69 results about "Nickel based" patented technology

A shank adapter forming part of a drilling assembly includes a longitudinal axis, an external surface, an internal surface, a threaded part provided at a forward end and a plurality of splines provided at a rearward end. A machine part extends axially between the threaded part and the splines, wherein at least a part of the external surface is coated with a first corrosion protection layer of nickel and at least part of the first corrosion protection layer is coated with a polymer based sealant top layer.

The invention discloses a manufacturing process of an NO7718 nickel base alloy nut for nuclear equipment. The manufacturing process comprises the steps of material preparation, hot forging, shot blasting, solid solution heat treatment, physical and chemical detection, finish machining, precipitation hardening heat treatment and detection packaging. The hot forging near-net forming technology is adopted, the shape of the nut blank is directly obtained through plastic deformation, the cutting allowance of machining is greatly reduced, a large number of raw materials are prevented from becoming sweeps, the material utilization rate is remarkably increased, and the raw material cost is effectively reduced; by accurately controlling the initial forging temperature, the final forging temperature and the cooling speed of hot forging as well as subsequent solution treatment and precipitation hardening treatment, grains can be refined, and the precipitation form and distribution of a strengthening phase can be controlled, so that the microstructure of the material is optimized, and the material obtains more excellent comprehensive mechanical properties such as higher strength, plasticity and toughness cooperation; and the harsh working condition requirements of nuclear equipment can be better met. The process provided by the invention ensures the stability and consistency of product performance.

The utility model relates to the technical field of alloy plate longitudinal cutting devices, in particular to a nickel base alloy plate longitudinal cutting device. Comprising a supporting platform, an adjusting sliding rail, an adjusting motor, an adjusting lead screw, an adjusting sliding block, a graduated scale plate, an adjusting support, a hydraulic lifting rod, a lifting toothed plate, an adjusting shaft, an adjusting gear, an adjusting supporting plate, a discharging support, a discharging pulley, a feeding assembly, a limiting assembly, a guiding assembly and a cutting assembly. The alloy plate longitudinal cutting device comprises a supporting platform, a discharging support is arranged on one side of the supporting platform, a plurality of sets of discharging pulleys are arranged on the inner wall of the discharging support, the two ends of each discharging pulley are rotationally connected with the inner wall of the discharging support, and a graduated scale plate is arranged on the upper portion of one side of the supporting platform. Through the synergistic effect of mechanisms such as motor driving, thread adjustment, hydraulic lifting and pulley unloading, accurate longitudinal cutting and rapid unloading of the nickel-based alloy plate are achieved, and the machining efficiency and operation convenience are greatly improved.

Provided is a copper-manganese-nickel based alloy having characteristics (in particular, specific resistance) close to those of a nickel-chromium based alloy. It is also an objective to provide an alloy having high processability compared to a nickel-chromium based alloy. An alloy for a resistive body includes copper, manganese, and nickel, wherein the manganese is 33 to 38% by mass, and the nickel is 8 to 15% by mass.

A hydrogen evolution electrode preparation method based on a three-period minimal curved surface structure belongs to the technical field of new energy electrolytic hydrogen production and fluid transportation, and comprises the following steps: constructing a three-dimensional model of the required three-period minimal curved surface structure; performing image slicing processing on the three-dimensional model by using slicing software; printing a required three-period minimal curved surface structure by using a plane projection micro-stereolithography 3D printer; a nanometer ultraviolet lamp is adopted to circularly irradiate the three-period extremely-small curved surface structure; soaking in a sulfuric acid solution and carrying out ultrasonic oscillation; carrying out vacuum drying and carrying out oxygen plasma hydrophilic treatment; depositing a nickel-based compact conductive layer on the three-period minimal curved surface structure by using chemical deposition; depositing a nickel-iron alloy catalyst on the three-period minimal curved surface structure of the nickel substrate by using electro-deposition; and carrying out ultrasonic oscillation with ethanol and vacuum drying. According to the application, collaborative design of catalyst distribution and a macro-microstructure is realized, and a new way is provided for preparation of a high-performance water electrolysis hydrogen production electrode.

This invention relates to a palladium-nickel-based brazing filler metal and a brazing method for high-temperature brazing of ceramic materials. The composition and content (mass percentage) of the palladium-nickel-based brazing filler metal are as follows: Nb: 8.0%–15.0%; Ti: 10.0%–18.0%; Zr: 5.0%–12.0%; Hf: 2.0%–6.0%; Ni: 20.0%–30.0%; Pd: balance, with a Pd to Ni ratio of 3:2. The method includes preparing raw materials according to the filler metal composition; then melting the raw materials into alloy ingots using an electric arc melting method under argon protection; preparing strip-shaped or powdered filler metal; placing the prepared filler metal between ceramic / ceramic or ceramic / metal materials and then brazing it at high temperature in a vacuum furnace. This invention can be used for high-temperature brazing of Si3N4 ceramics, SiC ceramics and their composites, and SiBCN system ceramics and their composites, with a joint temperature resistance of not less than 900℃.

The utility model discloses a constant tension control device of a nickel base alloy wire, which belongs to the technical field of material processing, and comprises a workbench, the front side of the top of the workbench is fixedly connected with a supporting plate, the top of the inner side of the supporting plate is provided with a sliding groove, the inner side of the sliding groove is connected with a rotating roller in a clamping manner, and the rotating roller is connected with the workbench. A limiting plate is fixedly connected to the rear side of the top of the workbench, a winding roller is rotationally connected to the inner side of the limiting plate, a servo motor is fixedly connected to the top of the left side of the left limiting plate, a clamping hole is formed in the top of the right limiting plate, a limiting ring is clamped to the inner side of the clamping hole, and a control mechanism is fixedly connected to the top of the workbench. The two sides of the top of the workbench are fixedly connected with wire pressing mechanisms, and the control mechanism can detect the tension condition of the nickel-based alloy wire in real time, convert detected tension signals into electric signals and transmit the electric signals to the microcontroller.

This invention discloses a method for designing the composition of nickel-containing high-strength material systems based on transfer learning and the barrel theory optimization. The method includes: first, using a recursive feature elimination algorithm to screen key features across source domain benchmark data and target domain experimental data containing sparse components; second, constructing a deep neural network for pre-training on the source domain dataset, extracting nonlinear feature representations between components and performance through hidden layers; third, freezing the weights of the feature extraction layers of the pre-trained model, and for sparse samples in the target domain, introducing Bayesian ridge regression to construct a residual correction model to achieve cross-domain knowledge transfer; and finally, combining multiple metallurgical constraint criteria to perform an evolutionary search within a limited composition space. This invention solves the problem of effectively modeling sparse data in new material systems. By combining deep feature extraction with Bayesian residual correction, it significantly improves the robustness of high-strength material performance prediction and enables precise optimization of industrial-grade composition formulations.

The utility model relates to nickel base alloy processing technical field, and disclose a kind of nickel base alloy bar heat treatment device, including quenching furnace body and the transmission machine body being set in its right side, further include: the cooling tank being set in the right side of transmission machine body;For driving nickel base alloy bar after quenching cooling mobile structure, it is set in the inside of cooling tank;For preventing nickel base alloy bar to drop the shielding structure and limiting structure, it is set in the surface of mobile structure;The utility model is to provide a kind of nickel base alloy bar heat treatment device, with nickel base alloy bar after quenching moves to the top of moving frame, by the setting of cooling tank and mobile structure, nickel base alloy bar after quenching can be driven to move in the inside of cooling tank, so that nickel base alloy bar after quenching and cooling liquid in the inside of cooling tank are fully contacted, to carry out cooling treatment to nickel base alloy bar after quenching.

The invention relates to a trapping device for large-coil heavy nickel-based alloy wire rod production, and belongs to the technical field of wire rod production, the trapping device comprises a trapping cover and a fixing plate arranged above the trapping cover, the bottom of the trapping cover is open, a filter screen is arranged in the trapping cover, a gas outlet pipe is arranged at the top of the trapping cover, and a gas outlet pipe is arranged at the bottom of the trapping cover. An air exhaust mechanism is arranged in the air outlet pipe, harmful gas is sucked into the trapping cover from the bottom of the trapping cover through the air exhaust mechanism and then is exhausted from the air outlet pipe, and two protection mechanisms are arranged on the trapping cover and are symmetrically arranged front and back; the bottom opening of the collecting cover is sealed through the two baffles, dust falling on the filter screen is received by the baffles, pollution of a pickling solution on the lower portion due to falling of the dust on the filter screen is avoided, the dust intercepted on the filter screen is brushed off by the brush through movement of the scraper, cleaning of the filter screen is achieved, and the cleaning effect of the pickling solution on the filter screen is improved. The service life of the filter screen is prolonged.

The present application relates to the technical fields of high temperature creep test, in particular to a method for obtaining high temperature creep parameters of iron-nickel based alloy, which mainly determines the creep strain model of iron-nickel based alloy, obtains the creep strain rate calculation formula from the creep strain model, implements two creep tests of target test material under two different creep stresses at target temperature, respectively obtains the creep curves corresponding to creep time and creep strain, selects two creep times at the first stage and the second stage of the two creep curves respectively, obtains the creep strain and creep strain rate under the creep stress corresponding to the two creep times respectively, substitutes into the creep strain model and the creep strain rate calculation formula, and calculates the variable parameters of the creep strain model. The evaluation process of the creep model is greatly simplified, the required number of creep tests and test time are reduced, and the test cost is reduced.

The utility model relates to the technical field of slurry pumps, and discloses a slurry pump casing which comprises a first mounting seat, an outer casing is arranged on one side of the first mounting seat, a second mounting seat is fixedly arranged on the side, away from the first mounting seat, of the outer casing, and a slurry discharging sleeve is fixedly arranged on the side, away from the outer casing, of the second mounting seat. A sealing mechanism is arranged on the inner side of the slurry discharging sleeve, and a heat dissipation grid is fixedly arranged on the outer side of the outer shell. According to the pump shell for the slurry pump, one side of a slurry discharging pipe extends to the inner side of an extrusion gasket and is connected with a slurry discharging opening in the pump shell, a box cover is opened, and a locking bolt penetrates through a locking ring to be in threaded connection with a locking nut, so that the locking ring extrudes the extrusion gasket and drives the extrusion gasket to extrude a rubber ring, and the rubber ring is tightened; the connecting position of the slurry discharging pipe and the slurry discharging opening is blocked, slurry leakage is prevented, heat dissipation in the pump shell is facilitated through the arrangement of a heat dissipation grid, and a locking ring and an extrusion gasket are made of nickel base alloy.

The invention discloses a heat treatment method for enhancing flue gas and coal ash corrosion resistance of an iron-nickel-based high-temperature alloy and a product, and the heat treatment method comprises the following steps: heating the iron-nickel-based high-temperature alloy to 1100-1160 DEG C, and cooling to room temperature after heat preservation; the alloy obtained through treatment is heated to the solid solution temperature T, cooling is conducted in a controlled cooling mode after heat preservation, and in the process of reducing the solid solution temperature T to (T-500 DEG C)-(T-400 DEG C), the cooling rate is controlled to be 150-350 DEG C / min; in the process of reducing the temperature from (T-500 DEG C) to (T-400 DEG C) to the room temperature, the cooling rate is controlled to be 50-120 DEG C / min; and the alloy obtained through treatment is heated to 680-720 DEG C, and after heat preservation, the alloy is cooled to the room temperature. The invention further discloses the iron-nickel-based high-temperature alloy prepared according to the heat treatment method. On the premise that the structure stability of the iron-nickel-based superalloy is guaranteed, the smoke and coal ash corrosion resistance of the iron-nickel-based superalloy can be improved.

The present application relates to a low-cost iron-nickel-based heat-resistant alloy and a high-speed rolling method thereof, and belongs to the technical field of special alloy manufacturing. The present application solves the technical problems of cracking, short tool life, high energy consumption and low efficiency in subsequent solid solution treatment caused by uneven material temperature rise and cooling during high-speed rolling of the existing heat-resistant alloy. In the method of the present application, the heated heat-resistant alloy rolling stock is sequentially passed through the rough rolling, intermediate rolling and finishing rolling units. At least two cooling devices are arranged at the key positions in the later stage of the finishing rolling unit. The polyacrylamide aqueous solution containing specific particle size and proportion of aluminum oxide powder is used for intermittent jet cooling of the wire. The finished wire is directly put into the solid solution furnace for online solid solution treatment and water cooling. The present application realizes the integrated production of heat-resistant alloy wire from rolling to heat treatment with high efficiency, high quality and low energy consumption. The prepared wire has uniform structure and excellent performance, and is especially suitable for manufacturing engine valves.

The present invention relates to a process of making a corrosion resistant, aluminium-deposited nickel-based superalloy super alloy for fission microstructures. The alloy comprises a nickel-based substrate (10) containing nickel, chromium, molybdenum, and titanium, with an aluminium layer (20) deposited on the substrate using vacuum plasma deposition. The substrate contains 80-88% nickel, 4-7% chromium, 6-9% molybdenum, and 1-3% titanium by weight. The aluminium layer have a thickness between 50-200µm, and acts as a barrier against fluoride salt attacks, reducing degradation rates and ensuring better structural integrity of the fission microstructure. The aluminium-deposited nickel-based superalloy can be used in various components of fission microstructures, including fuel cladding, heat exchangers, and reactor vessels, to improve the efficiency, longevity, and safety in nuclear environments.

The utility model provides a nickel base alloy vacuum smelting device which comprises a reaction base body, a fastening ring is connected to the inner wall of the side end of a fastening rod in a sliding mode, a sealing cover plate is rotatably connected to the inner wall of the top of the reaction base body, and a sealing plate is installed and connected to the inner wall of the bottom of a telescopic supporting rod. Driving blocks are in driving connection to the inner walls of the side ends of the driving rods, mounting frames are mounted and connected to the inner walls of the side ends of the driving blocks, locking plates are rotationally connected to the inner walls of the side ends of the rotating rods, locking bolts are mounted and connected to the inner walls of the side ends of the locking rods, and stirring rods are mounted and connected to the interiors of the mounting frames. According to the nickel base alloy vacuum smelting device, through cooperative work of the installation frame, the locking plate and other workpieces, workers can conveniently and rapidly install and detach the stirring rod, so that the poor stirring effect caused by abrasion of the workpieces is reduced, meanwhile, due to the fact that the sealing plate and the fastening ring are used in cooperation, the sealing effect is good, and the sealing effect is good. And a workpiece at the top can be sealed.

The utility model discloses a nickel base alloy smelting device, which relates to the technical field of alloy smelting and comprises a smelting cylinder and a blanking assembly, a heat preservation cover is arranged outside the smelting cylinder, and the blanking assembly used for facilitating forming and blanking is arranged on the front side of the inside of the smelting cylinder. And the discharging assembly comprises a forming disc, a forming groove, a cooling cavity, a side connecting pipe and a conveying water pipe, the forming groove is formed in the surface of the forming disc, the cooling cavity is formed in the middle of the forming disc, the side edge of the forming disc is connected with the side connecting pipe, and the conveying water pipe is arranged in the side connecting pipe. According to the nickel-based alloy smelting device, nickel-based alloy is cast and formed in the smelting barrel, the situation that impurities enter the smelting barrel to affect forming during pouring-out is avoided, the two forming grooves can be alternately used under overturning of the forming disc, and the cooling cavity conducts conveying through one side of the conveying water pipe and outflow through the other side of the conveying water pipe, so that the forming grooves are cooled, and nickel-based alloy forming is assisted; the interior of the side connecting pipe is used for installing the conveying water pipe and controlling rotation adjustment of the forming disc.

The invention is suitable for the technical field of metal welding materials, and provides active soldering flux coated welding powder and a preparation method thereof.The method comprises the steps that in the vacuum melting water-gas combined atomization powder making process, soldering flux is dissolved in water, the soldering flux comprises one or more composite soldering flux of boric acid, sodium fluoborate, potassium fluoborate, boric acid, boric oxide and the like, and the soldering flux is added into the water; the soldering flux of the same kind is within the protection range of the patent. In the process that metal liquid flows into the atomization cavity and high-pressure steam are combined for atomization, the metal welding powder is rapidly coated with the scaling powder, the scaling powder rapidly enters the drying channel and enters the centrifugal channel, and the alloy welding powder coated with the active scaling powder is obtained and is not limited to a silver base, a copper base, a nickel base and the like. According to the technology, the metal welding powder coated with the active agent can be obtained through direct atomization. According to a traditional method, step-by-step coating is adopted, powder is prepared firstly, then active coating is conducted, the process is complex, and the powder is prone to oxidation. The problem that the oxygen content of powder is high in the water-gas combined atomization process is further solved.

An inductor has a main magnet core, a coil mounted around the main magnet core, and a residual magnet encapsulating the main magnet core and partially encapsulating the coil. The main magnet core is made of a main magnet core powder containing amorphous iron base material and nickel base material powders. The residual magnet is made of a residual magnet powder containing a main magnet powder and a soft magnet powder including an iron-silicon-chromium alloy powder and a carbonyl iron powder. Thus, through a low-loss feature of the amorphous iron base material and nickel base material powders, a loss of the main magnet core is reduced. Furthermore, a magnetic permeability of the residual magnet matches a magnetic permeability of the main magnet core. A magnetic leakage is further avoided, and the alternating current resistance is reduced. A quality factor and a conversion efficiency are enhanced.

The invention discloses an N08926 iron-nickel base alloy hot continuous rolling plate coil and an acid pickling surface treatment process. The process comprises the following specific steps that (1) a steel billet is prepared and put into a heating furnace to be heated; (2) high-pressure water descaling is conducted, specifically, oxide skin on the surface of the heated steel billet is removed through a high-pressure water spraying mechanism; (3) rough rolling is conducted, specifically, the heated steel billet is conveyed to a rough rolling machine through a conveying roller; 4) finish rolling; (5) coiling; (6) uncoiling and welding; (7) annealing is conducted, specifically, annealing treatment is conducted on the iron-nickel-based alloy hot-rolled plate through annealing equipment; (8) phosphorus breaking and shot blasting; (9) acid pickling is conducted, specifically, the iron-nickel-based alloy hot-rolled plate is subjected to acid pickling through acid pickling equipment to remove oxide skin; according to the acid pickling process, in the wringing treatment section in the acid pickling process, the brushing part and the wiping part can be controlled through the cleaning assembly to conduct impurity cleaning and acid liquor cleaning on the surface of the wringing roller in sequence, cleaning is relatively comprehensive, labor division is clear, and mutual interference is avoided.

The invention discloses a nickel base alloy flux-cored wire for dredging pipeline welding, a preparation method and a welding method, the flux-cored wire is composed of an outer skin and a flux core, and the flux core alloy is composed of the following components of, by mass, 58.0%-60.0% of Ni, 18.0%-20.0% of Cr, 4.5%-5.5% of Mo, 2.0%-3.0% of W, 1.0%-1.5% of Cu, 0.8%-1.2% of Si, 0.5%-0.8% of Mn, 3.5%-4.0% of CaCO3, 2.0%-2.5% of CaF2, 1.0%-1.5% of TiO2 and the balance inevitable impurities. When the flux-cored wire is used for TIG (Tungsten Inert Gas) welding, the flux-cored wire has excellent mechanical property and good hardness.

The invention discloses a high-strength and high-ductility nickel base alloy / low alloy steel layered-grain gradient composite material and a directional energy deposition preparation method thereof, and belongs to the technical field of metal material laser additive manufacturing. According to the composite material, low alloy steel serves as a base body, a nickel-based high-temperature alloy layer is deposited on the surface of the base body through directional energy deposition, and the layered composite material is obtained; by controlling deposition parameters, a deposition layer with the structure being columnar crystals is formed; the matrix layer is composed of isometric crystals, and the matrix layer has the gradient evolution characteristic that the grain size is from thick to thin from a near-interface area to a far-interface area; and a transition interface with a good metallurgical bonding effect is constructed between the two heterogeneous materials. The layered-grain gradient coupling structure is beneficial to accumulation and transmission of geometric necessary dislocation, so that stronger heterogeneous deformation induced stress is generated in the deformation process, the strength and ductility synergistic effect of the material is remarkably improved, and the performance limitation that strength and ductility are difficult to achieve at the same time in a traditional metal material is broken through.

To provide a positive electrode active material for a lithium secondary battery capable of securing high energy density and long life characteristics while securing price competitiveness by minimizing cobalt content, and to provide a positive electrode and a lithium secondary battery including the same.SOLUTION: A positive active material for a rechargeable lithium battery, the positive active material being a bimodal type including a first lithium nickel-based composite oxide of large particles and a second lithium nickel-based composite oxide of small particles, the first and second lithium nickel-based composite oxides including nickel in an amount of greater than or equal to about 80 mol% based on 100 mol% of total metals excluding lithium, the ratio of the weight (A) of the first lithium nickel-based composite oxides to the weight (B) of the second lithium nickel-based composite oxides in the positive electrode active material is 1 to 4, the span {(D90 - D10) / D50} of the first lithium nickel-based composite oxides is 0.9 to 1.2, the span of the second lithium nickel-based composite oxides is 0.9 to 1.2, and the span of the positive electrode active material is 1.5 to 2.SELECTED DRAWING: Figure 1

A hollow turbine airfoil or a hollow turbine casting including a cooling passage partition. The cooling passage partition is formed from a single crystal grain structure nickel based super alloy, a cobalt based super alloy, a nickel-aluminum based alloy, or a coated refractory metal.

The invention relates to the technical field of metal surface engineering, and particularly discloses nickel-based coated tungsten carbide and a preparation method and application thereof.The nickel-based coated tungsten carbide is composed of, by weight, 14.15%-17.19% of chromium, 1.68%-1.89% of molybdenum, 1.23%-1.5% of boron, 8%-15% of pretreated tungsten carbide, 0.5%-1.5% of yttrium oxide and the balance nickel and inevitable impurities. According to the invention, the contents of Cr, Mo, B and Y2O3 are accurately controlled, so that the components of a nickel-based alloy matrix are optimized; the high content of Cr and Mo provides a material basis for subsequent in-situ nitriding strengthening, and pitting corrosion resistance and uniform corrosion resistance of the coating are remarkably improved; due to the introduction of Y2O3, the effects of refining crystal grains and strengthening the structure are achieved; the proper WC content (8-15 wt%) is introduced to be combined with the tough nickel matrix, and the inherent defect that a traditional high-WC-content coating is large in brittleness is overcome.

The utility model discloses a nickel base alloy wire cleaning device, including the cleaning platform, the left side of cleaning platform top wall is equipped with a primary cleaning tank, the right side of cleaning platform top wall is equipped with secondary cleaning tank, and the inside installation of primary cleaning tank and secondary cleaning tank has ultrasonic generating equipment, and the left side of cleaning platform top wall is equipped with the placement roll through the U shape support seat, and the right side of cleaning platform top wall is equipped with the winding roll through the U shape support seat, and the outer wall of cleaning platform is equipped with the cleaning guide subassembly, and the right side of cleaning platform top wall is equipped with the traction subassembly, the utility model relates to alloy wire cleaning technical field, and the nickel base alloy wire cleaning device adopts the cleaning mode of ultrasonic wave and rolling brush, carries out double -washed through primary cleaning tank and secondary cleaning tank, can clean up the dirt of nickel base alloy wire surface residue completely, and the cleaning fluid adhered on the surface of wire material is adsorbed clean through the clean sponge, so that nickel base alloy wire material has good clean effect, reduces the residue of wire material surface dirt.

The utility model discloses a N06625 nickel base alloy hot continuous rolling rough rolling before oxide skin flushing device, including edge cleaning device, plane cleaning device, connecting device, edge cleaning device is equipped with two pairs, one pair of edge cleaning device is symmetrically arranged through connecting device in the both sides of support, and the other pair of edge cleaning device is symmetrically arranged through connecting device in one end of support, plane cleaning device is equipped with two groups, one group plane cleaning device both ends with symmetrically arranged in the both sides of support a plurality of electric push cylinder II fixed connection, and the other group plane cleaning device is located between two pairs of edge cleaning device and support fixed connection, and a plurality of conveying rollers are rotatably connected on the support. The utility model separates the edge of alloy slab and upper and lower surface through edge cleaning device and plane cleaning device and cleans, thereby prevents the edge of alloy slab and prevents the quality problem from appearing in the subsequent rolling process.

The present application belongs to the technical field of surface treatment of metal base material and biomass particle composite electrodeposition, and discloses a preparation method of AZ91D magnesium alloy surface nickel base nano pearl powder composite electrodeposition layer. The cathode adopts a magnesium alloy sample after chemical pre-deposition, the anode adopts a nickel plate with mass fraction greater than 99%, both are connected to the negative pole and the positive pole of the pulse power source respectively, are immersed in the pre-configured electrodeposition liquid and placed in an ultrasonic generator for electrodeposition, and the ultrasonic generator works in a variable frequency mode. The formed deposition layer has smooth appearance, compact and uniform, the hardness is increased by 20 times to 22 times compared with the magnesium alloy substrate, increased by 1.3 times to 1.6 times compared with the pure nickel layer on the magnesium alloy surface electrodeposition, and the self-corrosion current density is decreased by 2 orders of magnitude to 3 orders of magnitude compared with the magnesium alloy substrate.

The invention belongs to the technical field of high-temperature alloy connection, and provides a 650 DEG C supercritical diffuser nickel base alloy welding structure and a preparation method thereof. According to the method, an amorphous nickel-chromium-iron-silicon-boron alloy interlayer foil (the thickness is 20-60 microns, and the amorphous nickel-chromium-iron-silicon-boron alloy interlayer foil comprises 5-25 wt% of Cr, 0-30 wt% of Fe, 1-8 wt% of Si, 0.5-4 wt% of B and 45-75 wt% of Ni) is placed on a butt joint interface of two nickel-based alloy components, and a welding joint area is formed through instantaneous liquid phase diffusion welding (the temperature is 1000-1150 DEG C, the pressure is 2-20 MPa, and heat preservation is conducted for 1-10 h). The ultra-low leakage airtight sealing performance that the equivalent welding layer thickness is 0.05-0.50 mm and the leakage rate reaches 1 * 10 <-1 > * 10 Pa.m / s is realized; the problems that according to a traditional welding method, the requirements for high-temperature strength, creep fatigue reliability and ultralow leakage rate airtight under the 650 DEG C supercritical working condition are difficult to meet at the same time, the contradiction between a manufacturing end low-temperature short-time wide process window and the service end long-term structure interface stability is caused, and interface wetting filling and brittle phase control are difficult to collaboratively optimize are solved.

The invention relates to a low-cost iron-nickel-based heat-resistant alloy and a high-speed rolling method thereof, belongs to the technical field of special alloy manufacturing, and solves the technical problems of cracking, short service life of a knife edge, high energy consumption of subsequent solution treatment, low efficiency and the like caused by non-uniform temperature rise and cooling of a material during high-speed rolling of the existing heat-resistant alloy. According to the method, a heated heat-resistant alloy rolled blank sequentially passes through a rough rolling unit, an intermediate rolling unit and a finishing rolling unit, at least two cooling devices are arranged at key positions of the middle-rear section of the finishing rolling unit, and intermittent jet cooling is conducted on a wire through a polyacrylamide aqueous solution containing aluminum oxide powder with the specific particle size and proportion. And the wire after finish rolling directly enters a solid solution furnace to be subjected to online solid solution treatment and water cooling. Efficient, high-quality and low-energy-consumption integrated production of the heat-resistant alloy wire in the whole process from rolling to heat treatment is achieved, and the prepared wire is uniform in structure, excellent in performance and particularly suitable for manufacturing engine air valves.