56 results about "Hardening effect" patented technology

The invention discloses a multi-scale multi-deep neural network driven metal material fatigue life prediction method. The method comprises the following steps: constructing a metal material fatigue test data set; adding the maximum normal stress of the critical plane into a data set by considering the additional hardening effect of the metal material under a non-proportional load, and preprocessing the data set; establishing a multi-scale multi-depth neural network framework; considering physical constraint to guide neural network training so as to increase prediction precision, and establishing a physical loss function with soft regulation capability; building a metal material fatigue life prediction model driven by the multi-scale multi-depth neural network based on the multi-scale multi-depth neural network framework and the physical loss function; continuously iteratively optimizing the model to obtain an optimal prediction model; and predicting the fatigue life of the metal material by using the optimal prediction model. The method not only has the advantage of high prediction precision, but also can enhance the stability and generalization ability of the prediction precision.

The invention belongs to the technical field of metal part surface modification, and relates to a composite strengthening method for a carburized surface of a high-bearing gear of an aero-engine. According to the method, high-hardness and high-density ceramic shots are adopted as media for high-energy mechanical shot peening strengthening, the advantage that the subsurface strain hardening effect of the contact strengthening technology is good and the barb-shaped distribution characteristic of mechanical shot peening residual compressive stress are utilized, extremely high residual compressive stress is introduced to the subsurface position, and the contact fatigue performance of the tooth surface of the gear is improved. High-frequency laser shot peening strengthening is used for secondary treatment, so that the surface layer of the material is subjected to plastic deformation, high-amplitude residual compressive stress is introduced into the surface layer of the material within the depth range of more than 500 microns by utilizing the advantage of large influence depth of laser-induced shock waves, and the residual compressive stress can inhibit fatigue crack initiation, has a certain depth and inhibits fatigue crack propagation; and the bending fatigue resistance of the root of the gear can be effectively improved. And an abrasive flow process is adopted, so that the roughness is reduced to be more than 0.4 mu m.

The invention discloses a welding material, a welding material, application and a preparation method, and the welding material comprises the following raw materials by weight percent: 1%-3% of Si, 1.2%-3.2% of Mg, 1%-3.6% of Zn, 0.6%-1.6% of Cu, 0.5%-0.8% of Mn, 0.2%-0.45% of Cr, 0.1%-0.25% of Ti, 0.05%-0.1% of Zr, 0.05%-0.1% of Sc, and the balance of Fe. 0.2%, and the balance being Al and inevitable impurities. By regulating and controlling the contents of Zn, Cu, Mg and Si elements, the precipitation enthalpy of a nanoscale strengthening phase is reduced, so that the bake hardening effect of a welding seam is improved, and the problem that the welding seam is excessively softened due to melting of the nanoscale precipitation phase is solved. In addition, the Fe-containing brittle phase characteristic in the weld joint is improved by adding Mn and Cr elements, and the hot crack tendency of the weld joint is reduced by combining Zr, Sc, Ti and other grain refinement elements, so that the strength and toughness of the weld joint are further improved.

The invention relates to a heat-treated high-yield aluminum alloy material for die casting and a preparation method thereof in the technical field of cast aluminum alloy materials, the heat-treated high-yield aluminum alloy material for die casting comprises Si, Al, Fe, Mg, Zn, Ti, Zr and Sr, the components are weighed according to the mass percent, and meanwhile, the preparation method of the heat-treated high-yield aluminum alloy material comprises the steps that 1, raw materials are weighed; 2, melting the raw materials; step 3, ultrasonic stirring; step 4, casting the molten liquid; the aluminum alloy material is obtained through heat treatment, grain refinement is facilitated, the corrosion resistance of an aluminum alloy plate is improved, meanwhile, recrystallization of the alloy in the deformation and heat treatment process can be restrained, the work hardening effect of the alloy can be kept by restraining recrystallization, deformation is restrained, and the aluminum alloy material has the characteristic of high yield degree.

The invention discloses steel for high-manganese steel cutter teeth and a preparation method of the steel, and belongs to the technical field of steel for dredging equipment. The technical problem that the service life of existing steel for reamer teeth is short due to poor wear resistance and low strength is solved. The steel for the high manganese steel cutter teeth comprises the following components in percentage by mass: 0.95 to 1.35 percent of C, 0.30 to 0.80 percent of Si, 11.0 to 14.0 percent of Mn, less than or equal to 0.070 percent of P, less than or equal to 0.030 percent of S, 0.20 to 0.30 percent of Mo, 0.020 to 0.030 percent of Cr, 0.01 to 0.2 percent of Nb and the balance of Fe and inevitable impurities. When the steel for the high-manganese steel cutter teeth is subjected to an impact load, the surface can generate an extremely strong work hardening effect, so that the surface wear resistance is greatly improved, and the core part still keeps high toughness.

The invention relates to a copper material hot forging-cold heading composite technology based on an integrated forming device, and relates to the field of conductive copper part machining, the copper material hot forging-cold heading composite technology comprises the steps of feeding and heating, hot forging primary forming, collaborative switching, cold heading final forming, discharging and the like, in the collaborative switching step, an integrated driving mechanism has different driving modes, and a temperature control step is arranged between the hot forging step and the cold heading step. The temperature is controlled through the water-cooling heat insulation plate, the cold air nozzle and the like, the punch and the pressing block are controlled to work alternately through the hydraulic cylinder, and all the steps are coordinated through the PLC control system. The copper material hot forging-cold heading composite technology integrated forming device achieves the technical effects that copper material hot forging-cold heading composite technology integrated forming is achieved, the workpiece temperature is effectively controlled, the shaping and hardening effects are guaranteed, and the production efficiency and the product quality are improved.

The invention discloses a method for preparing a net-shaped heterostructure nickel-based coating through laser cladding, and belongs to the technical field of laser cladding, and the method comprises the following steps: pre-arranging nickel-based alloy powder on the surface of a Q235 steel substrate by using absolute ethyl alcohol and a mold, and after drying, carrying out single-pass cladding by using a laser cladding technology to obtain the net-shaped heterostructure nickel-based coating. A nickel-based coating with a net-shaped heterostructure is manufactured on the surface of the Q235 steel substrate; wherein Mo2C and Ni2Si are generated through a laser in-situ reaction, a reinforcing phase is distributed in a three-dimensional network shape along a crystal boundary to form a network heterostructure, the effect of refining crystal grains is achieved by adding the reinforcing phase, and the strength of the coating is effectively improved; the net-shaped heterostructure has heterogeneous deformation induction (HDI) strengthening and hardening effects, and the strength and ductility of the coating material can be effectively improved through combination of multiple strengthening mechanisms.

The invention discloses a reconstituted aluminum alloy material obtained by recycling waste aluminum templates and a preparation method of the reconstituted aluminum alloy material. The reconstituted aluminum alloy material obtained by recycling the waste aluminum templates comprises the following chemical components in percentage by mass: 0.05-0.20% of Cu, 0.50-0.70% of Si and Znlt. The aluminum alloy comprises 0.10% of aluminum, 0.04%-0.17% of Mn, 0.70%-0.90% of Mg, 0.15%-0.50% of Fe, 0.05%-0.20% of Cr, 0.01%-0.07% of Ni, 0.01%-0.07% of V, smaller than or equal to 0.05% of Ti and the balance aluminum and impurity elements, each impurity element is smaller than or equal to 0.05%, and the total content is smaller than or equal to 0.20%. The sum of the mass fractions of Mg, Si and Cu is 1.6-1.8%, the mass fraction ratio of Mg to Si is 1.2-1.5, the sum of the mass fractions of Fe, Mn and Cr is 0.35-0.65%, the mass fraction ratio of (Mn + Cr) to Fe is 0.35-0.65, meanwhile, trace elements such as Ni and V are added, a super grain refiner is adopted, and the grain structure and the morphology / size / distribution of a second phase are optimized by combining regulation and control such as casting, homogenization and extrusion processes. And it is ensured that the aluminum bar still has excellent extrudability and uniform deformability under the high impurity tolerance, and the obtained aluminum profile is bright in surface and good in age hardening effect.

The invention belongs to the technical field of ceramic material preparation, and particularly relates to a preparation method of a TiC particle / Al2O3 ceramic cutter. According to the method, TiC particles, nanoscale Al2O3 powder and MgO powder are used as raw materials, and the ceramic is prepared through the processes of ceramic mixed powder preparation, blank preparation through oscillation pressure sintering, grinding and polishing and blank forging and pressing through oscillation pressure. According to the TiC particle / Al2O3 ceramic cutter prepared by the method, the grain boundary is further strengthened and the dislocation density in the grains is increased while the fine grain hardening effect is maintained, so that the bending strength and the fracture toughness of the material are enhanced while a sample is maintained in a high-hardness region.

The application relates to a kind of additive manufacturing material anisotropy degree calculation evaluation method and system, comprising: preparing original sample based on the object to be evaluated;Select part of sample in original sample to be irradiated, obtain irradiated sample;Nanoindentation test is carried out to unirradiated sample and irradiated sample, and the relationship curve of indentation depth and nano-hardness is obtained;Extract characteristic nano-hardness value;According to the characteristic nano-hardness value, the relative irradiation hardening rate of different orientation surfaces and the relative irradiation hardening rate of different deposition surfaces are obtained;According to the relative irradiation hardening rate of different orientation surfaces and the relative irradiation hardening rate of different deposition surfaces, the anisotropy degree factor of hardening effect is obtained;The anisotropy degree of the object to be evaluated is evaluated based on the anisotropy degree factor.The application is more suitable for SLM additive manufacturing of small batch materials or workpieces, and the anisotropy can be quantitatively evaluated, which helps to guide and optimize related material additive process technology.

The invention discloses low-cost hot-dip galvanized high-strength steel for a new energy automobile and a production method thereof, and belongs to the technical field of automobile steel. The high-strength steel comprises the following chemical components in percentage by mass: 0.02 to 0.06 percent of C, 0.06 to 0.15 percent of Si, 0.2 to 0.5 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.013 percent of S, 0.02 to 0.05 percent of Alt, 0.01 to 0.03 percent of Nb, 0.02 to 0.04 percent of Ti, 0.002 to 0.003 percent of B, 0.005 to 0.015 percent of N and the balance of Fe and inevitable impurities. The production method comprises the procedures of steelmaking, hot rolling, acid rolling and galvanizing. The bake hardening value BH2 of the high-strength steel is 50-65 MPa, the geometric must dislocation GND density of a steel-based structure under a 500-time field of view is 5 * 10 < 5 >-10 < 10 > / m < 2 >, and the high-strength steel has an excellent bake hardening effect and high plasticity.

The utility model discloses a bridge anti -collision device based on the coupling of shear hardening and negative poisson's ratio effect, including a plurality of energy -absorbing box and a plurality of fixed ring, a plurality of energy -absorbing box evenly is placed in the outside of pier and is closely spliced between adjacent energy -absorbing box, a plurality of fixed ring is evenly placed on the outer ring surface of pier and is in the embrace shape, and the fixed ring between adjacent is closely connected to be connected into a whole around pier, and the energy -absorbing box is buckled on the outside of fixed ring, and the bolt for fixing energy -absorbing box and fixed ring is inserted between energy -absorbing box and fixed ring from top to bottom, the utility model relates to building safety protection technical field, through the collaborative energy -absorbing mechanism of the introduction of negative poisson's ratio effect and shear hardening effect, the bridge anti -collision device of structure stable, energy -absorbing efficient has been constructed, and simultaneously through the modularization and the bolt type design, the quick dismounting and partial replacement function of device have been realized, and maintenance difficulty and cost have been reduced, have good engineering applicability and popularization prospect.

The invention relates to a method for predicting the creep performance of oxide dispersion strengthened (ODS) steel under high temperature and high irradiation conditions. A complex crystal plasticity constitutive model is developed to accurately predict the performance of ODS steel in terms of irradiation hardening and creep behavior, which incorporates the spatial distribution of voids and oxides. This developed model is highly consistent with experimental data at different temperatures and irradiation doses, demonstrating its strong robustness. As the irradiation dose increases, the yield stress of irradiated ODS steel also increases. The yield strength of ODS steel shows a linear relationship with the irradiation dose, which initially increases with the increase of irradiation dose and then decreases. The void size steadily increases, while the void spacing initially decreases and then increases. Therefore, the void hardening effect gradually weakens after the initial enhancement. In contrast, as the irradiation temperature increases, the yield strength decreases due to the expansion of the void spacing at higher temperatures. The creep rate of irradiated ODS steel is nonlinearly related to the irradiation dose. ODS steel irradiated at low or high doses has relatively poor creep performance and exhibits a higher creep rate under low applied stress. In contrast, at moderate doses, the creep performance is better due to the small number of irradiated voids and high strength of oxide particles. And spherical voids exhibit better creep resistance, and the void spacing has a more significant impact on the creep performance than the void size. At low and high doses, the creep performance decreases as the irradiation temperature increases, and in addition, at lower doses, the effect of irradiation temperature on creep performance is not as significant as at higher doses. This invention provides an efficient theoretical method for accurately evaluating the irradiation performance of ODS steel under complex environments.

The invention provides a high-entropy alloy gradient reinforced secondary aluminum composite material, the composite material takes secondary aluminum as a matrix, a reinforced phase of a gradient material is formed by a high-entropy alloy and a ceramic material, and the reinforced phase is of a three-layer structure and comprises a high-entropy alloy middle layer and a ceramic material and high-entropy alloy composite layer arranged on the two opposite sides of the middle layer; preferably, the high-entropy alloy is prepared from 15 to 25 parts of Mn, 15 to 20 parts of Mo, 15 to 20 parts of Cu, 15 to 20 parts of Be, 15 to 20 parts of Mg and 10 to 25 The high-entropy alloy serves as a gradient reinforcement phase, a continuous transition layer from high strength to high toughness is formed in a secondary aluminum matrix, the inherent defects of secondary aluminum are overcome, and the overall performance is improved through the strain hardening effect of a gradient structure.

The invention relates to an additive manufacturing material anisotropy degree calculation and evaluation method and system. The method comprises the steps that an original sample is prepared based on a to-be-evaluated object; partial samples in the original samples are selected for irradiation, and irradiation samples are obtained; carrying out nanoindentation test on the non-irradiated sample and the irradiated sample to obtain a relation curve of indentation depth and nano hardness; extracting a characteristic nano hardness value; calculating according to the characteristic nano hardness value to obtain the relative irradiation hardening rates of different orientation surfaces and the relative irradiation hardening rates of different deposition surfaces; calculating according to the relative irradiation hardening rates of the different orientation surfaces and the relative irradiation hardening rates of the different deposition surfaces to obtain an anisotropy degree factor of the hardening effect; and evaluating the anisotropy degree of the to-be-evaluated object based on the anisotropy degree factor. The method is more suitable for small-batch materials or workpieces formed through SLM additive manufacturing, anisotropy can be quantitatively evaluated, and related material additive process technologies can be guided and optimized.

The present invention provides a method for manufacturing low-cost, high-density titanium alloy products. It utilizes coarse-grained titanium powder or titanium alloy powder with a D50 particle size of 20-25 μm as a raw material for metal powder injection molding, resulting in low cost. By mixing in copper powder with a D50 particle size of 8-10 μm, achieving a mass ratio of titanium powder or titanium alloy powder to copper powder of 90-99.9:10-0.1, the method leverages the low eutectoid transformation temperature and high solid solubility of copper to lower the phase transformation temperature of β-titanium alloy and refine its grain structure, resulting in a columnar crystal structure. The structure transforms into an equiaxed crystal structure, thereby increasing density, reducing porosity, and improving appearance. At the same time, due to the rapid diffusion of copper in titanium, a very fine eutectoid microstructure can be generated. When copper-containing high-temperature β-titanium alloys are cooled, a eutectoid reaction occurs to generate α-titanium alloys and compounds of TiCu2 and Ti2Cu. The solid solubility of copper in α-titanium alloys decreases significantly with decreasing temperature. Furthermore, TiCu2 has better thermal stability, and Ti2Cu has precipitation hardening effect, which can significantly improve the heat strengthening and hardness of the product.

The application discloses a numerical simulation method of a viscoelastic nonlinear dielectric elastomer constitutive model, constructs a free energy function of a dielectric elastomer considering a strain hardening effect; obtains a super-elastic constitutive model of the dielectric elastomer according to the free energy function of the dielectric elastomer; based on the obtained super-elastic constitutive model, introduces viscoelasticity of the dielectric elastomer material, and constructs a visco-hyper-elastic constitutive model of the dielectric elastomer; based on the constructed visco-hyper-elastic constitutive model, finite element simulation is carried out on a driver or a sensor structure with the dielectric elastomer as the material to carry out numerical simulation, and electromechanical stability and dynamic response of the dielectric elastomer structure are obtained, thereby laying a theoretical foundation for structure design of the dielectric elastomer. The application provides a new method for accurately calculating critical instability voltage of a complex dielectric elastomer structure, and also provides a possibility for accurately simulating dynamic behaviors of the dielectric elastomer.

The present invention discloses a method for predicting the fatigue life of metal materials driven by a multi-scale, multi-depth neural network. The method comprises the following steps: constructing a metal material fatigue test dataset; considering the additional hardening effect of metal materials under non-proportional loads, adding the maximum normal stress of the critical plane to the dataset, and preprocessing the dataset; establishing a multi-scale, multi-depth neural network framework; considering that physical constraints can guide neural network training to increase prediction accuracy, and establishing a physical loss function with soft adjustment capabilities; building a multi-scale, multi-depth neural network-driven metal material fatigue life prediction model based on the multi-scale, multi-depth neural network framework and the physical loss function; continuously iteratively optimizing the model to obtain an optimal prediction model; and using the optimal prediction model to predict the fatigue life of the metal material. The present invention not only has the advantages of high prediction accuracy, but also enhances the stability and generalization of prediction accuracy.

This invention provides an ultra-high strength, low density Al-Mg-Zn-Sc-Zr-based alloy and its preparation method, belonging to the field of aluminum alloy material technology. The ultra-high strength, low density Al-Mg-Zn-Sc-Zr-based alloy provided by this invention, by mass fraction, has the following chemical composition: Mg 3.0~8.0%, Zn 1.0~5.0%, Cu 0.4~1.0%, Mn 0.1~0.8%, Ag 0.05~0.3%, Sc 0.01%~0.3%, Zr 0.05~0.3%, with the balance being Al. This invention achieves this by precisely controlling the elemental ratios of Mg, Zn, Cu, and Ag, resulting in an alloy that maintains its low density while exhibiting a strong age-hardening effect. Simultaneously, the reasonable addition of trace elements such as Mn, Sc, and Zr enables the alloy to possess a dispersion strengthening effect. Combined with heat treatment and hot deformation processes, this further improves the strength and ductility of the aluminum alloy.

This invention discloses a short-process preparation method for a high-strength, high-conductivity Cu-Ag-Sn copper alloy, belonging to the technical field of high-performance copper alloy materials. The alloy, by mass percentage, comprises: Ag: 0.03%–0.05%, Sn: 0.005%–0.05%, total impurities ≤0.01%, and the balance being Cu. The preparation method completely abandons the traditional homogenization annealing and solution treatment processes, comprising only three core steps: continuous casting to obtain an alloy ingot; cold drawing deformation of the ingot with a total deformation of 75%–85%; and subsequent anomalous hardening annealing at 240℃–260℃ for 30–120 minutes. The alloy prepared by this invention exhibits a unique anomalous hardening effect, with a "hardness after annealing higher than in the cold-drawn state," and its Vickers hardness is increased by 1.2%–10.0% compared to the cold-drawn state, while maintaining a conductivity above 97% IACS. This method is extremely simple, energy-efficient, and cost-effective. The resulting alloy has comprehensive properties similar to the traditional Cu-0.08Ag alloy and can replace the latter in precision conductive structural components such as high-end connectors, lead frames, and commutators.

A machining technology for end face teeth of a universal coupling bell housing comprises the following steps that firstly, deep carburizing treatment is conducted on the bell housing, specifically, the bell housing is provided, and deep carburizing treatment is conducted on the whole bell housing, so that a carburizing layer is formed on the surface of the bell housing; the depth of the carburized layer extending from the surface of the bell housing to the inside is 1.2-1.8 cm; and 2, turning and removing a hard layer at the machining end: clamping the bell-shaped shell subjected to deep carburizing treatment on a lathe, turning the end to be machined of the bell-shaped shell, turning and removing a carburized layer in the area, exposing a softened base material layer below, and simultaneously machining a plurality of convex blocks for later machining of a tooth groove. According to the machining technology for the end face teeth of the bell housing of the universal coupling, the deep hardening effect can be achieved, and the high precision of the end face teeth can be guaranteed.

The utility model provides a surface hardening aluminum plate which comprises an aluminum plate body, long protruding parts are symmetrically connected to the upper surface of the aluminum plate body, short protruding parts are symmetrically connected between the adjacent long protruding parts, and point protruding parts are symmetrically connected to the middle of the upper surface of the aluminum plate body. The upper surfaces of the aluminum plate body, the long protruding parts, the short protruding parts and the point protruding parts are fixedly connected with inner hardened layers, the upper surfaces of the inner hardened layers are fixedly connected with surface hardened layers, meanwhile, fixing grooves are symmetrically formed in the lower surface of the aluminum plate body, and the aluminum plate body is fixedly connected with a main side plate, an auxiliary side plate, a main end plate and an auxiliary end plate through the fixing grooves. And the surfaces of the auxiliary side plate and the auxiliary end plate are symmetrically connected with an embedding column and an embedding block respectively. Through cooperation of the long protruding parts, the short protruding parts, the point protruding parts, the inner hardened layer and the surface hardened layer, the hardening effect of the surface of the aluminum plate body can be effectively enhanced, and therefore the hardness and the wear-resisting effect of the surface of the aluminum plate body can be enhanced in an auxiliary mode.

The invention relates to a metal tungsten irradiation hardening effect prediction method based on multi-scale simulation, and the method comprises the steps: S1, initializing system setting and irradiation defect information which comprises the type, size and number density of irradiation defects; s2, simulating an interaction process of dislocation and periodically arranged irradiation defects by using a molecular dynamics method, and obtaining a micromechanism of interaction of the dislocation and the irradiation defects; s3, introducing the micromechanism obtained in the step S2 into a dislocation kinetics system by using a dislocation kinetics method, simulating the action of single dislocation and irradiation defects randomly distributed in the space, and obtaining a single crystal hardening rule; and S4, constructing a polycrystalline plastic finite element model by using the single crystal hardening rule extracted in the step S3 by using a crystal plastic finite element method, inputting irradiation defect information obtained by experimental measurement or other simulation methods, simulating deformation processes such as stretching and compression, obtaining yield strength increment after material irradiation, and realizing irradiation hardening effect prediction.

The application provides a material stress prediction method and a server. The prediction method comprises the following steps: a first correction model is established according to a strain hardening effect model and a thermal softening effect model. A strain rate strengthening term in a JC model is replaced by the first correction model to establish a corrected JC model. The JC model is a product of a strain hardening term, a strain rate strengthening term and a temperature softening term. The stress of the material is predicted according to the corrected JC model. According to the corrected JC model, the complex strain rate effect of the material under high strain rate can be accurately characterized, the prediction accuracy is improved, and a theoretical basis is provided for production and processing. For users, when the condition parameters are changed, the target of the metal sheet component to be prepared can also be obtained according to the corrected JC model, the trial-and-error method of the users to obtain the target of the metal sheet component to be prepared is reduced, the cost is saved, and the time is saved.

The invention relates to a hot-rolled flat steel product, the microstructure of which can comprise at most 9% residual austenite and at most 11% martensite, the remainder being bainitic ferrite with precipitates in the form of carbides, nitrides and / or carbonitrides, and the flat steel product has a tensile strength Rm of at least 950 MPa, a yield strength Re of at least 670 MPa, and a bake-hardening effect BH of at least 40 MPa. The invention also relates to a method for producing the flat steel product.

The present invention discloses a kind of welding material, welding material, application and preparation method, wherein welding material, its raw material composition includes, wt%:Si:1‑3%, Mg:1.2‑3.2%, Zn:1‑3.6%, Cu:0.6‑1.6%, Mn:0.5‑0.8%, Cr:0.2‑0.45%, Ti:0.1‑0.25%, Zr:0.05‑0.1%, Sc:0.05‑0.1%, Fe<0.2%, remainder is Al and inevitable impurities. The present invention reduces the precipitation enthalpy of nanoscale strengthening phase by the regulation of Zn, Cu, Mg, Si elemental content, so as to improve the bake hardening effect of weld, to make up for the weld excessive softening problem existing due to the dissolution of nanoscale precipitated phase. In addition, Fe-containing brittle phase characteristics are improved in weld by Mn, Cr element addition, and weld hot crack tendency is reduced in combination with grain refining elements such as Zr, Sc, Ti, so as to further improve weld toughness.

The application discloses a method for improving the strength of IN625 alloy ring forgings, which comprises the steps of upsetting, punching, horse frame hole expanding, pre-rolling, final rolling and low-temperature bulging. The application refines the grains by adopting high-temperature blanking (including the upsetting and punching and horse frame hole expanding processes) and large deformation forging, and keeps the grains from growing by adopting low-temperature rolling and small deformation forging. The work hardening effect is improved through low-temperature bulging after rolling. The above method can improve the strength of IN625 material forgings, and the IN625 alloy ring forgings with good grain size and mechanical properties are obtained.

The application discloses a preparation method of high-speed bar production nominal diameter 16-20mm HRB400E fine-grain high-toughness straight bar anti-seismic steel bar, a small amount of Cr is added in the steel, and a higher C content is controlled, so that the hardenability and secondary hardening effect are obviously improved, the pearlite content of a microstructure is further improved, the improvement of the tensile strength of the steel and the improvement of the anti-seismic performance are promoted, and the passivation corrosion resistance of the steel is also improved. The steel bar produced by the preparation method has the advantages of excellent and stable process mechanical properties, fine and uniform microstructure, good plasticity and toughness, excellent anti-seismic performance and corrosion resistance, and the like, and the indexes are all better than GB / T 1499.2-2018, and the production cost is reduced by 60 yuan / t compared with the existing vanadium micro-alloying process 钢 The above significantly improves the market competitiveness of the nominal diameter 16-20mm HRB400E straight bar anti-seismic steel bar, and has remarkable economic and social benefits.

The present application belongs to the technical field of petroleum drilling and production equipment materials, and particularly relates to a high-strength and high-toughness martensitic stainless steel for petroleum sucker rod and a heat treatment method thereof. In view of the problems that the existing petroleum sucker rod material is insufficient in strength and toughness, and corrosion resistance and fatigue resistance are difficult to be coordinated under sulfur-containing corrosive medium and alternating load, the present application firstly reduces the cost through specific alloy design without or with low cobalt, and cooperates with the twice heat treatment process of "specific temperature quenching + precise medium-temperature tempering", so as to effectively stimulate the secondary hardening effect of vanadium and niobium micro-alloy elements in the steel at the tempering temperature of 500-600 DEG C, so that the rod part has high toughness while obtaining ultrahigh strength, and has good corrosion resistance and fatigue resistance, and can be used for the key positions of downhole operation.

The utility model relates to the technical field of building construction, and discloses a pouring device for sealing a hinge joint of a bridge, which comprises a glue pouring assembly and a hardening agent pouring assembly, the pouring device further comprises a mixed glue pouring assembly, the mixed glue pouring assembly comprises a cylinder, the top of the cylinder is provided with a first feed port and a second feed port, and the first feed port and the second feed port are communicated with each other. The glue filling assembly is communicated with the first feeding port, the hardening agent filling assembly is communicated with the second feeding port, a discharging port is formed in the bottom of the barrel, a glue injection needle is arranged on the discharging port, and the glue injection needle can be inserted into a bridge hinge joint. A driving motor is further arranged at the top of the barrel, a stirring shaft extending into the barrel is connected to an electric main shaft of the driving motor, and a stirring rod is arranged on the stirring shaft. The epoxy resin AB glue mixing device has the advantages of being good in mixing effect and guaranteeing the hardening effect of epoxy resin AB glue.