50748 results about "Ultimate tensile strength" patented technology

The invention relates to the technical field of welding processing, and discloses a dissimilar metal welding joint temperature field optimization control method and system. Real-time temperature field scanning is conducted on the dissimilar metal welded joint, image segmentation processing is conducted on a temperature field image obtained through scanning, temperature data of a weld joint area, a heat affected area and a base metal area are extracted, and whether the temperature gradient exceeds a preset threshold value or not is judged; aiming at an area with non-uniform distribution of heat input quantity, analyzing the performance of the welding joint under the combined action of thermal stress and mechanical stress, obtaining the difference between residual stress distribution and plastic deformation capacity, and analyzing a stress concentration area by combining with the yield strength of the material; and a mapping relation between the welding process parameters and temperature field distribution is established, and a welding process parameter adjustment prediction model is obtained through historical welding process parameters and corresponding temperature field data training in combination with heat flux density distribution. The problems of uneven heat input, stress concentration and the like in dissimilar metal welding are effectively solved, and the welding quality and efficiency are improved.

Embodiments of the invention provide a write head for perpendicular recording in which the magnetic field intensity applied at a read element is reduced with larger write-field gradients and the distance between a write element and a read element is small. In one embodiment, a pair of magnetic bodies for shielding a read element are provided on the leading and trailing sides of the read element respectively and whichever one of the two shields is the longer in the length from the air bearing surface is shorter than the length up to the back contact position PBK at which a main pole and an auxiliary pole are connected.

To provide a metal paste capable of efficiently providing a joined body having reliability high in electrical and mechanical strength even when narrowed in pitch, and to provide a method for manufacturing the joined body.SOLUTION: A metal paste comprises metal particles and a solvent, and has a shear viscosity of 1 to 100 Pa_s, measured at a shear rate of 10 s-1 at 25°C, wherein a value (TI value) obtained by log-transforming a ratio of a shear viscosity measured at a shear rate of 0.1 s-1 and a shear viscosity measured at a shear rate of 1 s-1 is 0.7 to 1.0.SELECTED DRAWING: Figure 4

The invention discloses a steel wire rod for a 2400-2460 MPa grade stress corrosion resistant prestressed steel strand, the steel strand and a production method. The steel wire rod comprises the following chemical components in percentage by weight: 0.90-0.97% of C, 0.6-1.2% of Si, 0.2-0.8% of Mn, 0.15-0.45% of Cr, 0.02-0.05% of V, 0.01-0.05% of Nb, less than 0.30% of Ni, less than 0.30% of Cu, less than 0.30% of Mo, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.004% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. By optimizing the chemical components and the production process of the wire rod, the strength of the prepared steel strand meets 2400-2460 MPa, the minimum stress corrosion value is 2.5 hours, the median value is 5 hours, and the stress corrosion resistance is obviously superior to that of an existing steel strand.

The invention provides a green and environment-friendly steel wire rod for a 2300 MPa grade steel strand and a production method of the green and environment-friendly steel wire rod. The steel wire rod comprises, by weight, 0.95%-1.05% of C, 0.20%-0.40% of Si, 0.60%-0.90% of Mn, 0.10%-0.40% of Cr, smaller than or equal to 0.030% of V, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% of S, 0.01%-0.04% of Al and the balance Fe. Through the special design of the components and through the processes of converter blowing, LF refining, RH refining, continuous casting, flaw detection and coping, high-speed wire rod rolling, online heat treatment and aging treatment, the strength of a steel strand finished product manufactured after an obtained wire rod is subjected to drawing, twisting and stabilizing treatment reaches 2300 MPa, and the tensile strength of the steel strand finished product reaches 2300 MPa. Meanwhile, the properties such as yield strength and elongation all meet the requirements, and the production method is efficient, green and energy-saving.

The invention discloses a steel wire rod for a 2300-2360 MPa grade stress corrosion resistant steel strand, the steel strand and a preparation method. The steel wire rod comprises the following chemical components in percentage by mass: 0.85-0.91% of C, 0.3-1.0% of Si, 0.2-0.8% of Mn, 0.15-0.45% of Cr, 0.02-0.05% of V, less than or equal to 0.008% of S, less than or equal to 0.010% of P, less than or equal to 0.004% of N, less than or equal to 0.0020% of O and the balance of Fe and other inevitable impurities. The steel wire rod has excellent strength and plasticity, the ultrahigh strength of 2300 MPa or above can be obtained through drawing with a small area reduction rate, surface damage and internal defects of the steel wire rod during subsequent drawing machining are reduced, and the stress corrosion index of the steel strand is improved.

The embodiment of the invention discloses an external wall thermal insulation falling risk prediction method and system based on a deep learning model, and the method comprises the steps: firstly collecting the multi-dimensional state data of a target building external wall, covering the thermal insulation layer material attribute, environment exposure history, structure connection strength, and surface deformation monitoring and construction technology record data; extracting a material aging feature vector from the thermal insulation layer material attribute data, and extracting a space-time distribution feature from the environmental exposure historical data to generate an environmental action feature tensor; fusing structural connection strength and surface deformation monitoring data into a structural deformation association map, converting construction process record data into process defect probability distribution, inputting the data into a pre-trained multi-modal risk prediction network, outputting an outer wall thermal insulation layer falling risk level and risk area thermodynamic diagram, and predicting the falling risk level of the outer wall thermal insulation layer. And finally, generating a dynamic monitoring strategy containing a sensor deployment optimization scheme and a detection period adjustment parameter according to a result, and realizing accurate risk prediction and efficient monitoring.

The present application provides a folding cart. Inclined rods are added between top rods and bottom rods, so that a supporting strength between the top rods and the bottom rods can be increased. The inclined rods are slidably connected to the bottom rods or a frame, so that stability of folding deformation is improved. According to the present application, an overall structural strength and folding stability of a side frame are improved, use requirements of users can be met to the greatest extent.

The invention relates to the technical field of concrete wall materials, and discloses a recycled concrete wall material and a preparation method thereof, the recycled concrete wall material comprises the following components by weight: 300-500 parts of recycled coarse aggregate, 200-400 parts of recycled fine aggregate, 150-300 parts of cement, 30-80 parts of fly ash, 3-8 parts of a water reducer, 5-15 parts of reinforced fiber, and 20-30 parts of a modified composition. Comprising the following steps: S1, raw material pretreatment, S2, mixing and stirring, S3, molding and curing, and S4, quality detection. The building waste is efficiently utilized, exploitation of natural aggregate is reduced, energy consumption and carbon emission in the production process are reduced, the landfill amount of the building waste and land occupation are reduced, the material strength and durability are good, the waterproof performance is improved, and the crack resistance and seismic resistance of the wall are enhanced.

The invention relates to a hot-rolled wire rod for a 2100MPa-grade bridge cable and a manufacturing method of the hot-rolled wire rod, after the hot-rolled wire rod is formed by rolling high Si-Mn chemical components and spinning at the spinning temperature of more than or equal to 955 DEG C, the wire rod is cooled at the cooling speed of more than or equal to 36 DEG C / s through online molten salt sorbite regulation and control treatment, enters a sorbite phase region from an austenite state, promotes sorbite phase transformation and is subjected to isothermal treatment to remove stress; and finally, roller way slow cooling is conducted, the hot-rolled wire rod with the microscopic structure comprising tempered sorbite with the volume percentage larger than or equal to 95% and the balance being a mixed structure composed of ferrite and fused sorbite is prepared, deteriorated structures such as network carbide and martensite can be effectively controlled, wire rod structure regulation and control, strength and plasticity matching and stable production are achieved, and the effects that the tensile strength is 1500-1540 MPa, the tensile strength is high, and the tensile strength is high can be achieved. The composite material is used in the application fields of manufacturing of 2100MPa-grade ultrahigh-strength bridge cables and the like, and is beneficial to reduction of the risk of wire breakage.

The invention relates to the field of metal powder forming, in particular to a metal powder forming device for gear production. According to existing equipment, dead corners of a die are difficult to fill with metal powder, the phenomenon that the metal powder on the inner surface layer of the die is virtually full is easily caused, then the strength of a pressed and formed gear is uneven, and the quality of the pressed and formed gear is affected. A metal powder forming device for gear production comprises a base. The fixing frame is fixedly connected to the base. Due to the fact that the moving wall moves upwards, the space between the moving wall and the mold is enlarged, and the space between the moving wall and the mold can be completely filled with excessive metal powder. And when the vibrator is started, the metal powder can be directly vibrated, so that dead corners between the moving wall and the mold are uniformly filled with the metal powder, the strength of the pressed and formed gear is uniform, and the quality of the pressed and formed gear is improved.

Provided is a high-strength steel sheet having excellent member strength, ductility, stretch flangeability, bendability of a shear end surface, and low-temperature toughness. A high-strength steel sheet having a prescribed component composition and a steel structure in which the area ratio of martensite is 10%-80%, the area ratio of bainite is 2%-70%, the area ratio of ferrite is 80% or less, and the area ratio of retained austenite is 15% or less at a position at 1 / 4 of the sheet thickness. The ratio of the number of martensite blocks in which metastable carbides are present relative to the number of martensite blocks is 2% or more, and the standard deviation [sigma] n of the nano-hardness relative to the average value [Hn] ave of the nano-hardness is 0.60 x [Hn] ave or less when the nano-hardness at 225 points or more is measured at a position of 1 / 4 of the sheet thickness.

The invention relates to the technical field of digital quality management, in particular to a light-weight glass bottle quality digital traceability method and system. The method comprises the following steps: acquiring glass bottle design data, and constructing a lightweight glass bottle model; detecting the structural strength of the bottle body based on the lightweight glass bottle model; carrying out bottle body surface defect detection based on the bottle body structural strength to generate bottle body surface defect data; performing defect tracing based on the bottle body surface defect data to obtain bottle body production defect process data; carrying out wall thickness non-uniformity anomaly detection based on the structural strength of the bottle body to obtain wall thickness non-uniformity data; the alignment offset of the mold core and the mold cavity is evaluated based on the wall thickness non-uniformity data; and carrying out positioning pin fracture detection according to the alignment offset of the mold core and the mold cavity to obtain positioning pin fracture data. The glass bottle production process is optimized based on the digital quality management technology, and the quality recognition rate, the abnormal response speed and the production process transparency are effectively improved.

The invention relates to a hot-rolled wire rod for a 2200MPa bridge cable and a manufacturing method of the hot-rolled wire rod, a high-carbon V-containing chemical component design rolling production line is adopted, after the wire rod is spun into the wire rod at the spinning temperature of more than or equal to 920 DEG C, online molten salt rapid cooling isothermal treatment is carried out, the molten salt treatment time is controlled to be less than or equal to 300s, the wire rod is cooled at the cooling speed of more than or equal to 35 DEG C / s, and enters a sorbite phase region from an austenite state; according to the hot-rolled wire rod, a structure with sorbite as the main part is formed and subjected to isothermal weak tempering to remove stress, finally, roller way slow cooling is conducted, the hot-rolled wire rod with the microscopic structure comprising a mixed structure composed of weak tempered sorbite as the main part and ferrite and fused pearlite as the balance is prepared, the tensile strength can reach 1550-1590 MPa, the percentage reduction of area is 31%-36%, the mechanical property same-circle difference is smaller than or equal to 30 MPa, and the hot-rolled wire rod can be used for manufacturing the steel wire rod. The method is used in the application field of manufacturing of 2200MPa-grade ultrahigh-strength bridge cables and the like, the risk of wire breakage is reduced, and the strength grade of the bridge cables is improved.

The invention belongs to the technical field of metal material engineering, and relates to a light high-toughness low-cost aluminum alloy and a preparation method thereof.The alloy comprises, by mass, 7.0%-9.2% of Mg, 2.5%-4.0% of Zn, 0.06%-0.20% of Zr, 0.01%-0.03% of Sb, main impurities including Fe smaller than or equal to 0.15%, Si smaller than or equal to 0.12%, other single impurities smaller than or equal to 0.05%, the total impurity smaller than or equal to 0.15% and the balance Al. Compared with 2xxx series and 7xxx series aluminum alloys, the alloy has certain advantages in the aspects of density, specific strength, ductility, corrosion resistance and the like, and has a remarkable cost advantage compared with a low-density aluminum-lithium alloy, so that the core competitiveness of an alloy product is improved, and the alloy product has the potential of becoming a next-generation commercial aluminum alloy.

The invention provides a solid waste filling material ratio optimization method of a magnesium slag-steel slag composite cementing material, and relates to the technical field of solid waste filling. The method comprises the following steps: mixing magnesium slag, steel slag, desulfurized gypsum and mineral slag to prepare a cementing material, and carrying out pretreatment and physicochemical property analysis on raw materials by taking tailings and waste rocks as filling aggregates; then designing a cementing material proportioning scheme and carrying out strength test to obtain an optimal ratio of the cementing material; then considering different slurry concentrations and plastic-to-bone ratios, and carrying out an all-solid waste filling slurry rheological test and an all-solid waste cementitious body strength test; and finally, according to the two test results, establishing a multi-objective optimization model taking the on-way resistance and the filling material cost as optimization objectives and taking the strengths of cementitious bodies at different ages as constraint conditions, and determining optimal parameters of the full-solid waste filling material. According to the invention, resource utilization of the metallurgical solid waste and the mine solid waste is realized, the bottlenecks of high carbon emission and high cost of a cement-based filling material are broken through, and a solution is provided for co-processing of the mine solid waste.

To provide a test method for mechanical characteristics of combined electrical, thermal and mechanical deterioration of insulating oil-paper.SOLUTION: The present invention comprises: constructing an AC and DC / thermal / mechanical stress combined deterioration experimental platform; preparing insulating oil-paper samples with different deterioration states; measuring a degree of polymerization and tensile strength test of the insulating oil-paper samples with different deterioration states; acquiring change rules of mechanical characteristics after deterioration; observing microscopic morphology diagrams and XRD spectra of the insulating oil-paper samples with different deterioration states; constructing an amorphous unit cell of a cellulose molecular chain; optimizing a structure; acquiring a cellulose model; constructing an oil-paper mixed model; performing molecular dynamics simulation on the oil-paper samples with different deterioration states based on the cellulose model and the oil-paper mixed model; and constructing the relation between the deterioration of macroscopic mechanical characteristics of insulating oil-paper and changes in microscopic physical and chemical characteristics, where a data basis and theoretical support for prediction of a life of insulating paper are provided.SELECTED DRAWING: Figure 19

The invention belongs to the technical field of metal processing and forming, and particularly relates to seamless metal composite pipe rolling equipment with a multi-fulcrum guide plate adjusting device and a method. The multi-fulcrum guide plate adjusting device comprises an adjusting hydraulic cylinder, a base end cover, a sliding block seat, a sliding block seat pressing plate, a push rod, a Y-shaped connecting frame, a guide plate, a pin shaft, a pin shaft baffle, a sliding block seat end cover, a locking seat, a locking hydraulic cylinder, a universal coupling and an adjusting rod. The guide plate is accurately controlled through the adjusting hydraulic cylinder and the locking hydraulic cylinder to achieve up-down, autorotation, swinging and other multi-freedom-degree position adjustment, the device can be suitable for rolling processes with different working condition requirements, the guide plate does not need to be replaced many times, rolling can be conducted only by adjusting the guide plate, and after the guide plate works for a long time and is abraded, the service life is prolonged. Abrasion loss can be compensated by adjusting the position of the guide plate, and production efficiency is improved; and meanwhile, the push rod and the adjusting rod are clamped and locked through the locking hydraulic cylinder, and it is guaranteed that the multi-fulcrum guide plate adjusting device has enough strength in the rolling compounding process.

The invention belongs to the technical field of soft magnetic materials, and discloses an amorphous nanocrystalline soft magnetic material with high saturation flux density and a preparation method thereof. The preparation method comprises the following steps that an iron-based amorphous strip is crushed into flat powder with the thickness being 5-25 microns and the diameter being 30-80 microns, and scaly amorphous soft magnetic powder is obtained; the method comprises the following steps: performing insulation coating treatment on spherical iron-silicon soft magnetic powder with the average particle size of 2-20 microns to obtain insulation coating modified spherical magnetic powder; and mixing the obtained scaly amorphous soft magnetic powder, the insulating coated modified spherical magnetic powder and bonding resin, performing compression molding, performing annealing crystallization treatment at the temperature of 450-550 DEG C, and then raising the temperature to 600-900 DEG C for sintering treatment to obtain a finished product. According to the amorphous nanocrystalline soft magnetic material and the preparation method thereof, the spherical iron-silicon soft magnetic powder modified through insulation coating is compounded with the scaly amorphous soft magnetic powder, and low loss is maintained while the obtained amorphous nanocrystalline soft magnetic material Bs is remarkably improved.

The invention belongs to the technical field of glue filling control, and particularly relates to a glue filling amount control method and system. According to the method, the glue filling deviation can be controlled within an extremely small range through multi-time iteration control of a stage theoretical value and real-time feedback, the filling consistency and the bonding strength are remarkably improved, initial compensation is conducted in combination with various working condition parameters such as temperature, pressure and materials, the pressure and the diffusion dynamic state are monitored in real time, and the working efficiency is improved. The system can automatically adapt to environmental fluctuation and glue performance change, accurately control the filling amount, respond to overflow and viscosity abnormity in time, reduce glue waste, avoid product reworking caused by excess or insufficient glue, combine closed-loop feedback with maintenance strategies, automatically identify and process abnormal states, improve the automation degree and operation stability of a production line, and improve the production efficiency. Manual intervention is reduced, rapid configuration and expansion can be carried out according to different workpiece shapes, materials and production working conditions, and the device is suitable for various glue filling scenes.

A component (202) is disclosed that includes a body (206) and an additive manufactured (AM) metal mass (200) that includes a first section (292) and a stress relief section (294). The stress relief section (294) includes a porous region (300) having a porosity in which an open spatial volume accounts for 2% to 50% of the total volume of the stress relief section (294). The stress relief section (294) has a smaller at least one of thermal conductivity, tensile strength, ductility, and fatigue strength than the first section (292). A braze material (310) couples the AM metal specimen block (200) to a specimen block opening (204) in the body (206). The stress relief section (294) creates a low stress zone in the metal specimen block (200), which can be located near or adjacent to a high stress zone. The stress relief section (294) reduces residual stress in the metal sample block (200), which reduces related challenges to couple the metal sample block (200) to the body (206) of the component (202), particularly in the case of the use of superalloy materials.

Provided is a friction stir spot welded joint having high cross tensile strength even in the case where a steel sheet having a soft surface layer is used as a material to be welded. An annular groove is formed on an upper surface of an upper sheet out of overlapping steel sheets, and a shape and hardness of a welded portion are appropriately controlled simultaneously.

The purpose of the present invention is to provide: a high-strength steel sheet that has a tensile strength of 980 MPa or greater and that is excellent in ductility, fatigue strength, and blanking properties; and a method for manufacturing the same.　The high-strength steel sheet is characterized by: having a prescribed component composition; the main phase being a bainite phase composed of granular bainite and upper bainite having an area ratio of 85% or greater; the area ratio of a hard second phase that includes fresh martensite and / or a residual austenite phase being less than 15%; the area ratio of the granular bainite to the area ratio of the upper bainite in the bainite phase being 5% to 40%; the difference |Hv1 - Hv2| between the hardness Hv1 at the 1 / 2 position the sheet thickness and the hardness Hv2 at the 1 / 4 position of the sheet thickness being 30% or less in relation to 0.3 TS; and the average crystal grain size of the upper bainite phase being 7 μm or less.

The invention relates to a hot-rolled wire rod for a 2500 MPa bridge cable and a manufacturing method of the hot-rolled wire rod, which are characterized in that after Nb-V-Mo high-carbon component is rolled and spun into a wire rod, the wire rod is cooled at a cooling speed of more than or equal to 33 DEG C / s through online molten salt rapid cooling isothermal treatment, and enters a sorbite phase region from an austenite state to form a structure mainly comprising sorbite and control the precipitation and growth of carbides; the hot-rolled wire rod with a microscopic structure comprising a mixed structure composed of tempered sorbite, ferrite and fused sorbite is prepared through roller way slow cooling, the content of strengthening elements can be increased without weakening the toughness of the material, the material cost is considered, the tensile strength is 1692-1735 MPa, the percentage reduction of area is 25%-30%, and the tensile strength of the steel wire rod is 1692-1735 MPa. The method is used for the application field of manufacturing of 2500 MPa-grade ultrahigh-strength bridge cables and the like, and the wire breaking risk in the drawing and twisting process can be reduced easily.

The invention provides a metal material surface difference analysis method which comprises the following steps: calculating Gibbs free energy at different temperatures by adopting a thermodynamic model according to chemical components and an initial microstructure of a material, and drawing a time-temperature-transformation curve of the material through phase diagram analysis software, obtaining a grain growth kinetic parameter and a recrystallization temperature interval; inputting data information of strength, hardness and toughness in different application scenes by utilizing the established multi-objective optimization model, and searching optimal grain size distribution through a genetic algorithm to obtain an optimal microstructure for balancing various performance indexes; according to the optimal microstructure, a heat treatment process route is reversely designed, finite element software is adopted to simulate temperature field and stress field distribution in the heat treatment process, and control parameters of heating, heat preservation and cooling are determined through iterative optimization.

The invention relates to a characterization method for the influence of the corrosion degree on the interface bonding performance of steel fibers and concrete, and solves the technical problems that a large amount of time and cost need to be consumed by depending on a traditional experimental test method, and the complex influence of corrosion on the interface bonding performance is difficult to comprehensively and accurately reflect. The method comprises the steps that steel fibers which are taken out and subjected to single-pull test operation are subjected to preset acid pickling operation one by one, and the mass loss rates of the steel fibers with different corrosion degrees are obtained through calculation one by one according to mass changes of the steel fibers before and after the acid pickling operation; and fitting the interface bonding strength data corresponding to different corrosion degrees by adopting a preset statistical analysis method to obtain a mathematical expression between the interface bonding strength and the corrosion degrees. The method has the following effects that the influence of corrosion on the bonding performance of the steel fiber and concrete interface is comprehensively evaluated in multiple aspects, and the safety and durability of the steel fiber concrete structure in practical application are improved.

The invention discloses a semi-solid injection-molded high-strength corrosion-resistant magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 7%-8.5% of Al, 1%-4% of Zn, 0.1%-0.8% of RE, 0.02%-0.5% of Ca and the balance of Mg and inevitable impurities. Through component design and process optimization, the liquidus temperature of the alloy is lower than 610 DEG C, and the alloy is insensitive to temperature in the solid fraction interval of 20-40% and is suitable for semi-solid injection molding; the Al content is controlled to form a net-shaped Mg17Al12 phase as a corrosion barrier, and Zn and RE / Ca cooperate to achieve heat treatment strengthening and oxidation film densification. The problem that strength and corrosion resistance of a traditional magnesium alloy are difficult to consider at the same time is solved, and the magnesium alloy is suitable for high-performance light-weight components of automobiles, aerospace and the like.

The invention relates to the technical field of aluminum alloys, in particular to a high-strength light aluminum alloy and a preparation method and application thereof. The aluminum alloy comprises the following chemical components in percentage by weight: 3.5 to 6.5 percent of Mg, 2.5 to 5.0 percent of Zn, 0.2 to 1.0 percent of Cu, 0.1 to 0.4 percent of Mn, 0.05 to 0.25 percent of Zr, 0.05 to 0.25 percent of Sc, 0 to 0.12 percent of Fe, 0 to 0.12 percent of Si and the balance of Al and inevitable impurity elements. Wherein the mass ratio of Mg to Zn is 1.0-2.0, the total content of Mn, Zr and Sc does not exceed 0.5%, the total content of Zr and Sc does not exceed 0.38%, and the mass ratio of Zr to Sc is 0.6-1.5. By accurately controlling the contents and proportions of elements such as Mg, Zn, Cu, Mn, Zr, Sc and the like, perfect combination of high strength and light weight of the alloy is realized. The density of the alloy is smaller than or equal to 2.72 g / cm < 3 >, the yield strength is larger than or equal to 350 MPa, the tensile strength is larger than or equal to 450 MPa, the ductility is larger than or equal to 10%, the welding coefficient is not smaller than 0.75, and the exfoliation corrosion performance is not lower than the EA level.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2100MPa bridge cable and a manufacturing method of the high-strength complex-phase hot-rolled wire rod, and the manufacturing method comprises the following steps: rolling and spinning C-Si-Mn-Cr-Mo chemical components into a wire rod, and carrying out online molten salt tail end quenching isothermal treatment, so that the wire rod firstly passes through front-section molten salt and is cooled at a cooling speed of more than or equal to 35 DEG C / s to enter a sorbite phase region from an austenite state; the method comprises the following steps of: controlling part of austenite to be converted into sorbite, cooling to a bainite phase through rear-section molten salt, carrying out end quenching, controlling bainite phase change, carrying out isothermal tempering to remove stress, and finally carrying out roller way slow cooling to prepare a complex-phase structure comprising tempered sorbite and tempered bainite, so that abnormal structures of network carbides and martensite can be effectively controlled; the high-strength composite phase structure control and plasticity matching are achieved, the tensile strength is 1530-1560 MPa, the percentage reduction of area is 30%-35%, and the method is suitable for manufacturing 2100 MPa-grade ultrahigh-strength bridge cables with large drawing amount and beneficial to reducing the risk of wire breakage.

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.