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22 results about "Electroslag welding" patented technology
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Electroslag welding (ESW) is a highly productive, single pass welding process for thick (greater than 25 mm up to about 300 mm) materials in a vertical or close to vertical position. (ESW) is similar to electrogas welding, but the main difference is the arc starts in a different location. An electric arc is initially struck by wire that is fed into the desired weld location and then flux is added. Additional flux is added until the molten slag, reaching the tip of the electrode, extinguishes the arc. The wire is then continually fed through a consumable guide tube (can oscillate if desired) into the surfaces of the metal workpieces and the filler metal are then melted using the electrical resistance of the molten slag to cause coalescence. The wire and tube then move up along the workpiece while a copper retaining shoe that was put into place before starting (can be water-cooled if desired) is used to keep the weld between the plates that are being welded. Electroslag welding is used mainly to join low carbon steel plates and/or sections that are very thick. It can also be used on structural steel if certain precautions are observed, and for large cross-section aluminium busbars. This process uses a direct current (DC) voltage usually ranging from about 600 A and 40-50 V, higher currents are needed for thicker materials. Because the arc is extinguished, this is not an arc process.
Electroslag welding apparatus and electroslag welding method
To perform excellent welding by suppressing the occurrence of defective penetration when performing electroslag welding with two electrodes of the same polarity.SOLUTION: The electroslag welder 1 includes two weld torches 7 having the same polarity, a swing mechanism that horizontally swings both of the two weld torches 7 at the same time with the two weld torches 7 spaced apart from each other, and an adjustment mechanism that can adjust the distances from the lower ends of contact tips 8 of the two weld torches 7 to the surface of molten slag 10 to 20 to 150mm. The respective weld torches 7 are arranged in such a manner that the distances between the wires on the surface of the molten slag 10 of the two weld wires 9 fed from the respective two weld torches 7 at the time of the weld are equal to or below the 40mm.SELECTED DRAWING: Figure 1
Owner:NIPPON STEEL WELDING & ENGINEERING CO LTD
Full-section plate-level electroslag welding automatic slag system and control method thereof
The invention discloses a full-section plate-level electroslag welding automatic slag system and a control method thereof, and relates to the technical field of plate-level electroslag welding, and the method comprises a carbon rod, a carbon rod driving assembly, a crucible, a crucible driving assembly, a slag melting transformer and a controller; the slagging transformer is connected with the crucible and the carbon rod, the carbon rod is connected with the carbon rod driving assembly, and the crucible is connected with the crucible driving assembly; the controller is connected with the carbon rod driving assembly and the crucible driving assembly; the controller is used for controlling the carbon rod driving assembly to move the carbon rod to a preset position within a preset lifting speed after the slagging transformer stops running; in the process that the carbon rod reaches the preset position, the crucible driving assembly is controlled to drive the crucible to turn over according to the preset turning speed, the process that the carbon rod is lifted to the preset position at the preset lifting speed and the process that the crucible is turned over at the preset turning speed are synchronously started, and the carbon rod and the crucible are free of mechanical collision in the moving process. The production efficiency can be effectively improved.
Owner:INNER MONGOLIA SHIXING NEW MATERIAL TECH CO LTD
A narrow-band electroslag welding auxiliary device for large connecting pipes of petrochemical heat exchanger tube box
An auxiliary device for narrow-strip electroslag welding of large-diameter tube fittings in petrochemical heat exchanger tube boxes is disclosed. This invention relates to the field of petrochemical heat exchanger tube boxes. Existing argon arc welding methods suffer from low deposition efficiency and require meticulous point-by-point, layer-by-layer operations, resulting in long welding times for individual tube fittings. This invention comprises an auxiliary roller, a tube box fitting, a transition connector, and a rotating roller frame. The auxiliary roller is mounted on the roller of the rotating roller frame, which drives the auxiliary roller to rotate. The tube box fitting is installed inside the auxiliary roller, and the transition connector is installed on the inner wall of the auxiliary roller, with its tail fixedly connected to the inner wall of the auxiliary roller and its head connected to the tube box fitting. By rotating the tube box fitting driven by the auxiliary roller and transition connector, narrow-strip electroslag welding of large-diameter tube box fittings or small-diameter cylinders is achieved, improving welding efficiency. This invention is applied in the field of petrochemical heat exchanger tube box welding.
Owner:HARBIN BOILER CO LTD
System and process for electroslag additive manufacturing
A method of forming a component using electroslag additive manufacturing includes supporting a base member for rotation about a longitudinal axis defined by the base member. The method also includes positioning an electroslag welding apparatus adjacent the base member, operating the electroslag welding apparatus, and rotating the base member about the longitudinal axis while operating the electroslag welding apparatus. The method also includes translating the electroslag welding apparatus along a first length of the base member while operating the electroslag welding apparatus and depositing with the electroslag welding apparatus a layer of material at a rate between 20 kg / hour and 300 kg / hour completely around the base member along the first length. The method also includes forming a disk on one of the layer of material and the base member by performing the steps of positioning the electroslag welding apparatus at a predetermined position along the longitudinal axis, rotating the base member about the longitudinal axis while operating the electroslag welding apparatus, and depositing with the electroslag welding apparatus sequential layers of material on top of one another at a rate between 20 kg / hour and 300 kg / hour completely around the base member until an outer most layer exceeds a predetermined diameter.
Owner:SIEMENS ENERGY GLOBAL GMBH & CO KG +1
Electroslag welding flux and electroslag welding-flux cored tire
PendingJP2025134520AWelding/cutting media/materialsProcess efficiency improvementHeat-affected zoneElectroslag welding
To provide an electroslag welding flux that can increase toughness of a weld metal part and an HAZ part while maintaining good bead shape.SOLUTION: An electroslag welding flux comprises by mass% to a total mass: SiO2 of 20 to 30%; CaO of 15 to 40%; MnO of 10 to 30%; MgO of 5 to 15%; Al2O3 of 5 to 20%; CaF2 of 3 to 10%; TiO2 of 0.5 to 4%; a total of FeO and FeO conversion value of metal Fe of 0.1 to 3%; a total of NiO and a NiO conversion value of metal Ni of 0 to 2%; B2O3 of 0 to 2%; BaO of 0 to 0.1%; Na2O of 0 to 0.1%; K2O of 0 to 0.1%; Li2O of 0 to 0.1%; ZrO2 of 0 to 0.1%; oxides other than the above of 0 to 5% in total; fluorides other than the above of 0 to 3% in total; carbonates of 0 to 0.5% in total; and the reminder comprising impurities.SELECTED DRAWING: None
Owner:NIPPON STEEL WELDING & ENGINEERING CO LTD
Electroslag welding apparatus and method of welding
This invention provides an electroslag welding apparatus and a welding method thereof. The electroslag welding apparatus includes a workpiece body and a power source. A slag pool is disposed within the workpiece body, and a molten pool is disposed below the slag pool. Metal slag in the slag pool accumulates below the molten pool after passing through it, forming a weld. A liquid-cooled forming slider is disposed around the periphery of the molten pool. The height of the molten pool increases with the accumulation of the weld, and the height of the liquid-cooled forming slider also increases with the molten pool. Furthermore, a first conductive path is provided between the slag pool and the positive electrode of the power source, a second conductive path is provided between the weld and the negative electrode of the power source, and a third conductive path is provided between the liquid-cooled forming slider and the negative electrode. The electroslag welding apparatus provided by this invention can solve the problem of poor weld formation quality in the prior art.
Owner:MCC (SHANGHAI) STEEL STRUCTURE TECHNOLOGY CORP LTD
Method for assembling box beams / columns and assembled structure
ActiveCN116833608BWelding/cutting auxillary devicesAuxillary welding devicesSlag (welding)Electroslag welding
The present application relates to a kind of box beam / column's assembly welding method and assembly welding structure, the method is: after main body workpiece is assembled together, concentrate on the welding of workpiece, box shape assembly: lower wing plate is fixed as bottom plate;Install baffle on lower wing plate;Assemble left web plate and right web plate;Assemble upper wing plate;Box shape welding: welding machine enters from the welding hole of upper wing plate, and the welding of each baffle and left, right web plate is carried out electric slag welding;Component is turned over 90 degrees, and welding machine enters from the welding opening of web plate side, and the welding of each baffle and upper, lower wing plate is carried out electric slag welding;Finally, the welding of four longitudinal welds of box shape outside;The structure is: baffle all is electric slag welding weld around;Upper wing plate is provided with welding hole corresponding to first weld, and first weld is continued to the surface of upper wing plate welding hole from lower wing plate;Left web plate / right web plate two sides are provided with welding opening corresponding to second weld, and second weld is connected with the longitudinal weld of left web plate / right web plate two sides.
Owner:HANGXIAO STEEL STRUCTURE (HEBEI) CONSTRUCTION CO LTD
Method, control device, welding system and storage medium for controlling electroslag welding or electro-gas welding
The coefficient information is determined based on a parameter specified for a project included in construction information of the project including a welding method and a welding material, the projects of welding conditions in welding include at least a welding current, a wire feeding speed, and a projection length, a reference value for a project of the welding conditions that is not specified is calculated based on a set value specified for at least two of the projects of the welding conditions and the determined coefficient information, and a control amount for the project of the welding conditions that is not specified is calculated based on the reference value.
Owner:KOBE STEEL LTD
Slag leakage prevention assembly for electroslag welding
ActiveCN224157929UWelding/cutting auxillary devicesAuxillary welding devicesSlag (welding)Electroslag welding
The utility model aims at providing an electroslag welding slag leakage prevention assembly which is characterized by comprising a partition plate, a first baffle and a second baffle, the first baffle and the second baffle are fixedly connected to the two sides of the partition plate respectively and extend out of the edge of the same side of the partition plate, and the side end face, located between the first baffle and the second baffle, of the partition plate is a welding face. The welding surface and two opposite side surfaces of the first baffle plate and the second baffle plate form a melting groove; the first baffle and the second baffle each comprise a joint face parallel to the welding face and in the same direction, and a plurality of containing through grooves which are different in depth and penetrate in the length directions of the containing through grooves are formed in the two joint faces. The slag leakage prevention assembly further comprises filler which is made of flexible fireproof materials and can be placed in the containing groove, and the top of the filler is higher than the joint face after the filler is placed. By means of the mode that the containing through grooves with the different depths are formed in the joint face of the baffle and matched with the filler, the assembling gaps with the variable sizes are filled, and therefore slag leakage is avoided, and meanwhile the welding effect can be improved.
Owner:ZHEJIANG DADONGWU CONSTR TECH CO LTD
Flux for electroslag welding and electroslag welding method
ActiveUS12558745B2Welding/cutting media/materialsSoldering mediaElectroslag weldingPhysical chemistry
A flux for electroslag welding used for electroslag welding may include a basic oxide, an amphoteric oxide, an acidic oxide, and a fluoride. With respect to a total mass of the flux, the basic oxide may include 5.1 mass % or more and 30.0 mass % or less of CaO, the acidic oxide includes 17 mass % or less of SiO2, and the fluoride includes 35 mass % or more and 73 mass % or less of CaF2. A content of the CaO is 30 mass % or more with respect to a total mass of the basic oxide, a content of the SiO2 is 80 mass % or more with respect to a total mass of the acidic oxide, a content of the CaF2 is 80 mass % or more with respect to a total mass of the fluoride, and a value of (2×[CaF2]+[CaO]) / [SiO2] is 5 or more and 56 or less.
Owner:KOBE STEEL LTD
Energy-saving and environment-friendly thick partition plate single-wire electroslag welding parameter dynamic regulation and control method
PendingCN120516162AMeasurement devicesWelding/cutting auxillary devicesSlag (welding)Electrical resistance and conductance
The invention relates to the field of electroslag welding, in particular to an energy-saving and environment-friendly thick partition plate single-wire electroslag welding parameter dynamic regulation and control method, and solves the problem that current energy consumption is increased due to the fact that current power is kept unchanged and cannot be regulated according to the welding process when electroslag welding is carried out. According to the energy-saving and environment-friendly thick partition plate single-wire electroslag welding parameter dynamic regulation and control method, a control terminal and a conductive supporting seat are included, baffle adjusting structures are installed on the front portion and the rear portion of the conductive supporting seat correspondingly, four ultrasonic probes are installed on the outer sides of the baffle adjusting structures, and a first wire is fixed to one end of the conductive supporting seat; a resistance sensor is fixed to the end, connected with the conductive supporting base, of the first wire. The ultrasonic probe and the resistance sensor are used for monitoring the crystal structure of molten welding slag and the resistance change in a circuit during welding correspondingly, so that current parameters during welding are regulated and controlled in real time, and the welding efficiency of electroslag welding and the quality after welding are improved.
Owner:HUZHOU JIULI STEEL STRUCTURE NEW MATERIAL CO LTD
Welding flux composition for electroslag welding and electroslag welding method
The invention relates to the technical field of electroslag welding, in particular to a welding flux composition for electroslag welding, which comprises the following components in percentage by weight: 40 to 60 percent of heat conduction component, 10 to 30 percent of infiltration component, 5 to 20 percent of welded part powder, 5 to 15 percent of foaming component and 5 to 10 percent of polymer glue. According to the welding flux composition, the electric energy consumption in the welding process is effectively reduced, and the high-temperature treatment time is shortened, so that the problem of grain coarsening of a welding seam and a heat affected zone is relieved. And meanwhile, the welding flux has good wettability on the surface of carbon steel at high temperature, sufficient filling and tight combination of a welding seam are ensured, and the toughness and impact resistance of a welding joint are further improved.
Owner:SHANDONG SOLID SOLDER CO LTD
Welding device suitable for box column
InactiveCN120395105AWelding/cutting auxillary devicesAuxillary welding devicesThermodynamicsElectroslag welding
A welding device suitable for a box type column comprises a heat conduction device and a platform, the heat conduction device is arranged on the lower portion of the platform, and the platform is arranged on any side of the box type column. The heat conduction device is used for transferring redundant heat on side plates on the two sides of a box type column during electroslag welding and comprises an upper side plate heat conduction assembly and a side plate heat conduction assembly, and one upper side plate heat conduction assembly and one side plate heat conduction assembly are placed on the left side of an electroslag welding wire. The other group of upper edge plate heat conduction assembly and side edge plate heat conduction assembly are placed on the right side of the electroslag welding wire, the upper edge plate heat conduction assembly is arranged on the upper portion of the side edge plate heat conduction assembly, and the upper edge plate heat conduction assembly and the side edge plate heat conduction assembly are connected through a flexible connecting pipe; and a large amount of heat during welding can be taken away through the heat conduction device, so that when the box-shaped column is welded, the situation that the strength of the box-shaped column cannot meet the requirement of a bearing structure due to thermal deformation of the side plate at the welding position or change of the physical property of the side plate caused by generation of a large amount of heat is avoided.
Owner:XUZHOU JIEWEI NEW MATERIAL TECH CO LTD
Construction method for box column partition adopting single-side electroslag welding
The present application relates to steel structure welding process technical field, specifically disclose a kind of construction method of box column partition plate adopts single-sided electroslag welding welding, 1) blanking: cutting partition plate and baffle;2) groove processing: groove a1 of one kind is CO2 gas shielded welding, another is groove a2 of electroslag welding in partition plate edge processing;3) assembly: first partition plate and baffle are assembled together;4) partition plate welding: CO2 gas shielded welding is used to connect weld of partition plate and lower wing plate, left web plate, right web plate, after welding, assembly upper wing plate;5) bottoming and filling welding: CO2 gas shielded welding is used to bottoming filling welding of wing plate and web plate connecting weld;6) electroslag welding: electroslag welding weld is generated at the junction of partition plate and upper wing plate;7) cap welding: remove arc and arc high part, repair welding electroslag welding hole both sides reserved part;The present application can guarantee the quality inside weld, and also reduce construction cost, improve work efficiency.
Owner:LAIWU IRON & STEEL GRP CONSTR & INSTALLATION ENG CO LTD
Machining and manufacturing method for box-type rotating steel pipe column
The invention relates to a processing and manufacturing method of a box-type rotary steel pipe column, which comprises the following steps of: 1, manufacturing a steel pipe structure, namely assembling a vertical cross-shaped stiffener, a conversion plate and an inner partition plate, and slotting the outer wall of a steel pipe to realize the connection of the cross-shaped stiffener and the steel pipe; 2, manufacturing a cross-shaped stiffening box-type web structure: assembling a vertical cross-shaped stiffening, a partition plate and a box-type column web, and completing welding; 3, the steel columns are integrally connected, specifically, the cross stiffeners, the web parts of the box body and the lower steel pipes are assembled into a whole, and welding is completed; and fourthly, welding the inner partition plate and the main welding seams of the box type structure, wherein electroslag welding of the inner partition plate and the box body cover plate and welding of the four main welding seams of the box body are completed. By formulating the advanced, scientific and reasonable assembling and welding sequence and method, accurate assembly of components and efficient welding of all welding seams are achieved, and therefore the production cost is reduced, the machining efficiency is improved, and innovative development of the whole steel structure and even the building field is promoted.
Owner:MCC (SHANGHAI) STEEL STRUCTURE TECHNOLOGY CORP LTD
Manufacturing process of a cask for spent nuclear fuel and a cask manufactured using the process
PCT designated stageWO2026008092A1Nuclear energy generationArc welding apparatusElectroslag weldingProcess manufacturing
Manufacturing process of a cask for a storage of spent nuclear fuel and / or other nuclear waste, during which at least two parts of the cask body comprising at least a cylindrical shell part (2) of the cask body and a bottom part (3) of the cask body with a round bottom are created separately and, after that, the cask is created by welding these parts of the body together. The cylindrical shell part (2) is placed in a positioning device to be rotated around its central axis and, after that cladding beads of a corrosion-resistant CrNi material with a highly basic agglomerated flux are laid onto its inner surface by means of an electroslag welding method. The bottom part (3) of the cask body comprising at least a round bottom (4) of the cask (1) is placed in the positioning device for laying cladding beads by means of the electroslag welding method onto this round bottom (4), the cladding beads are laid onto the round bottom (4) by an electroslag welding using a corrosion-resistant OrNi material with a highly basic agglomerated flux. Cask manufactured according to the process comprises a cylindrical shell part (2) and a bottom part (3) which define a storage space, wherein an inner surface (5) of the cylindrical shell part (2) and of the bottom part (3) is provided with an electroslag cladding from at least one strip-type corrosion-resistant CrNi material and highly basic agglomerated flux.
Owner:SKODA JS AS
Dual twin-saw wire cladding
A system and method for dual-twin SAW cladding is disclosed. The method includes arranging a first twin SAW head in close proximity to a second twin SAW head, delivering electroslag flux to a surface of a workpiece to create a layer of electroslag flux atop the workpiece, directing two first consumable wires through the first twin SAW head towards the surface of the workpiece, directing two second consumable wires through the second twin SAW head towards the surface of the workpiece, introducing the two first consumable wires and the two second consumable wires into a molten slag pool formed on the surface of the workpiece to melt the two first consumable wires and the two second consumable wires via resistive heating, and translating the first twin SAW head and the second twin SAW head together to form a cladded deposit on the workpiece.
Owner:ESAB AB
Hybrid wire and slag-based additive manufacturing
PendingUS20260027622A1Additive manufacturing apparatusArc welding apparatusSlag (welding)Electroslag welding
A hybrid electroslag additive manufacturing method is provided. This hybrid method combines the benefits of wire-arc additive manufacturing with the benefits of electroslag welding and casting. As discussed herein, the hybrid method employs an interleaved wall-and-infill strategy, wherein the wall is manufacturing via wire-arc additive manufacturing or other directed energy deposition, and the infill is provided by electroslag welding / casting techniques or similar processes, such as submerged arc welding. The hybrid method can produce large, complex components at higher rates with lower lead times than either of the techniques individually.
Owner:UT BATTELLE LLC
Soldering flux special for strip-electrode stainless steel electroslag
PendingCN121267468AWelding/cutting media/materialsProcess efficiency improvementElectroslag weldingFerrosilicon
The invention belongs to the technical field of welding materials, and discloses a special welding flux for strip-electrode stainless steel electroslag, which comprises a base material consisting of fluorite, aluminum oxide, wollastonite and magnesia, a modifier consisting of rare earth oxide and boron oxide, and an alloying deoxidizer consisting of silicon iron, low-carbon ferromanganese and metal zirconium. The flux can form a slag matrix mainly comprising calcium fluoroaluminate after being subjected to electroslag smelting, the modifier is dispersed and distributed in the slag matrix, and the alloying deoxidizer realizes deoxidation and microalloying through a slag-metal reaction. The flux has excellent welding manufacturability and excellent metallurgical performance, a stainless steel surfacing layer which is attractive in appearance, easy in deslagging, high in purity, fine in grain and excellent in low-temperature toughness can be obtained, and the flux is particularly suitable for band electrode electroslag surfacing with high standard requirements of nuclear power, petrochemical pressure vessels and the like.
Owner:ZHENGZHOU FENGHUANG NEW MATERIAL TECH CO LTD
Electroslag welding equipment
To improve the flux supply method in electroslag welding. [Solution] The electroslag welding apparatus 1 comprises a flux supply device 30 that supplies flux into the groove 6, and a control unit 100 that controls the flux supply device 30. The control unit 100 calculates the initial amount of flux to be supplied to the groove 6 based on information about the groove cross-sectional area when forming a slag bath 50 in the groove 6, and controls the supply of that initial amount of flux into the groove 6.
Owner:NIPPON STEEL WELDING & ENGINEERING CO LTD
Rail electroslag welding shape control method and system coupled with magnetic field and temperature field
The present application belongs to the field of welding forming, and particularly discloses a steel rail electric-shield welding shape control method and system coupled with magnetic field and temperature field, which comprises: the steel rails to be welded have a welding gap between them, and the welding gap can accommodate three electric-shield welding nozzles; two water-cooled copper molds are respectively arranged on the two sides of the steel rails to be welded, and a magnetic field stirring device is installed simultaneously; the steel rails to be welded are welded, and for any moment of the steel rails: a molten pool temperature field picture within a first time threshold before the current moment is acquired; welding parameters within a second time threshold before the current moment are acquired; a heat accumulation feature of the current moment is determined based on the acquired welding parameters and molten pool temperature field picture; the heat accumulation feature is input into a trained discrimination model to determine real-time parameter values of the water-cooled copper mold and the magnetic field stirring device, thereby realizing molten pool control at the current moment. The present application adopts a real-time joint control mode of temperature field and magnetic field stirring, and couples heat accumulation information to improve the quality of the welded joint.
Owner:HUAZHONG UNIV OF SCI & TECH
Temperature field coupled steel rail three-wire molten nozzle electroslag welding shape control method and system
The present application belongs to the field of welding forming, and discloses a temperature field coupled steel rail three-wire welding nozzle electric slag welding shape control method and system, which comprises the following steps: placing the to-be-welded steel rails in the welding position, the to-be-welded steel rails having a welding gap therebetween, the welding gap being capable of accommodating three electric slag welding nozzles, each nozzle having a welding wire therein; placing two water-cooled copper molds on the two sides of the to-be-welded steel rails; designing welding process parameters based on the welding gap, starting three-wire electric slag welding, and acquiring the temperature field in the welding steel rail molten pool in real time, and adjusting the welding process parameters in real time based on the temperature field; the welding process parameters at least include the flow of the water-cooled copper mold. The present application can improve the quality of the steel rail welding joint and ensure near-net forming of the steel rail weld.
Owner:HUAZHONG UNIV OF SCI & TECH