Showing papers on "Filler metal published in 1975"

Method and apparatus for shortcircuiting arc welding

Abstract: A method and apparatus for controlling the welding current in shortcircuit transfer arc welding including a method and control apparatus for maintaining the effective value of the welding current during arcing period at a predetermined value. Maintenance of the effective value of welding current during arcing period is necessary to keep the size of a fusion zone and the depth of penetration constant throughout welding operation.

Indium-containing silver-copper-zinc brazing alloy

Abstract: A filler metal composition and method are provided for producing strong brazed joints between metal parts, e.g. steel parts, assembled in joint-forming relationship with each other, the filler metal comprising an indium-containing silver brazing alloy consisting essentially by weight of about 30% to 70% Ag, about 3% to 20% In, about 3% to 20% Zn, up to about 0.5% Si and the balance essentially copper.

Indium-containing, low silver copper-base filler metal

Abstract: A filler metal composition and method are provided for producing strong brazed joints between metal parts, e.g. steel parts, assembled in joint-forming relationship with each other, the filler metal comprising an indium-containing, low silver, copper base brazing alloy consisting essentially by weight of about 0.5% to 15% Ag, about 1% to 14% In, about 50% to 85% Cu, up to about 0.6% Si and the balance essentially zinc.

Method for specifying hot isostatic pressure welding parameters

Abstract: A procedure for graphically presenting the minimum pressure and temperature required for hot isostatic pressure welding of metals and alloys is described. The use of one such graph for specifying weld parameters is demonstrated and is found to be reasonably accurate. (auth)

Aluminum brazing method

Abstract: An improved method for brazing aluminum and alloys of aluminum in which at least one of the surfaces to be joined is coated with a controlled quantity of metallic manganese which is effective during the high temperature vacuum brazing operation to promote a wetting and flow of the brazing filler metal between the surfaces to be joined and a penetration of the tenacious aluminum oxide film thereon, thereby producing a substantially uniform and high strength bond.

Method of vertical welding of aluminum and aluminum alloys

Abstract: A method of vertical welding of aluminum and aluminum alloys comprising welding Al or an Al alloy while oscillating in a welding groove an electrode in a closed pattern corresponding substantially to the groove shape, wherein the welding is conducted by using a welding current higher by 10 to 150 A than the base welding current at least during the course of oscillation of the electrode along the groove face of one of the materials to be welded while the electrode is pursuing courses of oscillation along both groove faces of the materials to be welded.

Backing flux for one side arc welding

Abstract: PURPOSE:To provide the subject flux wherein an aqueous dextrin solution which has been prepared in a specific viscosity is mixed and added in the flux thereby to apply the solution on the flux uniformly, and further applying a suitable quantity of calcium stearate on the surface thereof thereby to make it possible to carry out effective welding.

Nickel-chromium filler metal

Abstract: A nickel-chromium-titanium filler alloy for inert gas shielded-arc welding of 50% Cr, 50% Ni type alloys. The wrought alloy is characterized by a single phase austenitic microstructure and contains, by weight, from about 42 to about 46% chromium, from about 0.1 to about 1.8% titanium, from about 0.01 to about 0.1% carbon, and up to about 0.1% magnesium with the balance, apart from incidental elements, essentially nickel. The alloy provides sound welds having a two phase microstructure that afford elevated temperature strength and corrosion resistance equal to that afforded by base metals of the 50% Cr, 50% Ni type.

Flux-cored wire for electric arc welding of soft steels or low-alloyed steels

Abstract: Flux-cored wire for automatic or semi-automatic arc welding process, comporting specific powder compositions as detailed in the description, which are high in amounts of metallic powders, mixed with metallic silicate solution to form a paste and baked before its introduction within a low-carbon or low-alloy steel sheath.

Austenitic weldable manganese-chromium-nickel steel - has low coefft. of thermal expansion and good notch impact toughness at very low temp.

Abstract: The low temp. steel contains 0.01-0.5% C, 0.05-1.5% Si, 9.0-35% mn, 0.5-9.5% Cr, 0.01-8.0% Ni, 0.005-0.5% N, and usual impurities. It contains in addn. 0.05-4.0% Mo, W and Co singly or together, and 0.05-1.5% Nb, Ti, V, Al and Cu singly or together. The steel has good weldability. It is used for liquid gas vessels suitable for use at room temp. and to -196 degrees C, and as filler metal rod in welding similar material.

Electroslag welding of high nickel alloys

Abstract: The feasibility of electroslag welding of Inconel 600 and Incoloy 800 was investigated. Sound electroslag welds were made without difficulty in 1 in. alloy 600, 1 in. alloy 800 and 4/sup 1///sub 2/ in. alloy 800 with both matching composition electrodes and Inconel Filler Metal 82. It is significant that this was possible for matching filler metal because these are often not suitable for use with other welding processes. The electroslag weld deposits had uniform analyses from top to bottom and very low sulfur levels. The strengths of weld deposits were lower than those of annealed base metal at room temperature but came close to or exceeded them at elevated temperature. One-in.-thick welds were stronger than 4/sup 1///sub 2/-in.-thick welds. The welds had excellent room temperature ductility in both the as-welded condition and after a treatment of 1300/sup 0/F/20 h/AC. Stress rupture ductilities in the 1000 to 1400/sup 0/F range were unusually high (approximately 50 percent elongation). In the as-welded condition parts of the heat-affected zone in the 4/sup 1///sub 2/ in. alloy 800 welds were susceptible to intergranular attack. This condition was probably exaggerated by the relatively small size of the plates which resulted in an inadequate heat sink. more » Little or no attack occurred in the weld metals. « less

Welding process for aluminum or chrome diffusion-coated steel

Abstract: In conducting the butt welding of a coated steel produced by applying a diffusion coating with aluminum or chromium on the surface of a chromium-molybdenum steel as the base metal, adoption of a process comprising welding the diffusion-coating side of said coated steel with a ferritic high chrome steel to begin with, next welding it with a molybdenum steel or chromium-molybdenum steel selected on the bases of the content of chromium and the content of molybdenum in the base metal, and lastly welding it with the same material as the base metal, varieties of such drawbacks as would ordinarily arise from the weld zone can be avoided.

Prevention of end cracking in one-side automatic welding

Abstract: Recently one-side automatic welding has widely prevailed in the assembly stage of Japanese shipyards. As one of the problems of welding procedure, as well as any other welding technique, cracking which sometimes occurs near the end of weld has become an important problem. As regards the prevention of end cracking in one-side automatic welding, a new preventing method is proposed. In the process of welding hydraulic jack should be used to control the opening displacement of the plates at the end of weld and furthermore specimen should be used with no bead placed extended over 2000mm from the specimen end. Experimentally it is comfirmed that end cracking could be prevented almost perfectly where the new preventing method is applied. In order to analyze this preventing method the authors have proposed a new calculation technique in the seam welding. The most significant feature of this technique differing from ordinary welding thermal stress analysis is that the conditions of calculation are simulated to be those of more realistic welding procedures. The following assumptions are imposed in order to calculate stress and strain during welding. 1) Before welding, two plates are connected with only tack welds and welding groove is free edge. 2) Stresses are always assumed to be elastic except in metal beyond 700 deg C in which stiffness is taken as zero, so molten pool near the arc is free from stress. 3) When the arc reaches to a tack weld, the tack weld is melted away and redistribution of the forces takes place. 4) As the arc proceeds, the temperature of deposit metal decreases at a certain portion, then melted metal is solidified and the metal at the portion now becomes stiff, so the portion should be changed to supported edge from free grooved edge beforehand. This calculation method is carried out by using the finite element method and it proves to be very effective for a time-depending welding phenomena. The following results are obtained. 1) End cracking in one-side automatic welding is greatly influenced by the displacement and its rate to which weld metal is subjected. 2) Cracking can be completely prevented by use of dynamical method whereby the end is externally restrained by a hydraulic jack and in addition by the method improving the bead shape and increasing hot ductibility of weld metal by using of multiple electrodes welding process. 3) To analyze transient phenomena in one layered butt joint welding, a new numerical calculation technique by using the finite element method is proposed. This method proves to be very effective for such a time-depending welding phenomena. 4) It is comfirmed that the posibility of occurrence of end cracking in 20Y specimen seems to be seldom, according to the calculated results by using this numerical method. 5) When weld length is about 6,000mm, changes in groove opening caused by the welding heat source are almost the same as those for welding actually done in shops.

Boron alloyed iron powder for filler metals

Abstract: An alloying element in the form of metal powder as a part of the flux composition with regard to nucleation agents and/or nitrogen binding elements and strong deoxidizers alloyed iron powder where the alloying content exists in an essentially more diluted state than hitherto has been used in the commercially available alloying metals wherein a practical application of the micro alloying technique is possible, which is used when producing fine-grained steels, also for a reproducible production of filler metal by using an iron based powder either in the as condition or diluted with a boron free unalloyed iron powder as a raw material in the production of filler metals such as stick electrodes, agglomerated fluxes, flux cored wires, in that it contains boron within the limits 0.005% and 0.5%.

Welding aluminium (alloy) pieces - using low melting point aluminiyum alloy as filler metal

Abstract: Welding is effected under a flux comprising an intimate mixt. of compounds of potassium fluoroaluminate finely divided and essentially free of unreacted KF. The fluoraluminates contain KF and AlF3 in proportions 40-50:60-50 (by wt.). The weld metal is an aluminium alloy of lower m. pt. than either component to be joined. The weld metal is arranged between the parts to be joined with a layer of flux on top. Welding is then effected by heating to above the m. pt. of the flux and weld metal and below the m. pt. of the parts being joined.

Properties of welded joints in alloy 01420

Abstract: 1. Alloy 01420 has satisfactory weldability in argon arc welding. The filler material was wire of alloy AMg6. 2. Alloy 01420 is not susceptible to cracking during welding. Its high susceptibility to pore formation in welded joints is due to formation of a surface film during heating. 3. The strength coefficient of welded joints of alloy 01420 (argon arc welding) is 0.7 σb of the base metal immediately after welding and 0.9–1.0 σb after solutioning and aging. The corrosion resistance of the welded joints is satisfactory.