17 results about "Hardening effect" patented technology

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 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.

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 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 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.

This invention belongs to the field of marine engineering technology and discloses a method for constructing a numerical model of ice materials and a method for predicting ice loads. The construction method provided by this invention includes: obtaining experimental data by conducting uniaxial compression tests on ice materials under different strain rate conditions; establishing a hybrid hardening model including isotropic hardening and kinematic hardening, and introducing the Cowper-Symonds strain rate model to correct the yield strength, thereby obtaining a constitutive expression for the ice material including parameters to be calibrated; calibrating the parameters to be calibrated based on the experimental data, thereby obtaining a constitutive model of the ice material that simultaneously considers strain rate effects and hardening effects; and establishing a nodal failure mechanism corresponding to the failure criteria of the ice material, thereby obtaining a numerical model of the ice material that simultaneously considers strain rate effects, hardening effects, and failure behavior. This invention also utilizes the numerical model of the ice material for ice load prediction. This invention can improve the accuracy of numerical simulation of ice loads.

This invention belongs to the field of alloy material preparation technology, specifically relating to a method for improving the mechanical properties of eutectic high-entropy alloys. The method comprises the following steps: homogenization annealing → quenching → cold rolling → low-temperature short-time annealing → quenching. This invention constructs a multi-layered heterogeneous lamellar structure in the eutectic high-entropy alloy through cold rolling and low-temperature short-time annealing, enhancing the strengthening and hardening effect of the eutectic high-entropy alloy during deformation, thereby improving its mechanical properties. This method is simple, easy to implement, and low-cost. The preparation process parameters can be flexibly selected according to the performance requirements of the service environment, making it highly suitable for the industrial production and application of high-performance eutectic high-entropy alloys.

The application relates to the technical field of shoes, and provides a leisure shoe with a hardening-resistant vamp, which comprises a vamp, the vamp comprises a surface layer, an elastic layer and an inner layer which are sequentially arranged from outside to inside, the elastic layer comprises an elastic framework and elastic pieces, the elastic framework is provided with a plurality of reset grooves, the elastic pieces are provided in groups, and all the elastic pieces are respectively arranged in the reset grooves. The leisure shoe with the hardening-resistant vamp can delay the hardening effect of the vamp.

The invention discloses a short-process preparation method of a high-strength and high-conductivity Cu-Ag-Sn copper alloy, and belongs to the technical field of high-performance copper alloy materials. The alloy comprises the following components in percentage by mass: 0.03%-0.05% of Ag, 0.005%-0.05% of Sn, less than or equal to 0.01% of impurities and the balance of Cu. The preparation method thoroughly abandons the traditional homogenizing annealing and solution treatment processes, and only comprises three core steps: carrying out upward continuous casting to obtain an alloy casting rod; the casting rod is directly subjected to cold drawing deformation with the total deformation being 75%-85%; and then abnormal hardening annealing is carried out for 30-120 minutes at the temperature of 240-260 DEG C. The alloy prepared through the method has the unique abnormal hardening effect that the hardness after annealing is higher than that in a cold drawing state, the Vickers hardness of the alloy is improved by 1.2%-10.0% compared with that in the cold drawing state, and meanwhile the electric conductivity is kept to be 97% IACS or above. The method is extremely simple in process, low in energy consumption and remarkable in cost benefit, the comprehensive performance of the obtained alloy is similar to that of a traditional Cu-0. 08Ag alloy, and the obtained alloy can replace the traditional Cu-0. 08Ag alloy to be used for precise conductive structural parts such as high-end connectors, lead frames and commutators.

The application provides an Al-Mg-Si alloy deformation and heat treatment method for obtaining optimal aging strengthening effect, and the general formula of the Al-Mg-Si alloy obtained through the method is aAl-bMg-cSi, wherein a=98.6, b=0.6, c=0.55, and a small amount of impurity elements, and the content of the impurity elements is less than or equal to 0.03 wt.%. The application belongs to the technical field of improving the strength of aluminum alloys. The process disclosed by the application is based on the traditional rolling process and heat treatment, is low in cost, and is relatively strong and convenient in operability in the processing process.

The application discloses a QT500-5 nodular cast iron surface laser hardening explainable process parameter optimization method, including the following steps: constructing a finite element heat transfer model, screening a preliminary process parameter range; LHS sampling and testing are carried out in the range, and a data set is constructed; the data set is used to train an MTNN model, a BO algorithm is used for optimization, a BO-MTNN prediction model is constructed, and PCC and SHAP methods are introduced to reveal the action mechanism; a MOHOA algorithm is used for multi-objective optimization, a Pareto solution set is obtained, an EWM and TOPSIS combined decision method is used for multi-index comprehensive evaluation and sorting of the solution set, and an optimal process parameter combination is obtained by optimization; the optimal process parameter combination is verified by actual laser hardening test. The whole scheme has physical accuracy, high efficiency of prediction, multi-objective balance and decision objectivity, greatly reduces the simulation cost, improves the optimization efficiency, and can stably obtain the optimal laser process parameters considering the hardening effect and the melting control.

The invention relates to the technical field of wind power gear machining, and discloses a wind power gear nickel base alloy surface super-hardening carburizing heat treatment process and equipment, the equipment comprises a main base, a heat treatment furnace body and a salt bath pool, the heat treatment furnace body is provided with a carburizing heat treatment assembly and a furnace body temperature control assembly, and the main base and the salt bath pool are provided with a feeding mechanism and a salt bath quenching mechanism respectively. The carburizing heat treatment assembly is heated through a high-temperature-resistant molybdenum alloy heating pipe, acetylene and vaporized acetone are matched to form a carburizing medium, and the carburizing medium is precisely regulated and controlled through a medium concentration monitor and a carbon potential analyzer. The furnace temperature control assembly monitors and adjusts the furnace temperature in real time and exhausts waste gas. The process sequentially comprises the stages of pretreatment, feeding, carburizing preparation, carburizing heat treatment and salt bath quenching, and automatic feeding and transferring are achieved through driving of a servo motor. The carburizing quality is controllable, the gear surface super-hardening effect is excellent, the automation degree is high, safety and protection are achieved, and the wear resistance, fatigue resistance and equipment operation stability of the wind power gear can be improved.