93 results about "Nickel based" patented technology

The invention discloses a seawater conductivity sensor electrode material based on a copper-nickel-based nanostructure and a preparation method, the electrode material comprises: a substrate, a copper-nickel-based nanostructure layer being formed on the surface of the substrate; the substrate comprises an insulating compound and a coating coated on the surface of the insulating compound, the insulating compound comprises at least one of high-resistance silicon, silicon oxide, aluminum oxide ceramic and plastic, the coating comprises a metal coating and / or a semiconductor coating, and the copper-nickel-based nanostructure layer is in a dendritic crystal or cluster form. The copper-nickel alloy nanostructure is a core material of the electrode, so that the electrode material has high specific surface area and rich active sites, the measurement accuracy and measurement limit of the electrode material can be improved, the service life can be prolonged, the manufacturing cost can be reduced, and the application requirements of the ocean Internet of Things can be met.

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 invention relates to a hot rolling composite process for improving the strength of a low-alloy high-strength steel / nickel-based alloy bimetal composite plate, and belongs to the technical field of materials. Firstly, a welded assembly is subjected to heat preservation for 2-4 h at the temperature of 1250 DEG C, large-deformation rolling is adopted at the temperature higher than 1000 DEG C after discharging, the rolling reduction of each pass is larger than or equal to 20%, and in the stage, a composite plate is rolled to be 70% or above of the target thickness; and when the temperature is 900-1000 DEG C, rolling to a target thickness by adopting small deformation, and then cooling to room temperature in air. Effective metallurgical compounding of the bimetallic material can be realized by using the hot rolling compounding process, the obtained bimetallic compound interface is flat and straight and has no metallurgical defects such as pores and cracks, the interface of a sample subjected to three-point bending is still well compounded, and cracks are not generated macroscopically and microcosmically. According to the hot rolling composite technology, the back stress strengthening effect of a composite interface can be fully exerted, meanwhile, the proportion of dynamic recrystallization grains in the nickel-based alloy is reduced, and the strength of a nickel-based alloy layer is improved.

The invention particularly discloses a preparation method and application of a three-dimensional porous foamed nickel-molybdenum alloy material. The method comprises the steps that S100, a foamed nickel matrix is selected and cleaned; s200, the cleaned foamed nickel matrix is subjected to acid pickling and activation; s300, microcosmic etching is conducted on the surface of the foamed nickel base body subjected to acid pickling activation; and S400, electro-deposition is conducted on the foamed nickel base body obtained after microcosmic etching, and then the three-dimensional porous foamed nickel-molybdenum alloy material for the water electrolysis hydrogen production electrode is obtained. The prepared alloy material is a nickel-molybdenum alloy material with a three-dimensional porous structure, and the main component of the nickel-molybdenum alloy material is nickel-molybdenum alloy, so that compared with an existing hydrogen production electrode material, the nickel-molybdenum material is lower in price, and the alloy material has higher porosity and specific surface area due to the three-dimensional porous structure; according to the present invention, the hydrogen production electrode can have more hydrogen evolution active sites, the catalytic activity is high, the nickel-molybdenum alloy structure is stable, and the catalytic activity can be maintained for a long time in the alkaline environment.

The utility model relates to the technical field of compression springs, in particular to a high-temperature-resistant nickel base alloy compression spring which comprises a first flange, a fixing sleeve fixedly arranged at the top end of the first flange, a telescopic rod arranged in the fixing sleeve, a second flange fixedly arranged at the top end of the telescopic rod, and a spring body fixedly arranged at the bottom end of the second flange. A rotating sleeve is fixedly arranged at the bottom end of the spring body, a plurality of connecting blocks are fixedly arranged at the bottom end of the rotating sleeve, a connecting pipe is fixedly arranged at the bottom end of the side face of the fixing sleeve, and a plurality of connecting grooves are formed in the connecting pipe. Therefore, the stability of the rotating sleeve and the connecting block during placement is improved, the stability of the spring main body after elastic force adjustment is improved, and the adjusting effect of the device on the elastic force of the spring main body is improved.

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.

The invention relates to the technical field of nickel-based alloy heat treatment, in particular to an additive manufacturing nickel-based alloy heat treatment device which comprises an automatic guide structure and a heat treatment structure, the side end of the automatic guide structure is in butt joint communication with the heat treatment structure, a fixed lantern ring is fixedly arranged on the heat treatment structure, and a first connecting guide rod is fixedly arranged on the fixed lantern ring; a hydraulic supporting rod is hinged to the lower end of the first connecting guide rod, the lower end of the hydraulic supporting rod is hinged to a second connecting guide rod, the second connecting guide rod is fixed to a fixing side block, the side end of the fixing side block is fixed to a supporting bottom frame, and the supporting bottom frame supports the bottom of the fixing lantern ring; according to the heat treatment device for the additive manufacturing nickel-based alloy, a first fluted disc can be controlled to rotate through a stepping motor, so that a second fluted disc is subjected to angle adjustment of a certain amplitude, the positions of an inclined seat and a first heating roller are changed, the inclined seat and the first heating roller which are symmetrically arranged move, and internal regulation and control work is conveniently carried out; and high heat treatment work can be carried out on local positions.

An electrolysis device configured to produce hydrogen gas from water, the electrolysis device comprising a container (4), the container accommodating an aqueous alkaline solution (5), a cathodic electrode (1), and an anodic electrode (2), an electrical current being selectively applied between the cathodic electrode and the anodic electrode, wherein the cathodic electrode and possibly the anodic electrode, is made of a nickel alloy, with a nickel base alloyed with at least one element chosen among chromium, molybdenum, cobalt and iron, wherein the cathodic electrode and the anodic electrode are manufactured by an additive manufacturing process, from respective first and second mixed metallic powder compounds, wherein the cathodic and anodic electrodes exhibit an outer surface comprising a plurality of first surface patterns (6,7).

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 utility model relates to a tungsten-nickel-based shielding body component of a radioactive pipeline, which comprises a tungsten-nickel-based shielding body and a flexible rubber layer, the tungsten-nickel-based shielding body and the flexible rubber layer are cylindrical and are formed after cuboids are jointed, and the flexible rubber layer is arranged on the inner wall of the cylindrical tungsten-nickel-based shielding body; and the radioactive pipeline is coated and mounted in the flexible rubber layer on the inner wall of the tungsten-nickel-based shielding body. The utility model has the beneficial effects that the cylindrical tungsten-nickel-based shielding body is compact and has few pores, and the flexible rubber layer is arranged in the cylindrical tungsten-nickel-based shielding body, so that contact damage can be avoided, and the service life of the tungsten-nickel-based shielding body component of the radioactive pipeline is prolonged; step-shaped side plates are fixedly connected to two sides of a horizontal plate and two sides of a vertical plate of the right-angle-shaped bracket, and the step-shaped side plates are used for being vertically connected with the horizontal plate and the vertical plate of the right-angle-shaped bracket, so that a reinforcing effect is achieved; the tungsten-nickel-based shielding body component has better mechanical property; the nickel-based shielding body component has excellent gamma shielding performance and certain neutron shielding performance.

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.

The invention belongs to the technical field of forge piece heat treatment, and particularly relates to a local precipitation hardening treatment device for nickel base alloy forging, which comprises a local heat treatment machine body, the local heat treatment machine body comprises a PLC control center and a treatment tank, a quenching liquid circulation system is arranged at the bottom of the treatment tank, and a mounting table of an L-shaped structure is arranged in the treatment tank; the vertical part of the mounting table is connected with the inner wall of the treatment tank through a vertical transmission mechanism; the protection cover is arranged on the limiting seat on the upper side of the forge piece, the absorption holes are formed in the inner wall of the protection cover, and the absorption holes can suck air in the area on the lower side of the protection cover, recover smoke generated by high temperature of the forge piece and guide the smoke into external purification equipment, so that pollution gas generated during forge piece machining is absorbed and purified; therefore, adverse effects of divergence of quenching flue gas on the surrounding environment are reduced, and the working environment of operators is improved.