mn, 0.01-0.5% Cr, 0.005-0.2% Ti, 0.001-0.01% B and 0.01-0.5% Zr as required. This alloy is obtd. by adding Ni to an Al-Mg alloy to remarkably improve the toughness at low temp., and the low temp. brittleness of a weld zone which is the largest defect of an Al structure is improved.
Patent•
10 Dec 1981
TL;DR: In this article, the authors proposed a method to produce a titled brazing filler metal free from defects such as chipping, fracture and the like in good yields by subjecting a heavily laminated raw material of an Au raw material and an Sn raw material repeatedly to cold rolling and stress relief under heating and further to final stress relief over heating thereby growing diffused phases of Au and Sn over the entire area between Au phases and Sn phases.
Abstract: PURPOSE:To produce a titled brazing filler metal free from defects such as chipping, fracture and the like in good yields by subjecting a heavily laminated raw material of an Au raw material and an Sn raw material repeatedly to cold rolling and stress relief under heating and further to final stress relief under heating thereby growing diffused phases of Au and Sn over the entire area between Au phases and Sn phases. CONSTITUTION:An Au raw material 1 and an Sn raw material 2 are superposed alternately to make a haevily laminated raw material 3 of 5-layered laminations of, for example, Sn-Au-Sn-Au-Sn. Here, the total weight of the material 1 and the total weight of the material 2 are so controlled as to attain the compsn. wt% of the intended Au- Sn eutectic alloy brazing filler metal. After the material 3 is subjected to about 10- 50% cold rolling, the material is subjected to stress relief under heating and both stages are repeated particularly a number of times. By such treatments, Au phases 4-, Sn phases 5- are made gradually thin and both phases are stuck continuously to Au, Sn diffused phases 6-. The composite raw material 7 obtained by the final cold rolling is rolled to a desired thickness and is then subjected to desired working according to need to a prescribed size. The material is subjected to the final stress relief under heating, whereby the intended Au-Sn eutectic alloy brazing filler metal is obtained.
Patent•
03 Aug 1981
TL;DR: In this article, a core material of a brazing sheet having superior cathodic protection effect and made of Al alloy contg. was provided to protect the surface of the sheet from corrosion.
Abstract: PURPOSE:To provide a core material of a brazing sheet having superior cathodic protection effect and made of Al alloy contg. Mn, Mg, In and Zn in a specified ratio. CONSTITUTION:This core material is made of Al alloy contg., by wt., 0.3-1.5% Mn, 0.2-1.0% Mg, 0.005-0.1% In and 0.8-3.0 Zn. By carrying out vacuum brazing using this core material, the cathodic protection effect of Zn and In in a surface part prevents Al from corroding after the brazing, and joined part of a member to which this brazing sheet has been joined is also protected from corrosion. As a coating material bonded to the core material a conventional Al alloy brazing filler metal such as an Al-Si-Mg alloy brazing filler metal contg. about 9% Si and about 1% Mg is used.
Patent•
19 Dec 1981
TL;DR: In this article, a brazing filler metal used to braze a chip of hard metal to a steel base metal is prepared with a Cu alloy having the following composition: 7.5-45% Mn, 0.1-25% Zn, 1-15% one or more of Ni, Fe, Co.
Abstract: PURPOSE:To obtain a brazing filler metal low in melting point and excellent in wetting property and workability by adding Al, B, Li and rare earth elements to a Cu-Mn base alloy containing Zn, Fe group metals and Ag. CONSTITUTION:A brazing filler metal used to braze a chip of hard metal to a steel base metal is prepared with a Cu alloy having the following composition: 7.5-45% Mn, 0.1-25% Zn, 0.1-25% Ag, 1-15% one or more of Ni, Fe, Co. Or, 0.01- 3% Al or 0.001-0.8% one or both of B, Li are further added to the above-mentioned alloy, or above-mentioned elements are added in combination. Or, 0.005- 0.3% rare earth elements are further added to the above-mentioned Cu alloy. Or, rare earth elements and Al, rare earth elements and B, Li or combination of the above are added to the Cu alloy.
Patent•
24 Jun 1981
TL;DR: In this paper, a component-controlled ingot block which is interposed within the root surfaces in the groove of a welded joint is welded under the conditions of burying the arc.
Abstract: PURPOSE:To control the component compsns of weld metal and to prevent the generation of microcracks by penetrating a component-controlled ingot block which is interposed within the root surfaces in the groove of a welded joint deep by welding under the conditions of burying the arc CONSTITUTION:In submerged or gas shielded arc welding of multiple electrodes, for example, in the former, an insert 5 of a steel block 5 is held in place between the butt surfaces of steel plates 1, 1' to be welded The arc is generated between a wire 7 and the insert 5 in the flux to melt the insert partially, whereby molten metal 3 is formed After this, the plates 1, 1' are turned over to weld the opposite side similarly and to melt the unmolten insert 5 fully, and this completes the welding of the plates 1, 1' The dependency of the compsn of the metal 3 upon the plates 1, 1' is reduced by this; therefore, the metal 3 of high cracking resistance is formed by controlling the components of the insert 5
Patent•
29 Aug 1981
TL;DR: In this article, the authors propose a method to make a brazed structural body by joining an Al material and a Cu material by way of a filler metal, and apply Ni plating on the joining part at least one of the Al materials and the Cu material, to form a plating layer.
Abstract: PURPOSE:To braze an Al material and a Cu material in a short time with good workability by beforehand forming an Ni plating layer or an Ni clad layer on the joining part of said materials. CONSTITUTION:In the case of making a brazed structural body by joining an Al material and a Cu material by way of a brazing filler metal, Ni plating is beforehand applied on the joining part at least one of the Al material and the Cu material, to form a plating layer. It is equally well to form an Ni clad layer in place of the plating layer. After this, the Al material and the Cu material are brazed by using a brazing filler metal, for example, a brazing filler metal consisting of, for example, Al-Si or an alloy consisting essentially of Al-Si.
Patent•
20 May 1981TL;DR: In this paper, a brazing joint is subjected to heating that is complementary to and independent of the heating obtained through thermal contact with the preheated parts, by causing to circulate a strong intensity electric current in the wire 4, inserted into the above-mentioned circuit and which is in contact with parts 8, 9, this current dissipating through the Joule effect a calorific power localized and dissipated in the high value electric resistance created on the wire-part contact.
Abstract: 1. A brazing process in which all the parts 8, 9 to be assembled are preheated by induction, and arranged in an electric circuit, the filler metal being brought in the presence of a flux on contact with the parts, the form of coils 1 of wire 4 reeled off continuously, process characterized in that the brazing joint 7 is subjected to heating that is complementary to and independent of the heating obtained through thermal contact with the preheated parts, by causing to circulate a strong intensity electric current in the wire 4, inserted into the above-mentioned circuit and which is in contact with parts 8, 9, this current dissipating through the Joule effect a calorific power localized and dissipated in the high value electric resistance created on the wire-part contact 7.
Patent•
17 Jan 1981
TL;DR: In this paper, the welding conditions under which globule diameter becomes of granular form smaller than the wire diameter are selected by the electric power source, and filler metals are fed to welding pool by being controlled by filler metal control units 12, 12' and oscillated at arbitrary periods by weaving mechanisms 14, 14'.
Abstract: PURPOSE:To achieve welding of higher performance by letting the globule transfer mode of MIG welding be granular transfer smaller than electrode diameter and weaving and feeding the separately provided two filler metals at arbitrary periods to the right and left centering at the molten pool in the welding advance direction. CONSTITUTION:An MIG welding wire 1 is set in the welding position of the weldwork 6 and an electric power source 8 is turned ON. The wire shorts to the welding work via the feed rollers 2 and welding tip 3, thereby generating arc. At the same time, shielding gas 15 is fed through a shielding gas sealing port 5. The welding conditions under which globule diameter becomes of granular form smaller than the wire diameter are selected by the electric power source. Filler metals 10, 10' are fed to welding pool 16 by being controlled by filler metal control units 12, 12' and are oscillated at arbitrary periods by weaving mechanisms 14, 14'. The filler metals are melted by the MIG arc heat and join with deposited metal, thereby yielding the good weld zone.
Patent•
28 Feb 1981
TL;DR: In this paper, a simple method of repairing castings without selfpig-making action and much residual stresses by utilizing super-plastic solidus sealing method and specifying shape of a filler metal.
Abstract: PURPOSE:To provide a simple method of repairing castings without selfpig-making action and much residual stresses by utilizing super-plastic solidus sealing method and specifying shape of a filler metal. CONSTITUTION:A defective portion 1a of a casting is filled with a conical or semispherical filler metal 2 in which the height h and radius r of a projecting portion thereof are in relation with each other such as h/r=0.02-0.3. While a proper pressure is applied to this filler metal and defective portion of casting, heat cycle is given to raise and lower transformation temperature range of casting material and weld said portion completely to the filler metal for repair.
Patent•
09 Dec 1981
TL;DR: In this article, the authors proposed to form a different metal joint of aluminum material and stainless steel by welding stainless steel having a thin silver plated layer and an aluminum alloy member to form excess metal and an overlapped part with deposited metal.
Abstract: PURPOSE:To form a different metal joint of aluminum material and stainless steel by welding stainless steel having a thin silver plated layer and an aluminum alloy member to form excess metal and an overlapped part with deposited metal. CONSTITUTION:A step is provided on a stainless steel member 1 and a faucet type groove is made to lap the end of an aluminum alloy member 2 on the step. The stainless steel member 1 is sand blasted and plated with copper or nickel. Finally, it is plated with silver 20-50mu in thickness. A wide groove is made on the aluminum alloy member 2 and deposited metal 4 is built up by TIG welding using aluminum alloy such as 43S as filler metal. The deposited metal adapts itself well to be silver plated part 3 and a part is molten and combined with it. However, it is not fused into the base metal, and joining strength is obtained by the overlapped part A, excess metal part D, faucet type groove by the zone B etc.
Patent•
16 Dec 1981
TL;DR: In this article, the minimum necessary welding current to melt the material to be welded is used and welding is performed in a short time. But no cracking due to deposition of carbide occurs in the weld zone, and welding of Ni base sintered hard alloy heat resisting steel can be put to practical use.
Abstract: PURPOSE:To enable welding with a weld zone excellent in quality and free from cracks by welding an Ni base sintered hard alloy heat resisting steel combining solution welding by arc welding method and specified heat treatment after welding. CONSTITUTION:In manufacturing a turbine blade by welding using an Ni base sintered hard alloy heat resisting steel, the material to be welded is heated beforehand to 500-650 deg.C, and TIG welding is performed while inserting a filler wire in inert atmosphere using Ar gas as shield gas. Minimum necessary welding current to melt the material to be welded is used and welding is performed in a short time. Before temperature of the weld zone drops to below 850 deg.C (point A), the material is put in a heating furnace set at 850 deg.C beforehand, heated to 1,100-1,200 deg.C and kept for 1-5hr. Then, after slow cooling to room temperature (point B), the material is aged by heating to 820-860 deg.C and keeping for 10-30hr. No cracking due to deposition of carbide occurs in the weld zone, and welding of Ni base sintered hard alloy heat resisting steel can be put to practical use.
Patent•
07 Dec 1981
TL;DR: In this paper, the authors stick brazing filler metal uniformly to two pieces of pipe materials in the stage of press-fitting two pipe materials having different heat capacities by heating the fitting parts thereof electrically to temp. lower than the melting temperature.
Abstract: PURPOSE:To stick brazing filler metal uniformly to two pieces of pipe materials in the stage of press-fitting two pieces of the pipe materials having different heat capacities and brazing the same, by heating the fitting parts thereof electrically to temp. lower than the melting temp. of the brazing filler metals then again conducting electricity thereto after a specified cooling period, thereby heating the two pipe materials to the melting temp. of the brazing filler metals approximately simultaneously. CONSTITUTION:After brazing filler metals are disposed in the fitting parts of two pieces of the above-described pipe materials, the fitting parts are subjected to the 1st electrical heating to the extent that said parts do not attain the melting temp. of the brazing filler metals. At the point of the time when the smaller diameter pipe cools down to the temp. lower than that of the larger diameter pipe upon lapse of a specified cooling period, again the fitting parts are subjected to the 2nd electrical heating. Both pipe materials are heated approximately simultaneously up to the melting temp. of the brazing filler metals. As a result, the brazing filler metals are stuck uniformly in the fitting parts of both pipe materials.