Topic
Shielded metal arc welding
About: Shielded metal arc welding is a research topic. Over the lifetime, 4462 publications have been published within this topic receiving 40560 citations. The topic is also known as: manual metal arc welding & flux shielded arc welding.
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Patent•
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16 May 1961
TL;DR: In this article, the authors describe a welding process in which an electrode of readily oxidized metal, e.g., aluminium, magnesium and their alloys, in a shield of non-oxidizing gas, is used to initiate the welding process.
Abstract: 876,379. Welding by fusion. BRITISH OXYGEN CO. Ltd. Nov. 2, 1959 [Nov. 13, 1958], No. 36574/58. Class 83 (4). In gas shielded metal arc welding using an electrode of readily oxidized metal, e.g. aluminium, magnesium and their alloys, in a shield of non-oxidizing gas, in which the arc is initiated by feeding the electrode into contact with the workpiece, appreciable oxidation of the electrode tip is caused to occur at the end of the welding period whilst the tip is so hot that further cooling produces a ridged surface on the tip. The process is particularly applicable to spot welding, the ridged surface facilitating striking of the arc. The oxidation is induced by focusing on to the tip of the electrode 4, heat from the weld pool by the use of a reflector 6 attached to the contact tube 5. In a modification, at the end of the welding period, an oxidizing gas, e.g. oxygen, air or carbon dioxide, is directed on to the electrode tip. The gas may be directed through the contact tube, a pipe coaxial with the contact tube or a separate pipe. Specification 839,661 is referred to.
16 citations
TL;DR: The research results make it possible to assess the influence of the type of wire and welding conditions on the emission volume and to compare chemical hazards generated during tubular cored wire welding with those typical for other arc welding processes.
Abstract: The emission of dusts and gases, which are generated during tubular cored wire welding and which are hazardous to health and the environment, were studied. Tests included various kinds of tubular electrode wires used for welding steel, that is, rutile flux cored wires, basic flux cored wires, and metal cored wires for welding unalloyed, low-alloy, and high-alloy steels as well as selfshielded flux cored wires used for welding low-alloy steels. The research results make it possible to assess the influence of the type of wire and welding conditions on the emission volume and to compare chemical hazards generated during tubular cored wire welding with those typical for other arc welding processes.
16 citations
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
TL;DR: In this article, the effects of a preheating treatment on the microstructural changes that occur in the heat-affected zone (HAZ) during multipass shielded metal arc welding of HY-80 steel have been studied.
16 citations