63 results about "Shear band" patented technology

The invention discloses a spiral anchor foundation bearing effect evaluation method and system, and relates to the technical field of finite element analysis, and the method comprises the steps: building a soil body and spiral anchor finite element model, setting boundary conditions, and obtaining finite element data; according to the finite element data, a local damage variable is introduced based on a stress-strain degradation function, local shear band development is simulated, first damage data are generated, and the first damage data comprise a first stress-strain curve and a first local damage variable; layering the soil body, and optimizing the first damage data based on intra-layer constraints to obtain second damage data; calculating full-field stress, displacement and bearing capacity for effect evaluation based on a finite element solver according to the second damage data; the problem of inaccurate evaluation of the screw anchor effect caused by the nonlinear behavior and the layered heterogeneous effect of the soil body is solved.

The invention relates to the technical field of metal plate rolling processing, and discloses a rolling strengthening method capable of reducing the rigidity of a metal plate, which comprises the following steps: applying an asymmetric rolling condition to an initial plate to enable the plate to generate a speed gradient in the thickness direction; the plate is subjected to one-pass large-rolling-reduction rolling, and a non-continuously-distributed shear band is formed; the rolled plate is heated to the dynamic recrystallization temperature interval of the plate, and multi-pass small-rolling-reduction warm rolling is conducted on the plate; and in the warm rolling process, dynamic recrystallization of a shear band is promoted to form a grain-refined continuous core layer, complete recrystallization of the surface structure of the plate is inhibited to keep the work hardening state of the plate, and therefore the metal plate with the rigidity lower than that of an initial plate is obtained. According to the invention, a soft core-hard shell heterostructure is constructed in the plate, high strength and low macroscopic rigidity are synergistically realized, the process controllability is strong, and the method is suitable for preparation of high-performance structural materials.

The invention discloses a large-scale visualized direct shear test device and method for geosynthetics. The device comprises a main frame, an upper shear box, a lower shear box, a normal cyclic loading system, a horizontal cyclic shear loading system, a data acquisition system and a visualized monitoring system. The direct shear test device is characterized in that the direct shear test device can perform normal and horizontal cyclic loading at the same time, and normal stress with different frequencies and amplitudes can be applied according to needs to simulate a test of the characteristics of the reinforcement-soil interface under the cyclic loading effect; one side wall of the upper shear box and one side wall of the lower shear box are transparent observation windows, and a high-speed camera and a digital image analysis method are combined, so that the shear band evolution process can be visually observed and quantitatively analyzed; the shear box is large in size, and the size effect is effectively overcome. According to the invention, the interface characteristics under the cyclic load effect in the road engineering can be reflected more truly and comprehensively, the size and the function of the shear box are comprehensive, and the interface mechanical characteristics and the interaction mechanism under various working conditions can be simulated.

The invention discloses a hierarchical collaborative anchoring prevention and control method for a hidden down-dip rock slope, and relates to the technical field of hierarchical collaborative anchoring prevention and control for the hidden down-dip rock slope, and the method comprises the following steps: obtaining geological survey data of a target slope, and generating a slope digital model composed of a plurality of grid nodes; and performing strength reduction on the slope digital model, simulating a process of evolving the target slope from a steady state to an unsteady state, obtaining data of each grid node in the simulation process, calculating a shear strain value of each grid node, and generating initial slope stress field data. According to the method, the dynamic evolution path of the shear band is accurately tracked through strength reduction simulation and space-time sequence reconstruction, and shear evolution characteristics can be accurately identified, so that dislocation of a reinforcement position and an actual disaster-causing region is effectively avoided, reinforcement failure caused by shear failure of a side slope is effectively avoided, and the prevention and control effect is effectively improved.

The invention discloses a method for identifying a seismic response rule of a side slope containing a ductile shear zone in a vibration table test, and belongs to the technical field of side slope seismic response monitoring. Comprising the following steps: S1, carrying out a vibration table similar material test according to rock mass mechanical parameters and a Buckingham Pi similarity theorem, and constructing a slope physical model containing a ductile shear zone; s2, acceleration sensors are arranged from the slope surface to the interior of the slope in the horizontal direction and the vertical direction; s3, carrying out a vibration table experiment until the model is completely damaged, and recording original data; and S4, processing and analyzing the original data, and carrying out acceleration response analysis. According to the method and the device, the defect that the conventional earthquake damage mode for the tough shear band edge / landslide is not considered from the monitoring physical quantity in the tough shear band edge / landslide slope body and the characteristic parameters of the landslide body is overcome.

The invention discloses a granular material shear band thickness detection method, and relates to the field of geotechnical engineering, and the method comprises the following steps: carrying out a ring shear test on a granular material, carrying out three-dimensional sampling to obtain a sample, dipping and curing the sample to obtain a cured sample, and constructing a three-dimensional granular structure model; the solid-phase fraction of each layer is calculated layer by layer in the height direction of the three-dimensional particle structure model, the relative deviation threshold value of the solid-phase fractions is set, the relative deviation is calculated, the positions where the relative deviation exceeds the relative deviation threshold value of the solid-phase fractions for the first time and the last time are the boundaries of the two sides of the shear band, and the distance between the boundaries of the two sides is calculated to obtain the thickness of the shear band. According to the method, the boundary of the shear band is determined according to the fluctuation condition of the solid-phase fraction, so that the thickness of the shear band is calculated, the thickness of the shear band is directly associated with the micromechanical response in a physical quantization mode, subjective errors caused by judging the boundary of the shear band according to experience are reduced, and the precision of shear band thickness detection is improved.

The invention discloses a tunnel secondary lining concrete damage mechanical test method which comprises the following steps: step 1, preparing a tunnel secondary lining crack concrete test piece, and arranging one or more compressible units in the tunnel secondary lining crack concrete test piece; step 2, arranging a plurality of initial marking points on the side surface of the tunnel secondary lining crack concrete test piece; step 3, obtaining an initial coordinate value of each initial mark point in the corresponding coordinate system; 4, erecting an image device in front of the to-be-monitored side surface; step 5, applying an external force downwards to the upper end of the tunnel secondary lining crack concrete test piece, and in the process of applying the external force, continuously photographing the to-be-monitored side surface by the image device to obtain a plurality of initial mark point change images; step 6, determining displacement change and direction change of the initial mark point between any two moments, and establishing a displacement field; and step 7, determining the position of the shear band. By adopting the method, the real strength parameters of the tunnel secondary lining concrete containing the damaged interlayer can be provided.

A soft magnetic steel wire rod is provided, which comprises, in weight%, 0.0001 to 0.0300% of C, 0.001 to 3.000% of Si, 0.001 to 0.500% of Mn, 0.001 to 0.100% of Al, 0.0001 to 0.0100% of P, 0.0001 to 0.0100% of S, 0.0001 to 0.0100% of N, and the remainder being Fe and other inevitable impurities, wherein, after the soft magnetic steel wire rod is drawn at room temperature at a reduction ratio of 59% to 93%, the number density of shear bands of the steel wire is 11.4 / mm2 or more.

The present invention relates to an airless tire (1) for extraterrestrial vehicles, the airless tire (1) comprising a tread made of three-dimensional fabric for vehicles capable of traveling on various types of surfaces at very low temperatures in extraterrestrial environments. This airless tire includes, radially from the inside to the outside, a support structure (2), a shear band (3), and a tread (4), the support structure (2) being designed to mate with a rim. According to the invention, the material used to manufacture the tread (4) has a tensile Young's modulus E of at least 1 GPa and at most 6 GPa measured at a temperature equal to 20°C and a tensile Young's modulus E of at least 1.2 GPa and at most 9 GPa measured at a temperature equal to -196°C, and a maximum tensile stress Sm of at least 25 MPa and at most 150 MPa measured at a temperature equal to 20°C and a maximum tensile stress Sm of at least 40 MPa and at most 260 MPa measured at a temperature equal to -196°C. These mechanical properties are measured according to standard ASTM D638, and the tread (4) is made solely of three-dimensional fabric (T).

This invention relates to an intelligent flow sensing method and system for cold-pressing amorphous alloy powder, belonging to the field of flow measurement technology. The method includes constructing an acoustic emission feature vector; inputting the original capacitance measurement tensor and acoustic emission feature vector into a capacitance tomography reconstruction algorithm to construct a multi-frequency dielectric-mechanical coupled Gaussian mixture model; performing soft classification decoupling on the dielectric constant distribution matrix to generate a shear band density field and a porosity distribution field; introducing the shear band density field to perform free volume correction on the powder's apparent density distribution field, and solving to obtain a real-time flow characteristic scalar; inputting this time-series graph structure data into a graph neural network-long short-term memory coupled model; comparing the shear band network connectivity with a threshold in real time; and constructing a multi-objective cost function to achieve coordinated control of high-precision flow tracking and active suppression of shear band instability during cold pressing. This invention improves the flow sensing accuracy, instability early warning timeliness, and process control coordination of cold-pressing amorphous alloy powder.

The invention relates to an airless tire (1) for a vehicle capable of traveling in an extraterrestrial environment at very low temperatures and on a variety of different surfaces. Such an airless tire (1) comprises, in the radial direction from inside to outside, a support structure (2) intended to cooperate with a rim or hub (3), a shear band (4) and a tread (6). According to the invention, at least one constituent material of the support structure (2), the shear band (4) and the tread (6) has a Young's modulus E, measured at a temperature of 20 DEG C, of at least 1 GPa and at most 6 GPa, a Young's modulus E, measured at a temperature of-196 DEG C, of at least 1.2 GPa and at most 9 GPa, a maximum tensile stress Sm, measured at a temperature of 20 DEG C, of at least 25 MPa and at most 150 MPa, and a maximum tensile stress Sm measured at a temperature of-196 DEG C is at least equal to 40 MPa and at most equal to 260 MPa, said mechanical properties being measured according to standard ASTM D638.

The invention discloses aluminum-based metal glass and a treatment method thereof. The treatment method comprises the following steps: obtaining a target aluminum-based amorphous alloy bar; determining an elastic loading force according to the breaking strength of the target aluminum-based amorphous alloy bar; according to the elastic loading force, axial elastic loading treatment is conducted on the target aluminum-based amorphous alloy bar, external energy is introduced into the aluminum-based amorphous alloy bar through the axial elastic loading treatment, the energy state of the aluminum-based metal glass is improved, and therefore the young aluminum-based metal glass can be obtained. In the process, more free volume / flow units are introduced into the metallic glass, so that the metallic glass is converted to a state close to a supercooled liquid structure, and a large number of shear bands are generated in the deformation process, so that the mechanical property of the aluminum-based metallic glass is remarkably improved, the brittleness of the aluminum-based metallic glass is improved, and the comprehensive mechanical property of the aluminum-based metallic glass is improved. And the method is easy to operate, a high-performance solution is provided for the lightweight fields of ships, aerospace and the like, and unification of excellent performance and industrial application is achieved.

The invention provides a high-thermal-conductivity polyethylene pipe master batch and a preparation method thereof. The master batch comprises polyethylene powder particles, a copolymer elastomer, surface-modified graphene, multi-walled carbon nanotubes and a processing aid. The raw materials are blended in two steps by adopting a solution-melting method, so that the heat-conducting filler is selectively and uniformly dispersed in a polyethylene matrix, and the percolation threshold value is effectively reduced. The two heat-conducting fillers with different shapes are compounded for use, so that a three-dimensional, efficient and stable heat-conducting network can be constructed, and rapid transportation of heat in the three-dimensional direction is realized. The copolymer elastomer is used as a stress concentration point to initiate crazing and a shear band, so that a large amount of impact energy is absorbed, and the effect of toughening polyethylene is achieved.

The invention provides a layered heterogeneous regenerated aluminum alloy with a self-healing function and a preparation method of the layered heterogeneous regenerated aluminum alloy. The layered heterogeneous secondary aluminum alloy with the self-healing function is composed of a high-strength layer and a high-toughness layer which are alternately laminated, the high-strength layer comprises Al-Ni-Cu-Mg series alloy and has a nanoscale Al3Ni precipitated phase, and the grain size is 1-3 microns; the high-toughness layer comprises an Al-Fe-Si-Zn series amorphous / nanocrystalline composite structure, and the amorphous phase accounts for 40%-50% of the Al-Fe-Si-Zn series amorphous / nanocrystalline composite structure; a Sn / In element concentration gradient transition area is formed at the interlayer interface, and the thickness of the transition area is 300-600 nm. According to the invention, a framework of alternately stacking high-strength layers (Al-Ni-Cu-Mg series) and high-toughness layers (Al-Fe-Si-Zn amorphous / nanocrystalline) is adopted, a nanoscale Al3Ni precipitated phase of the high-strength layers is used for bearing a main load, an amorphous phase of the high-toughness layers disperses stress through a shear band, a Sn / In gradient transition region (with the thickness of 300-600nm) at an interlayer interface relieves stress concentration, a strength-toughness inversion relationship is broken through, and the high-strength and high-toughness composite material is obtained. And high toughness (strength * elongation) is realized, and the performance is greatly improved compared with that of traditional secondary aluminum.

A non-oriented electrical steel sheet according to an embodiment of the present invention contains, by wt%, 1.5 to 5.0% Si, 0.1 to 2.0% Al and 0.1 to 2.0% Mn, with the balance being Fe and inevitable impurities. In a cross section that includes the rolling direction and the thickness direction of the steel sheet, in the central portion going from 1 / 4 to 3 / 4 of the total thickness of the steel sheet, the angle between {113}<110> and the shear band in the rolling direction of the steel sheet is 25 to 55°.

Airless tire (1) for a vehicle, comprising, radially from the inside to the outside, a supporting structure (2), intended to cooperate with a rim (60) of a wheel (10), a shear band (3) integral with the supporting structure (2) and a tread (4) integral with the shear band (3). The tread (4) comprises at least one elastically deformable layer (40) comprising a plurality of successive patterns (41) distributed circumferentially on the perimeter of the tread (4). Figure for abstract: Fig 1

A shear band useful, for example, in a non-pneumatic tire is provided. The shear band uses staggered reinforcing elements positioned within a shear layer of elastomeric material. A variety of configurations may be used to create staggered positioning of the reinforcing elements, including, for example, a horizontal diamond configuration or a vertical diamond configuration. The shear layer is formed from a rubber composition having very low hysteresis reinforced with silica and carbon black and one or more anti-reversion chemicals selected from the group consisting of 1, 3-bis ((3-methyl-2, 5-dioxopyrrol-1-yl) methyl) benzene (CAS number: 119462-56-5) and hexamethylene 1, 6-bis (thiosulfuric acid) disodium salt dihydrate (CAS number: 5719-73-3).

The invention relates to the technical field of slip band soil sample treatment, in particular to an optical fiber-based soil shear band three-dimensional shape intelligent detection device, which comprises an intelligent direct shear box and an automatic insertion mechanical arm, the intelligent direct shear box is composed of an upper box and a lower box, and the upper box is connected with a linear ball guide rail of the lower box through a ball slide block to form a sample forming area; a bottom plate of the lower box is an intelligent bottom plate, and embedded follow-up light source modules are arranged on the intelligent bottom plate in a matrix mode. The automatic inserting mechanical arm is installed on the upper edge of the side wall of the upper box and comprises a linear motor module, an electric cylinder and a multifunctional end effector, and the multifunctional end effector is integrated with a double-station rotating clamping jaw and a laser ranging probe. The light source module is pre-embedded in the bottom plate of the lower box and forms stable physical light path connection with the optical fiber inserted into the upper box before the test, so that the continuity and stability of optical signal transmission in the whole shearing stroke are ensured, and the three-dimensional fine structure of the slip band in the whole shearing failure process of the slip band soil can be dynamically and visually observed.

The invention discloses a landslide shear outlet slip zone in-situ shear rheometer and a test method thereof.The landslide shear outlet slip zone in-situ shear rheometer comprises a transparent shear box, a load applying assembly, a monitoring assembly and a control terminal, and the transparent shear box comprises an upper box body and a lower box body; the load applying assembly comprises a vertical loading unit, a vertical counter-force unit, a plurality of adjustable supporting frames, a horizontal loading unit and a horizontal counter-force unit, the vertical loading unit applies a vertical load to the transparent shear box, and the vertical counter-force unit is arranged on the adjustable supporting frames and applies resistance of the vertical load to the transparent shear box; the height and the inclination angle of the adjustable support frame are adjustable, the horizontal loading unit applies a horizontal load to the upper box body, and the horizontal counter-force unit applies a horizontal counter-force to the lower box body; the monitoring assembly comprises a first displacement sensor, a second displacement sensor, a plurality of bending element probes and a camera; the control terminal is electrically connected with the load applying assembly and the monitoring assembly; and the evolutionary process of the macroscopic stress-strain response and the microstructure in the slip band shearing process can be obtained.

The application relates to a copper target material deformation heat treatment process suitable for continuous production, characterized in that copper plates are continuously put into a -50 DEG C low-temperature holding box in sequence, the copper plates are quickly sent into a rolling mill for deep low-temperature rolling after the temperature of the copper plates is reduced to -50 DEG C, the above-mentioned temperature reduction and rolling multi-pass processes are repeated, and the total deformation of the copper plates reaches 80%; the application is suitable for industrialized continuous and rapid production, high production efficiency is obtained, the obtained target material has good uniformity and good fine-grain effect; through composite deformation, grains are broken, and then a targeted annealing process is formulated to make high-purity copper recrystallize, eliminate shear bands and coarse grains in a single deformation such as rolling, the process cost is moderate, a complex mold is not needed, and the process is a good high-purity copper target material fine-grain and structure optimization process scheme.

A shear band that may be used e.g., in a non-pneumatic tire is provided. The shear band uses interlaced reinforcing elements positioned within a shear layer of elastomeric material. A variety of configurations may be used to create the interlaced positioning of the reinforcing elements including e.g., a horizontal diamond or vertical diamond configuration. The shear layer formed from a rubber composition having a very low hysteresis reinforced with silica and carbon black and one or more anti-reversion chemical selected from 1,3 bis((3-methyl-2,5-dioxopyrrol-1-yl)methyl)benzene (CAS No.: 119462-56-5) and hexamethylene 1,6-bis(thiosulphate), disodium salt, dihydrate (CAS No.: 5719-73-3).

The invention discloses a polymer dispersed liquid crystal membrane capable of improving toughness and resisting finger imprint, a coating composition and a preparation method of the polymer dispersed liquid crystal membrane, and belongs to the technical field of polymer composite materials and PDLC (Polymer Dispersed Liquid Crystal). A polymer matrix of the PDLC film is a three-dimensional cross-linked network, a reactive flexibilizer is combined with the polymer matrix through a covalent bond, the reactive flexibilizer is a first polyurethane acrylate oligomer containing an acrylate functional group at the tail end, the number-average molecular weight is 1500-10000, and the functionality is 2-10. In the curing process, the reactive flexibilizer is anchored to a polymer network through a covalent bond, and due to thermodynamic incompatibility of a flexible chain segment of the reactive flexibilizer and an acrylate monomer, spontaneous phase separation is carried out to form a nano-scale flexible microcell of 50-500 nm, and a microcosmic phase separation structure is constructed. When the PDLC film is subjected to local pressure, the structure can synergistically dissipate energy by inducing crazing, a shear band, large deformation, crack pinning and other mechanisms, so that the toughness and the finger imprint resistance of the film layer are remarkably improved.

The invention relates to the technical field of energy absorption materials and impact protection, and particularly discloses a controllable energy absorption design system and method.The controllable energy absorption design system comprises a function control module and a core structure assembly, and the function control module comprises a numerical simulation module, a material performance testing module and a technological parameter control module; the core structure assembly further comprises a gradient foamed aluminum core body, a multi-stage triggering mechanism and a self-adaptive shell. Through continuous change of the gradient foamed aluminum core body and the porosity in the impact force direction and through precise analysis of a numerical simulation module on mechanical behaviors, sequential collapse of a material is guided, and formation of a local shear band is inhibited; the micro-groove array of the self-adaptive shell enhances lateral constraint, and stress mutation caused by uneven deformation is avoided. Finally, the foamed aluminum is uniformly stressed during energy absorption, the stress fluctuation is reduced, the energy absorption efficiency is improved, the secondary damage risk is reduced, and the stability and protection safety of the energy absorption structure are remarkably optimized.

The present application relates to the field of applying stable shear force to test the strength characteristics of solid materials, in particular to a shear band temperature testing device for soil shearing process and a method for using the same. The shear band temperature testing device for soil shearing process comprises a shear box (1), characterized in that it further comprises a temperature sensor, a pore water pressure gauge (31), a metal filter screen (32) and a data acquisition instrument (4), the shear box (1) comprises an outer box (11), an inner box (12), an upper disc (13), a lower disc (14), an upper disc screw (15), a lower disc screw (16), an interstitial water pressure tank (17) for visualization container, an inner box fixing screw (18) and a counterforce shaft assembly. The method for using the shear band temperature testing device for soil shearing process is characterized in that the following steps are sequentially implemented: i. setting; ii. shearing; iii. collecting. The present application has high precision measurement.

The invention discloses a low-cost high-tungsten-high-entropy alloy armor-piercing bullet core material, the chemical formula is Wx. (HEA) y, x and y respectively correspond to molar percentage values of W and HEA, and x: y = (1.5-9): 1; the preparation method comprises the following steps: 1, carrying out suspension smelting and vacuum gas atomization to obtain high-entropy alloy spherical powder; 2, mixing with tungsten powder to obtain mixed powder; 3, performing cold isostatic pressing to form a compact green body after pre-pressing molding; 4, performing pressureless sintering to obtain a compact sintered body; and 5, solid solution and rotary swaging treatment. The ratio of tungsten to the high-entropy alloy is controlled to control the formation of a hot shear zone, and the armor-piercing shell core material with high penetration capacity is obtained; based on powder mixing, cold isostatic pressing, pressureless sintering and solid solution and rotary swaging treatment processes, densification and strengthening of the material are achieved step by step, the high-tungsten armor-piercing bullet core material with high density and uniform component tissue is obtained, the comprehensive performance is improved, and the high-tungsten armor-piercing bullet core material is suitable for batch production.

The present invention provides a method for characterizing the shear sensitivity of a material, which specifically includes: (1) establishing a kinetic relationship and an energy relationship for the evolution of a shear band in the material; (2) obtaining a kinetic result of the evolution of the shear band in the material based on the kinetic relationship and the energy relationship; (3) solving the dissipated energy of the shear band evolution in the material based on the kinetic result; and (4) obtaining the critical dissipated energy based on the minimum energy principle and proposing an index of shear band toughness in combination with the shear modulus to evaluate the shear sensitivity of the material. The present invention is rationally conceived, fully considers various factors that affect the shear sensitivity of a material, can be widely applied to various materials, and can characterize the shear sensitivity of a material in a low-cost, efficient, and accurate manner.

The application discloses a simulation method for improving plasticity of amorphous alloy under compression, which comprises the following steps: constructing an initial model of amorphous CoMn alloy; cooling to 300K at cooling rates of 10 10 , 10 11 , 10 12 and 10 13 K / s respectively under zero pressure to obtain four amorphous models; periodically replicating and extending the four amorphous models along the X axis by four times to obtain four compression models; setting the compression models as periodic boundary conditions in the X and Y directions and as free boundary in the Z direction; uniaxially compressing the four compression models along the X direction at a strain rate of 1x10 8 s ‑1 to obtain thermodynamic information; and analyzing the influence of nanocluster structure evolution formed by atomic condensation on the mechanical properties of the amorphous alloy. The application solves technical problems that atomic scale microstructure deformation process in a deformation process of MGs is difficult to obtain in experiments, simulates a formation process of a shear band of amorphous material and a microstructure mechanism and the like.

The invention relates to the technical field of dynamic mechanical testing, in particular to a dynamic shear deformation freezing and measuring system and method for a monopulse torsion bar, and the system comprises a torsion bar system, a monopulse loading mechanism and a measuring system. The torsion bar system comprises an incident bar and a transmission bar and is used for conducting torsion stress waves and clamping the thin-wall tubular sample; the single pulse loading mechanism absorbs reflected wave energy through cooperation of a wave unloading rod and a one-way coupler, single pulse loading is achieved, and secondary loading is avoided. The movable buckle is arranged on the incident rod and used for accurately adjusting the loading pulse width, and the movable buckle is matched with the one-way couplers and the wave unloading rods on the incident rod and the transmission rod to achieve single-pulse loading control, so that the loading pulse width can be accurately adjusted in the form of a frozen sample after loading. And the thermal-mechanical coupling data in the loading process is synchronously obtained by using the infrared transient temperature measurement detector and the strain rosette, so that a high-precision experimental means is provided for deeply researching the shear band formation, damage evolution and thermoplastic instability mechanism of the material under the high-strain-rate shear load.

The invention discloses a high-corrosion-resistance aluminum alloy with a micro-shear band penetrating type structure and a preparation method and application of the high-corrosion-resistance aluminum alloy, and belongs to the technical field of aluminum alloy material machining. Through high-strain asymmetric rolling and specific aging compound treatment, a penetrating type micro shear belt structure is successfully constructed in the 7xxx series aluminum alloy, the internal small-angle grain boundary proportion of the 7xxx series aluminum alloy is larger than or equal to 60%, the alloy intergranular corrosion depth is smaller than or equal to 38 micrometers, the tensile strength is larger than or equal to 440 MPa, and the corrosion resistance and the mechanical property can be synchronously improved. According to the scheme, the experimental design is simple and easy to implement, dependence on expensive and rare alloy components is not needed, the production cost can be remarkably lowered, alloy recycling and regeneration can be facilitated, the resource utilization efficiency is improved, native resource consumption is reduced, the core requirement for low-cost and high-environment-friendly materials in the industrial profile field with the distinct cost performance guiding is perfectly met, and the method is suitable for popularization and application. And the method has important industrial application value and is suitable for key force-bearing components such as aerospace and the like.

The present invention relates to the technical field of high-chromium and high-molybdenum ferritic stainless steels, and specifically to a method for preparing a hot / cold rolled sheet of high-chromium, high-molybdenum and aluminum-containing ferritic stainless steel. In order to solve the problems in the prior art that the finish rolling temperature in hot rolling is relatively high and it is easy to form alumina particles and large-sized carbon / nitride particles in the method for avoiding the precipitation of brittle phases, a new method for preparing a hot / cold rolled sheet of high-chromium, high-molybdenum and aluminum-containing ferritic stainless steel is provided, which includes the following steps: melting, casting, forging, hot rolling, annealing, pickling, cold rolling, and recrystallization annealing. Through the forging process in this preparation method, the formation of large-sized TiN and Ti / Nb(C,N) particles can be avoided; through the warm rolling process, nano-scale Laves phases are precipitated, and at the same time, a large-deformation structure is formed, obtaining a large number of deformation microstructures such as shear bands and deformation bands, solving the problem of grain coarsening, and improving the plasticity, toughness and corrosion resistance of the material.