87results about How to "No crack" patented technology

The utility model discloses a kind of light-weight motor mounting bracket, it is related to motor bracket production appliance technical field, including installation base, installation base top one end is welded with mounting plate, mounting plate bottom side is welded with the reinforcing rib for strengthening fixed, reinforcing rib bottom is welded on installation base, mounting plate top is fixedly connected with connecting block, connecting block is opened with the fixed hole for connecting external equipment, mounting plate is opened with the heat dissipation hole for ventilation, the utility model is set through connecting block, can ensure the reliable connection of bracket and external equipment, optimize the transmission path of force, reduce stress concentration;Through the setting of expansion bolt, the quick, accurate installation of bracket can be realized, the firmness of guarantee installation;Through the setting of reinforcing rib, it can be ensured that the connecting part of mounting plate and installation base does not crack or deform when motor high-speed operation or load changes, solve the structural damage problem caused by insufficient strength of connecting part of traditional bracket.

This invention discloses a method for preparing high-elongation bars for cold forging, belonging to the field of aluminum alloy preparation technology. Through optimization of composition and process, the prepared bars possess high purity, uniform and fine equiaxed grain structure, and excellent plasticity, with significantly improved elongation. This meets the stringent requirements of cold forging for high material plasticity, resulting in a bright, crack-free surface and uniform grains after cold forging, overcoming problems such as oxide scale, coarse grains, and poor dimensional accuracy caused by hot forging. Furthermore, the introduction of modified talc and sodium nitrate as refining agents further promotes uniform microstructure, achieving high elongation and excellent cold forging performance.

This invention discloses a hot-rolled steel sheet for vacuum train tubes that exhibits excellent yield strength, weldability, low-temperature toughness of the welded portion, vibration damping ratio, and is free from hot cracking. The hot-rolled steel sheet according to this invention is characterized in that its alloy composition, by weight percent, comprises: C: less than 0.06% (more than 0%), Si: 0.5-1.5%, Mn: 1.2-2.2%, Cu: 0.5-1.5%, Ni: more than 0.25%, Ti+Nb+V: less than 0.02% (inclusive of 0%), the balance being Fe and unavoidable impurities.

The invention discloses a lithium manganate positive electrode material, a preparation method and an applied lead-lithium battery, relates to the technical field of lithium manganate positive electrode materials, and solves the problems that the existing lithium manganate positive electrode material is poor in structure and interface stability and poor in rate and cycle performance. The positive electrode material is composed of a lithium manganate matrix and a double-layer composite coating, the matrix is prepared by taking lithium carbonate and manganous-manganic oxide as raw materials and doping magnesium hydroxide, aluminum hydroxide and titanium dioxide multi-plasma phase; the lithium manganate positive electrode material is prepared by uniformly compounding a lithium manganate matrix modified by a spinel inner layer, vinyl functionalized MOF and a polyvinylidene fluoride-hexafluoropropylene copolymer on the surface of an aluminum foil receiver through an electrospinning-electrospray synergistic process. The material is applied to the lead-lithium battery, shows excellent electrochemical performance and has good practical application value.

The invention discloses a carbon foam / paraffin composite phase-change material for thermal management of a lithium ion battery and a preparation method and application of the carbon foam / paraffin composite phase-change material. Low-cost commercial melamine foam is used as a template to prepare carbon foam, and the carbon foam and paraffin are compounded through a vacuum impregnation process to obtain the carbon foam / paraffin composite phase-change material; wherein the carbon foam is prepared by heating and carbonizing melamine foam in a stepped manner under the protection of nitrogen, and the compounding of the paraffin and the carbon foam is realized by adopting vacuum impregnation. The problems that a traditional pure paraffin phase-change material is low in heat conductivity and prone to deformation and leakage, and a metal-based composite phase-change material is high in cost, large in density and prone to corrosion are solved, the prepared foamy carbon / paraffin composite phase-change material is low in density and cost, the heat conductivity is remarkably improved compared with that of pure paraffin, and the thermal stability is excellent within the working temperature range of a lithium ion battery. When the lithium ion battery is applied to thermal management of the lithium ion battery, the lithium ion battery can be maintained for a long time in a phase change temperature range, and an economical and efficient solution is provided for thermal management of batteries of electric vehicles and energy storage equipment.

The application discloses a low-cost high-entropy alloy and a coating preparation method for marine engineering equipment, designs a Co high-entropy alloy system without noble metals, and a specific expression is FeCrNiCu 0.5‑y Mo x Si y , wherein x is in a range of 0.2-1, and y is in a range of 0-0.5.The coating prepared by the application has the advantages of good friction and wear resistance and corrosion resistance, is composed of face-centered cubic structure (FCC), body-centered cubic structure (BCC) and ordered phases thereof, can produce good metallurgical bonding with a base body, and has no obvious defects such as pores and cracks.

This invention belongs to the field of semiconductor materials technology and discloses a method for preparing transferable layered bismuth oxide selenide semiconductor thin films by heterolayer interface control. The method includes: 1) activating and growing a substrate; 2) depositing an interface-controlled heterolayer, which is a two-dimensional material or a water-soluble oxide; 3) CVD growing a Bi₂O₂Se thin film on the heterolayer; and 4) using a polymer support film to assist wet peeling, separating the film from the substrate and transferring it to a target substrate. This invention solves the problem of non-destructive transfer due to excessively strong adhesion between the film and substrate by introducing a heterolayer with weak interfacial interactions, and is applicable to fields such as flexible electronics and silicon-based integration.

The application provides a wear-resistant composite piercing mill head manufacturing method and a piercing mill head, and the manufacturing method comprises the following steps: S1, preparing a steel base head; S2, adopting a submerged-arc welding process to make a flux-cored wire cladded on a working cone surface and a nose end surface of the steel base head, so as to form a cladding layer with a thickness of 6-8 mm; and S3, pre-oxidizing the cladding layer of the steel base head at high temperature, so that the wear-resistant composite piercing mill head is obtained. The wear-resistant composite piercing mill head manufacturing method has a dense and uniform oxide film on the surface of the cladding layer of the piercing mill head, the oxide film is firmly combined with the cladding layer, and the existence of the dense and uniform oxide film can reduce the power consumption of a steel pipe piercing mill and prolong the service life of the piercing mill head.

This invention discloses a gas diffusion layer with multi-level mass transfer channels, its preparation method, and its application. The gas diffusion layer with multi-level mass transfer channels includes a substrate layer and a microporous layer on the substrate layer; wherein the microporous layer comprises carbon black, hollow porous carbon nanofibers, and optionally a hydrophobic binder. This invention uses hollow porous carbon nanofibers as a novel MPL carbon material to synergistically construct a gas diffusion layer with better water vapor management capabilities in conjunction with carbon black particles. The resulting gas diffusion layer exhibits excellent comprehensive performance; its hollow porous structure provides additional water transport channels, improving water vapor transport capacity, thereby enabling the assembled membrane electrode to have better output performance.

A micro-arc oxidation treatment method for a magnesium alloy containing an LPSO phase, which adopts an electrolyte system mixed with three kinds of salts, i.e., a metallate, a silicate and a phosphate, and combines two-step micro-arc oxidation treatment to control the generation of ceramic phases in the oxide film layer structure and embed a large number of exposed LPSO phases in the micro-arc oxidation film, so that the obtained micro-arc oxidation film has small porosity and pore size, a smooth surface and no micro-cracks, the porosity is less than or equal to 9%, the micro-arc oxidation film has a pore size of 140-1100 nm and an average pore size of less than or equal to 1 micrometer, and the corrosion resistance of the magnesium alloy is significantly improved, the self-corrosion current density of the magnesium alloy is reduced by three orders of magnitude compared with that before the micro-arc oxidation treatment, the self-corrosion current density is less than or equal to 3.588*10 ‑8 A cm ‑2 , and the corrosion resistance efficiency is greater than or equal to 1208%.

The invention discloses a copper-based powder metallurgy friction material containing composite iron powder and a preparation method of the copper-based powder metallurgy friction material. The friction material is prepared from, by weight, 45%-60% of electrolytic copper powder, 10%-20% of the composite iron powder, 10%-15% of granular graphite, 1%-5% of barite, 3%-6% of tungsten oxide, 2%-4% of high-carbon ferrochrome, 2%-4% of silicon dioxide and 1%-2% of porous zirconium carbide ceramic. Compared with the prior art, the friction material has the positive effects that the iron powder prepared by two different processes is added into the friction material, and optimal granularity matching is carried out, so that the strength and the hardness of the material are improved, and meanwhile, the noise generated in the braking process is effectively reduced. According to the invention, the porous zirconium carbide ceramic is added into the friction material, so that the heat resistance of a brake pad can be improved, the stability of a friction coefficient is ensured, and vibration and noise during braking are reduced.

This invention discloses a 6-series energy-absorbing aluminum alloy and its manufacturing method. The aluminum alloy, by mass percentage, comprises: Mg: 0.50–1.20%, Si: 0.40–1.00%, Mn: 0.15–0.95%, Cr: 0–0.25%, Fe: 0.15–0.45%, Ti: 0.015–0.30%, and Cu: 0.10–0.70%; wherein the Mg / Si mass ratio is ≥0.85 / 1, and the total content of Mn+Cr+Fe is ≤1.2%; it also includes an AlTi5C0.25 grain refiner and impurities with a content not exceeding 0.15%, with the balance being Al. This invention optimizes and precisely designs the content of the main alloying elements in the alloy, and introduces TiC nanoparticles using the AlTi5C0.25 grain refiner, enabling the aluminum alloy profile to possess both high strength and excellent crushability.

The application discloses a kind of special fluorosilicone modified acrylic coatings of anti-fouling and anti-aging unique framework and a preparation method thereof, for the defects of traditional fluorosilicone modified acrylic coatings, such as single molecular framework, difficult to consider anti-fouling and anti-aging performance, poor synergistic effect, etc., by designing the unique three-dimensional molecular framework of "acrylic main chain-fluorosilicone branch-crosslinking framework", optimizing the formula, and using efficient controllable polymerization process, the special fluorosilicone modified acrylic coatings of anti-fouling and anti-aging unique framework is prepared.The formula includes 48-68 parts of unique framework fluorosilicone modified acrylic copolymer, 19-29 parts of anti-fouling and anti-aging pigment and filler and other environmentally friendly components, realizes the synergistic effect of fluorosilicone and the double improvement of anti-fouling and anti-aging, has excellent performance such as surface energy ≤26 mN / m, VOC ≤40 g / L, artificial accelerated aging ≥2000 h, outdoor service life ≥20 years, is convenient to operate and controllable in cost, is suitable for high-end outdoor special coating scenes such as building exterior wall and high-end venue, and can widely replace traditional outdoor coatings.

This application provides a gradient-doped ferroelectric thin film device and its fabrication method, relating to the field of optoelectronic device technology. The gradient-doped ferroelectric thin film device comprises, from bottom to top, a substrate, a buried oxide layer, a buffer layer, and a ferroelectric thin film material layer; the ferroelectric thin film material layer is doped with impurity ions, with the doping concentration of the impurity ions increasing sequentially from bottom to top. This application, by employing a bottom-up incremental gradient doping design, optimizes the interface defects and internal stress of the ferroelectric thin film, overcomes the problem of lattice mismatch between ordinary ferroelectric thin films and the substrate layer, achieves improved crystal quality and enhanced electro-optic coefficient, and effectively improves the electro-optic effect.

The present application relates to a kind of antibacterial and anti-adhesion catheter based on intelligent response nanofiber membrane, which is composed of medical polymer catheter substrate, silane coupling agent transition layer grafted on the outer surface of the substrate and nanofunctional fiber membrane layer formed on the outer surface of the transition layer by electrospinning process, the nanofunctional fiber membrane layer is composed of polyvinyl alcohol loaded hyaluronic acid grafted copper-doped carbon dots (CCDH), CCDH takes copper-doped carbon dots as core, and forms core-shell structure by grafting hyaluronic acid on the surface. The present application solves the problem of easy peeling of catheter coating by chemical bonding, and the formed antibacterial and anti-adhesion catheter has very low water contact angle and friction coefficient, not only effectively blocks the initial adhesion of bacteria at the physical level by constructing hydration layer, but also releases copper ions and carbon dots by enzymatic hydrolysis of hyaluronic acid under bacterial infection microenvironment, induces the production of reactive oxygen species to kill bacteria efficiently, and has broad application prospect in reducing the risk of catheter-related urinary tract infection.

This invention discloses a radial forging method for Ni30 alloy ultra-long products, relating to the field of metal forging technology. The radial forging steps are as follows: S1: First, heat the intermediate billet to a holding temperature. After holding for T1 time, remove the intermediate billet; S2: Cover both ends of the intermediate billet with insulating material, then place the intermediate billet back into the furnace for a second holding time (T2 time). After the second holding time, the insulating material forms an insulating layer at both ends of the intermediate billet. The thermal conductivity of the insulating layer is lower than that of the intermediate billet, thus obtaining the billet to be forged; S3: Clamp the insulating layer at both ends of the billet to be forged using the jaws of a radial forging machine, and then perform open forging to obtain the finished ultra-long billet. This invention, by using a soft-wrapping technology at both ends of the intermediate billet, avoids direct contact between the jaws of the radial forging machine and the intermediate billet, reducing the heat transfer rate and allowing the temperature at both ends of the billet to be maintained above 900℃ for a longer period, achieving continuous deformation without cracking.

The application discloses a kind of high weather-proof outer wall special-purpose inorganic stone gel and its preparation process and a kind of inorganic stone preparation process, the inorganic stone gel includes the following weight parts components: geopolymer precursor 35-50 parts;Sulfoaluminate clinker 25-45 parts;Alkali activator 15-17 parts;Nano titanium dioxide 1-4 parts;Hollow glass bead 2-8 parts;Basalt-PVA composite fiber 1.3-1.9 parts;Anti-alkali bleeding stabilizer 0.25-0.8 parts.The beneficial effects of the application are: carbonization resistance, yellowing resistance, long-term ultraviolet aging resistance, low water absorption, excellent impermeability, excellent freeze-thaw resistance, crack resistance and impact resistance, long weathering life, suitable for all scenarios, suitable for industrial production.

This invention relates to the field of electronic paste preparation technology, and discloses a low sheet resistance tungsten-copper electronic paste and its preparation method, comprising the following steps: Step 1, preparing tungsten-copper composite powder: spherical tungsten powder with a diameter of 1-10 μm and copper powder with a size of 1-3 μm are mixed by mechanical mixing, with a tungsten to copper weight ratio of 3:1-6:1. Before mixing, the copper powder needs to undergo graphene coating pretreatment; Step 2, preparing an inorganic binder: the inorganic binder includes, but is not limited to, the following components: glass powder, CuO, TiO2, La2O3, Pu6O11; Step 3, preparing an organic carrier: the organic carrier includes a solvent, an organic binder, and a thickener; Step 4, preparing the tungsten-copper paste. The tungsten-copper paste of this invention has widely available raw materials, a simple preparation process, and is suitable for mass production. Although graphene, a high-priced material, is added, the amount added is small and the performance is particularly excellent, making the cost of the tungsten-copper paste of this invention far lower than that of similar foreign products, resulting in a very high cost-performance ratio.

This application relates to a spraying process for a highly corrosion- and wear-resistant yttrium oxide composite coating, aiming to solve the problems of high porosity, poor high-temperature stability, and insufficient wear resistance of existing yttrium oxide coatings. The process includes degreasing and cleaning, pure water immersion, sandblasting roughening, steam and water rinsing, ultrasonic cleaning, pre-drying, plasma spraying, orthogonal experimental parameter optimization, deep ultrasonic cleaning, and final drying and curing. A yttrium oxide and zirconium oxide composite powder is used to form a dense coating under optimized plasma spraying parameters, and high cleanliness is ensured through multi-stage cleaning and clean environment control. Through the above technical solution, this application significantly improves the coating's density, chemical stability, wear resistance, and thermal shock resistance, effectively blocks the penetration of corrosive media, reduces particulate contamination, and meets the stringent requirements of semiconductor etching equipment for long-lasting protective coatings.

The invention discloses a preparation method and application of a rare earth magnesium alloy surface micro-arc oxidation film layer manufactured through electric arc additive manufacturing, and relates to the technical field of additive manufacturing light metal surface treatment. The preparation method comprises the following steps: manufacturing a rare earth magnesium alloy through electric arc additive manufacturing; carrying out homogenizing heat treatment on the rare earth magnesium alloy subjected to electric arc additive manufacturing; performing earlier-stage treatment; preparing an inner-layer alkaline electrolyte and an outer-layer alkaline electrolyte; and step-type voltage micro-arc oxidation treatment: taking stainless steel as a cathode, taking the magnesium alloy as an anode, sequentially putting the stainless steel and the magnesium alloy into the inner-layer alkaline electrolyte and the outer-layer alkaline electrolyte for micro-arc oxidation, cleaning and drying to obtain a micro-arc oxidation film layer on the surface of the magnesium alloy. According to the preparation method, the problems that a traditional micro-arc oxidation coating is loose, porous, prone to corrosion and short in service life are solved, the corrosion resistance of the magnesium alloy is effectively improved, the magnesium alloy is prevented from volatilizing under the high-temperature condition, the working requirement of a satellite support in the space environment is met, and the application range of the magnesium alloy is widened.

The utility model discloses a model bracket for ship design, including multi -angle fastening adsorption subassembly, multi -angle fastening adsorption subassembly includes strip -shaped groove, circular receiving groove, sphere, receiving cylinder, cylindrical groove, cylinder rod and sucking disc, the strip -shaped groove and circular receiving groove are set up on the bracket main part, the sphere is movably connected in the strip -shaped groove and circular receiving groove, the receiving cylinder is fixedly connected on the sphere middle part, the cylindrical groove is set up in the receiving cylinder, the cylinder rod is movably connected in the cylindrical groove, the sucking disc is fixedly connected on the cylinder rod top. The utility model ball can make the sucking disc with the ship model surface form adaptive tilt in the rotation of circular receiving groove, ensure that sucking disc overall even stick together, eliminate the edge " line contact " stress concentration problem caused by traditional rigid connection, protect the ship model surface made of brittle material such as resin, ABS and do not produce indentation or crack, can further avoid the phenomenon of stress damage of ship model.

The application discloses a method for electron beam fuse additive manufacturing of beta titanium alloy components, and belongs to the technical field of additive manufacturing. The application aims to solve the problems of long preparation period, low efficiency, low utilization rate, serious oxidation, significant beta spot and poor strength and toughness of the prior art. The method comprises the following steps: pretreating the printing wire and the substrate; establishing a three-dimensional entity model based on the target beta titanium alloy component, performing slice processing on the three-dimensional entity model to generate multi-layer two-dimensional slice data, and then importing the slice data into an electron beam fuse additive manufacturing equipment, and setting a scanning path, preheating parameters and printing process parameters; starting the equipment and performing vacuumization, printing the beta titanium alloy according to the set printing parameters and procedures, completing all layers, and obtaining the beta titanium alloy component. The beta titanium alloy component prepared by the application has high density, and provides a reliable technical approach for the preparation of high-performance beta titanium alloy components in the fields of aviation and aerospace.

The present application relates to a kind of anticorrosive thermal insulation powder coating and thermal insulation pipeline, belong to the technical field of coating.A kind of anticorrosive thermal insulation powder coating, including primer, intermediate layer coating and surface layer coating;Primer includes the following raw materials: bisphenol A type epoxy resin, curing agent, accelerator, thermoplastic elastomer, silicone resin, coupling agent, filler, leveling agent, defoaming agent;Intermediate layer coating includes the raw material: maleic anhydride grafted polypropylene resin, aerogel powder, hollow ceramic microsphere, foaming agent, thermoplastic elastomer, silicone resin, antioxidant;Surface layer coating includes the following raw materials: polyvinylidene chloride resin, heat stabilizer, maleic anhydride grafted polypropylene resin, pigment and filler, antioxidant.The problem of penetration accelerated corrosion of the inner wall of thermal insulation pipe when conveying high-temperature water is solved in the form of three-layer structure.

This invention discloses a low-carbon equivalent, high-toughness, ultra-high-strength marine engineering steel, FH550, and its production method, belonging to the field of metallic materials technology. The chemical composition of this steel, by mass percentage, is: C: 0.06~0.12%, Si: 0.20~0.40%, Mn: 1.30~1.70%, P≤0.015%, S≤0.003%, Al: 0.02~0.05%, Nb: 0.030~0.06%, V: 0.010~0.040%, Ti: 0.010~0.025%, Cr: 0.10~0.30%, B: ≤0.0005%, with the balance being Fe and impurities, and a carbon equivalent (Ceq) ≤0.44%. The production method includes: hot metal pretreatment → BOF smelting → LF refining → RH vacuum treatment → thick slab continuous casting → slow cooling with cover → billet heating → two-stage rolling → accelerated cooling → flaw detection → inspection. The two-stage rolling adopts a strong reduction process, and accelerated cooling after rolling replaces the quenching and tempering treatment. The FH550 steel plate of this invention has a yield strength ≥550MPa, an average KV2 impact energy ≥260J at -60℃, and combines ultra-high strength, low-temperature high toughness, and excellent weldability. The production process is simple, has a short cycle, and low cost, and can be widely used in deep-sea marine engineering, bridges, and other fields.

This invention relates to the field of carbon fiber sizing agents, specifically to carbon fiber sizing agents, their preparation methods, and applications. The carbon fiber sizing agent comprises the following components in parts by weight: 100 parts sulfonated polyether ether ketone (PEEK), 1-5 parts aminated carbon nanotubes, 0.5-2 parts catalyst, and 2-6 parts condensing agent. The carbon fiber sizing agent provided by this invention exhibits uniform dispersion, long-term storage stability, and excellent film-forming properties. The carbon fiber-PEEK resin composite material prepared using this carbon fiber sizing agent demonstrates excellent interfacial bonding strength and significantly improved mechanical properties.

The utility model belongs to the field of leather shoes, in particular to a pair of locking anti-skidding wear-resistant leather shoes, which is used for solving the problems that the traditional leather shoes are inconvenient to put on and take off, the anti-skidding performance is insufficient, the heels cannot be independently replaced and the heels are easily rubbed, the leather shoes comprise soles, the heels and vamps, and the heels are detachably connected with the soles through stainless steel fixing screws. The bottom surfaces of the sole and the heel are respectively provided with a plurality of groups of anti-skid grooves which are distributed in a staggered manner, the vamp is provided with strip-shaped holes so as to improve the wearing and taking-off convenience, a detachable insole with an anti-abrasion pad is arranged in the shoe, the sole is made of blended rubber added with anti-abrasion particles, and the heel is made of a high-hardness TPU material and is sprayed with a ceramic coating. The walking safety is improved through the staggered anti-skid structures, the use cost is reduced through the detachable heels, the wearing comfort is improved through the elastic openings and the anti-abrasion pad structures, and the anti-skid shoes are suitable for daily walking and various ground environments.

The application relates to the technical field of crystallizers, and discloses a manufacturing process of an ultra-large-specification crystallizer copper pipe, a semi-continuous casting machine set, an oil press machine set, an extruding machine set, a curve type box type heating furnace set and a high-precision Fanuc gantry five-axis machining center set, which are used for continuously casting the copper pipe group, extruding the copper pipe group, twice extruding the copper pipe group, heating and cooling the copper pipe group and machining the copper pipe group. The manufacturing process of the ultra-large-specification crystallizer copper pipe reduces the problems such as shrinkage and shrinkage hole of the copper pipe group, rapidly reversely extrudes the copper pipe group, ensures that the copper pipe group is free of cracks, the grain structure is uniform, the surface hardness is high, residual internal stress is eliminated during the copper pipe group machining process, the machining precision is improved, the electroplating precision and capacity of the copper pipe group through the ultra-large automatic electroplating tank are improved, the electroplating requirements of the copper pipe group are ensured, thus avoiding the influence of bubbles on the electroplating effect of the copper pipe group and improving the finished product quality of the copper pipe group.

The invention belongs to the technical field of laser cladding, provides a graphite rod ceramic coating for epitaxial support of a semiconductor wafer and a laser cladding preparation method of the graphite rod ceramic coating, and is used for solving the problems of low bonding strength, low density and the like of a ceramic layer on the surface of an existing graphite substrate. The graphite rod ceramic coating for epitaxial supporting of the semiconductor wafer comprises a graphite substrate, and a transition layer, a ceramic middle layer and a ceramic functional surface layer are sequentially arranged on the outer side of the graphite substrate. According to the method, the bonding strength between the ceramic coating and the graphite rod substrate can be improved, meanwhile, the problems of pores, cracks and the like of the ceramic coating are effectively solved, the density of the ceramic coating is finally improved, the high insulation, high wear resistance and high cleanliness of the ceramic coating are improved, and the method is suitable for high-end semiconductor manufacturing.

The invention belongs to the technical field of oil paints, and discloses an anti-aging and anti-cracking water-based oil paint, which is prepared from the following components in parts by mass: 15 to 30 parts of pigment, 15 to 25 parts of modified linseed oil, 30 to 55 parts of acrylic resin emulsion, 0.5 to 1 part of PH regulator, 0.5 to 1.5 parts of thickening agent, 1 to 3 parts of nano filler, 0.2 to 0.6 part of anti-aging agent, 0.1 to 0.3 part of preservative and 10 to 20 parts of water. The modified linseed oil is formed by carrying out graft modification on linseed oil and an acrylate monomer; the acrylic resin emulsion is a specific monomer copolymer. Through the synergistic compatibility of the acrylate modified linseed oil and the acrylic resin emulsion, and in combination with the nano filler and the composite anti-aging agent system, the pigment film has good flexibility, uniform film-forming property and structural stability under a thick coating condition, meanwhile, the oxidation resistance and yellowing resistance are improved, and the generation of cracks is effectively inhibited. The oil paint has both aging resistance and cracking resistance.

The invention belongs to the technical field of diamond film preparation, and relates to a simple large-size high-quality self-supporting diamond thick film preparation method, which comprises the following steps: surface pretreatment: grinding a large-size molybdenum block by using diamond micro powder to remove surface impurities, and then carrying out plasma treatment on the surface of the large-size molybdenum block by using CVD (Chemical Vapor Deposition) equipment; carrying out CVD growth; after part of the CVD growth steps are repeated according to the required polycrystalline film thickness, under the conditions that the temperature is 850-950 DEG C, the hydrogen is 5-8 slm, and the pressure is 4.5-5.5 kpa, methane accounting for 2-3 vol% of the mixed gas is started, a nanocrystalline layer with the thickness being 0.3-1 mm grows through CVD equipment, and therefore the high-quality diamond film is prepared. The preparation method disclosed by the invention is simple and convenient, can be repeatedly used for multiple times, can reduce the use cost of the substrate in the later period, realizes high whole film rate and low thermal shock stress of the self-supporting thick film, and not only improves the quality of the diamond film.