155results about How to "Low friction factor" patented technology

The invention relates to high-thermal conductivity lubricating oil and a preparation method thereof. The lubricating oil contains base oil and fluorinated graphene nanosheets, wherein the weight percent of content of the fluorinated graphene nanosheets is 0.01 to 10.0 %; and the preparation method comprises the steps as follows: firstly, preparing the fluorinated graphene nanosheets; and secondly, preparing the lubricating oil containing the fluorinated graphene nanosheets. The lubricating oil provided by the invention has the advantages of excellent antifriction effect, extremely high heat conduction capability and excellent stability and dispersibility.

The invention discloses a method for preparing a hexagonal molybdenum disulfide nanosheet as an anti-friction additive. An additive-assistant hydrothermal synthesis method is adopted. The preparation method comprises the following steps: synthesizing a carbon ball from a high molecular compound as a carbon source by a Stober method; dissolving Na2MO4, Na2S and NH2OH.HCl in water to obtain a solution; adding the prepared nano carbon ball and uniformly dispersing the nano carbon ball in the solution by centrifugal stirring; adjusting the pH value of the solution to 6 to 8 with acid, and stirring the obtained solution and then moving the solution to a stainless steel reaction kettle for thermostatic reaction to obtain a reaction product; and separating the reaction product and annealing the product in a tube furnace of 400 to 600 DEG C to obtain the hexagonal molybdenum disulfide nanosheet. The preparation method is simple in process, and the prepared product is high in purity and yield, and excellent in antifriction and anti-wearing and lubricating property, and can serve as the anti-friction additive of lubricating oil and fat.

The invention discloses a large-load running rail dry-film lubricant, belonging to the single-constituent room-temperature solidification type dry-film lubricant, comprising the following constituents by weight parts: modified thermal plastic acrylic ester copolymer 30-40 parts, coupling agent 2-6 parts, nano Al2O3 0.5-4 parts, solid lubricant 55-70 parts, solvent 350-500 parts, additive 6-8 parts. The dry-film lubricant has features of good anti-friction and abrasion proofness; good extreme pressure property; no corrosion; safe use, construction and convey; accordance with environmental protection requirement; lower cost and wide application.

The invention discloses a preparation method of graphene functional lubricating oil. The preparation method comprises the following steps: S1. respectively dissolving zinc acetate and thioacetamide in water to prepare solutions; S2. mixing the zinc acetate solution and the thioacetamide solution with dialkyl dithiophosphate and hydrazine hydrate to react and then separating, washing and drying an obtained precipitate, thus obtaining dialkyl dithiophosphate modified nano zinc sulfide; S3. stirring nano graphene, nano molybdenum disulfide, nano borate and a coupling agent to mix the materials to obtain coupling agent modified nano composite powder; and S4. adding dialkyl dithiophosphate modified nano zinc sulfide obtained in the step S2 to base oil, adding the coupling agent modified nano composite powder obtained in the step S3 to the base oil, stirring the materials at a high speed at a certain temperature and then restoring the temperature to the normal temperature, thus obtaining the graphene functional lubricating oil. The prepared lubricating oil has excellent antifriction and antiwear properties and high bearing capacity and has the function of repairing worn surfaces.

The invention relates to a polytetrafluoroethylene composite material for crankshaft oil seal and a preparation method thereof. The composite material is composed of 60%-80% of polytetrafluoroethylene by mass, 8%-18% of an organic filler of aramid fiber by mass and an inorganic filler. The preparation method comprises the following steps: batching, mixing materials, pressurizing to 50-150Mpa, maintaining pressure for 10-50min, and press forming; sintering and curing the formed materials at the temperature of 350-400 DEG C for 4-8 hours; and cooling down the temperature to below 140 DEG C withthe cooling speed at 40 DEG C / h, and naturally cooling the cured materials in a furnace to room temperature to obtain the polytetrafluoroethylene composite material through aftertreatment. The oil seal obtained by the preparation method has better mechanical properties such as impact strength, tensile strength, compression strength, breaking elongation, hardness and the like; and the polytetrafluoroethylene composite material has lowered friction factors, enhanced lubricating effect and prolonged wearing life, and the material is especially suitable for the crankshaft oil seal of an automobile engine.

The invention belongs to the technical field of engineering plastics, and concretely relates to a wear-resistant nylon composite material and a preparation method thereof. The wear-resistant nylon composite material comprises, in parts by weight, 100 parts of nylon, 6-20 parts of a solid lubricant, 30-35 parts of glass fibre, 12-15 parts of teflon, 3-7 parts of silicone powder, 4-10 parts of a compatibilizer, and 1-2 parts of an anti-oxidant, wherein the solid lubricant comprises 40-70 parts of molybdenum disulfide and 30-60 parts of tungsten sulfide, is prepared by uniformly mixing the two compositions and performing ball milling in a ball mill at a rotation speed of 250-350 r / min for 6-12 h, and has the particle size of 300-400 nm.

The invention relates to a production method of a facial tissue capable of being wetted with water. The production method comprises: respectively adding water to needlebush pulp and hardwood pulp, adjusting the needlebush pulp concentration and the hardwood pulp concentration to 5.0-7.0 wt%, and crushing for 8-15 min; adjusting the needlebush pulp concentration to 4.0-5.0 wt%, and carrying out fiber cutting and fibrillation in a grinder; adding water to adjust the hardwood pulp concentration to 4.0-5.0 wt%, and carrying out fiber defibrating in a defibrating machine; mixing 50-60% of the needlebush pulp and 50-40% of the hardwood pulp, adjusting the concentration to 3.0-4.0 wt%, and carrying out further cutting and fibrillation through the grinder; adding a wet strength agent and a softener to the mixed pulp, and adjusting the concentration to 2.9-3.1 wt%; and diluting the obtained mixed pulp to 0.2-0.25 wt% by using a pulp beating pump, feeding into a papermaking machine, molding, squeezing, and drying to finally prepare the product. According to the present invention, when the prepared facial tissue used for water wiping and sweat wiping, the facial tissue is not broken, and no residue paper exists; the prepared facial tissue can be used as the wet wipe and the face washing towel after the prepared facial tissue is wetted with the water; and the hand feeling and the smoothness of the facial tissue are improved, such that the use is comfortable.

The invention provides an aramid fiber oiling agent. The aramid fiber oiling agent comprises, by weight, 92-82% of a lubricating agent, 3-10% of a bundling agent, 5-8% of a composite antistatic agent, and the balance is an annexing agent. The lubricating agent is fatty acid sebacate. The aramid fiber oiling agent has the good antistatic property in various humidity conditions, corrosion is not likely to happen, the requirements for reducing of fiber corrosion and enhancing of composite performance of fibers and rubber of aramid fibers with various standards in the spinning procuding or secondary processing process can be met, the aramid fiber quality can be effectively improved, and continuous processing quality can be effectively improved.

The invention discloses a laser preparation method of a titanium-nitride-coating-contained textured surface of titanium alloy. According to the laser preparation method of the titanium-nitride-coating-contained textured surface of the titanium alloy, firstly, surface pretreatment is conducted on the titanium alloy; and then, under the conditions of heating, temperature keeping and the N2 atmosphere, laser texturing is conducted on the surface of the titanium alloy, and meanwhile laser gas nitriding treatment is conducted. The laser gas nitriding technology and the laser surface texturing technology are combined, the titanium-nitride-coating-contained textured surface is prepared on the surface of the aluminum alloy, and the titanium-nitride-coating-contained textured surface have both the advantages of high hardness and chemical stability of the titanium nitride coating and the advantage of the small surface friction coefficient of the textured surface. The method is simple, operation is easy and convenient, the prepared surface texture is stable and controllable in dimension and free of macroscopic cracks and other defects, generated titanium nitride crystal particles are fine and uniform in distribution, and the wear resistance and corrosion resistance of the surface of the titanium alloy are greatly improved.

The invention relates to a hot-pressing preparation method for hexagonal boron nitride-added silicon nitride. The preparation method comprises the following steps: adding hexagonal boron nitride having a laminar structure as a solid lubricating agent to silicon nitride, and mixing; meanwhile, adding a sintering aid and carrying out ball grinding; pouring alcohol to adjust the viscosity of fluid; then putting the ball-ground powder to a drying oven, heating, drying by steaming and sieving; then loading the powder to a die, and pre-pressing to form a biscuit; carrying out temperature preservation and pressure preservation in a vacuum carbon tube furnace; finally, reducing the temperature of the vacuum carbon tube furnace to room temperature, and taking sintered silicon nitride composite ceramic out. According to the preparation method disclosed by the invention, boron-containing oxides and hydroxides are generated by means of a chemical reaction between the hexagonal boron nitride and water molecules, so that the siding surface of a material has a lubricating property per se, and thus the tribological property of the silicon nitride ceramic material is remarkably improved, namely the friction factor of the silicon nitride ceramic material is remarkably reduced; the silicon nitride composite ceramic produced by hot-pressing sintering has the characteristics of good self-lubricating and tribological properties and can meet the using demands in actual engineering.

The invention relates to a method of processing the surfaces of light alloy, in particular to a method of processing the surfaces of aluminium alloy pistons and precision friction pairs. The method comprises the steps that (1) washing is performed; (2) oxidization is performed; (3) hole plugging is performed. Nanoscale metal matrix ceramic oxidation film layers with the density up to the standard are respectively grown on the aluminium alloy pistons and precision friction pairs processed in the method, the density is increased, the diameters of blind holes are decreased obviously, nanometer penetrant blind holes are sealed, roughness is reduced, the friction coefficient is reduced, and the geometric dimensions are unchanged basically. The aluminium alloy pistons and precision friction pairs processed in the method can be installed for use in a matched mode without finish machining, industrial mass production can be achieved, and the method reduces production cost greatly compared with original technical methods.

The invention discloses a preparation technology of a chemical plating Ni-P-PTFE composite coating, and belongs to the technical field of metal surface treatment. The preparation technology comprises the following steps: (1) a low-carbon steel heat exchange surface is subjected to preliminary treatment; (2) Ni-P-PTFE composite coating liquid is prepared, and a Ni-P-PTFE composite coating is prepared on the low-carbon steel heat exchange surface by employing the prepared Ni-P-PTFE composite coating liquid; and (3) the microbial fouling inhibition and alleviation performances of the Ni-P-PTFE composite coating are evaluated. The abrasive resistance and the drainage effect of the surface of the Ni-P-PTFE composite coating can be improved effectively, so that the Ni-P-PTFE composite coating can adapt to multiple complex environments. The form and stable Ni-P-PTFE composite coating is formed on a Q235 carbon steel base material, a plating solution is stable in a plating application process, and the uniform and stable Ni-P-PTFE composite coating can be obtained nearly without mixing.

The invention provides a quantified and axial plunger pump. The plunger pump is a radial flow distribution pump and comprises a transmission shaft, a cylinder, a flow distribution sleeve, a flow distribution shaft and an inclined disc, wherein the transmission shaft is driven by external force to rotate, the cylinder, the flow distribution sleeve and the flow distribution shaft are connected with the transmission shaft, and the inclined disc enables the plunger pump to output fluid in a quantified mode. The cylinder, the flow distribution sleeve, the flow distribution shaft and the transmission shaft are coaxially arranged. Compared with a traditional radial plunger pump, the plunger pump has the main advantages of being simple in structure, small in size and light in weight; compared with a traditional axial plunger pump, the plunger pump has the main advantages that the rotation speed of the pump can be substantially increased, working pressure can be substantially increased, the nominal flow rate can be multiplied, or at equal working pressure, the volume efficiency of the pump is remarkably improved, and noise can be lowered by more than10 db.

The invention relates to the technical field of robot deceleration and discloses an internal oblique teeth built-up crankshaft type RV speed reducer of an industrial robot. The speed reducer comprises a left rigid disc, a right rigid disc, an internal cycloid gear ring, a cycloid wheel, an internal cycloid component of a crankshaft, and a planet component, wherein the planet component comprises a sun gear and a planet gear; the speed reducer is characterized in that a planet shaft is connected with eccentric sleeves to form a double- eccentric built-up crankshaft; a tumbler bearing is a zinc base alloy sliding bearing, a spiral oil groove is formed in the excircle of the tumbler bearing, and the axial length is 5-10 mm longer than the cycloid wheel; the eccentric sleeves are connected with a planet shaft internal inclined gear pair; an internal inclined gear ring adopts plasticity precision forming and has the phase fine tuning function; one side of a first eccentric sleeve is propped against a second elastic collar, and a spring is positioned between the other side of the first eccentric sleeve and a second elastic collar; and a second eccentric sleeve is arranged between a first elastic collar and the second elastic collar on the planet shaft. The internal oblique teeth built-up crankshaft type RV speed reducer has the following beneficial effects: assisted by the eccentric sleeves and the planet shaft internal inclined gear pair, the double- eccentric built-up crankshaft ensures phase difference precision; the zinc base alloy sliding bearing can carry out self-lubrication; and the cost is reduced by 60-75% for the general manufacturing precision.

The invention discloses a preparation method of a microarc oxidation-tungsten dioxide self-lubricating composite ceramic layer. Sodium silicate, sodium hexametaphosphate, ammonium metavanadate and an anionic dispersing agent are mixed and dissolved to obtain mixed solution; thio-ammonium tungstate performs ultrasonic water bath dissolving by de-ionized water, is added with a wetting agent, and is added in the mixed solution; the ultrasonic wave and the mechanical stirring effect are synchronously applied, so that added reagents are fully dissolved and dispersed to prepare electrolyte containing WS42-; a circulating cooling water device is started; a pretreated metal sample is connected to an electric conducting rod to dip in the electrolyte as an anode; a stainless steel electrolytic cell also serves as a cathode; a microarc oxidation power supply is started for microarc oxidation; and then, the drying is performed to obtain the microarc oxidation-tungsten dioxide self-lubricating composite ceramic layer. The prepared ceramic layer is smooth in surface, uniform in thickness, high in compactness and firm in combination with a basal body, has such prominent advantages as low friction factor and wear rate and excellent self-lubricating performance, and satisfies actual application requirements.

The invention belongs to the technical field of metal impregnation, and particularly relates to a slurry chromium impregnation permeating agent slurry and chromium impregnation layer preparing method. The method is used for preparing a permeating layer capable of improving surface corrosion resistance, wear resistance and high-temperature resistance performance of a metal material product. The method comprises the steps that a protecting sleeve is used for the non-permeating-layer portion of a cleaned part for protecting, and therefore the portion cannot be coated with permeating agent slurry; the portion, required to be subject to chromium impregnation, of the part is evenly coated with the permeating agent slurry, and the thickness of a coating layer ranges form 1.5 mm to 2.0 mm; after the coating layer is dried, the part is subject to chromium impregnation in a vacuum tank under the protection atmosphere protection, in the chromium impregnation process, the heat preservation temperature ranges from 1040 DEG C to 1090 DEG C, the heat preservation time ranges from 5 h to 10 h, furnace cooling to the temperature below 300 DEG C is carried out, and during furnace cooling, the pressure is 0.5 to 1.0 time of the standard atmospheric pressure. Metallurgical bonding is achieved, it is ensured that the coating can be tightly combined with a base body and is not prone to falling off, the depth of the prepared chromium impregnation layer ranges from 0.005 mm to 0.020 mm, and the chromium impregnation surface shows the silver gray.

The invention discloses a NiCr / Cr3C2 / WS2 self-lubricating wear-resistant coating. A laser cladding technology is used for preparing a NiCr / Cr3C2 wear-resistant coating and a NiCr / Cr3C2-30%WS2 wear-resistant self-lubricating coating on a 0Crl8Ni9 stainless steel substrate, and the cladding coating supplemented with WS2 mainly comprises Cr7C3, a (Cr, W) C carbide reinforced phase, a gamma-(Fe, Ni) / Cr7C3 eutectic toughening phase, WS2 and a CrS lubricating phase. With the temperature rise, The two coatings are both reduced in friction factor and increased in wear rate. At room temperature and 300DEG C, the coating supplemented with WS2 has better antifriction and wear-resistant performance due to the effect of the lubricating phase. At 600 DEG C, the wear rates of the two coatings are prominently increased due to the reduction of the strength of hard phases of carbides in the coatings.

The invention belongs to the technical field of sliding bearings, and discloses a whole working condition composite-structure sliding bearing. The sliding surface of the sliding bearing is provided with a triple composite texture; the three-layer composite texture comprises pit sets which are uniformly distributed in the sliding surface of the sliding bearing, and each pit set comprises a first pit, a second pit and a third pit; the first pits have the characteristics of being small in diameter and large in depth, and are suitable for the low-speed heavy-load working condition and capable of achieving the noise lowering and vibration reducing effects; the second pits have the characteristics of being large in diameter and small in depth, and is suitable for high-speed low-load working condition and capable of enabling the bearing to be in the dynamic pressure lubricating state more easily; and the third pits have the characteristics of being moderate in diameter and depth, is suitable for the medium-speed medium-high-load working condition and is used for transiting the suddenly-changed working condition within a short time and stabilizing the working state. According to the whole working condition composite-structure sliding bearing, the reasonable triple composite texture is designed on the sliding bearing, accordingly, the comprehensive performance of the sliding friction pair structure is improved, the friction coefficient and the wear rate are effectively decreased, oil film forming is accelerated, the carrying capacity and the abrasion resistance are improved, and the service life is prolonged.

The invention discloses a diamond-like carbon membrane piston ring and aims to provide the diamond-like carbon membrane piston ring which is better than an existing piston ring in aspects of abrasive resistance, elasticity, and bonding strength between a diamond-like carbon membrane layer and a base piston ring material. A multi-layer type interlayer is sequentially bonded on the outer layer of the base piston ring material, and a diamond-like carbon membrane is covered on the outer periphery of the interlayer. The diamond-like carbon membrane piston ring is characterized in that the interlayer comprises a chromium nitride layer and a titanium carbide layer which are sequentially bonded on the outer sphere of the base piston ring material. A transition structure with a hardness gradient gradually increasing from the core to the surface of the piston ring enables the surface of the piston ring to have high hardness, especially have great elasticity and higher bonding strength with the base material, so that great low-abrasion speed and low-friction factor are realized, and the diamond-like carbon membrane piston ring meets requirements of environmental protection and is long in service life.

The invention relates to a preparing method for a TiC matrix steel base steel bond hard alloy. The preparing method includes the following steps that titanium carbide powder and matrix steel matrix powder are weighed according to the proportion, alloy powder is put into a ball grinding machine to be mixed and smashed, added absolute ethyl alcohol is a process control agent, and the wet mixed powder is put into a vacuum drying box to be dried after ball grinding and is used for standby use after drying; an organic monomer and an initiator are added into a solvent to prepare pre-mixed liquid; an additive improving slurry fluidity and dispersity is added; a catalyst and a pH modifier are added and are evenly stirred, and slurry is obtained; and the slurry is injected into an injection and coagulation die, vacuum suction or vibration gas removing is conducted, after the slurry is cured to be formed, a blank is put into the vacuum drying box to be dried, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and the steel bond hard alloy is prepared. The preparing method has the beneficial effects that the technology is simple, the cost is relatively low, and parts large in size and complex in shape are easy to prepare on the basis that the macro performance of the steel bond hard alloy is ensured.

The invention relates to the field of die holders, in particular to a rolling ball type die holder. The rolling ball type die holder comprises an upper die holder body and a lower die holder body, and is characterized in that the upper end of the upper die holder body is provided with a pressing block, two guide pillars are arranged between the upper die holder body and the lower die holder body, the upper portion of each guide pillar is sleeved with a guide sleeve, a retainer is arranged between each guide sleeve and the corresponding guide pillar, each retainer is connected with the corresponding guide pillar, rolling balls are arranged in each retainer, the side faces of the rolling balls make contact with the outer surfaces of the corresponding guide pillars and the inner surfaces of the corresponding guide sleeves, the lower ends of the rolling balls in each retainer are provided with a spring, the lower ends of the springs make contact with the upper surface of the lower die holder body, the upper ends of the springs make contact with the lower ends of the corresponding retainers, a groove is formed in the outer surface of each guide sleeve and located at the lower end of the upper die holder body, the lower end of the upper die holder body is provided with a plurality of pressing plates, each pressing plate is provided with a boss, the bosses are arranged in the grooves, and the pressing plates are connected with the upper die holder body and the lower die holder body through screws. The rolling type die holder is convenient to use and long in service life, and the guide pillars and the guide sleeves are convenient to replace.

The invention discloses an anti-shock and wear-resistant self-lubricating material based on polyketone, a composite board and a preparation method of the composite board. The anti-shock and wear-resistant self-lubricating composite board comprises a base board, a sintering layer and an anti-shock and wear-resistant self-lubricating layer. The anti-shock and wear-resistant self-lubricating materialbased on polyketone is prepared from, in percentage by weight, 45%-79.8% of polyketone, 5%-15% of anhydride grafted modified polyethylene, 5%-20% of glass fiber, 5%-15% of inorganic filler, 0.1%-5% of a lubricant and 0.1%-3% of an antioxidant. The glass fiber subjected to vacuum sintering treatment is mixed with the inorganic filler, polyketone, anhydride grafted modified polyethylene and the lubricant, multiple regular or irregular pores penetrating through the sintering layer are formed in the sintering layer, and the pores account for 15%-25%. The anti-friction performance of polyketone isimproved and excellent wear resistance of polyketone is fully played, so that the self-lubricating composite board with excellent performance is prepared.

The invention discloses a composite coating which comprises a bottom layer and a coating body. The bottom layer comprises 0.12-0.15wt% of C, 2wt% of Ni, 11-13wt% of Cr, 0.9-1.2wt% of Si, 0.9-1.3wt% of B and the balance Fe. The coating is a composite material of WC-10Co-4Cr and MoS2. The weight percentage of the MoS2 is 10-20%. Abrasion resistance of the material is obviously improved through the composite coating. When the weight percentage of the MoS2 in the coating layer is 15%, the friction coefficient of the composite coating is minimum and ranges from 0.3 to 0.35.

The invention provides a pressure device and method for a thin-walled powder metallurgy shaft sleeve. The device comprises a template, wherein a lower die is fixed on the template. The device is characterized in that a pressing die is fixed in the lower die; an inner hole in the pressing die is the same as the excircle of the powder metallurgy shaft sleeve; a core rod is mounted in the center of the pressing die; the excircle of the core rod is the same as an inner hole in the powder metallurgy shaft sleeve; the inner hole in the pressing die and the excircle of the core rod are combined to form a die cavity for pressing of the powder metallurgy shaft sleeve; an ejecting sleeve for pushing out the powder metallurgy shaft sleeve is arranged on the excircle of the core rod; the lower end of the ejecting sleeve is connected with an ejecting device capable of moving up and down; an upper punch connected with a punch press sliding block is arranged above the die cavity; the front end of the upper punch takes the shape of a circular tube matched with the die cavity; a powder feeding pipe for a power metallurgy material is arranged above the die cavity, and can move left and right; a material pushing plate is connected with the front end of the powder feeding pipe; when the powder feeding pipe moves to the die cavity, the material pushing plate pushes the powder metallurgy shaft sleeve to move out of a punching area; a graphite powder material is added into the power metallurgy material, and the weight of the added graphite powder material accounts for 1-2% of the total weight.

The invention discloses a method for modifying a water-based lubricating fluid with wood flour-soybean lecithin. The method comprises the following steps: putting wood flour into a high-speed mixer, adding KH550 for treatment, adding a potassium hydroxide solution, stirring, standing, washing with water to neutrality, drying, and pulverizing to obtain composite modified wood flour; heating soybeanlecithin, introducing nitrogen gas, stirring, adding lactic acid and hydrogen peroxide, and reacting at constant temperature to obtain hydroxylated modified soybean lecithin; adding dispersing agentlauryl sodium sulfate into deionized water, heating, stirring and dissolving, adding antirust agent triethanolamine, antifoaming agent dimethicone, the composite modified wood flour and the hydroxylated modified soybean lecithin under thermal insulation conditions, carrying out strong stirring, adjusting the pH value, adding ferrous carbonate, polyhydroxylation modified graphene oxide and surfacemodified carbon fibers, carrying out strong stirring for surface modification and dispersion, and carrying out ultrasonic oscillation in a water bath to obtain the water-based lubricating fluid.

The invention relates to a high-dispersity nano molybdenum disulfide water-based rolling fluid and a preparation method thereof. Nano molybdenum disulfide with the particle size smaller than 50 nm, sodium polyacrylate and sodium hexametaphosphate are selected as a surface modifier and a dispersing agent, benzotriazole, sodium dodecyl benzene sulfonate, triethanolamine, sodium molybdate and trisodium phosphate are compounded to serve as an anti-rust agent, water-based boric acid ester and polyvinylpyrrolidone are used as extreme pressure agents, and deionized water is added to form the water-based nano rolling liquid with high dispersity and lubricating property. The novel molybdenum disulfide water-based nano rolling liquid is adopted to replace a traditional oil-in-water (O / W) emulsion, the development direction of energy conservation, consumption reduction, clean production and environmental protection of current metallurgical enterprises is better met, and the overall level of the steel industry in China can be improved.

The invention discloses a manufacturing method for austenitic stainless steel surface modification. According to the manufacturing method, a metal material is modified through the manufacturing methodof high-pressure grinding material water jet-ionitriding composite treatment, and surface strengthening is carried out; even though the roughness of the surface of the metal material is increased after high-pressure grinding material water jet-ionitriding composite treatment is adopted, due to the fact that the surface of the treated metal material is machined and hardened, the plastic deformation resistance is improved, the hardness of the metal material is improved, a groove structure is formed on the surface, and a certain collecting function is achieved on grindings in the friction process; the friction coefficient of the metal material is kept stable all the time, and the surface has a good wear resisting and wear reducing function after being treated by the manufacturing method of high-pressure grinding material water jet-ionitriding composite treatment. The metal adopting high-pressure grinding material water jet-ionitriding composite treatment is light in wear trace, and the wear trace is uneven. The metal hardness is improved after nitriding treatment, high-hardness grindings can be generated in the in the friction process, the grindings are further refined to form grains, abrasion is increased, and therefore the friction coefficient is increased. It shows that high-pressure grinding material water jet-ionitriding composite treatment is adopted, a modified layer has agood protection function on a metal material matrix, and the bearing capacity and abrasive resistance of the metal material are improved.

The present invention belongs to the technical field of cutting tools, and in particular relates to a method for preparing a layered ceramic tool based on a shock wave conduction theory. The tool is prepared from raw materials of alumina, titanium boride, tungsten carbide cobalt and magnesium oxide. The method is characterized in that a micro-laminated layer comprises 78-83% of Al2O3 + 15-20% of TiB2 + 1-2% of MgO, and has a thickness of 100mu m, a matrix layer comprises 30-40% of Al2O3 + 60-70% of WC-Co, and has a thickness of 500mu m, the raw materials are weighed according to the ratio of 78-83% of Al2O3 + 15-20% of TiB2 + 1-2% of MgO of the micro-laminated layer and 30-40% of Al2O3 + 60-70% of WC-Co of the matrix layer by mass by use of an electronic scale, deionized water as a mediumand the alumina as grinding balls are used for planetary intensive ball milling for 150-200h, and the mixture is dried under vacuum, and sieved with a 200-mesh sieve. The mass of each matrix layer andthe mass of each micro-laminated layer can be calculated according to the mixed theoretical density and thickness of the micro-laminated layer and the matrix layer and the inner diameter of a graphite mould, a powder pressing machine is used for pressing the micro-laminated layer and the matrix layer, the micro-laminated layers and the matrix layers are placed in the graphite mould in turn (the number of the layers is 21), a vacuum hot pressing sintering process is used, temperature is 1600-1700 DEG C, pressure is 28-35MPa, and holding time is 25-30min. The layered ceramic tool prepared by the method can be widely used in the processing of difficult-to-process materials such as austenitic stainless steel, cold working die steel, martensitic stainless steel and so on.

The invention relates to the technical field of cutters, in particular to a preparation method of a high-strength and high-toughness titanium alloy material cutter. The preparation method comprises the following steps that S1, raw materials are prepared; S2, punching is carried out, wherein the prepared titanium alloy materials are fed into a punching workshop for cutting, and a cutter blank is cut according to the size of the cutter, and the size and the thickness of a cutter sample; S3, heat treatment is carried out, and specifically heat treatment is carried out on the cut cutter blank; S4,surface hydrogen permeation is carried out; and S5, film coating is carried out, wherein a Ti-DLC film is plated on the surface of the cutter blank by using a magnetron sputtering method, microporesin the DLC film layer are plugged through fluorine-containing acrylate monomers, so that the wear resistance of the cutter is improved, the toughness of a substrate is not reduced, the coating has a fine structure, so that the compressive stress is produced inside the coating, the anti-crack propagation capability is high, and the service performance of the cutter is improved.