288results about How to "High surface hardness" patented technology

The invention discloses a method for improving the high-cycle fatigue performance of a Ti6Al4V titanium alloy, and belongs to the technical field of metal material processing, and the method comprises the following steps: S1, determining shot peening strengthening parameters based on material performance parameters and related standards; according to the method, high-amplitude residual compressive stress is introduced through shot peening strengthening, the stress state of the surface and the depth direction of the material is changed, accordingly, crack extension can be restrained, the fatigue life is prolonged, in addition, a plastic deformation layer is induced to be generated under the surface depth in the shot peening process, the microstructure of the material is improved, and the anti-fatigue performance of the material is improved; through femtosecond laser shock, surface defects can be effectively removed, the surface compactness can be improved, microcracks can be reduced, and a refined grain structure can be generated, so that the strength and toughness of the material are further enhanced, the high-cycle fatigue performance of the material is further improved, the two are combined, the residual stress state is optimized, and the surface integrity is improved. The fatigue performance of the Ti6Al4V titanium alloy is remarkably improved.

The invention discloses a super-wear-resistant super-hydrophobic coating in the technical field of coatings, the super-wear-resistant super-hydrophobic coating comprises a primer and a finishing coat, the primer comprises solvent-free aliphatic polyether polyol resin, micro-powder particles, di-tetratoluene diisocynate, fumed silica nanoparticles and a primer magnetic attraction material; the finishing paint comprises hydrophobic nanoparticles, a diluent, a finishing paint magnetic attraction material and a hydrophobic treatment agent, the primer magnetic attraction material is ferrite powder, and the finishing paint magnetic attraction material is nickel powder. The preparation method comprises the following steps: 1, preparing the primer; secondly, primer is sprayed; step 3, roughening the primer; 4, finish paint is manufactured; step 5, spraying finish paint; and step 6, detecting the performance of the coating. The preparation method is scientific and reasonable, the uniformity and stability of the coating in the preparation and coating process are ensured by optimizing the composition of the coating material, improving the preparation process and introducing a magnetic suction device, and therefore the wear resistance, hydrophobicity and adhesive force of the coating are improved.

The invention relates to the technical field of aluminum alloy material pressure processing, in particular to an aluminum alloy material for preparing a steel-aluminum composite strip and a preparation method thereof.The aluminum alloy material comprises a steel layer and an aluminum alloy layer, and the aluminum alloy layer comprises, by mass, 100 parts of silicon (Si), iron (Fe), copper (Cu), manganese (Mn), magnesium (Mg), zinc (Zn) and the balance aluminum and inevitable impurity elements. According to the method, through the laser interface activation and ultrasonic-assisted rolling technology, the interface bonding degree and the microstructure of the steel-aluminum composite material are remarkably improved, and the stability of the steel-aluminum composite material at the high temperature is optimized. And microalloying elements such as scandium (Sc) are introduced, so that the mechanical property and the corrosion resistance of the material are enhanced. The service life is prolonged through a special high-temperature-resistant coating and an accurate heat treatment process, and the surface hardness and corrosion resistance are improved. The advanced processes ensure high performance and high quality of the composite material, and meet the requirements of high temperature and special environments.

The invention provides a thermoplastic resin composition as well as a preparation method and application thereof. The thermoplastic resin composition is prepared from the following components in parts by weight: 10 to 40 parts of acrylonitrile-butadiene-styrene resin material, 30 to 70 parts of polymethyl methacrylate, 1 to 10 parts of modified hollow ceramic microbeads and 1 to 20 parts of toughening agent, the modified hollow ceramic microbeads comprise hollow ceramic microbeads modified by a coupling agent and stearate. The thermoplastic resin composition disclosed by the invention has the advantages of excellent wear resistance, good sound insulation effect and high surface hardness and impact strength.

The invention belongs to the technical field of modification of ultra-high molecular weight polyethylene, and particularly relates to special resin for a modified ultra-high molecular weight polyethylene lining oil pipe and a preparation method of the special resin. The special resin for the modified ultra-high molecular weight polyethylene lining oil pipe is prepared from the following raw materials in parts by mass: 65 to 80 parts of ultra-high molecular weight polyethylene, 5 to 10 parts of high-density polyethylene, 8 to 12 parts of modified polyaryletherketone, 4 to 7 parts of modified hyperbranched polyester, 0.3 to 2 parts of silicone master batch and 0.1 to 0.5 part of antioxidant. The lining oil pipe prepared from the special resin for the modified ultra-high molecular weight polyethylene lining oil pipe has excellent wear resistance and high temperature resistance, and also has good mechanical properties such as tensile strength and impact strength.

The invention relates to the technical field of composite boards, and discloses a scratch-resistant PE composite board and a preparation method thereof. The PE composite board is prepared by taking high-molecular-weight polyethylene, low-density polyethylene and medium-density polyethylene as main raw materials, adding functional aids such as a reinforcing filler, a modified polyurethane elastomer and molybdenum disulfide, and carrying out processes such as banburying, hot press molding and cold press molding. Due to the addition of the reinforcing filler, the mechanical property and the surface hardness of the matrix are improved, and the scratch resistance is further improved; the modified polyurethane elastomer is introduced into the matrix as a toughening component, so that not only is the toughness of the matrix improved, but also the scratch resistance of the matrix is improved; due to introduction of molybdenum disulfide, the unique layered structure of molybdenum disulfide can be utilized, the friction coefficient of the matrix is reduced, and then the scratch resistance of the matrix is improved.

The invention belongs to the technical field of material preparation, and aims to solve the problem that the comprehensive performance of a material is affected by non-uniform microstructure of the material due to the fact that the distribution and grain size of each phase in a metal ceramic matrix are difficult to accurately control in the conventional preparation process of the metal ceramic material. Therefore, the invention provides the preparation method of the fiber-reinforced metal ceramic material, and the preparation method comprises the following steps: pretreating silicon carbide fibers; mixing and grinding the titanium metal powder and the silicon carbide ceramic powder according to a preset proportion; adding silicon carbide fiber particles and putting the mixture into an ultrasonic mixer; adding a dispersing agent and a binding agent and mixing again; sequentially carrying out cold isostatic pressing molding and hot pressing molding on the mixture; and sequentially carrying out pre-sintering, high-temperature sintering, cutting and surface treatment on the obtained green body. The strength, toughness, hardness, high temperature resistance, wear resistance and corrosion resistance of the prepared metal ceramic material are remarkably improved, the high-performance requirement of the aviation field can be better met, and powerful support is provided for the aviation industry.

The present invention relates to a floor, in particular to a double-layer composite floor and a preparation method thereof; belonging to the technical field of floor manufacturing. It comprises a hard core layer and an elastic surface layer, wherein the elastic surface layer covers the hard core layer at least on the upper surface and part of the side surface of the floor; and a matching structure is formed between the hard core layer and the elastic surface layer; the matching structure comprises a plurality of unit elements formed on the surface of the hard core layer and a plurality of corresponding elements formed on the surface of the elastic surface layer; the unit element is a strip structure with a convex or concave cross-section arranged along the length direction of the floor. The present invention arranges a matching structure between the elastic surface layer and the hard foam core layer, so that the elastic surface layer is firmly covered on the hard foam core layer, so that the present invention has the advantages of both the hard foam core layer and the elastic surface layer, and has high compressive strength and good surface contact.

The invention relates to the technical field of surface engineering, in particular to a method for depositing a W / WCx coating on the surface of stainless steel and a stainless steel product prepared through the method. The method comprises the following steps: S1, depositing a metal transition layer on the surface of a stainless steel substrate; s2, performing diffusion heat treatment on the stainless steel substrate deposited with the metal transition layer in inert gas at 550-800 DEG C; s3, a pure tungsten layer is deposited on the surface of the metal transition layer obtained after diffusion heat treatment; and S4, depositing a W / WCx composite coating on the surface of the pure tungsten layer. The metal composite coating is deposited after the plating layer is subjected to diffusion heat treatment, the surface hardness of the stainless steel can be remarkably improved, and the hardness value of the stainless steel can be four times or above that of traditional stainless steel; the binding force of the metal transition layer and the stainless steel substrate is larger than 120 MPa, the tungsten-containing coating can be effectively prevented from cracking, and the risk of coating stripping is avoided.

The invention relates to a surface strengthening method for improving the rotary bending fatigue strength of shaft steel, which comprises the following steps: step 1, pretreatment: carrying out finish machining on the shaft steel, polishing the shaft steel with abrasive paper, then cleaning a sample with acetone and absolute ethyl alcohol solvents to remove oil stains and impurities on the surface, cleaning the sample with an ultrasonic cleaning machine, and air-drying the cleaned sample; and 2, electric pulse auxiliary ultrasonic surface rolling treatment is conducted, the sample is clamped on a lathe, currents are connected to the two ends of the sample through a pulse power source, technological parameters are set, lubricating oil is adopted for lubrication in the rolling process, the surface of the sample is machined for multiple times, and the surface-strengthened shaft steel sample is obtained. According to the method, a gradient plastic deformation layer, a hardened layer and a residual stress layer are introduced by adopting a mode of treating the surface of the shaft steel through electric pulse-assisted ultrasonic surface rolling, so that the expansion of cracks can be obviously inhibited, and the rotary bending fatigue strength of a sample can be effectively improved while the surface hardness and the residual stress are improved.

The invention discloses a titanium alloy material cutting tool and a machining method, and the machining method comprises the following steps: proportioning a hard phase WC, a binding phase and an additive according to a ratio, carrying out ball milling, spray drying and compression molding to obtain a tool blank, carrying out segmented sintering treatment, machining and molding to obtain the cutting tool, and then carrying out heat treatment to obtain the titanium alloy material cutting tool. Sequentially carrying out electromagnetic coupling strengthening treatment and surface coating plating treatment to form a TiN layer, a CrAlN layer, a CrAlSiN layer and a CrAlBN layer; the titanium-based alloy powder is added into the binding phase, so that the high-temperature strength, the heat resistance and the lightweight characteristic of the cutting tool can be enhanced; the modified CeO2 can improve the microstructure uniformity, the interface bonding force and the oxidation resistance of the cutter, so that the density and the crack resistance are improved; electromagnetic coupling strengthening treatment and multi-layer coating deposition treatment are carried out on the cutting tool, the hardness, wear resistance, oxidation resistance and high temperature resistance of the surface of the tool can be remarkably improved, and meanwhile coating stripping is effectively prevented.

The invention discloses a carbon-oxygen corrosion resistant coating powder material and a preparation method of a carbon-oxygen corrosion resistant coating, and belongs to the technical field of advanced materials.The chemical composition of the coating powder material comprises 21-24 wt.% of Cr, 7-10 wt.% of Mo, 3-5 wt.% of Nb, 2-4 wt.% of Co, 1-2 wt.% of W, 0.4-0.7 wt.% of Ti, 0.1-0.3 wt.% of Si, 0.05-0.10 wt.% of B and the balance Ni. The coating powder material forms a coating on the surface of a base body through a laser cladding technology, and the coating is prepared from the carbon-oxygen corrosion resistant coating powder material and the preparation method of the carbon-oxygen corrosion resistant coating. The surface hardness, the corrosion resistance and the wear resistance of the supercritical CO2 hot-end equipment material are greatly improved, the coating and the base material are in metallurgical bonding, the internal structure of the coating is compact, the penetration defect does not exist, the maximum size of the healable microdefect is larger than or equal to 200 microns, and the residual compressive stress is larger than or equal to 800 MPa; the weight gain of a laser deposition layer is smaller than or equal to 0.03 mg / cm < 2 > after 1000 hours in a supercritical CO2 static environment of 650 DEG C / 20 MPa, the weight change of the laser deposition layer is smaller than or equal to 0.05 mg / cm < 2 > after 1000 hours in a high-flow-rate dynamic environment of 10 m / s, and the laser deposition layer can be applied to manufacturing of key parts of energy equipment such as nuclear power equipment.

A gradient multilayer nano Ti (C, N)-based metal ceramic and a preparation method thereof relate to the field of powder metallurgy, and the method comprises the following steps: S1, mixing 64.9% by mass of titanium carbonitride, 23% by mass of tungsten carbide, 8% by mass of cobalt, 4% by mass of molybdenum carbide and 0.1% by mass of graphene nanosheets to obtain mixed powder I; mixing 60.9% of titanium carbonitride, 23% of tungsten carbide, 8% of cobalt, 8% of molybdenum carbide and 0.1% of graphene nanosheets to obtain mixed powder II; and S2, the mixed powder I and the mixed powder II are added into a mold layer by layer, three layers of mixed powder with the surface layer being the mixed powder II layer and the core layer being the mixed powder I layer are obtained, spark plasma sintering is carried out, and the gradient multi-layer nano Ti (C, N)-based metal ceramic is obtained. According to the Ti (C, N)-based metal ceramic and the preparation method thereof, different molybdenum carbide mass proportions of the surface layer and the core layer are controlled, a hard phase enrichment area is formed on the surface layer, a binding phase enrichment area is formed on the inner core part, the Vickers hardness can be improved through hard phase enrichment, the fracture toughness can be improved through binding phase enrichment, and therefore the Ti (C, N)-based metal ceramic with the hardness and the fracture toughness is obtained.

The invention relates to the technical field of superhard composite materials, in particular to a manufacturing method of a superfine diamond compact, which is characterized by comprising the following steps: S1, raw material selection and pretreatment: diamond particles: selecting high-purity diamond powder with the particle size of 0.1-1 mu m; a hard alloy, such as a cobalt-based alloy, is adopted as a matrix material; nanoscale ceramic particles such as silicon nitride and aluminum oxide are added to serve as the reinforcing materials, gaps between the base body and the diamond particles are filled, and the compactness of the materials is improved; and S2, diamond particle uniform distribution treatment is conducted, specifically, a mechanical stirring and ultrasonic dispersion combined method is adopted, the diamond particles and the matrix powder are fully mixed, the matrix powder and the diamond particles are stirred at a low speed through mechanical stirring, and the particles are preliminarily dispersed. And the uniformity is improved: mechanical stirring, ultrasonic dispersion and electrostatic dispersion are combined, so that the distribution uniformity of diamond particles in a matrix is remarkably improved.

The invention discloses a gearbox vibration and noise reduction structure, and relates to the technical field of gearboxes. The problem that an existing gearbox is large in noise in the operation process is solved. The box comprises a box body, a vibration reduction layer and a noise reduction layer are sequentially arranged on the inner wall of the box body, the vibration reduction layer is located on the side close to the box body, the vibration reduction layer is attached to the inner wall of the box body, the noise reduction layer is located on the side away from the box body, the vibration reduction layer is bent along with the box body to achieve vibration reduction, and the noise reduction layer absorbs and obstructs noise to achieve noise reduction. When the vibration reduction layer bends and vibrates along with the box body, the tension and compression deformation of the vibration reduction layer converts vibration energy into macromolecular chain or chain segment movement, mechanical energy is converted into heat energy through intermolecular internal friction to be consumed, meanwhile, generated noise can be absorbed by the noise reduction layer, noise diffusion is further prevented, and the noise reduction effect is improved. Therefore, the high-frequency vibration noise of the box body is suppressed, and the noise is controlled.

The invention relates to the technical field of plastic modification processing, in particular to high-conductivity composite system coated black talcum powder and a preparation method thereof as well as a modified master batch containing the black talcum powder and a preparation method of the modified master batch. The high-conductivity composite system coated black talcum powder coating material is prepared from the following components in percentage by mass: 65.0 to 76.0 weight percent of high-conductivity composite system coated black talcum powder, 5.0 to 10.0 weight percent of cobalt ferrite nanoparticles, 15.0 to 20.0 weight percent of carrier resin, 2.0 to 3.0 weight percent of dispersing agent and 0.5 to 1.0 weight percent of lubricating agent, according to the technology provided by the invention, the black talcum powder is changed from a common traditional inorganic filler to a high-end functional filler with a conductive functional modification effect, so that the product added value of the black talcum powder is improved, and an important contribution is made to development and application of black talcum powder ore in China.

The invention discloses a steel belt with a high-wear-resistance coating and a machining process of the steel belt, and relates to the technical field of stainless steel belts. According to the scheme, a stainless steel band is used as a base material, the stainless steel band can be a cold-rolled steel band or a hot-rolled steel band, and the specific model can be limited according to actual application requirements; the surface of the stainless steel band is subjected to oil removal and hydrochloric acid activation, then the stainless steel band is sequentially placed in a nickel layer plating solution A and a nickel layer plating solution B, a double-layer plating layer is formed through electroplating, nickel sulfate serves as main salt in the nickel layer plating solution A, and a nickel layer is pre-plated on the surface of the stainless steel band; nickel sulfate and cobaltous sulfate are used as main salts in the nickel layer plating solution B, and a nickel-cobalt plating layer is formed on the surface of the pre-nickel-plated layer, so that a composite plating layer with excellent wear resistance is formed on the surface of the stainless steel band, and the corrosion resistance of the stainless steel band is also improved.

The invention relates to the technical field of vehicle part manufacturing, and discloses a truck swing arm anti-impact forging method which comprises the following steps: S1, selecting low-alloy steel as a basic metal material, mixing the low-alloy steel with carbon nanotubes and silicon oxide nanoparticles, and carrying out heat treatment; wherein the carbon nanotubes and the silicon oxide nanoparticles are mixed into the metal powder according to a specific weight ratio; s2, under the protection of inert gas, the mixed metal powder is heated to 1200 DEG C, and thermal mechanical alloying is carried out at the temperature by applying mechanical pressure, so that a prefabricated blank with a uniform microstructure is formed; the impact resistance of the swing arm is remarkably improved by using the carbon nanotubes and the silicon oxide nanoparticles to reinforce the matrix metal and combining with multi-step forging and serialized heat treatment. According to the application of the composite material and the comprehensive processing technology, the microstructure of the material is optimized, so that the swing arm can bear larger impact force under extreme working conditions and cannot be broken, and the safety and reliability of a vehicle under complex road conditions are guaranteed.

The invention provides a composite manufacturing method for improving the integrity of the side face of a 316L part manufactured through selective laser melting additive manufacturing. The composite manufacturing method comprises the following steps that S1, selective laser melting additive manufacturing is conducted on the part; in this step, each layer is divided into a boundary region and a core region, and differentiated scanning strategies are implemented. Specifically, the boundary area adopts a scanning strategy of parallel section contour lines, and the core area adopts a conventional strip or chessboard type scanning strategy, so that the surface quality is optimized; and S2, ultrasonic surface deep rolling post-treatment is conducted on the side face of the part. The method is characterized in that through the combination of partition scanning and post-treatment, the excellent surface integrity, including high surface hardness, high corrosion resistance and low surface roughness, of the side face of the additive manufacturing 316L stainless steel part is achieved. Particularly, the surface roughness reaches the precision grinding level, meanwhile, the thin-wall part manufactured through the method shows extremely high strength and plasticity at the same time, and therefore the requirement for high-performance application is met.

The invention relates to the technical field of fastener surface machining, in particular to a fastener high-precision surface machining method based on image recognition, which comprises the following steps: finishing fastener thread machining by using a thread rolling machine; carrying out surface shot blasting treatment on the fastener; sampling and collecting a plurality of thread position images of the fastener after shot blasting to obtain the surface roughness and surface defect information of the thread after shot blasting; judging whether shot blasting treatment of the fastener meets a preset standard or not according to the shot blasting surface feature coefficient; the fastener is subjected to hot dip galvanizing treatment; performing a copper sulfate test to obtain a characteristic surface precipitation ratio of the fastener under a preset duration; judging whether the hot-dip galvanizing treatment of the fastener meets a preset standard or not according to the characteristic surface precipitation ratio; and surface oil coating and packaging are conducted on the fastener meeting the preset standard after hot-dip galvanizing treatment. According to the invention, the surface processing technology of the fastener is optimized through image recognition detection, and the quality of the fastener is improved.

The invention provides a bypass valve sliding sleeve, a production process thereof and a bypass valve, and relates to the field of petroleum drilling. Comprising a main body rod, a spring rod, a spring and a limiting device, the diameter of the main body rod is larger than that of the spring rod, and one end of the main body rod is detachably connected with the spring rod; a limiting groove is formed in the end, away from the body rod, of the spring rod in the axial direction, one end of the limiting device is slidably connected into the limiting groove, and the spring is arranged outside the spring rod in a sleeving mode and abuts against the position between the limiting device and the body rod. The production process comprises the steps that the main body rod is made of an erosion-resistant alloy material; the spring rod is made of a high-strength alloy steel material; according to the shape and size of a to-be-machined limiting device, a high-strength alloy steel material is adopted to prepare an initial limiting column body, and the initial limiting column body is subjected to surface treatment. The split type structure is convenient to produce, disassemble, assemble and maintain, and the production cost and the damage rejection rate can be reduced; the strength of the sliding sleeve and the limiting device can be improved, the overall strength of the bypass valve is improved, and the service life is prolonged.

The invention discloses a modified resin composition for a high-pressure-resistant and high-wear-resistant PVC (polyvinyl chloride) hose, and belongs to the technical field of PVC pipes. The sisal fibers are subjected to alkali treatment, impurities are removed and active sites are increased through insertion modification and alkali treatment of the magnesium aluminate spinel fibers, the magnesium aluminate spinel fibers improve the performance of the pipe due to the high length-diameter ratio and other characteristics of the magnesium aluminate spinel fibers, a stable enhanced network structure is formed in a PVC matrix, the surface hardness and wear resistance are improved, the pressure is shared, and the pressure resistance is improved. A bicyclo [2.2. 2] octane structure contained in the long-chain graft modifier disclosed by the invention has rigidity and steric hindrance effect, can uniformly disperse pressure to avoid breakage or excessive deformation of a molecular chain, and is coupled with an amino silane coupling agent to form a three-dimensional structure to improve pressure resistance and wear resistance. After sulfonic groups and a long-chain grafting modifier are introduced to the surfaces of the interspersed modified sisal fibers, the hydrophobic and oleophylic properties of the sisal fibers are improved, the compatibility with PVC is enhanced, agglomeration is avoided, friction is effectively resisted, and the processing fluidity of the material is improved.

The invention relates to the technical field of structural steel, in particular to high-hardness corrosion-resistant steel for a structure and a preparation process of the high-hardness corrosion-resistant steel. The steel billet comprises the following components in percentage by mass: 0.05 to 0.09 percent of C, 0.05 to 0.12 percent of Si, 1.35 to 1.60 percent of Mn, 0.02 to 0.05 percent of Al, 0.04 to 0.11 percent of Ti, 0.03 to 0.05 percent of Nb, 0.15 to 0.18 percent of Mo, 0.004 to 0.09 percent of V, less than or equal to 0.002 percent of B, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of N, less than or equal to 0.003 percent of O and the balance of Fe. According to the invention, low-carbon manganese-containing steel is taken as a basis, and elements such as niobium, titanium, vanadium and boron are compounded and microalloyed, so that the mechanical property and corrosion resistance of the steel are improved.

The invention relates to the technical field of plastic modification processing, in particular to a high-electric-conductivity and high-heat-conductivity reinforced polyphenylene sulfide compound based on black talcum powder filling. The PPS compound is a PPS composite material filled with black talcum powder coated on the basis of a high-conductivity composite system, and the PPS compound is prepared from the following components in percentage by mass: 75.0 to 86.0 weight percent of PPS resin, 10.0 to 21.0 weight percent of black talcum powder coated by the high-conductivity composite system, 2.0 to 3.0 weight percent of ferric trichloride powder, 0.5 to 1.0 weight percent of dispersing agent, 0.1 to 0.15 weight percent of main antioxidant and 0.1 to 0.15 weight percent of auxiliary antioxidant. The black talcum powder is coated with a high-conductivity composite system, an electronic path is established between an internal graphite layer and an external coating layer, and when the high-conductivity composite system is used for PPS filling modification, not only is the strength, modulus, rigidity, surface hardness and dimensional stability of PPS improved, but also the conductivity and thermal conductivity of PPS can be remarkably enhanced, and therefore the effect of achieving two purposes at a time is achieved.

The invention relates to the technical field of stainless steel, in particular to a high-hardness stainless steel band which comprises a stainless steel band body, a primary nitriding treatment nitride layer, a laser cladding high-entropy alloy layer and a secondary nitriding treatment nitride layer. The laser cladding high-entropy alloy layer is obtained by cladding alloy powder on the stainless steel band with the primary nitriding treatment nitride layer through laser, and the alloy powder comprises iron, cobalt, nickel, aluminum and vanadium elements with equal molar weight. The high-hardness stainless steel band has the effect of improving the strength, hardness, wear resistance and corrosion resistance of the stainless steel band, and the high-hardness stainless steel band can keep good working performance for a long time in a severe working condition environment.

The invention discloses a gas nitriding method for a 1Cr11Ni23Ti3MoB shaft part. The gas nitriding method comprises the following steps: step 1, pretreating the 1Cr11Ni23Ti3MoB part; 2, drying the quartz sand, mixing ammonium chloride and the quartz sand, and charging; step 3, charging the parts into a furnace; 4, nitrogen is introduced into the furnace, and exhaust is conducted; 5, the temperature of the nitriding furnace is increased to 400 DEG C or above, and ammonia gas is introduced into the furnace in two paths; 6, the temperature of the nitriding furnace is increased to 540 + / -5 DEG C, and heat preservation is conducted for 30 + / -1 h; detecting whether the decomposition rate of ammonia in the furnace is 30-50% or not; and 8, the temperature of the nitriding furnace is increased to 570 + / -5 DEG C, heat preservation is conducted for 25 + / -1 h, whether the ammonia decomposition rate in the furnace ranges from 60% to 80% or not is detected, then introduction of ammonia gas into the furnace is stopped, nitrogen is introduced into the furnace according to the speed of 2 m < 3 > to 3 m < 3 > / h, the 1Cr11Ni23Ti3MoB shaft part is cooled to 150 DEG C or below along with the path, introduction of nitrogen is stopped, and the part is discharged out of the furnace.

The invention provides an inner hole automatic hammering and strengthening device and a using method, the inner hole automatic hammering and strengthening device comprises a hammering device mounted on a machine tool tailstock, a plurality of hammering heads capable of reciprocating in the radial direction are arranged on the peripheral side of the end of the hammering device, the hammering heads are arranged in a workpiece mounted on a machine tool chuck and used for hammering and strengthening the inner wall of the workpiece, and a sliding supporting seat is arranged on a machine tool sliding rail. The sliding supporting seat is used for supporting the hammering device; a sliding hammer core shaft is arranged in the hammering sleeve, the bottom of the hammering head is clamped on the hammer core shaft to slide, a pneumatic linear vibrator is arranged at one end of the transmission rod assembly, and the other end of the transmission rod assembly is connected with the hammer core shaft. The machining efficiency and precision of strengthening the inner wall of the inner hole are remarkably improved, the performance of the workpiece is enhanced, and the labor intensity and the production cost are reduced. The method is suitable for workpieces with various complex shapes and long inner holes, and the requirements of the modern manufacturing industry for efficient and high-quality production are met.

The invention relates to the technical field of foamed silicone rubber and production and preparation processes, in particular to high-hardness foamed silicone rubber and a preparation method thereof.The high-hardness foamed silicone rubber is prepared from 1-20 parts of hydrogen-containing polysiloxane, 10-70 parts of hydroxyl-terminated polymethylvinylsiloxane, 1-30 parts of a mechanical reinforcing agent, 10-80 parts of a flame retardant and 0.05-0.3 part of a catalyst; the mechanical reinforcing agent is a mixture which simultaneously uses fumed silica, vinyl MQ silicon resin and surface-treated carbon nanotubes, so that the foamed silicone rubber has high hardness and does not increase the density, and meanwhile, by utilizing the shear thickening gel which is filled and adsorbed in the carbon nanotubes, when the foamed silicone rubber material is pressed, the foam silicone rubber material is not easy to deform. According to the present invention, the carbon nano-tube can rapidly harden, such that the originally soft carbon nano-tube can form the skeleton support on the foamed silicone rubber so as to improve the compressive strength and the permanent deformation property of the foamed silicone rubber, such that the foamed silicone rubber material with characteristics of good hardness, low density, excellent compressive strength and excellent resilience can be used for new energy battery support.

The invention provides a dry particle composition, a ceramic tile with an embossment color effect and a preparation method of the ceramic tile, and belongs to the technical field of ceramics. The specific first dry granules and the specific second dry granules are compounded according to a specific proportion, so that the obtained dry granule composition has a wider firing temperature range, a remarkable and stable surface relief effect of a ceramic product is ensured, and the stability of batch production is high; meanwhile, the surface hardness, the abrasion resistance, the anti-skid performance, the stain resistance and other performance of a ceramic product are greatly improved compared with those of a common printed and decorated product, finger touch is warm, smooth and fine, the ceramic product is slightly concave and convex like an original stone, the ceramic product is better than a common wall and floor tile product in visual sense and touch sense, and the competitiveness of the product is greatly improved.

The utility model discloses a cover plate structure for increasing surface hardness, which comprises a cover plate body, a backlight module is arranged on one side of the cover plate body, a coating layer for increasing the surface hardness is arranged on the surface of the cover plate body, and the coating layer comprises a first film layer, a second film layer and a third film layer which are sequentially stacked from top to bottom. The cover plate structure has the effects of increasing the surface hardness and enabling the cover plate body to prevent blue light and glare.