31results about How to "Meet material performance requirements" patented technology

The invention discloses a method for preparing graphite powder and the equipment thereof and aims at solving the technical problems of improving the purity of graphite powder and reducing cost. The method of the invention comprises the following steps: the raw micro powder is delivered to a graphite crucible under vacuum state and put into a graphitizing furnace; and a graphite powder product is obtained after heat treatment and cooling. The preparation equipment of graphite powder is composed of a vacuum delivery device, a graphitizing furnace and a vacuum discharging device sequentially connected; the graphitizing furnace is equipped with a graphite crucible and connected with a gas filling system. Compared with the prior art, the method and the equipment of the invention are characterized in that the raw micro power is put into the graphite crucible after vacuum delivery, thus the entry of impurities is reduced in the treatment process, the product purity is greatly improved after heat treatment, graphitization is even, the consistency of the product is good, the graphitization and heat treatment efficiency of the powder material is improved, the technique is simple and the cost is low.

The invention relates to a preparation method of high-conductivity aluminum alloy and belongs to the field of nonferrous metal materials. The preparation method comprises the following steps of: preparing an aluminum ingot comprising the following alloy elements in percentage by weight: 4.5 to 13.5 percent of Si (silicon), 0.1 to 1.5 percent of Mg (magnesium) and not more than 0.1 percent of impurity elements, smelting the aluminum ingot in a furnace, adding 0.1 to 0.3 percent of zirconium which serves as additive for the alloying treatment, uniformly mixing, then adding 0.1 to 1.35 percent of rare-earth element for degeneration, purifying, degassing and deslagging, and covering the surface of aluminum liquid with a solid covering agent; casting to prepare the aluminum alloy conductor material; and carrying out the first-stage aging treatment and the second-stage aging treatment on the aluminum alloy conductor material, discharging and cooling with air. The manufactured aluminum-silicon alloy can meet the requirements on the aluminum alloy material conductivity and the mechanical property; and moreover, the preparation process is simple, the cost is low, and the mass production is easy to realize.

The invention discloses a method of stably regenerating gravel from cement. The method includes steps of: 1) preparing raw materials comprising the cement and regenerated crude and fine aggregate; 2) adding the raw materials according to a ratio; and 3) stirring, and adding water to obtain a finished product. The invention also discloses a product obtained by the method. The method is simple in preparation technology, easy to achieve, and high in production efficiency, and can rapidly and stably produce the gravel product with high compressive strength by utilization of the cement. The method has high production efficiency, largely reduced cost, and good economic and social benefit, and protects the environment. The design of the formula is reasonable. The raw materials are easily available. Processes of traditional gravel exploiting are effectively simplified. The compressive strength of the product is high and can meet requirements of buildings with respect to material performances, thus solving the gravel resource shortage problem and achieving objectives of environment protection and sustainable development. The product is easy to construct, shortens the time limit for a project, improves the construction efficiency and facilitates wide popularization and application.

The invention provides a high-hardness wear-resistant copper alloy for a plastic mould and a preparation method thereof. The copper alloy provided by the invention is composed of the following components in percentage by weight: 8-10% of Mo, 8-10% of Cr, more than or equal to 78% and less than 80% of Cu, and the balance of impurities. According to the invention, mechanical alloying, namely a non-equilibrium alloy preparation process, is mainly utilized, so that the two alloy elements including Mo and Cr difficult to solidly solute in Cu are solidly solute greatly; the solid solubility of Cr and Mo in Cu is beyond 8% in terms of weight percentage; a certain degree of dispersed precipitation of Mo and Cr exists in the subsequent hot-pressing and sintering processes; the hardness of Cu alloy is greatly increased under the combined action of dispersed precipitation and solution strengthening; therefore, the Cu-Cr-Mo alloy, the hardness of which is above 38 HRC and the heat conductivity of which is above 80 W / K.m, is obtained; and the alloy disclosed by the invention is a high-hardness alloy, which can satisfy the material property requirements of the plastic mould and is free from beryllium.

The invention relates to acid-resistant ultrahigh-strength steel for a deep-sea dynamic flexible vertical pipe and a preparation method of the acid-resistant ultrahigh-strength steel and belongs to the technical field of metallurgy. The steel comprises, by weight percentage, 0.04-0.1% of C, not more than 0.4% of Si, 0.3-1.4% of Mn, not more than 0.02% of P, not more than 0.008% of S, 0.8-2.0% of Cr, 0.8-1.5% of Mo, 0.3-0.8% of Ni, 0.012-0.045% of Nb, 0.01-0.02% of Ti and the balance Fe and inevitable impurities. The preparation method includes: performing smelting, refining and pouring according to the set components to obtain continuous casting billets; secondly, performing heating and heat preservation on the continuous casting billets, and performing multi-pass hot rolling to obtain hot-rolled wire rods; performing multi-pass cold rolling to obtain the Z-shaped steel for a dynamic flexible vertical pipe; thirdly, performing heating and heat preservation on the Z-shaped steel, and performing water quenching to allow the Z-shaped steel reach room temperature; annealing to obtain the ultrahigh-strength steel for the deep-sea dynamic flexible vertical pipe. The microscopic structureof the ultrahigh-strength steel is of a tempered martensite structure, the yield strength of the ultrahigh-strength steel is not smaller than 800MPa, the tensile strength of the ultrahigh-strength steel is not smaller than 880MPa, and the ductility of the ultrahigh-strength steel is not smaller than 10%.

The invention relates to low-alloyed steel used for brake discs of rail vehicles and a heat treatment method of the low-alloyed steel used for the brake discs of the rail vehicles. The low-alloyed steel used for the brake discs of the rail vehicles comprises the following chemical components in percentage by weight: 0.15-0.30% of C, 0.4-1.0% of Si, 0.4-1.0% of Mn, 0.6-1.4% of Cr, 0.4-1.2% of Ni, 0.2-0.6% of Mo, 0.15-0.4% of V, 0.15-0.35% of Cu, 0.1-0.3% of W, 0.025-0.045% of Nb, 0.025-0.045% of Zr, and the balance Fe, Re and Al which remains after purification and inevitable impurities. According to the low-alloyed steel used for the brake discs of the rail vehicles and the heat treatment method of the low-alloyed steel used for the brake discs of the rail vehicles, on the basis of the characters of steel brake discs of rail vehicles in service conditions, environments and shaping processes, material component design is conducted from the aspects of improving the high-temperature strength of the material (low-alloyed steel used for the brake discs of the rail vehicles), improving the weather resistance, refining grains, improving the plasticity and the like, and proper forging ratios and a quenched-tempered heat treatment technology are selected, so that the material performance requirements of forged steel brake discs or cast steel brake discs are met separately by the mechanical performance of the material (low-alloyed steel used for the brake discs of the rail vehicles) at a room temperature. For different scales of smelting conditions, different methods for controllingthe material purity are proposed, so that the purity of the alloyed steel is improved.

Disclosed is a method for preparing an ethylene vinyl acetate (EVA) / thermoplastic urethane (TPU) / polyolefin elastomer (POE) composite foaming material. The method includes fully and evenly mixing EVA, POE, EVA grafted maleic anhydride and TPU in an internal mixer, adding azodicarbonamide serving as a foaming agent, dicumyl peroxide serving as a cross-linking agent, an auxiliary foaming agent and talcum powders to the internal mixer for mixing to obtain a mixture, pressing the mixture on an open dual-roller mixing mill into sheets, feeding the sheets to a vulcanizing machine, and performing mould pressing, crosslinking and foaming forming to discharge the sheets to obtain the EVA / TPU / POE composite foaming material. By means of EVA-maleic anhydride (MA), the EVA / TPU composite material with good compatibility can be obtained, usage of 4, 4-diaminodiphenylmethane is avoided, the process is simple, costs are saved, and better performances are achieved; and simultaneously, a POE material is introduced to a system, so that important performance indexes of the prepared foaming material are well improved.

The invention relates to a preparation method of high-conductivity aluminum alloy and belongs to the field of nonferrous metal materials. The preparation method comprises the following steps of: preparing an aluminum ingot comprising the following alloy elements in percentage by weight: 4.5 to 13.5 percent of Si (silicon), 0.1 to 1.5 percent of Mg (magnesium) and not more than 0.1 percent of impurity elements, smelting the aluminum ingot in a furnace, adding 0.1 to 0.3 percent of zirconium which serves as additive for the alloying treatment, uniformly mixing, then adding 0.1 to 1.35 percent of rare-earth element for degeneration, purifying, degassing and deslagging, and covering the surface of aluminum liquid with a solid covering agent; casting to prepare the aluminum alloy conductor material; and carrying out the first-stage aging treatment and the second-stage aging treatment on the aluminum alloy conductor material, discharging and cooling with air. The manufactured aluminum-silicon alloy can meet the requirements on the aluminum alloy material conductivity and the mechanical property; and moreover, the preparation process is simple, the cost is low, and the mass production is easy to realize.

The invention discloses a method for preparing graphite powder and the equipment thereof and aims at solving the technical problems of improving the purity of graphite powder and reducing cost. The method of the invention comprises the following steps: the raw micro powder is delivered to a graphite crucible under vacuum state and put into a graphitizing furnace; and a graphite powder product is obtained after heat treatment and cooling. The preparation equipment of graphite powder is composed of a vacuum delivery device, a graphitizing furnace and a vacuum discharging device sequentially connected; the graphitizing furnace is equipped with a graphite crucible and connected with a gas filling system. Compared with the prior art, the method and the equipment of the invention are characterized in that the raw micro power is put into the graphite crucible after vacuum delivery, thus the entry of impurities is reduced in the treatment process, the product purity is greatly improved after heat treatment, graphitization is even, the consistency of the product is good, the graphitization and heat treatment efficiency of the powder material is improved, the technique is simple and the cost is low.

The invention discloses a high-temperature-resisting burning erosion resistance alloy, and belongs to the field of alloy preparing. The problems that at present, an eletrodeposited chromium layer is commonly adopted to serve as high-temperature burning erosion resistance coatings of a rapid fire weapon, an artillery pipe and the like, in the chromium plating process of the eletrodeposited chromiumlayer, crystal transfer from hexagonal crystals to cubic crystals happens, the chromium layer is full of micro cracks, peeling is prone to happening, toxic substances need to be used, and certain harm is caused to the environment can be solved. The high-temperature-resisting burning erosion resistance alloy comprises a metallic matrix, an Ni-B composite coating, and an Re-Co alloy coating. The Ni-B composite coating serves as the transition layer of the alloy, the chemical vapor deposition is adopted to deposite the Re-Co alloy coating on the surface of the Ni-B composite coating, the prepared alloy has the good high-temperature-resisting and burning erosion resistance properties. Meanwhile, on the basis of the structural improvement, the phenomenon that during alloy coating preparing, Cimpurities are combined with the metallic matrix is effectively avoided, the coating and the alloy have the extremely good combination force, and cracks, peeling and the like are avoided.

The invention relates to a support of an air suspension and special high-strength cast-state ductile iron of the support. The high-yield-strength cast-state ductile iron comprises chemical componentsincluding C, S, P, Mn, Si, Cr, Sn, Mg, Re and the balance Fe. The support comprises a support body, an air spring supporting face and a middle and rear axle thrust rod base, and the support is of an integral casting structure. Compared with the prior art, according to the cast-state performance, the tensile strength sigma b is larger than or equal to 600 MPa, sigma 0.2 is larger than or equal to 400 MPa, delta is larger than or equal to 10%, the brinell hardness HB is equal to 245-287, the content of a cast-state base body is 80%, the content of cementite is 1%, the yield strength is improved,and the material performance requirement of a structure bearing piece with the medium heavy truck fatigue resisting strength can be met. In addition, the support is of the integral casting structure,welding, forging, punching and other technologies are not needed, respective assembling is not needed neither, cost is greatly reduced, and time is greatly shortened; the effective strength is guaranteed, and meanwhile material stacking is reduced as well; and the space is more compact, the lightweight degree is higher, and the fuel economy of a whole vehicle can be better improved.

The invention provides a high-hardness wear-resistant copper alloy for a plastic mold and a preparation method thereof. The copper alloy is composed of the following components in terms of mass fraction: Mo: 8-10%, Cr: 8-10%, Cu: ≥ 78% And <80%, the remainder is impurities. The invention mainly utilizes the non-equilibrium alloy preparation process of mechanical alloying, so as to realize a large amount of solid solution of Mo and Cr, two alloy elements that are difficult to be dissolved in Cu, and the solid solubility of Cr and Mo in Cu is calculated by mass fraction. More than 8%, in the subsequent hot pressing sintering process, Mo and Cr have a certain degree of dispersion and precipitation. Through the combined action of dispersion and solid solution strengthening, the hardness of the Cu alloy is greatly improved, and the hardness reaches more than 38HRC, and the thermal conductivity reaches The Cu-Cr-Mo alloy above 80W / K·m is a high-hardness copper alloy that can meet the performance requirements of plastic mold materials and does not contain beryllium.

The invention relates to a deicing and anti-icing fluid, particularly a non-Newtonian fuselage deicing and anti-icing fluid and a preparation method thereof. The non-Newtonian fuselage deicing and anti-icing fluid can reduce adhesion of ice on the object surface to eliminate and prevent icing on the aircraft fuselage surface, and has superlong anti-icing retention time. The non-Newtonian fuselage deicing and anti-icing fluid comprises the following components in parts by mass: 40-60 parts of freezing-point depressant, 0.05-1.2 parts of rheologic modifier, 0.01-0.3 part of anti-icing compounding agent, 0.01-3 parts of pH regulator, 0.01-3 parts of corrosion inhibitor, 0.01-0.5 part of staining agent and 40-60 parts of deionized water. The invention is based on the low-temperature rheologic research, especially aims at the low-temperature operating environment and characteristics of the deicing and anti-icing fluid, and determines the distribution and arrangement of the main chain and branch chain of the rheologic modifier as well as the preparation and acquisition method of the low-temperature conformation. By combining the anti-icing compounding agent, corrosion inhibitor and other assistants in the formula, the prepared deicing and anti-icing fluid has the characteristics of excellent shearing restorability, excellent ice adhesion inhibition capacity at 0 to -20 DEG C, and long anti-icing time.

The invention discloses a pseudo-classic building reinforced concrete beam-slab-column ground layer material which comprises 791 glue and Portland cement. The adhesive comprises the following components in parts by weight: 1000g of 791 glue and 2000g of Portland cement, meanwhile, the invention further provides a preparation and use method of the pseudo-classic building reinforced concrete beam-slab-column base material, and the pseudo-classic building reinforced concrete beam-slab-column base material has the advantages of being convenient in material obtaining, simple in process, short in construction period and obvious in effect, and accords with the technological characteristics of Chinese traditional buildings.

The invention discloses a method of stably regenerating gravel from cement. The method includes steps of: 1) preparing raw materials comprising the cement and regenerated crude and fine aggregate; 2) adding the raw materials according to a ratio; and 3) stirring, and adding water to obtain a finished product. The invention also discloses a product obtained by the method. The method is simple in preparation technology, easy to achieve, and high in production efficiency, and can rapidly and stably produce the gravel product with high compressive strength by utilization of the cement. The method has high production efficiency, largely reduced cost, and good economic and social benefit, and protects the environment. The design of the formula is reasonable. The raw materials are easily available. Processes of traditional gravel exploiting are effectively simplified. The compressive strength of the product is high and can meet requirements of buildings with respect to material performances, thus solving the gravel resource shortage problem and achieving objectives of environment protection and sustainable development. The product is easy to construct, shortens the time limit for a project, improves the construction efficiency and facilitates wide popularization and application.

The invention discloses a zirconium-cerium alloy gray iron casting, which is composed of the following components by weight percentage: carbon 3.30%-3.45%, silicon 2.0%-2.2%, manganese 0.7%-0.8%, phosphorus 0.06%-0.1%, sulfur 0.08-0.12%, copper 0.6-0.8%, tin 0.04-0.06%, chromium 0.15-0.25%, zirconium 0.03-0.05%, cerium 0.03%-0.06%, and the balance is iron and casting associated inevitable impurities. The invention can greatly improve the strength and processing performance of thin-walled gray iron castings, and solve the problem that the gray iron castings are easy to break under high-temperature and high-torque working environments.

The invention relates to acid-resistant ultrahigh-strength steel for a deep-sea dynamic flexible vertical pipe and a preparation method of the acid-resistant ultrahigh-strength steel and belongs to the technical field of metallurgy. The steel comprises, by weight percentage, 0.04-0.1% of C, not more than 0.4% of Si, 0.3-1.4% of Mn, not more than 0.02% of P, not more than 0.008% of S, 0.8-2.0% of Cr, 0.8-1.5% of Mo, 0.3-0.8% of Ni, 0.012-0.045% of Nb, 0.01-0.02% of Ti and the balance Fe and inevitable impurities. The preparation method includes: performing smelting, refining and pouring according to the set components to obtain continuous casting billets; secondly, performing heating and heat preservation on the continuous casting billets, and performing multi-pass hot rolling to obtain hot-rolled wire rods; performing multi-pass cold rolling to obtain the Z-shaped steel for a dynamic flexible vertical pipe; thirdly, performing heating and heat preservation on the Z-shaped steel, and performing water quenching to allow the Z-shaped steel reach room temperature; annealing to obtain the ultrahigh-strength steel for the deep-sea dynamic flexible vertical pipe. The microscopic structureof the ultrahigh-strength steel is of a tempered martensite structure, the yield strength of the ultrahigh-strength steel is not smaller than 800MPa, the tensile strength of the ultrahigh-strength steel is not smaller than 880MPa, and the ductility of the ultrahigh-strength steel is not smaller than 10%.

The invention relates to a medium-temperature repairing rubber material and its preparation method and application in propellants, belonging to the technical field of ablation-resistant materials, in particular to a medium-temperature repairing insulation layer material for high-energy propellants, which can be used at medium temperatures Heat insulating layer capable of rapid vulcanization and method for making same. The vulcanization system of the present invention adopts the vulcanization system of peroxide plus accelerator, the heat insulating material is not easy to absorb nitrate, does not affect the ablation performance of the heat insulating layer, and does not affect the interface bonding performance of the high-energy propellant, and the interface with the high-energy propellant has Better adaptability.