157results about How to "Uniform melting" patented technology

The invention relates to low-cost non-rare-earth type high-strength magnesium alloy and a preparing method thereof. The alloy is Mg-Bi-Ca-Mn magnesium alloy, and is prepared from, by mass, 2-10% of Bi, 0.1-1.5% of Ca, 0.1-1.0% of Mn and the balance magnesium. The novel magnesium alloy is based on a Mg-Bi binary metal series, the element Bi serves as the main alloy element, and the Mg3Bi2 phase with high melting point is contained in the magnesium alloy. Furthermore, the magnesium alloy is evenly dispersed and distributed on a matrix through a simple alloying means, the metamorphism to a second phase by the element Ca and the element Mn and the combination of a plastic deformation processing means so that crystal boundary migration can be effectively pinned in the deformation process to hinder dislocated movement, grains are obviously refined, the strength of the alloy is greatly improved, and thus the ultra-high-strength magnesium alloy is developed in the alloy series.

The invention relates to the field of asphalt. A rubber alloy modifier is obtained with untreated waste plastics and waste tire rubber powder as main raw materials. Modified asphalt which does not affect the rubber/plastic independent modification effects and has good asphalt storage stability and simple production process is finally obtained by utilizing the modifier to modify asphalt. The modified asphalt can be applied to continuous dense gradation of an asphalt mixture. On the premise that the high-and-low temperature performance of the mixture meets the requirement, the water stability is obviously improved, thus achieving effective treatment of two types of polymer waste pollutants such as waste tire rubber powder and waste plastics and change of asphalt properties.

The invention relates to the field of asphalt additives and provides a rubber and plastic alloy asphalt modifier. The rubber and plastic alloy asphalt modifier is mainly made of untreated wasted plastic particles and wasted tire rubber powder and does not damage the individual modification effect of rubber and plastic. The rubber and plastic alloy asphalt modifier is good in asphalt storage stability performance and simple in the production technology. Rubber and plastic alloy modified asphalt manufactured with the rubber and plastic alloy asphalt modifier is applicable to continuously densely prepared asphalt blended materials. Under the condition that the high-temperature and the low-temperature performance of the blended materials can meet the requirements, water stability is obviously improved and two kinds of macromolecule wasted pollutants including wasted tire rubber powder and wasted plastic are effectively processed.

The invention relates to a selective laser melting forming method of an aluminum-silicon gradient material. The selective laser melting forming method comprises the following steps of S1, designing the components and shape of the aluminum-silicon gradient material, and preparing raw materials with different silicon contents according to the weight percentage, wherein the raw materials comprise 22%-70% of silicon and the balance aluminum by weight; S2, smelting the raw materials to obtain aluminum-silicon alloy melts with different silicon contents; S3, preparing aluminum-silicon alloy powder with different silicon contents with the aluminum-silicon alloy melts obtained in the S2 through gas atomization separately; S4, preparing the aluminum-silicon gradient material in the design shape with the aluminum-silicon alloy powder with different silicon contents obtained in the S3 through a selective laser melting technology; and S5, performing heat treatment to the aluminum-silicon gradientmaterial obtained in the S4. The invention further relates to the aluminum-silicon gradient material prepared with the method. The method stated in the invention has the advantages of high designability, simplification of working procedures, high utilization rate of the material, high processing accuracy and the like; and the gradient material stated in the invention is high in designability, andapplicable for electronic packaging shells.

The invention discloses an efficient polymorphous fertilizer special for vegetables, and relates to the technical field of agricultural fertilizers. The efficient polymorphous fertilizer special for the vegetables comprises the following raw materials of: 350-550 parts of urea, 40-150 parts of ammonium nitrate-phosphorus, 0-150 parts of ammonium sulfate, 150-280 parts of potassium sulfate, 100-220 parts of monoammonium phosphate and 0-10 parts of microelement fertilizer; and the raw materials are mixed, pelletized and cooled so as to obtain the polymorphous controlled-release fertilizer. The efficient polymorphous fertilizer special for the vegetables has the advantages of comprehensive and balanced nutrition, and being capable of inhibiting the occurrence of diseases and pests in soil, enhancing the disease resistance of crops, improving the fertilizer utilization rate and effectively enhancing the nutrition quality of the crops.

The invention discloses high-elongation special-shaped polyamide fiber 66 and a production method thereof. The production method includes steps of nylon 66 saline solution, high-temperature concentration, high-pressure reaction, flash depressurization, fusion continuous polymerization, spinning, cooling, oiling, second-time drafting, loosening thermoforming and winding. Formic acid relative viscosity of the polyamide fiber 66 is 72-80, breaking strength is 3.0-4.0g/D, elongation at break is 40-50%, hot air shrinkage percentage of 177 DEG Cx2min is 3.0-5.0%, and monofilament linear density is 6-20dtex. The h igh-elongation special-shaped polyamide fiber 66 has the advantages of moderate strength, light weight, fatigue resistance, impact resistance, wear resistance, softness and easiness in processing, thereby being widely applied in the field of high-grade sports goods; a gap in the high-elongation special-shaped polyamide fiber 66 is filled in, and quality of the polyamide fiber 66 is up to international advanced level, so that the polyamide fiber 66 has high social and economic benefit.

The invention discloses a high-strength refractory six-element high-entropy alloy CoCrFeNiVAlx and a preparation method thereof. The high-strength refractory six-element high-entropy alloy is composedof cobalt, chromium, iron, nickel, vanadium and aluminum which all have the purity of at least 99.9%; and all the elements are calculated according to the atomic percent, specifically, Co is 14-20 at%, Cr is 14-20 at%, Fe is 14-20 at%, Ni is 14-20 at%, V is 14-20 at%, and Al is 0-30 at%. The alloy is prepared through an intermediate alloying method, and the preparation steps include that Co, Ni,Fe and Al which are low in melting point are mixed and molten, Cr and V which are high in melting point are mixed and molten, smelting is performed repeatedly for several times, then two intermediatealloys are smelted, and smelting is performed repeatedly for several times so as to guarantee the uniformity. By means of the high-entropy alloy CoCrFeNiVAlx obtained through the method, the problemsthat Al is prone to being damaged by burning and multi-element alloy smelting is non-uniform can be solved excellently, the strength, hardness and plasticity are high, and the high-strength refractorysix-element high-entropy alloy CoCrFeNiVAlx and the preparation method thereof can be applied to the fields of aerospace, mechanical heavy industries and the like.

The invention provides an inner coating for improving glazing property of turned carbon-containing fireproof material. The coating is prepared by uniformly mixing the following components in percentage by weight: 10-40% of bonder, 1-15% of dispersant, 10-80% of filler made of fireproof material and 10-30% of water. The components of the filler made of fireproof material are consistent to the components of the fireproof material to be turned. The coating provided by the invention mainly has the beneficial effects that the filler made of fireproof material in the using process has the effect of repairing surface pits of the carbon-containing fireproof material so as to further improve the coating of the outer antioxidant coating, so that the glazing and glaze burning condition as well as later burning effect are improved.

The invention relates to a production process of anti-wrinkle soft uniform fabric. Firstly, polyester resin and an auxiliary agent thereof are fused, then extruded and pelletized into polyester chips;secondly, the polyester chips are subjected to a spinning process to form fine-denier polyester staple fibers; thirdly, with blended yarn of conventional polyester staple fibers and carded cotton aswarp yarn and blended yarn of fine-denier polyester staple fibers and combed cotton as weft yarn, the fabric is prepared through a siro spinning and weaving process. The production process has the advantages that according to the anti-wrinkle soft uniform fabric, the fitting surface is soft, comfortable and capable of absorbing moisture and discharging sweat, and the problem of poor comfort of traditional uniform fabric is well solved; the front surface of the fabric is clean, flat, full in granular weave, bright, smooth and soft in luster and smooth and cool in hand feel and has good anti-wrinkle performance, so that daily use and finishing of uniforms are more convenient and simpler; the fabric surface has clear weaves, good stiffness, little hairiness and high strength.

The invention relates to a multi-principal-component medium-entropy alloy and a preparation method thereof. The components of the multi-principal-component medium-entropy alloy are Fe25Ni25Co(50-x)Mox(x being greater than or equal to 0 and smaller than or equal to 50) in atomic percentage. The medium-entropy alloy with the components of Fe25Ni25Co25Mo25 has optical comprehensive mechanical properties: hardness being 411HV, yield strength being 1520 MPa, compressive strength being 2056MPa, and plasticity being 31%. The medium-entropy alloy disclosed by the invention is prepared by an electric-arc smelting method. The preparation method is simplified in process, is relatively low in difficulty and is relatively low in cost.

The invention relates to high-temperature melting equipment and in particular relates to high-temperature melting equipment for preparing nano glass powder. Aiming at solving the technical problems, the invention provides the high-temperature melting equipment for preparing the nano glass powder, which is simple to operate, rapid in melting speed and uniform in melting. In order to solve the technical problems, the high-temperature melting equipment for preparing the nano glass powder, provided by the invention, comprises a left frame, a first bearing seat, a bottom plate, a bracket, a melting box, a discharging pipe, a rocking handle, a first rotary shaft, a winding wheel, a first slide block, a pull wire, a first slide rail and the like; the left frame is welded at the left end of the top of the bottom plate; a left side of the top of the bottom plate is connected with the first bearing seat through a connection manner of a bolt. The high-temperature melting equipment for preparing the nano glass powder has the effects of simplicity in operation, short melting time and uniform melting; a worker can realize rapid melting of glass raw materials through utilizing the equipment; the high-temperature melting equipment is simple and convenient to operate and time and labor are saved.

The invention belongs to the technical field of aluminium alloy and particularly relates to high-strength anodizing die-casting aluminium alloy and a preparation method thereof. Mg, Mn, Fe, Zn, Mo, Zr, Cr and Al constitute die-casting alloy elements, and the high-strength anodizing die-casting aluminium alloy is prepared by a smelting procedure and a die-casting procedure. The types, the contents and the adding modes of all the alloy elements are strictly controlled, so that lots of the elements mainly exist in a matrix in a solid solution format under the die-casting (fast cooling) condition; Zr and Mo ensure more uniform alloy tissue and refined crystal grains, so that the alloy has high strength and favorable die-casing performance and excellent anodizing performance; on a die-casting machine, die-casting molding can be performed by a die to directly obtain the required product without heat treatment or deformation, so that the production cost is greatly lowered; and the high-strength anodizing die-casting aluminium alloy is suitable for thin-walled shell members demanding much on the strength, the die-casting performance and the anodizing demand of the aluminium alloy.

The invention relates to a surface modification method for Mg-Ni-La series hydrogen storage electrode alloy, and belongs to the technical field of metallic functional materials. The method mainly comprises the following steps that a magnesium-nickel-lanthanide series, that is, Mg-Ni-La series amorphous alloy, a silver/graphene nano-composite film, tetrahydrofuran and cyclohexane are mixed so that surface modification treatment can be conducted on Mg-Ni-La series hydrogen storage electrode alloy, wherein the Mg-Ni-La series amorphous alloy is 0.8-1.5 grams, and 1 gram is preferred; the silver/graphene nano-composite film is 0.3-0.7 gram, and 0.5 gram is preferred; the tetrahydrofuran is 1-1.5 ml; and the cyclohexane is 1-2 ml. The Mg-Ni-La series hydrogen storage electrode alloy treated through the surface modification method has the characteristics of being high in electrochemical capacity, good in discharging stability and the like.

The invention relates to a preparation method of chalcogenide glass. The method comprises the following steps: 1) under anhydrous and anoxic conditions, weighing and mixing raw materials for the chalcogenide glass, transferring the mixture of raw materials to a raw material purification-glass forming unit, and purifying; 2) heating to 800-900 DEG C, insulating, fully reacting the glass raw materials to form a glass melt, introducing a protective gas, flowing the glass melt to a glass clarification-homogenization unit through a feeding pipe, mixing, sending the mixture into a glass homogenization-formation unit; 3) cooling to 400-500 DEG C, flowing out the evenly stirred glass melt through a bottom leakage pipe, so as to obtain a formed product; and 4) annealing to obtain the chalcogenide glass. The continuous production of raw material feeding, purification, glass formation, clarification, homogenization and formation improves the optical homogeneity, batch stability, yield and production efficiency of the chalcogenide glass.

The invention relates to a device for preparing a continuous fiber reinforced resin-based composite component. Adopted parts comprise a raw material storing disc, a tension stabilizing device, a feeding unit, a real-time monitor, a compaction roller, a cutting unit, an infrared heater and the like; and the device adopts far-infrared heating, by combining a fiber laying and in-situ solidifying technology, the high-property composite component is quickly manufactured, and the specific working processes are that raw materials are conveyed to the lower end under control of the feeding unit, the materials are molten through infrared heating, then the upper layer and the lower layer are bonded under the effect of the compaction roller, and the whole component is printed in circulating and reciprocating modes. The device can be applied to the basic fields such as aerospace and military national defense, the technological monopoly of foreign countries on China is broken through, and development in the aspects such as quick manufacturing and quick repairing of the composite component for national aerospace is promoted.

The invention relates to high-plasticity magnesium alloy and a preparation method thereof. The alloy is Mg-Bi-Nd-Mn magnesium alloy, and comprises the following chemical components in percentages by mass: 2-8 wt% of Bi, 1.5-4 wt% of Nd, 0.05-0.15 wt% of Mn, and the balance of Mg and inevitable impurities, and moreover, the mass ratio of Bi to Nd equals to 1.3-2: 1. The process is simple, the plasticity of deformed magnesium alloy at the room temperature is excellent, the ductility at the room temperature reaches 43% or above, and meanwhile, the flame retardant property is good.

The invention discloses a linear type efficient electrostatic spinning spray nozzle, which is suitable for the electrostatic spinning of a polymer fusant. The linear type efficient electrostatic spinning spray nozzle comprises a main runner, a crescent runner, a linear nozzle, a diversion trench and a heating and temperature control devices, wherein the polymer fusant enters the crescent runner via the main runner; the fusant can flow to the linear nozzle on a cylindrical wall surface by a crescent flow diversion surface; the polymer flowing out of two sides of the cylindrical wall flows to the bottom end of a horizontal charging barrel via an outer wall surface; secondary shunting of the fusant can be realized by the diversion trench; and after an electrostatic field is added, multiple strands of evenly-injected flows are respectively formed on two sides of the bottom end. According to the linear type efficient electrostatic spinning spray nozzle disclosed by the invention, the problem that materials are left in the nozzle can be solved, and the linear type efficient electrostatic spinning spray nozzle has higher spinning efficiency and is suitable for industrial production.

The invention discloses a smelting furnace for uniform full feeding. A slide rail for passing through the center of a furnace cover is arranged on the inner surface of the furnace cover; a stirring paddle includes a hydraulic rod and a blade connected to one end of the hydraulic rod; a pulley is mounted at the other end of the hydraulic rod, and is slidingly matched with the slide rail; the pulley is connected with a slide motor; the hydraulic rod is an extension rod, and is connected with an extension motor; the inner wall of a furnace body is connected with a cache frame through a spring; the cache frame includes a leakage ring, and a cross bar connected with the inner wall of the leakage ring; and a discharge port of a material channel is positioned above the intersection of the cross bar. The extension motor shortens the stirring paddle, and slides the stirring paddle to one side, so that an aluminum ingot is fully fed in the smelting furnace; the inner wall of the furnace body is connected with the cache frame through the spring; the cache frame includes the leakage ring and the cross bar; and the discharge port of the material channel is positioned above the intersection of the cross bar, so that the fed aluminum ingot is stopped in the intersection of the cross bar, and is rebounded to fall in the smelting furnace by a hole formed by the cross bar so as to prevent nonuniform smelting.

The invention discloses a high-toughness halogen-free low-smoke flame-retardant power tube and a preparation method thereof. Modified resin is prepared from the following raw materials in parts by weight: 75-90 parts of isotactic polyethylene resin, 8-11 parts of ethylene glycol monophenyl ether superfine powder, 4-6 parts of nitrile rubber, 4-6 parts of halogen-free flame retardant powder, 1-4 parts of a synergistic flame retardant and 6-18 parts of ultrahigh molecular weight polyethylene resin. Raw material particles with overlarge particle sizes are conveyed into a material storage box to be crushed again, the screened raw materials are conveyed into a mixing mechanism, the raw materials entering a material mixing tank are mixed uniformly through circular stirring, the raw material particles entering a melting tank are subjected to circular stirring from inside to outside, the melting tank is kept vacuum through a vacuum pump, the melting speed of the raw material particles is increased, and the high-toughness halogen-free low-smoke flame-retardant electric power tube is obtained through extrusion, so that the situation that the performance of the electric power tube is uneven due to uneven raw materials is avoided, and the yield of the electric power tube is greatly increased.

The invention discloses a preparing method for ablation-resistant high-ortho phenolic fibers. A phenolic compound and formaldehyde are mixed according to a certain proportion, then a certain amount of citric acid as a catalyst is added, and a boiling reaction is carried out for 0.5-4 h; diluted concentrated sulfuric acid is added, and the reaction continues for 30-50 min; decompression and dehydration are carried out for 0.5-2.9 h, boric acid accounting for 1-8% by mass is added for a modification reaction after the temperature reaches 90-97 DEG C, and boiling is carried out for 2 h at the constant temperature; decompression and dehydration are carried out, and dehydration is stopped when the temperature of resin reaches 110 DEG C; the resin is subjected to melt spinning at 120-160 DEG C; nascent fibers are put into a prepared curing solution, the temperature is increased to 95 DEG C gradually from the room temperature, and the nascent fibers are naturally cooled to the room temperature after constant temperature is achieved; the temperature is gradually increased for thermosetting under the nitrogen condition. The fiber strength of the high-ortho phenolic fibers ranges from 3 cN/dtex to 36 cN/dtex, the modulus ranges from 40 cN/dtex to 400 cN/dtex, and the cross-linking degree ranges from 32% to 38%.

The invention mainly relates to the technical field of machining of artificial boards and discloses a preparation method of a high-strength veneer board for a packaging box. The preparation method comprises the following steps: heating, immersing, freezing, gluing, carrying out hot pressing and trimming. The method is simple; the strength of the obtained high-strength veneer board for the packaging box is remarkably improved and the bearing capability reaches 5173kg; a wood core veneer is sufficiently heated and dried and the moisture content is lower than that of conventional wood, so that an adsorption capability of the core veneer on a subsequent treatment solution can be improved and the production efficiency is improved; a face veneer is heated and subjected to heat insulation, so that the weather resistance and wearing resistance of the face veneer can be improved and the service life of the veneer board is prolonged; the core veneer is a poplar board and has the advantages of wide raw material source, low price and strong buffering capability; the face veneer is an ecological resin board added with sodium carbonate and the face veneer is safe and has no toxin and has strong bearing capability and buffering capability, so that the durability of the veneer board is improved and the service life is prolonged; the veneer board can be recycled and repeatedly utilized so that the environment is protected and the cost is saved.