Showing papers on "Filler metal published in 1978"

Composite compact components fabricated with high temperature brazing filler metal and method for making same

Abstract: A component comprised of a composite compact, preferably diamond, and a substrate bonded to the compact. A preferred embodiment of the component is a cutter for a drill bit. The compact is comprised of a layer of bonded diamond or boron nitride particles and a base layer of cemented carbide bonded, preferably under high temperatures and pressures, to the particulate layer. The particulate layer is degradable by exposure to temperatures above a predetermined temperature. The substrate is bonded to the base layer of the compact with a filler metal which, to form a bond, requires the exposure of the surfaces to be bonded to a temperature substantially greater than the degradation temperature of the particulate layer. The component is fabricated by heating the base layer, filler metal and substrate to a temperature in excess of the degradation temperature while maintaining the temperature of the particulate layer below the degradation temperature via a heat sink.

Ultrasonic metal welding

Abstract: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.

Apparatus for arc welding or plasma cutting

Abstract: An arc welding or plasma cutting apparatus has a current source as well as a set of controls for the welding or cutting process and includes a diagnosis apparatus which can be hooked up to the current source and/or the controls.

Apparatus for connecting metallic parts by means of arc fusion welding

Abstract: An apparatus for connecting metallic parts, and metallic parts so produced, by means of arc fusion welding by producing a low volume welding seam (narrow gap welding), wherein the workpiece parts to be joined and forming a narrow gap are initially welded at their butt joint by means of, for instance, electron-beam welding, plasma-arc welding, laser-beam welding or argon arc-welding to produce a base seam with or without filler material, and thereafter the workpiece flanks forming the narrow gap are united by alternately depositing weld beads at first one and the other workpiece flank by submerged-arc welding

Method for preventing cracks below seams during plating and welding

Abstract: A method for preventing the development of cracks below seams during the plating and welding of material by employing a heat source for producing local heating of the regions of the material adjacent the welding zone.

A process for the diffusion welding of copper and stainless steel

Abstract: A process for the diffusion welding of copper and stainless steel, which comprises sandwiching a thin layer of at least one metal selected from the group consisting of Ni, Ni-base alloys, Cr, Ni-Cr, and Cr-Ni with little gas contents, as an insert metal, between the surfaces of copper and stainless steel to be bonded, and then diffusion welding the sandwich.

Narrow weld-groove welding process and apparatus therefor

Abstract: A narrow weld-groove welding process, in which a bare welding wire is fed into a weld groove defined between the opposed surfaces of two pieces of metals for producing a metal arc therein for welding. In this process, a welding wire is subjected to a plastic deformation of a wave form, before being fed into a nozzle hole provided in a contact tip, and then the wire is fed into a nozzle hole, while maintaining elasticity tending to cause waving, whereby the tip of a welding wire being fed through a nozzle exit is automatically waved between the opposed surfaces of metals to be joined, with the tip of wire being alternately faced in the opposite directions, in response to the weaving motion thereof, with the feeding of the welding wire and progress of welding. In addition, the apparatus for use in a narrow weld-groove welding process is also disclosed.

Welding process for production of a steel pipe

Abstract: Disclosed herein is an improvement of a welding process for welding a steel pipe, wherein a gas metal arc welding is performed to form the first welding layer and a submerged arc welding is performed to form the last welding layer. According to the conventional gas metal arc welding process, i.e. the MIG or CO2 welding processes, the combined use of a high welding current and a welding wire having a small diameter is known to bring about the rotation of the welding arc and the formation of an undercut along the toe of the weld metal. The purpose of the present invention is to weld a steel pipe having either a large thickness or an excellent ductility at a temperature of less than -40° C., or both. According to the present invention, the combined use of a high welding current and a wire having a small diameter is possible, by employing a gas mixture containing an inert gas as a major part thereof and CO2 as an additional part thereof as a shielding gas. In addition, by adequately selecting the wire extension, the gas metal arc welding is improved to provide the features of: deep and round penetration; stable arc formation with stiffness of the arc, and; high metal deposition rate.

Process for fabricating homogeneous, ductile brazing foils and products produced thereby

Abstract: Brazing of metal parts employing a homogeneous, ductile, filler metal foil is disclosed The brazing foil, useful for brazing stainless steels, has a composition consisting essentially of 0 to about 4 atom percent iron, 0 to about 21 atom percent chromium, 0 to about 16 atom percent boron, 0 to about 19 atom percent silicon, 0 to about 22 atom percent phosphorus and the balance 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 iron, chromium and nickel ranges from about 76 to 84 atom percent and the total of boron, silicon and phosphorus ranges from about 16 to 24 atom percent The ductile foil permits fabrication of preforms of complex shapes which do not require binders and/or fluxes necessary for brazing powders presently used to braze stainless steels and nickel base alloys

Gas Tungsten Arc Welding

Abstract: Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually an inert gas such as argon), and a filler metal is normally used, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma.

Energy beam welding with filler material

Abstract: In automatic energy beam welding, as electron beam welding, of workpiece edges which form a gap of varying width along the weld line, the amount of filler material needed for making up for the volume of the gap is determined by probing the size of the solidified weld bead at a surface of the workpiece and the rate of supply of filler material to the welding zone is controlled on the basis of the result of such determination such that the size is maintained between predetermined limits.

Method for electroslag welding of metals

Abstract: A method for electroslag welding of metals whose density is less than thatf welding fluxes, is provided. The method is based on floating-up of drops of molten metal of the edges being welded and of the electrode in a slag whose density exceeds that of the metal. The floating-up metal drops form a metal bath on the surface of the slag bath, and crystallization of the metal bath produces a weld. In the course of welding, the electrode metal is fed into the slag bath in the upward direction, while the electrode metal melts and the weld is built up in the downward direction.

Method and device for welding protected metal parts

Abstract: A method and apparatus for welding or brazing of sheetmetal or plate covered with a temperature degradable protective coat, such as zinc or plastic. A cooling saddle supplied with liquid nitrogen is arranged on the side of the plate opposite that adjacent the welding torch. During the formation of the weld, gaseous nitrogen escapes through holes in the saddle to cool the protective coat and keep it from melting or volatilizing.

Welding of Railroad Rails—A Literature and Industry Survey

Abstract: Literature and industrial sources relating to methods for welding of railroad rails are surveyed. The welding processes included are thermite, flash, gas-pressure, and arc welding. Process and procedural descriptions, weldment properties, service performance in track, fabrication costs, and production rates are reviewed.

Gas metal arc welding apparatus for repairing misaligned tube holes

Abstract: A welding apparatus including a nozzle assembly having a contact extension and a contact tip for guiding a consumable welding wire into a tube hole. The consumable welding wire is guided into the tube hole and an electric current is passed to the wire to produce an arc between the tip of the wire and the sidewall of the tube hole, melting the wire and supplying filler weld to the hole. The nozzle assembly has a gas nozzle; and, during the welding process, an inert gas is delivered into the tube hole through the gas nozzle.

Welded aluminum die cast article

Abstract: A welded aluminum die cast article and method for making. Two or more die cast pieces are welded together to form a single part. The welding takes place along a welding seam characterized by formation of a relatively deep molten pool of metal within the weld seam during the welding operation.

Method of joining frogs of wear-resisting manganese steel castings to rails of carbon steel

Abstract: A method of joining frogs consisting of wear-resisting austenitic manganese steel casting to rails of carbon steel by welding and with the aid of an interposed connector consisting of austenitic low-carbon steel, characterized in that the connector is first welded to the regular rail or interconnecting rail, particularly by flash-butt welding, that the length of the connector which has been welded to the regular rail is limited to 20 to 25 mm, at most, preferably to 15 to 20 mm, that in a second welding operation the frog consisting of a wear-resisting manganese steel casting is welded to the connector, preferably by flash-butt welding, and that the cooling after the second welding operation is effected at a higher rate than the cooling after the first welding operation.

Mig arc welding method

Abstract: PURPOSE: To make large the amount of the deposited metal, and to execute the MIG arc welding with a good shape of penetration and a small rate of dilution, by feeding the arbitrary filler wire into the molten metal in which the molten particle of the welding wire is forced to cause the spray transfer. CONSTITUTION: The electrode wire 1 contacts with the work 3 to be welded, the arc 4 is generated, and the welding is executed. While the welding work, when the spray transfer is caused in a small molten particle, the filler wire 5 is always fed into the molten metal 9 formed by the arc. According to this method, the generation of the spatter is prevented, the amount of the deposited metal is increased, and the shape of penetration is rounded. By this method, a great effect is given to the overlay welding and the joint welding. COPYRIGHT: (C)1979,JPO&Japio

Development of nickel--chromium--silicon base filler metals

Abstract: Ni--Cr--Si and Ni--Cr--Si--P alloys were used for brazing experiments. Their strength properties were tested using the AWS single-lap standard method. The ability of the investigated alloys for high temperature brazing filler metal is discussed.

Welding method of hard metal

Abstract: PURPOSE: To obtain the weld zone which is free from any structural defect layer and has sufficient strength at low cost by directly welding WC-base sintered hard metal and iron-base member through the use of a Fe-Ni-base filler metal which does not contain Cr. CONSTITUTION: In order to obviate the formation of any structural defect layer in the weld zone 4 to be formed by a hard metal tile 1, iron-base member 2 and filler metal (welding rod) 3 at the time of welding the WC-base sintered hard metal tile 1 to the iron-base member 2 which becomes the base metal to be welded, the hard metal tile 1 and iron-base member 2 are directly welded by using the filler metal of Fe-Ni base without containing Cr. According to this method, the occurrence of cracking in the hard metal tile 1 is obviated as well. COPYRIGHT: (C)1980,JPO&Japio

Direct current mig welding

Abstract: PURPOSE: For high speed welding that prevents magnetic blow, current is made in the same direction when filler metal is upstream of electrode in welding direction, and current is made in the reverse direction when it is downstream, thereby always directing arc at weld forwarding direction. CONSTITUTION: In direct TIG welding, when filler metal 6 is upstream in welding direction, the base material 1 is made positive and the electrode 2 negative, so that the filler metal 6 is the same porality as the electrode 2. Such same porality generates attracting magnetic field to cause arc column to direct at forward welding direction. When filler material 6' is down stream of welding direction, the filler metal 6' is made positive and the base material 1 negative so that the filler metal 6' and the base material 1 are in reverse porality. This generates repulsive magnetic field to cause arc column 3 to direct at weld forwarding direction. Thus, the process provides neatly beaded high-speed welding. COPYRIGHT: (C)1979,JPO&Japio