Abstract: Flux-cored wire as mentioned below, in which a sheath of steel strip is filled with a powder, a selection of iron powders or earth carbonates or fluorides and ferro-metallic deoxidizers and arc stabilizers are added and the mixture is baked at about 570.degree. to 620.degree. C, specific compositions as detailed in the description being used in the powder, the powder specifically having added to it 1 to 3% by weight of powder of atomized silicate, and the sheath being of low-carbon or low-alloy steel, the whole being sifted preferably at 100 mesh.
Type:
Grant
Filed:
February 23, 1977
Date of Patent:
August 22, 1978
Assignee:
La Soudure Electrique Autogene, Procedes Arcos
Abstract: A prefused basic flux composition comprising:______________________________________ SiO.sub.2 about 25 to about 35% Al.sub.2 O.sub.3 about 2 to about 6% TiO.sub.2 about 3 to about 7% CaF.sub.2 about 5 to about 11.25% CaO about 44 to about 52% MgO about 1 to about 10% MnO about 0.5 to about 5% Na.sub.2 O about 4.5 to about 8% K.sub.2 O about 0.5 to about 1.5% FeO 0 to about 2% ______________________________________And wherein the weight ratio of CaO to CaF.sub.2 is equal to or greater than about 4.
Type:
Grant
Filed:
December 13, 1976
Date of Patent:
January 3, 1978
Assignee:
La Soudure Electrique Autogene, Procedes Arcos, S.A.
Abstract: Flux for welding ordinary, semi-alloyed, alloyed or special steels with a high rate of efficiency and high rate of speed and containing a relatively high amount of Fe powder.
Type:
Grant
Filed:
April 13, 1976
Date of Patent:
July 19, 1977
Assignee:
La Soudure Electrique Autogene, Procedes Arcos, S.A.
Abstract: In flux-cored wire electrodes for vertical automatic welding, from bottom to top, there is an electric arc under gaseous protection, the wires having diameters of 1 to 4 mm and generally shaped internally in any configuration, such as tubular, heart-shaped and composite, characterized by a sheath of steel strip, and a powdered filling flux most preferably including the following ingredients in qualitative and quantitative composition by powder weight:______________________________________ Iron powder 73% Silicofluoride of potassium (K.sub.2 SiF.sub.6) 4% Cryolite (Na.sub.3 AlF.sub.6) 2% Nickel powder 3% Ferro-molybdenum (at 65 up to 75%) 0.8% Refined ferromanganese (85 up to 90%) 9.9% Ferrosilicon (45%) 1% Ferrotitanium (30%) 0.5% Micaceous iron oxide 1% Fine silica 4% Silicocalcium (SiCa) 0.8% 100.0% ______________________________________The flux-cored wires most preferably have a filling coefficient of 32 grams of powder weight per 100 grams of strip.
Type:
Grant
Filed:
August 29, 1975
Date of Patent:
May 3, 1977
Assignee:
La Soudure Electrique Autogene, Procedes Arcos
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.
Type:
Grant
Filed:
June 17, 1975
Date of Patent:
April 5, 1977
Assignee:
La Soudure Electrique Autogene, Procedes Arcos
Abstract: A striking process for a plasma beam at high temperature which includes an enclosure between two torches located at opposite sides of the enclosure and outside the enclosure, a stick-electrode introduced lengthwise through a window of one of the torches and brought near the opposite torch until the plasma flame hooks to the stick-electrode, thereby closing between the nozzle and the stick-electrode the circuit of a superimposed current, then pulling the stick-electrode progressively from the enclosure, carrying with it the plasma beam until it meets a second torch which is energized at the very moment of extraction of the stick-electrode, and then disconnecting the stick and closing the laminar plasma flow circuit.
Type:
Grant
Filed:
September 3, 1974
Date of Patent:
February 10, 1976
Assignee:
La Soudure Electrique Autogene, Procedes Arcos
Inventors:
Jean Albert Sunnen, Henry Rene Schoumaker
Abstract: Arc welding and overlaying, particularly with strip electrodes, and particularly for overlaying by the submerged arc welding process with strip electrodes, can be regulated as to the distribution of arc energy by using strip electrodes which are run through male and female gears so that the current input of the electrodes is adjusted as to uniformity across the width of the overlay path.
Type:
Grant
Filed:
April 5, 1974
Date of Patent:
February 3, 1976
Assignee:
La Soudure Electrique Autogene, Procedes Arcos