90results about How to "Machinable" patented technology

The invention discloses a method for preparing a high-strength solid buoyancy material. The method comprises the steps as follows: a coupling agent in a mass ratio of (0.2:100) with hollow microspheres is adopted to perform pretreatment on 1-20 parts of hollow microspheres; 100 parts of resin, 0-60 parts of a curing agent, 0-15 parts of a toughening agent, 0-5 parts of a dispersing agent and 0-10 parts of a diluent are stirred and mixed to obtain a resin system material, the pretreated hollow microspheres and 1-30 parts of small fiber balls are gradually added into the resin system material step by step, the mixture is slow stirred and uniformly mixed, and original slurry is obtained; and the original slurry enters an injection molding process and is subjected to demolding so as to obtain the high-strength solid buoyancy material. Compared with a traditional solid buoyancy material, the high-strength solid buoyancy material has higher compressive strength, lower density and water permeability and good processability simultaneously.

The invention relates to a weather-resistant heavy-duty anticorrosive powder coating comprising the raw materials in parts by weight: 450-500 parts of hydrogenated bisphenol A epoxy resins, 50-99 parts of curing agents, 0.5-1 part of catalysts, 50-100 parts of zinc-rich fillers, 10-20 parts of self-repairing conductive macromolecule compounds, 190-240 parts of weather-resistant pigments and fillers and 30-50 parts of additives. A preparation method of the coating comprises the steps of putting the raw materials into a high-speed mixer, putting in an extruder after subjecting to dry mixing, carrying out fusion, mixing, cooling and preforming at an extrusion temperature of 80-90 DEG C, grinding by utilizing a grinder, grading, sieving and packaging to obtain finished products of the powder coating. The powder coating disclosed by the invention is mainly applied in the coating of outdoor heavy-duty anticorrosive environments, has excellent anticorrosive performance and weather-resistant performance and is an ideal heavy-duty anticorrosive coating capable of being used for outdoors. Proved by customer use and detection of relevant authoritative departments, the anticorrosive performance and the weather-resistant performance of the coating are excellent and can be completely up to indexes of imported similar products and certain indexes even exceed those of foreign products; the price of the coating is superior than that of the imported products; and therefore, the coating is well received by customers.

The invention provides a cement-based compound material used for a mobile phone shell and a ceramic-based compound material mobile phone shell and a preparation method thereof. The cement-based compound material used for the mobile phone shell is prepared from, by weight, 80-85 parts of ZrO2 nano powder, 8-15 parts of thermoplastic resin, 3-8 parts of a dispersing agent and 3-5 parts of a plasticizer. The cement-based compound material used for the mobile phone shell integrates noble texture of ceramics and toughness and plasticity of macromolecules, and can be machined. Leftover materials can be conveniently recycled, and the cement-based compound material is low in cost and suitable for large-scale industrial production.

The invention provides a high-strength soluble composite material salt core and a preparation method thereof. The salt core is made from soluble metal salt crystal, binder, oxide fiber and metal composite salt; and the preparation method is as follows: the metal salt, the binder, the fiber and the salt crystal are evenly mixed in proportion and then arranged into a die for pressing into salt core blank, then the salt core blank is arranged into a furnace for braking, the salt core after cooling is processed mechanically according to a concrete size, at last, the processed salt core is packaged. The high-strength soluble composite material salt core provided by the invention can bear no more than 200 MPa metal liquid pressure, and can be used for making complex cavities of components by squeezing forging, low pressure forging and metal forging.

The invention discloses a low-density high-strength solid buoyancy material and a preparation method thereof, belongs to the field of solid buoyancy materials for marine environments, and can be used for marine submersible buoys, marine drilling platforms, various deep submergence vehicles, seabed space stations and the like. The low-density high-strength solid buoyancy material comprises the following raw materials in parts by weight: 100 parts of epoxy resin, 0-20 parts of a toughening modification agent, 10-80 parts of a curing agent, 0.5-5 parts of a catalyst, 0.2-10 parts of a dispersion agent, 10-200 parts of micron hollow glass beads, 10-150 parts of millimeter hollow glass beads and 0.2-5 parts of a coupling agent. The preparation method comprises the following steps: adding the accurately weighed raw materials into a kneading machine, heating to 80-100 DEG C, and stirring for 30 minutes at a uniform speed to obtain a mixture; taking out and putting the mixture into a mould, compacting, putting on a pressure curing machine, pressing, heating and deflating, curing for a certain time, and shaping to prepare a buoyancy material standard module. The low-density high-strength solid buoyancy material is used for solving the problem of higher density of a solid buoyancy material and increasing the net buoyancy of the solid buoyancy material.

The invention relates to a carbon foam in-situ reinforced carbon aerogel high-temperature thermal insulation material and a preparation method thereof; the carbon foam in-situ reinforced carbon aerogel high-temperature thermal insulation material has the characteristics of high temperature resistance, low heat conductivity and high strength, and is applicable to thermal protection system of the hypersonic speed aircraft, belonging to the technical field of high-temperature thermal insulation material. The thermal insulation material takes carbon foam which is formed in an in-situ manner as a reinforcing skeleton and carbon aerogel as a substrate, and eliminates pores between the carbon foam skeleton and the carbon aerogel caused by the conventional reinforcing method through a common carbonization; the prepared carbon foam reinforced carbon aerogel has the characteristics of high temperature resistance, low heat conductivity and high strength, and is machinable; the room temperature heat conductivity can be reduced to 0.04W/m.k, and the maximum use temperature in an inert atmosphere can reach 3000 DEG C.

The invention discloses a ternary layered MAX phase material with A site as a magnetic element as well as a preparation method and an application thereof. The molecular formula of the ternary layeredMAX phase material is Mn+1 (AzA'1-z) Xn, wherein M is selected from any one or a group of any two kinds of IIIB, IVB, VB, and VIB; A is selected from any one or a group of any two kinds of IVA, VA andVIA; A' is a magnetic element; X is any one or a combination of any two of C and N elements; z is greater than 0 and less than 1; and n is 1, 2, 3 or 4. The ternary layered MAX phase material has a hexagonal crystal structure, and the space group is P63/mmc; and the cells are formed by atomic alternate stacking of an Mn+1Xn unit and an (AxA'1-x) layer. The ternary layered MAX phase material withA site as the magnetic element has a potential application prospect in the fields of catalysis, wave absorption, spin electronics, energy storage, magnetic refrigeration or magnetic storage and the like.

The invention relates to a binding agent, a preparation method and a grinding wheel, and belongs to the technical field of abrasives and grinding tools. The binding agent is mainly prepared from the following raw materials by mass percent: 70% to 85% of gypsum, 1% to 12% of glass fiber powder and 8% to 18% of clay. According to the binding agent, the raw materials coact with each other in a limited dosage proportion range, so that a compound high-temperature sintered product has relatively high strength, proper hardness and good plasticity; during preparation of the grinding wheel, the binding agent is mixed with water according to a suitable proportion, the forming speed is high, sintering is not carried out in the follow-up steps, and only natural drying or accelerated drying is required; sintering is not required, and the hardening speed is high, so that various problems like cracking and foaming occurring in traditional ceramic bond sintering are avoided; the binding agent is applicable to grinding wheels for low-speed and high-precision grinding, and the prepared grinding wheel is sharp and is high in grinding efficiency; the binding agent is applicable to various abrasives, the holding force for the abrasives is good, and the binding agent has universality; and the raw materials of the binding agent are easy to obtain, the cost is low, and the binding agent is applicable to large-scale industrial production.

The invention discloses a p thermoplastic cellulose composite material and a preparation method thereof. The composite material comprises the following components in percentage by mass: 0.03-28.57% of functional filler, 14.29-69.98% of ionic liquid and the balance of cellulose. The ionic liquid is used as a plasticizer, and can destroy the intermolecular hydrogen bond of the cellulose and increase the free volume, thereby plastifying the cellulose. The preparation method comprises the following steps: plastifying the cellulose by using the ionic liquid as the plasticizer to obtain an ionic liquid-cellulose base material, and carrying out melt compounding with the functional filler. The thermoplastic cellulose composite material can be formed and processed repeatedly, and has high adjustability in selection and proportioning of the composite filler. Compared with the prior art, the method has the advantages of simple technique and high production efficiency, is more suitable for the industrialized production mode, overcomes the defect of single processing means and product form in the past cellulosic material, and widens the application range of the cellulosic material.

The invention discloses polyurethane-based black polymeric dye, a preparing method and application. The preparing method includes the steps that polymer polyol is heated to 90-110 DEG C and dehydrated for 1-2 h with the vacuum degree smaller than or equal to 0.1 MPa, and nitrogen is introduced for protection; the product is cooled to 60-80 DEG C, and isocyanate and a catalyst are added to react for 1-3 h at the temperature of 60-90 DEG C; micromolecular black dye, solvent and a catalyst are added and react for 3-8 h at the temperature of 60-90 DEG C to prepare a polyurethane prepolymer with black dye; chain extender is added and reacts for 1-3 h at the temperature of 50-90 DEG C; finally, the solvent is removed in vacuum. According to the prepared polyurethane-based black polymeric dye, the micromolecular black dye is directly added into the polyurethane chain, the content of the micromolecular black dye in the polyurethane can be adjusted according to needs, and therefore dye amount is controllable to meet requirements of different dyeing processes. The polyurethane-based black polymeric dye can be mixed with other kinds of dye for color matching and is suitable for various kinds of color and luster dying with a wide color spectrum.

The invention discloses a production method for chemically coloring low-chromium stainless steel into black. In the conventional stainless steel chemical coloring, a chromium-iron alloy of which the chromium content is over 13 percent is selected mostly, and a process for using high-temperature and high-concentration chromic acid and sulfuric acid is adopted, so that defects on the aspects of the performance of a black film and color control and the defects of high energy consumption, high pollution, high cost and the like exist. Stainless steel of which the chromium content is 11.7-13 percent is taken as a substrate material, and a chemical coloring liquid of a low-temperature, low-concentration and nontoxic oxidant is adopted; and a black oxide film which is dense on the appearance and has luster is formed on the surface of low-chromium stainless steel, and a corrosion resisting effect which is the same as that of high-chromium stainless steel is achieved.

The invention discloses a low-nickel cast iron material, which comprises the following compositions in weight percentage: 2.0 to 3.6 percent of C, 1.0 to 2.8 percent of Si, 3 to 10 percent of Mn, 3 to 10 percent of Ni, 2 to 5 percent of Cu, 0.05 to 0.5 percent of N, and the balance being iron. The invention discloses a manufacturing method for low-nickel cast iron at the same time, which comprises the following steps: a, preparing a charging material; b, charging the charging material into an intermediate frequency electric furnace to melt, covering the charging material by perlite after the charging material is totally melted; and c, when the charging material is heated to above 1,650 DEG C, removing slag and discharging molten iron; and controlling the cast molten iron at a temperature of between 1,400 and 1,550 DEG C. The invention also discloses application of the low-nickel cast iron to a guide impeller. Combination property and abrasion resistance of the low-nickel cast iron are higher than those of American No. I nickel cast iron, and metallurgical structure and corrosion resistance of the low-nickel cast iron accord with those of the American No. I nickel cast iron.

The invention relates to a manufacturing method of an inner bore cooling polycrystalline diamond (PCD) thread high-speed forming cutter, belonging to the technical field of machining. The method comprises the following steps: carrying out abrasive machining on a hard alloy cutter body, punching cooling bores in the hard alloy cutter body, carrying out PCD chip welding, and finally carrying out wire cutting on the PCD chip by using a slow wire cutting machine, thereby obtaining the cutter. The invention realizes high-efficiency precision manufacturing technique of a hard alloy straight-shank straight-channel welded-type inner bore cooling PCD thread high-speed forming cutter.

The invention discloses an aerated concrete block and a preparation method thereof. The aerated concrete block is prepared from the following components: 250-320kg of cement, 350-400kg of lime, 1400-1600kg of silica sands, 1.45-1.6kg of aluminium powder, 0.195-0.205kg of foam stabilizers and water. The preparation method comprises the following steps: raw material preparing, metering, stirring, pouring into molds, standing and procuring, demolding, lifting to a cutting part for cutting, steam pressure curing in a kettle and finished product warehousing. The block has the advantages of light weight, good thermal insulation property, processability, convenient construction, wide raw material sources, high preparation efficiency, low preparation energy consumption, environment-friendliness and good fireproofing and soundproofing properties, specifically, the bulk density of the block is 500-700kg/m3, which is equivalent to 1/3 of the bulk density of the clay bricks; the block is provided with plentiful pores and micropores inside, thus having good thermal insulation property; the block dispenses with coarse aggregates, thus having good processability, being capable of being sawed, planed, drilled and stapled, being capable of being bonded by bonding materials and providing favorable conditions for building construction.

The invention discloses a (Ti, Cr) 2AlC solid solution composite material and a preparation method thereof. The preparation method comprises the following steps of: performing hot pressed sintering process on Ti power accounting for 40.92-70.11% of the total weight, Al power accounting for 20.15-24.02% of the total weight, C power accounting for 6.99-8.85% of the total weight and Cr2O3 power accounting for 0.88-28.07% of the total weight; and self-generating a granular reinforcement phase in the generation process of a substrate phase by using thermit reaction so as to prepare an aplitic composite material of which the substrate phase (Ti, Cr)2AlC is reinforced with an Al2O3 disperse phase; and performing solid solution strengthening on the substrate phase by using Cr generated by the reaction. Since the material has high composition adjustability, low firing temperature, even and dense structure, lower cost and excellent mechanical property, the application scope of the composite material is widened; in addition, by using the method, the firing temperature and the hot pressing pressure are reduced and micritization of crystals is realized.

The invention discloses a lightweight high-strength elastic ceramic and a preparation method thereof, and belongs to the technical field of porous ceramic preparation, the lightweight high-strength elastic ceramic is formed by bonding ceramic nanowires to form a continuous porous layered network, and the lightweight high-strength elastic ceramic is prepared by taking ceramic nanowire aerogel as a raw material, the preparation method comprises the following steps: forming a layered structure, placing ceramic nanowire aerogel in a mold, and carrying out axial compression; welding the ceramic nanowires, and performing heat preservation treatment in the high-temperature oxygen-free environment, wherein the ceramic nanowires making contact with one another can be welded together through oxide layers on the surfaces of the nanowires so that the lightweight high-strength elastic ceramic is obtained.

The invention discloses a (Ti, Zr)2AlC/Al2O3 solid solution composite material and a preparation method thereof. The method comprises the following steps of: performing a hot-press sintering process on 39.38 to 70.08 weight percent of Ti powder, 20.11 to 22.85 weight percent of Al powder, 6.37 to 8.84 weight percent of C powder and 0.97 to 31.41 weight percent of ZrO2 powder; automatically generating a particle wild phase by using a thermit reaction in the process of generating a matrix phase to obtain an Al2O3 dispersed phase reinforced matrix phase Ti2AlC fine crystal composite material; and performing solid solution strengthening on a matrix by using Zr generated by the reaction. The material has high component adjustability, a low sintering temperature, a uniform and compact structure, lower cost and a high mechanical property, so that the application range of the composite material is widened; in addition, by the method, sintering temperatures and hot-pressing pressure are reduced, and crystal grain micritization is realized in the quick sintering process.

The invention relates to a biodegradable vinasse protein film as well as a preparation method and application thereof, and the vinasse protein film is obtained by processing vinasse protein modified by protein through a film forming technology, the vinasse protein modified by the protein comprises vinasse protein, a plasticizer, a cross-linking agent, a chain extender, a dihydric alcohol oligomer and a water repellent agent. The invention further provides a preparation method and application of the biodegradable vinasse protein film. By modifying the vinasse isolated protein, the vinasse protein not only has the machinability of traditional plastics, but also improves the water resistance and mechanical strength of the vinasse protein film, so that the vinasse protein film better conforms to the characteristics of a film packaging material, is used for replacing a traditional non-degradable plastic film, and helps to solve the pollution problem of the traditional plastics; meanwhile, the application range of the vinasse is also expanded.

The invention discloses a polyurethane based fluorescent whitening agent and a preparation method thereof. The preparation method includes the steps that polymer polyalcohol is heated, vacuum dewatering is conducted for 1-2 hours, nitrogen gas is introduced for cooling, and diisocyanate, solvent and a catalyst are added for a reaction; then, an organic small molecular fluorescent whitening agent body is added, a reaction is conducted, and polyurethane prepolymer with the fluorescent whitening agent body is prepared; water-based chain extender is added into the polyurethane prepolymer, and a reaction is conducted; then, solvent is added to dilute the mixture to certain viscosity, a salt-forming agent is added, and a polyurethane ionomer is formed; the polyurethane ionomer is transferred into an emulsification reactor, then emulgator and water are added, then solvent removal is conducted, and water-based polyurethane based fluorescent whitening emulsion is obtained. The polyurethane based fluorescent whitening agent has the advantages of being high in fluorescence quantum yield, resistant to light, resistant to heat, resistant to washing, resistant to wear, resistant to migration, resistant to wet processing, prone to film formation, capable of being processed and the like and further has the advantages of being good in whitening effect, convenient to use, low in cost, free of toxin, environmentally friendly and the like.

The invention discloses a (Ti, V)3AlC2/Al2O3 solid solution composite material and a preparation method thereof. The preparation method comprises the following steps of: performing a hot pressed sintering process on 51.88 to 73.14 weight percent of Ti powder, 14.05 to 20.23 weight percent of Al powder, 10.23 to 12.28 weight percent of C powder and 0.53 to 17.66 weight percent of V2O5 powder; automatically generating a particle reinforced phase in the process of generating a matrix phase through a thermit reaction to prepare a fine crystal composite material of Al2O3 dispersed phase reinforced matrix phase Ti3AlC2; and performing solid solution strengthening on the matrix phase by using V generated by a reaction. The material has high component adjustability, a low firing temperature, a uniform and compact structure, relatively low cost and a high mechanical property, and the application range of the composite material is widened; in addition, the firing temperature and hot-pressing pressure are reduced and the sitallization of crystal grains is realized during fast firing by the method.