WO1996005935A2 - Procede, electrode et soudeuse permettant le depot d'un parement soude sur un element, et piece de moteur ou de machine pourvue dudit parement - Google Patents

Procede, electrode et soudeuse permettant le depot d'un parement soude sur un element, et piece de moteur ou de machine pourvue dudit parement Download PDF

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Publication number
WO1996005935A2
WO1996005935A2 PCT/DK1995/000329 DK9500329W WO9605935A2 WO 1996005935 A2 WO1996005935 A2 WO 1996005935A2 DK 9500329 W DK9500329 W DK 9500329W WO 9605935 A2 WO9605935 A2 WO 9605935A2
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WO
WIPO (PCT)
Prior art keywords
electrode
welding
strip
gas
facing
Prior art date
Application number
PCT/DK1995/000329
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English (en)
Other versions
WO1996005935A3 (fr
Inventor
Bent Thomasen
Original Assignee
Man B & W Diesel A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Man B & W Diesel A/S filed Critical Man B & W Diesel A/S
Priority to AU32199/95A priority Critical patent/AU3219995A/en
Publication of WO1996005935A2 publication Critical patent/WO1996005935A2/fr
Publication of WO1996005935A3 publication Critical patent/WO1996005935A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/044—Built-up welding on three-dimensional surfaces
    • B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors

Definitions

  • Method, electrode and welding apparatus for depositing a welded facing on a member and an engine or machine part provided with said facing.
  • the present invention relates to a method of depositing a welded facing on a member, such as a disc valve for a large internal combustion engine, an uncoated, strip-shaped electrode being fed and melted under gas shielding by means of a transferred open arc, the electrode being moved by means of a feed device at a substantially constant adjustable speed from a magazine, such as a spool with coiled electrode material, through a welding head with electric contact means and further towards the member on which the melted electrode material is deposited, a power source con- nected with the electric contact means supplying a welding current and shielding gas being supplied from gas means at the welding head.
  • a member such as a disc valve for a large internal combustion engine
  • GMAW Gas Metal Arc Welding, comprising both MIG and MAG welding
  • an electrode in the form of a wire of a diameter ranging between 0.6 mm and 1.6 mm is used.
  • the wire is fed continuously and is melted under gas shielding, where the shielding gas may, for example, be argon, C0 2 or mixtures thereof.
  • the GMAW method is normally used for joining of structural elements, but can also be used for welding a facing onto a member.
  • valve discs By means of MIG welding (Metal Inactive Gas welding) .
  • the valve discs are provided by welding with a heat-resistant facing consisting of Inconel 625 supplied in the form of an electrode wire of a diameter of 1.6 mm, using a shielding gas with 85 per cent argon and 15 per cent helium.
  • the melting rate at this method is just below 4 kg/hour.
  • a valve disc for a large two-stroke internal combustion engine has to have, for example, 22 kg of heat-resistant material welded on to achieve a desired facing thickness of 10 mm, the welding is a time-consuming process.
  • a more substantial disad- vantage of the known method is that the MIG welding results in a relatively deep and concentrated penetra ⁇ tion with a subsequent heavy dilution of up to 30 per cent with the base material. Owing to the dilution there is a risk that the welded facing may locally deviate so much from the desired composition that hot cracking may occur in the outermost layer.
  • the GMAW method also restricts the composition of the welded facing, as only few super-alloys with the desired high temperature properties can be drawn into wire shape.
  • Submerged-arc strip welding is another known method of depositing a welded facing on a member.
  • This method uses an uncoated consumable strip electrode being enveloped in the arc area by a protective powder which melts together into a protective layer of slag on top of the weld pool.
  • this method does not use shielding gas.
  • the method has an advantageously large melting rate, but is quite unsuitable for welding on members with edges as the powder drops off at the edges so that the weld pool is uncovered. Submerged-arc strip welding therefore cannot be used for depositing a welded facing near the periphery of a valve disc.
  • Submerged-arc plasma welding is another known method of depositing a welded facing on a member.
  • This method uses powdery filler material transmitted to the member in a plasma arc. The method results in little dilution only with the base material and can thus be used for welding of facings of a very high quality.
  • the filler material has to be atomized into spherical shape. Some elements cannot be atomized, but only crushed mechanically into flake shape, which sets a limit to the analysis of the welded facing.
  • the method also suffers from the disad ⁇ vantages that the melting rate is limited to about 3 kg/hour, and that the welding apparatus is complicated and very costly.
  • Russian inventor's certificate No. 966999 describes a method of welding strip material onto a member.
  • the strip material is here used as an electrode and is moved in an oscillating motion in relation to the member so that the point of contact between the strip electrode and the member is moved all the time, whereby melted metal is transmitted in micro-portions to the member at the point of contact.
  • This method uses point-by-point resistance welding without applying a shielding gas.
  • the resistance welding enables a material to be deposited at a voltage of only 11 volt and a current density of only 0.5-5 A/mm , which permits deposition of a very thin layer without any noticeable deformations of the member.
  • US patent No. 2,848,593 describes a method of the former type, and indicates that a strip electrode may be melted under gas shielding. All the examples in this patent concern submerged-arc strip welding, the strip electrode must have a thickness of at least 0.51 mm, a ratio between the strip width and the strip thickness
  • the object of the present invention is to facili ⁇ tate and improve manufacturing conditions for and/or the properties of disc valves for large internal combustion engines or similar engine or machine elements requiring the deposition of a heat resistant or a hard welded facing.
  • the above-mentioned method is characterized in that welding is performed at a current density in the range of 50 to 120 A/mm with a strip electrode, the strip width of which is at least 12 times larger than the strip thickness, and the material of which is melted in a spray arc or a short arc.
  • the uncoated strip electrode which is melted in a spray or short arc under gas shielding, for welding onto disc valves or similar members with edges or other jumps in the geometry.
  • the strip electrode provides an advantageously small and homogeneous dilution with the base material, and at the welding parameters indicated a very even penetration profile with consequent approxi ⁇ mately rectilinear transition between the base material and the welded facing.
  • the member is only exposed to a rather limited heat influ- ence, which renders the method particularly applicable for facing of small members, particularly members of an irregular geometry, such as disc valves which have an upright valve spindle on the back of the disc.
  • the method can be used with welding apparatuses that are substantially more simple and thus cheaper than the systems to be used for plasma arc welding.
  • facings of any analysis can be deposited using the method, because strip electrodes, as mentioned below in connection with another aspect of the inven- tion, can be manufactured mainly on the basis of desired properties of the finished facing and without taking into account whether the material has to be capable of being drawn into strip shape or be manufactured from an atomized starting material.
  • Welding can suitably be performed at a current
  • the current density is preferably not higher
  • the strip electrode is moved towards the member at a substantially constant speed and at a substantially constant angle, preferably in the interval from 80 to 100°. It has turned out that the best results are achieved when the strip electrode is at a right angle to the surface of the member, but near jumps in the member geometry, such as at corners, it may be necessary to set the electrode at an acute angle in relation to the member.
  • the invention relates to an electrode for use in the method.
  • the consumable electrode is characterized in comprising mechanically crushed powder sintered together into strip shape.
  • the electrode may be manufactured exclusively on the basis of mechanically crushed powder or from a mixture of mechanically crushed and atomized powder.
  • the composi ⁇ tion of the electrode at least partially from mechan ⁇ ically crushed powder renders it possible to manufacture electrodes from alloys which have not previously been capable of manufacture for commercial use in the facing of, for example, exhaust valves with a heat-resistant layer. It is thus possible to manufacture strip-shaped electrodes from the alloys Inconel 625, Inconel 671, Renee 220 or Stellite 6.
  • the alloy can be selected exclusively on the basis of the desired properties of the welded facing and without taking into consideration the welding process itself.
  • Such an option has not previously been available in the manufacture of, for example, exhaust valves, and this renders possible the manufacture of members with novel advantageous prop- erties.
  • the invention also relates to a welding apparatus for use in the above method and comprising an electrode magazine, such as a rotatably journalled spool with coiled electrode material, a feed device having drive means for feeding the uncoated strip-shaped electrode at an adjustable, substantially constant speed, a welding head with contact means which, for contact and control of the electrode, define a slot of a thickness corresponding to the strip thickness of the electrode, a power source which is connected with the contact means and via them can supply the electrode with a voltage and current so that welding can be performed with a transferred open arc between the electrode and a member to be provided with a welded facing, and a shielding gas source with at least one cup located at the welding head for guiding shielding gas towards the area around the arc and the melted electrode material.
  • an electrode magazine such as a rotatably journalled spool with coiled electrode material
  • a feed device having drive means for feeding the uncoated strip-shaped electrode at an adjustable, substantially constant speed
  • a welding head with contact means which
  • the welding apparatus is characterized in that the gas cup or gas cups discharge(s) shielding gas in an area which is oblong in the welding direction and extends furthest away from the strip electrode in a direction opposite to the welding direction.
  • the weld pool extends relatively far to the back of the arc area.
  • the rearwards oblong area with gas shielding protects the weld pool until it is suitably cooled, without the gas consumption becoming unsuitably large.
  • the quality of the weld and thus the properties of the finished member are ensured by means of the extended gas shielding, which also reduces the risk of edge defects in the weld bead and thus permits rapid laying of a partially overlapping neighbouring bead.
  • the manufacturing advantage thus provided is of particular importance at the welding on the bottom side of a disc valve where the weld bead can be applied in spiral shape.
  • the outlet opening of the gas cup is oblong in the welding direction, and it is positioned with the strip electrode located at the greatest distance from the rear edge of the cup.
  • at least two gas cups may be used, of which the first cup extends around the strip electrode and the second one is positioned behind the first one in the welding direction.
  • the two or more consecutive welding cups can each be provided with a smaller area than a single oblong cup, which may be an advantage if there is a draught around the operating point, but the gas shield covering the weld pool becomes less homogene- ous.
  • the gas cup contains an annular gas distributor nozzle.
  • the gas cup must necessarily have relatively large dimensions to provide the required gas shielding of the wide strip electrode and the large weld pool produced by welding with such an electrode.
  • the gas distributor nozzle limits the gas consumption and promotes an even discharge of gas over the full area of the gas cup, whether or not the cup is at an oblique angle in relation to the member.
  • the electrode may suitably have a cross-sectional
  • the strip thickness of the electrode is in the range of 0.35-0.5 mm.
  • the small strip thickness facilitates ignition of the arc and lowers the threshold current to obtain a material transmission in the arc consisting of fine droplets, i.e. a so-called spray arc.
  • the small strip thickness helps to keep the heat input to the member low in relation to the melting rate.
  • Strip thicknesses around 0.40 mm, such as from 0.37 to 0.43 mm, are particularly advantageous in case of sintered strips, which on one hand have good mechan ⁇ ical properties and on the other hand are so suitably thin that largely all the bonding agent used to combine the powder evaporates in the arc and in the weld pool before the melt solidifies.
  • the invention relates to an engine or machine part provided with a welded facing, particularly a disc valve for a large internal combustion engine with a heat-resistant welded facing on the disc bottom side and/or a welded hard facing in the seat area on the disc upper side, charac ⁇ terized in that the facing has been welded on using the above method and preferably also by means of the above welding apparatus.
  • the member manufactured by the method exhibits an extremely even transition between the welded facings and the base material, and very low dilution in the welded facing, which provides the part with superior operating properties in relation to prior-art parts with a welded facing.
  • the high melting rate further renders possible the deposition of a weld run of a large thickness, which contributes to the welded facing having the desired analysis at the outer side of the facing.
  • the part may have a welded facing having an analysis which has not so far been achievable.
  • typical parts may be mentioned disc valves and seat sections for valve housings for suction or exhaust valves in an internal combustion engine, valve parts for the off-shore industry, pressure rollers for industrial plants, pipe sections with an internal or external protective facing as well as shaft portions and wearing parts in an engine or a machine.
  • Fig. 1 shows a rough draft of an electrode feed system with associated welding head
  • Figs. 2 and 3 are partial sectional cuts in the longitudinal and transverse directions, respectively, through the welding head of Fig. 1,
  • Fig. 4 shows the welding head seen from below, and Fig. 5 is one half of the welding head.
  • FIG. 1 shows part of a welding apparatus 1 having an electrode magazine 2 in the form of a spool rotatably mounted on a central shaft end 3, which is mounted through a holder 4 on a supporting column 5 fastened by a fitting 6 on the upper side of a mounting unit 7.
  • the spool has two circular side pieces 8 arranged at a mutual distance, and a strip electrode 9 is coiled on the spool. For the sake of clarity, only one side piece 8 is shown. From the spool, the strip electrode is passed down into a feed device 10 with drive means for feeding the strip electrode, in the form of two rolls positioned on respective sides of the strip electrode.
  • One roll is fastened on a driving shaft positioned by a rolling bearing fastened on the mounting unit 7 and driven by a motor, such as a DC shunt motor which can rotate the shaft at a constant angular velocity despite varying load on the driving roll.
  • the speed of the driving motor is adjustable, for example by adjustment of the armature voltage of the shunt motor.
  • the periph ⁇ eral surface of the driving roll in contact with the strip electrode is provided with a friction-increasing coating or profile providing a sure grip on the strip so that it is fed at the peripheral speed of the driving roll without slipping.
  • the second roll 11 is a pressure roll supported by a shaft mounted in a U-shaped swinging part 12 which is swingably hinged to the mounting unit 7 at the top of its upward branches.
  • an adjustment knob 13 which presses the swinging part and thus the pressure roll 11 towards the driving roll against a spring bias. Because the strip electrode passes down between the two rolls, the force of contact of the rolls against the electrode can be adjusted by turning the adjustment knob 13, which also permits setting for different electrode thicknesses.
  • the strip electrode passes down through a link guide 14 consisting of two rod- shaped halves with an internal guide track which guides the strip electrode down to a burner head or welding head 15.
  • a link guide 14 consisting of two rod- shaped halves with an internal guide track which guides the strip electrode down to a burner head or welding head 15.
  • the upper end of the link guide is fastened to the mounting unit 7, and the welding head 15 is screwed onto the link guide at its lower end so that the mounting unit supports the welding head via the link guide.
  • the guide track in the rods may be designed with such an excess measure in relation to the electrode dimensions that one and the same link guide can be used for electrodes of different widths and thicknesses.
  • the feed device immediately on top of the welding head which can then be connected with the mounting unit via a separate console, but the design shown in the figure is preferred because owing to the distance to the welding head, the feed device is here protected against the high tempera ⁇ tures developed by the welding.
  • the mounting unit 7 is supported by a horizontal console 16 which is supported in a known manner, not shown in detail, by a frame standing on the floor and comprising a jig device for the member to be provided with a welded facing.
  • the figure shows the end of a disc valve 17, such as an exhaust valve for a large two- stroke main engine of a ship.
  • the spindle of the disc valve is fixed with its longitudinal axis being vertical in the jig device so that the bottom side 18 of the valve faces upwards toward the welding head.
  • the jig device rotates the disc valve in the direction of the arrow 19 at a speed which is so adapted to the position of the welding bead on the bottom side 18 that the relative speed between the welding head and the bottom side of the valve at the operating point is substantially constant, but adjust ⁇ able in dependency of the other welding parameters.
  • the welding head has to be positioned in relation to the member.
  • This may be done, for example, by an adjustment drive, not shown, a so- called tractor, either displacing the console 16 in the latter's transverse direction indicated by arrows 20 or in the longitudinal direction indicated by arrows 21, or displacing the mounting unit 7 in the longitudinal direction of the console, or swinging the console about a vertical axis 22 positioned at a distance from the member, or by combinations of such movements.
  • the setting movement of the welding head may be either continuous or discontinuous.
  • the jig device may be provided with a signalling device emitting at each full revolution of the member a control signal which produces a stepwise adjustment of the welding head.
  • the member is cylindrical and has to be faced on the outer side, it may be set up rotatably about a horizontal axis in the jig device, and the welding head may then during the facing be displaced in parallel with the longitudinal axis of the member.
  • the console 16 may furthermore be movable in the vertical direction as indicated by arrows 23 to permit setting of the welding head height above the member and to move the welding head between the active position and an inactive position where the member may be set up.
  • the welding head 15 is shown in a larger scale in Figs. 2-4 and comprises a central member 24 constructed from two halves 24a, 24b joined together by means of two fixing means, such as machine screws 25.
  • the halves are positioned in relation to each other by means of guide pins 26, 27 inserted in associated bores in the two halves.
  • the half 24b has an upright flange 28 allowing the welding head to be fastened to the link guide 14 through fastening means, such as two machine screws 29.
  • a recess 30 in the half 24a guides the strip electrode down between two electric contact means in the form of mutually facing plate-shaped contact parts 31, 32, of which part 31 is fastened in a recess at the bottom of the half 24b by means of a screw 33, and the part 32 is suspended via a groove about a projection 34 in a recess at the front end of the half 24a.
  • a spring 35 presses the contact part 32 towards the part 31, but can be moved away from it with simultaneous compression of the spring 35 when the strip electrode passes down between the contact parts.
  • the latter are provided with an oblique cut at the upper corner facing the recess 30. As the contact parts are pressed towards both sides of the strip electrode, they ensure good and stable power supply to it.
  • the power supply to the welding head is provided through an electric wire 36 carrying at its outer end a shoe indicated by 37, which is bolted on to the side of the central member 24 creating the current transmit- ting connection between the shoe and the contact parts.
  • the welding head is cooled by coolant supplied and drained away through conduits 38, 39 connected to respective sockets 40, 41 on the central member. Through cooling channels 42 in the halves 24a, 24b, the coolant is passed down into the area around the contact parts 31, 32.
  • the welding apparatus also comprises a shielding gas source which in a well-known manner comprises gas flasks, not shown, which pass gas at an adjustable delivery pressure and in a predetermined mixing ratio, if several types of gas are used, through a gas conduit 43 to an electrically controlled adjustment valve 44, which after fine adjustment of the gas pressure passes the gas through a gas hose 44' to a branch pipe 45 on the welding head.
  • the branch pipe 45 opens out into an annular gas chamber 46 surrounding the central member 24.
  • the housing 47 of the gas chamber supports a screen or cup 48 positioned around and extending down past the lower part of the central member.
  • the gas chamber 46 is defined downwards by an annular distributor plate 49, which, as shown in Fig. 4, is provided with many through holes for discharge of gas.
  • the gas chamber and the distributor plate together constitute a gas distributor nozzle ensuring even discharge of gas over all the annular area positioned between the central member and the cup.
  • the cup 48 is provided with a cooling pipe 51 (not shown in Fig. 4) , which is in flow communication with the cooling channels 42.
  • the cooling pipe may, for example, be soldered onto the cup, and this ensures the cup against damage from the strong heat development at the operating point.
  • the cup may be provided with internal cooling channels, being designed, for example, as a double-wall cup with internal guide plates for controlling the coolant flow.
  • the cup may be adjustable in the height in relation to the central member 24, for example by the central member having recesses 52 on its outer side located at various heights.
  • a locking pin 53 may be pressed into an associated recess 52 by mounting screws 54 so that the cup is fixed at the desired height on the central member 24.
  • the outlet opening delimited by the lower rim 55 of the gas cup is oblong in the welding direction and is positioned so that the strip electrode projecting from the contact parts 31, 32 at welding, has the greatest distance from the rear edge 56 of the cup.
  • the outlet opening may suitably have a width corresponding to double the electrode width and a length corresponding to about 8 times the electrode width.
  • Other width/length ratios are also possible, but the oblong outlet opening contributes to a limitation of the gas consumption, as the gas is only discharged where gas shielding is needed.
  • the wire 36 is connected in a known manner to a power source of a type well-known from GMAW welding with a wire electrode.
  • the power source may, for example, be a DC source with a flat or slightly drooping static characteristic and a maximum current of, for example 500-600 A.
  • the slightly drooping characteristic provides a possibility in a manner known per se of achieving a self-adjusting arc, the adjustment of which is based on the changes in the melting rate arising when the ohmic resistance of the arc is changed at variations in the arc length. If the length of the arc is increased, for example, the arc voltage rises, and the welding current drops, which reduces the melting rate until the length of the arc is again reduced to the predetermined value.
  • the self adjustment occurs rapidly and has proved advantageous for the establishment and maintenance of a stable arc at strip electrode welding under gas shielding. It is thus sufficient to set the constant feed speed of the strip electrode and the voltage supplied from the power source, the current automati ⁇ cally being adjusted in relation to the prevailing ohmic resistance in the arc.
  • the arc voltage may suitably be controlled within the interval of 23-45 V, and the current density be con-
  • the welding was performed on a circular disc-shaped member having a diameter of 25 cm and a thickness of 3 cm.
  • the disc was made of stainless steel of the type E 304.
  • the strip electrode was made of the material Inconel 625 and had a strip thickness of 0.5 mm and a strip width of 10 mm.
  • the shielding gas used was a mixture of 85 per cent argon and 15 per cent helium which was supplied at a flow amount of 27 1/min.
  • the negative pole of the power source was connected with the welding head and the positive pole with the member.
  • the welding head was positioned with the lower rim of the gas cup at a height of 10 mm above the member in a position so that the strip electrode formed an angle of 90° with the surface of the member.
  • a current of 420 A and an arc voltage of 29.2 V were used, and the strip electrode was fed at a speed of 3.14 m/sec. corresponding to a melting rate of 8.3 kg/hour.
  • the rotation of the disc was controlled so that the welding speed, i.e. the relative movement between the welding head and the member surface was 45 cm/min.
  • the welding head was controlled so as to provide an overlap of 7 mm between beads.
  • the welding bead produced turned out to have a width of 19 mm and a height of about 4 mm. A total of 4 layers were welded on with a total thickness of 15-16 mm.
  • the member was then cut through and ground in the usual manner. The penetration line proved to be largely horizontal, and no welding defects were observed. The test was repeated several times with the same result. During the welding, the arc was completely stable, and it was observed visually that the arc travelled back and forth across the full strip width.
  • the welding parameters may be adjusted in a manner known per se so that the welding of the first layer is performed by melting the electrode material in a short arc, where the drop rate is lower than in a spray arc. Although this reduces the melting rate, the dilution is also reduced, and particularly the heat supply to the member is reduced.
  • the power source may have a maximum current of 750-1000 A.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

Un élément (17) est pourvu d'un parement soudé grâce à un procédé consistant à débiter et faire fondre par soudage à l'arc sous atmosphère de gaz une électrode en ruban dont la largeur est d'au moins 12 fois supérieure à l'épaisseur. Le dispositif débiteur (10) fait descendre à vitesse constante et modulable l'électrode en ruban dans une tête de soudeuse (15) pourvue d'organes de contact (31, 32), le mouvement se réalisant en direction de l'élément. Une alimentation électrique délivre simultanément une tension et une intensité permettant à la substance d'électrode de fondre dans un arc de soudage avec fusion en pluie ou dans un arc court. La matière en fusion est protégée par un gaz alimenté par une rampe annulaire (46, 49) située dans une jupe à gaz (48), qui peut avantageusement présenter un orifice d'évacuation oblong respectant le sens de soudure. Le soudage s'effectuant selon une cadence de fusion de 8 kg/h, le procédé est particulièrement adapté au soudage de parements de protection sur des éléments à géométrie irrégulière tels que les têtes de soupapes (17) d'un moteur à combustion interne.
PCT/DK1995/000329 1994-08-16 1995-08-15 Procede, electrode et soudeuse permettant le depot d'un parement soude sur un element, et piece de moteur ou de machine pourvue dudit parement WO1996005935A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32199/95A AU3219995A (en) 1994-08-16 1995-08-15 Method, electrode and welding apparatus for depositing a welded facing on a member and an engine or machine part provided with said facing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0947/94 1994-08-16
DK94794A DK94794A (da) 1994-08-16 1994-08-16 Fremgangsmåde til belægning af et emne med et påsvejst lag, elektrode og svejseanlæg hertil samt et motor- eller maskinelement forsynet med et sådant lag

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WO1996005935A2 true WO1996005935A2 (fr) 1996-02-29
WO1996005935A3 WO1996005935A3 (fr) 1996-07-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004053757B4 (de) * 2004-06-09 2007-08-23 SCHWEIßTECHNISCHE LEHR- UND VERSUCHSANSTALT HALLE GMBH Auftragschweissverfahren mittels stromlosen pulverförmigen und stromführenden drahtförmigen Schweisszusatzes bei dessen diskontinuierlicher oder kontinuierlicher Zuführung zum Schweissbad
EP2881211A1 (fr) * 2013-12-05 2015-06-10 Voestalpine Böhler Welding Belgium S.A. Procédé de dépose d'un matériau de recouvrement sur une surface métallique au moyen de gainage de bande sous laitier, avec un flux comprenant plus de 55 % en poids de CaF2 ; Flux correspondant et article avec un tel matériau de recouvrement
US11179795B2 (en) 2018-10-11 2021-11-23 Arthur Wu Welding cup systems and methods

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
DE102004053757B4 (de) * 2004-06-09 2007-08-23 SCHWEIßTECHNISCHE LEHR- UND VERSUCHSANSTALT HALLE GMBH Auftragschweissverfahren mittels stromlosen pulverförmigen und stromführenden drahtförmigen Schweisszusatzes bei dessen diskontinuierlicher oder kontinuierlicher Zuführung zum Schweissbad
EP2881211A1 (fr) * 2013-12-05 2015-06-10 Voestalpine Böhler Welding Belgium S.A. Procédé de dépose d'un matériau de recouvrement sur une surface métallique au moyen de gainage de bande sous laitier, avec un flux comprenant plus de 55 % en poids de CaF2 ; Flux correspondant et article avec un tel matériau de recouvrement
WO2015082973A1 (fr) * 2013-12-05 2015-06-11 Voestalpine Böhler Welding Belgium S.A. Procédé de dépôt d'un matériau de recouvrement sur une surface métallique au moyen d'un revêtement pelable par refusion sous laitier avec un flux supérieur à 55 % en poids de caf2, flux correspondant et article pourvu du recouvrement
US11179795B2 (en) 2018-10-11 2021-11-23 Arthur Wu Welding cup systems and methods

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AU3219995A (en) 1996-03-14
DK94794A (da) 1996-02-17

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