98results about How to "Reduce hardness" patented technology

The invention discloses a microalloyed high-toughness martensitic stainless steel cutter head as well as a preparation method and a preparation mold thereof. Stainless steel comprises the following components in percentage by weight: 0.3%-0.7% of C, 0.3%-1.0% of Si, 0.5%-1.5% of Mn, 16%-18.5% of Cr, 1%-2% of Ni, 0.3%-0.8% of Mo, 0.1%-0.35% of V, 0.1%-0.25% of Nb, less than or equal to 0.02% of S, less than or equal to 0.02% of P and the balance of Fe. Firstly, raw materials are smelted into molten iron; then adding a deoxidizing agent and precoated sand into the molten iron for molding, and performing sand mold casting and pouring to obtain a cutterhead blank; carrying out heat treatment on the cutter head blank; and finally, shot blasting and polishing are conducted on the cutterhead subjected to heat treatment. The martensitic stainless steel cutterhead has a metallographic structure which takes a martensitic structure as a main structure, takes austenite as an auxiliary structure and dispersedly distributes CrC, VC and NbC particles, the hardness of the martensitic stainless steel cutterhead is 40-45 HRC, the impact toughness of the martensitic stainless steel cutterhead reaches 92-95 J / cm < 2 >, the abrasion resistance of the cutterhead is longer, the service life of the cutterhead is longer, and the abrasion loss of the martensitic stainless steel cutterhead is reduced by 70% compared with a cutterhead without alloy elements.

The application belongs to the technical field of molds, and particularly relates to a mold for manufacturing a gas chamber core with an exhaust passage and a use method thereof. In order to solve the problems in the prior art that, when the exhaust passage of the gas chamber core is manufactured, the mold for the gas chamber core is provided with a movable block, the movable block cannot be placed with a filler, the punching method is used to cause low production efficiency and high production cost, and manual placement of the movable block causes production safety risks in the prior art. The application comprises a mold body, a movable block and a power device. The mold body is internally provided with a cavity of the gas chamber core, and a sand shooting port is arranged on the side surface and communicates with the cavity. The cavity comprises a cavity of the gas chamber core body and a connecting side cavity. The position of the connecting side cavity corresponds to the position of a connecting end of the gas chamber core and a runner core. The cavity of the gas chamber core body communicates with the connecting side cavity. The movable block is slidingly installed in the connecting side cavity, one end of the movable block is connected with a power end of the power device, and the other end of the movable block is internally provided with a hollow cavity. A heat insulation piece is installed in the hollow cavity.

This invention discloses a processing device and installation method for a manhole hoop ring in a diaphragm. The processing device includes a straightening rod assembly, which comprises a telescopic rod, a screw top plate, a hoop ring clamping plate, and a locking component. The screw top plate is located at both ends of the telescopic rod, and the locking component is located between the screw top plate and the hoop ring clamping plate. The installation method includes the following steps: 1. Fixing the half hoop ring on a straightening platform; 2. Preheating the half hoop ring using a hoop ring reciprocating heater; 3. Straightening the half hoop ring by bending; 4. Fixing the straightening rod assembly onto the half hoop ring; 5. Installing the half hoop ring into the manhole of the diaphragm; 6. Straightening the half hoop ring using the straightening rod assembly and spot welding it in place. The processing device in this invention is easy to adjust and highly applicable, solving the problem of installation issues caused by size mismatch between the existing hoop ring and the manhole of the diaphragm. The installation method is easy to operate, step-by-step, and has low operational difficulty. Adjustments can be made promptly during installation, ensuring installation quality.

This invention provides a QPQ surface strengthening method for flexible and rigid wheels in harmonic reducers, comprising the following steps: after machining the flexible or rigid wheel, it is sequentially degreased, cleaned, dried, and preheated; the preheated flexible or rigid wheel is nitrided to form a nitrided layer on its surface; the surface of the flexible or rigid wheel is treated mechanically or by tumbling; the polished flexible or rigid wheel is placed in molten oxide salt for oxidation treatment to form an oxide layer on the surface of the nitrided layer; after the oxidized flexible or rigid wheel is air-cooled, it is immediately rinsed with clean water and dried with hot air, and then coated with anti-rust oil. Compared with the prior art, this invention uses low-temperature salt bath nitriding and oxidation treatment, the QPQ process is short, has fewer process steps and is easy to control, and the salt bath can be recycled. The surface hardness of the workpiece reaches 800-850 HV, and the wear rate is reduced by more than 70% compared with the traditional tempering process, significantly extending the service life of the workpiece.

The invention discloses a quenched and tempered seamless line pipe with narrow strength fluctuation and a manufacturing method thereof. The quenched and tempered seamless line pipe comprises the following components in percentage by weight: 0.06-0.10% of C, 1.40-1.65% of Mn, less than or equal to 0.05% of Cu, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Cr, less than or equal to 0.30% of Si, 0.05-0.20% of Mo, 0.01-0.05% of Nb, 0.03-0.07% of V, less than or equal to 0.020% of Ti, less than or equal to 0.0005% of B, less than or equal to 0.015% of P, less than or equal to 0.005% of S and the balance of Fe or other impurity elements. And Cu + Ni + Cr is less than or equal to 0.10%. According to the method, the strength fluctuation of the whole seamless pipeline pipe product after thermal refining is smaller than 25 MPa, the strength performance stability can be improved, and the use performance of the product is improved.

The invention discloses a cell wall associated kinase gene VvWAKL8 for regulating and controlling texture formation of grape fruits and application thereof, the cell wall associated kinase gene VvWAKL8 is cloned from the grape fruits for the first time, the nucleotide sequence of the cell wall associated kinase gene VvWAKL8 is as shown in SEQ ID NO.1, and the coded amino acid sequence is as shown in SEQ ID NO.2. Research finds that the VvWAKL8 is specifically and highly expressed in the hard-pulp grape variety, and subcellular localization analysis shows that the protein is localized in a cell membrane; instantaneous overexpression of VvWAKL8 in grape fruits can significantly improve fruit hardness and regulate pectin metabolism related gene expression, and verifies the core function of VvWAKL8 in fruit texture formation. The research reveals that the VvWAKL8 is a key gene for regulating and controlling the grape fruit texture for the first time, a brand new gene resource is provided for molecular marker-assisted breeding of a new storage-resistant grape variety, and an important foundation is laid for deeply analyzing a cell wall signal to regulate and control a molecular mechanism of fruit development.

The invention relates to the technical field of liquor industrial wastewater treatment, in particular to an advanced treatment system and method for liquor industrial wastewater. Comprising a water inlet pump, a quartz sand filter in pipeline connection with the water inlet pump, a self-cleaning filter in pipeline connection with the quartz sand filter, an ultrafiltration device in pipeline connection with the self-cleaning filter, an ultrafiltration water producing tank in pipeline connection with the ultrafiltration device, and a nanofiltration water feeding pump in pipeline connection with the ultrafiltration water producing tank, according to the present invention, the problem that the organic matter cannot be deeply and substantially removed after the biochemical treatment can be solved, and the separation treatment cost is low, and the high-cost treatment modes such as the advanced oxidation process such as Fenton do not need to be adopted so as to substantially reduce the production operation cost. According to the invention, blockages are backwashed to the micro-electrolysis device at the same time, so that the problem of blockage can be solved, and the centralized treatment efficiency of high-concentration pollutants causing blockage is also greatly improved.

The utility model belongs to chemical industry wastewater treatment technical field, concretely relates to a device for removing the hardness of desulfurization wastewater. Including coagulation tank I, coagulation tank II, flocculation tank, plug -flow lift tank, inclined plate sedimentation tank, neutralization tank, coagulation tank I bottom is connected with wastewater import pipeline, top is connected in coagagulation tank II through overflow, coagulation tank II bottom is connected in the flow guide cylinder of flocculation tank through the flow guide pipe, in its bottom other side is connected in plug -flow lift tank, plug -flow lift tank top is connected in inclined plate sedimentation tank through overflow, the other side of inclined plate sedimentation tank top is connected in neutralization tank through overflow, neutralization tank bottom is connected in the outer jacket through the opening, and the opening in the upper portion of outer jacket is connected with outlet pipeline, and the bottom conical concentration area side of inclined plate sedimentation tank is equipped with sludge production recycling pipeline connection to flocculation tank. The utility model has relatively simple structure, and the effect of removing hardness is obvious.

This invention belongs to the field of material surface treatment technology, specifically relating to a wafer polishing slurry, its preparation method, and its application. The wafer polishing slurry comprises abrasives, oxidants, dispersants, surfactants, pH adjusters, and water. The components of the wafer polishing slurry work synergistically, shortening polishing time and improving polishing efficiency when applied to wafer polishing. Furthermore, it significantly improves the surface quality of the polished wafer, markedly reducing scratches and defects, and lowering surface roughness to below 0.15 nm, thus meeting the surface quality requirements of fields such as power electronics and radio frequency devices.

This invention provides a TiC-based non-magnetic alloy, its preparation, and its application. The TiC-based non-magnetic alloy comprises, by weight percentage: Ni 25–40 wt%, Cr 5.5–8.6 wt%, Mo 2.5–4.0 wt%, C 0.8–1.3%, TiC 46–66 wt%, and other unavoidable trace impurities. The TiC-based non-magnetic alloy comprises TiC, Ni, Cr, Mo, and C, with appropriate proportions of each component, resulting in low magnetic properties, high hardness, high wear resistance, high-temperature performance, oxidation resistance, and corrosion resistance. Furthermore, the hard phase uses TiC, which has a low self-lubricating coefficient, and excludes WC. Therefore, the TiC-based non-magnetic alloy has a uniform grain size distribution, good internal stress consistency, and is less prone to cracking and deformation, extending its service life and demonstrating good product stability.

The application relates to a grain refinement and ignition performance synergic optimization preparation method of a rare earth ignition alloy, and belongs to the technical field of rare earth ignition alloy manufacturing. According to percentages, the preparation raw material of the blank includes 35-45% of lanthanum, 15-30% of cerium, 5-15% of tin, 5-10% of zinc, 5-10% of praseodymium, 1-5% of neodymium and 15-25% of iron. The synergic action of the nanoscale active metal additive and the blank enables the rare earth ignition alloy to generate continuous sparks under slight friction or impact, and improves the ignition performance of the traditional rare earth ignition alloy.

This application discloses a rubber reeling chain device and a corn harvester, belonging to the field of agricultural machinery technology. It includes a reeling chain body, a pusher plate, a limiting component, and a reeling chain core. The reeling chain body has a ring-shaped structure, with pushers spaced apart on the outer side of the reeling chain body. Both the reeling chain body and the pushers are made of rubber. The limiting component is located on the inner side of the reeling chain body and is used to install and limit the reeling chain core. The reeling chain cores are arranged along the inner side of the reeling chain body, forming a limiting cavity between adjacent reeling chain cores. The reeling chain body is used to engage with the teeth of an external sprocket through the limiting cavity and thus wrap around the sprocket. The pusher plate is driven by the reeling chain body to push the material. The reeling chain body and pusher plate are made of rubber, and the reeling chain cores are arranged and installed on the inner side of the reeling chain body through the limiting component, facilitating the engagement of the reeling chain cores with the teeth of the external sprocket and making it easier to replace a metal chain.

The invention discloses a method for controlling Ds inclusions in bearing steel produced by a small-section casting blank, and relates to the technical field of steel smelting. Comprising the steps that the element mass fraction, the temperature and the oxygen activity of molten steel are collected, a Ds type inclusion oxide system is determined and matched with a phase diagram, and the generation state of Ds type inclusions is accurately judged through phase diagram positioning and reaction quotient-equilibrium constant comparison; and adding ferrosilicon alloy to directionally convert the ferrosilicon alloy into harmless silicate, and supplementing oxygen activity double-threshold control and refining slag regulation and control. Compared with a traditional method for producing bearing steel through a small-section casting blank, when calcium and aluminum inclusion products are monitored, fine adjustment of silicon iron is automatically triggered, inclusion components are locked in a silicate inclusion interval, the pain point of hysteresis of manual regulation in the traditional smelting process is solved, active regulation of the inclusion components is achieved, and the production efficiency of the bearing steel is improved. And finally, the purpose of effectively controlling the Ds type inclusions of the bearing steel casting blank is achieved.

The present application relates to the technical field of 3D printing, in particular to a processing step and method of a coating process TPU. The present application uses the post-processing technology of the formed part to process the formed part, which not only improves the FDM printing speed by 3-4 times, can realize the successful printing of complex models that cannot be realized in the FDM printing process of TPU, and breaks through the color printing of flexible materials. Moreover, after the processing of the formed part, the interlayer bonding force is greatly increased, and the surface effect is equivalent to the SLA surface fineness. Such a process not only breaks the limitation of 3D printing that can only print single color with special design shoes, but also greatly reduces the printing equipment cost, the formed part printing cost, improves the efficiency, realizes color printing, and more importantly, the printed object can be directly worn. At the same time, the hardness of the formed part of the present application will be maintained at about 70A, which is suitable for printing various wearable products and is suitable for various industries.

This utility model relates to the technical field of round tube bending, and in particular to a mandrel-less round tube bending device. When bending a round tube, it can preheat the bending portion, improving the plasticity of the bending portion, reducing its hardness, and preventing cracking during the bending process. It is convenient to use and has high reliability and practicality. The device includes a base plate; it also includes a moving mechanism, a rotating mechanism, a heating mechanism, a clamping mechanism, and a pressing mechanism. The rotating mechanism is mounted on the moving mechanism and is used to move the rotating mechanism left and right. The heating mechanism is mounted on the base plate and has a heating function. The clamping mechanism is located to the right of the heating mechanism, and the pressing mechanism is located to the right of the clamping mechanism and has a pressing function. The heating mechanism is located to the right of the rotating mechanism.

This utility model belongs to the technical field of auxiliary equipment for construction projects, and relates to a waste crushing device for construction projects. It includes an upper drying oven detachably mounted on a lower crushing box. The inner cavity of the upper drying oven is connected to the lower crushing box via opposing feed plates. A water tank is located at the bottom of the inner cavity of the lower crushing box, and a return feed filter plate is located above the water tank. The two feed plates and the side wall of the upper drying oven form a first cavity and a second cavity. A screw sealing component is installed in the first cavity, and a cooling spray assembly is installed in the second cavity. This utility model uses the upper drying oven to buffer and heat the sand and gravel waste, and then uses the cooling spray assembly to rapidly cool the sand and gravel in the lower crushing box. The synergistic effect of heating and cooling reduces the hardness of the sand and gravel, making it easier to crush. The water used in the cooling spray process can flow back to the water tank, reducing water waste. Furthermore, the sprayed water mist can fully contact the dust, causing the dust to settle quickly, thereby effectively reducing the dust concentration during the crushing process.

The variable-speed corn thresher with the protection function comprises a shell, a first connecting mechanism and a second connecting mechanism are installed on the outer surface of the shell respectively, the first connecting mechanism and the second connecting mechanism are jointly connected with a plastic pressing plate, a machine box is installed on one side face of the shell, and the machine box is connected with the plastic pressing plate. A variable-speed motor is installed on the inner wall of the machine box, a bearing is fixedly embedded in one side face of the shell, the output end of the variable-speed motor penetrates through an inner ring of the bearing and extends into the shell, and plastic threshing teeth are fixedly installed at the output end of the variable-speed motor. According to the corn husking device, one side face of each plastic husking tooth and the output end of the variable-speed motor are fixedly installed, so that a user can conveniently adjust the rotating speed of the plastic husking teeth, the hardness of a plastic pressing plate and the hardness of the plastic husking teeth are smaller than that of metal, the outer surface of corn can be effectively protected, and the corn husking efficiency is improved. Therefore, corn kernels can be effectively prevented from being damaged when the corn kernels are peeled.

The application discloses an inorganic composite solid electrolyte and a preparation method thereof, and relates to the technical field of lithium batteries, and specifically discloses an inorganic composite solid electrolyte and a preparation method thereof. The preparation method of the inorganic composite solid electrolyte comprises the following steps: S1, mixing lithium salt, metal oxide A, metal oxide B and ammonium dihydrogen phosphate, wherein the metal oxide B is titanium oxide, and intermittent vibration ball milling is performed to obtain mixed powder; S2, adding lanthanum oxide and germanium oxide into the mixed powder obtained in the step S1, and continuing to perform intermittent vibration ball milling to obtain composite powder; and S3, performing low-temperature sintering on the composite powder obtained in the step S2, and pressing to obtain an inorganic composite solid electrolyte film layer. The preparation method can significantly improve the reaction activity and synergistic effect among raw materials by adopting two-step intermittent vibration ball milling and one-step low-temperature sintering, and the conductivity of the inorganic composite solid electrolyte and the lithium ion transmission performance and cycle life of the solid battery are improved, and meanwhile, no solvent is used in the preparation process, and the sintering cost is reduced.

This utility model discloses a calendering device for producing plastic protective film, comprising: a movable frame on the surface of a support base, a reciprocating electric push rod inside the movable frame, a striking plate at the lifting end of the reciprocating electric push rod, a fixed roller inserted into a vertical plate, a lifting plate on the side of the vertical plate, a lifting screw screwed into the lifting plate, a first bearing sleeved on the surface of the lifting screw, a positioning plate on the outer ring surface of the first bearing, a second bearing sleeved on one end of the support rod, and a calendering roller on the side of the second bearing; the beneficial effects are: firstly, the plastic protective film can be calendered by the cooperation of the fixed roller and the calendering roller, and then wound up by a winding mechanism; then, during the calendering process of the plastic protective film, the plastic protective film is first passed through the movable frame, and then the reciprocating electric push rod can be activated to make the striking plate strike the surface of the plastic protective film, thereby reducing the hardness of the rubber before calendering and facilitating subsequent calendering of the material by the fixed roller and the calendering roller.

The application discloses a grinding wheel flattening device and a grinding wheel flattening method. The grinding wheel flattening device comprises a base, an ultrasonic vibration unit connected to the base, a flattening unit comprising a mounting base connected to the ultrasonic vibration unit and a flattening component connected to the mounting base, the flattening component being used for contacting diamond abrasive grains of the grinding wheel during flattening and being capable of ultrasonic vibration in a direction parallel to a grinding surface, a carrier unit, and a pressurizing unit connected to the ultrasonic vibration unit and used for pressing the flattening component against the diamond abrasive grains. The flattening component is made of a material capable of catalyzing graphitization of the diamond abrasive grains. When the flattening component keeps contacting the diamond abrasive grains under a certain temperature, the surface layer of the diamond abrasive grains is graphitized, the hardness is reduced, and the diamond abrasive grains can be removed more easily, that is, the flattening speed can be improved.

This application discloses a rotary blade and a shaver having the same. The rotary blade includes a main body, which is cylindrical with a through hole. A portion of the main body protrudes away from its axis to form a protrusion, which surrounds at least a portion of the through hole. A cutting edge is formed on the protrusion. In this application, by forming a cutting edge on the protrusion, which serves as the actual cutting edge for cutting hair, the contact area between the rotary blade and the foil is reduced. This effectively reduces frictional heat generation between the rotary blade and the foil during shaver use, preventing the rotary blade from overheating and avoiding increased current load on the shaver, thereby improving user experience and safety. The protrusion surrounding at least a portion of the through hole allows cut hair to enter the through hole for easy cleaning, while preventing cut hair from accumulating on the surface of the main body and affecting subsequent shaving results.

This invention discloses a high-strength, high-elongation, low-hardness natural rubber and its preparation method. By weight, the high-strength, high-elongation, low-hardness natural rubber comprises the following components: 100 parts natural rubber, 1.5-3 parts crosslinking agent, 0.8-2 parts accelerator, 10-20 parts reinforcing agent, 5-15 parts softener, 1-3 parts antioxidant, and 3-8 parts activator. The high-strength, high-elongation, low-hardness natural rubber has a tensile strength ≥20 MPa, an elongation ≥700%, and a Shore A hardness of 35-45. Under normal operating conditions of -20℃ to 80℃, the fluctuation range of the tensile strength and elongation is controlled within ±5%, and the Shore A hardness fluctuation is ≤±2. This invention solves the technical problem of achieving a balance between high strength, high elongation, and low hardness in existing natural rubber formulations. The formulation components of this invention are widely available, the preparation process is simple, and the production cost is controllable. It can be widely applied in multiple fields and has extremely high practical value and promising prospects for promotion.

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.

This utility model relates to a high-precision stainless steel stretching forming mold, belonging to the field of stretching mold technology. The initial stretching mold realizes the blanking and stretching, and then the cleaning component cleans the initial part. After cleaning, the heat treatment component performs heat treatment to reduce the hardness of the initial part and eliminate internal stress. Then, the initial part is stretched and thinned a second time through the secondary stretching mold to form the intermediate part. Then, the 45-degree flanging mold and the 90-degree flanging mold are used to shape the angle of the intermediate part. Finally, the edge trimming mold removes the excess edges and corners of the intermediate part to form the finished part. This production process can reduce the cold work hardening of stainless steel and prevent surface scratches and cracks. After stretching and forming, the product can meet the requirements for surface roughness and flatness of the parts.

This application relates to the field of rubber materials technology, and discloses a hybrid particle, its preparation method and application, and a low-gas-permeability rubber composite material. The general chemical structural formula of the hybrid particle is: M n+ ( ‑ OOC) n -RM n+ It is a coordinating metal cation, ( ‑ OOC) n -R represents the carboxylate ion. This application describes the preparation of novel hybrid particles by organic carboxylic acids and inorganic metal ions through organic-inorganic coordination hybridization. Benefiting from the partially organic properties and low surface polarity of these hybrid particles, they exhibit excellent compatibility with the rubber matrix. When introduced into rubber, they can disperse well in the rubber matrix and form excellent interfacial bonds without additional modification. This significantly extends the gas permeation path in the rubber network and effectively reduces gas escape at weak interfaces, thereby greatly improving the gas barrier properties of the rubber material and reducing gas permeation.

The utility model discloses an environmental monitoring soil sampling device belongs to soil sampling technical field, and its technical scheme main points include soil sampler body, the surface welding of soil sampler body has the connecting plate, the top welding of connecting plate has the soil pretreatment mechanism, the both sides fixed connection of connecting plate has the auxiliary fixed establishment, the soil pretreatment mechanism includes the water storage jar, the filling pipe, the micro water pump, the connecting hose, the pilot pipe, the connecting ring and a plurality of sprayers, the water storage jar is welded in the top of connecting plate, the filling pipe fixed connection is in the top of water storage jar, the micro water pump is installed in the back of connecting plate top, the water pumping end fixed connection of micro water pump front side is in the bottom of water storage jar back, the water outlet of micro water pump back side is through and extends to the bottom of connecting plate, the connecting hose fixed connection is in the bottom of micro water pump back water outlet, the pilot pipe fixed connection is in the bottom of connecting hose.

The application discloses a polyvinyl alcohol chemical-proof glove and a manufacturing method thereof, and belongs to the field of glove materials and processing technology. In order to solve the problem of uneven flexibility and thickness of the existing gloves, the polyvinyl alcohol chemical-proof glove and the manufacturing method thereof are provided, and the glove comprises an inner lining layer and a PVA outer layer, and a water-based latex blending layer is formed between the PVA outer layer and the inner lining layer. The water-based latex blending layer is made of raw materials in the following weight proportions: PVA: 10-90; water-based latex: 140-200; glycerol: 8.0-15; polyglycerol: 5.0-15; high-molecular water-absorbing resin I: 2.0-4.0; defoaming agent: 0.5-1.5; bridging agent I: 0.5-2.0; and water: 300-400. The application can effectively reduce the probability of hydrogen bond formation between PVA molecular chains, destroy the regular structure of the film, reduce the crystallinity, thereby reducing the hardness of PVA, and improving the softness and thickness uniformity of the glove.

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 a chain extender composition as well as a preparation method and application thereof, the chain extender composition comprises hydroquinone dihydroxy ethyl ether and an addition component, the addition component is a reactant of hydroquinone dihydroxy ethyl ether and a lactone substance, and the lactone substance comprises one or more of a four-membered ring, a seven-membered ring and an eight-membered ring; the mass ratios of the hydroquinone dihydroxy ethyl ether and the addition component in the chain extender composition are 70 to 90 percent and 10 to 30 percent respectively; the melting point of the chain extender composition is 80-95 DEG C. The melting point of the chain extender composition is lower than that of pure hydroquinone dihydroxy ethyl ether, and the chain extender composition has a supercooling phenomenon and is slowly crystallized compared with the pure hydroquinone dihydroxy ethyl ether, so that the chain extender composition is relatively long in operation period in actual use and can effectively avoid defects in production of polyurethane elastomers. Compared with HQEE, when the chain extender composition disclosed by the invention is used for preparing a polyurethane elastomer, the physical properties of the elastomer are not obviously reduced, and even the stretching and tearing properties are improved.