21results about How to "Excellent surface hardness" patented technology

The utility model discloses a track inspection robot which comprises a track and an inspection robot body, the top of the inspection robot body is fixedly connected with a frame, a walking mechanism is arranged in the frame, an electric telescopic rod is fixedly connected in the inspection robot body, and the output end of the electric telescopic rod is fixedly connected with a holder. The bottom of the cradle head is fixedly connected with a bidirectional motor, one side of the cradle head is fixedly connected with an infrared thermal imager, the lifting type track inspection robot is provided with a special robot track, the track is a high-strength aluminum alloy profile track, the sectional size of the track is small, the overall installation size requirement space is small, and engineering construction is convenient. And meanwhile, the track has excellent surface corrosion resistance and surface hardness, so that the wear resistance is improved on the premise that the smooth passing of the robot is met, and the inconvenience caused by ground movement can be solved by the lifting type track inspection robot.

The invention discloses a modification method for improving corrosion resistance of a chromium-nickel cladding coating, which comprises the following steps: preparing cladding powder according to a mass ratio, cleaning the surface of a workpiece to be plated, and preparing the chromium-nickel corrosion-resistant coating through plasma cladding, wherein the solid-phase cladding powder comprises the following components in percentage by mass: 50 to 80 percent of Cr, 15 to 45 percent of Ni, 0 to 5 percent of Hf, 0 to 5 percent of NH4Cl and 2 to 5 percent of La2O3. According to the modification method for improving the corrosion resistance of the chromium-nickel cladding coating, a prepared infiltrated layer is uniform in organization structure, moderate in thickness, sufficient in Cr atom diffusion, good in metallurgical bonding with a base body, not prone to falling off and suitable for austenitic steel and high-temperature alloy parts used for workpieces with the large length-diameter ratio and various complex shapes such as large boilers and oil and gas field conveying pipelines; and the method has excellent industrial batch production benefits.

The invention relates to a screw assembly and a manufacturing method, the screw assembly comprises a first screw head and a first screw rod, a first external thread is arranged outside the first screw rod, a tapping groove is formed in the first screw rod, and an internal thread is arranged in the circumferential direction of the tapping groove; the second screw comprises a second screw head and a second screw rod, a second external thread is arranged outside the second screw rod, the second screw rod is inserted into the tapping groove of the first screw rod, and the second external thread is matched with the internal thread; the second screw head and the second external thread are both made of nylon materials. The screw assembly is compact in structure, in the process of fixing through the screw assembly, the second screw head is attached to the surface of a fixed object, and the second screw head made of nylon effectively prevents the surface of the fixed object from being knocked and depainted and plays a role in protecting the surface of the fixed object, so that the requirements of users are better met.

This invention discloses a SiC with an ultra-high temperature ceramic gradient coating. f / SiC composite materials, their preparation methods, and applications. A double-layer glow discharge plasma surface metallurgical method is used to prepare SiC composite materials. f A (Hf,Si,Ta)C gradient composite coating was prepared on the surface of the SiC composite material. This coating was able to resist SiC in an oxygen atmosphere at 1773 K. f Effective protection of SiC composite materials. The specific advantages of this invention are: (1) Ion bombardment of the substrate significantly improves the point defects and conductivity of the composite substrate; (2) The (Hf,Si,Ta)C coating has a continuous gradient structure, forming a good metallurgical bond between the coating and the substrate, with high bonding strength; (3) The similar thermal expansion coefficients of the (Hf,Si,Ta)C coating and the substrate can improve the thermal mismatch between the coating and the substrate, reducing the tendency for coating peeling and cracking during service; (4) The (Hf,Si,Ta)C coating system has a high service temperature and self-healing ability. The coating prepared by this invention has excellent high-temperature protection performance, improving the protection of SiC. f The high-temperature service life of SiC composite materials has broad application prospects in the aerospace field.

The present invention relates to a thermoplastic resin composition, a method for preparing the same and a molded product including the same. More specifically, the present invention relates to a thermoplastic resin composition, a method for preparing the thermoplastic resin composition and a molded product including the thermoplastic resin composition, comprising 35% to 85% by weight of an alkyl acrylate-aromatic vinyl compound-vinyl cyanide graft copolymer (A) and 15% to 65% by weight of a polymethacrylate resin (B), wherein the graft copolymer (A) contains an alkyl acrylate rubber having an average particle size of 50nm to 120nm, wherein the alkyl acrylate coverage value (X) calculated by equation 1 of the thermoplastic resin composition is 70% or more. According to the present invention, the present invention has the following effects: providing a thermoplastic resin composition, a method for preparing the thermoplastic resin composition and a molded product including the thermoplastic resin composition, the thermoplastic resin composition having excellent mechanical properties such as impact strength, tensile strength and flexural strength, surface hardness, transparency and colorability, and being able to prevent whitening during bending due to excellent non-whitening properties.

The present invention relates to the technical field of scrap steel recycling and treatment, specifically a method for recycling scrap steel to prepare high-strength ductile iron material, including the following processes: adding scrap steel and a carburizer into a furnace, heating and smelting; adding ferrosilicon and copper to form raw iron water; adding a spheroidizing agent to the bottom of a spheroidizing bag, covering a primary inoculant on the spheroidizing agent, flowing the raw iron water in, controlling the temperature at 1430-1460°C, and performing inoculation in the mold while spheroidizing; pouring out of the furnace, adding a stream inoculant, and performing stream inoculation; heat treatment to obtain ductile iron. The present invention introduces a trace amount of nitrogen into cast iron to exert a microalloying effect, play a role in solid solution strengthening, stabilize austenite, promote the formation, stabilization, refinement and reduction of spacing of pearlite; and inhibit the formation of cementite and the diffusion of carbon atoms to graphite, hinder the growth of graphite, help graphite spheroidization and size refinement, and further improve the performance of ductile iron.

The application discloses an artificial blood vessel joint and a preparation method thereof. The blood vessel joint adopts a carbon-based material as a base body, a double-layer composite coating with PyC and Ag-doped DLC and an Ag-doped DLC coating are prepared on the inner wall and the outer wall respectively, and the blood vessel joint is obtained; the inner wall of the blood vessel joint is smooth and compact, which is beneficial to blood circulation; the outer wall is a porous Ag-doped DLC coating, which is beneficial to biological fixation with tissues; the Ag-doped DLC coating endows the blood vessel joint with good antibacterial property, reduces inflammation, and can improve the adverse reaction of the human body caused by friction and powder loss after the blood vessel joint is implanted into the human body.

Examples of the present invention provide multilayer sheets, multilayer electronic devices, etc. The multilayer sheet includes: a transparent film having a total light transmittance of 85% or more according to ISO 13468; a coating disposed on one side of the transparent film; and an adhesive layer disposed on the other side of the transparent film; the thickness of the adhesive layer after curing is less than twice the thickness of the coating. The multilayer sheets and multilayer electronic devices of the present invention do not peel off from the substrate even during repeated folding or rolling, and due to their excellent surface hardness, they exhibit excellent scratch resistance, dent resistance, etc. The multilayer sheets can be used as cover sheets for displays and offer excellent utilization for multilayer electronic devices.

The invention relates to a granulation process of large granular urea for coating. The preparation method comprises the following steps: taking screened granular urea as a granulation master batch, putting the master batch into a disc granulator, rotating a disc, spraying a urea formaldehyde solution as a granulation binder, and uniformly dispersing; the preparation method comprises the following steps: spraying a binder on a disc, simultaneously crushing small-particle urea to 10-80 meshes, uniformly scattering the crushed small-particle urea on the granulation master batch sprayed with the binder, rotating the disc for 1-3 minutes, completely wrapping the urea powder on the master batch, continuously spraying the binder and the urea powder, circulating for 4-15 times until the particle size is 3-4.75 mm, and introducing hot air for preliminary drying and preheating for 5-10 minutes. According to the invention, the granulation production cost is obviously reduced, the balling efficiency is improved, and the method is suitable for industrial production; the agglomeration powder coating granulation mode can reduce energy and time required by cooling, the large-particle urea prepared by the process is uniform and round in particle size, smooth in surface and high in particle strength, a coating material is easy to coat on the surface, the coating quality is improved, and the large-particle urea has great industrialization value.

The invention relates to the technical field of printing nickel screens, in particular to an acid and alkali resistant high-strength composite printing nickel screen and a preparation method thereof. The composite printing nickel screen comprises a printing nickel screen base body, and a nickel electroplating layer, a chromium electroplating layer and a photosensitive resin layer are sequentially arranged on the surface of the printing nickel screen base body from inside to outside. The photosensitive resin layer is prepared from a polyurethane-acrylate prepolymer and sulfydryl silicon resin through a sulfydryl-olefin click chemical reaction; the preparation method comprises the steps that S1, a core mold is put into a first nickel plating electroplating solution for nickel plating, a nickel net is separated from the core mold, and a printing nickel net base body is obtained; s2, the printing nickel net base body is put into a second nickel plating electroplating solution for nickel plating, and the surface of the printing nickel net base body is covered with an electroplated nickel layer; then plating chromium; and S3, preparing a photosensitive resin layer on the surface of the electroplated chromium layer. According to the invention, the strength, acid and alkali resistance and other properties of the printing nickel screen are comprehensively improved, the application problem of the traditional technology in a severe environment is solved, and a new technical path is provided for the high-performance printing nickel screen.

The invention relates to the technical field of metal material processing application, and discloses a wear-resistant camshaft and a processing technology thereof.The wear-resistant camshaft comprises, by mass, 10-12% of chromium, 5-7% of nickel, 3-4% of carbon, 2-3% of molybdenum, 0.5-1% of vanadium, 0.2-0.3% of a high-silicon aluminum alloy, 0.1-0.3% of niobium, 0.1-0.2% of titanium and the balance Fe and inevitable impurities. The machining process comprises the steps that S1, raw materials containing the chemical components are smelted, discharged and inoculated, a covering agent is added again, stirring and slagging-off are conducted, and an alloy melt is obtained; s2, casting the alloy melt into a camshaft blank; s3, the blank is subjected to solution treatment and aging treatment; s4, the treated blank is subjected to high-frequency quenching and rough machining, and a camshaft preformed part is obtained; s5, the preformed part is subjected to laser cladding treatment, and a composite coating is formed; s6, carrying out plasma nitriding treatment on the cladded camshaft; and S7, the nitrided camshaft is subjected to phosphating treatment, and the finished camshaft is obtained. The wear resistance of the camshaft can be improved.

The invention relates to flexographic printing ink for cigarette wrapping paper and a preparation method of the flexographic printing ink, and the flexographic printing ink comprises the following components in parts by weight: 45-65 parts of urethane acrylate, 15-30 parts of 1, 3-propanediol, 1-3 parts of a curing agent, 1-3 parts of a defoaming agent and 1-3 parts The invention relates to a light-cured acrylic resin, which is prepared from the following components in parts by weight: 10 to 20 parts of 1, 6-hexanediol diacrylate, 10 to 20 parts of 2-phenoxyethyl acrylate, 8 to 16 parts of lauric acid methacrylate, 5 to 20 parts of filling modifier, 0.1 to 10 parts of pigment, 0.1 to 1 part of dispersing agent, 0.1 to 1 part of defoaming agent and 3.1 to 6.2 parts of photoinitiator. The UV flexible ink prepared by the invention not only has excellent glossiness, but also has higher surface hardness, wear resistance and adhesive force than the traditional UV ink, and is very suitable for printing on high-end cigarette packaging paper.

The present invention relates to a thermoplastic resin composition, a method for preparing the same, and a molded article comprising the same. More specifically, the present invention relates to a thermoplastic resin composition, wherein the alkyl acrylate coverage value (X) of the thermoplastic resin composition calculated by equation 1 is 67% or more, and the present invention also relates to a method for preparing the thermoplastic resin composition and a molded article comprising the thermoplastic resin composition. The thermoplastic resin composition according to the present invention does not contain phthalate compounds that are environmental hormones harmful to the human body; does not release toxic gases in the event of a fire; has processability equal to or better than that of PVC resin used as a material for calendering and T-die extrusion; has excellent mechanical properties such as impact strength, tensile strength and elongation, surface hardness and heat resistance; and can prevent whitening during bending due to excellent non-whitening properties.

A polycarbonate composite composition is provided that exhibits improved surface hardness while maintaining impact strength. The polycarbonate composite composition comprising polycarbonate and specific ester repeating units according to the invention is characterized by excellent surface hardness while retaining the inherent basic physical properties of polycarbonate.

The invention discloses a polyurethane coating with hydrophobicity and multiple curing performance and a preparation method of the polyurethane coating. Aliphatic diisocyanate and unsaturated dihydric alcohol are used as raw materials to prepare an unsaturated polyurethane prepolymer containing-NCO end groups, then a hydroxyl-terminated silane coupling agent synthesized through sulfydryl double bond reaction is added for sealing, and the polyurethane coating is prepared. A series of silane-terminated unsaturated polyurethane is obtained through reaction and can be used for preparing a polyurethane coating with hydrophobicity and multiple curing performance; polyurethane with the main chain being a carbon chain containing double bonds and the end group being silane is synthesized, rapid ultraviolet light hardening of the surface of the coating is achieved, the end group silane rapidly migrates to the surface, the interior of the coating is crosslinked through multiple curing, the hydrophobicity, the adhesive force, the surface strength and other performance of the coating are effectively improved, and the coating has the good application prospect. The method has potential application prospects in the fields of buildings, automobiles, aerospace and the like.

The invention discloses an enamel glaze inorganic non-stick coating material and a coating method thereof. The enamel glaze inorganic non-stick coating material is prepared from 30%-40% of aluminum porcelain glaze, 20%-25% of silicon dioxide, 5%-10% of metal titanium powder, 8%-10% of titanium oxide, 5%-10% of albite powder, 1%-1.5% of carbon fibers, 0.3%-0.5% of a wetting agent, 20%-30% of purified water and 0.3%-0.5% of a defoaming agent. The method comprises the following process steps: cleaning a base material, preparing a coating, carrying out sand blasting on the surface of the base material in the step (1), spraying the coating in the step (2) on the base material in the step (3) to form a bottom coating, then cooling, spraying the coating in the step (2) on the base material in the step (4) to form a surface coating, and then baking and sintering in sequence. And finally, standing and cooling to obtain a finished product. According to the invention, not only is the problem of using on a single pot product solved, but also the hardness and the wear resistance are improved, and the overall service life is greatly prolonged.

A nickel-plated heat-treated steel plate having excellent workability and a method for manufacturing the same. The nickel-plated heat-treated steel plate comprises: a base steel plate; a nickel layer formed on one or both surfaces of the base steel plate; and a nickel-iron (Ni-Fe) alloy layer formed between the base steel plate and the nickel layer, and the nickel-plated heat-treated steel plate has a surface Rockwell hardness of 52 to 62.

The utility model discloses a decorative membrane and a decorative part, the decorative membrane comprises a base material layer, a texture layer and an ink layer, the texture layer and the ink layer are sequentially laminated on the base material layer, the decorative membrane further comprises a high extension layer arranged between the base material layer and the texture layer, and the elongation at break of the high extension layer is 130-150%. The decorative membrane has excellent tensile property, is easy to process, mold and inject, and can be suitable for decoration of complex shapes; the prepared plastic has excellent simulation degree, is suitable for decorative parts with wood grain-like and metal effects, has a good decorative effect, and can cover flow mark defects on the plastic surface in the injection molding process.

This invention discloses an additive repair method for a clutch drive shaft platform based on laser cladding technology, comprising: preheating the clutch drive shaft and Fe-5 iron-based powder before welding; using Fe-5 iron-based powder to perform laser melting additive manufacturing on the worn area of ​​the clutch drive shaft with no machining allowance; and subjecting the laser-melted additively manufactured clutch drive shaft to slow cooling after welding and supplementary machining, thus completing the clutch drive shaft repair. This invention transforms subtractive repair into additive repair, selecting Fe-5 iron-based powder as the additive repair powder, so that after laser cladding, its surface hardness reaches or exceeds that of the original carburized substrate surface, allowing direct cladding on the original clutch drive shaft platform, restoring the clutch drive shaft, which cannot be repaired by grinding, to its original process level. Simultaneously, the wear resistance of the repaired platform is verified through fretting wear testing.

The invention relates to the technical field of coatings, in particular to a photo-thermal composite curing glass coating composition, a preparation method thereof and a coating. The invention discloses a photo-thermal composite curing glass coating composition which comprises epoxy resin, an epoxy flexibilizer, an acrylate monomer, a diluent, an acrylate cross-linking agent, a cationic photoinitiator, a free radical photoinitiator, a coupling agent, a sensitizer and other additives. The photo-thermal composite curing composition simultaneously contains a cationic system and a free radical system, free radical polymerization and cationic polymerization can be carried out, an interpenetrating network is formed in the curing process, and the photo-thermal composite curing composition has excellent adhesive force, flexibility, water soaking resistance, strong wine soaking resistance and boiling resistance when being used as a glass coating.

The invention relates to the technical field of metal materials, in particular to cavitation-erosion-resistant low-density steel and a preparation method thereof.The cavitation-erosion-resistant low-density steel is prepared from, by mass, 24.5% of Mn, 0.86% of C, 10-13% of Al and the balance Fe, the total percentage is 100%, the surface layer of the Fe-Mn-Al-C steel treated through the method becomes more compact, and the surface hardness and strength are both greatly improved. In addition, after being treated by the method, the Fe-Mn-Al-C steel surface structure is more uniform, the cavitation erosion resistance, wear resistance, corrosion resistance and other properties are obviously improved, and the requirements of harsh service conditions are met.