12 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 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.

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 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.

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 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.