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    Improvements in means and method of welding
    41.
    发明专利
    Improvements in means and method of welding 未知

    公开(公告)号：GB646777A

    公开(公告)日：1950-11-29

    申请号：GB466546

    申请日：1946-02-14

    Applicant: TITANIUM ALLOY MFG CO ,  ARCOS CORP

    IPC: B23K35/30

    Abstract: A method of making titanium available in the weld from a ferrous alloy welding rod comprises coating a ferrous alloy welding rod with a flux coating containing from 10 to 40 per cent by weight of a powdered single alloy consisting of 9-51 per cent Ti and 20-64 per cent of one or more of the elements Li, K, Sr, Ba, Ca, Na, Mg, Al and Be, the balance of the alloy, if any, being iron, and producing a ferrous alloy weld deposit by employing this coated wire as an electrode in electric arc welding. The powdered single alloy may include 5-33 per cent Ni or up to 10 per cent Cr or up to 3 per cent each of Si, Mn and Cu. The core wire may be one containing Cr, e.g. in the form of stainless steel, and it may p include a proportion of Ti, e.g. 0.3-0.6 per cent, or one of the alkali or alkaline earth metals or Al. The powdered alloy preferably has a particle size below 60 mesh per linear inch. A weld deposit produced according to the invention may have the composition Cr 16-21 per cent, Ni 7-12 per cent, Mn 0.3-3 per cent, Si 0.3-3 per cent, Cu 0.3-3 per cent, C 0.01-0.2 per cent, at least four and one half times as much Ti as C, and the balance Fe. The aluminium containing alloy may be made by an aluminothermic process, the aluminium content being provided by use of an excess of aluminium. One example of a suitable aluminothermic mixture is chromiumbearing beach sand containing 41.6 per cent TiO2, 25.6 per cent Fe2O3, 14.1 per cent Cr2O3, 28 pounds, rutile 8 pounds, fluorspar 1 pound, nickel oxide 3 pounds, grained aluminium 25 pounds, aluminium pellets 13 pounds, NaNo3 9 pounds and NaClO3 5 pounds.

    Improvements in overlay welding
    44.
    发明专利
    Improvements in overlay welding 未知

    公开(公告)号：GB1131031A

    公开(公告)日：1968-10-16

    申请号：GB4178065

    申请日：1965-10-01

    Applicant: ARCOS CORP

    IPC: B23K9/04 ,  B23K35/02

    Abstract: 1,131,031. Welding by fusion. ARCOS CORP. 1 Oct., 1965 [2 Dec., 1964; 24 June, 1965 (2)], No. 41780/65. Heading B3R. [Also in Division C7] In overlay welding on a base-plate, each bead is formed by the fusion of the edge of an adjacent bead, the upper surface of the base-plate, a barrier in the form of a layer of powder or a strip of metal deposited on the base-plate near the adjacent bead, and a consumable strip electrode located generally transverse to the welding direction. In this way a plain carbon or low alloy steel plate may be coated with a plain carbon or a chromium nickel stainless steel, a nickel alloy, e.g. 76% Ni, 16% Cr, 8% Fe or 67% Ni, 30% Cu, copper or cobalt alloy. The barrier serves to reduce dilution of the overlay. The strip electrode may be skewed in either direction, and is ¢ to say 12 inches wide and 0À02-0À25 inch thick. A barrier strip may be of similar dimensions and may be fed at the same or a faster rate than welding speed and have one edge flanged. The barrier strip may be spot or seam welded to the base or may be adhered by coating the base with 7% nitrocellulose and 3% aluminium in butyl acetate or a mixture of ethyl acetate and toluol, which coating serves as a deoxidizer, or by using an adhesive flux coating consisting of one of boric acid, ammonium chloride or lithium chloride in a solvent of water or alcohol. Where the baseplate is a high carbon steel the surface is decarburized by heating in wet hydrogen at 1200- 1400‹ F., by flame treating to scale the surface with iron oxide or by adhering the barrier strip using a decarburizing flux, e.g. 10% Cr 2 O 3 , 10% Fe 3 O 4 in sodium silicate solution and baking prior to welding. A photo-electric cell may be used to indicate if the gap between the barrier and the adjacent bead is excessive, and the process may be stopped automatically if the barrier ceases to be fed. Other adhesive fluxes that may be used are aluminium or magnesium powder; 95% calcium fluoride, 5% manganese; 98% calcium fluoride, 2% aluminium; with in each case a binder of sodium silicate. Submerged arc welding may be used with deposition of granular flux of the same or different composition in front of and behind the electrode. Alternatively arc welding using as a shielding gas carbon dioxide, argon or helium, may be used, with no flux or with flux in one or both of the electrode and the barrier. An overlay of 0.049% C, 0À89% Mn, 0.85% Si, 18.02% Cr, 9.4% Ni, balance Fe is produced using a powder barrier of 0.019% C, 0À65% Si, 18.15% Cr, 10.10% Ni, balance Fe, an electrode of 0.035% C, 1.14% Mn, 0.68% Si, 18À21% Cr, 9.53% Ni, balance Fe and the following submerged arc flux, 25% fluorspar, 15% aluminium silicate, 2% clay, 3% Mn, 6% Cr, 1% Al and a sodium silicate binder. A hard surface of 0.3% C, 5.4% Mo, 2.7% Ni, 24% Cr, 58% Co, balance substantially Fe is produced using a cobalt electrode a powder barrier of 24 parts Cr, 3 parts high (10%) carbon Cr, 3 parts Ni, 6 parts Mo and the above submerged arc flux. The barrier powder may be fed from a plurality of valve controlled sources. The barrier is usually thicker than the electrode. The welding supply may be A.C. or D.C. of either polarity. The electrode and/or the barrier may be compacted or sintered powder which includes flux, or may be a plain metal strip or a strip with a layer of such powder or a sandwich with the powder compact in the centre. The metal strip may be fluxcored. In a machine for automatically welding with a powder barrier, the barrier 66 5 , Fig. 35, is deposited from a hopper and levelled by a scraping plate. Granular flux is deposited behind the scraping plate and also from a nozzle 94 behind the strip electrode 56. The electrode is fed by rolls and guided by edge rolls 61 to a contact device comprising spaced steel members 70, 71 and an intervening copper shoe 72 on one side and a steel member 69 on the other side. The shoe 72 is mounted on the upper member 70 and is spring-loaded. The feeding and contact arrangement is adjustable about a vertical axis. In a modification for overlaying the inside of a cylinder, the machine is mounted on a boom 40 1 , Fig. 1a, and carries a reel 66 2 of barrier strip 66 and a spring-loaded roller 106 or guide fingers for pressing the strip 66 against the base-plate. The axis of the cylinder is tilted at ¢-10 degrees so that the weld pool tends to run to the adjacent bead, and welding takes place at a location spaced “-3 degrees back from the vertical plane. Where shielding gas is used it is fed from a nozzle adjacent the electrode or into an enclosure surrounding the weld zone. The work or the machine may be stationary.

    45.
    发明专利
    未知

    公开(公告)号：FR1453723A

    公开(公告)日：1966-06-03

    申请号：FR38428

    申请日：1965-11-15

    Applicant: ARCOS CORP

    IPC: B23K9/04 ,  B23K35/02

    47.
    发明专利
    未知

    公开(公告)号：AT276906B

    公开(公告)日：1969-12-10

    申请号：AT1081465

    申请日：1965-12-01

    Applicant: ARCOS CORP

    IPC: B23K9/04

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