4655 results about "Plastic property" patented technology

The invention discloses a steel wire rod for a 2300-2360 MPa grade stress corrosion resistant steel strand, the steel strand and a preparation method. The steel wire rod comprises the following chemical components in percentage by mass: 0.85-0.91% of C, 0.3-1.0% of Si, 0.2-0.8% of Mn, 0.15-0.45% of Cr, 0.02-0.05% of V, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.004% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. The steel wire rod has excellent strength and plasticity, the ultrahigh strength of 2300 MPa or above can be obtained through drawing with a small area reduction rate, surface damage and internal defects of the steel wire rod during subsequent drawing machining are reduced, and the stress corrosion index of the steel strand is improved.

The invention discloses a steel wire rod for a 2200-2260 MPa grade ultrahigh stress corrosion resistance prestressed steel strand, the steel strand and a production method of the steel strand, and the steel wire rod comprises the following alloy components in percentage by mass: 0.83-0.89% of C, 0.60-1.40% of Si, 0.20-0.80% of Mn, 0.15-0.50% of Cr, less than 0.30% of Cu, less than 0.30% of Ni, less than 0.30% of Mo, 0.01-0.05% of V, 0.001-0.05% of Nb, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.0040% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities, through component design and a reasonable after-rolling controlled cooling process, the microstructure is refined, the sorbite rate is improved, high strength and plasticity are obtained with low carbon content, the drawing deformation can be reduced, material damage can be reduced, and the corrosion resistance of the steel strand is improved.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2200MPa-grade bridge cable and a manufacturing method of the high-strength complex-phase hot-rolled wire rod. After C-Si-Mn-Cr chemical components are rolled and spun into a wire rod, the wire rod is subjected to online molten salt critical quenching isothermal treatment, the wire rod is controlled to be subjected to front-section treatment and cooled at a cooling speed of greater than or equal to 38 DEG C / s, and enters a pearlite and martensite mixed phase region from an austenite state; the method comprises the following steps: firstly, carrying out heat treatment on austenite to promote transformation of part of austenite to sorbite and martensite, then carrying out post-treatment, reducing the circulation volume of molten salt, promoting transformation of austenite to pearlite, carrying out isothermal tempering, and finally carrying out roller way slow cooling, so as to prepare a hot-rolled wire rod of which the microstructure comprises a complex phase structure consisting of tempered pearlite, tempered sorbite, ferrite and tempered martensite, the composition system can be simplified, the deteriorated structure can be effectively controlled, complex-phase structure regulation and control and high-strength plastic performance matching are achieved, the tensile strength is 1568-1603 MPa, the percentage reduction of area is 29%-34%, and stable manufacturing of the bridge cable is facilitated.

The invention provides a macroscopic finite element simulation analysis method and device for a sealing element considering plastic deformation, and belongs to the field of sealing element design. The method comprises the following steps: acquiring an engineering stress-strain curve of a plastic material in a compression state; converting the engineering stress-strain curve into a real stress-strain curve; determining a yield limit, and taking a strain point corresponding to the yield limit as a demarcation point of elasticity and plastic deformation; an elastic section of a real stress-strain curve is extracted, the elastic modulus is calculated, and the Poisson's ratio is obtained through axial and transverse strain measurement in a uniaxial compression test; a true stress-strain curve plastic section is extracted, and a multi-linear isotropic hardening model is established; constructing a complete elastic-plastic constitutive model covering the elastic deformation area and the plastic deformation area; the stress distribution, the strain response and the contact performance of the plastic sealing element in a compression deformation state are simulated. According to the method and the device provided by the invention, the problem that the result does not conform to the reality due to the fact that only elastic modulus and Poisson's ratio are used in existing sealing element simulation can be solved.

The invention relates to a hot-rolled wire rod for a 2060MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod. Mn-Cr high-carbon chemical component design and rolling spinning are performed to form a wire rod, then online molten salt isothermal phase change treatment is performed, the wire rod is firstly subjected to front-section molten salt treatment and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure, and then the wire rod is subjected to rear-section molten salt treatment, so that the hot-rolled wire rod is obtained. The method comprises the following steps of: firstly, carrying out heat treatment on the residual austenite, promoting the unconverted residual austenite to be converted into a sorbite structure, simultaneously promoting isothermal tempering of the structure and fusing of a part of sorbite lamellas, and finally, slowly cooling through a roller way to prepare a hot-rolled wire rod of which a microscopic structure comprises a mixed structure consisting of tempered sorbite, tempered ferrite and fused sorbite, so that the material cost can be controlled; the high-strength and high-plasticity performance matching of the wire rod is improved, the tensile strength is 1370-1420 MPa, the percentage reduction of area is 35%-40%, and the mechanical property fluctuation is reduced, so that the wire breaking risk in stranded wire production is reduced, and efficient and stable production is promoted.

The invention relates to the technical field of metal plastic processing, and provides an integrated digital twinning large-specification bar rolling dynamic deformation distribution optimization method which comprises the following steps: constructing a digital twinning model in a large-specification bar rolling process; equipment state data, material parameters and process parameters in the rolling process are collected in real time, and the digital twin model is synchronously updated; based on the digital twinborn model, predicting strain field distribution, temperature field distribution, material metallographic structure performance and potential defect risk of the rolled piece in the current pass; with the minimum total rolling energy consumption, the highest size precision and the optimal structure uniformity as multiple objectives, deformation distribution parameters of subsequent passes are dynamically distributed through a hybrid optimization algorithm; and the optimized deformation distribution parameters are issued to a rolling mill control system to be executed, and model parameters are corrected based on online detection data feedback. In this way, the problems that in traditional rolling, due to strong experience dependence and poor dynamic working condition adaptability, efficiency is low, and many defects exist are solved.

The invention discloses a 340MPa grade P-containing hot-dip galvanized iron alloy high-strength IF steel, the chemical composition of which is as follows by weight: C: ≤0.003%, Si: ≤0.03%, Mn: 0.35-0.65%, P: 0.03-0.075%, S≤0.010%, Als: 0.020-0.045%, Nb: 0.008-0.015%, Ti: 0.02-0.03%, B: 0.0004-0.0010%, N≤0.0035%, and the remainder is Fe and unavoidable impurities; The elements also meet the following restrictions: calculated according to the corresponding weight percentage of each element, 10C+3N+2S≤Ti+2Nb≤12C+3N+2S, 60B≤P≤80B; the present invention adds P element to IF steel, and through composition and process optimization control, obtains a P-containing hot-dip galvanized iron alloy high-strength IF steel with a yield strength of 180-320 MPa, a tensile strength of 340-440 MPa, an elongation of 35-46%, a value (average plastic strain ratio) ≥1.8, high surface quality, high formability, and good cold brittleness.

The invention belongs to but is not limited to the technical field of aluminum alloy preparation, and discloses a high-plasticity aluminum alloy prepared from secondary aluminum and a preparation method, high-quality secondary aluminum waste is selected, and obvious impurities are removed; carrying out chemical or mechanical cleaning on the secondary aluminum, and sorting; the pretreated secondary aluminum waste is added into a smelting furnace to be smelted; a purifying agent is added for melt purification; the melt is further purified through inert gas stirring and standing; adding a proper amount of alloy elements into the melt; under the protection of inert gas, uniformly stirring the melt; casting the melt into a cast ingot by adopting a semi-continuous casting or continuous casting process; controlling the cooling speed; carrying out homogenizing heat treatment on the cast ingot to eliminate composition segregation in the cast ingot; and extruding and rolling to obtain the high-plasticity aluminum alloy material. According to the method, the purity of the aluminum alloy is improved, the performance uniformity is enhanced, and the aluminum alloy material with high plasticity and excellent mechanical performance is obtained and is suitable for industrial application with high requirements.

The invention relates to a 1200MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, after V-containing chemical components are designed, rolled and spun into a wire rod, the wire rod is subjected to online molten salt isothermal quenching treatment, and the wire rod is controlled to enter a bainite phase region from a high-temperature austenite state at a cooling speed greater than or equal to 32 DEG C / s; the steel wire rod with a microscopic structure comprising tempered bainite and ferrite is prepared through isothermal tempering, toughening and destressing treatment, carbide precipitation control and roller way cover opening and slow cooling, so that generation of deteriorated structures such as martensite can be avoided, the structure state can be effectively adjusted, strong plasticity matching of the steel wire rod is achieved, and the service life of the steel wire rod is prolonged. And the tensile strength is 1120-110MPa, the percentage reduction of area is 63-67%, and the steel is suitable for the application fields of manufacturing 1200MPa-grade high-strength tool steel and the like, and is favorable for being directly processed into tool parts after being subjected to cold processing molding.

The invention relates to a 1100MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, the wire rod adopts a middle-carbon Nb-V-containing chemical component design, after a steel billet is rolled and spun into the wire rod according to the spinning temperature of more than or equal to 860 DEG C, online molten salt semi-quenching isothermal treatment is performed, the wire rod is controlled to be subjected to front-section molten salt treatment, and then the steel wire rod is subjected to hot rolling and hot rolling to obtain the 1100MPa-grade high-strength tool steel wire rod. According to the method, the steel wire rod enters a bainite phase region from a high-temperature austenite state at the cooling speed of more than or equal to 30 DEG C / s to form a structure taking quenched bainite as a main component, and then is subjected to rear-section molten salt heating isothermal tempering and toughening destressing treatment, and finally is subjected to roller way slow cooling to prepare the steel wire rod with a microscopic structure comprising tempered bainite and ferrite, so that the material cost can be reduced, and the production efficiency is improved. The method has the advantages that martensite brittle structures are effectively avoided, the structure state of the hot-rolled wire rod is controlled, the plasticity and cold working performance of the wire rod are improved, the tensile strength of the product can reach 980-1030 MPa, the percentage reduction of area is 61%-66%, and the product can be directly machined into tool parts after cold forming.

The invention discloses preheating-free welding maritime work steel with excellent low-temperature toughness and a preparation method of the preheating-free welding maritime work steel, and belongs to the field of steel and iron material preparation. The produced steel plate has good comprehensive mechanical properties through alloy component-secondary rolling-controlled cooling process coupling design, the problem that the strength, plasticity, low-temperature toughness and preheating-free post-welding performance of the steel plate are difficult to match and harmonize is solved, the steel plate has ultrahigh-strength plasticity, excellent low-temperature toughness and excellent Z-direction performance, and room-temperature preheating-free welding can be achieved.

The invention provides a modified coal gangue-based large-flow-state grouting and water plugging material and a preparation method thereof. Comprising 80-90 parts of a coal gangue sample, 1-5 parts of Portland cement, 1-5 parts of sulphoaluminate cement, 0.51-3 parts of a polycarboxylic acid water reducing agent, 1-4 parts of cellulose ether with the viscosity of 200w, 0.1-5 parts of a calcium oxide expanding agent, 0.5-5 parts of a plastic expanding agent, 0.5-1 part of redispersible latex powder, 0.5-5 parts of polyacrylamide with the molecular weight of 1000 and water, and the water-material ratio is 0.4. According to the modified coal gangue-based large-flow-state grouting and water plugging material and the preparation method thereof, the cement consumption can be remarkably reduced, the cost is reduced, the utilization rate of solid wastes (such as coal gangue) is increased, and the material has good flow-state performance and adjustable setting time; the method is suitable for deep and large shaft surrounding rock water seepage treatment in coal mining and other mine engineering.

The invention discloses a forging method for improving plasticity of a large invar alloy steel ingot and invar alloy, and the forging method comprises the following steps: smelting molten steel by adopting an electric furnace, and casting to obtain the large invar alloy steel ingot with the weight of 15-25t; the cold-state invar alloy steel ingot is heated to 1000-1200 DEG C for heat preservation, and the heat preservation time is controlled to be longer than or equal to 10 h; the heated invar alloy steel ingot is subjected to three-heating-number upsetting and drawing-out, upsetting is conducted according to the rolling reduction of 15-50% of the total height of the invar alloy steel ingot in each heating number, the invar alloy steel ingot is drawn out to the height of the original invar alloy steel ingot after upsetting, and the invar alloy steel ingot is returned to a heating furnace to be heated and subjected to heat preservation after upsetting and drawing-out in each heating number; the final forging temperature of the last heating number is greater than or equal to 750 DEG C; and the invar alloy steel ingot subjected to heating and heat preservation in the last heating number is forged to the specified size, and then the invar alloy steel ingot is slowly cooled to the room temperature in air to obtain an invar alloy steel forging stock. The thermoplasticity of the large invar alloy steel ingot is improved, and the technical problem that the large invar alloy steel ingot is prone to cracking during forging is solved.

The cold heading wire rod comprises the following components in percentage by mass: 0.20%-0.26% of C, less than or equal to 0.35% of Si, 1.2%-1.6% of Mn, less than or equal to 0.02% of P, less than or equal to 0.005% of S, 0.04%-0.14% of V, 0.02%-0.10% of Nb, less than or equal to 0.2% of Cr, less than or equal to 0.1% of Ni, 0.02%-0.06% of Al and the balance of Fe and inevitable impurities, the V + Nb is greater than or equal to 0.09%, the C / 4 + Si + Mn / 2 + Cr / 2 + 2Ni is greater than or equal to 1.1% and less than or equal to 1.3%, the F + P is greater than or equal to 95%, the F grain size is greater than or equal to grade 12, the longitudinal pearlite strip The steel plate prepared by the method does not crack at 1 / 5 of a hot rolling state, can meet the requirements of a user on strength and plasticity of cold heading forming after 5-50% of cold drawing deformation, and can meet the requirements of a 10.9-grade high-strength fastener on fatigue and delayed fracture resistance at the same time.

The invention discloses a fluid-solid coupling analysis method, system and model for cross-scale evolution of an ocean structure. The method comprises the following steps: establishing a numerical wave water tank; establishing a plurality of reinforcement layer material RVE models, obtaining a macroscopic mechanical property curve of the reinforcement layer material, and obtaining a corresponding stress-strain constitutive relationship; based on the stress-strain constitutive relation, a reinforcing layer component model of the laminated structure is established, a light deformable layer component model of the laminated structure is established, and the reinforcing layer component model and the light deformable layer component model are assembled to obtain an overall laminated floating structure; and S100, merging the laminated floating structure into the numerical wave water tank in the step S100, carrying out fluid-solid coupling numerical simulation under the action of waves, judging the working condition of plastic deformation of the floating structure according to a result, and obtaining a plastic damage area and an elastic-plastic evolution response of the laminated floating structure. According to the method, the water elastic-plastic response of the large floating structure under the action of waves can be solved and optimized.

The invention relates to the technical field of equipment control optimization, in particular to an intelligent factory equipment energy efficiency optimization system which comprises the following steps: acquiring wall thickness distribution data of a steel pipe, local residual stress and a temperature gradient field in a straightening process; and a preset plastic mechanical model is used for calculating the actual yield strength and the theoretical straightening energy threshold value of each section of the steel pipe, so that a straightening parameter set of the steel pipe straightening machine is generated. And further correcting the straightening parameter set according to the temperature gradient field so as to optimize and eliminate energy consumption. A steel pipe straightening area is divided, a heat sensitive area and a low-temperature hardening area are identified, correction weights are distributed according to the area difference of the areas, then a corrected straightening parameter set is generated, and the straightening process of the steel pipe is optimized.

The invention belongs to the field of grouting materials, and discloses a composite grouting material as well as a preparation method, a construction method and application thereof. The composite grouting material comprises the following components: sulphoaluminate cement clinker powder, Portland cement clinker powder, a reinforcing agent, a coagulant and a modifier, the reinforcing agent comprises superfine mineral powder, superfine fly ash, silica fume and calcium sulfate whiskers; the coagulant comprises alumina clinker powder, calcium hydroxide, lithium carbonate and aluminum hydroxide; the modifier comprises a shrinkage reducing agent, a thickening agent, a water reducing agent and a retarder. The composite grouting material has the advantages of being good in pumpability, short in gelation time, free of plastic shrinkage, high in early strength, good in volume stability, high in durability, appropriate in price, environmentally friendly, free of toxicity and the like, and the requirement for rapid grouting maintenance is met in the subway operation window period.

The invention relates to a hot-rolled wire rod for a 2100MPa-grade stranded wire and a manufacturing method thereof, after a high-carbon and high-silicon component system is rolled and spun into a wire rod, the wire rod is cooled at a cooling speed of more than or equal to 31 DEG C / s through online molten salt sorbite regulation and control treatment, and enters a sorbite phase region from an austenite state; the method comprises the following steps of: forming a structure mainly comprising a sorbite structure, performing isothermal tempering, promoting fusing of a part of sorbite lamellas, and finally performing roller way cover opening and slow cooling to prepare the hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, tempered ferrite and fused sorbite, so that alloy components can be simplified, and the strong plasticity matching and the structure uniformity of the wire rod can be improved; the tensile strength is 1420-1470 MPa, the percentage reduction of area is 36%-41%, the composite material is used for the application field of manufacturing 2100 MPa grade stranded wires and the like, off-line heat treatment can be avoided, and the risk of wire breakage during downstream drawing and twisting is reduced.

The invention discloses a dissimilar metal friction welding interface regulation and control layer and an aluminum steel friction welding method. The dissimilar metal friction welding interface regulation and control layer comprises a micro-texture arranged on the metal surface, paste is laid at the micro-texture, and non-metal substances in the paste are completely volatilized before dissimilar metal metallurgical bonding; the welding method comprises the steps that a microstructure is prepared in a designated area on the surface of a stainless steel plate, Zn-20Al powder and ethyl alcohol are mixed and stirred into paste, then the paste is evenly laid on the microstructure area on the surface of base metal, and then friction stir welding is conducted. A welding joint obtained through the scheme is good in toughness (plasticity) and high in strength, atomic-level tight combination of a joint interface is achieved, the mechanical property of the joint is excellent, the joint is free of air hole and crack defects, the adverse effect of brittle intermetallic compounds on the mechanical property is weakened, the wetting spreading performance and the element diffusion capacity of the interface are enhanced, and the welding quality is improved. The obtained welding joint has a good mechanical embedding characteristic.

The invention discloses biomass-based water-plastic plastic as well as a water-plastic forming method, preparation and application thereof, the water-plastic plastic is plastic which can be formed and processed only by utilizing water, and the water-plastic forming method mainly comprises the following steps of water treatment, shape editing and shape fixing of the biomass-based water-plastic plastic. According to the scheme, the plastic can be repeatedly edited into various one-dimensional, two-dimensional or three-dimensional shapes, expensive and complex instruments and equipment are not needed, the high-energy-consumption process such as high temperature and high pressure is avoided, the application scene of the plastic is expanded, and the service life of the plastic is prolonged; the method is a plastic molding processing method which is simple to operate, low in energy consumption, low in cost, green, environment-friendly and carbon-reducing. The biomass-based water-plastic plastic is prepared from biomass which is rich in reserves, low in cost, sustainable, renewable, biodegradable and good in biocompatibility, generally has good mechanical properties and transparency, and can be widely applied to various fields.

The utility model relates to the technical field of square tube processing, and discloses an extrusion plastic device for square tube forming processing, which comprises an extrusion bin, a square tube is movably arranged in the extrusion bin, and a motor I is fixedly mounted on the outer wall of the front side of the extrusion bin. According to the device, the extension block is driven by the operation of the second motor to push the second extrusion roller, the distance between the first extrusion roller and the second extrusion roller is further increased, the pressing plate moves downwards through the operation of the air cylinder, and the height of the first extrusion roller and the height of the second extrusion roller are further adjusted. The extrusion width of the extrusion molding mechanism is adjusted through the arrangement of the extrusion molding mechanism, and then the extrusion width of the extrusion molding mechanism is adjusted through the arrangement of the lifting mechanism, so that the workload is effectively reduced, the device can be adjusted during extrusion, the working efficiency is improved, and the time is saved.

The invention belongs to the technical field of alloy steel, and relates to composite reinforced high-toughness steel and a preparation method thereof. The steel comprises the following chemical components in percentage by weight: 6.0%-9.4% of Ni, 7.6%-8.9% of Co, 0.8%-3.8% of Cr, 1.0%-2.6% of Mo, 0-0.9% of W, 0.05%-0.60% of V, 0-0.10% of Nb and the balance of Fe. C and Al are added to serve as strengthening elements, and the balance is Fe and impurity elements. When 0.14% < = C < 0.20%, 1.2% < = Al < = 1.6%, 1.0% < = Mo + W / 2 < = 2.0%; when 0.20% < = C < = 0.35%, 0.6% < = Al < = 1.3%, and 2.0% < = Mo + W / 2 < = 3.0%. The alloy is subjected to vacuum induction melting or multi-time melting, homogenizing diffusion annealing and forging rolling to form a material, so that the tensile strength of the steel reaches 2200-2350 MPa or above, the yield strength reaches 2000-2150 MPa or above, and the steel has excellent strength, plasticity and toughness matching and can be used for components such as engine shafts, aircraft landing gears, high-performance shells, frame beams and molds.

The invention relates to a hot-rolled wire rod for a 2400 MPa bridge cable and a manufacturing method of the hot-rolled wire rod, after high-carbon components of Cr-Mo-V are rolled and spun into a wire rod, the wire rod is subjected to online molten salt rapid cooling isothermal treatment, so that the wire rod is cooled at the cooling speed of more than or equal to 32 DEG C / s and enters a sorbite phase region from an austenite state to form a structure taking sorbite as a main part, and precipitation and growth of carbides are controlled; and finally, roller way slow cooling is conducted, the hot-rolled wire rod with the microscopic structure comprising a mixed structure composed of tempered sorbite, ferrite and fused pearlite is prepared, the strength and plasticity matching performance of the wire rod can be improved, the mechanical property fluctuation can be reduced, the tensile strength can reach 1640-1680 MPa, the percentage reduction of area can reach 27%-32%, the mechanical property same-circle difference is smaller than or equal to 45 MPa, and the tensile strength of the wire rod can reach 1640-1680 MPa, the percentage reduction of area can reach 27%-32%, and the mechanical property same-circle difference is smaller than or equal to 45 MPa. And rapid and stable production is facilitated, the method is used for manufacturing the 2400 MPa bridge cable, and the wire breaking risk can be reduced easily.

The invention relates to a method for simulating fatigue small crack propagation of a polycrystalline metal material. The method comprises the following steps: determining a crystal plastic constitutive model and accurate values of all undetermined parameters of the crystal plastic constitutive model; establishing a crack propagation finite element model of the polycrystalline metal material, and embedding the crystal plasticity constitutive model of which each undetermined parameter has a respective accurate value and a pre-obtained crack propagation criterion into the crack propagation finite element model; applying load and boundary conditions to the crack propagation finite element model, and performing crack propagation finite element analysis to obtain a finite element analysis result, including stress-strain data calculated based on the crystal plasticity constitutive model and crack propagation data calculated based on a crack propagation criterion and the stress-strain data. According to the method for simulating the fatigue small crack growth of the polycrystalline metal material, the Hall epicy size effect is introduced into the crystal plasticity constitutive model to consider the influence of the grain size on the sliding resistance, so that the simulation accuracy is improved.

The invention belongs to the technical field of high-performance cutter coatings, and relates to a cross-scale bionic gradient coating design method based on a multi-principal-element high-entropy system, which comprises the following steps: sequentially forming a high-entropy alloy plastic layer, a high-entropy alloy / high-entropy ceramic tough layer and a nanocrystalline high-entropy ceramic superhard layer on the surface of a cutter matrix, and constructing a gradient transition structure; the method comprises the following steps: matching a high-entropy alloy plastic layer with a tool matrix binding phase, optimizing a high-entropy alloy / high-entropy ceramic tough layer material, improving interface binding force, optimizing gradient transition design by adopting thermal-mechanical coupling calculation, constructing an atomic model, simulating and optimizing a microstructure based on molecular dynamics, and establishing a finite element model to simulate thermal cycle and mechanical load. The interface performance is optimized, a mathematical model is constructed through a BP neural network and a particle swarm optimization algorithm, and gradual transition design of the tool base body and the coating is achieved. The problems that the tool coating interface is high in brittleness, insufficient in adhesiveness, limited in thermal stability and the like are solved, and the bonding performance of the coating interface and the stability and durability of the coated tool are improved.

The invention discloses a high-strength high-temperature alloy and a preparation method thereof. The high-strength high-temperature alloy comprises a high-temperature alloy matrix and rare earth oxides dispersed and distributed in the high-temperature alloy matrix. The high-temperature alloy matrix is GH4169, and the high-temperature alloy matrix is made of The rare earth oxide is one or two of La2O3 and Ce2O3, the particle size of the rare earth oxide is 50-500nm, and the total adding amount of the rare earth oxide is 0.02-0.03% of the mass of the alloy; the preparation method of the high-strength high-temperature alloy comprises the following steps: (1) preparing rare earth oxide particles; (2) charging and smelting rare earth oxide particles and alloy raw materials in a vacuum induction furnace, and casting into ingots after the components are qualified; (3) electroslag remelting: adding analytically pure rare earth oxide into a slag system; and (4) the electroslag ingot is subjected to homogenization, forging and solid solution aging treatment, and then the alloy is obtained. According to the method, the strength and plasticity of the high-temperature alloy are improved.

The 430-series stainless steel has good corrosion resistance and oxidation resistance, and is widely applied to the fields of buildings, decoration, household appliances, kitchen ware and the like due to the excellent performance and relatively low price of the 430-series stainless steel. As cover annealing is not carried out on 430, and the 430 is directly subjected to acid pickling and cold rolling through air cooling after hot rolling, adverse factors which influence cold rolling, such as edge cracking, high hardness of heads and tails, high strength and the like, are easy to occur in cold rolling. According to the annealing-free direct rolling method for the low-cost 430 stainless steel, slow cooling and heat preservation are conducted on the hot-rolled 430 stainless steel, the microscopic structure of the 430 stainless steel has the obvious grain recovery characteristic, the yield strength and tensile strength are reduced, the hardness is reduced, the plasticity is improved, the problems that the low-cost 430 stainless steel is high in hardness and poor in plasticity due to the fact that annealing is not conducted can be remarkably solved, cold rolling is better facilitated, and the service life of the low-cost 430 stainless steel is prolonged. And after slow cooling treatment, the problems of edge cracking, difficult rolling and the like do not occur in the cold rolling process of 430. The slow cooling heat preservation cover has an improvement effect on solving the problem of low-cost rolling 430 in the cold rolling process, and development of a low-cost cover-free annealing process and trial production of new products are facilitated.

This invention discloses a stainless steel welding wire for repair welding of martensitic stainless steel turbine runners, its preparation method, and its application, belonging to the field of metal welding material preparation technology. The chemical composition of the welding wire provided by this invention, expressed as a percentage by weight, is: C≤0.03%, Si: 0%~0.6%, Mn: 5.0%~8.0%, S≤0.010%, P≤0.020%, Cr: 12.5%~15.5%, Ni: 5.0%~7.0%, Mo: 1.0%~2.0%, with the balance being Fe and impurities. The welding wire provided by this invention is suitable for repair welding of Cr13Ni4~6 type martensitic stainless steel, and post-weld heat treatment is not required. The weld metal produced by this welding wire exhibits good strength, plasticity, and toughness, with a tensile strength ≥750MPa, elongation after fracture ≥35%, and impact absorption energy at -40℃ ≥120J.

The invention relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which comprises the following steps of: acquiring dynamic characteristic data in a forging process in real time by acquiring multi-dimensional material performance parameters, and constructing a multi-target collaborative optimization model; and intelligent collaborative configuration of the reduction rate parameters is realized by adopting a self-adaptive weight distribution strategy. And a thermal coupling factor normalization equation and a phase field free energy functional normalization model are established, and the technical problems that in a traditional forging process, due to empirical configuration of reduction rate parameters, the structure is uneven, and residual stress exceeds the standard are solved. A lightweight model is deployed through edge computing nodes, millisecond-level dynamic correction of an optimization scheme is realized in combination with a 5G industrial private network, and the grain size qualification rate and the size precision of the titanium alloy forgings are improved. The method improves the yield of the grain size of the forge piece, ensures that the residual stress of the forge piece is reduced, stably controls the size precision, and improves the batch stability of high-end titanium alloy parts.

The invention relates to the technical field of metal material processing engineering, discloses a full-automatic full-process modeling method and system of crystal plasticity finite element model for laser welding weld, which adopts MATLAB to call ABAQUS and PYTHON for co-simulation programming. In this text, a full-automatic modeling method of the crystal plasticity finite element model for laser welding weld is proposed, and a one-key crystal plastic finite element model for laser welding weld is established based on EBSD experimental data. In addition, the full-process full-automatic modeling method of crystal plastic finite element for laser welding weld is universal, and can be used for the establishment of the crystal plasticity finite element model for the microstructure of the base material of aluminum alloy, titanium alloy, magnesium alloy, stainless steel and other materials.