150results about How to "Repair crack" patented technology

The invention provides a shape memory intrinsic type self-repairing material which is prepared from the following components: a crystal polyether or polyester diol monomer, a diisocyanate monomer, a monomer containing a dynamic covalent bond micromolecule chain extender, a rubber elastic body, a free radical polymeric ultraviolet light initiator, a multi-sulfydryl curing agent and conductive packing. If the shape memory intrinsic type self-repairing material is suffered from mechanical damage, a conductive path consisting of internal conductive packing is damaged, the resistance of the material is increased, under the action of external current, temperature rise can be resulted from the Joule heating effect of the material self, a reversible shape memory effect of the material can be excited, cracks of the material can be shrunk and closed, meanwhile after macroscopic cracking closure, the dynamic covalent bonds inside the material can recombine the material as molecular chains of a fracture surface are diffused with one another and subjected to reversible chemical reaction, at the moment, paths of the conductive packing in the material can be recovered, the resistance of the material can be reduced to an original level, the Joule heating effect can be eliminated, the temperature can be reduced to the room temperature, and the self-repairing process has the characteristics of reversibility and repeatability.

The invention discloses an exterior wall coating material capable of finishing working through one-time painting.The exterior wall coating material is prepared from natural resin, polyvinyl acetate emulsion, deionized water, quartz powder, zinc oxide, sulfonated hyperbranched polypyrrolone modified graphene oxide, polybenzimidazole modified meso-porous silicon, KH-560 and inorganic pigment.The exterior wall coating material capable of finishing working through one-time painting has the better adhesive capacity, aging resistance, covering power, washing resistance, scratching resistance, stain resistance, self-cleaning performance, fastness, acid resistance and alkali resistance, longer service life and the like compared with existing water-based exterior wall coating materials.

A saline soil solidifying method is disclosed, whose basal principle uses the reaction of salinity producing katogene and added firming agent to generate a dilatability outcome yield, which allows the dilatability destroy to take place ahead, the dilatability structure becomes dense from loose by pressing dense, finally the gel component cements the saline soil. The used firming agent includes component i (aluminiferous component), component ii (calcium containing component), component iii (cementing component, with a slower generating velocity), and the doped amount is 1-30% of the mass of the saline soil. The usage mode of the firming agent includes stirring component i, component ii and the saline soil and waiting for 1-30d, doping in component iii after pressing, which can be used as road bed, pavement, or producing saline soil brick; simultaneously adding component i, component ii and component iii in the saline soil, pressing after waiting for 1-20d, which can be used as road bed, pavement, or producing saline soil brick; and also being capable of taking component i, component ii and component iii as firming agent of deep layer padding process and the like for deep consolidation of salination land base.

The invention discloses a microcapsule type additive for corrosion-resistant coating and a preparation method thereof. The microcapsule type additive is prepared by the following components by weight percent, 40wt-80wt% of water, 5wt%-35wt% of air-drying type film-forming substance, 0.01wt%-10wt% of anti-rusting agent, 5wt%-30wt% of capsule-wall resin and 0.05wt%-2wt% of emulsifying agent; the mixture of the air-drying film-forming substance and the anti-rusting agent is wrapped in the capsule-wall resin which is urea resin, melamine-formaldehyde resin or modified polymer of the urea resin and melamine-formaldehyde resin or mixture of two or more than two substances. The additive disclosed by the invention has the advantages that the additive is added into the corrosion-resistant coating, the corrosion resistance of the prepared coating can be further improved, especially when the paint film is damaged due to action of external force, the added additive can release a restoration agent and the anti-rusting agent to restore the damage and inhibit the corrosion expansion by self, so that the service life of the paint film is prolonged.

The invention discloses a method for repairing internal cracks of a weld joint of a container device. The method comprises the steps of S1, detecting the weld joint of the container device so as to determine the positioning depth of the cracks in the weld joint; S2, removing the weld joint in which the cracks are determined according to the positioning depth of the cracks in the weld joint, so as to form a weld joint groove for removing the cracks in the weld joint; S3, filling and welding the weld joint groove; S4, thermally processing the repaired weld joints subjected to filling and welding. With the adoption of the method for repairing the internal cracks of the weld joint of the container device, the cracks of various types in the weld joint can be effectively repaired, and the completeness of the performances of the container device can be maintained.

The invention discloses a method for adopting laser fuse wires for repairing a mold, crack defects of the mold are repaired, and the mold is made of 5CrNiMo steel or 5CrMnMo steel. The method includes the steps that (a), the surface of the mold to be repaired is cleaned to remove oil stains and impurities; (b), the mold is preheated; (c), by the adoption of a wire feeding method laser cladding technology, cracks of the mold are repaired. Through the steps, cladding layers obtained on the cracks of the mold are compact and even in texture and free of pores, inclusion and other defects. The repairing method is simple in technology, low in cost, capable of effectively repairing the cracks of the mold and suitable for industrial production.

The invention discloses a production process for manufacturing high-strength recycled aggregates from construction waste. By multistage screening, impurities in the construction waste are removed specifically to effectively reduce the content of the impurities in the construction waste, and high-strength clean recycled aggregates can be obtained. By chemical slurry infiltration and cement wrapping, owing to specific properties of added chemical substances, crack repairing and pore filling of the recycled aggregates are realized while interface adhesiveness is improved, and performances and quality of the recycled aggregates are remarkably improved. In conclusion, the production process has advantages of multistage screening, reasonability in arrangement and high strength and performances of products.

The invention relates to a method for repairing heat damage crackles of a ceramic based composite material. According to the method, a whole SiC coating on the surface of a sample with heat damage crackles is directly and thoroughly abraded, and then the SiC coating is re-deposited. A deposition surface is smooth, closed pores of a C/SiC composite material for abrading the whole SiC coating are opened, which is beneficial for ensuring that the subsequent deposition of a matrix and a coating becomes more compact and the density gradient is reduced; and the crackles formed in the SiC matrix can be effectively repaired, so that the oxidation resistance of a sample in a high-temperature environment is improved more efficiently. By adopting the method, density defects and heat damages of C/SiC are effectively repaired, micro-crackles generated in a preparation process of C/SiC can be reduced, the density gradient and porosity of C/SiC from surface to inside are reduced, the crackles generated by the heat damages are gradually repaired, the oxidation resistance recovers and is relatively improved, and the bending strength is greatly improved.

The invention relates to a reparative conductive adhesive. The reparative conductive adhesive consists of the following components in parts by weight: 100 parts of epoxy resin I, 250-900 parts of sheet silver powder, 10-50 parts of a curing agent I, 0-40 parts of an epoxy diluent I, 3-20 parts of a coupling agent and 8-60 parts of composite mesoporous particles, wherein a curing temperature of an epoxy resin composition I consisting of the curing agent I, the epoxy resin I and the epoxy diluent I is 60 DEG C-80 DEG C; the composite mesoporous particles adopt mesoporous silicon dioxide loaded with nano sliver as a carrier, a wall capsule material layer is arranged on the outer surface of the carrier, an epoxy resin composition II is contained in a mesopore, the curing temperature of the epoxy resin composition II is not lower than 150 DEG C, an epoxy diluent II in the epoxy resin composition II is not dissolved or difficultly dissolved in water with a boiling point not lower than 150 DEG C. The invention further relates to a preparation method of the reparative conductive adhesive. The conductive adhesive is high in repair efficiency and can avoid generating stress concentration at repaired cracks.

The invention discloses a concrete bottom coating of a concrete work protection polyurea material. The concrete bottom coating comprises an A ingredient material and a B ingredient material, wherein the A ingredient material is prepared from 70 to 134 parts of isocyanate, 80 to 150 parts of polylol, 2 to 20 parts of coupling agents and 50 to 150 parts of solvents through being metered in parts by weight; the B ingredient material is prepared from 25 to 75 parts of chain expanding agents, 1 to 5 parts of antioxidants and 50 to 140 parts of solvents through being metered in parts by weight. The defects that the attachment force of the existing bottom coating is greatly reduced or lost in the long-time water soaking or high-humidity state, and a polyurea material bulges and falls off are overcome. The concrete bottom coating has the advantages that the use is convenient; the performance is excellent.

A sulfidation corrosion preventing method for protecting a substrate from sulfidation corrosion, a sulfidation corrosion-resistant high temperature member having excellent sulfidation corrosion resistance, and a method for repairing a heat exchanger tube having cracks are disclosed. A silicon oxide layer is formed on a surface of a substrate; a titanium-containing coating fluid containing a titanium metal or a titanium compound is coated on the silicon oxide layer, heated and oxidized to form a first titanium oxide layer; a carbon layer is formed on a surface of the first titanium oxide layer; and a titanium-containing coating fluid is coated on the carbon layer, heated and oxidized to form a second titanium oxide layer. The substrate is protected or repaired with the silicon oxide layer, the first titanium oxide layer, the carbon layer, and the second titanium oxide layer.

The invention discloses a wire arc additive manufacturing method of Al-Mg-Si alloy. The wire arc additive manufacturing method of Al-Mg-Si alloy comprises the following steps that firstly, cooling rolling is used for assisting in arc additive forming; secondly, milling is carried out on the side face and the top face of an additional material body; thirdly, a friction stir machining device is usedfor carrying out friction stir machining on the additional material body, meanwhile, in the friction stir machining process, a cooling rolling device is used for exerting cooling rolling on the sidewall of the additional material body; fourthly, finish milling is carried out on the upper surface of the additional material body for preparing of arc additive forming of the next step; fifthly, theabove steps are circularly and repeatedly executed until the final forming of the part is finished. Dendritic growth and grain refining in the Al-Mg-Si alloy additive forming process can be completelybroken, defects of air holes, cracks and the like can be effectively overcome, meanwhile, in the wire arc additive manufacturing and the modification process thereof, cooling is applied, the problemsof additional material body overheating and microstructure coarsening caused by overheating can be solved, and the mechanical property, particularly, plasticity and fatigue properties, of the addition material body can be greatly improved.

The invention discloses an integral repair method for the longitudinal intensive damage of a blade crown of an aero-engine turbine rotor blade. The integral repair method for the longitudinal intensive damage of the blade crown of the aero-engine turbine rotor blade comprises the following steps of firstly mechanically grinding the blade, integrally removing a damaged blade crown, adopting laser for repairing cracks under a casting cover plate, and fixing a blade tip cover plate onto the blade crown of the blade; then adopting an integral type laser solid forming technology for integrally forming the blade crown, manually processing a formed blade crown surface, and recovering a runner type surface; and finally, carrying out nondestructive testing on the repaired turbine blade, and puttinginto use after the blade meets a criterion. According to the integral repair method for the longitudinal intensive damage of the blade crown of the aero-engine turbine rotor blade provided by the invention, the integral repairing method is adopted, so that not only is degradation material removed thoroughly, but also the one-by-one repair process is avoided, and the workload is reduced; and meanwhile, through using a special repair material, a combination property of the crown material is improved.

The invention discloses an emulsified asphalt cold paving material and belongs to the technical field of road engineering. The emulsified asphalt cold paving material is made by stirring and mixing linseed oil with a gelatin liquid according to a volume ratio of (1:20)-(1:30); further stirring and mixing with a sodium sulfate solution which is 5-8 times the volume of the gelatin liquid; cooling; further adding a formaldehyde solution which is 1-2 times the volume of the linseed oil; adjusting the pH value; leaving to stand to cure, filtering, and drying so as to obtain modified microcapsules;crushing steel slag, and screening so as to obtain steel slag powder; performing a stirring reaction on the steel slag powder with hydrochloric acid in a mass ratio of (1:30)-(1:50), filtering, and drying so as to obtain modified steel slag powder; by stirring and mixing asphalt, an emulsifier, aggregate, coated sodium peroxide, carbomer, the modified capsules, the modified steel slag powder and water, thereby obtaining the emulsified asphalt cold paving material. The emulsified asphalt cold paving material disclosed by the technical scheme of the invention has the characteristics of excellentmechanical properties, water resistance and flowability.

The invention relates to a whitening tooth patch containing a photocatalyst and a preparation process of the whitening tooth patch, belongs to the technical field of oral care products, and aims to solve the problems that existing tooth patches use peroxide, easily cause tooth hypersensitivity and is uneven in whitening effect, poor in durability and inconvenient to use, and the packages of the tooth patches are not environmentally friendly. The whitening tooth patch comprises nano titanium dioxide, bioactive glass, acrylate/polyoxyethylene-20 octadecanol ether methyl acrylate copolymer, gel and a moisturizing agent. The whitening tooth patch has the advantages that the nano titanium dioxide is used as the photocatalyst to play a whitening role; the bioactive glass improves tooth color brightness, and the nano titanium dioxide can be attached to the surface of the teeth along with the bioactive glass to generate a continuous whitening effect; the nano titanium dioxide and the bioactiveglass are evenly dispersed in the gel substrate to achieve an even whitening effect; the whitening tooth patch is prepared into a roll shape and can be cut at will during use, the whitening tooth patch is packaged through a self-sealing zipper bag, packaging cost is lowered, and environment protection is achieved.

The invention provides a functional crystallization master batch, a preparation method thereof and a waterproof material and belongs to the field of inorganic materials. The functional crystallization master batch is composed of a nanoscale calcium carbonate aluminum oxide composite powder body and chelated titanate. The preparation method includes preparing and mixing calcium carbonate powders and the nanoscale calcium carbonate aluminum oxide composite powder body. The waterproof material is composed of, by weight, 6-8% of the functional crystallization master batch, 4-6% of methyl cellulose thickening agents, 2-4% of anhydrous citric acids retarders, 25-35% of finely grinding quartz sands, and the balance cements. The functional crystallization master batch has excellent crystallization performance and usage performance, the preparation method is simple, low in production cost, safe in operation and suitable for industrial production, and the waterproof material has excellent impermeability pressure, compression strength and rupture strength.

The invention provides an Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method. The manufacturing method comprises the following steps of (1) conducting arc additive forming through cooling and rolling assistance; (2) conducting milling on the side face and the top face of an additive material body; (3) conducting friction stir processing on the additive material body through friction stirprocessing equipment and conducting cooling and rolling on the sidewalls of the additive material body through a cooling and rolling device during friction stir processing; (4) conducting finish milling on the upper surface of the additive material body to make preparation for the next step of arc additive forming; and (5) cyclically repeating the above steps until final forming of a part is completed. Through the Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method, dendritic growth and grain refinement in the Al-Zn-Mg-Cu alloy additive forming process can be completely abolished, and the deficiencies such as pores and cracks are effectively repaired; meanwhile, during the wire and arc additive manufacturing and modifying process, microstructure roughening caused by overheat of the additive material body is prevented through cooling, and the mechanical performance, especially plasticity and fatigue performance, of the additive material body is greatly improved.

The invention relates to the technical field of lithium battery materials, and in particular relates to a modification method for coating a silicon-carbon composite negative electrode material interface with modified asphalt. The asphalt-coated silicon-carbon composite negative electrode material is subjected to interface modification by utilizing specially selected phenolic resin, so that the silicon-carbon composite negative electrode material with high rate performance and high first rate is prepared. And a compact nano carbon coating layer with low pore defect degree is formed, so that the defects such as cracks and holes on the surfaces of nano silicon and graphite can be effectively repaired, irreversible consumption of a large number of active lithium ions in the charging and discharging process of a battery is avoided, and irreversible reduction of the battery capacity is remarkably reduced. Therefore, the asphalt-coated silicon-carbon composite negative electrode material is subjected to interface modification by utilizing the mutual synergistic effect of the phenolic resin and the asphalt, the capacity diving condition during high-current charging and discharging of the battery is obviously delayed, and the rate capability and coulombic efficiency of the material are improved.

The present invention discloses a special wheat fertilizer for hilly area soil testing and fertilizer recommendation. The special wheat fertilizer for hilly area soil testing and fertilizer recommendation is prepared from the following raw materials in parts by weight: 24-26 parts of ammonium dihydrogen phosphate, 80-90 parts of waste tea residues, 15-18 parts of ammonium chloride, 280-300 parts of vermicompost, 36-40 parts of crushed eggshells, 50-60 parts of pyrite ash, 8-12 parts of dolomite powder, 10-12 parts of sodium silicate, 28-32 parts of a modified tapioca starch solution, and a proper amount of water; The special wheat fertilizer provided by the present invention is prepared according to soil fertility performance of hilly areas such as Shucheng county, Caitang village and the like as well as fertilizer requirement and fertilizer absorption property of wheat; an organic nutrient body is formed by scientifically proportioning nutrients, so that balanced nutrient supply can be ensured; disease resistance of roots, stems and leaves of wheat can be improved because of addition of amino acid chelate nutrients, and soil fertility condition of hilly areas is modified because of addition of a plurality of waste material organic matters, thereby providing technical support for improving wheat yield and quality.