6results about How to "Eliminate internal defects" patented technology

The invention discloses a defect repairing device and method for a metal component, and the device comprises a closed container which comprises a cabin body, a cabin door, an insulating cylinder, and an insulating storage platform; the bin door and the bin body are opened and closed to form a sealed cavity; the insulating cylinder is arranged in the sealing cavity, and an opening in one side faces the bin door; the insulating object placing table is arranged in the insulating cylinder and is used for placing a metal component; the gas pressurization system is located outside the closed container, communicates with the sealing cavity and is used for providing pressurized gas, so that the interior of the sealing cavity is pressurized to preset process pressure; the pulse current system comprises a pulse power supply and a current applying part, the pulse power supply is located outside the closed container, the current applying part is located in the insulating cylinder, the pulse power supply is conductively connected with the current applying part through a wire, and the current applying part is used for making contact with the metal component and applying pulse current. The application of the electric pulse treatment technology in defect repair of the metal component is realized, and the metallurgical-grade repair of the defects of the metal component is efficiently, quickly and accurately realized.

The invention discloses a built-in concrete distributing device and method for a tubular pile steel mold. The device comprises a material receiving assembly, a material distributing assembly, a stirring assembly and an additive spraying assembly. And a loading vehicle of the material receiving assembly bears the lower template with the built-in reinforcement cage to move. A discharging pipe of the material distribution assembly can axially stretch into the reinforcement cage for center material distribution, and concrete is prevented from being attached to stirrups. The stirring assembly synchronously vibrates and stirs during material distribution through an adjustable stirring rod, and it is ensured that concrete is uniform and compact. The admixture can be added into the admixture spraying assembly according to needs. The using method comprises the steps that the reinforcement cage is positioned, and the discharging pipe extends into the reinforcement cage; carrying out material distribution, synchronous stirring and additive spraying; and closing the mold after completion. The problems that concrete adheres to ribs, distribution is uneven, and performance regulation and control are inconvenient are solved, and the production efficiency and the forming quality of the pipe pile are improved.

The invention relates to the technical field of batteries, in particular to a negative electrode material preparation method based on a negative electrode aged hard carbon material, which comprises the following steps: firstly, crushing and grading an aged hard carbon precursor to obtain particles with a preset particle size; the preparation method comprises the following steps: performing pretreatment such as acid washing, alkali washing, water washing and ethanol washing, mixing a purified precursor with a coating material in proportion to form a uniform coating layer, pre-sintering in a protective atmosphere, and preliminarily stabilizing a material structure by controlling parameters such as a heating rate; and carrying out specific surface area detection on the pre-sintered primary product, and dynamically adjusting pre-sintering process parameters according to the specific surface area detection to ensure that the pore structure of the material reaches the standard. And performing high-temperature carbonization treatment on the material meeting the standard so as to repair the carbon layer structure and improve the conductivity. And finally, performing quality judgment by detecting the first coulombic efficiency of a finished product. According to the invention, the first coulombic efficiency, the specific capacity and the cycling stability of the regenerated hard carbon material are improved, and the recycling of the aging material is realized.

The application discloses a composite system for enhancing corrosion resistance of high-entropy alloy and a use method thereof, and relates to the technical field of high-entropy alloy processing. The heat treatment device, the oxidation treatment device and the laser cleaning treatment device are connected with the control panel respectively, so that the temperature, oxidation and laser action of the high-entropy alloy in the processing process can be effectively controlled; the heat field action can accelerate the diffusion of high-entropy alloy elements to obtain more uniform component distribution; the oxidation can quickly generate an oxide protective film on the surface of the high-entropy alloy to isolate corrosion; and the laser cleaning can adjust the surface and interface structure of the high-entropy alloy and help to eliminate surface and internal defects. Through the heat field action, the oxidation and the laser action, the synergistic effect among processes, the corrosion resistance of the high-entropy alloy can be significantly improved, the three-dimensional and comprehensive improvement of the corrosion resistance is realized, and the high-entropy alloy has a wider application space and application value.

This invention discloses a high-temperature resistant and creep-resistant asbestos-free composite sealing board and its preparation method. The board is made from raw materials comprising 30-50 parts inorganic fibers, 10-20 parts high-temperature resistant organic fibers, 25-45 parts high-temperature resistant functional fillers, and 8-18 parts composite binder. The composite binder is pre-mixed from liquid phenolic resin and nano-silica sol at a dry weight ratio of 1:(0.5-2). The board has a localized inorganic reinforcing network formed by the accumulation and curing of nano-silica sol in the pores and interfaces of the fiber network. The preparation method includes: fiber dispersion and pulping, composite slurry preparation, wet paper forming, supplementary impregnation and pre-curing, segmented hot pressing curing, and post-heat treatment. This invention, by combining an organic-inorganic composite bonding system with a specific process, significantly improves the board's resistance to compression creep and sealing durability at high temperatures, solving the technical problem of easy loosening and leakage of traditional asbestos-free sealing materials under extreme conditions.

The invention discloses a preparation method of a high-toughness impact-resistant box plate anti-collision appearance package, and particularly relates to the technical field of high-performance plant fiber composites.According to the package, bleached softwood and hardwood pulp are used as substrates, modified aramid pulp is introduced for reinforcement, and carboxylated butyronitrile latex and nano-zinc oxide are used for preparing pre-crosslinking toughening emulsion. After wet molding, the composite material is prepared by adopting a gradient variable-temperature hot-pressing process of pre-hot-pressing dehydration, high-temperature plasticizing crosslinking and cold-pressing surface finishing. According to the invention, an'ion coordination-covalent bond 'dual network and a dynamic sacrifice bond mechanism are constructed, energy is dissipated through chemical bond breakage when the material is impacted, and the toughness and collision resistance of the material are remarkably improved in cooperation with the microcosmic bridging effect of the aramid pulp, so that the defect of high brittleness of a traditional paperboard is overcome. And meanwhile, gradient hot pressing endows the packaging surface with high-density and high-gloss plastic-like texture, and unification of functions and appearance is achieved.