63results about How to "Improve bending strength" patented technology

The invention relates to a zirconia-based all-ceramic false tooth and a preparation method thereof. A core layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 90 to 94 parts of ZrO2, 5 to 9 parts of Y2O3, 0.1 to 0.5 part of Al2O3, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2, and a shell layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 24.5 to 49.5 parts of CaCO3, 45 to 50 parts of SiO2, 0 to 25 parts of MgO, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2. The preparation process comprises the following steps: performing dry pressing and isostatic pressing on raw materials of the core layer, presintering, and carving to obtain a zirconia-based false tooth biscuit; meanwhile, calcining raw materials of a shell layer, then adding deionized water, a dispersing agent and an adhesive, and carrying out ball milling and mixing to obtain calcium-magnesium-silicon-based ceramic slurry; and coating the calcium-magnesium-silicon-based ceramic slurry on the surface of the zirconium oxide-based false tooth biscuit, and sintering to obtain the zirconium oxide-based all-ceramic false tooth provided by the invention. The zirconia-based all-ceramic false tooth has good jade texture and is closer to the natural color of natural teeth.

The application discloses a lithium-free high-heat-resistant ceramic mud and a preparation method thereof, and relates to the technical field of ceramic materials. In the preparation of the lithium-free high-heat-resistant ceramic mud, alumina is reacted with 3-(2,3-epoxypropoxy) propyl trimethoxysilane to obtain pre-modified alumina; the pre-modified alumina is reacted with starch to obtain modified alumina; ethyl acetoacetate, isopropyl alcohol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide are mixed to form a spinning solution, the spinning solution is electrospun, and then immersed in yttrium oxide sol to obtain alumina-zirconia-yttria composite fibers; the modified alumina, talc, alumina-zirconia-yttria fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water are stirred and mixed, and vacuum pugging is carried out to obtain the lithium-free high-heat-resistant ceramic mud. The lithium-free high-heat-resistant ceramic mud prepared by the application has good thermal shock resistance and bending strength after sintering.

A preparation method of a controllable CNTs@PyC interface layer in carbon / carbon composite material, ZIF-67 with different distribution patterns is carried on the surface of carbon fiber; CNTs are in-situ generated from ZIF-67 through chemical vapor deposition, CNTs are distributed on the surface of carbon fiber in different growth patterns; PyC is deposited on the surface of carbon fiber, different shapes of CNTs@PyC interface layer shape are obtained, by controlling the different growth patterns of ZIF-67 on the surface of carbon fiber, the different distribution states of CNTs derived exist, so as to realize the controllable and adjustable interface layer shape, to meet the application requirements under different conditions: the circular ring shape reduces the stress concentration of CNTs@PyC interface layer, avoids a large number of cracks in the composite material. The wave shape is beneficial to the application of carbon / carbon composite material in the service environment under the tensile condition, prolongs the crack propagation path along the interface layer, effectively relieves the PyC ring cracking phenomenon around the fiber, and is more easy to realize the interlocking effect between the interface layer and the carbon matrix, effectively prevents the interface debonding phenomenon, and greatly improves the mechanical properties of carbon / carbon composite material.

The present application relates to the technical field of bamboo fiber composite material, in particular to a purification preparation method of bamboo fiber reinforced natural polymer composite material. The bamboo raw material is crushed and treated by steam explosion to obtain primary bamboo fiber; the primary bamboo fiber is sequentially subjected to organic solvent dewaxing treatment and oxidation system selective delignification treatment to obtain purified bamboo fiber; the purified bamboo fiber is treated in a tannin acid solution to form a polyphenol interface layer on the surface thereof; and a solution containing polyvalent metal ions is added to the treated bamboo fiber to form a coordination cross-linking interface layer on the surface of the bamboo fiber. The present application constructs a stable interface layer between the fiber and the natural polymer matrix. The interface layer can effectively transfer stress, significantly improve the tensile strength, bending strength and shear strength of the composite material, and solve the problem of weak interface and easy delamination of traditional natural composite materials.

This invention discloses a low-temperature resistant plastic bucket and its preparation method, belonging to the field of plastic bucket technology. This invention utilizes the synergistic effect of maleic anhydride-grafted ethylene-octene copolymer, nano-aluminum nitride, and cold-resistant toughening agent, combined with gradient injection molding, gradient annealing, and low-temperature aging processes to eliminate internal stress in the product. This allows the product to possess excellent tensile strength, flexural strength, and drop resistance reliability at -10℃. Under full load, the drop height can reach 1.2m without cracking or leakage. The synergistic effect of each component achieves a balance between low-temperature toughness and structural strength, significantly improving the stability and service life of the plastic bucket under low-temperature conditions.

The present disclosure provides a multilayer electronic component and a mounting plate thereof, the multilayer electronic component including a main body including a dielectric layer and internal electrodes alternately disposed with the dielectric layer, the main body having a first surface and a second surface opposite to each other in a thickness direction, a third surface and a fourth surface opposite to each other in a length direction, and a fifth surface and a sixth surface opposite to each other in a width direction, an external electrode disposed on the third surface and the fourth surface and extending to a portion of the first surface and a portion of the second surface, and a metal terminal disposed on the first surface or the second surface and connected to the external electrode, the metal terminal having a recess provided on an outer side surface thereof in the length direction, and an upper hole and a lower hole respectively provided on an upper surface and a lower surface thereof, and the upper hole being not superimposed with the lower hole in the thickness direction.

The application discloses a kind of 3D printing equipment and printing method of magnetic control microsphere space lattice, it is related to printing forming technical field, equipment includes printing station, drive mechanism, sintering mechanism, control mechanism and at least one grabbing head;Printing station is used to stack multiple loose magnetic microspheres as support medium;Grabbing head is used to grab each forming magnetic microsphere, and can be released to the predetermined spatial position above the support medium of printing station;Drive mechanism is connected with grabbing head, and is used to drive grabbing head to move in space;Sintering mechanism is used to sinter the adjacent forming magnetic microsphere on printing station;Control mechanism is connected with grabbing head, drive mechanism and sintering mechanism, and can control the action of grabbing head, drive mechanism and sintering mechanism respectively.The 3D printing equipment and printing method of magnetic control microsphere space lattice provided by the application improve printing efficiency, material utilization and forming piece performance.

This invention discloses a low-temperature thermoplastic composition and the low-temperature thermoplastic material made therefrom, as well as its applications, relating to the field of medical materials technology. The low-temperature thermoplastic composition mainly comprises the following components: thermoplastic resin, reinforcing filler, and radiation crosslinking agent; the thermoplastic resin includes polyurethane, and each 100 parts of the low-temperature thermoplastic composition contains at least 27 parts of a first polyurethane with a flow start temperature of 50-95°C and an open time of at least 6 minutes. Through the selection of polyurethane and the combination of reinforcing filler, the low-temperature thermoplastic composition enables the low-temperature thermoplastic material to have lower shrinkage and a longer operating time, allowing the low-temperature thermoplastic material prepared from the composition to be used for fixation of parts with higher operating time requirements.

This invention provides an epoxy resin-based composite waterproofing material, its preparation method, and its application. After curing, the epoxy resin-based composite waterproofing material exhibits high flexural strength and Shore hardness, as well as excellent oil penetration resistance. It is suitable for coating the tank walls, bottom plates, and floating roof surfaces of oil storage tanks, curing to form a waterproofing layer. This enhances the oil storage tank's resistance to oil leakage, thereby extending its service life and preventing economic losses and environmental hazards caused by oil leakage.

This invention discloses a dielectric ceramic substrate material with a negative capacitance temperature coefficient, its preparation method, and its application, relating to the field of functional ceramics technology. It comprises, by mass percentage, 76wt%~93.5wt% CaTiO. 3 2wt%~15.5wt% SrTiO 3 1wt%~8.5wt% MgTiO 3 The ceramic substrate material contains 1.5wt%~3.2wt% modifier and 2wt%~4.5wt% cooling agent. It possesses excellent flexural strength, good surface roughness, and bonding strength, making it suitable for fabricating miniaturized chip-type microwave monolayer ceramic capacitors with low dielectric loss. It exhibits a negative temperature coefficient of capacitance (-(1500±500)ppm / ℃, (-55~125)℃), which can compensate for capacitance drift caused by temperature changes and prevent signal distortion. Furthermore, it is flat, non-deformable, and has good rectangularity, exhibiting excellent surface properties.

The application discloses a kind of high-performance outdoor full package imitation wood composite board and preparation method thereof, relate to polyurethane composite board technical field, the full package imitation wood composite board includes base board, and the polyurethane material of setting in the lower surface and the four around of base board, and the resin material of setting in upper surface.Its preparation method includes the following steps: pouring polyurethane material in the silica gel mould after surface treatment, place base board, mould pressing, make the polyurethane material with wood texture around and lower surface of base board composite, obtain intermediate product A;Resin material is rolled on the upper surface of intermediate product A, and is dried, to obtain full package imitation wood composite board;The silica gel mould after surface treatment is prepared by transferring real solid wood board texture.

The invention relates to the technical field of polymethyl methacrylate, and discloses a flame-retardant polymethyl methacrylate material and a preparation method thereof.The flame-retardant polymethyl methacrylate material is obtained by reacting polymethyl methacrylate, a hydroxyl-terminated flame retardant and p-toluenesulfonic acid. The linear polymethyl methacrylate is crosslinked into a three-dimensional network structure, so that the crosslinking degree between molecular chains is enhanced, the molecular chains are not easy to slip under stress, good structural stability is maintained, and the polymethyl methacrylate has high tensile strength and bending strength. The flame retardant contains piperazine rings and phosphate structures, forms an intumescent flame-retardant system, generates phosphoric acid substances, nitrogen and other gases during combustion, promotes dehydration of a matrix to form an intumescent carbon layer, isolates oxygen, prevents heat conduction, inhibits the combustion process, remarkably reduces the peak value of the heat release rate and the total heat release amount, and has excellent flame-retardant performance.

The application belongs to the field of high polymer materials, and particularly discloses a modified basic magnesium carbonate and a PA12 composite material and a preparation method thereof.The preparation method of the modified basic magnesium carbonate comprises the following steps: adding sodium carbonate and magnesium chloride into a sodium hydroxide solution to perform a water bath reaction to obtain the basic magnesium carbonate; adding the basic magnesium carbonate and acrylic acid into deionized water to perform a water bath reaction to obtain acrylic acid modified basic magnesium carbonate; and adding the acrylic acid modified basic magnesium carbonate, glycidyl methacrylate and an initiator into an organic solvent aqueous solution to perform a water bath reaction to obtain the modified basic magnesium carbonate.The modified basic magnesium carbonate prepared by the application can decompose and absorb heat at high temperature, release water vapor and carbon dioxide and other non-combustible gases, dilute the oxygen concentration on the surface of the combustion object, and reduce the temperature of the combustion area, so as to play a role in flame retardation.In addition, the magnesium oxide produced by decomposition covers the surface of the material to form a protective layer, and further prevents the combustion.

The present application belongs to the technical field of preparation of multi-curved surface silicon carbide, and discloses a preparation method of reaction sintering multi-curved surface silicon carbide whole plate, comprising: mixing 100 parts of alpha-SiC powder, 15-20 parts of composite carbon source, 1-2 parts of silicon carbide fiber, 2.3-3.8 parts of dispersing agent, 8-12 parts of water-soluble phenolic resin, 2-4 parts of additive and 42-46 parts of water according to weight parts, pre-dispersing, ball-milling, spray granulating, pressing into multi-curved surface green body; the green body is stacked with graphite support parts and filled with graded silicon particles, and is subjected to step-by-step degreasing and step-by-step reaction sintering under vacuum argon, and then is cooled after temperature control to obtain the product. Through the synergistic effect of formula control of composite carbon source, specific ternary additive and fine sintering process, the technical problem of sintering cracking and cracking of multi-curved surface whole plate is eliminated, and the product density, bending strength and fracture toughness are effectively improved.

The utility model discloses an anti-bending stainless steel bar which is characterized in that a reinforcing rib is arranged in the center of a bar body, the bar body is made of stainless steel, the reinforcing rib is made of carbon fiber composite materials, a composite layer is arranged on the outer surface of the bar body, a frosted layer is arranged on the outer surface of the composite layer, and the bar body is made of stainless steel. A plurality of first connecting grooves are formed in the surface of the frosted layer, the first connecting grooves are rectangular, anti-bending rings are slidably connected to the interiors of the first connecting grooves, first connecting assemblies are slidably connected to the interiors of the first connecting grooves, and second connecting assemblies are arranged on the opposite faces of the first connecting assemblies; and due to the design of the connecting assemblies and the reinforcing ribs, the borne force can be distributed more uniformly, so that local stress concentration is reduced, the bending strength is improved, deformation caused by external force in the using process is reduced, abrasion and corrosion of the material surface can be prevented, and the service life is prolonged.

The application discloses a kind of thermosetting resin materials for semiconductor chip sealing and preparation method thereof, it is related to epoxy resin technical field.The thermosetting resin materials for semiconductor chip sealing, including the following weight fraction raw materials: epoxy resin 50-60 parts, modified benzo-oxazin 10-15 parts, toughening agent 4-6 parts, inorganic filler 250-300 parts, silane coupling agent 10-15 parts, release agent 1-2 parts, curing agent 25-30 parts, curing accelerator 0.5-0.8 parts;The thermosetting resin materials for semiconductor chip sealing prepared by the application has excellent spiral flow length, bending strength, thermal conductivity, glass transition temperature and lower water absorption.

This invention belongs to the technical field of plastic packaging bottles, specifically relating to a bio-based degradable cosmetic plastic packaging bottle and its preparation method. The packaging bottle is prepared from the following raw materials in parts by weight: 60-80 parts of compounded polylactic acid; 10-25 parts of polybutylene adipate terephthalate; 10-20 parts of modified bamboo powder; 2-8 parts of epoxidized soybean oil; 1-2 parts of anti-hydrolysis agent; 0.1-0.5 parts of antioxidant; and 0.1-0.5 parts of opening agent. The packaging bottle prepared by this invention simultaneously possesses high tensile strength, elongation at break, flexural strength, and notched impact strength, and exhibits excellent weather resistance.

The application relates to the technical field of ceramics, and discloses a high-strength high-temperature-resistant ceramic material and a preparation method, wherein graphene oxide and polyamide naphthalene sulfonate dispersant are reacted, then mixed with clay, quartz powder, talc powder, fly ash and the like through ball milling, calcined, and finally a high-strength high-temperature-resistant ceramic material is obtained. The polyamide naphthalene sulfonate is grafted to the surface of graphene, the dispersibility of the graphene is improved, and the mechanical strength of the ceramic material is improved. The main chain of the polyamide naphthalene sulfonate dispersant contains an amide bond, and the side chain contains a naphthalene sulfonate structure, so that the quartz, fly ash and the like can be dispersed, the apparent porosity of the ceramic is significantly reduced, and the bending strength and other mechanical properties are improved.

The utility model provides a photovoltaic greenhouse agricultural shed support which comprises a support body, the support body comprises a plurality of stand columns and a plurality of girders erected on the stand columns, the girders are arranged side by side, a plurality of purlines are arranged on the surfaces of the upper sides of the girders at intervals, and photovoltaic panels are installed on the purlines; first angle aluminum is arranged on the opposite surfaces of every two adjacent girders, a sunlight plate is connected between the first angle aluminum arranged on the opposite surfaces of every two adjacent girders, second angle aluminum is arranged on the opposite surfaces of every two adjacent stand columns, and a sunlight plate is connected between the two second angle aluminum arranged on the opposite surfaces of every two adjacent stand columns. The sunlight plates are fixed through the angle aluminum to replace traditional plastic cloth, the problems that the plastic cloth is prone to aging and needs to be replaced frequently are solved, the durability of materials is remarkably improved, and the splicing connection mode of the sunlight plates and the angle aluminum avoids the problem that girders and purlines cannot interfere with covering installation films due to the fact that photovoltaic plates need to be installed.

The invention discloses a thermoplastic composite material prepared based on a waste composite material pyrolysis product and a preparation method of the thermoplastic composite material, and particularly relates to the technical field of fiber reinforced composite material reutilization, and the thermoplastic composite material comprises a matrix phase, a first-stage reinforcement phase and a second-stage reinforcement phase. The preparation method of the thermoplastic composite material comprises the following steps: crushing the waste carbon fiber composite material, and controlling the pyrolysis temperature to be 450-600 DEG C and the pyrolysis time to be 30-60 minutes to obtain a pyrolysis solid product; separating the obtained pyrolysis solid product to respectively obtain a fraction A and a fraction B; premixing the fraction A and cracked carbon micro powder according to the mass ratio of (2: 1)-(5: 1) to obtain a mixed reinforcement; and carrying out melt blending on the mixed reinforcement and the thermoplastic resin matrix, and carrying out extrusion molding to obtain the thermoplastic composite material. The thermoplastic composite material prepared by the scheme aims to synchronously reinforce an interface and a matrix by constructing a multi-stage reinforcing structure and realize all-component high-value utilization of a pyrolysis product of the waste carbon fiber composite material.

The utility model provides an adjustable air window for a coal mine, which belongs to the technical field of mine ventilation and comprises a frame body and a plurality of louvre blades, the louvre blades are respectively and uniformly arranged in a hollow cavity of the frame body through a rotating shaft, one end of the rotating shaft is provided with an adjusting gear, and the adjusting gear is meshed with an adjusting rack. The adjusting rack is connected with a sliding mechanism, a servo motor is arranged on one side of the frame body, the output end of the servo motor is connected with a transmission mechanism, and the transmission mechanism is connected with a rotating shaft. The transmission mechanism comprises a plum coupling, a corner device, a pin coupling and a speed reducer, the output end of the servo motor is connected with the speed reducer, the speed reducer is connected with the corner device through the pin coupling, and the corner device is connected with one end of the rotating shaft through the plum coupling. Through the design of the transmission mechanism and the sliding mechanism, the transmission efficiency can be effectively improved, accurate adjustment of the ventilation quantity is achieved, and safety, reliability, high efficiency and energy conservation are achieved.

This utility model discloses an interventional puncture needle, relating to the field of medical device technology. It includes a needle hub and a needle tube. One end of the needle tube is fixedly connected to the needle hub, and the other end is the puncture end. The outer wall of the needle tube is provided with three sections of composite texture. The outer wall of the puncture end of the needle tube has a double-helix cross-shaped groove. The outer wall of the middle section of the needle tube has a reverse-interlaced variable-pitch spiral pattern. The outer wall of the section of the needle tube near the needle hub has a wavy groove. The double-helix cross-shaped groove, the reverse-interlaced variable-pitch spiral pattern, and the wavy groove on the outer wall of the needle tube can generate obvious echo signals under the action of ultrasound. These echo signals form a clear imaging effect in the ultrasound image, significantly improving the clarity and stability of ultrasound imaging. Furthermore, the wavy groove can reduce needle tip stress and improve the bending strength of the needle tube, providing a more precise and safer tool for interventional medical treatment.

This invention belongs to the field of electrical ceramics technology, and relates to a carbon ceramic composite material, its preparation method, and a resistor sheet. The composite material uses clay and kaolin as the ceramic matrix, introduces submicron graphite as the conductive phase, and incorporates nano-ceramic reinforcing powder. It is prepared through multi-stage wet mixing, spray drying granulation, and pressureless sintering under an inert atmosphere. The preparation method involves first pre-treating the material at medium temperature under vacuum to remove moisture and organic matter, followed by high-temperature sintering under inert gas protection to obtain a uniform and dense carbon ceramic composite matrix, on which electrodes and a high-resistivity layer are formed. Through the dispersion strengthening effect of the nano-ceramic reinforcing powder and the synergistic control of process parameters, the microstructure of the material is effectively improved, significantly increasing the compressive and flexural strength of the resistor sheet, reducing the risk of mechanical failure caused by electro-thermal-mechanical shocks during transportation and service, and making it suitable for use in high-voltage and ultra-high-voltage circuit breaker closing resistors.

This invention discloses a method for preparing carbon fiber epoxy composite materials that combine high mechanical properties and a low coefficient of thermal expansion. Belonging to the field of composite materials, it addresses the technical challenge of simultaneously improving the mechanical properties and reducing the coefficient of thermal expansion of composite materials using existing carbon fiber processing methods. By non-covalently modifying carbon nanotubes with ionic liquids, unlike traditional covalent modification methods, the intrinsic strength of carbon nanotubes is preserved, constructing a multi-mechanism synergistic interface reinforcement system. This specifically addresses the key problems of traditional sizing agents having a single interfacial effect and hindered stress transmission. In this invention, flexible polyimide acts as a bridge at the interface, while rigid carbon nanotubes construct an effective armor on the fiber surface. The two form a rigid-flexible composite structure at the interface, which effectively alleviates interfacial stress concentration, significantly improves interfacial stress transmission efficiency, achieves uniform dispersion of external loads, and ultimately improves the mechanical properties of the carbon fiber epoxy composite material.

The utility model discloses an endoscope bending tube and an endoscope, a connecting mechanism is arranged between adjacent joints, the connecting structure I comprises a rotating sheet, the rotating sheet protrudes along the axial direction of the joints, the two sides of the rotating sheet are provided with limiting grooves, and clamping parts are arranged in the limiting grooves. The second connecting structure comprises a clamping groove, limiting pieces are arranged on the two sides of the clamping groove, the limiting pieces are arranged at the ends of the joints and extend and protrude, and clamping jaws are arranged at the ends of the limiting pieces. During connection, the limiting pieces surround the two sides of the rotating piece, the clamping jaws are clamped into the limiting grooves in a matched mode, and the clamping jaws abut against the clamping parts during movement. The clamping jaws and the limiting grooves increase the supporting force between the two joints, the reliability between the two joints is improved during bending, and therefore the effect of increasing the bending strength of the bent pipe is achieved, and the bent pipe is not prone to being broken off. And the limiting pieces are used for limiting on the two sides of the rotating piece, circumferential torsion of the two joints is reduced, circumferential torsion of the bent pipe is avoided, and the torsion resistance of the bent pipe is improved.

This application relates to a metal-based carbon fiber composite material, its preparation method, and metal-based carbon fiber products. The preparation method includes: mixing chromium powder, titanium powder, tungsten powder, nickel powder, carbon fiber, and a binder, and then pressing the mixture to prepare a metal-based carbon fiber composite green body; sintering the metal-based carbon fiber composite green body to prepare a matrix; and depositing carbon on the surface of the matrix using chemical vapor deposition to prepare the metal-based carbon fiber composite material. After sintering, the chromium powder, titanium powder, tungsten powder, nickel powder, and carbon fiber produce chromium carbide, titanium carbide, tungsten carbide, and nickel carbide. The chromium powder, titanium powder, tungsten powder, and nickel powder undergo a solid solution reaction to form a carbide alloy, and the carbides and carbide alloys intertwine. Further carbon deposition on the surface of the matrix using chemical vapor deposition is then performed. The interaction of these steps simultaneously improves the compressive strength, flexural strength, and Vickers hardness of the metal-based carbon fiber composite material.

The invention discloses a thermal insulation material for ultralow-energy-consumption system doors and windows and a preparation method of the thermal insulation material, and relates to the technical field of high polymer materials. The heat insulation material for the door and window of the ultra-low energy consumption system at least comprises the following raw materials in parts by mass: 55-65 parts of PA66 resin; 8 to 15 parts of thermoplastic polyurethane and 5 to 10 parts of polyamide-imide; 18 to 25 parts of activated chopped glass fiber; 3-6 parts of modified nano silicon dioxide coated aerogel microbead heat insulation filler; 2 to 5 parts of a diethyl aluminum phosphinate flame retardant coated with melamine cyanurate; 1-3 parts of a microcapsule expanded graphite flame retardant; 0.3 to 0.8 part of an antioxidant; 0.2 to 0.5 part of a light stabilizer; and 0.5-1 part of a lubricant. The thermal insulation material prepared by the invention has the advantages of ultralow thermal conductivity, efficient flame retardance, low smoke, no toxicity, high dimensional stability and excellent mechanical properties.

This invention relates to the field of metallic materials technology, specifically disclosing a lightweight, high-strength seamless steel pipe for fitness equipment and its manufacturing process. The manufacturing process for the lightweight, high-strength seamless steel pipe for fitness equipment includes the following steps: 1. Normalizing a high-strength low-alloy steel pipe to obtain a pre-treated steel pipe; 2. Polishing the surface of the pre-treated steel pipe to obtain a polished steel pipe; 3. Spraying a protective liquid onto the surface of the polished steel pipe and drying it to obtain a pre-protected steel pipe; 4. Heating the pre-protected steel pipe to 100-105℃, holding it at that temperature for 20-30 minutes, and allowing it to cool naturally to obtain the lightweight, high-strength seamless steel pipe for fitness equipment. The protective liquid includes: solvent, water-based acrylic resin, film-forming aid, filler, coupling agent, processing aid, and modifier; the modifier is a compound of guar gum, guar gum, and jujube gum. This invention has the advantage of further improving the corrosion resistance of the lightweight, high-strength seamless steel pipe.

The application belongs to the field of thin ceramic production and specifically discloses a kind of thin ceramic and its firing process, the thin ceramic is made of the following weight parts of raw materials;a. blank: kaolin 100 parts, mullite 30-50 parts, manganese dolomite 20-30 parts, silicon dioxide 15-25 parts, calcium oxide 10-20 parts, zinc oxide 8-16 parts, zirconium dioxide 5-10 parts, gallium oxide 3-6 parts;b. glaze: bauxite, 10-20 parts, barium carbonate 8-15 parts, tin oxide, 5-10 parts lanthanum oxide 4-8 parts, yttrium oxide, 3-6 parts. The raw materials of the thin ceramic are easy to obtain, the preparation method is simple, the wall is thin, the hardness is high, and the impact resistance is good.

This invention relates to a heat transfer protective film for metal corrosion protection, comprising a heat-resistant layer coated on one side of a base film, and an adsorption layer, a strong anode layer, and a weak anode layer sequentially coated on the other side of the base film. Sacrificial anode cathodic protection is an effective method for metal corrosion protection, while heat transfer technology transfers graphic coded information onto a substrate using a heat transfer printer or similar method. Because the coating can be prepared in advance, it can form heat transfer protective films with multiple functions. By preparing an anode coating containing an active metal, coating it as a heat transfer protective film, and then transferring it onto a metal substrate, the sacrificial anode material protects the cathode metal while imparting graphic coded information to the metal substrate. This represents a new metal corrosion protection mode that adapts to the development of the information age.