Showing papers on "Shielded metal arc welding published in 1968"
Patent•
03 Apr 1968
TL;DR: In this paper, the authors proposed a caF2 metallic oxide slag system which provides a shielding action to the arc, plus as an essential ingredient(s), a compound of barium or strontium or both.
Abstract: Coredtype arc-welding steel electrode particularly intended for out-of-position welding wherein the ingredients in the core provide a pinch-effect type metal transfer at relatively low arc currents as well as a viscous slag which prevents the molten metal in the weld pool from being pulled out of the weld pool by the force of gravity. The ingredients making up the core provide a CaF2 metallic oxide slag system which provides a shielding action to the arc, plus as an essential ingredient(s), a compound of barium or strontium or both.
16 citations
Patent•
19 Feb 1968
15 citations
Patent•
25 Oct 1968
9 citations
Patent•
25 Mar 1968
TL;DR: A welding wire or welding rod is a metallic sheath composed of grains or granules of inorganic welding materials embedded in and bonded by a solidified matrix consisting of an inorganic anhydrous compound selected from the group comprising chromium oxides and boric oxide as discussed by the authors.
Abstract: A welding wire or welding rod comprising a metallic sheath composed of grains or granules of inorganic welding materials embedded in and bonded by a solidified matrix consisting of an inorganic anhydrous compound selected from the group comprising chromium oxides and boric oxide.
9 citations
TL;DR: To determine if ventilation requirements for the two processes should be different, solenoid valves set for inhalation and exhalation times observed in the normal adult male were used to simulate breathing by a plaster dummy head and one type of coated-rod electrode was used for comparison purposes.
Abstract: The purpose of the study was to compare gas-metal-arc welding with covered-electrode welding and to determine if ventilation requirements for the two processes should be different. Solenoid valves set for inhalation and exhalation times observed in the normal adult male were used to simulate breathing by a plaster dummy head. The plaster head, mounted on an automatic welding head carriage, moved parallel to the welding direction so that its position remained fixed relative to the welding arc. Air samples were taken concurrently inside and outside the helmet worn by the dummy during the welding process. Samples were analyzed for concentrations of iron oxide, nitrogen dioxide, ozone, fluorides, and carbon monoxide. Combinations of five wire electrodes, three of which were flux-cored, and five shielding gases were evaluated. One type of coated-rod electrode was used for comparison purposes.
Patent•
22 Jul 1968TL;DR: Welding electrode having an iron containing casing and a core containing calcium fluoride, titanium dioxide and potash feldspar as mentioned in this paper is a common type of metal-oxide core.
Abstract: Welding electrode having an iron containing casing and a core containing calcium fluoride, titanium dioxide and potash feldspar.
Patent•
03 Oct 1968
Patent•
11 Sep 1968
TL;DR: A welding electrode for hard surfacing steel parts consists of a low carbon steel tube cored with a mixture of a mixture containing ferrochrome, ferromolybdenum, ferrovanadium, ferrosilicon and ferromanganese.
Abstract: 1,181,940. Welding by fusion. INSTITUT ELEKTROSVARKI IMENI E.O. PATONA. 11 Sept., 1968, No. 43188/68. Heading B3R. Also in Division C7] A welding electrode for hard surfacing steel parts consists of a low carbon steel tube cored with a mixture containing ferrochrome, ferromolybdenum, ferrovanadium, ferrosilicon, ferromanganese, chromium metal, sodium silicofluoride and iron powder. Gas shielded or submerged arc welding is used. A core constituting 33-37% by weight of the electrode is composed of:- The electrode when used with the following submerged arc welding flux:- produced the following weld deposit:- The weld had a bainite structure. The steel workpiece was preheated to 350-380‹ C.
Patent•
09 Sep 1968TL;DR: In this article, the authors describe the effects of periodic variations of various system parameters on a 1/16-inch diameter steel electrode shielded by argon with a five percent oxygen addition.
Abstract: This paper describes the preliminary results of a long-term mathematical investigation of the dynamics of the consumable electrode (gas metal arc) arc-power supply system. In welding terminology, the consumable electrode process is referred to as the gas metal-arc or Mig process. In particular, the paper describes the effects of periodic variations of various system parameters on a 1/16-inch diameter steel electrode shielded by argon with a five percent oxygen addition.
18 Apr 1968
TL;DR: In this paper, the development and testing of a flux covered electrode suitable for welding 18% Ni-Co-Mo maraging steel is described, where a special flux has been developed to ensure low silicon pick-up in the weld bead, due to the reduction of silicates in the flux by titanium, and adequate titanium recovery.
Abstract: : The development and testing of a flux covered electrode suitable for welding 18% Ni-Co-Mo maraging steel is described. A special flux has been developed to ensure low silicon pick-up in the weld bead, due to the reduction of silicates in the flux by titanium, and adequate titanium recovery. Tensile and impact tests have been carried out on butt welds produced in 3/16 in. thick sheet and on all-weld-metal test pieces produced by butt welding 3/4 in. thick material. Ageing for 3 h at 480C. produced tensile strengths of 96.65 tonf per sq. in. with impact values of about 10 ft-lb. From side fillet welds shear strengths approximately 0.4 of the tensile strength were obtained. Extensive radiography shows that sound welds can be produced over the range of thicknesses investigated. Adjustments in the core wire composition to obtain an electrode more suitable for use with the 90 tonf per sq. in. grade of maraging steel are suggested. (Author)
Patent•
03 Oct 1968