19results about How to "Reduce toughness" patented technology

This invention relates to the field of polymer material synthesis technology, specifically to a modified PVB resin and its preparation method. The invention introduces a fluorinated acetal monoaldehyde derivative containing fluorine into the PVB resin. This derivative is mixed with n-butyraldehyde and glyoxal, thereby undergoing an acetalization reaction with the 1,3-o-diol structure of the PVB molecular chain, incorporating the fluorinated side link into the PVB molecular chain. Utilizing the high electronegativity and high C-F bond energy of fluorine atoms, it shields against the intrusion of external corrosive media, inhibits oxidative yellowing, and improves weather resistance. Furthermore, the invention introduces glyoxal as a crosslinking agent, containing dialdehyde groups, which can react between adjacent polyvinyl alcohol segments, causing slight crosslinking between the originally linear PVB resin segments, improving the resin's shielding performance, further reducing the intrusion of external corrosive media, and enhancing the stability of the PVB resin.

The utility model discloses a distance adjusting device for ceramic roller spraying. The distance adjusting device comprises a spraying distance adjusting mechanism, a temperature measuring sensor and a master control module, the spraying distance adjusting mechanism is connected with a spraying gun and can adjust the distance between the spraying gun and a workpiece to be coated, and the temperature measuring sensor can measure the temperature of the surface of the workpiece to be coated. The temperature measuring sensor and the spraying distance adjusting mechanism are in signal connection with the master control module. The temperature measuring sensor is provided with a temperature sensor and used for measuring the surface temperature of a coated workpiece, and the master control module can find the situation that the surface temperature of the ceramic roller is too high through the temperature measuring sensor and control the spraying distance adjusting mechanism to adjust the distance between the spraying gun and the coated workpiece. And the surface temperature of the ceramic roller is reduced to a range in which deformation of the ceramic roller and reduction of the toughness of the net wall are not caused.

The invention relates to the technical field of brake disc materials, and discloses a brake disc material prepared from a carbon-ceramic composite material and a processing technology thereof.The processing technology comprises the following steps that phenolic resin, carbon powder, metal oxide, composite carbon fibers and a pore forming agent are evenly mixed and then placed in a mold, and a composite material prefabricated body is obtained through compression molding and cold water demolding; processing the composite material preform to form a carbon-ceramic brake disc rough blank, and then performing carbonization treatment to obtain a carbonized composite material; and mixing the carbonized composite material with silicon powder, carrying out siliconizing treatment, soaking in a protective solution, sintering, taking out, polishing and perforating to obtain the brake disc material prepared from the carbon-ceramic composite material. The composite carbon fiber contains a large number of silicon hydroxyl groups and can be tightly combined with phenolic resin, carbon powder, metal oxide and a pore-forming agent, and the polycarbosilane layer generates a nanoscale silicon carbide phase, so that the mechanical property and wear resistance of the brake disc material prepared from the carbon-ceramic composite material can be improved.

The invention belongs to the technical field of metallurgy, and particularly relates to 590MPa-grade hot galvanizing dual-phase steel and a production method thereof, and the steel comprises the following chemical components in percentage by mass: 0.02%-0.06% of C, 0.01%-0.03% of Si, 0.90%-1.8% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.005%-0.010% of Al, 0.05%-0.30% of Cr, 0.05%-0.30% of Mo, less than or equal to 0.0060% of O, 0.010%-0.020% of N, and the balance of Fe and inevitable impurities. The method has the advantages that low carbon-silicon-aluminum and high nitrogen are cooperatively regulated and controlled in component design, and in the hot rolling process, premature precipitation of AlN particles in the hot rolling process is effectively inhibited by controlling the low coiling temperature, so that a large amount of nitrogen is reserved in a hot rolled plate in a solid solution state.

The invention discloses high-strength hot rolled steel and a preparation method thereof, and the high-strength hot rolled steel comprises the following components in percentage by mass: 0.06%-0.09% of C, 0.05%-0.15% of Si, 1.8%-2.0% of Mn, less than or equal to 0.015% of P, less than or equal to 0.002% of S, 0.11%-0.145% of Ti, 0.1%-0.2% of Cr, 0.04%-0.05% of Nb, 0.01%-0.02% of V and less than or equal to 0.005% of N. The preparation method comprises the following steps: smelting and casting raw materials to obtain a plate blank; and the plate blank is heated, rolled, cooled, coiled and subjected to slow cooling treatment. Under the condition that molybdenum is completely not contained, the high-toughness hot-rolled steel plate with the thickness being 9-14 mm, the yield strength being larger than or equal to 700 MPa, the tensile strength being larger than or equal to 770 MPa, the percentage elongation after fracture being larger than or equal to 16% and the transverse impact energy being larger than or equal to 70 J at the temperature of-20 DEG C is successfully produced.

The invention relates to the technical field of food processing, in particular to dried orange peel and Chinese yam soft rice and a preparation technology thereof. In order to improve the health preserving effect of the soft steamed bun, the raw materials and the preparation process of the soft steamed bun are improved, dried tangerine or orange peel and Chinese yam components are added into the raw materials, and during dough preparation, Chinese yam paste is used for replacing part of flour, so that part of Chinese yam flavor can be added to the dough by adding the Chinese yam paste into the dough, and the health preserving effect of the soft steamed bun is improved. Moreover, the bread paste can play a role in partially blanching the bread paste, improve the taste of the bread paste and improve the water-holding and moisture-preserving capability of the paste; in order to avoid reduction of dough toughness, part of vital gluten is also added, so that the dough toughness is improved, and the defect of insufficient bread baking expansion caused by reduction of gluten supporting force due to addition of the Chinese yam paste is overcome; on the basis of the traditional soft European bun stuffing, the pericarpium citri reticulatae powder is added into the soft European bun stuffing, so that the greasy phenomenon caused by excessive sweetness and oil of the traditional stuffing can be effectively improved by adding the pericarpium citri reticulatae powder, and the aftertaste of the soft European bun in the mouth is improved.

The invention discloses intelligent processing equipment for a high polymer material, belongs to the technical field of crushing equipment, and is used for solving the technical problems of slipping and wire drawing during crushing and grinding of polytetrafluoroethylene. The intelligent processing equipment for the high polymer material comprises a crushing mechanism, an embrittlement mechanism and a grinding mechanism; a pair of crushing rollers is rotationally connected into the first shell, and the space in the first shell is divided into a first cavity and a second cavity through the crushing rollers, wherein the first cavity and the second cavity communicate with each other. The device has the beneficial effects that the phenomenon of wiredrawing is inhibited while the problem of slipping of polytetrafluoroethylene fragments is avoided, and the continuous and efficient crushing process is ensured; a plasma embrittlement and liquid nitrogen freezing embrittlement two-stage embrittlement process is adopted, so that polytetrafluoroethylene particles are easy to break in the grinding stage, a sieve plate and nitrogen micro-positive pressure auxiliary screening are combined, powder with the target particle size can be stably obtained, and the particle size uniformity of the product is remarkably improved.

The utility model discloses a quick shoe lining cutting machine, which relates to the technical field of shoemaking equipment and comprises a bin body, the top of the bin body is fixedly connected with a first hydraulic rod, one end of the first hydraulic rod penetrates through the top of the bin body and is fixedly connected with a sliding connecting seat, and the outer wall of the sliding connecting seat is slidably connected with a sliding sleeve bin. A buffering reset mechanism is arranged between the sliding connecting base and the sliding sleeve bin, the inner side wall of the sliding connecting base is fixedly connected with a pneumatic knocking hammer, and the pneumatic knocking hammer corresponds to the sliding sleeve bin in position. According to the bin body provided by the utility model, on the basis that pressure is applied through continuous knocking to avoid incomplete cutting, materials can be automatically separated from a mold, so that the problem that the materials are incompletely cut when the shoe lining cutting machine faces thicker or harder materials is solved; and the cut-off material is easy to be clamped in the mold.

The application provides a new type of gasket material for intelligent self-lubricating joint bearings and a preparation method and application thereof, and belongs to the technical field of composite materials, self-lubrication and intelligent monitoring, in particular, the preparation method of the new type of gasket material for intelligent self-lubricating joint bearings comprises the following steps: S1: preparing a conductive synergistic material; S2: preparing a modified performance reinforcing material; S3: preparing a phenolic resin diluent; S4: preparing a conductive modified phenolic resin adhesive film; S5: preparing an insulating modified phenolic resin adhesive film; S6: preparing a pretreated fabric; and S7: preparing a new type of gasket material. The new type of gasket material for intelligent self-lubricating joint bearings prepared by the above method can realize the integration of "material-function", intelligently monitor the wear state of the bearing according to the step change of the electrical conductivity, has the advantages of excellent friction-reducing and wear-resistant performance and high sensitivity, can significantly simplify the structure of the bearing system and reduce the maintenance cost, and is suitable for the fields of aerospace and the like.

The invention discloses high-hardness nickel-based composite powder for laser cladding and a laser cladding method thereof.The composite powder is composed of 1-4 wt% of nearly-spherical pure aluminum powder and the balance nickel-based high-temperature alloy powder, the average particle size of the nearly-spherical pure aluminum powder is 100-150 microns, the average particle size of the nickel-based high-temperature alloy powder is 75-150 microns, and the nickel-based high-temperature alloy powder is composed of 15-17 wt% of Cr, 2-4 wt% of Fe, 3-4 wt% of B, 1-2 wt% of Si, 0.5-1 wt% of C and the balance Fe. And the balance of Ni. According to the method, the two kinds of powder are evenly mixed through the acoustic resonance mixing technology, molten pool flowing and solidification in laser cladding are changed by regulating and controlling the content of aluminum powder, the crack sensitivity is reduced, and therefore a large-area crack-free cladding layer is obtained, meanwhile, the Cr element in the nickel-based high-temperature alloy powder can react with the B element and the C element so that hard ceramic phase chromium boride and chromium carbide can be separated out, and therefore the large-area crack-free cladding layer can be obtained. And the hardness of the cladding layer is greatly improved.

This utility model discloses a portable bamboo furniture frame bending machine, relating to the field of bamboo furniture processing technology. It includes a base, with a conveyor belt fixedly connected to its upper surface. A fixed frame is fixedly connected to the left side of the upper surface of the conveyor belt. Synchronous cylinders are fixedly connected to both sides of the upper surface of the fixed frame. The lower end of each synchronous cylinder passes through the fixed frame and is fixedly connected to a movable frame inside the fixed frame. Heating rollers are evenly distributed and rotatably connected to the inner surface of the movable frame. Slider blocks are fixedly connected to the front, rear, left, and right sides of the outer surface of the movable frame. Compared with existing ordinary bamboo furniture frame bending machines, this portable bamboo furniture frame bending machine can automatically limit and convey the frame, and heat the frame during conveying. It eliminates the need for manual processing of each frame individually; simply placing the frame to be processed on the conveyor belt allows for automatic transport and processing, greatly improving the convenience and efficiency of the process.

The utility model provides a kind of cutter. Wherein, the edge of cutter has concave-convex structure extending along length direction, and the surface of the concave-convex structure has multiple micro-protrusions. According to the cutter of the utility model, the edge is provided with concave-convex structure along the length direction of cutter, and the surface of the concave-convex structure has multiple micro-protrusions. In other words, the edge of the cutter of the utility model has multistage dentiform structure, so, compared with micro-sawtooth structure, since the edge has multistage dentiform structure, under the assistance of concave-convex structure, micro-protrusion is more easily cut into food material, so that the sharp performance of cutter can be guaranteed well and durably.

This application relates to the technical field of fiberglass reinforced plastics (FRP), and in particular to an unsaturated polyester resin for FRP, a method for preparing the same, and FRP. The unsaturated polyester resin comprises the following raw materials in parts by weight: diols: neopentyl glycol 22-30 parts, 2,2-diallyl bisphenol A 2-4 parts, and bisphenol fluorene 5-9 parts; diacids: isophthalic acid 5-15 parts, terephthalic acid 5-15 parts; acid anhydrides: phthalic anhydride 3-15 parts, maleic anhydride 5-17 parts; toughening agent: double-ended hydrogen-capped silicone oil 5-9 parts; platinum catalyst: the amount of platinum catalyst added is 30-150 ppm of the total mass of 2,2-diallyl bisphenol A and double-ended hydrogen-capped silicone oil; diluent 25-45 parts; polymerization inhibitor 0.01-0.06 parts. It has the advantage of improving the hardness and toughness of the unsaturated polyester resin, thus enhancing its corrosion resistance.

The utility model provides a cutter. The cutter comprises a cutter body and a hard layer, and the cutter body comprises a cutting edge area formed by a first inclined face and a second inclined face which intersect in the thickness direction of the cutter body; the hard layer is formed on the first inclined surface of the cutting edge area and extends to the end position of the cutting edge area or extends out of the end position of the cutting edge area, so that a cutting edge part of the cutter is formed; the hardness of the hard layer is larger than that of the cutter body. According to the cutter disclosed by the utility model, the cutting edge part of the cutter with proper hardness can be obtained through the cutter body and the hard layer, so that the cutter with the cutting edge part has good and lasting sharpness.

The application belongs to the technical field of resin materials for copper-clad plates, and particularly relates to a carbon-hydrogen resin composition for prepreg and a preparation method thereof. The carbon-hydrogen resin composition is prepared from the following raw materials in parts by mass: hyperbranched modified prepolymer resin 90-100 parts, inorganic filler 15-25 parts, silane coupling agent 0.2-0.4 parts, crosslinking agent 10-20 parts, initiator 0.8-1.5 parts, dibutyltin dilaurate 0.1-0.3 parts, antioxidant 0.5-1 part, and toluene 50-80 parts. The carbon-hydrogen resin composition prepared by the application has low dielectricity, high thermal conductivity, high heat resistance, high toughness, and excellent processing forming property.

The present invention discloses a B-containing high-strength stainless steel for highway guardrails and its preparation method, belonging to the technical field of stainless steel manufacturing processes; the chemical composition of the stainless steel is: 0.10% < C ≤ 0.18%; 0.35% ≤ Si ≤ 0.7%; 9% ≤ Mn ≤ 15%; 12.5% ≤ Cr ≤ 15%; 0.5% ≤ Ni < 1.0%; 0.2% ≤ N ≤ 0.3%; 0.4% ≤ Cu ≤ 1.0%; 0.004% ≤ B ≤ 0.010%; P ≤ 0.010%; S ≤ 0.010%, and the balance is Fe; the stainless steel is smelted from raw materials in a vacuum induction furnace, cast into an ingot, and then the ingot is subjected to homogenization, forging and rolling treatments; the stainless steel of the present invention has excellent mechanical properties and can meet the requirements of highway guardrail steel without subsequent heat treatment; when this material is applied to highway guardrails, its high yield strength, elongation and good corrosion resistance can achieve the lightweight of guardrail plates; it solves the problem that the mechanical properties and corrosion resistance of stainless steel for highway guardrails cannot be兼顾. It should be noted that the word "兼顾" in the original text might not be accurately translated as "兼顾" in the English version. A more appropriate expression could be "balanced" or "taken into account simultaneously". The above translation is for reference only, and you can adjust it according to the actual context and requirements.

The invention relates to the field of metal materials, in particular to a niobium-containing 304 austenitic stainless steel plate for nuclear power and a preparation method of the niobium-containing 304 austenitic stainless steel plate for nuclear power, and the niobium-containing 304 austenitic stainless steel plate comprises the following components in percentage by mass: 0.02%-0.06% of C, 1.00%-2.00% of Mn, 0.20%-0.75% of Si, 0-0.030% of P, 0-0.005% of S, 18.00%-19.50% of Cr, 8.00%-10.50% of Ni, 0.2%-0.8% of Nb, 0-0.10% of Cu, 0-0.10% of Co, 0-0.10% of N and the balance of Fe and other inevitable impurities. The 304 austenitic stainless steel is improved, and the niobium element is added, so that stable production of the 304 austenitic stainless steel plate for nuclear power can be ensured, the 304 austenitic stainless steel plate has excellent grain size, intergranular corrosion resistance and mechanical property, and the design requirements of steel for nuclear power are met.

The invention belongs to the technical field of solid-state electrolytes, and particularly relates to a lithium lanthanum zirconium oxide and polyacrylonitrile composite solid-state electrolyte, a preparation method and application thereof and an all-solid-state battery. The preparation method comprises the following steps: 1) preparing cubic phase LLZTO powder; (2) carrying out surface silanization treatment on the cubic phase LLZTO powder under an acidic condition; 3) preparing polyacrylonitrile, a polyion liquid, a lithium salt and the cubic phase LLZTO of which the surface is silanized into composite electrolyte slurry at room temperature; and 4) casting the composite electrolyte slurry to form a film, and then performing vacuum drying to obtain the lithium lanthanum zirconium oxide and polyacrylonitrile composite solid electrolyte. The LLZTO and polyacrylonitrile composite solid electrolyte provided by the invention can integrate the advantages of organic and inorganic materials, solves the problem of contact between traditional polyacrylonitrile and LLZTO and a positive electrode side interface, and realizes a stable composite structure with high voltage resistance, high temperature resistance and high ionic conductivity.

A high-strength steel for precision hinges, its preparation method, and a precision hinge are disclosed. The invention relates to the field of high-strength steel preparation technology and includes the following steps: mixing corresponding powders based on the mass percentage of components in the high-strength steel to obtain composite powder; subjecting the composite powder to spark plasma sintering under vacuum or inert gas protection to obtain a metal block, with sintering parameters of: sintering temperature of 950~1150℃, heating rate of 50~200℃ / min, sintering pressure of 30~80MPa, and sintering time of 3~15min; and sequentially subjecting the metal block to solution treatment, quenching, cryogenic treatment, aging treatment, and air cooling to obtain the target product. This invention combines spark plasma sintering and subsequent treatments to control the nano-precipitates in the high-strength steel, enabling the high-strength steel to possess ultra-high strength, excellent toughness, high fatigue resistance, high wear resistance, and good corrosion resistance.