866 results about "Lubricity" patented technology

There is provided a sliding component that supplies a sealed fluid to a leakage side in a gap between sliding surfaces to exhibit high lubricity and has a small leakage of the sealed fluid. A sliding component that has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine, includes a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component, each of the dynamic pressure generating mechanisms including a deep groove portion that communicates with a leakage side, and a plurality of shallow groove portions that communicate with the deep groove portion and are arranged in a circumferential direction in parallel relationship to each other.

The invention relates to a stern bearing lubrication characteristic analysis method coupled with the influence of three-dimensional vibration of a stern shaft, and the analysis method comprises the steps: S1, inputting global parameters into a bearing lubrication performance and kinetic parameter calculation module and a propulsion shaft system vertical, horizontal and torsional three-dimensional vibration calculation module, and completing the corresponding calculation; s2, obtaining a bearing transfer matrix; s3, obtaining a system transfer matrix; s4, the forced vibration calculation module completes corresponding calculation; s5, a bearing relative position feedback module completes corresponding calculation; and S6, judging whether the calculation of one work cycle is completed or not, and storing and outputting the working characteristic result of the stern shaft-stern bearing in the cycle. By designing a bearing lubrication performance and kinetic parameter calculation module and a propulsion shafting vertical and horizontal torsion three-dimensional vibration calculation module, the vibration and lubrication coupling effect between a stern shaft and a stern bearing is fully considered, and a stern shaft vertical and horizontal torsion three-dimensional vibration and stern bearing lubrication characteristic bidirectional coupling model is established. And a vibration lubrication mutual feedback mechanism under a complex vibration condition is disclosed.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The invention discloses a wind-water combined heat dissipation method and device for a hydraulic station, and relates to the technical field of hydraulic heat dissipation control. The wind-water combined heat dissipation method comprises the steps that an expected die-casting plan of a target die-casting machine is read; an expected working load is determined, temperature rise trend prediction of oil liquid of the multiple hydraulic components is carried out, and multiple predicted oil temperatures are output; performing cooling demand analysis, and determining a plurality of initial cooling temperature values; carrying out lubrication performance attenuation analysis, compensating the plurality of initial cooling temperature values, and outputting a plurality of cooling temperatures; a wind-water combined heat dissipation twin model is constructed, heat dissipation parameter simulation optimization is carried out, and an optimized heat dissipation control strategy is output; and according to the optimized heat dissipation control strategy, heat dissipation control in the cooling backflow period is conducted on the target hydraulic station. The technical problems that in the prior art, heat dissipation accuracy and practicability are insufficient, and the working quality and working efficiency of the hydraulic station are affected are solved, and the technical effects that the heat dissipation accuracy and practicability of the hydraulic station are improved, and the working efficiency and working quality of the hydraulic station are improved are achieved.

The invention discloses a circulation system of aluminum wire drawing liquid, and relates to the technical field of metal processing, the circulation system comprises: a wire drawing device, which is provided with an immersion liquid box and an outlet die, and after entering the immersion liquid box for drawing, an aluminum rod is sized from the outlet die for molding; a filter is arranged in the wire drawing liquid pool, the filter is communicated with the immersion liquid box through a circulating pipe I, the circulating pipe I is connected with a heat exchanger, and the immersion liquid box is communicated with the wire drawing liquid pool through a return pipe; the cooling system is connected with the heat exchanger through a circulating pipe II; the filter is provided with at least one continuous filtering mechanism, and the continuous filtering mechanism is configured to trigger the continuous filtering mechanism to rotate to switch a new filtering structure when the water level in the filter rises. After the water-based aluminum wire drawing liquid is adopted, no smell is generated in the circulation process, and the surrounding environment of a machine table is clean and tidy. Meanwhile, after the aluminum powder is filtered and is drawn by a nano-mold, the lubricating property is good, and the surface of the aluminum wire is smooth and clean.

The invention discloses a polymorphic graphite-carbide steel-based multiphase wear-resistant composite material and a preparation method and application thereof.The material is of a composite tissue structure of spheroidal graphite, three-dimensional coralline graphite, multiple carbides and a steel matrix, and the multiple carbides are M3C type carbides and MC type carbides. Comprising the core steps of component design, composite inoculant proportion design, smelting and inoculation treatment, subsequent heat treatment and the like, and is characterized in that synergistic precipitation of spheroidal graphite, three-dimensional coralline graphite and various and multi-size carbides is achieved through chemical component design and inoculation regulation and control; the invention further provides application of the material in high-impact, heavy-load or dry-friction working conditions of crushing or grinding equipment. The material provided by the invention has better comprehensive wear resistance under complex working conditions, has structural stability, impact resistance, lubricity and thermal stability, and has wide engineering application prospects in severe environments such as high impact, high load, dry friction and the like.

The present invention discloses a biomass-based ionic liquid-modified carbon quantum dots, a preparation method thereof, and a composite lubricant. The preparation method of the biomass-based ionic liquid-modified carbon quantum dots uses biomass raw materials, choline chloride, and amino acids to prepare carbon quantum dots and choline amino acid ionic liquid. The choline amino acid ionic liquid is used to modify the carbon quantum dots to produce a biomass composite lubricant. This uses renewable biomass resources instead of traditional petrochemical resources, is environmentally friendly, can be decomposed by nature, achieves clean production, and eliminates environmental pollution. The CQDs / ILs composite lubricant can function as "nanoballs," thereby improving its load-bearing capacity and reducing wear. In addition to having good lubricating properties, the choline amino acid ionic liquid also has good solubility. Modifying the carbon quantum dots with the choline amino acid ionic liquid not only improves the dispersibility of the carbon quantum dots but also further enhances their tribological properties.

The invention discloses a super-lubricating and corrosion-resistant DLC (diamond-like carbon) protective coating and a preparation method thereof, and belongs to the technical field of protective coatings. The coating is prepared on a base body through magnetron sputtering and magnetic filtering arc ion plating processes, a multi-layer composite structure is formed by doping transition metal elements and non-metal elements, and the multi-layer composite structure comprises a cleaning modification layer, a gradient transition layer, a combination strengthening layer, a main functional layer and a surface lubricating layer. Through element doping, the internal stress of the DLC coating is effectively reduced, the surface lubricity is enhanced, the bonding strength of the coating and a matrix is improved, and meanwhile the high hardness and excellent wear resistance of the DLC coating are reserved. In addition, the preparation process is simple, is suitable for industrial production, and can be widely applied to surface protection in the fields of molds, automobiles, aerospace and the like.

The invention discloses a bearing with stable lubricating performance, and relates to the technical field of bearing devices, the bearing comprises a static bearing and a dynamic bearing, the static bearing comprises a shell and a porous oil storage bushing, a sealing ring is arranged on one side of the porous oil storage bushing, an oil supplementing mechanism is arranged on one side of the sealing ring, and an auxiliary ring is arranged on one side of the oil supplementing mechanism; a movable bearing is arranged in the porous oil storage bushing and comprises a shearing shaft sleeve, a shaft wheel and supporting frames, the shaft wheel is arranged on the outer wall of the shearing shaft sleeve, the supporting frames are arranged on the two sides of the shearing shaft sleeve, the shearing shaft sleeve and the porous oil storage bushing are combined through the supporting frames, and one side of the shearing shaft sleeve is connected with an oil supplementing mechanism. An oil scraping plate and an oil outlet hole are integrated by rotating an oil supplementing arm, so that dynamic lubrication supply and pore self-cleaning are realized; by adopting the non-Newtonian fluid lubricant, the viscosity is improved under high-speed shearing, and the stability of an oil film under extreme working conditions is enhanced; the connecting block enables the oil supplementing system and the bearing to rotate synchronously, and self-adjusting lubricating circulation is formed.

A treadmill includes a walking board assembly, and a walking belt encircling the walking board assembly. The walking board assembly includes a support plate, a wear-resistant plate mounted on the support plate, and a wax layer mounted on the wear-resistant plate. The wear-resistant plate is made of wear-resistant material with a low friction coefficient. The wear-resistant plate has a bottom face abutting the top face of the support plate. The wear-resistant plate has a top face integrally formed with multiple grooves. The wear-resistant plate has a thickness less than that of the support plate. The wax layer is coated on and filled with the grooves of the wear-resistant plate. The wax layer has a coating height at least equal to the depth of each of the grooves.

The invention relates to the technical field of lubricating materials, and provides a super-lubricating amorphous carbon-based thin film as well as a preparation method and application thereof. The super-lubricating amorphous carbon-based thin film comprises a bonding transition layer, a carbide gradient layer and a composite hydrogen-containing amorphous carbon-based film layer which are sequentially arranged from bottom to top, the composite hydrogen-containing amorphous carbon-based film layer is a sulfide-doped hydrogen-containing amorphous carbon thin film, and sulfide is one or two of tungsten sulfide and molybdenum sulfide. The structure of the carbon-based thin film is regulated and controlled by doping a small amount of sulfide, compared with a traditional hydrogen-containing amorphous carbon-based thin film, the obtained super-lubricating amorphous carbon-based thin film shows more stable super-lubricating performance and more excellent wear resistance, a new solution is provided for surface protection of tribological parts, and the method is suitable for popularization and application. The method has important industrial application value.

The invention belongs to the field of bearing design theories, and discloses a full complement CARB bearing design method based on an elastohydrodynamic lubrication bearing model. The viscosity-pressure coefficient, the basic viscosity and the elastic modulus are integrated to oil film thickness calculation for the first time by establishing a joint objective function of the maximum dynamic load and the elastic flow lubrication minimum film thickness, and the dynamic load coefficient is adopted to correct the actual working condition deviation. A complete system containing 21 constraints is constructed, and five dimensions of geometric compatibility, contour matching, motion compensation, intensity life and manufacturing boundary are covered. The design variables including the curvature radius, the roller diameter and the pitch circle diameter are solved through a multi-objective optimization algorithm, collaborative maximization of the bearing capacity and the lubricating performance is achieved, and the problem that in a traditional design theory, curvature parameters are difficult to accurately determine is solved.

The application provides an acid ester composite diesel anti-wear agent and a preparation method thereof, and belongs to the technical field of diesel additives, and comprises the following steps: S1, preparing a silanized solid acid catalyst; S2, preparing C18 polyol ester; S3, mixing an acid type anti-wear component and the C18 polyol ester, and then stirring after heating, and then adding tetrahydropyrazole pyridine derivatives and a diluent to continue stirring, and then cooling and filtering to obtain the acid ester composite diesel anti-wear agent. The application can improve the lubricity and anti-wear performance of low-sulfur diesel at a lower additive dosage, and has low corrosion and good oxidation stability.

The invention relates to the technical field of high-end equipment design and intelligent manufacturing, and discloses a method, system and equipment for determining the lubricating performance of a sliding bearing and a medium. The method comprises the following steps: acquiring geometric parameters, working condition parameters and lubricant parameters of the sliding bearing, and establishing a Reynolds equation for describing an oil film flow field of the sliding bearing; representing a function for describing the oil film pressure of the sliding bearing through a neural network; establishing a loss function according to the satisfaction degree of the output of the neural network to the physical constraint, the boundary constraint and the load constraint of the sliding bearing; taking the eccentricity rate and the load angle of the sliding bearing as training parameters of a neural network, training the neural network by adopting a loss function, and continuously updating the training parameters in the training process; and determining the oil film pressure of each space point of the sliding bearing through the trained neural network, and determining the lubricating performance of the sliding bearing according to the determined oil film pressure and training parameters used by the trained neural network so as to overcome the solving problem of a numerical method.

The utility model relates to a high-precision smooth edge grinding machine and belongs to the field of lens grinding, the high-precision smooth edge grinding machine comprises a rack, a grinding mechanism is arranged on the upper surface of the rack, a clamping mechanism is arranged on the upper surface of the rack and located in front of the grinding mechanism, and the grinding mechanism comprises a supporting frame, a connecting frame, a rotating shaft and a smooth surface grinding disc. According to the high-precision smooth edge grinding machine, the grinding mechanism adopts a polyurethane resin grinding wheel as a smooth surface grinding disc, the polyurethane resin grinding wheel has excellent self-lubricity and wear resistance, friction and heat are reduced in the grinding process, damage to a lens is effectively avoided, burrs are changed into polishing through edge grinding, meanwhile, through combined driving of a grinding motor and a transmission belt, the grinding efficiency is improved, and the grinding efficiency is improved. According to the optical lens edge grinding device, high-speed rotation of the grinding disc is ensured, the edge grinding efficiency is improved, the cooling effect in the grinding process is further enhanced through the arrangement of a cooling water pipe and a spraying head, lens damage or deformation caused by too high temperature is prevented, the optical lens edge grinding quality is greatly improved, and the requirement for high-precision machining is met.

The utility model provides an oil circulation system and a lubrication system, the oil circulation system comprises a circulation loop connected to an oil tank, the circulation loop is provided with a first power device and a first temperature control valve, the first temperature control valve is provided with a first oil outlet pipeline and a second oil outlet pipeline to return oil to the oil tank, and the first oil outlet pipeline is provided with a first radiator. According to the oil circulation system, the circulation loop is connected to the oil tank, and the function that the lubricating medium in the oil tank circularly flows along the circulation loop is achieved through the first power device; the flow of the first oil outlet pipeline and the flow of the second oil outlet pipeline are adjusted through the valve opening degree of the first temperature control valve, adjustment of the temperature of the lubricating medium is achieved, it is guaranteed that the temperature of the lubricating medium is within the required temperature range, and then the lubricating performance is guaranteed.

The planetary plate gearbox comprises a box body, a driving gear shaft, a first gear set and a second gear set are arranged in the box body, the driving gear shaft penetrates through the top of the box body and is rotationally connected with the box body, and the first gear set and the second gear set are oppositely arranged up and down. The second gear set is in transmission connection with the first gear set and the driving gear shaft, an oil lifting device is arranged on the lower portion in the box body and connected with the first gear set, and a grinding disc is rotationally arranged below the box body and connected with the second gear set. According to the oil lifting device, the propeller blades rotate under the transmission connection of the driving gear shaft, the first gear set and the second gear set, lubricating oil in the lower shell is lifted into the upper shell in the rotating process of the propeller blades, and the lubricating oil falls into the lower shell again through the oil passing holes, so that the lubricating oil circularly flows in the box body, and the lubricating effect is improved. And heat dissipation is facilitated, and reduction of the lubricating performance caused by local overheating of the lubricating oil is reduced.

The application relates to a high-strength wear-resistant polyamide material and a preparation method thereof, and belongs to the technical field of polyamide materials. The high-strength wear-resistant polyamide material comprises the following raw materials in parts by weight: 65-80 parts of a polyamide matrix material, 0.5-1 part of a lubricating dispersant, 10-15 parts of wear-resistant master batches, 5-8 parts of modified silica sol, 10-15 parts of modified glass fibers and 0.2-0.5 parts of an antioxidant. The application combines self-lubricating property and high hardness by adding a wear-resistant agent which is chemically bonded to the polyamide matrix material, and further adds the modified silica sol and the modified glass fibers as fillers to synergistically improve the wear resistance of the polyamide, so that the polyamide material with high strength and good wear resistance is obtained by the joint action of the other components.

According to the preparation method of the non-oriented silicon steel base, a trace rare earth element Nd is added into molten steel components, nano SiO particles are introduced, continuous casting and rolling processes are improved, a separant formula is optimized, and a mixed separant of AlO and the nano SiO particles is adopted, so that the anti-oxidation, anti-bonding and lubricating properties of the surface of a steel strip are remarkably improved; the surface defects are reduced, the performance of the non-oriented silicon steel is remarkably improved, the microstructure of the non-oriented silicon steel is optimized, and the moving resistance of a magnetic domain wall is effectively reduced, so that the iron loss P17 / 50 is remarkably reduced to 0.7-1.0 W / kg, and the magnetic induction B8 reaches 1.90 T or above and is remarkably higher than the level of a traditional process.

The invention relates to the technical field of casting powder, in particular to electromagnetic ejection duplex stainless steel special casting powder which comprises the following raw materials: red mud, wollastonite, modified fluorite, borax, spodumene and blast furnace slag. The fluorite is treated through yttrium oxide modification and forsterite coating processes, release of harmful fluorine ions at high temperature is effectively inhibited, and erosion to refractory materials is greatly reduced; meanwhile, the stability of particles is enhanced through forsterite coating, and the comprehensive use effect of the casting powder is improved; in addition, the modified fluorite is beneficial for forming a slag film with better lubricity, and slag entrapment and casting blank surface defects are reduced.

The utility model relates to the technical field of electric actuators, and discloses an anti-surge electric actuator with an anti-jamming mechanism, which comprises a front control seat, the rear end of the front control seat is connected with a rear control seat, a main shaft is inserted into the top of the rear control seat, a hand wheel is mounted at the top of the main shaft, and the anti-jamming mechanism is mounted on the hand wheel. A separable sleeve shaft is installed in the rear control base, and an auxiliary worm wheel is arranged outside the separable sleeve shaft. According to the utility model, the anti-locking structure is arranged, so that the rotating motor in the rear protective cover drives the auxiliary rotating wheel and the rotating worm to rotate during use, and the rotating worm drives the auxiliary worm gear outside the separable sleeve shaft to be engaged; before and after use, grease can be injected into the oil storage box through the conveying pipe via the rubber plug at the rear end of the rear control seat, then the grease in the oil storage box is immersed into the oil absorption cotton layer and then drips between the rotating worm and the auxiliary worm gear, the lubricity between the auxiliary worm gear and the rotating worm is improved, and therefore the anti-jamming function is achieved.

The utility model provides equipment for detecting the content of a residual antioxidant in industrial lubricating oil during working, and belongs to the technical field of detection equipment. Comprising a fixing rod, a stabilizing rod clamped at the bottom of the fixing rod, a moving groove formed in an inner cavity of the fixing rod, a fixing column inserted in the center of the moving groove, an adjusting assembly arranged on the side surface of the fixing column in a sleeving mode, a rotating assembly fixedly installed on the side wall of the adjusting assembly, and a detection assembly rotationally installed on the inner surface of the rotating assembly. Through cooperative use of the adjusting assembly, the rotating assembly and the detection assembly, the content of the residual antioxidant in the industrial lubricating oil is accurately detected, the detection accuracy and reliability are improved, meanwhile, through mutual cooperative use of all the structures, on one hand, maintenance of the industrial lubricating oil is facilitated, and on the other hand, the detection efficiency is improved. And on the other hand, the stability and durability of the equipment are enhanced, so that the lubricating performance of the industrial equipment is effectively guaranteed, the service life of the equipment is prolonged, and the maintenance cost is reduced.

The invention discloses a MoS2-TiO2-polyimide composite film material and a preparation method thereof, and belongs to the technical field of polymer-based composite film materials. According to the preparation method, TiO2 nanowires are vertically grown on the surfaces of MoS2 nanosheets in an in-situ manner through MoS2-TiO2 hybridization, meanwhile, a strong heterojunction structure is constructed, a firm chemical bonding interface is formed, the excellent lubricating property of MoS2 and the excellent wear resistance and high bearing capacity of TiO2 are integrated, and functional complementation and synergistic enhancement are achieved; meanwhile, a polyimide matrix is bridged through a zinc ion coordination bond, the material is endowed with excellent mechanical strength and toughness, and due to the integrated design of lubrication, wear resistance and bearing, the material has the unique advantages of low friction coefficient, high wear resistance and high load at the same time; tests show that the MoS2-TiO2-polyimide composite film material has excellent photothermal conversion performance, mechanical property, thermal property and self-lubricating property.

The application belongs to the technical field of rust-proof aerosol, and particularly discloses a general-purpose rust-proof lubricating oil aerosol and a preparation method thereof.The general-purpose rust-proof lubricating oil aerosol comprises, in percentage by mass, 80-90% of base oil, 1-5% of film forming agent, 2-8% of rust-proof agent, 0.3-5% of lubricant and 0.1-0.5% of dehydrating agent; the base oil is composed of solvent oil D80 and mineral oil 500N in a mass ratio of (3.5-4.5):1.The aerosol can not only solve the problem of product quality affected by rust in daily life and industrial production, but also effectively solve the rust of metal materials, provide better rust-proof protection for the metal materials, increase the lubricating performance of the metal materials, and effectively dissolve the rust, adhesives and the like on the surface of the metal materials due to the excellent permeability, so that the surface of the metal materials is kept clean and bright.

A method of improving the lubricity of a diesel fuel composition, the method comprising admixing into the composition: (a) at least one ester, amide or imide compound; and (b) at least one small, functionalised aromatic compound.

The utility model discloses a casting nozzle for cast rolling of aluminum alloy and a cast rolling device. The casting nozzle for cast rolling of the aluminum alloy comprises a casting nozzle base body. The at least two graphite plates are respectively arranged on the top end surface and the bottom end surface of the first end position of the casting nozzle base body; the at least two extension parts are arranged at the first end of the casting nozzle base body and located on the two sides of the sprue gate respectively; the at least two graphite blocks are arranged on the side surface of the extension part; the casting nozzle base body is installed between the upper roller and the lower roller, in the rotating process of the upper roller and the lower roller, the graphite plate and the graphite block have good lubricity and can be abraded by friction, and therefore the casting nozzle base body and the extending part can be conveniently and fast suitable for an installation gap between the upper roller and the lower roller, use is convenient and fast, and in addition, the casting nozzle base body is convenient to install. The graphite blocks have good lubricity, friction force between the plate strip located between the two graphite blocks and the graphite blocks is small, and edge cracks of the plate strip can be eliminated.

The utility model relates to a reciprocating motion self-lubricating head ring which comprises a bottom, an outer wall, a top end, a liquid storage groove, a sand scraping wall and a plunger sealing face. A bottom matching structure matched with the contact surface of the pressure ring is arranged at the front end of the bottom; an outer wall and a plunger sealing face are arranged on the two sides of the bottom respectively. A top end is arranged on one side of the outer wall away from the bottom; a liquid storage tank for separating liquid from hard objects is arranged below the top end; a sand scraping wall used for scraping liquid containing hard objects into the liquid storage tank is arranged between the lower portion of the liquid storage tank and the sealing face of the plunger. According to the utility model, hard objects are prevented from entering the sealing surface of the plunger to tear and erode the head ring; the friction heat is reduced, and the self-lubricating property and the corrosion resistance of the first ring are improved.

The invention provides a PAMA type multifunctional lubricating additive based on carboxyl-aluminum crosslinking, a preparation method and application of the PAMA type multifunctional lubricating additive and a lubricating agent, and belongs to the technical field of lubricating materials. By means of carboxyl functionalization of PAMA, adsorption of the additive on the surface of a metal friction pair can be enhanced, generation of an interface friction film is promoted, cross-linking is conducted by introducing cross-linking sites and a cross-linking agent, and the tackifying performance and friction performance of the additive can be further improved; compared with a traditional lubricating additive which needs to be compounded by a plurality of additives to make up the limitation that a single additive has a single function, the carboxyl-aluminum cross-linked PAMA type multifunctional lubricating additive disclosed by the invention can realize function integration of a viscosity index improver and an antifriction and antiwear additive; the introduction of carboxyl not only can enhance interfacial adsorption and improve friction, but also can be used as a crosslinking site to further enhance the tackifying and viscosity-temperature properties through crosslinking, so that the lubricating oil has excellent viscosity-temperature properties and lubricating properties at the same time.

This invention belongs to the field of cutting technology and discloses a semi-synthetic cutting fluid for titanium alloys, its preparation method, and its application. The semi-synthetic cutting fluid for titanium alloys of this invention comprises the following components in parts by weight: 20-25 parts base oil, 5-15 parts alkali reserve agent, 5-10 parts rust inhibitor, 2-5 parts titanium alloy corrosion inhibitor, 20-30 parts lubricant, 3-6 parts dispersant, 3-5 parts coupling agent, 3-6 parts surfactant, 2-4 parts bactericide, and 0.05-0.2 parts defoamer. The semi-synthetic cutting fluid for titanium alloys of this invention has excellent corrosion inhibition, lubrication, defoaming, cooling, and stability properties for titanium alloys. It can be applied to the cutting process of difficult-to-machine metal materials such as titanium alloys. It not only meets the machining requirements of materials and reduces the cutting force and cutting temperature during the cutting process, but also protects the tool and workpiece from wear and burns. Furthermore, it does not contain formaldehyde-releasing materials and complies with RoHS 2.0 environmental protection requirements.

The present application belongs to the technical field of marine engine bearing bush coating, and discloses a composite treatment method for the surface of a marine heavy-duty engine bearing bush, which comprises bearing bush substrate pretreatment, electroplating treatment, electroplating post-treatment and spraying treatment. The present application breaks through the limitation of single surface treatment technology, uses a tin-nickel alloy electroplating layer as the bottom layer to provide the bearing bush with good basic strength, toughness and impact resistance, and uses a spraying layer containing solid lubricants such as molybdenum disulfide and graphite as the surface layer to endow the bearing bush with excellent compliance, embeddability and self-lubricating performance. The combination of the two perfectly solves the technical problem that the traditional process cannot simultaneously consider strength and surface performance, and is particularly suitable for the complex working conditions of frequent start-stop and power overload of marine heavy-duty engines.