588 results about "Brittleness" patented technology

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

The invention discloses a deep tunnel surrounding rock mechanical parameter inversion method based on a three-dimensional brittle failure zone contour and sparrow optimization algorithm-information vector machine (SSA-IVM) combined optimization algorithm. The engineering technical problem that due to the fact that excavation instantaneous displacement is difficult to monitor, deep tunnel surrounding rock mechanical parameters are difficult to reasonably obtain through displacement back analysis is solved. The method comprises the following steps: firstly, constructing a tunnel FLAC3D numerical simulation model with the same ground stress condition at the occurrence position of a three-dimensional brittle failure zone; secondly, taking an absolute error between the total number of computational grid units in the actually measured brittle failure zone and the total number of computational grid units entering a plastic state in the range of the actually measured brittle failure zone after calculation of the FLAC3D numerical model as an optimization objective function; and then, by taking the tunnel surrounding rock mechanical parameters as optimization variables and taking a target function reaching a global minimum value as a target, performing global optimization by combining a tunnel FLAC3D numerical model and adopting an SSA-IVM joint optimization algorithm, thereby obtaining reasonable tunnel surrounding rock mechanical parameters.

The invention discloses an annular furnace heat-resistant supporting forged chassis and an additive manufacturing process and a fixing device thereof, and belongs to the technical field of plating of metal materials, and the annular furnace heat-resistant supporting forged chassis comprises the steps that heat-resistant alloy steel base metal with specific components is prepared; carrying out laser texturing and nickel-based alloy bottom layer pretreatment on the surface of the steel plate; performing laser cladding on high-silicon high-temperature alloy powder containing niobium and rare earth elements to form a functional cladding layer, and performing gradient cladding on the edge of the atmosphere guide hole; and finally, carrying out heat treatment and assembling with a fan-shaped refractory brick fixing device. A composite oxide film and a multi-scale strengthening system are constructed, hydrogen resistance and brittleness resistance are effectively achieved, interface thermal stress is relieved, cracking and stripping of a cladding layer are avoided, a fixing device adapts to thermal expansion, the atmosphere is dredged, and the annealing uniformity of a steel coil is improved; the problems of creep deformation, hydrogen embrittlement, cladding layer stripping and thermal stress cracking of a traditional supporting component under the conditions of high temperature, heavy load and nitrogen and hydrogen atmosphere are solved.

The invention relates to the technical field of stainless steel production and manufacturing, and discloses a high-strength corrosion-resistant duplex stainless steel shaft forging method which comprises the steps of blank preparation, homogenization treatment, preheating treatment, multidirectional forging, interrupted cooling, solution treatment, aging treatment and surface finish machining. Uniformity of components in the blank and consistency of temperature distribution are guaranteed, a uniform microstructure basis is provided for subsequent forging, meanwhile, grains are refined through large deformation and multi-pass deformation in multi-directional forging, the strength and toughness of the shaft are improved, brittle phase formation is avoided, and the mechanical property is optimized; by interrupting cooling and solution treatment, controlling the cooling rate and heating parameters in real time, inhibiting harmful phase precipitation and optimizing the austenite-ferrite phase proportion, the shaft has high corrosion resistance, and by means of aging treatment, through a stable structure, the long-term durability of the shaft in a severe environment is guaranteed, and the corrosion weight loss and pitting corrosion risk are reduced.

The invention discloses a material with a silver coating for low-temperature brazing of brazing filler metal, and particularly relates to the field of brazing welding, which comprises the following steps: silver amalgam paste is prepared by oscillating and mixing silver powder and mercury according to the mass ratio of 1: 9-0.5: 9.5 in a manner and method for plating silver on the surface of base metal (metal, semiconductor, ceramic or glass); when brazing is carried out, the surface of the silver plating layer of the to-be-welded piece is coated with brazing filler metal, and then heating and pressurizing are carried out in a low-temperature interval of 120-350 DEG C in a vacuum, protective atmosphere or atmospheric environment to complete connection. According to the method, the amalgam reaction and isothermal solidification principles are utilized, a tough welding spot mainly comprising a silver-based solid solution is finally formed, generation of a large number of brittle intermetallic compounds is avoided, a connector has high strength, high reliability and excellent thermal fatigue resistance, and therefore the problems that gold-tin brazing filler metal is high in cost, the brittleness of the welding spot is large, and the welding temperature is high are successfully solved.

An aluminum nitride ceramic welding assembly comprises a first aluminum nitride ceramic piece, a second aluminum nitride ceramic piece and a third aluminum nitride ceramic piece, a second pin hole corresponding to the first pin hole is formed in the welding surface of the second aluminum nitride ceramic piece; two ends of the aluminum nitride ceramic positioning pin are respectively inserted into the first pin hole and the second pin hole; and the slurry layer containing rare earth oxide is arranged on the welding surface of the first aluminum nitride ceramic piece, and the distribution density of the rare earth oxide is gradually reduced from the position close to the first aluminum nitride ceramic piece to the position far away from the first aluminum nitride ceramic piece. High-temperature displacement errors are eliminated by means of cooperative positioning of pin holes in the first aluminum nitride ceramic piece and the second aluminum nitride ceramic piece and aluminum nitride ceramic positioning pins; and meanwhile, generation of brittle phases is inhibited by utilizing a form that the distribution density of rare earth oxides in the slurry layer is gradually reduced from near to far, so that the effects of a high-precision welding interface and joint strength enhancement are obtained, and the reliability and the service life of the aluminum nitride ceramic component are improved.

The invention discloses a high-strength and high-plasticity low-melting-point aluminum alloy brazing material and a preparation method and application thereof, and relates to the technical field of solder manufacturing. The low-melting-point aluminum alloy welding flux is prepared from the following components in percentage by weight: 10 to 14 percent of Si, 4 to 20 percent of Cu, 0.04 to 0.25 percent of Eu, 0.78 to 0.82 percent of Fe, 0.13 to 0.17 percent of Mn, 0.08 to 0.12 percent of Mg, 0.18 to 0.22 percent of Zn and the balance of aluminum and inevitable impurities. The Al-Si-Cu ternary alloy is constructed to form a low-melting-point eutectic phase, the melting point of the material is effectively reduced, meanwhile, Eu atoms are doped, the aluminum matrix is subjected to the pressure stress effect, the interplanar spacing is reduced, the grain size of the matrix aluminum phase is reduced, the elemental Si phase is refined, the eutectic Al-Si phase content is increased, and precipitation of the brittle Al2Cu phase is restrained; therefore, the aluminum alloy solder has high tensile strength and elongation after fracture under the condition that the melting point is low.

The invention relates to the technical field of alloy materials, in particular to a tungsten-zirconium active material and a preparation method thereof. The tungsten-zirconium active material provided by the invention is prepared from the following elements in percentage by mass through a specific preparation method: 55-85% of W, 10-35% of Zr and 3-30% of other elements, and the other elements are more than two of Ti, Nb, Hf and Mo. The content of W is controlled to be 55-85%, so that the density of the material is 11 g / cm < 3 > or above, the high strength of the material is ensured, and the material has kinetic energy penetration capacity; the content of Zr is 10% or above, and it is guaranteed that the material has certain activity; and the addition of other elements such as Ti, Nb, Hf and Mo inhibits the generation of a W2Zr brittle phase, so that the plasticity of the tungsten-zirconium active material is improved. And by combining with a specific preparation method, the prepared tungsten-zirconium active material has high plasticity while having high strength and high density.

The invention discloses a design method capable of giving consideration to both toughening and crack path controllability for a brittle material, and belongs to the technical field of fracture mechanics and artificial intelligence crossing, and the method comprises the steps: employing an input coding method based on space-response double-domain fusion to carry out feature extraction; introducing a channel attention mechanism to perform weighted fusion on the extracted double-domain features, and generating prediction results for different key tasks; evaluating the reliability of a prediction result by adopting a phase field verification and closed-loop adaptive optimization mode, and carrying out iterative training and optimization on the neural network; and taking the optimized neural network as a fitness evaluation function of double-target genetic optimization, and performing multi-target optimization on defect generation parameters. According to the invention, through fusion of the spatial domain and the response domain, geometric morphology and dynamic response characteristics are cooperatively extracted, and the prediction precision of complex fracture behaviors is improved; through non-dominated sorting multi-objective optimization under physical constraints, a high-toughness and path-controllable optimal solution is output, and brittle materials are pushed to cross an active controllable fracture design.

The invention provides a high-thermal-conductivity flexible epoxy composite material as well as a preparation method and application thereof, and belongs to the field of high polymer materials. The composite material disclosed by the invention is prepared by adding polydopamine modified BN and FG which are jointly used as fillers into an epoxy matrix and adopting polyether amine as a curing agent. The polydopamine modified BN and the FG are jointly used, so that a synergistic interaction effect can be achieved in the aspects of heat-conducting property, dielectric property and mechanical strength. The epoxy composite material disclosed by the invention can obtain excellent heat-conducting property, dielectric property and insulating property under the compatibility of specific raw materials. And when the curing agent with a long molecular chain is adopted, the epoxy composite material can obtain excellent flexibility, and the problem of brittleness of the existing epoxy composite material is solved. A research basis is provided for preparation and performance research of the flexible epoxy composite material, and the flexible epoxy composite material has a good application prospect.

This invention discloses a micro-wedge splitting test device and a method for testing fracture parameters of quasi-brittle materials. The device includes a micro-sample, a groove on the upper part of the micro-sample, and a force-transmitting component. The force-transmitting component comprises a wedge, a roller, and a force-transmitting block connected in sequence. Compared with existing standard wedge splitting test devices, the ratio of the fracture cross-section to the volume of the micro-sample increases by more than 1.8 times, and the ratio of the shoulder width to half-width of the micro-sample decreases by less than 10%. By controlling the ratio of fracture cross-section to sample volume and the ratio of sample shoulder width to sample half-width, the device can reduce the size of the wedge splitting test device while ensuring that the crack forms and propagates stably at the center. Furthermore, by limiting the load rate to approximately 0.1 mm / min, the device ensures stable energy release during the micro-splitting test, making the micro-wedge splitting test device suitable for testing the fracture performance of small-sized functional components.

The invention relates to the technical field of black metal materials, in particular to saw blade steel with excellent repeated welding performance and a manufacturing method of the saw blade steel. The high-strength and high-toughness steel comprises the following chemical components in percentage by weight: 0.46%-0.55% of C, 0.3%-0.8% of Si, 0.4%-0.6% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.0010%-0.0020% of B, 0.10%-0.20% of Zr, 0.24%-0.35% of Co, 1.2%-1.5% of Co / (C / 10 + Mn / 5 + 60B) and the balance of Fe and inevitable impurities. According to the method, Zr, B and Co are added, and the processes of converter smelting, VD refining, continuous casting, slab heating, rolling and heat treatment are carried out, so that the steel strength and sufficient hardenability are guaranteed, the brittleness of a welding part and a heat affected zone is reduced, and the repeated welding performance of the saw blade steel is improved.

The invention belongs to the technical field of mechanical manufacturing and material science, and particularly relates to an artificial intelligence chip inductor powder mold surface strengthening treatment method and system, which comprises the steps of mold matrix mechanical shock strengthening pretreatment, preparation of a gradient diffusion layer, a toughness bonding layer and a superhard wear-resistant layer in sequence without breaking vacuum, and post-treatment. The system is integrated vacuum treatment equipment and realizes continuous treatment without breaking vacuum. Surface mechanical shock strengthening is introduced in the pretreatment stage of a mold base body, and a strengthening layer with a fine grain structure, high-density dislocation and remarkable residual compressive stress is formed on the surface layer of the mold. According to the strengthening layer, the fatigue strength and the plastic deformation resistance of the mold base body are effectively improved, a tough bearing substrate is provided for growth of the subsequent surface strengthening layer, and therefore the problem that the binding force between a traditional strengthening layer and a brittle base body is insufficient is fundamentally solved, and the fatigue fracture resistance of the whole mold structure is remarkably improved.

This invention relates to a method for preparing ultra-pure smelting of high-strength and high-toughness special steel at ultra-low temperatures. The chemical composition (wt%) is controlled as follows: C≤0.01%, Si≤0.05%, Mn≤0.05%, S≤0.005%, P≤0.005%, Ni: 17.5~18.5%, Co: 8.0~9.0%, Mo: 3.0~3.8%, Al: 0.05~0.15%, Ti: 0.20~0.35%, H≤1.0 ppm, O≤16 ppm, N≤15 ppm, with the balance being Fe and other unavoidable impurities. Core Technology: A five-element synthetic slag system of CaO-SiO2-Al2O3-MgO-CaF2 is introduced during the VIM stage. Utilizing the high-speed directional solidification effect of VAR steady-state remelting, and through matching the smelting environment and cooling rate, the coarse, brittle titanium sulfide phase is transformed into finely dispersed Al-Mg-Ti-S-O multiphase composite oxides. This achieves composite modification of inclusions and reduces their number density from 45 inclusions / mm². 2 Reduced to 8.5 pieces / mm 2 It effectively eliminates the hazards of large particles >4μm. The average grain diameter of the original austenite is refined from 42.37μm to 26.38μm, the elongation of the material reaches 21.06%, and the impact energy is as high as 143.63J, significantly improving the resistance to brittle fracture and possessing extremely high engineering application value.

The application discloses a kind of plasma spraying self-reduction TiC / Ti composite coating and its preparation method and application, belong to thermal spraying coating field, TiC powder, deionized water and binder are mixed and stirred and ball milled, and TiC spherical powder is prepared by spray granulation;Using plasma spraying process, TiC spherical powder is sprayed on substrate, so that TiC occurs self-reduction reaction to generate Ti metal phase, and forms plasma spraying self-reduction TiC / Ti composite coating on substrate;In plasma spraying self-reduction TiC / Ti composite coating, Ti metal phase is distributed between TiC ceramic phase, and forms layered inlay structure.The application uses TiC powder as raw material, and generates Ti metal bonding phase in situ by adjusting and controlling plasma spraying process parameters during spraying process, avoids additional metal bonding phase and subsequent annealing treatment, simplifies process flow and reduces cost.The bonding strength of the prepared plasma spraying self-reduction TiC / Ti composite coating can reach 52.40 MPa at most, which significantly improves the problem of large brittleness and poor interface bonding of traditional TiC coating.

The invention discloses a method and system for evaluating the dynamic brittleness of an underground gas storage, and the method comprises the steps: carrying out an indoor experiment on a cover rock sample, and obtaining a dynamic brittleness-plasticity characteristic containing a rock fatigue damage state; forming a static brittle-plasticity curve based on the logging curve of the sampling well; homing the sampling depth in the static brittle-plasticity curve, and constructing a mathematical correlation model representing two brittle-plasticity relationships through dynamic and static brittle-plasticity characteristics under different sampling depths; based on pre-stack seismic data of the underground gas storage where the sampling well is located, a static brittle-plasticity data body is obtained, and the static brittle-plasticity data body is converted into a dynamic brittle-plasticity data body through the data association model. According to the invention, the three-dimensional dynamic brittle-plasticity attribute of the cap layer can be obtained.

The application discloses a rare earth high-strength dual-phase steel and a forming method and application thereof, and belongs to the technical field of dual-phase steel. The forming method of the rare earth high-strength dual-phase steel comprises the following steps: converter smelting, LF refining, RH refining, adding cerium iron and yttrium iron at the end of the RH refining or before continuous casting, continuous casting, three-stage hot rolling, cold rolling and three-stage annealing. The rare earth high-strength dual-phase steel has good cold stamping formability, high weldability, no rare earth element segregation, no cracking of steel forming, high yield, and can be directly used to prepare automobile bodies after cold stamping forming at normal temperature. There is no rare earth inclusion or coarse carbon nitride brittle bulk agglomerate on the surface layer of the weld, the rare earth element is in a dispersed distribution state, has excellent dispersion strengthening effect, the weld is not prone to cracking, and the mechanical properties of the weld are superior to those of the base material.

The invention relates to the technical field of laser precision machining, in particular to a double-laser synergistic grinding combined machining device and method for a ceramic-based composite material, and the double-laser synergistic grinding combined machining device and method for the ceramic-based composite material are used for high-hardness and high-brittleness materials such as C / SiC and Si3N4. The traditional mechanical or single laser processing is easy to cause cracks and interlayer stripping, and nanosecond flat-top laser shaped by a shaper is adopted to realize uniform ablation under high energy density so as to quickly remove large-volume materials; then, a grinding needle conducts precise grinding on the groove bottom and the side wall under real-time monitoring of a CCD, and ablation residues and uneven layers are reduced; femtosecond laser is used for conducting cold machining finishing on the ground area, a stress layer and microcracks are removed, the machining process is efficient and stable through the synergistic effect of the three parts, and the problems of heat influence and crack accumulation in a single technology are solved.

The application relates to the technical field of building materials, in particular to a full-recycled coarse aggregate and fiber composite impact-resistant concrete and a preparation process, which comprises the following components: cement 389-393 parts, river sand 785-793 parts, recycled concrete aggregate 1085-1095 parts, water reducing agent 5.863-5.867 parts, nylon fiber 1.13-1.19 parts, steel fiber 31.1-31.7 parts and tap water 160-200 parts. The full-recycled coarse aggregate is combined with the nylon fiber and the steel fiber in a specific proportion, and the dosage of the cementing material, the aggregate and the water reducing agent is optimized, so that the building solid waste is recycled, the consumption of the natural aggregate is reduced, the integrity and the toughness of the recycled concrete matrix are improved, the generation and the expansion of the micro cracks under the impact load are effectively inhibited, the defects of the traditional recycled concrete, such as the brittleness and the insufficient impact resistance, are improved, and the concrete has better compressive resistance, tensile resistance and impact resistance mechanical properties.

The present application relates to the field of precision transmission equipment manufacturing technology, and particularly relates to a preparation method of a vacuum low-temperature active brazing inner steel outer aluminum composite needle tooth shell, which comprises the following steps: 1, constructing a three-layer composite structure of a rigid inner sleeve, a filler transition layer and an aluminum outer sleeve; 2, after precise machining and pretreatment of the composite structure, performing high-vacuum three-stage stepwise temperature control low-temperature active brazing in a high-vacuum brazing furnace, grading stress relief annealing and deep cold dimensional stabilization treatment; 3, taking the end face and the center hole of the composite component as a unified precision reference, after overall closed-loop precision machining, using a high-precision coordinate grinding machine to precisely machine the needle tooth mounting hole; 4, strengthening the partitioned surface and performing safety detection. The present application realizes overall innovation from five dimensions of material system, interface structure, brazing process, heat treatment system and precision control route, and completely solves the technical problems of composite loosening, brittle phase cracking, precision loss of control, deformation out of tolerance, interface cavity and brazing defects and the like which have existed in the industry for a long time.

This invention discloses a cobalt-based alloy sand, a method for preparing and optimizing the surface of the damaged area, relating to the field of alloy repair. The cobalt-based alloy sand includes Cr, Ni, Mo, Ti, Ta, B, and Y, with the remainder being Co and / or unavoidable impurity elements. The method for optimizing the surface of the damaged area mainly involves sandblasting the surface of the damaged area twice. This invention can sandblast the damaged area surface to achieve the purpose of surface modification, thereby inhibiting the aggregation of Si-rich and B-rich brittle eutectic phases at the interface during powder metallurgy and improving the interfacial bonding strength of the repair joint.

The invention relates to the technical field of air filtration, discloses a high-temperature-resistant efficient filter, and aims to solve the problems that an organic filter material of a traditional filter is poor in temperature resistance, ceramic fibers are high in brittleness and high in cost, and an existing filter element is insufficient in support, uneven in flow field and prone to failure at high temperature, so that the performance is reduced at the temperature of 400 DEG C or above. The filter comprises a stainless steel outer frame which is encircled and fixed by a plurality of plate bodies; the metal filter screen is arranged on the outer side of the air inlet side of the outer frame; the filter element is arranged in the outer frame and is formed by alternately stacking glass fiber filter paper and aluminum foil; the sealant is injected into the junction of the edge of the filter element and the outer frame. In addition, the aluminum foil wave crest can be provided with a filiform reinforcing structure and a quartz fiber functional layer. The H13-level filtering efficiency at the instant high temperature of 550 DEG C is achieved, the structural stability, the sealing reliability and the low airflow resistance are all considered, and the service life is prolonged.

The application provides a high bending performance steel and a preparation method thereof, and relates to the technical field of low alloy steel plate manufacturing. The chemical composition of the high bending performance steel provided by the application comprises the following components in percentage by mass: C: 0.10%-0.14%, Si: 0.15%-0.30%, Mn: 1.00%-1.20%, P: 0.018% or less, S: 0.005% or less, Als: 0.012%-0.040%, Nb: 0.015%-0.030%, Ti: 0.015%-0.025%, N: 0.0045% or less, H: 0.0002% or less, and the rest is Fe and inevitable impurities. The application reduces brittle inclusions and grain boundary segregation by optimizing the chemical composition ratio of the steel, and reduces the cold bending cracking risk from the root, and the high bending performance steel provided by the application has excellent plasticity, toughness and bending performance.

The invention belongs to the technical field of metal material processing, and particularly relates to a method for producing high-strength steel from low-grade raw materials, which comprises the following steps: smelting the low-grade raw materials mainly comprising scrap steel after pretreatment to obtain initial molten steel; deep purification and component fine adjustment are carried out through LF furnace refining and RH vacuum degassing; a high-quality casting blank is obtained through continuous casting under dynamic soft reduction; and finally, two-stage controlled rolling is combined with a multi-stage flexible cooling process to complete preparation. According to the method, residual elements are converted into a strengthening phase by optimizing the Ni / Cu proportion, phase change strengthening and multi-scale precipitation strengthening are synchronously achieved through the quenching-partitioning-tempering (Q-P-T) technology, the defects of unstable performance and hot brittleness caused by raw material impurities in a traditional technology are effectively overcome, the purpose that high-strength and high-toughness steel is produced through low-cost raw materials is achieved, and the method is suitable for large-scale production. The defects of unstable product performance and low percent of pass caused by many raw material impurities and large component fluctuation in the traditional process are overcome from the source.

The invention belongs to the technical field of polypropylene reinforced composite materials, and particularly relates to a polypropylene material with improved low-temperature brittleness and a preparation method thereof. Aiming at the problems in the prior art, the invention provides a polypropylene material with improved low-temperature brittleness and a preparation method thereof, the polypropylene material comprises the following components in parts by mass: 100 parts of polypropylene, 10-40 parts of glass fiber, 5-20 parts of modified needle-like wollastonite treated by treating fluid, 4-10 parts of compatilizer and 0.5-2 parts of anti-aging master batch, the treating fluid is prepared from 1 to 3 parts of silane coupling agent and 0.01 to 0.2 part of beta nucleating agent. The beta nucleating agent is used for modifying polypropylene to form a beta crystal form with better performance, and wollastonite is used for replacing part of glass fibers, so that the low-temperature brittleness of the glass fiber reinforced polypropylene composite material can be greatly improved, and the pressure resistance at high temperature is not influenced.

This invention provides a method and apparatus for interface control in steel-aluminum dissimilar metal additive manufacturing, relating to the field of additive manufacturing technology. The method mainly includes: acquiring current process parameters and performing additive manufacturing based on these parameters; acquiring interface temperature field data during the manufacturing process; determining temperature characteristic parameters based on the interface temperature field data; inputting the temperature characteristic parameters into a prediction model to obtain interface brittle phase characteristics; determining the interface bonding strength based on the interface brittle phase characteristics; responding to the interface bonding strength not meeting a preset threshold, calling a reverse adjustment model to determine the process parameter adjustment amount; and adjusting the additive manufacturing process parameters based on the process parameter adjustment amount. This invention enables proactive and precise control of the morphology and layer thickness of the interface brittle phase, thereby improving the interface bonding strength.

The invention relates to the technical field of ground vibration prevention, and discloses a steel plate and base combined micro-vibration prevention base which is of an up-down composite laminated structure and comprises a stainless steel panel layer and a concrete base layer from top to bottom. The stainless steel panel layer and the concrete base layer are rigidly connected through an anchoring system pre-buried in concrete to form an integral stress unit; and the upper surface of the stainless steel panel layer is constructed into an integrated composite functional surface comprising a plurality of mounting planes with different heights. The stainless steel panel is used for replacing a traditional epoxy self-leveling coating to serve as an equipment installation face, stainless steel materials are high in inherent rigidity and good in toughness, intrinsic brittleness of epoxy materials is avoided, and the risk of brittle cracking of the surface due to loads or temperature difference or impact is fundamentally eliminated.

This invention relates to the field of ceramic materials and their preparation technology, and particularly to a Pt-doped perovskite ceramic composite material, its preparation method, and its application. The Pt-doped perovskite ceramic composite material provided by this invention uses platinum (Pt) as the dopant phase, and combines a sol-gel assisted doping method with a two-step sintering process using solid-state methods to uniformly distribute Pt in nanoparticle form on Sm... 0.5 Sr 0.5 The ZrO3 ceramic grain boundary region (forming a grain boundary nano-Pt phase) enhances near-infrared reflectivity and reduces thermal radiation absorption while maintaining the stability of the main phase lattice. This invention reduces the thermal conductivity of the ceramic composite material while improving its high-temperature stability through the interfacial regulation effect of the grain boundary nano-Pt phase. This invention also significantly improves the toughness and crack resistance of Pt-doped perovskite ceramic composite materials by constructing Pt nanoparticles to "pinneck" cracks at the ceramic grain boundaries, thus overcoming the intrinsic brittleness of ceramic materials.

The invention discloses a TOPCon-0BB assembly multi-stage welding method based on a low-temperature welding strip, relates to the technical field of photovoltaic assembly manufacturing, and effectively prevents a packaging adhesive film from permeating into a contact interface in the main welding process through partition scanning preheating and generation of a controllable adhesive film pre-wetting state. A clean initial condition is created for forming high-quality metallurgical bonding; in combination with closed-loop monitoring and regulation of the growth state of the IMC layer, it is ensured that a welding spot has enough mechanical strength, meanwhile, the brittleness problem caused by the too thick IMC layer is avoided, and therefore a welding interface has excellent conductivity and toughness, multiple physical fields are innovatively introduced to intervene and optimize the welding process, and the welding quality is improved. The structural stability and the anti-fatigue performance of the assembly are greatly enhanced; according to the method, the self-adaptive calibration parameters for different packaging material systems are dynamically generated by acquiring and identifying the welding process route identifier of the assembly, so that the process window is greatly widened, and the compatibility of different materials is enhanced.

The application provides a processing method for heat treatment of a substrate surface laser cladding stainless steel powder, a material prepared by the method and an application, and belongs to the technical field of surface modification of metal materials. The processing method of the application modifies the cladding layer of 300M steel and AISI 420 stainless steel, so that the strong and tough substrate provides stable mechanical support for the cladding layer, and plastic deformation or cracking of the substrate due to thermal cycling during the cladding process is avoided. The heat treatment can regulate the carbon activity and phase composition of the substrate surface layer, inhibit the carbon migration phenomenon easily occurring at the interface between the cladding layer and the substrate, prevent the formation of a brittle carbide layer, and significantly improve the metallurgical bonding strength. At the same time, through the improvement of the laser cladding parameters and the adaptive heat treatment and post-treatment, the technology not only prolongs the service life of the substrate, but also strengthens the corrosion resistance and wear resistance of the surface.