21results about How to "Good welding performance" patented technology

The invention discloses a high-strength silver-free copper-based brazing filler metal which is composed of P, Sn, Ni and Cu. The high-strength silver-free copper-based brazing filler metal is low in cost, safe, environmentally friendly and good in welding effect; through the adding of Sn and Ni, the melting point of brazing filler metal alloy is reduced, and the tensile strength and wettability of the brazing filler metal alloy are enhanced.

The application discloses a high-entropy alloy wear-resistant coating flux-cored wire, which comprises a flux core and a welding sheath; the flux core is composed of the following components: Ti: 25%-30%, Ta: 20%-25%, Al: 20%-23%, Mn: 20%-23%, Y: 5%-15%, and the sum of the atomic percentages of the above components is 100%; the welding sheath is an FeCoNi strip, and the welding sheath is composed of the following components: Cr: 0.006%, Cu: 0.011%, C: 0.1%, Co: 17.31%, Ni: 29.08%, Si: 1%, and Fe is the balance. The application further discloses a preparation method and application of the high-entropy alloy wear-resistant coating flux-cored wire. The application solves the problems of insufficient high-temperature performance, easy wear and easy corrosion of a new nuclear power turbine blade TC4 surface under a long-term working environment.

This invention discloses a hot-rolled steel sheet for vacuum train tubes that exhibits excellent yield strength, weldability, low-temperature toughness of the welded portion, vibration damping ratio, and is free from hot cracking. The hot-rolled steel sheet according to this invention is characterized in that its alloy composition, by weight percent, comprises: C: less than 0.06% (more than 0%), Si: 0.5-1.5%, Mn: 1.2-2.2%, Cu: 0.5-1.5%, Ni: more than 0.25%, Ti+Nb+V: less than 0.02% (inclusive of 0%), the balance being Fe and unavoidable impurities.

This invention discloses a ship plate steel with high plasticity, excellent impact toughness, and excellent weldability, and its production method. The composition of the ship plate steel includes C, Si, Mn, Als, P, S, Re, and the balance Fe and impurities. The preparation method includes: heating the billet at a temperature of 1150–1250℃, a heating rate of 8–12 min / cm, and a furnace exit temperature in the range of 1170±30℃; rolling: the first-stage rolling temperature is ≥1050℃, the intermediate billet thickness is 3 times the thickness H of the finished steel plate, and the second-stage rolling temperature is ≤960℃. The final rolling temperature is 830±30℃; the red-hot temperature after rolling is determined according to the thickness H of the finished steel plate. When H≤16mm, the red-hot temperature after rolling is 620±40℃; when 16<H≤25mm, the red-hot temperature after rolling is 640±30℃. The maximum thickness of the finished steel plate obtained by this invention is 25mm, the yield strength ReH≥320MPa, the tensile strength Rm≥420MPa, the elongation A≥30%, the longitudinal impact energy KV2≥200J at 0℃, and the steel plate microstructure is ferrite + pearlite. It is an economical high-plasticity ship plate steel.

The utility model discloses a kind of take neck flange plate welding devices, it is related to take neck flange plate welding field, including support stable frame, the upper surface of support stable frame is equipped with stable support disc, the inside of stable support disc is equipped with the extension clamping mechanism for supporting the neck flange workpiece, the extension clamping mechanism includes fixedly embedded spring, and fixedly embedded spring nesting is installed in the inside of stable support disc.The take neck flange plate welding device, when needing to carry out internal stable operation to neck flange workpiece, two groups of contact contraction semicircular rods are rotated inwards, so that back extension rod drives arc occlusion plate inwards, at this moment neck flange workpiece can be placed to arc occlusion plate inside, after no longer force, fixedly embedded spring will carry out stable clamping to the inside of neck flange workpiece, the design makes the applicability of different sizes neck flange improve, can carry out efficient and fast clamping stable operation, improve the use intelligent property of equipment.

The utility model relates to glass welding technical field and disclose a kind of glass welding vacuum jig, including base, the top of base is equipped with fixed base, the both sides outer wall of fixed base is fixedly connected with the connecting block of symmetrical distribution, when installation, the output shaft rotation of motor drives bidirectional screw rod rotation and further drives movable plate to move, movable plate moves through connecting rod and drives pressing plate, and further make pressing plate close to fixed base, when positioning plate and fixed base contact, fixed base makes positioning plate move and enter into recess, first spring deformation, glass body along positioning plate enters fixed base, until two groups of glass body are pasted, at this time, the cavity is sealed by first sealing gasket and second sealing gasket, start vacuum pump, vacuum pump carries out vacuumizing in the cavity through conduit, it is convenient to install, ensure that the glass to be welded between is vacuum state, make two layers of glass to be welded stick tighter to reach better welding effect.

This invention relates to a method for producing low-density, high-strength, and high-toughness protective steel plates from continuously cast billets, belonging to the field of metallurgy. The steel plate is an Fe-Mn-Al-C series austenitic low-density steel plate with an austenitic matrix supplemented by dispersed fine precipitated carbides, achieving high strength and high toughness, thus meeting the requirements for ballistic protection. The steel plate has a production thickness of 6-12 mm, a width of 1600-3000 mm, and a density of 6.75-7.05 g / cm³. 3 It has a density 7.85 g / cm³ higher than that of conventional steel. 3 The steel plate exhibits at least a 10% reduction in weight, good machinability and weldability, and excellent ballistic protection performance. A 6mm thick steel plate meets the NATO AEP STANAG 4569 standard Level I ballistic protection requirements, while a 12mm thick steel plate meets the NATO AEP STANAG 4569 standard Level II ballistic protection requirements. Production process: smelting—continuous casting—slow cooling—rolling—heat treatment—finishing—inspection—warehousing.

This invention relates to a method for welding the ends of an aluminum rotating target. The method includes the following steps: (1) assembling both ends of the aluminum target tube with a flange and a cap respectively to obtain an aluminum target tube with a welded joint; (2) performing friction stir welding on the welded joint in step (1), and machining it after cooling to obtain the aluminum rotating target; the friction stir welding in step (2) includes a first weld, a second weld, and a third weld performed sequentially. This invention, by dividing the friction stir welding process into three sequential welds, achieves excellent weld joint performance, eliminates crack defects, and significantly improves sealing performance.

This invention discloses an electromagnetic pulse welding coil for welding tubular metals. The electromagnetic pulse welding coil is arranged circumferentially along a driving tube. The driving tube can obtain Lorentz force through electromagnetic induction of the electromagnetic pulse welding coil, providing the impact velocity for welding. The electromagnetic pulse welding coil is composed of several circumferentially connected "convex"-shaped structures. The "convex"-shaped structures are arranged with an inward rotation of 90°, and the wide end at the outer end has a notch. One side of the notch is connected to the other side of the notch of the adjacent "convex"-shaped structure through a connecting block, thereby connecting all the "convex"-shaped structures into a whole, forming a ring structure around the driving tube. This invention has the advantages of significantly improving the electromagnetic energy utilization efficiency, increasing electromagnetic energy, and being applicable to electromagnetic pulse welding of difficult-to-deform metals.

The application provides an acid core wire and a preparation method and application thereof, and particularly relates to the technical field of welding materials. The core wire comprises a steel belt sheath and a core filled in the steel belt sheath. The core comprises the following components in percentage of mass: 35-50% of rutile, 2.5-5% of zircon sand, 2.5-5% of potassium feldspar, 1.5-3% of potassium fluozirconate, 1.5-3% of quartz, 15-20% of metallic manganese, 3-5% of ferrosilicon, 15-20% of nickel powder, 1-2% of cobalt powder, 1-2% of molybdenum powder, 1-2% of aluminum-zirconium alloy, 1.5-3.5% of magnesium powder, 1-2% of perovskite, and the rest is atomized iron powder. The acid core wire has good welding process, good arc stability, less spatter, good appearance of weld formation, good deslagging property, high deposition rate and deposition rate, and the weld has the characteristics of high strength, high low-temperature impact toughness and corrosion resistance, and can meet the use requirement of high-strength Q690 rack steel.

This application relates to a hot-rolled pickled duplex steel and its preparation method, belonging to the field of strip steel production technology. The chemical composition of the duplex steel, by mass fraction, is: C: 0.05%~0.15%, Si: 0.15%~1.50%, Mn: 1.0%~2.0%, Al: 0.02%~0.10%, P≤0.015%, S≤0.006%, Cr: 0.1%~0.5%, Nb: 0.01%~0.05%, Ti: 0.01%~0.03%, Ni: 0.01%~0.40%, V: 0.001%~0.050%, with the remainder being Fe and unavoidable impurities. Through optimized C-Si-Mn-Cr-Nb-Ni composition system design, combined with controlled rolling and staged laminar flow cooling processes, a multiphase microstructure composed of ferrite and martensite was successfully obtained in the hot-rolled pickled duplex steel. This multiphase microstructure enables hot-rolled and pickled duplex steel to maintain high strength while retaining high elongation. Furthermore, a specific component ratio effectively suppresses softening in the weld heat-affected zone. This hot-rolled and pickled duplex steel is particularly suitable for passenger car chassis manufacturing, achieving a balance between lightweight design, high safety performance, and good manufacturability.

This invention discloses a low-carbon equivalent, high-toughness, ultra-high-strength marine engineering steel, FH550, and its production method, belonging to the field of metallic materials technology. The chemical composition of this steel, by mass percentage, is: C: 0.06~0.12%, Si: 0.20~0.40%, Mn: 1.30~1.70%, P≤0.015%, S≤0.003%, Al: 0.02~0.05%, Nb: 0.030~0.06%, V: 0.010~0.040%, Ti: 0.010~0.025%, Cr: 0.10~0.30%, B: ≤0.0005%, with the balance being Fe and impurities, and a carbon equivalent (Ceq) ≤0.44%. The production method includes: hot metal pretreatment → BOF smelting → LF refining → RH vacuum treatment → thick slab continuous casting → slow cooling with cover → billet heating → two-stage rolling → accelerated cooling → flaw detection → inspection. The two-stage rolling adopts a strong reduction process, and accelerated cooling after rolling replaces the quenching and tempering treatment. The FH550 steel plate of this invention has a yield strength ≥550MPa, an average KV2 impact energy ≥260J at -60℃, and combines ultra-high strength, low-temperature high toughness, and excellent weldability. The production process is simple, has a short cycle, and low cost, and can be widely used in deep-sea marine engineering, bridges, and other fields.

The application discloses a building steel bar welding device and belongs to the technical field of steel bar welding. The building steel bar welding device comprises a supporting base, the upper surface of the supporting base is provided with cleaning mechanisms at both ends, the cleaning mechanisms comprise cleaning assemblies for cleaning steel bars, limiting driving assemblies for fixing the steel bars and supporting and position adjusting the cleaning assemblies, the cleaning assemblies are arranged at one end of the limiting driving assemblies, and the upper surface of the supporting base is provided with first limiting supporting plates for supporting the limiting driving assemblies at both ends. The steel bar is cleaned multiple times through the cooperation of multiple structures, the welding quality of the steel bar welding device is not affected by the residual sundries on the steel bar, the welding effect of the steel bar welding device on the steel bar is better, and secondly, the application can be applied to different types of steel bars, so that the application range of the steel bar welding device is wider.

This invention discloses a method for producing hot-rolled pickled steel strip for CT70 grade coiled tubing, comprising: smelting and continuous casting, wherein the chemical composition and weight percentage of the continuously cast billet are: C: 0.06~0.10%, Si: 0.10~0.30%, Mn: 0.60~0.90%, P: ≤0.018%, S: ≤0.005%, Cu: 0.20~0.30%, Ni: 0.10~0.25%, Cr: 0.45~0.65%, Mo: 0.10~0.30%, Nb: 0.008~0.015%, with the remainder being Fe and impurities; heating the continuously cast billet; hot rolling; cooling and coiling. This invention, by adding appropriate amounts of Mn, Cu, Cr, Ni, Mo, and Nb, ensures that the product is matched with a reasonable controlled rolling and cooling process and pickling process, resulting in a product with uniform and fine microstructure, stable performance, and good surface quality and strip shape.

This invention relates to the field of hot extrusion manufacturing technology, specifically to a high-strength weldable 6xxx series aluminum alloy profile, its manufacturing method, and its application. The aluminum alloy profile is composed of the following weight percentages: Si: 0.80%~1.2%, Fe≤0.20%, Cu: 0.40%~0.80%, Mn: 0.30%~0.70%, Mg: 0.70%~1.1%, Cr≤0.25%, Zn≤0.10%, Ti≤0.10%, Zr: 0.05%-0.20%, Pb<0.01%, with the balance being Al and unavoidable impurities. The profile meets the following performance requirements: tensile properties, R... m ≥420MPa, R p0.2 ≥330MPa, A 50mm ≥8.0%; Fatigue performance: at r=0.1, N=1×10 7 Under the same conditions, the fatigue strength σ of the smooth sample is ≥145MPa, realizing the lightweight manufacturing of high-speed trains.

This invention belongs to the field of solder paste technology and discloses a formulation and preparation method of low-melting-point SMT solder paste, comprising solder alloy powder, a mixed substrate, and flux, wherein the ratio of each component of the solder alloy powder, mixed substrate, and flux is 60:30:10. This invention avoids reducing the mechanical strength of the solder joints, ensures the completion of low-melting-point soldering, and improves the wettability of the solder paste. Simultaneously, by utilizing type A and type B viscosity modifiers to control the viscosity of the mixed substrate and flux respectively, it ensures viscosity quality control during comprehensive mixing. This allows the solder paste to adapt to different process requirements in different application scenarios, improves solder adhesion performance, and provides better flow control, enabling the solder to better adhere to the pad apertures or solder joints during vertical printing or wave soldering. Overall, it improves the soldering performance of low-melting-point SMT solder paste, resulting in good soldering effect and long lifespan.

The utility model provides a kind of glasses pipe bowl welding equipment, including setting on the pipe bowl feeding device of rack, pipe line feeding device, positioning and pressing device and welding device.Pipe bowl feeding device includes feeding mechanism, distributing mechanism and detection mechanism, and feeding mechanism is provided with feeding track, distributing mechanism includes index plate, and multiple accommodation grooves for accommodating pipe bowl are provided in index plate, and rotating index plate to make the feeding end of feeding track can be docked in different accommodation grooves to push pipe bowl into different accommodation grooves.Detection mechanism is used to detect the state of pipe bowl in accommodation groove.Pipe line feeding device is used for pipe line discharge.Positioning and pressing device includes first fixture for supporting and positioning pipe bowl, and second fixture for supporting and positioning pipe line, and first fixture and second fixture can be close to each other.Welding device is used to weld pipe bowl in first fixture and pipe line in second fixture into integrated glasses pipe bowl.

The utility model provides a kind of automatic positioning and automatic welding in pipeline a kind of stainless steel lining repair automatic welding equipment, to solve above-mentioned technical problem, the utility model provides following technical scheme, including positioning track, positioning track is equipped with guide slot, the lower end of positioning track is fixedly connected with multiple electromagnet positioning block, welding generator is slidably connected on positioning track, driving wheel is rotatably connected in welding generator and cooperated with guide slot, telescopic link is slidably connected on welding generator, and welding head for welding is connected to welding part adjusting plate by telescopic link extended end, and infrared ray director for guiding welding part is fixedly connected in the position corresponding place of telescopic link extended end and welding head, and wire feeder is connected to the upper end of welding head and supplies welding wire.

The present application relates to steel member welding technical field, specifically to a kind of steel member welding overturning device and method, including base, two limiting clamping mechanisms, welding gun overturning mechanism, two steel pipe overturning mechanisms and welding mechanism;Welding gun overturning mechanism includes two supports, outer gear ring, U-shaped plate, two sliding plates, first motor, two rotating shafts and gear, and the both ends of outer gear ring have first sliding groove respectively;Each steel pipe overturning mechanism includes two rings, base plate, mounting plate, heightening block, second motor and multiple balls, and the base plate has two second sliding grooves, and the two second sliding grooves have multiple circular grooves respectively;The device can overturn the adjustment of steel pipe and welding mechanism, so as to adjust welding position, make welding efficiency high, and welding effect is good.

This invention discloses a low-carbon equivalent extra-thick high-toughness normalized steel plate for offshore wind power and its manufacturing method. The steel plate is 100-150mm thick, and its chemical composition by weight percentage is C: 0.12-0.18%, Si: 0.20-0.40%, Mn: 1.20-1.60%, P≤0.020%, S≤0.005%, combined with trace amounts of Ni, Mo, and Cr tempering and Nb+V+Ti ternary composite microalloying, with strict control of B≤0.0005% and carbon equivalent CEV≤0.43%. The steel plate has a yield strength ≥355MPa, tensile strength 470-560MPa, and a single Charpy impact energy of -50℃ in both transverse and longitudinal directions ≥50J. The manufacturing method includes smelting and casting, heating of continuously cast billets, rolling, and normalizing heat treatment. The rolling compression ratio is ≥3.0, the reduction rate of the last three passes of rough rolling is >9%, the finishing rolling temperature is 780-820℃, the normalizing temperature is 870-900℃, and the holding time coefficient is 1.5-2.5 min / mm. This invention solves the problems of insufficient strength and toughness and uneven thickness properties of extra-thick plates with low carbon equivalent. It has good weldability, low production cost, and is suitable for offshore wind power monopile foundation structural components, and can be mass-produced.

The application relates to a processing method of a cast aluminum flasked casting of an automobile testing tool. The method comprises the following steps: rough turning a reverse surface of the cast aluminum flasked casting, determining X, Y reference and Z excess of the cast aluminum flasked casting; rough turning a front surface of the cast aluminum flasked casting, processing X, Y reference on the front surface of the cast aluminum flasked casting, checking the X, Y reference, firstly performing local rough turning of 8mm, then removing 0.5mm by using an insert blade, and continuing to rough turn to 3mm after confirming that there is no sand hole in the local rough turning position; rough turning the reverse surface of the cast aluminum flasked casting, taking the X, Y, Z reference as the reverse surface station processing reference, and rough turning to 3mm by using the insert blade; removing a blank material, processing a reverse surface exhaust gate and a process column, and finally rough turning a profile; and naturally aging for 24H after the rough turning is completed, and internal stress is eliminated. The method can accurately and effectively perform reference positioning and plane checking, and can timely find sand holes and remove internal residual stress of a workpiece, and the method has excellent processing performance and low defective product rate.