44results about How to "Restoration of mechanical properties" patented technology

The invention provides a method and a device for recovering an oil and gas reservoir rock mechanics underground in-situ model. The method comprises the following steps of: measuring rock mechanics parameters of an oil and gas reservoir; counting rock mechanics property influence parameters of the oil and gas reservoir; calculating the anisotropy strength of the rock mechanics parameters; obtaining a correlation between the rock mechanics parameters and the rock mechanics property influence parameters of the oil and gas reservoir; obtaining a correlation between the rock mechanics property influence parameters and the anisotropy strength; and recovering the oil and gas reservoir rock mechanics underground in-situ model by adopting the rock mechanics parameters, the anisotropy strength of the rock mechanics parameters, the correlation between the rock mechanics parameters and the rock mechanics property influence parameters of the oil and gas reservoir and the correlation of the rock mechanics property influence parameters and the anisotropy strength. By the method, the effectiveness and the accuracy for recovering the oil and gas reservoir rock mechanics underground in-situ model can be improved.

The invention discloses a nanometer colloid particle-assembled high-strength self-repairing injectable composite colloid gel material and a preparation method and application thereof. According to the preparation method, two-phase colloid particles with opposite electric charges are uniformly blended in an alkaline or acidic environment, an acidifying agent or alkalizing agent is added to induce the pH of the solution to recover the neutrality, electrostatic self-assembly among the two-phase colloid particles is initiated, and a uniformly-dispersed composite gel network is formed, wherein the gel is high in mechanical strength and wide in regulation and control range, the elasticity modulus of the gel can be regulated and controlled within the range of 10 Pa-100 kPa, and the self-repairing efficiency of the gel is higher than or equal to 100%. The silicon dioxide-gelatin composite colloid gel which has both the high mechanical strength and the self-repairing performance is finally and successfully prepared, and it is verified that the composite gel still can quickly recover the mechanical strength after being broken by shear force many times; in addition, the composite gel has the excellent injectable property and plasticity and can be used for an in-vitro cell culture matrix material by serving as an injectable biological material.

The invention provides an electromagnet field and ultrasonic wave combined device for remedying osteoprosis. The device comprises a power system, a signal generator powered by the power system, at least an electromagnet field treatment head and an ultrasonic wave treatment head driven by the signal generator. The electromagnet field generating device of the invention can wholly remedy the osteoprosis, enhance the density of human body bones, change the electric and chemical environment of a bone tissue, and influence and correct the growth, the restoration and the maintenance of the bone tissue; the ultrasonic wave emitting device has low density of a radiation bone or a fracture part, can promote the growth of the bone tissue, shorten the healing time of bone injury caused by the osteoprosis, and improve the curative ratio of bone disconnection. The above comprehensive treatment proposal from the whole to the part is applied in remedying the osteoprosis and promoting the rehabilitation of the osteoporosis bone injury. The device of the invention has the advantages that the operation is convenient, and the comprehensive remedy effect is good, and the device is suitable for various constituents and crowds.

The invention provides a polymer damping material capable of being repaired at room temperature and a preparation method and application thereof, and belongs to the technical field of polymer materials. The polymer damping material capable of being repaired at room temperature is prepared from the following preparation raw materials: polyhydric alcohol, isocyanate, a chain extension cross-linkingagent and a solvent. The polyhydric alcohol comprises amino-terminated polyhydric alcohol or hydroxyl-terminated polyhydric alcohol, a molar ratio of the polyhydric alcohol to the isocyanate is (1.1-1.3): 1, and the crosslinking degree of the polymer damping material capable of being repaired at room temperature is 5-30%. The polymer damping material capable of being repaired at room temperature is high in transparency and excellent in mechanical property, spontaneous wound repair can be carried out at the room temperature after mechanical damage, the safety and durability of the material aregreatly improved, the service life of the material is greatly prolonged, and a good damping effect is achieved at the room temperature. Meanwhile, the damping material can be reshaped and recycled when being seriously damaged.

The invention discloses an asynchronous cold rolling forming process of an aluminum alloy stainless steel composite plate. The process comprises the following process steps: 1, rolling and compoundinga stainless steel plate and an aluminum alloy plate in an asynchronous rolling mode, and 2, after asynchronous rolling, diffusing and annealing the composite plate, specifically, in the step 1, online heating is carried out on the opposite surface of the composite plate surface of the stainless steel plate, online cooling is carried out on the opposite surface of the composite plate surface of the aluminum alloy plate online, and the heating temperature is 350 DEG C-850 DEG C; the temperature of the composite plate surface of the stainless steel plate from which the composite plate is rolledis lower than 650 DEG C, and the temperature of the composite plate surface of the aluminum alloy plate from which the composite plate is rolled is lower than 300 DEG C; the rolling reduction rate is20%-90%; the different speed ratio of a roller for asynchronous cold rolling is 1.05-1.50; the thickness ratio of the aluminum alloy plate to the stainless steel plate is 1.5-4.0; and in the step 2, the annealing temperature is 250 DEG C-500 DEG C and the annealing time is 15-120 min. The single-side online heating process for rolling the composite plate is creatively provided so as to improve theinterface bonding strength of the composite plate and realize rolling compounding in an interface semi-melting state.

The invention discloses a post-weld heat treatment method for a high-temperature alloy, belongs to the field of material heat treatment, and particularly relates to a post-weld heat treatment method for a precipitation strengthening type high-temperature alloy for a high-temperature component of an advanced ultra-supercritical (A-USC) power station. The post-weld heat treatment method comprises the following steps of 1) low-temperature solid solution, specifically, keeping the temperature of 20-40 DEG C above the gamma' phase precipitation temperature or the recrystallization temperature (the higher temperature is selected) for 1-2 hours, and then performing air cooling to the aging temperature; and 2) aging, specifically, keeping the temperature for 4-16 hours in a gamma' phase precipitation temperature range, and then air-cooling to room temperature. According to the high-temperature alloy welding joint obtained through the post-weld heat treatment method, the welding residual stress is eliminated to the maximum extent, gamma' strengthening phases are evenly distributed in crystals, strain aging cracks of a welding heat affected zone are effectively avoided, and the mechanical property of the heat affected zone is recovered to the base metal level.

The invention discloses a hydrogel/fibroin nanofiber/neural stem cell integrated transplant capable of promoting VEGF secretion as well as a preparation method and application thereof, and belongs tothe technical field of biological tissue medical engineering. The method comprises the following step: polysaccharide-based hydrogel/neural stem cell gel are adhered to a fibroin nanofiber scaffold through dopamine to form a polysaccharide-based hydrogel/fibroin nanofiber/neural stem cell integrated transplant, wherein the polysaccharide-based hydrogel is a self-healing injectable polysaccharide-based hydrogel. According to the invention, the polysaccharide-based hydrogel embedded with the neural stem cells is adhered to a gap between fibroin nanofiber scaffolds through dopamine to construct the polysaccharide-based hydrogel/fibroin nanofiber/neural stem cells integrated transplant, so that the cells can be promoted to secrete VEGF and fill the defect part, and provide required microenvironment for adhesion, proliferation and directional differentiation of the neural stem cells into neurons, and the neural stem cells can be applied to the field of treatment of cerebral ischemia injuryand promotion of neural stem cell amplification and differentiation.

The invention relates to a mineral admixture for crack self-healing of a steam-cured cement-based material and preparation of the mineral admixture. The mineral admixture is prepared from the following components in percentage by weight: 35%-50% of an expanding mineral component, 40%-55% of a crystalline mineral component and 5%-10% of a calcium ion source mineral component. The mineral components are weighed in proportion and uniformly mixed, and the mineral admixture is prepared. The mineral admixture has the advantages that the self-healing effect is remarkable, the cost is low, the durability of the steam-cured cement-based material is effectively improved and the like.

The invention discloses a liquid-phase mineralizing precursor and a method of repairing demineralized dentine and belongs to the technical field of biomaterials. The liquid-phase mineralizing precursor can repair the demineralized dentine and is a calcium carbonate mineralizing precursor solution containing a polymer and magnesium ions, wherein the concentration of the polymer is 5-100 [mu]g/mL, concentration of Ca<2+> is 1-15 mM, and molar ratio of Mg<2+> to Ca<2+> is 1-6:1. A preparation method of the liquid-phase mineralizing precursor includes steps of: suspending CaCO3 powder in distilledwater and feeding CO2 gas for 1-4 h at room temperature; filtering away residual CaCO3 and feeding CO2 gas for 15-60 min at room temperature; measuring the concentration of Ca<2+> and adding distilled water to regulate the concentration of Ca<2+>; adding the polymer and MgCl2 powder and uniformly mixing the mixture. The liquid-phase mineralizing precursor employs easy-to-obtained raw material andhas simple system, and is a creative break for therapy on oversensitive dentine.

The invention discloses an organic-inorganic composite cement-based self-healing agent based on authigenic healing and a preparation method and an application thereof. The preparation method comprises the following steps: dissloving 2-acrylamido-2-methylpropanesulfonic acid and carboxylic acid monomers in distilled water, adjusting pH, then adding acrylamide monomers, increasing the temperature to 50-60 DEG C, and obtaining a mixed solution; adding a silane coupling agent into absolute ethyl alcohol to obtain a silane coupling agent solution; adding an initiator into distilled water, and uniformly stirring to obtain an initiator solution; under stirring, dropwise adding the silane coupling agent solution and the initiator solution into the mixed solution at the same time; reacting to obtain a faint yellow viscous liquid; and adding cement into the faint yellow viscous liquid, stirring, performing vacuum freeze drying, grinding or crushing to obtain the organic-inorganic composite cement-based self-healing agent based on authigenic healing. The method is low in production cost, simple in process, easy for industrial production, high in autogenous healing efficiency and capable of realizing effective repair of cracks.

The invention relates to a novel multifunctional polar polyolefin material as well as a metal complex material, a preparation method and an application thereof. The multifunctional polar polyolefin material is a random copolymer formed by copolymerizing an ethylene monomer represented by a formula CH2 = CH2, an alpha-olefin comonomer represented by a formula CH2 = CH-(CH2) m-CH3 and an eugenol comonomer represented by the formula, wherein m, X and Y are as defined herein, the multifunctional polar polyolefin material can be simply and effectively prepared under mild conditions, and can be usedas a compatible agent and an adhesive, and a multifunctional polar polyolefin metal complex material with significantly improved mechanical properties and a self-repairing function can be obtained after transition metal modification.

The invention relates to the technical field of preparation of steel wire rope fastening equipment, in particular to a manufacturing method of a seamless frame of a steel wire rope fastening device. The method comprises steps including preheating treatment, rolling treatment, cooling treatment, heat treatment, punching treatment and cutting treatment. The finished product frame prepared through the manufacturing method adopts a seamless integrated structure, the whole frame is evenly stressed, stress concentration is avoided during stressing, and the whole frame is firmer in structure and safer and more reliable to use. A seamless steel pipe is used as a raw material directly and is a common standard part. The raw material is cheap and easy to obtain, and the machining cost is low. The manufacturing method adopts the multi-stage graded rolling technology and is simple to operate and low in implementation difficulty, the frame can be machined to the designed size conveniently and is not welded by a welding machine, and the energy consumption is substantially reduced. Meanwhile, damage of welding to material properties is also reduced.

The invention discloses a method for repairing a fiber-reinforced resin-based composite material. The method comprises the following steps of: 1, preparing corresponding powder according to damage and defect types of the fiber-reinforced resin-based composite material; 2, cleaning and removing dust, chippings, dirt and other impurities in damage and defect areas of the fiber-reinforced resin-based composite material; 3, carrying out texturing treatment on the damage and defect areas of the fiber-reinforced resin-based composite material; and 4, spraying the prepared powder to the damage and defect areas through a supersonic cold spraying technology, depositing the powder to form a surface repairing layer, and completing repairing of the damage and defect areas. The method has the advantages of high efficiency, low energy consumption, environmental friendliness and the like, the surface of a repaired part is smooth, and the mechanical property is restored to a certain extent.