240 results about "Superalloy" patented technology

The application belongs to the field of turbine blade thermal barrier coating of an aero-engine. Specifically, it is a structure design, a preparation method and a prepared coating of a double-layer radiation-resistant thermal barrier coating with a high-reflection layer and a high-absorption layer. The coating comprises a high-absorption layer and a high-reflection layer. The high-absorption layer can absorb part of the energy of photon radiation and re-emit it into the environment, while relying on a cooling gas film to quickly remove heat. Part of the energy of the photon radiation is reflected by the high-reflection layer again to the high-absorption layer after passing through the high-absorption layer, and the process of absorption-emission-cooling gas film heat dissipation is repeated. Within a set temperature range, the absorption rate of the high-absorption layer is determined based on the temperature difference requirement between the inner and outer surfaces of the thermal barrier coating, and the high-absorption layer material is determined based on the absorption rate. The application greatly reduces the radiation heat flow penetrating the coating, avoids the direct heating of the high-temperature alloy by infrared radiation, and significantly improves the heat insulation capacity of the thermal barrier coating and the service life of the turbine blade.

This utility model belongs to the field of milling technology for high-temperature alloys, specifically a simple milling device for rough machining of high-temperature alloy steel. It includes a base, a milling cutter assembly on the top of the base, and a track connecting the milling cutter assembly to the base. The milling cutter assembly can move back and forth along the track. A support is located in front of the base, and a platform is mounted on the support. A frame is located on the side of the platform, and a clamping assembly is mounted on the frame. The clamping assembly includes an indexing chuck, which can move left and right along the frame. This utility model, through the arrangement of multiple tracks, allows for adjustment of the workpiece position, avoiding the Y-axis design of traditional machine tools, reducing the cost and size of the equipment. Simultaneously, its simple operation reduces the labor costs for advanced operators.

This invention provides a brazing filler metal, a brazing filler metal preparation method, and a rectifier brazing method. The brazing filler metal includes a first brazing filler metal and a second brazing filler metal. The brazing filler metal preparation method involves uniformly mixing high-temperature alloy powder and brazing binder at a mass ratio of 2:1 to 3:1 to form the first brazing filler metal; and uniformly mixing BNi2 powder and brazing binder at a mass ratio of 10:1 to 15:1 to form the second brazing filler metal. By specifying brazing filler metals with a specific particle size ratio and applying different types of brazing filler metals in different zones, defects such as incomplete welding and porosity that are difficult to control in large-gap welds during processing and assembly are solved, improving the welding quality of welds with both large and small gaps, thereby increasing the product qualification rate.

The present application relates to a kind of nickel-based superalloy precision end slot turning processing method.The present application includes providing special tool and general tool;Turbine disk long axis end is divided into end surface area, outer diameter area, outer diameter slot area, inner diameter area, end surface slot area and inner diameter slot area;Special tool and general tool are used in sequence according to above-mentioned order to carry out rough machining;After rough machining is completed, special tool and general tool are used in sequence according to above-mentioned order to carry out finish machining;Special tool is used to the end surface slot area is rough machined and finished machined;Using external turning tool to the end surface area and outer diameter area is rough machined and finished machined;Using first external slotting tool to the outer diameter slot area is rough machined and finished machined;Using second external slotting tool to the outer diameter slot area is rough machined and finished machined;Using internal turning tool to the inner diameter area is rough machined and finished machined;Using internal slotting tool to the inner diameter slot area is rough machined and finished machined.The present application improves the stability of processing quality and production efficiency.

The present application relates to the technical field of high-temperature oxidation-resistant coating, and particularly relates to a modified NiCoCrAlYTa bonding layer and a preparation method thereof.The present application adopts low-pressure plasma gas spraying to prepare a NiCoCrAlYTa bonding layer on the surface of a high-temperature alloy substrate, then performs shot peening treatment to reduce the surface roughness of the coating, then performs Al-Cr co-diffusion, and forms a co-diffusion bonding layer with an outer Al-rich layer, an intermediate Cr-rich layer and an inner NiCoCrAlYTa layer, finally performs vacuum pre-oxidation to form a TGO layer on the surface of the co-diffusion bonding layer, thereby obtaining the modified NiCoCrAlYTa bonding layer.The modified NiCoCrAlYTa bonding layer prepared by the present application has excellent high-temperature oxidation resistance and corrosion resistance, and can realize long-time service.

This invention provides a method for forming and preparing high-alloyed high-temperature alloy powder that can be used in multiple processes. To address the problems of traditional high-alloyed high-temperature alloys having limited applications, high R&D costs, and incompatibility between different processes and materials when applied in multiple fields, this method carefully balances alloying elements and controls matching forming process parameters. This improves the adaptability of the alloy to various forming processes while maintaining good mechanical properties. The alloy powder can be simultaneously used for wide-gap brazing support materials, hot isostatic pressing, and additive manufacturing. Characterization is performed using a combination of various testing and characterization methods, and the results are comparable across different processes. The results show that the alloy prepared by the forming method provided in this application has uniform and fine dendrites and grains, low porosity, good thermal stability, and possesses high mechanical properties and good forming process performance.

The present application belongs to the technical field of vacuum metallurgy, and discloses a method for precisely controlling manganese element in cobalt-based high-temperature alloy. The method calculates the designed addition amount of manganese element through an empirical formula, and controls the production process according to a specific melting process. The preparation method comprises the following steps: according to the target value of Mn element, the addition amount of Mn element is designed according to an empirical formula; the vacuum induction melting process of the alloy is designed according to the temperature and vacuum degree designed according to the empirical formula; and the production of the cobalt-based high-temperature alloy containing manganese element is carried out by using the designed melting process. The present application can realize the precise control of the manganese element in the cobalt-based high-temperature alloy, and the control error range is within ±10%, which greatly improves the quality stability of the cobalt-based high-temperature alloy master alloy.

The application discloses a kind of progressive forming device, process and process design method of engine boss component, belong to aerospace equipment technical field, the progressive forming process of engine boss component includes the following steps: S1.to high-temperature alloy material is preheated;S2.high-temperature alloy strip after preheating is handled by progressive die, and the boss component is prepared.The process method disclosed in the application effectively solves the problems existing in the traditional processing method by the continuity of production and high-speed production rhythm of progressive die, combined with material heating temperature control system.The process method has the advantages of improving production efficiency, reducing cost, improving product precision and consistency, and reducing deformation risk, etc., and can realize high-quality, high-efficiency boss product production.

The application discloses a silver-free high-temperature lubricating coating and a preparation method and application thereof, and comprises the following steps: S1: stirring and mixing an aluminum source, a magnesium source, a chromium source and a phosphoric acid aqueous solution to obtain a mixed solution; S2: mixing the mixed solution with a tellurium source, a molybdenum source and a cobalt source, and obtaining a silver-free high-temperature lubricating coating after ball milling; and coating the silver-free high-temperature lubricating coating on a base material, and obtaining a silver-free high-temperature lubricating coating after solidification. The application provides the high-temperature lubricating coating which is applied to high-temperature alloy fasteners and adopts a telluride to replace silver as a high-temperature lubricating material, and the high-temperature lubricating coating has better high-temperature resistance and stronger stability compared with other coatings; the telluride can maintain the original structure and performance under 600-800 DEG C.

This application belongs to the field of metallurgical technology, and particularly relates to a vacuum induction deep desulfurization process for high-temperature alloys. Insufficient contact between the melt and the desulfurizing agent, poor reaction kinetics, and difficulty in effectively separating desulfurization products are significant factors contributing to the difficulty in deep desulfurization of high-temperature alloys during vacuum induction melting. Existing technologies use calcium-magnesium-based desulfurizing agents or calcium oxide crucibles for in-situ desulfurization, which suffers from low desulfurization efficiency due to high-temperature volatilization, short crucible life, and limited mass transfer. The embodiments of this application overcome the technical bottleneck of diffusion-limited mass transfer in slag-metal reactions under vacuum by employing a porous desulfurizing agent combined with electromagnetic stirring to drive the high-temperature alloy melt through the porous desulfurizing agent, achieving a simultaneous improvement in desulfurization efficiency and depth.

The present invention relates to the technical field of the development of a novel CraCubMncNid High Entropy based Alloy (HEA) system and process for preparation thereof. More particularly, the present invention relates to CraCubMncNid high entropy alloy-based system, wherein the concentration of a in the ranges of 5-17 atomic percent (at %), b in the range of 18-35 atomic percent (at %), c in the range of 17-34 atomic percent (at %), and d in the range of 23-37 atomic percent (at %). The unique combination of these elements unlocks a new level of performance and reliability, marking a significant advancement in the field of high entropy alloys. Cr—Cu—Mn—Ni-based High Entropy Alloys (HEAs) exhibiting cost effective, superior strength, hardness, tribological performance, and corrosion resistance at room temperature. Cr—Cu—Mn—Ni-based High Entropy Alloys (HEAs) alloy system a robust alternative to traditional nickel-based and nickel-iron-based superalloys in a wide range of applications.

The utility model discloses a kind of high-temperature alloy parent alloy smelting dispensers, including centralized material pipe, the both ends of centralized material pipe are fixedly connected with connecting hopper, connecting hopper upper surface is equipped with feed inlet, connecting hopper is communicated with external storage hopper by feed inlet, connecting hopper outlet end extends to centralized material pipe, the outlet end of centralized material pipe is fixedly connected with discharging shell, discharging shell outlet end is fixedly connected with discharge hopper, discharge hopper bottom is provided with discharge port, discharge hopper is communicated with external smelting equipment by bottom discharge port;The utility model automation motor drive replaces manual work, substantially shorten single furnace proportioning time, reduce safety risk, adapt high-temperature alloy parent alloy mass smelting demand, improve production continuity and efficiency, double speed regulation can effectively control distribution precision, meet the demand of high-temperature alloy parent alloy to trace valuable element accurate addition.

The application discloses a single-phase gamma' phase bonding layer alloy for high-temperature alloy and application thereof, and belongs to the technical field of material surface modification and coating. The single-phase gamma' phase bonding layer alloy for high-temperature alloy has the following chemical components and mass percentages: 8.9-9.4% of Al, 7.5-8.0% of Co, 4.9-5.4% of W, 4.4-4.9% of Ta, 2.8-3.1% of Cr, 1.4-1.6% of Ti, <=0.2% of Mo, <=0.2% of Hf, and the balance of Ni. The application is aimed at a nickel-based high-temperature alloy, and a coating component is designed in combination with the concept of matching compatibility of phase composition and a matrix. Under the premise of improving the Al element content in the alloy, the composition of the bonding layer is finally determined by determining the element composition of the gamma', wherein the gamma' phase is based on the Ni3(Al, Ti) phase and is similar to the composition of the gamma' / gamma phase of the nickel-based high-temperature alloy, so as to ensure the interface compatibility of the bonding layer and the matrix.

The present application relates to the field of material science and engineering application technology, specifically to a kind of metal material thermal mechanical fatigue life fast prediction method based on hysteresis energy density.First, hysteresis curve is used to calculate hysteresis energy density, then the quantitative relationship between shape coefficient, stress variation range and plastic strain range between low cycle fatigue and thermal mechanical fatigue is used, to achieve the purpose of predicting thermal mechanical fatigue hysteresis energy density under the same mechanical strain amplitude by low cycle fatigue, finally, energy accumulation damage model is used to predict thermal mechanical fatigue life.The method carries out two groups of experiments for low cycle fatigue and thermal mechanical fatigue respectively, realizes the prediction of thermal mechanical fatigue life under different mechanical strain amplitudes by low cycle fatigue, establishes the correlation between low cycle fatigue and thermal mechanical fatigue by using the similarity between them in the process of cyclic loading, effectively reduces the experimental amount required for thermal mechanical fatigue life evaluation, and is applied to the thermal mechanical fatigue life prediction of high-temperature alloy and vermicular cast iron and other metal materials.

The application belongs to the field of metal material manufacturing, and particularly relates to a manufacturing method of a precipitation hardening type nickel-based high-temperature alloy GH141 cold-rolled sheet, which solves the problems of poor hot plasticity, easy cracking and difficult cooling control in the processing of the GH141 cold-rolled sheet by optimizing a process flow, and the manufacturing method comprises the following steps: high-temperature homogenization treatment of a steel ingot, optimization of homogenization temperature and a cooling mode to improve hot plasticity; preheating + package + fast forging process is adopted in forging breakdown to reduce heat loss and ensure a forging temperature interval; heating temperature, finish rolling temperature and pass deformation amount are strictly controlled in the hot rolling process to ensure sheet quality; in the cold rolling stage, a large reduction ratio is adopted to roll a semi-finished product, and a finished product is controlled in shape and performance through a multi-pass small deformation process; and a cooling speed is particularly optimized in the finished product solid solution treatment to realize rapid water cooling. The method effectively improves the mechanical properties and surface quality of the GH141 alloy cold-rolled sheet, meets the use requirements in a high-temperature environment, and has significant industrial application value.

This invention belongs to the field of high-temperature alloy smelting technology and relates to a method for preparing large-size GH4169 alloy electroslag remelting ingots. The method includes the following steps: first, raw materials corresponding to Ni, Fe, Nb, Cr, Mo, and C are mixed to obtain a first mixture; then, raw materials corresponding to Al, Ti, B, and P are mixed to obtain a second mixture; the first mixture is subjected to a first melting and refining process, followed by cooling and the addition of the second mixture for a second melting and refining process, and then cast to obtain an electroslag electrode. The surface of each electroslag electrode is polished, and then electroslag remelting is performed under a protective atmosphere using a five-element slag system. After cooling, a large-size GH4169 alloy electroslag remelting ingot is obtained. This invention effectively improves the compositional uniformity of large-size GH4169 alloy electroslag remelting ingots and increases the ingot yield by optimizing the slag system component ratio and matching the corresponding electroslag remelting process parameters.

The present application relates to residual stress detection technical field, especially to a kind of cutting method and application suitable for high-temperature alloy disc piece profile method residual stress test.The cutting method suitable for high-temperature alloy disc piece profile method residual stress test includes the following steps: (a) determining the position of profile cutting;(b) on the disc piece assembly supplementary block, so that the cutting surface of the disc piece in the cutting path direction The thickness remains consistent;(c) rigid hold is set on the two sides close to the cutting surface of the disc piece;(d) according to the determined cutting position, cutting is carried out using wire cutting technology.The cutting method of the present application, on the disc piece assembly supplementary block matched with the disc piece, so that the thickness of the disc piece on the cutting path always remains consistent, and the cutting section thickness does not mutate during cutting, ensuring accuracy.

The utility model relates to punch die technical field especially is convenient for positioning's flow -guiding ring punch die, including lower bottom plate, the top back side swing joint of lower bottom plate has the material baffle, the top middle part of lower bottom plate is equipped with the center column, the top swing joint of center column has the lower die assembly, the top swing joint of lower die assembly has the upper die assembly, the vertical center line alignment of center column, lower die assembly and upper die assembly. The device can punch the flow -guiding ring, can effectively punch the flow -guiding ring body, and can guarantee in the process of punching the flow -guiding ring, will not make the hole of ring body deviate and improve the punch pass rate, through the cooperation of upper die and lower die, can carry out side punch to high temperature alloy flow -guiding ring, the various positioning mechanism of step pin, guide pillar and guide bush, can greatly improve the positioning accuracy, make the side of flow -guiding ring when punching, can make the hole of side align.

The application provides a method for recycling valuable metals in waste nickel-based superalloy. The method comprises the following steps: sequentially performing alkaline degreasing treatment and acid deoxidation layer treatment on the waste nickel-based superalloy to obtain a to-be-treated material; mixing the to-be-treated material and a molten Mg-M alloy to perform an extraction reaction, and separating a nickel-cobalt eutectic body and an alloy residue after the reaction; M in the molten Mg-M alloy is an auxiliary metal; performing vacuum distillation on the nickel-cobalt eutectic body, and then performing acid leaching on the separated crude nickel-cobalt powder to obtain an acid leaching solution; purifying the acid leaching solution through a chelating type composite membrane to obtain a purified nickel-cobalt solution; performing stripping treatment on the purified nickel-cobalt solution to obtain a stripping solution, and performing evaporation concentration and reduction reaction on the stripping solution to obtain product-grade nickel-cobalt powder. The method provided by the application improves the recycling efficiency and product purity of valuable metals, realizes efficient recycling of nickel-cobalt resources in waste nickel-based superalloy, is low in cost, and is environmentally friendly.

The utility model relates to electric heating furnace technical field discloses a kind of discharging mechanism for electric heating furnace, including support frame, drive mechanism, conveyer belt and infrared thermometer, support frame is made of high-temperature-resistant alloy steel, the shock-absorbing foot pad is installed in support frame bottom;Drive mechanism includes servo motor, the reducer connected with the output end of servo motor, several rotating rollers driven by reducer, several rotating rollers surface are coated with high friction coefficient rubber layer;Conveyer belt is driven to run by rotating roller, support frame is made of high-temperature-resistant alloy steel, and the shock-absorbing foot pad of high-temperature-resistant silicon rubber material is installed in bottom, it is equipped with disc spring array inside, can adapt to high-temperature environment and absorb vibration, prolong equipment service life.Multiple layers of heat insulation board are embedded with electric heating wire, and electric heating wire is embedded between aerogel thermal insulation layer and silicon carbide ceramic plate in serpentine arrangement mode, which helps to improve heating efficiency and ensure the uniformity of heating.

This invention discloses a method for manufacturing an outer nozzle of a baffle nozzle with a sweating cooling function. The method uses high-temperature alloy powder as raw material and performs selective laser melting forming according to a preset laser scanning path and laser selective melting forming parameters to obtain the outer nozzle of the baffle nozzle with a sweating cooling function. The laser scanning path is determined based on a three-dimensional model, which is a ring-shaped periodic porous structure with sweating cooling. This invention utilizes the concept of sweating cooling in the outer nozzle of a liquid rocket engine baffle nozzle, using fuel as the cooling medium. As the fuel flows through the outer nozzle, it undergoes strong convective heat transfer with the nozzle. Simultaneously, a liquid film forms on the surface of the outer nozzle, hindering heat transfer between the outer nozzle and the high-temperature mainstream, thus achieving thermal protection of the outer nozzle and preventing ablation damage.

The present application relates to the technical field of high-temperature alloy casting, and particularly relates to a casting process of a large high-temperature alloy casting non-metallic patch. The casting process comprises the following steps: constructing a casting simulation model of the casting, and determining a hot spot position through numerical simulation; constructing a heating core model based on the characteristics of a heating material and a heating patch shrinkage slope of 1:5-8, and synchronously constructing a metal patch model with a heating patch shrinkage slope of 1:10; comparing the temperature gradient of the heating core model and the metal patch model through numerical simulation; when the temperature gradient of the heating core model is greater than that of the metal patch model and no shrinkage defect is displayed, the modularization parameters of the heating core are saved, otherwise the shrinkage slope parameters are iteratively adjusted until the standard is reached; the core box and the heating core are manufactured according to the modularization parameters; the heating core is positioned and fixed in the casting mold, and then pouring and cooling are performed. The non-metallic patch replaces the metal patch, improves the production efficiency of the large high-temperature alloy casting, and reduces the production cost.

The utility model provides a kind of smelting equipment for corrosion -resistant nickel-based high-temperature alloy casting production. The smelting equipment for corrosion -resistant nickel-based high-temperature alloy casting production includes: device main body, the control box is fixedly connected on the device main body, the hydraulic telescopic rod is installed on the control box, the hydraulic telescopic rod is fixedly connected with telescopic fixed block, the telescopic fixed block is provided with second pivot, the telescopic fixed block is rotatably connected with reverse limiting rod by second pivot, the reverse limiting rod is fixedly connected with guide boss, the guide boss is fixedly connected with arc guide plate, the arc guide plate is fixedly connected with horizontal plate, the horizontal plate is fixedly connected with rotating fixed block, first pivot is provided on the telescopic fixed block. The smelting equipment for corrosion -resistant nickel-based high-temperature alloy casting production provided by the utility model has the effect of improving discharging accuracy.

This invention proposes a high-entropy brazing filler metal, its preparation method, and its application for brazing ceramic matrix composites with GH4950 nickel-based superalloy. The alloy formula of this high-entropy brazing filler metal is Ni a Cr b Co c Fe d W e Al f Si g B h Mo i C j In the formula, a, b, c, d, e, f, g, h, and i represent the mass percentages of the corresponding components, satisfying the following conditions: a is 27.7–39.5, b is 19–22, c is 13–15, d is 13–15, e is 6–8, f is 3–4, g is 2.5–3.5, h is 2.3–2.6, i is 1.6–2.0, j is 0.1–0.2, and a+b+c+d+e+f+g+h+i+j=100. This high-entropy solder is atomized by arc melting plasma to obtain spherical powder, which is then made into a slurry powder and uniformly coated onto SiC using screen printing technology. f The surface of the SiC composite material is brazed with GH4950 nickel-based superalloy to obtain a safe and reliable SiC composite material. f The SiC-GH4950 heterogeneous brazed joint improves the metallurgical reaction of the joint seam, avoids excessive reaction of interfacial elements, and achieves a brazing strength that is significantly superior to existing technologies, showing broad application prospects.

The application discloses a silicon-based ceramic core with high-temperature shrinkage yielding performance and a preparation method thereof. The silicon-based ceramic core comprises a core matrix, a shrinkage yielding unit and an interface bonding layer, and the mass percentages of the three are 80-88wt%, 8-15wt% and 3-5wt% respectively. The preparation method comprises the following steps: preparing core matrix slurry, shrinkage yielding unit and interface bonding layer slurry; soaking the shrinkage yielding unit in the interface bonding layer slurry, taking out and drying to uniformly coat the outer surface of the shrinkage yielding unit with the interface bonding layer, then stirring uniformly in the core matrix slurry to prepare silicon-based ceramic core slurry; injecting the silicon-based ceramic core slurry into a ceramic core mold for filling and die casting to prepare a silicon-based ceramic core blank; and sequentially performing debinding and sintering on the silicon-based ceramic core blank to obtain the silicon-based ceramic core with high-temperature shrinkage yielding performance. The application realizes the consistency of the shrinkage curve of the ceramic core and the high-temperature alloy liquid during solidification.

The invention relates to a cobalt superalloy having (in % by weight): carbon (C): 0.04%-0.05%; chromium (Cr): 21.0%-23.0%; tungsten (W): 7.2%-8.2%; titanium (Ti): 0.05%-0.14%; aluminum (Al): 1.7%-2.7%; tantalum (Ta): 2.9%-3.6%; yttrium (Y): 0.01%-0.03%; nickel (Ni): 11.5% bis 13.5%; hafnium (Hf): 0.45%-0.65%; cobalt (Co): 49.0%-53.0%; zirconium (Zr): up to 0.02%; boron (B): up to 0.0014%; silicon (Si): up to 0.018%.

The embodiment of the application discloses a vacuum brazing method for a dissimilar high-temperature alloy guide brazing assembly, which comprises the following steps: assembling a guide made of dissimilar high-temperature alloy material to form a guide assembly; transferring the guide assembly into a vacuum furnace for vacuum brazing within a preset time; using high-temperature nickel-based filler metal BNi71CrSi in the vacuum brazing process to form a guide brazing assembly; after the vacuum brazing is completed, continuously performing two heat treatment processes in different ways on the guide brazing assembly within a preset time; respectively using fluorescence detection, metallographic detection and mechanical property detection to evaluate the brazing seam quality and brazing joint strength of the guide brazing assembly, and obtaining a high-temperature-resistant brazing joint with reliable performance. The application solves the existing vacuum brazing mode of the guide assembly, and the heat treatment process after the vacuum brazing is not matched, thereby leading to insufficient strength of the guide brazing joint and problems such as melting and cracking of the brazing seam.

The application discloses a kind of nickel-based superalloy for additive manufacturing and preparation method thereof, it is related to nickel-based superalloy technical field, by alloy powder atomization is screened into first particle size powder and second particle size powder, and respectively in vacuum environment executes degassing treatment, again mixed to form compound printing powder, so that first particle size powder forms main body powder laying structure, so that second particle size powder fills the intergranular gap between first particle size powder, and large-size void and continuous original particle boundary are more difficult to appear in the process of layer-by-layer melting forming of superalloy blank;Second particle size powder fills the intergranular gap between first particle size powder, two types of particle size powder reach the surface state matched with respective particle size before mixing, solve the problem that only from component design or post-forming heat treatment in traditional technology, and the state control of powder into molten pool before is insufficient, different particle size powder oxygen absorption difference and degassing difference are insufficient.