918results about How to "Improve plasticity" patented technology

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a high-purity aluminum oxide ceramic substrate and a preparation process thereof. The high-purity aluminum oxide ceramic substrate is prepared from the following raw materials in parts by weight: 0.20 to 0.25 part of magnesium oxide, 0.35 to 0.55 part of zirconium oxide, 1.2 to 1.5 parts of dispersing agent, 60 to 65 parts of ethanol, 99.7 to 99.8 parts of aluminum oxide, 12 to 15 parts of adhesive, 6 to 9 parts of plasticizer and 50 to 55 parts of n-butyl alcohol, the adhesive is a mixture of polyvinyl butyral, water glass and modified paraffin. The prepared high-purity aluminum oxide ceramic substrate has excellent chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has better density, mechanical property and thermal stability by mixing various raw material components, and is not easy to break when subjected to bending load.

The invention relates to a stem cell bioactive nano-vesicle with efficient inflammation regulation and tissue repair effects, the average particle size of the nano-vesicle is 100-350nm, the polydispersity index (PDI) is 0.05-0.40, and the expression rate of phosphatidylserine (PS) on the surface of the nano-vesicle is greater than 40%. According to the preparation method, stem cells are subjected to apoptosis induction, and then a programmed serial extrusion process is adopted to prepare the nano-vesicles. The nano vesicles are moderate in particle size, uniform in distribution and high in production efficiency, the preparation process is easy to operate, the quality is stable and controllable, and the nano vesicles have excellent technical effects in the aspects of repair and regeneration of inflammation injury type tissues and organs.

The invention discloses a hot-rolled high-weather-resistance steel plate with extremely low yield ratio and 850 MPa-grade tensile strength as well as a manufacturing method and application of the hot-rolled high-weather-resistance steel plate. The steel plate comprises chemical components in percentage by weight as follows: 0.06%-0.08% of C, 0.40%-0.60% of Si, 0.40%-0.60% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.005% of S, 2.50%-3.00% of Cr, 0.25%-0.30% of Cu, 0.13%-0.15% of Ti, 0.020%-0.040% of Alt, smaller than or equal to 0.0040% of N, smaller than or equal to 0.0030% of O and the balance of Fe and inevitable impurities. The high Cr + high Ti design is adopted, the tensile strength reaches 850 MPa, the weather resistance index I value is larger than or equal to 8.0, addition of precious metal Ni is omitted, the addition amount of the strong hardenability element Cr in the steel exceeds 2.50%, a fine grain ferrite and bainite double-phase structure is obtained in combination with the controlled rolling and controlled cooling process, meanwhile, the precipitation strengthening and fine grain strengthening effects of Ti are fully exerted, control over high strength and the extremely-low yield ratio smaller than 0.65 is achieved, and the high-strength and low-yield-ratio steel is obtained. The forming performance is excellent, the corrosion rate is smaller than 40% relative to Q345B, and good atmospheric corrosion resistance is achieved.

The invention belongs to but is not limited to the technical field of aluminum alloy preparation, and discloses a high-plasticity aluminum alloy prepared from secondary aluminum and a preparation method, high-quality secondary aluminum waste is selected, and obvious impurities are removed; carrying out chemical or mechanical cleaning on the secondary aluminum, and sorting; the pretreated secondary aluminum waste is added into a smelting furnace to be smelted; a purifying agent is added for melt purification; the melt is further purified through inert gas stirring and standing; adding a proper amount of alloy elements into the melt; under the protection of inert gas, uniformly stirring the melt; casting the melt into a cast ingot by adopting a semi-continuous casting or continuous casting process; controlling the cooling speed; carrying out homogenizing heat treatment on the cast ingot to eliminate composition segregation in the cast ingot; and extruding and rolling to obtain the high-plasticity aluminum alloy material. According to the method, the purity of the aluminum alloy is improved, the performance uniformity is enhanced, and the aluminum alloy material with high plasticity and excellent mechanical performance is obtained and is suitable for industrial application with high requirements.

The invention belongs to the technical field of laser processing, and particularly relates to a method for manufacturing a titanium alloy through wire powder coordinated multi-mode laser coupling additive manufacturing, and the method comprises the steps of base material pretreatment, multi-mode coupling laser construction, additive manufacturing, surface strengthening and the like. According to the titanium alloy part manufacturing device and method, material conveying is conducted in the mode that wire feeding and powder feeding are combined, structures with large areas in parts are rapidly manufactured through wire feeding, fine structures are manufactured through powder, and the titanium alloy parts can be efficiently manufactured in a high-precision mode. In the additive manufacturing step, multi-mode coupling annular laser is adopted, annular flat-topped pulse laser can accelerate flowing of a liquid phase before solidification, so that dendritic crystal arms formed through solidification in advance are broken to form new crystal nucleuses, then an equiaxed crystal structure is formed, and the strength and plasticity of the titanium alloy are improved. The annular flat-topped pulse laser can accelerate stirring of the molten pool, the heat mass conveying rate in the molten pool is increased, the element segregation phenomenon is relieved, and finally a uniform and stable titanium alloy structure is obtained.

The invention relates to the technical field of waste rubber recovery, in particular to a method for preparing a rubber compound by recycling waste rubber and the prepared rubber compound. The high-shear mechanical desulfurization technology is combined, the desulfurization efficiency is further improved through the synergistic effect of various components in the compound auxiliary, and meanwhile the plasticity of the waste rubber and the compatibility of the waste rubber and new rubber are enhanced. The method not only can effectively destroy the cross-linked structure of the waste rubber, but also can be used for preparing a high-performance rubber compound product by mixing the waste rubber with a new rubber material through a subsequent mixing process, and is widely applied to manufacturing high-strength and wear-resistant rubber products, such as solid tires and the like.

The invention relates to an aluminum steel dissimilar part and a preparation method thereof, and relates to the technical field of metal processing. According to the main technical scheme, an aluminum component of a set structure is deposited on a steel component through a friction extrusion deposition method, so that aluminum-steel interface connection is achieved, and an aluminum-steel dissimilar part is obtained; wherein the aluminum component is made of aluminum or aluminum alloy. According to the method, the aluminum-steel dissimilar part is prepared mainly through the friction extrusion deposition additive manufacturing process, a traditional aluminum-steel interface hard and brittle intermetallic compound layer is converted into a tough amorphous layer, and the problems that an existing aluminum-steel dissimilar part is low in interface tensile strength and prone to cracking are solved.

The invention discloses an aluminum alloy extrusion forming production process, which relates to the technical field of extrusion production, and comprises the following steps: designing an extrusion die, carrying out surface heat treatment on the extrusion die, selecting an aluminum alloy material, heating and extruding, carrying out surface treatment processing on a produced aluminum alloy profile, and packaging the aluminum alloy profile after the aluminum alloy profile is inspected to be qualified. Compared with the prior art, the method has the advantages that the grain structure of the profile can be more uniform and refined by accurately regulating and controlling the complex relation among parameters such as the extrusion temperature, the mold temperature, the extrusion speed and the lubricating condition, so that the mechanical property is enhanced, like a 6063 aluminum alloy profile, the tensile strength can be improved, the yield strength is improved, deformation or damage in the using process is effectively avoided, and meanwhile, the service life of the profile is prolonged. Good parameter matching can effectively reduce internal defects of the profile, metal can flow in a mold more smoothly, internal pores, cracks and other defects caused by non-uniform metal flow are reduced, and the surface quality is greatly improved.

The invention is applicable to the technical field of titanium alloy pipe processing, and particularly relates to a preparation method of a high-plasticity TA15 titanium alloy pipe, which comprises the following steps: step S1, selecting sponge titanium, pure metal and intermediate alloy, preparing according to standard components of TA15 titanium alloy to obtain a prepared raw material, and smelting the prepared raw material for three times by adopting a vacuum consumable smelting furnace to obtain a high-plasticity TA15 titanium alloy pipe; and the TA15 titanium alloy cast ingot with the diameter being 600 mm is obtained. According to the method, the mechanical property and plasticity of the titanium alloy pipe are remarkably improved by accurately controlling the temperature and deformation of each machining step. And three-time upsetting and three-time drawing forging is carried out within the temperature range of T beta or above, coarse grains are effectively crushed, and grain structures are refined. And then, the metallographic structure of the wool rod is gradually optimized by accurately controlling the forging temperature and the deformation amount.

The invention discloses lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with yield strength of 400MPa. The lanthanum-cerium mixed rare earth corrosion-resistant twisted steel comprises the following elements: 0.10 to 0.20 percent of C, 0.25 to 0.80 percent of Si, 0.90 to 1.60 percent of Mn, 0.020 to 0.045 percent of V, 0.003 to 0.010 percent of Ti, less than or equal to 0.010 percent of P, less than or equal to 0.010 percent of S, 0.25 to 0.65 percent of Ni, 0.25 to 0.70 percent of Cr, 0.10 to 0.18 percent of RE, less than or equal to 0.20 percent of Cu, less than or equal to 0.004 percent of O, less than or equal to 0.006 percent of N and the balance of Fe and inevitable impurities. The invention further discloses a production method of the lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with the yield strength being 400 MPa. The production method comprises the working procedures of converter smelting, argon blowing refining, LF furnace refining, continuous casting and rolling, and the lanthanum-cerium mixed rare earth reinforced alloy cored wire and the silicon-calcium wire are fed into molten steel in the argon blowing refining process. The components, inclusions and mechanical properties of the produced 400 MPa-grade lanthanum-cerium mixed rare earth steel bar completely meet the technical requirements of the steel bar, the quality control requirement is met, and the 400 MPa-grade lanthanum-cerium mixed rare earth steel bar has the advantages of being high in strength, high in plasticity, resistant to corrosion and the like. The service life of the steel is prolonged, coating and galvanization are avoided, the burden of environmental protection is relieved, and reasonable application of resources is facilitated.

The invention relates to the technical field of metal processing, in particular to a zirconium alloy plate texture control method for regulating recrystallization based on cold rolling deformation. The zirconium alloy hot-rolled plate blank is subjected to annealing treatment, so that an equiaxial grain structure with the proper size is obtained; cold rolling treatment is conducted on the zirconium alloy plate blank obtained after annealing treatment, different rolling deformation accumulation modes are introduced through total deformation design, rolling pass control and pass deformation control, and different dislocation and subgrain distribution states are formed in the zirconium alloy cold-rolled plate; and the zirconium alloy plate strip prepared through cold rolling deformation is subjected to annealing treatment, so that a completely recrystallized plate with refined grains and weakened texture is obtained, and the plasticity and forming performance of the zirconium alloy plate are improved. The technological process is simple, the recrystallized zirconium alloy plate with the basal texture weakened can be obtained only by slightly changing the zirconium alloy plate machining technology, the anisotropy of the zirconium alloy plate can be reduced, and therefore the use performance of the zirconium alloy plate is improved.

The invention relates to the technical field of titanium alloy rolling processing, and discloses a method for inhibiting surface cracking in the rolling process of a high-strength titanium alloy thick plate, which comprises the following steps: selecting a titanium alloy plate blank, and preheating the plate blank; the preheated plate blank is subjected to surface multi-pass rolling treatment, and the roll gap set in the later-pass rolling treatment is smaller than that in the previous-pass rolling treatment; remelting and heating the plate blank, wherein the heating temperature is higher than the preheating temperature; the plate blank is discharged out of the furnace and subjected to multi-pass rolling, a rolled plate blank is obtained, and the rolling pass rolling reduction is controlled to range from 5 mm to 25 mm; and the rolled plate blank is straightened on line and then air-cooled to the room temperature. According to the method, the surface layer of the plate blank substrate is subjected to structure prefabrication, the surface plasticity is improved, the extensibility in the rolling process is improved, and generation of surface cracks is restrained.

The invention discloses a heat treatment-free die-casting aluminum alloy for a structural part. The heat treatment-free die-casting aluminum alloy comprises the following components in percentage by mass: 7.5%-11.5% of Si, less than or equal to 0.2% of Fe, 0.6%-1.2% of Mg, 0.05%-0.8% of Mn, 0.05%-0.4% of Cr, 0.03%-0.3% of Ta, 0.03%-0.3% of Nb, 0.03%-0.3% of Ni, 0.01%-0.12% of Ti, 0.03%-0.6% of Y, 0.03%-0.6% of Ce, 0.03%-0.6% of Er, 0.005%-0.05% of Sr and the balance of aluminum. The preparation method comprises the following steps: mixing and smelting an aluminum ingot, metal silicon, an aluminum-manganese intermediate alloy, an aluminum-chromium intermediate alloy, an aluminum-tantalum intermediate alloy, an aluminum-niobium intermediate alloy, an aluminum-nickel intermediate alloy, an aluminum-titanium intermediate alloy, an aluminum-yttrium intermediate alloy, an aluminum-cerium intermediate alloy and an aluminum-erbium intermediate alloy to obtain a melt I; adding a magnesium ingot into the melt I, smelting, introducing argon, refining to obtain molten aluminum, and casting to obtain an aluminum alloy ingot. The method is suitable for high-pressure casting forming to prepare force-bearing structural parts with complex shapes, can have good mechanical properties without heat treatment, and can be used for production of various parts required by new energy automobiles.

The invention discloses a manufacturing method of a UNS N06690 alloy seamless heat exchange tube, which belongs to the technical field of material processing, and comprises the following steps of: (1) performing peeling, PT inspection, shearing, centering, grinding, heating, perforating, water cooling and inspection on a round steel material; (2) carrying out acid pickling on the hot-punched blank, and then carrying out incoming material inspection and inner and outer surface grinding; (3) two-pass intermediate product cold rolling is carried out, and after cold rolling, intermediate product deoiling, intermediate product heat treatment, intermediate product straightening, intermediate product pipe cutting, acid pickling, intermediate product grinding and repairing and intermediate product inspection are carried out; (4) carrying out finished product cold rolling; (5) deoiling a finished product; (6) performing heat treatment on a finished product; (7) straightening a finished product; (8) carrying out finished product ultrasonic eddy current, water pressure and pipe cutting, sampling during pipe cutting, and carrying out physical and chemical tests; and (9) the obtained steel pipe is subjected to the procedures of finished product surface inspection, size inspection, cleaning, mark spraying and finishing and finally packaged and warehoused, and the product produced through the method is high in one-time inspection qualification rate and high in yield.

The invention provides nickel-based superalloy powder and a preparation method and application thereof, nickel-based superalloy and a preparation method and application thereof, and relates to the technical field of alloys. The preparation method comprises the following steps: smelting a nickel-based high-temperature alloy raw material to obtain alloy liquid; and the alloy liquid is atomized and crushed, and the nickel-based high-temperature alloy powder is obtained. Compared with traditional nickel-based superalloy preparation, aluminum nitride and titanium nitride raw materials are added in the nickel-based superalloy powder preparation process, aluminum nitride and titanium nitride are separated out in the alloy powder preparation process to form a strengthening phase, and the tensile strength and the elongation at break of the nickel-based superalloy can be improved; and particularly, as a main raw material for additive manufacturing of high-performance metal components, the material has a very good application prospect.

The present invention relates to a heat treatment method for a high-strength, tough, lightweight, wear-resistant high-manganese steel casting, and the steps are as follows: pretreatment: coating an anti-oxidation protective coating on the surface of the high-manganese steel casting; water toughening treatment: heating the high-manganese steel casting to the water toughening temperature at a preset speed, keeping the temperature and then water quenching; cryogenic treatment: cooling the high-manganese steel casting after water toughening to the cryogenic treatment temperature and keeping the temperature; aging treatment: heating the high-manganese steel casting after cryogenic treatment to the aging temperature and keeping the temperature, keeping the temperature, and then air cooling to room temperature, and the interval between cryogenic treatment and aging treatment is not more than 1h; shot peening treatment: shot peening treatment is performed on the surface of the high-manganese steel casting after aging treatment. The present invention utilizes a combination of water toughening, cryogenic treatment and aging treatment to obtain a single austenite structure, obtain an effective dispersed nano-scale carbide structure, and effectively improve the grain refinement and solid solution strengthening effect of the high-strength, tough, lightweight high-manganese steel.

The invention discloses a preparation method of a CoCrNi medium-entropy alloy and Q235B steel explosive welding composite board, which comprises the following steps of: annealing a CoCrNi medium-entropy alloy board, sequentially laying sandy soil, an anvil, a Q235B hot-rolled steel plate, a support column, a medium-entropy alloy board, kraft paper and explosive from bottom to top on an explosion field, and performing explosive welding to obtain the CoCrNi medium-entropy alloy and Q235B steel explosive welding composite board. The detonation velocity of the explosive ranges from 2500 m / s to 3000 m / s, and the brisance of the explosive ranges from 18 mm to 22 mm. According to the method, metallurgical bonding of the CoCrNi medium entropy alloy and the Q235B steel plate is achieved, the interface bonding rate of the obtained composite plate is larger than 99.2%, the yield strength is larger than 420 MPa, the tensile strength is larger than 500 MPa, the percentage elongation after fracture is larger than 35%, and the interface shear strength is larger than 200 MPa. The method is simple in process and suitable for industrial production.

The invention relates to the technical field of Ti2AlNb-based alloys, in particular to a preparation method of a deformed Ti2AlNb alloy and the deformed Ti2AlNb alloy prepared through the preparation method. The preparation method comprises the following steps: (a) carrying out cogging forging on a Ti2AlNb alloy ingot in T1, and then carrying out step-by-step cooling forging in a range of 940-1100 DEG C to obtain an intermediate billet; (b) processing the intermediate blank in T2, and then carrying out heat treatment; in the machining process, the deformation of a single heating number is 20%-85%; t1 is 1100 DEG C to 1200 DEG C, and T2 is 960 DEG C to 1060 DEG C; and in the step-by-step cooling forging, the final forging temperature is 940-1040 DEG C, and T2 is 20-120 DEG C higher than the final forging temperature. According to the method, the original structure of the Ti2AlNb alloy cast ingot can be refined, the structure uniformity is improved, and meanwhile the mechanical property and the yield of the alloy can be improved.

The invention belongs to the technical field of alloy additive materials, and particularly relates to an AlSi10Mg alloy and a laser powder bed melting preparation method thereof, seed crystal alloy powder with the mass percent of Al-2. 63Ti-0.66 C-0.13 B is introduced into the AlSi10Mg alloy for modification, the TM-AlSi10Mg alloy is prepared through the laser powder bed melting technology, and grain refinement and microstructure optimization are remarkably achieved. The TM-AlSi10Mg alloy shows a double-peak heterogeneous microstructure formed by fine isometric crystals and thick isometric crystals which are periodically arranged, and the average grain size is about 2.8 microns. The yield strength, the tensile strength and the ductility of the alloy are all improved.

The invention relates to a low-density AlNbTaTiZr refractory high-entropy alloy and a preparation method thereof, belongs to the technical field of metal materials, and solves the problem that a refractory high-entropy alloy material obtained by adopting a vacuum arc melting technology in the prior art is difficult to ensure relatively high strength, good plasticity and relatively low density at the same time. The preparation method of the low-density AlNbTaTiZr refractory high-entropy alloy comprises the following steps that S1, raw materials are prepared, and mixed powder is prepared according to the designed molar ratio; s2, alloy ingots are prepared, and the mixed powder is subjected to vacuum melting to obtain the alloy ingots; s3, the alloy ingot is subjected to vacuum melting, and an alloy cast ingot is obtained; and S4, the alloy cast ingot is subjected to heat treatment, and an initial-state sample is obtained. According to the low-density AlNbTaTiZr refractory high-entropy alloy and the preparation method thereof provided by the invention, the obtained alloy material is relatively low in density, relatively high in yield strength, excellent in plasticity and relatively wide in application range.

The invention relates to a three-dimensional network carbide reinforced refractory alloy and a preparation method thereof, and belongs to the technical field of alloy material preparation. The three-dimensional network carbide reinforced refractory alloy is composed of a BCC matrix phase and a large number of dispersed three-dimensional network carbide reinforced phases, and the crystal structure of the carbide is M2C or MC type and is in a complete coherent relationship with the BCC matrix. The method has high adaptability, the applicable refractory alloy material range is wide, particularly fine component design is not needed, the process window is wide, and operation is easy. According to the material prepared by the method, a carbide phase and a matrix are coherent, the bonding strength is high, the stability is good, and repeated thermal cycle can be endured. According to the method, integration of material preparation and component forming can be achieved, high-freedom-degree direct forming of complex three-dimensional parts is directly achieved, and the forming requirement in the actual using process can be met to a great extent.

The invention relates to the technical field of titanium strip coils, in particular to a preparation method of a high-strength cold-rolled titanium strip coil for coiled tubing, which comprises the following steps: S1, cold rolling: a hot-rolled pickled coil with the thickness of 5.5-6.5 mm is subjected to cold rolling by adopting 20 rollers, and the hot-rolled pickled coil comprises the following components in percentage by mass: 0.26-0.33% of Fe, 0.27-0.33% of O and the balance of Ti; s2, degreasing is conducted, specifically, the titanium strip coil obtained after cold rolling is subjected to degreasing treatment; s3, annealing is conducted, specifically, a vertical bell-type furnace is filled with argon for protection for annealing treatment, furnace cooling is conducted after annealing is completed, and a titanium strip coil with the thickness being 3-4.5 mm for the coiled tubing is obtained; a cold rolling mode is adopted, the thickness of the titanium strip coil is rolled to 3.0-4.5 mm, a bell-type furnace annealing mode is adopted, an oxide layer is prevented from being generated on the surface, the bending performance of the titanium strip is enhanced, cracks are prevented from being formed on the surface during pipe manufacturing, the compressive strength, the yield strength and the ductility of the product are high, and the bending angle (6T) is large.

The invention discloses a graphene modified high-entropy alloy particle reinforced titanium-based composite material and a preparation method and application thereof. According to the composite material, titanium or a titanium alloy serves as a titanium matrix, and graphene is modified on the surface of a high-entropy alloy and serves as a reinforced phase together with the high-entropy alloy to be distributed at the grain boundary of the titanium matrix. In the microstructure of the material, the surface of the high-entropy alloy is modified with graphene, the interface of the high-entropy alloy and a titanium matrix and the solid solution degree of the high-entropy alloy in the titanium alloy matrix are regulated and controlled, and the graphene reacts with the matrix to generate titanium carbide to jointly reinforce the titanium alloy matrix with the high-entropy alloy. According to the preparation method, the graphene is modified on the surfaces of the high-entropy alloy particles by adopting a three-dimensional rotary mixing method, the problem that impurities are easily introduced in a conventional ball milling method is solved, and the graphene-modified high-entropy alloy particle reinforced titanium-based composite material block is obtained through sintering or laser 3D printing forming. The material has high strength and high plasticity, has excellent comprehensive mechanical properties, and can be applied to the fields of aerospace, ships and naval vessels and the like.

The invention provides a stainless steel sheet with grain size and martensite phase double gradient distribution and a preparation method thereof, and the stainless steel sheet comprises the following composition elements in percentage by mass: 18-22 wt% of Cr, 7-9 wt% of Ni, 0.8-1.5 wt% of Mn, 0.4-1.2 wt% of Si, and the balance of Fe and inevitable impurities, the austenite grain size and the martensite grain size in the microstructure of the prepared stainless steel sheet are in gradient distribution from the center to the edge, the martensite phase content is in gradient distribution from the edge to the center, and the preparation method of the stainless steel sheet with double gradient distribution comprises induction melting, axial cold rolling treatment and heat treatment. According to the stainless steel sheet, the yield strength and hardness of the material are remarkably improved, meanwhile, high plasticity is kept, the method is simple and efficient, and industrial large-scale application can be achieved.

The invention discloses a magnetic control silicon-based adhesive as well as a preparation method and application thereof. The magnetic control silicon-based adhesive is prepared from the following components in parts by weight: 60 to 70 parts of silane modified polyurethane, 15 to 25 parts of a silane coupling agent, 40 to 60 parts of a magnetic nano material, 15 to 45 parts of microcrystalline silicon, 25 to 40 parts of nano calcium carbonate, 5 to 15 parts of titanium dioxide, 5 to 10 parts of talcum powder, 10 to 15 parts of amino silane, 3 to 8 parts of color paste and 1 to 4 parts of a catalyst. The silane modified polyurethane, the magnetic nano material and the microcrystalline silicon are reasonably compounded, so that the obtained adhesive not only has good adhesive force, but also has excellent water resistance and aging resistance, the introduction of the magnetic nano material not only can be matched with electromagnetic equipment to realize remote repair, but also can improve the curing capacity of the adhesive, so that the adhesive has a good application prospect. And the microcrystalline silicon enables the chemical properties of the adhesive to be more stable, and can meet the building repair requirements in various complex environments.

The invention discloses a manufacturing method of an electromagnetic valve material with high corrosion resistance and easy cutting, which relates to the technical field of stainless steel and mainly comprises the following steps: melting in a heating furnace, AOD (argon oxygen decarburization) refining, LF (ladle furnace) refining, pouring, heat treatment, pretreatment, primary electroplating, secondary electroplating and finished product obtaining. And meanwhile, tin-bismuth alloy with specific content is introduced as a modifier for modification treatment, a slag former is added for refining and slagging-off, and the electromagnetic valve material which is good in corrosion resistance, high in strength and free of cutting is successfully prepared.

The invention discloses a novel flexible ecological drainage ditch structure and a construction method thereof, belongs to the technical field of drainage ditch construction, and solves the problems of serious deformation and cracking of a traditional concrete drainage ditch. The structure specifically comprises an anti-corrosion layer, a drainage layer and an anti-seepage layer. The seepage prevention layer is arranged at the bottom of the drainage ditch, the drainage layer is laid on the seepage prevention layer, and the anti-corrosion layer is laid on the drainage layer. According to the drainage ditch, the innovative design of combining the anti-corrosion layer, the drainage layer and the anti-seepage layer is adopted, so that a lower seepage body is effectively drained, the ditch body strength is improved, the basic requirements of confluence, quick drainage and seepage prevention of the drainage ditch are met, and the overall shear resistance and erosion resistance of the drainage ditch are improved; the construction method is suitable for construction of loose accumulation body slopes such as slide slag accumulation body slopes, waste slag accumulation bodies and mine dumping sites; the method has the advantages of being high in plasticity, high in terrain adaptability, high in environment flexibility, good in structure flexibility and the like.

The invention relates to the technical field of alloys, in particular to a Ni3Al-based alloy, a test bar, a turbine disc and a preparation method of the Ni3Al-based alloy. The invention discloses a Ni3Al-based alloy which comprises the following components in percentage by mass: 7%-9% of Al, 7%-8.5% of Cr, 0.13%-0.24% of C, 0.5%-2% of Ti, 3%-6% of Mo, 1%-3% of W, 1%-2% of Hf, 0.005%-0.03% of B and the balance of Ni. According to the Ni3Al-based alloy disclosed by the invention, all the elements are coordinated and matched, so that the Ni3Al-based alloy has a long-range ordered crystal structure, a stable high-temperature phase structure and excellent oxidation resistance, mechanical property and high-temperature property.

The present invention relates to the technical field of functional property modification of high-temperature shape memory alloys, and in particular to a method for improving the superelasticity of NiTiHf high-temperature shape memory alloys. The method specifically comprises the following steps: sequentially subjecting NiTiHf high-temperature shape memory alloy ingots to homogenization treatment, rolling treatment, and electric pulse treatment. The present invention couples rolling with electric pulses and precisely controls parameters such as temperature, time, and frequency, thereby successfully achieving a NiTiHf high-temperature shape memory alloy with significantly improved superelastic properties without the need for severe plastic deformation treatment and long-term medium and high temperature heat treatment. Compared with the cast NiTiHf high-temperature shape memory alloy, in addition to significantly improving the superelastic properties, the elongation and tensile strength of the alloy are also greatly improved, wherein the recoverable strain increase is more than 200%, the elongation is increased by nearly 3 times, and the tensile strength is increased by more than 10%.

The invention provides a rapid photoresponse liquid crystal elastomer actuator and a preparation method thereof, and belongs to a liquid crystal elastomer actuator in the technical field of high polymer materials. The liquid crystal elastomer actuator is a uniformly-oriented single-domain high-entropy alloy liquid crystal polymer, and is obtained by longitudinally and uniformly stretching a multi-domain high-entropy alloy liquid crystal polymer and then initiating photopolymerization by ultraviolet light; the multi-domain high-entropy alloy liquid crystal polymer contains dispersed high-entropy alloy and is obtained by cross-linking liquid crystal monomers; the fast photoresponse liquid crystal elastomer actuator is of a hollow radial symmetrical structure. The quick light response liquid crystal elastomer actuator has a full-solar spectrum absorption response function, has excellent plasticity and self-recovery performance, is simple and convenient in manufacturing process, integrates sensing, driving and built-in feedback loops, has high light tracking precision and self-adaptive phototropism, and can be used in the field of light tracking. And a brand new technical approach is provided for research and development of the intelligent soft robot.