99 results about "Surface layer" patented technology

The invention belongs to the technical field of geophysical exploration, and particularly relates to a two-section type phase control high-precision speed field building method for a complex structure area. A two-section type phase control high-precision speed field building method for a complex structure area comprises the following steps that a shallow surface layer area marker bed in a research area is determined, drilled wells evenly distributed in the research area are screened out, and according to the shallow surface layer area marker bed and well logging data of the drilled wells, the shallow surface layer area marker bed and the well logging data of the drilled wells are determined; establishing a three-dimensional structure model and determining a shallow surface layer velocity field of the research area; determining a geological anomalous body and a marker bed of a middle-deep layer area in the research area through seismic geology combination, establishing a middle-deep layer structure model, and determining a middle-deep layer velocity field of the research area; a shallow surface layer velocity field and a middle-deep layer velocity field are fused, a velocity field of a research area is established, time-depth conversion of a time-domain seismic data volume is completed, and a depth-domain seismic data volume is obtained, so that the structural interpretation precision in the research area is improved, and support is provided for well position deployment and storage increase and production.

The invention discloses a portable coastal zone shallow layer columnar sampler, and relates to the technical field of samplers, the portable coastal zone shallow layer columnar sampler comprises a sampling barrel, the bottom end of the sampling barrel is fixedly provided with a vertical cone, the inner side of the sampling barrel is movably connected with a sampling barrel, and one end, protruding out of the sampling barrel, of the sampling barrel is fixedly provided with a guide seat; an assembling cylinder is fixedly installed at the end, away from the sampling cylinder, of the guiding base, a drill bit body is detachably installed on the assembling cylinder through an assembling mechanism, a separating mechanism used for solid-liquid separation is further arranged on the sampling cylinder, and the assembling mechanism comprises a balance weight lantern ring movably connected to the outside of the assembling cylinder; during use, through the replaceable adaptive drill bit, counter weight auxiliary pressing and elastic rubber sleeve anti-contact design, the drill bit is adaptive to different hard impurity soil, drilling resistance is reduced, part loss is reduced, the drill bit is detachable and convenient to carry, the service life of the drill bit is prolonged, the service life of the drill bit is prolonged, and the service life of the drill bit is prolonged. And the suitability, the portability and the durability are improved.

The invention relates to the technical field of material detection, and particularly discloses a method for determining content distribution of impurity elements in gradient depth of a surface layer of a quartz glass product. The method comprises the following steps: (1) putting a sample into a corrosion-resistant container in a clean environment; (2) adding 5-20wt% of hydrofluoric acid solution for etching, and collecting an extraction solution; (3) evaporating a part of the extraction solution to dryness, and adding 1-3wt% of nitric acid to dissolve residues; (4) measuring the concentration of impurity elements; (5) diluting the leaching solution, and then measuring the concentration of the silicon element; (6) performing a blank experiment; (7) calculating the etching quality and depth according to a formula; and (8) calculating the content of impurity elements in combination with the etching quality. According to the method, layer-by-layer analysis of the surface layer of the quartz glass at different depths in a range from submicron to tens of microns is realized, and the enrichment layer or diffusion gradient of impurity elements can be clearly and intuitively revealed.

The application discloses a micro-nano circular plate fracture analysis method considering coupling of surface effect and plastic zone, and firstly establishes a three-dimensional curved surface coordinate system suitable for a surface layer, and then further corrects a Dugdale cohesion force model according to a superposition principle after considering surface correlation of the plate, and then simplifies the Dugdale cohesion force model into a hyper-singular integral equation by using Hankel transformation, and finally obtains influences of the surface effect on the plastic zone size and crack surface displacement by numerically solving the hyper-singular integral differential equation.The method can accurately capture the nonlinear coupling relationship between the crack size, the surface shear modulus, the torsional displacement and the stress intensity factor under the micro-nano scale, effectively corrects calculation deviation generated by traditional classical theory when the surface effect is ignored, ensures the accuracy of the fracture analysis under different scales, and realizes more accurate and more comprehensive theoretical description of the elastic-plastic fracture behavior of the micro-scale material.

The invention relates to a high-temperature-resistant Si3N4-based wave-absorbing material based on FSS and a preparation method thereof. The high-temperature-resistant Si3N4-based wave-absorbing material based on the FSS comprises a frequency selective surface layer, a porous silicon nitride dielectric layer and a metal substrate which are sequentially stacked from top to bottom, the frequency selective surface layer is composed of M * N FSS units which are periodically arranged in a two-dimensional plane and are in a Jerusalem cross pattern, M is larger than or equal to 8, and N is larger than or equal to 8. The high-temperature-resistant Si3N4-based wave-absorbing material based on the FSS provided by the invention can realize effective absorption of C-Ku wave band electromagnetic waves, has the characteristics of thin thickness, low reflectivity, high strength, high temperature resistance, light weight and wide frequency band, and can realize the purpose that the high-temperature-resistant Si3N4-based wave-absorbing material can be used for absorbing high-temperature-resistant Si3N4-based wave-absorbing material in a complex and severe physical environment with relatively small physical burden. And efficient, reliable and lasting absorption of broadband electromagnetic waves is realized.

The invention provides a hierarchical mixture design index and optimization method according to functional requirements of different pavement layers (a surface layer, a middle surface layer and a lower surface layer) in combination with climate zoning and traffic load characteristics. According to the method, key mechanical parameters (the dynamic stability of a surface layer is greater than or equal to 6000 times / mm, and the low-temperature bending strain of a lower surface layer is greater than or equal to 2500 mu epsilon) are determined according to the horizon function, and then the mineral aggregate gradation and the special asphalt dosage are optimized through coupling analysis of volume parameters (the void ratio is 3%-5%, and the mineral aggregate void ratio is greater than or equal to 17%) and mechanical properties. And meanwhile, a bonding layer interface shear strength test (greater than or equal to 1.2 MPa) is introduced, so that the structural integrity is ensured.

This application provides a method and apparatus for identifying anomalies in micrologging interpretation data. The method includes: acquiring the first arrival wave from historical seismic observation data; acquiring the coordinate data of the micrologging well to be identified; performing tomographic inversion on the surface layer based on the coordinate data and the first arrival wave to obtain surface velocities and thicknesses for different surface layers; generating a first velocity-thickness curve based on the surface velocity and thickness; performing tomographic inversion on the micrologging well to obtain a second surface velocity and a second surface thickness; generating a second velocity-thickness curve based on the second surface velocity and the second surface thickness; and determining whether the second velocity-thickness curve is anomaly based on the first velocity-thickness curve. This application can effectively improve the accuracy of micrologging data, thereby improving the quality of single-shot seismic exploration acquisition and the accuracy of static correction calculations in data processing.

The application discloses a soft and dry double-layer composite material, which comprises a bottom layer and a surface layer arranged on the upper portion of the bottom layer, wherein the surface layer has an upper surface and a lower surface, the surface layer is provided with an opening penetrating through the surface layer, the bottom layer is provided with a first protruding portion protruding upward, the first protruding portion penetrates through the opening, the top surface of the first protruding portion is higher than the plane where the upper surface of the surface layer is located, and the fiber fineness of the bottom layer is smaller than that of the surface layer. The application can provide a good soft and comfortable experience for users and improve the dryness of the material.

The present application relates to the technical fields of belt tearing online monitoring, more particularly to a fuel running belt tearing online monitoring and early warning system, comprising: a belt, wherein the interlayer is set to be different from the surface layer in color; a collection module capable of collecting data of the belt; a control module for analyzing and judging according to the data information of the collection module, monitoring and early warning of the belt tearing; the belt multilayer property is utilized, the interlayer is set to be different from the surface layer in color, which is conducive to improving the accuracy of the tearing trace judgment; the real-time monitoring of the belt tearing is realized through the real-time collection of the belt data; through the setting of the inductor unit and the sensor, the internal monitoring of the belt can be realized, and the monitoring of the accident occurrence position can be realized at the same time, improving the monitoring efficiency.

The invention relates to the field of aquatic ecosystem restoration, and discloses an aquatic ecosystem rapid restoration construction method which comprises the following steps: stripping a bottom mud surface layer by utilizing a controlled hydraulic vortex field to form suspended particle cloud; double closed-loop intelligent control is started during construction, the physical state of operation is adaptively adjusted based on real-time feedback of process acoustic signals, meanwhile, the biological potential and the environmental risk of the suspended particle cloud are diagnosed online, and according to the decision, a corresponding repairing preparation is injected; according to the invention, by constructing an intelligent operation system with unified physical execution and biochemical decision, the restoration mode conversion from traditional exogenous coverage to endogenous potential awakening is realized, and real-time diagnosis and adaptive regulation and control can be carried out on each operation point location in a complex and uncertain underwater environment, so that blind construction is avoided, and the construction efficiency is improved. And the effectiveness of ecological restoration is improved.

The invention provides a copper liquid continuous oxygen determination probe. A gradient composite protection tube essentially considers the erosion resistance of a surface layer and the thermal shock resistance of the whole from the material; due to the unique design of the turbulent flow cover and the thermal buffer cavity, destructive power of mechanical scouring and thermal shock is effectively eliminated from the physical structure; according to the modularized solid-state reference and the modularized sensing unit, the leakage and failure risks of a traditional air reference are fundamentally avoided, and the stability of a core measuring element is improved; the integrated intelligent diagnosis system not only can output high-reliability measurement data, but also can monitor the health state of the probe in real time and predict the residual life, so that the conversion from passive failure replacement to active early warning maintenance is realized. According to the scheme, the structural design is reasonable, the process complexity and the manufacturing cost are not excessively increased while the service life of the probe is remarkably prolonged, the measurement stability is remarkably improved, and good industrial application prospects and economic benefits are achieved.

The invention discloses self-repairing aerogel as well as a preparation method and application thereof, and belongs to the technical field of new materials. The aerogel comprises a substrate aerogel layer, a self-repairing functional layer and a reinforced skeleton, wherein the substrate is SiO2 aerogel and is prepared by adopting a combustion synthesis method; the self-repairing functional layer is composed of a polyimide microcapsule-ultraviolet curing type siloxane repairing agent system embedded in the substrate and a nanofiber reinforced polyurea and temperature-sensitive repairing component composite coating coated on the surface; and the reinforced framework is a Ni-Ti memory alloy mesh support. Through a synergistic mechanism of'surface layer temperature-sensitive flow repair-deep microcapsule repair agent release-skeleton crack propagation inhibition ', crack repair is realized, stability is maintained under extreme temperature difference, and the radiation shielding efficiency is high. The problems that a traditional material is insufficient in repairing capacity under the extreme environment of the moon and depends on external maintenance are solved, the durability and safety of moon buildings are remarkably improved, and the important aerospace application value is achieved.

The application discloses an on-line monitoring device and method for surface layer oxides of internal materials of a high-temperature and high-pressure reaction kettle. The device comprises a monitoring window assembly and a Raman spectrum monitor. A window opening is arranged on a reaction kettle body of the high-temperature and high-pressure reaction kettle, and the monitoring window assembly is of a detachable structure. The monitoring window assembly comprises a window penetrating assembly, a window fixing flange and bolts. The window penetrating assembly is fixed on the window opening through the window fixing flange and the bolts. The Raman spectrum monitor is arranged outside the reaction kettle body. The on-line monitoring device for surface layer oxides of internal materials of the high-temperature and high-pressure reaction kettle simplifies the overall structure, reduces equipment cost and maintenance difficulty, and is suitable for long-term high-temperature and high-pressure test requirements. The overall design of the device focuses on on-line monitoring of the surface layer oxides of the materials, and internal dynamics can be observed in time. Meanwhile, the monitoring window assembly is of a detachable structure, replacement and maintenance of the window penetrating and sealing components are facilitated, and the practicality and service life of the device are further improved.

The embodiment of the utility model provides an absorption article which comprises a body, the body comprises a surface layer, a diffusion layer, an absorption layer and a bottom layer, the absorption layer comprises second linear embossments, the second linear embossments are formed by adjacently arranging a plurality of second indentations, the plurality of second linear embossments are arranged along the width direction of the body, the surface layer is provided with a plurality of through holes, and the bottom layer is provided with a plurality of through holes. The body further comprises a first linear embossing, the first linear embossing is formed by adjacently arranging a plurality of first indentations which are recessed from the surface of the surface layer to the bottom layer, and body fluid can quickly penetrate through the surface layer to be diffused by the diffusion layer and absorbed by the absorption layer through the arrangement; body fluid can be quickly guided and diffused through the second linear embossed patterns, so that the absorption capacity of the whole absorption layer is utilized, the containing space is formed under the through hole, the infiltrated body fluid can be temporarily contained in the containing space, and back infiltration is reduced under the blocking effect of the diffusion layer.

The invention relates to the field of trenchless repair, in particular to a permanent inner film for a UV-CIPP drainage material, which comprises a PET needle-punched cloth layer serving as an inner layer, a surface layer serving as an outermost layer, a PA layer bonded with the surface layer, and a bonding layer for bonding the PET needle-punched cloth layer and the PA layer, the PA layer and the surface layer are heated and extruded through three screws of film spraying equipment and then compounded through a die head, the temperature resistance and styrene erosion and elongation resistance of the inner film in the construction process are improved, the stability of the material and the influence of adverse factors in the material construction process are greatly improved, meanwhile, the permanent inner film serves as the inner wall of the pipeline, and the service life of the pipeline is prolonged. The flow velocity of the pipeline can be greatly increased, and the problem that the drainage UV-CIPP material is not resistant to internal pressure can be solved.

The present application relates to the technical field of oil and gas exploration, and particularly relates to a resistivity model to velocity model method and system based on deep learning. The method comprises generating random samples containing resistivity, formation depth and formation wave velocity through a variant of the Faust formula, training a neural network using the random samples, adjusting network parameters, constructing a BP network model capable of mapping each other between resistivity, formation depth and formation wave velocity, obtaining a measured data set to train the BP network model to obtain a resistivity to velocity model, obtaining resistivity values and corresponding formation depths at any regional position in the work area, and inputting the resistivity to velocity model to obtain a predicted acoustic wave velocity model. The present application can accurately output an acoustic wave velocity model of the full region of the underground surface layer, has higher flexibility, accuracy and adaptability compared to traditional methods, and can cope with deeper surface layer complex structures, thereby providing support for seismic data static correction and velocity modeling.

The application discloses a front land basin surface outcrop three-dimensional geological modeling method, system and device, which comprises the following steps: superimposing research area surface elevation data and a geological map, stereoscopically displaying the geological map and matching the actual surface outcrop stratum; establishing a research area surface outcrop stratum information comprehensive table by combining the geological map through field outcrop geological investigation; superimposing a two-dimensional seismic profile and a three-dimensional geological map, cutting to obtain a modeling range, performing surface layer interpretation according to the research area surface outcrop stratum information comprehensive table, and establishing a shallow geological structure model; calibrating a layer according to research area drilling data, establishing an underground deep geological structure model; and performing three-dimensional space structure modeling according to a geological map and field investigation understanding through computer three-dimensional reconstruction technology in a region without seismic data, and establishing a surface outcrop three-dimensional structure geological model. The application has low operation cost, controllable modeling time, high rationality and reliability of the model, and saves exploration cost.

The present application relates to the technical field of seabed sediment collection, and discloses a seabed surface layer sediment layered collection device, wherein the collection cylinder is composed of multiple segments in a splicing mode, and the inside of the collection cylinder is provided with multiple layered intercepting boxes. The collection cylinder is composed of multiple segments in a splicing mode, so that the collection depth of the collection cylinder can be adjusted according to actual needs. The splicing ring seat, limiting groove and limiting bolt are used to facilitate the quick combination and connection between multiple collection cylinders, so that the connection is stable, and the subsequent quick taking of samples is facilitated. By adjusting the length of the single-segment collection cylinder, the requirements of different sampling layer spacings in layered sampling can be met, so that the flexible application conditions are met. By arranging multiple layered intercepting boxes in the collection cylinder, the internal space of the collection cylinder is divided into multiple groups of collection cavities, so that the samples with different layer spacings can be stored separately in layers during layered sampling.

The invention provides a steady-state measuring device and method for measuring radiation heat flux of an extraterrestrial space, and the device comprises a mounting bottom plate which is made of a thermal insulation material; the first heat flow meter is assembled in the first area of the mounting bottom plate; comprising a first measuring assembly and a second measuring assembly, the second measuring assembly is stacked on the surface of the first measuring assembly, and the diameter of the second measuring assembly is smaller than that of the first measuring assembly; the surface layer of the first measuring assembly is provided with a first compensating plate. The surface layer of the second measuring assembly is provided with a first temperature-sensing wafer. The second heat flow meter is assembled in the second area of the mounting bottom plate; comprising a third measuring assembly and a fourth measuring assembly, the fourth measuring assembly is stacked on the surface of the third measuring assembly, and the diameter of the fourth measuring assembly is smaller than that of the third measuring assembly; the surface layer of the third measuring assembly is provided with a second compensating plate. The surface layer of the fourth measuring assembly is provided with a second temperature-sensitive wafer. The lunar orbit solar radiation, the lunar reflection and the lunar infrared radiation heat flow can be measured at the same time.

The invention relates to a method for quickly acquiring dynamic mechanical properties of a surface layer of an electromagnetic launching track. Belongs to the technical field of electromagnetic track launching. The armature material spraying layer is prepared on the electromagnetic track material through electric arc spraying, interface diffusion of the track and the armature material is promoted through electric pulse treatment, the internal structure and performance of the spraying layer are regulated and controlled through heat treatment, and finally a reconstructed sample piece with the size meeting dynamic mechanical property test research is obtained. And during electric treatment, current flows through the electromagnetic track material from the armature material spraying layer. According to the method, a large number of reliable samples can be obtained in an extremely short time, and necessary conditions are provided for optimization of electromagnetic emission armatures and track materials and scientific and effective evaluation of electromagnetic emission life.

An information processing device (20) is provided with a control unit that acquires observation data obtained at each observation time by observing the surface layer of a stacked raw material (12) conveyed in sequence by means of a sensor (30), and that calculates an index relating to the particle diameter of each particle included in the stacked raw material (12) at each observation time using the acquired observation data. And a control unit that acquires measurement data obtained at each measurement time corresponding to each observation time by measuring the state of the deposited raw material (12), corrects the calculated index for the observation time corresponding to each measurement time using the acquired measurement data, and outputs the corrected index for each observation time.

The present application relates to a kind of seabed surface medium collection devices, including frame body, mechanical arm device, storage box and environmental detection device being installed on frame body;Frame body is also provided with the storage assembly of forming multiple storage cavities, different grab bucket is placed in each storage cavity;The top of grab bucket is provided with female joint;Mechanical arm device includes mechanical arm and the male joint installed at the end of mechanical arm, and male joint can be connected with any female joint;Storage box is provided with multiple independent placement cavities between each other.Collection device is underwater, according to the type of medium collected, different grab bucket can be selected by mechanical arm, so that different types of medium samples can be effectively collected.Different medium samples collected are respectively placed in different placement cavities, and medium samples will not contact each other, to avoid cross contamination.

The invention relates to a method and a system for testing rolling load performance of a moving surface layer. The method comprises the following steps: fixing a moving surface layer sample to be tested on a test base and determining a rolling test area; a rolling load spectrum comprising a plurality of test periods is constructed, at least one different rolling load parameter is set in different test periods, and the parameters comprise one or more of normal load, contact pressure, rolling speed, reciprocating stroke, rolling path width and cycle index; driving a roller assembly to apply a reciprocating rolling load to the test area according to the load spectrum, and collecting multiple types of test data; performing time synchronization, de-noising and feature extraction on the data to obtain a damage feature set of residual indentation, rigidity attenuation, wear rate, dusting, peeling and the like; generating a rolling load performance score and / or grade determination; and when the two adjacent test periods meet the termination conditions such as the damage threshold, the score threshold or the maximum period number and the like, terminating and outputting a result.

A steel sheet made of a steel having a composition comprising C: 0.3% to 0.4%, Mn: 0.5% to 1.0%, Si: 0.4% to 0.8%, Cr: 0.1% to 1.0%, Mo: 0.1% to 0.5%, Nb: 0.01% to 0.1%, Al: 0.01% to 0.1%, Ti: 0.008% to 0.03%, B: 0.0005% to 0.003%, P < 0.020%, Ca < 0.001%, S < 0.004%, N < 0.005% and optionally comprising Ni < 0.5%, the steel sheet having a microstructure comprising 60% to 95% ferrite in surface fraction, the rest being martensite-austenite islands, pearlite or bainite, and including a bulk and a surface layer occupying the outermost 10% thickness on both sides of the bulk, the surface layer having a population of surface inclusions of oxides, MnS and TiNbCN in which the cumulative surface fraction is equal to or lower than 75*10 ‑6 -2.

The invention discloses an underwater foundation scour pit rapid repair and evaluation method based on a geotechnical blanket, which comprises the following steps: step 1, range calculation: constructing a scour pit three-dimensional model through sonar scanning, and calculating a blanket laying range; secondly, a surrounding blanket is put, specifically, a geotechnical surrounding blanket module is accurately put, and the surface of the scour pit is covered; 3, anchoring connection is conducted, specifically, the geotechnical surrounding blanket modules and the foundation structure are connected through anchoring points preset on the edges of the geotechnical surrounding blanket modules for cooperative stress; 4, silting protection is conducted, natural silting of silt is promoted through ecological materials on the surface layer of the geotechnical blanket module, and a stable protection layer is formed; 5, effect evaluation is conducted, specifically, the repairing effect is comprehensively evaluated based on the scouring pit depth change rate, the blanket displacement amount and the local flow velocity attenuation coefficient; the composite structure of the geotechnical blanket modules is combined with modular assembly, the anti-scouring performance is effectively improved, sediment deposition is promoted through the ecological surface layer to form a natural protection layer, and environment friendliness and long-term stability are both considered.

A steel sheet made of a steel having a composition comprising C: 0.3% to 0.4%, Mn: 0.5% to 1.0%, Si: 0.4% to 0.8%, Cr: 0.1% to 1.0%, Mo: 0.1% to 0.5%, Nb: 0.01% to 0.1%, Al: 0.01% to 0.1%, Ti: 0.008% to 0.03%, B: 0.0005% to 0.003%, P < = 0.020%, Ca < = 0.001%, S < = 0.004%, N < = 0.005% and optionally comprising Nilt; the present invention relates to a steel sheet having a microstructure comprising, in terms of surface fraction, 60% to 95% ferrite with the remainder being martensite-austenite islands, pearlites or bainite, and comprising a main body and a surface layer occupying the outermost 10% thickness on both sides of the main body, the surface layer having a surface layer inclusion group in which the cumulative surface fraction of oxides, MnS and TiNbCN is equal to or lower than 75 * 10 <-6 >, the steel sheet having a microstructure comprising, in terms of surface fraction, 60% to 95% ferrite with the remainder being martensite-austenite islands, pearlites or bainite.

Provided is a frame member formed by hot-stamping a steel sheet. The frame member has a closed cross section portion in which a cross section perpendicular to a longitudinal direction is a closed cross section, and the closed cross section portion has at least two flat parts having a radius of curvature larger than a maximum external dimension of the cross section, and a recessed bead part formed between the two flat parts. The recessed bead part has a pair of wall portions which have a radius of curvature of 50 mm or greater, and protrude toward an inside of the closed cross section portion from end portions of the two flat parts facing each other via a pair of bent portions bent toward an inside of the closed cross section. A Vickers hardness of a thickness middle portion in the wall portion is 520 Hv or greater, a width of the wall portion is 0.5 times or greater and 2.5 times or less an effective width We, and a standard deviation ratio obtained by dividing a standard deviation of hardness frequency distribution in a surface layer portion in the wall portion by a standard deviation of hardness frequency distribution in the thickness middle portion in the wall portion is less than 1.0.

The application discloses an experimental system and method for simulating the falling and breaking and motion characteristics of a dangerous rock of a slope, relates to the technical field of rock dynamics and engineering geological disaster prevention, and comprises a supporting and protecting device, an impact launching device, an adjustable composite slope device and a dynamic acquisition and analysis device. The impact launching device realizes accurate adjustment of an impact speed through a pneumatic driving unit. The adjustable composite slope device adopts an inclination hydraulic adjusting unit and a quick-release surface clamp to realize quick adjustment of the slope and the surface layer of different lithology slopes. The dynamic acquisition and analysis device synchronously acquires high-speed images of the whole process of rock impact breaking, the initial speed away from the cabin, the internal crack evolution of the slope and the three-dimensional morphology data of the debris. The application can quantitatively determine the critical kinetic energy threshold of rock breaking, reverses the motion trajectory and energy dissipation law after breaking, and provides a reliable experimental platform and method for the mechanism research of dangerous rock falling of a high and steep slope and the design of a protection engineering.

The invention discloses a high-temperature-resistant impact-resistant composite material with a gradient crystallization structure and a single-time forming method thereof, and relates to the technical field of composite material preparation, the composite material is of a gradient crystallization structure formed by a surface layer and a core part, the crystallinity is continuously and progressively decreased from the surface layer to the core part, the crystallinity of the surface layer is larger than 45%, and the crystallinity of the core part is smaller than 15%. According to the high-temperature-resistant and impact-resistant composite material with the gradient crystallization structure and the single-time forming method of the high-temperature-resistant and impact-resistant composite material, integrated part manufacturing is completed through the single process of core-shell extrusion wire manufacturing and 3D printing forming, multi-part assembling is not needed, and the production period is greatly shortened; a complex special-shaped structure can be directly manufactured, subsequent processing is not needed, the problem that an existing gradient material cannot be manufactured into a complex structure is solved, the composite material takes a macromolecule as a base material, the density of the composite material is only 1 / 3-1 / 5 of that of metal such as steel, and light weight of military equipment can be achieved; and meanwhile, equipment investment and labor cost are reduced through single-process manufacturing.

Provided are extra-thick steel flange materials with excellent fatigue properties and low-temperature impact toughness, and methods for producing the same. [Solution] The microstructure has a surface layer region from the surface to the 1 / 8 point in the thickness direction, which contains 80% or more polygonal ferrite and the remainder bainite, in terms of area %, and a central region from the 1 / 8 point to the 1 / 2 point in the thickness direction, which is the remaining region, which is the central region, which contains 80% or more of one or more of bainite and martensite, and the bainite or martensite in the central region has a high-angle grain boundary of 15° or more, the average packet size is 25 μm or less, and the difference in porosity between the region from the surface to the 3 / 8 point in the thickness direction and the region from the 3 / 8 point to the 5 / 8 point in the thickness direction is 0.100 mm 3 / g or less, and the Charpy impact absorption energy value at -50°C is 50J or more.