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1167 results about "Electron beam welding" patented technology
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Electron-beam welding (EBW) is a fusion welding process in which a beam of high-velocity electrons is applied to two materials to be joined. The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact. EBW is often performed under vacuum conditions to prevent dissipation of the electron beam.
Full area temperature controlled electrostatic chuck and method of fabricating same
InactiveUS6853533B2Liquid surface applicatorsLighting and heating apparatusTemperature controlMetallurgy
A semiconductor wafer support assembly and method of fabricating the same are provided. In one embodiment, the method and resulting assembly include attaching a pedestal joining-ring to a bottom surface of a ceramic puck. Low temperature brazing a composite cooling plate structure to the bottom surface of the ceramic puck, where the pedestal joining-ring circumscribes the composite cooling plate structure. Thereafter, a pedestal is electron-beam welded to the pedestal joining-ring.
Owner:APPLIED MATERIALS INC
Method for manufacturing a near net-shape mold
A method for manufacturing a near net-shape mold from a weldable material, including creating a computer model of a mold portion (30,32), analytically sectioning the computer model of the mold portion into a plurality of mold zones (22), generating mold zone cutting paths for a cutting machine to follow, cutting the weldable material into plurality of mold zones, generating surface profile cutting paths for a cutting machine to follow, machining surface profiles into the mold zones, assembling the mold zones by placing the mold zones side-by-side, generating welding paths for an electron beam welding a machine to follow, and welding the mold zones together.
Owner:STEWART DAVID H
Spring junction and assembly methods for spinal device
InactiveUS20070032123A1Conveniently facingStable and reliableInternal osteosythesisJoint implantsHeat-affected zoneCoil spring
Spinal stabilization devices, systems and methods are provided that include a spring junction wherein a structural member is mountable to a spine attachment fastener and a resilient element is affixed to the structural member along an attachment region of the resilient element. The attachment region is disposed physically separately with respect to an active region of the resilient element. The attachment region can include a weld region produced via an E-beam welding process involving temperatures of 1000° F. or greater, wherein a heat-affected zone adjacent the weld region is disposed physically separately with respect to the active region. The resilient element may be a coil spring including bend regions adjacent its outermost (i.e., last) coils wherein the material of the coil spring initially bends away from the last coil, then bends back toward the last coil before terminating near the last coil.
Owner:RACHIOTEK
Spring junction and assembly methods for spinal device
InactiveUS7713288B2Stable and reliableWithout undue risk of annealingInternal osteosythesisJoint implantsHeat-affected zoneCoil spring
Spinal stabilization devices, systems and methods are provided that include a spring junction wherein a structural member is mountable to a spine attachment fastener and a resilient element is affixed to the structural member along an attachment region of the resilient element. The attachment region is disposed physically separately with respect to an active region of the resilient element. The attachment region can include a weld region produced via an E-beam welding process involving temperatures of 1000° F. or greater, wherein a heat-affected zone adjacent the weld region is disposed physically separately with respect to the active region. The resilient element may be a coil spring including bend regions adjacent its outermost (i.e., last) coils wherein the material of the coil spring initially bends away from the last coil, then bends back toward the last coil before terminating near the last coil.
Owner:RACHIOTEK
Technological process for producing super-thick plate
InactiveCN101439348AQuality improvementLow costTemperature control deviceElectron beam welding apparatusElectro-slag remeltingVacuum chamber
The invention relates to a process for producing an ultra-thick plate and belongs to the field of rolling and producing an ultra-thick steel plate in the metallurgical industry. The invention mainly overcome the defect of producing the ultra-thick steel plate by a traditional model casting manufacturing blank and an electro-slag remelting manufacturing blank. The method comprises the following steps: cutting and fixing lengths of the blanks, mechanically conditioning the blanks (eliminating, leveling and cleaning a single-surface oxide layer of a casting blank with a milling machine, a planer or a shot blast); clamping an assembly (relatively superposing the cleaning surfaces of the two blanks after processing, placing the two blanks oppositely and clamping the blanks); mounting the blanks in a vacuum chamber of an electronic beam welding machine for purpose of vacuuming; sewing the assembly on the electronic beam welding seal edge, heating the assembly in a furnace and rolling the assembly through temperature control; and then producing the ultra-thick steel plate. Compared with the traditional electro-slag remelting production process, the process has the advantages of high production efficiency, reduced electric power consumption, less investment of production devices and low production cost. Compared with the traditional die casting production process, the process solves the problem of segregation and looseness of a large-scale die casting ingot center part; the finished product ratio is high; and the finished product ratio of blank assembly is over 90 %.
Owner:SHANDONG IRON & STEEL CO LTD
Pressure sensor
InactiveUS6176137B1Fluid pressure measurement using ohmic-resistance variationSolid-state devicesInterior spacePressure sense
A pressure sensor 1 comprises a metallic housing 10 having a space 18 communicated to a pressure detection space and a thin rising portion 17 formed on the upper end of the peripheral area, a sensor element 20, a sensor element holder 30, a metallic pressure case 60 having a ceiling portion 61, and a connector case 70 formed of an insulating material, wherein a collar portion 211 of a base plate 21 of the sensor element 20 including a pressure sensing element 22 is contacted to an annular protrusion 33 positioned around the opening 32 of the sensor element holder 30, and the collar portion 211 is airtightly welded to the annular protrusion 33 by projection welding. Further, the collar portion 63 on the pressure case 60 and the peak surface 35 of the holder 30 is airtightly welded by an electron beam welding. The airtight interior space defined by the sensor element 20, the sensor element holder 30 and the pressure case 60 is utilized as the reference pressure space.
Owner:FUJIKOKI CORP
Fan casing assembly welding method and tool for fan casing assembly welding method
ActiveCN104439730AImprove molding qualityControl heightWelding/cutting auxillary devicesWork holdersEngineeringWelding process
The invention discloses a fan casing assembly welding method and a tool for the fan casing assembly welding method and belongs to the technical field of the welding technology. By the adoption of the fan casing assembly welding method and the tool for the fan casing assembly welding method, the problems that in the welding process, the weld joint forming quality is poor, root reinforcement exists on a weld joint, deformation is serious, dimension errors are large and blade protection is difficult are solved. The fan casing assembly welding method comprises the following steps of preparation before welding, positioning, assembly of a baffle, electron beam welding, inspection after welding, assembly of a heat treatment tool and vacuum heat shaping. The baffle is composed of an upper plate and a lower plate. The fixing tool for welding comprises a base plate, a shaft, a gland, a positioning ring, a supporting ring and a plurality of pressing plates. The heat treatment tool comprises a base plate, a cover plate and a plurality of pressing blocks.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Method and tooling for controlling deformation of nickel-based ageing-strengthening high-temperature alloy casing welding assembly
ActiveCN103551770AAvoid fatigue crackingMeet reliabilityWelding/cutting auxillary devicesAuxillary welding devicesWelding residual stressElectron
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Vacuum electron beam welding method for thin-walled titanium alloy assembly
InactiveCN1762636AImprove pass rateQuality improvementElectron beam welding apparatusWave shapeTitanium alloy
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Electron beam welding method of gas turbine casing with horizontal flange structure
ActiveCN102990217AImprove manufacturing levelLow costElectron beam welding apparatusStructural engineeringSpot welding
The invention discloses an electron beam welding method of a gas turbine casing with a horizontal flange structure, and relates to the welding method of the casing with horizontal flanges. The invention aims at solving the technical problems of large deformation, complicated tooling design and manufacture, low repetition usage rate of the tooling and low production efficiency after the horizontal flanges are welded by the existing half-ring gas turbine casing welding method. The welding method comprises the following steps of: 1, machining; 2, cleaning the surfaces of parts to be welded; 3, spot welding; 4, scribing; 5, assembling; 6, spot welding at fixed positions; 7, centering; 8, interpolating, and 9, welding the electron beam. Once vacuum electron beam welding of four horizontal flanges is achieved by the welding method disclosed by the invention; the deformation after welding is small; the production efficiency is doubled; X-ray flaw detection non-destructive testing is carried out; a welding line does not generate the defects such as lack of penetration, air holes, cracks and puncture; the quality of the welding line meets the requirements; and the electron beam welding method is simple in tooling design and manufacture, and high in repetition usage rate of the tooling, and can be used for welding the horizontal flanges of the gas turbine casing.
Owner:HARBIN TURBINE
Leaf seal and method of producing a leaf seal
InactiveUS20070085277A1Reduce distractionsAvoid disadvantagesEngine sealsLeakage preventionContact lineGas turbines
A leaf seal for sealing a shaft rotating about an axis, in particular in a gas turbine, includes a multiplicity of spaced-apart leaves (26) which are arranged in a concentric circle around the axis and are fixed in their position by welded connections produced by electron beam welding, the leaves (26), with their surfaces, being oriented essentially parallel to the axis. The welded connections of the leaves are improved by the leaves (26) being designed in such a way and being arranged in the leaf seal in such a way that they abut against one another at the side edges directly or via intermediate spacers (27) along at least one contact line (36) extending over a plurality of leaves (26), and by the welded connections being designed as welds directed along the at least one contact line (36) and oriented in axial direction.
Owner:ANSALDO ENERGIA IP UK LTD
Alpha plus beta two-phase titanium alloy and method for processing same
An alpha plus beta two-phase titanium alloy and a method for processing the same relate to an ultrahigh-strength weldable short-time heat-resistant (alpha plus beta) two-phase titanium alloy and a method for processing the same in the field of aerospace and armament. The alpha plus beta two-phase titanium alloy is characterized by comprising the following components by weight percent: 6.5%-7.9% of Al, 1.6%-2.6% of Sn, 1.6%-2.6% of Zr, 1.8%-2.8% of Mo, 0.9%-2.3% of Cr, 1.6%-2.6% of Nb, 0.8%-1.8% of Ni, no more than 0.5% of Si, no more than 0.20% of Fe, no more than 0.10% of C, no more than 0.10% of N, no more than 0.15% of O, no more than 0.015% of H, no more than 0.40% of other impurities and the balance of Ti. The titanium alloy can be welded through adopting an electronic beam welding method, and the strength coefficient after the welding can reach above 0.8. The titanium alloy is the ultrahigh-strength titanium alloy with the tensile strength which can reach above 1200 mega pascals at room temperature and reach the maximum magnitude of 1700 mega pascals; and the alloy has the electronic beam welding characteristic and the short-time heat resistance at high temperature of 600 DEG C.
Owner:WESTERN METAL MATERIAL
Titanium-aluminide turbine wheel and shaft assembly, and method for making same
A titanium-aluminide turbine wheel (120, 220, 320, 420) is joined to the end of a shaft (110, 210, 310, 410) by utilizing a titanium surface on the end of the shaft to be joined to the wheel, and electron-beam welding the wheel onto the titanium surface on the shaft. A steel shaft (110, 310, 410) can have a titanium-containing end piece (130, 330, 430) mechanically joined (by brazing, bonding, or welding) to the end of the shaft, and the end piece can be directly electron-beam welded to the wheel. Alternatively, the shaft (210) can be formed as a titanium member and the end (212) of the shaft can be directly electron-beam welded to the wheel (220). In another embodiment, a ferrous end piece (330) is mechanically joined to the titanium-aluminide turbine wheel (320) and then the end piece is directly electron-beam welded to the end of a steel shaft (310). Alternatively, a silver-titanium alloy member (430) is sandwiched between the wheel (420) and a steel shaft (410) and is melted to join the parts together.
Owner:GARRETT TRANSPORATION I INC
Assembling precision control method of single-body blades in blisk of electron beam welding structure
InactiveCN102837160AImprove assembly accuracy before weldingBreak through the key technical difficulties that the weld seam gap is less than 0.1mmWelding/cutting auxillary devicesAuxillary welding devicesEngineeringWeld line
The invention belongs to the field of machining and particularly relates to an assembling precision control method of single-body blades in a blisk of an electron beam welding structure. The method disclosed by the invention comprises the following steps of: firstly, machining the single-body blades; designing convex technical circular platforms at blades tip parts of blade blanks; utilizing five coordinate milling centers to simultaneously mill welding surfaces and blade body modeled faces of the blades; dividing the single-body blades into seven groups to be clamped on a specific welding clamp, so as to finally control an assembling error to be within 0.05 mm; and after assembling, carrying out subsequent electron beam welding. According to the assembling precision control method disclosed by the invention, a reasonable blade forging blank structure design, integrated precise machining of blade references and welding surfaces, predication before welding of welding deformation of the blades, pre-compensation before welding, reasonable design of an assembling and welding clamp, and precise assembling of the blades on the clamp before welding, and the like are applied, so that the assembling precision of the blades before the welding is greatly improved, and the key technical difficulty that the gap between welding lines is ensured to be less than 0.1mm before electron beams are welded is broken through; and the after-welding precision of the blisk of the electron beam welding structure is controlled, an industrial blank is filled and the researching cost and the researching period are reduced at the same time.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Electron beam welding method of adding transition layer into compound between metals of titanium aluminium alloy
InactiveCN1695870ANo crackOvercoming the problem of low mechanical strengthElectron beam welding apparatusMetallic foilCrazing
An electronic beam welding method of Ti-Al alloy by adding transmission layer to generate intermetallic compound includes thermally treating the Ti-Al alloy to be welded for eliminating stress, chemically and physically cleaning the surfaces of TiAl alloy and metallic foil, filling the metallic foil in the seam to be welded, preheating by electronic beam, microalloying by electronic beam, and natural cooling.
Owner:HARBIN INST OF TECH
Low pressure electron beam welding of li-ion battery connections
ActiveUS20130029206A1Lower resistanceReduce sensitivityFinal product manufacturePrimary cellsLithiumElectrical battery
A method for connecting individual lithium ion cells into a battery suited for powering an electric or hybrid vehicle is disclosed. The cell current collectors are electron beam welded to one another and to a connector tab in an substantially oxygen-free atmosphere. The cell current collectors and the connector tab are temporarily secured with a clamp, one portion of which has an opening. The electron beam size may be controlled, by magnetic coils and by the extent of electron scattering by the gas atmosphere, to minimally fill the clamp opening to minimize any irradiation of the clamp. The beam or the workpieces may be displaced, if required, fuse the entire opening area. A similar procedure may be followed to weld a plurality of connector tabs to a busbar.
Owner:GM GLOBAL TECH OPERATIONS LLC
Copper-tungsten/copper-alloy integrated contact and preparation method thereof
The invention relates to a contact material for high-voltage switches and discloses a copper-tungsten / copper-alloy integrated contact and a preparation method thereof. The copper-tungsten / copper-alloy integrated contact comprises a contact part and a conducting rod part, wherein the tungsten content of the contact part gradually decreases from head to tail. The preparation method comprises the following steps: firstly, mechanically mixing powder by a wet method to prepare copper-tungsten particles with different tungsten contents; secondly, putting the tungsten in the die cavity of a compression mold according to the weight contents of tungsten in a descending order to carry out the press forming; thirdly, putting the pressed blank in a graphite boat, and sintering and infiltrating the pressed blank in a sintering furnace in the hydrogen atmosphere to obtain the copper-tungsten alloy of the contact part; and finally, sintering the low-tungsten-content end of the copper-tungsten alloy and the copper conducting rod part or the copper alloy conducting rod part to form an integral body by using a sintering method, an electro-beam welding method or a diffusion welding method, thereby obtaining the copper-tungsten / copper-alloy integrated contact.
Owner:XIAN FULAI ELECTRICAL ALLOY
Vacuum electron beam welding method for thin-wall titanium alloy box structure with multiple cabin sections
ActiveCN104858542AControl welding deformationWeld Quality ControlElectron beam welding apparatusWelding/soldering/cutting articlesEngineeringTitanium alloy
The invention belongs to the field of welding technologies and particularly relates to a vacuum electron beam welding method for a thin-wall titanium alloy box structure with multiple cabin sections. All the cabin sections are welded by adopting the method of integral assembling and one-shot clamping, a reasonable welding sequence and reasonable welding parameters are selected, welding deformation and weld joint quality are controlled, and the technical difficulties that products are poor in integral rigidity and welding deformation is difficult to control are overcome. According to the scheme, a welded joint, achieving single face welding, double face forming and back face spatter avoiding, of a thin-wall titanium alloy box is achieved, and welding quality meets the requirements of the primary national military standard GJB1718A-2005 Electron Beam Welding. After the multiple sections of the box are spliced and welded, the appearance precision requirements that cylindricity is smaller than 1.0 mm-1.5 mm and coaxiality is smaller than 2 mm-3 mm, and meanwhile the hydraulic pressure strength and the airtight strength of the box meet product use requirements.
Owner:BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
Manufacturing process suitable for tungsten and steel connection of first wall part of fusion reactor
InactiveCN105499816AHigh densityImprove connection strengthArc welding apparatusElectron beam welding apparatusThermal expansionUltimate tensile strength
The invention discloses a manufacturing process suitable for tungsten and steel connection of first wall part of a fusion reactor, belonging to the welding field of metal diffusion welding. The process comprises the following steps: 1, processing tungsten, steel and interlayer material workpieces according to requirements, and finishing a to-be-welded surface; 2, after processing, decontaminating and cleaning the workpieces by ultrasonic waves, and carrying out vacuum sealing; 3, manufacturing a stainless steel sheath; 4. putting the workpieces into the sheath in sequence, and sealing the sheath by electron beam welding or argon arc welding; 5, welding the sealed workpieces and sheath in a hot isostatic pressure machine, adopting high-purify argon gas by pressurizing gas, maintaining the temperature for 1.5-6h in the welding environment at 600-1080 DEG C and under the pressure of 100-300MPa, carrying out furnace cooling, and discharging from the furnace when the temperature is lower than 150 DEG C; and 6, carrying out necessary hot processing. According to the manufacturing process, the problem of poor connection performance of tungsten and steel caused by large difference of coefficients of thermal expansion can be solved, the connection strength and reliability of tungsten and steel can be improved.
Owner:INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
Deposition forming manufacturing method of parts and molds
ActiveCN105945281AImprove mechanical propertiesImprove metallurgical qualityAdditive manufacturing apparatusIncreasing energy efficiencyElectricityStructure property
The invention discloses a deposition forming manufacturing method of parts and molds, and belongs to the field of non-mold growing manufacturing and remanufacturing. The method comprises the following steps that S1, the three-dimensional CAD model of a workpiece to be formed is subjected to hierarchical slicing; S2, the CNC codes of all hierarchical slices are acquired; S3, deposition forming is conducted layer by layer according to the CNC codes of all the hierarchical slices, the fine portions of the workpiece are formed by laser, and one or more technologies in electric arc welding, electron beam welding, electroslag welding and submerged-arc welding is or are adopted to form the thick wall and the non-fine portions of the workpiece; or in the S3, a heat source which is compounded by laser beams and gas protection electric arcs or a heat source which is compounded by the laser beams and vacuum protection electronic beams is adopted for forming the thin wall and the fine portions of the workpiece, and the gas protection electric arcs or the vacuum protection electron beams are shut down. According to the deposition forming manufacturing method, direct deposition forming can be achieved to obtain parts and molds which are stable in structure property and high in manufacturing precision and are provided with thin walls or fine portions.
Owner:HUAZHONG UNIV OF SCI & TECH
A vacuum electron beam welding method
ActiveCN1962153AAvoid formingReduce porosityFurnace typesElectron beam welding apparatusHeat-affected zoneEngineering
The invention relates to a vacuum electronic beam welding method, which comprises (1), welding preparation that cleaning target material and back plate, and moving it into vacuum room to vacuum; (2), preheating welding seam; (3), the first vacuum electronic beam welding; (4), vacuum insulating temperature of target material; (5), second vacuum electronic beam welding; (6), quenching that taking out the target material from the vacuum room, and quenching. Compared with present technique, the invention insulates temperature after the first welding, to accumulate the H atoms on the welding seam to form air holes, then execute the second welding to remove said air holes, and it quenches the target material to avoid dispersing left H atoms, to effectively control the hole rate of welding seam.
Owner:KONFOONG MATERIALS INTERNATIONAL CO LTD
Fractal graphene material with negative electron affinity as well as preparation method and application thereof
ActiveCN101966987APromote escapeExcellent electron field emission capabilityField emission deviceChemical vapor deposition
The invention relates to a fractal graphene material with negative electron affinity as well as a preparation method and application thereof. The fractal graphene material is prepared by adopting a superhigh temperature chemical vapor deposition process and comprises monolayer fractal flake graphene and multilayer fractal flake graphene which are deposited on a substrate and vertically grow in a staggered way; along with the increase of the temperature of the substrate, the crystal state of a graphene nanosheet trends to vertical growth, which directly decides the electrical property orientation of the graphene nanosheet; and the negative electron affinity is generated due to the existence of a large-curvature strip-shaped bulging structure of the flake graphene so that the local field is enhanced, therefore, the fractal graphene material has stronger field electron emission capacity and high structure stability, is very suitable for manufacturing a cathode material of a field emission device and has wide application prospects in the fields of field emission display, cold cathode electric light sources, X-ray sources, electron beam welding and cold cathode electron source devices, and the like.
Owner:CHONGQING QIYUEYONGYANG MICROELECTRONICS SCI&TECH DEV
Material assembling method and rolling method for titanium-steel clad plate
InactiveCN104874634ASolve the problem of interface oxidationHigh bonding strengthMetal rolling arrangementsSurface oxidationTitanium
The invention relates to a material assembling method and rolling method for a titanium-steel clad plate and belongs to the field of titanium-steel clad plate manufacturing and processing. The material assembling method comprises the following steps: a, preparing two steel plates, two titanium plates and four side plates and removing an oxidation layer and oil stains on the surface of each plate; b, forming a hole in at least one side plate and welding a seamless carbon steel pipe at each opening hole; c, symmetrically assembling a blank from one steel plate, the two titanium plates and the other steel plate in sequence, and welding the blank into a combination body; d, after welding, connecting each seamless carbon steel pipe with a vacuum pump, vacuumizing to reach a pressure value no greater than 1*10<-2>Pa and sealing the seamless carbon steel pipe to obtain an assembled blank material. According to the material assembling method of the titanium-steel clad plate, the internal vacuum treatment of the blank material can be completed without the help of a vacuum electron beam welding box, and thus the production procedure is simplified, the cost is saved, the assembling effect is good and the problem of the interface oxidation of the titanium-steel clad plate can be effectively solved.
Owner:PANGANG GROUP RESEARCH INSTITUTE CO LTD
Ultrasonic auxiliary vacuum electron beam welding method of aluminum and aluminum alloy
InactiveCN101690991ATo promote floatingEasy to fillWelding/cutting auxillary devicesAuxillary welding devicesUltrasonic assistedStructural load
The invention discloses an ultrasonic auxiliary vacuum electron beam welding method applied to aluminum and an aluminum alloy, which can solve the technical problem that the aluminum, the aluminum alloy and especially cast aluminum alloy generate cavity type defects such as air hole, cold laps and the like in the process of welding a vacuum electron beam so as to improve mechanical properties of welding joints. In the technology, structural load ultrasonic energy with certain frequency and certain amplitude is applied in the process of welding the vacuum electron beam, the ultrasonic frequency is between 15 and 50 kHz, and the amplitude is between 10 and 50 mu m. A molten pool and adjacent areas thereof generated by welding the vacuum electron beam are continuously oscillated to a certain extent, so that the cavity type defects such as the air hole, the cold laps and the like can be effectively eliminated in the process of welding to obtain high quality welding joints.
Owner:CHONGQING UNIV OF TECH
Manufacture technique for thermonuclear reactor flow-passage containing parts
InactiveCN101332557AImprove cleanlinessAvoid damageNon-electric welding apparatusAs elementHeat-affected zone
The invention discloses a production process applicable to runner-containing parts in a fusion reactor blanket. The production process includes the steps: first, a plate and a runner-containing rectangular tube are manufactured according to the design and undergo precision surface working, the roughness Ra is less than 6.3Mum; second, the runner-containing parts are cleaned and decontaminated and then heated in vacuum for degassing; third, the runner-containing parts are vacuumized in an electron beam welding machine and the periphery of the surface to be welded is hermetically welded; and then the runner-containing parts are put into a hot isostatic pressing furnace for forming by hot isostatic pressing diffusion welding; finally, bending forming, heat treatment and machining, and the like, are performed. By adopting the production process; the runner-containing parts manufactured by the production process have reliable and uniform comprehensive performance without the weak performance zones of the heat affected zone, and the like, resulting from the fusion welding process or the defects such as element segregation and air vent, and the like, existing in the similar casting parts, thereby, the production process is particularly applicable to the production of the runner-containing part with the fusion reactor blanket under the condition of intense neutron radiation.
Owner:INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
09MnNiDR ultra-thick low temperature container plate and production method thereof
Owner:SHANDONG IRON & STEEL CO LTD
Vacuum electron beam welding method
ActiveCN101559515AAvoid cooling effectAvoider Vacuum StepsElectron beam welding apparatusPorosityEngineering
The invention discloses a vacuum electron beam welding method, which comprises the following steps of: providing a target blank material and a backboard used for supporting the target blank material; implementing welding preparation; pre-heating; and adopting the vacuum electron beam to implement vacuum welding to weld the target blank material on the backboard. The vacuum electron beam welding method also comprises the step of directly implementing surface modification after the vacuum welding. The vacuum electron beam welding method directly implements surface modification after the vacuum welding and does not need vacuum insulation or pump air to reduce the temperature, thus avoiding the subsequent step of vacuumizing, quickening the cycle period of the product and simultaneously reducing the porosity of the sputtering target blank material after being welded.
Owner:KONFOONG MATERIALS INTERNATIONAL CO LTD
Steam turbine bulkhead electron-beam welding method
The electron beam welding method of the steam turbine clapboard refers to a kind of welding technique. The invention is realized in the following way: a. clean the surface of the clapboard; b. assemble and fix the clapboard on the frock in accordance with the requirement of mounting technology of the electron beam's clapboard; c. move the fixed clapboard to the electronic welding vacuum chamber to vacuumize it; d. when the vacuum degree reaches predetermined value, heat the clapboard for between 15min and 30min with electron beam stream; e. weld the clapboard with the electron bombardment welding machine; f. after finishing the welding, heat the clapboard for over 30min with electron beam stream; g. after postheat treatment, isolate the clapboard in the vacuum chamber for between 15min and 30min; h. move the welded clapboard out of the vacuum chamber and put it into the temper furnace for heat treatment. The invention is featured by short production cycle, high welding precision, simple technique and low cost.
Owner:HARBIN TURBINE
Control method of electron-beam welder acceleration high-voltage power supply as well as power-supply apparatus
ActiveCN101323048AEasy to adjustEasy to implementConversion with intermediate conversion to dcElectron beam welding apparatusEngineeringHigh pressure
The invention discloses a control method and power supply device for an electron-beam welding machine to accelerate high-voltage power supply, which uses three-phrase commercial power and adopts the current transformation mode of AC-DC-AC-DC; wherein, the inversion link DC-AC in the middle is medium-frequency inversion; the function of high frequency pulse width modulation and voltage regulation is realized in the inversion process; the transmission of the electrical energy, the transformation of the voltage value and high voltage insulation are realized by a medium frequency high voltage transformer; by using a high voltage sampling signal as an inverse feedback signal to control the duty cycle of the high frequency pulse width modulation output wave, the automatic stable regulation of the output high voltage is realized. Therefore, the device is characterized by little harmonic interference in the power network, quick system regulation, small output high voltage ripple, simple manufacturing and higher efficiency.
Owner:GUILIN THD TECH CO LTD
Production process for hot-rolled composite blank
InactiveCN104550233AGuaranteed vacuumImprove bindingElectron beam welding apparatusMetal rolling arrangementsThick plateHeating furnace
The invention relates to a production process of a hot-rolled composite blank. The production process comprises the following steps of: (1), cleaning base metal plates and clad metal plates, and cleaning the surface of a to-be-composited surface by use of a milling machine so that the surface is clean; (2), putting a high-temperature antisticking agent between the two clad metal plates, and putting the two superposed clad metal pates between the two base metal plates; (3), putting base plate metal strips at the parts, which are adjacent to the edges, of a gap between the two base metal plates, and performing spot welding on the base metal plates and the base plate metal strips so that the metal plates are fixed to form a blank; (4), sealing the peripheral edges of the blank by virtue of welding the blank via vacuum electron beam welding so as to form a dual-metal composite steel plate blank; and (5) heating the dual-metal composite steel plate blank in a heating furnace, discharging the blank out of the heating furnace, rolling the blank by virtue of a high-power medium and heavy plate mill, straightening after rolling, and trimming to obtain the hot-rolled composite blank. The production process is simple, good in combination quality, high in efficiency, relatively low in production cost, short in period, easy for production organization and low in loss.
Owner:SHANDONG IRON & STEEL CO LTD
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