6419results about How to "Add less" patented technology

A metallurgical V-N microalloying and compound deoxidation cored wire contains a core wire and a cladding steel belt. The technical key point of the cored wire is as follows: the core wire of the cored wire consists of a vanadium-increasing agent, a nitrogen-increasing agent and a deoxidizing nitrogen-fixing agent of which particle sizes are less than 6mm, wherein the vanadium-increasing agent is ferrovanadium, nitrided ferrovanadium or vanadium pentoxide; the nitrogen-increasing agent is ferrosilicon nitride, silicomanganese nitride, ferromanganese nitride, ferrochromium nitride, silicon nitride, aluminum nitride or calcium cyanamide; and the deoxidizing nitrogen-fixing agent contains one or more of aluminum, calcium, magnesium and barium, and can also contain one or more of titanium, zirconium, niobium, manganese, chromium, silicon, carbon and iron. By adopting the cored wire, the V / N ratio of steel can get closer to the optimal proportion, the enhancing function of vanadium can be utilized furthest, vanadium resources can be saved, the recovery rate of nitrogen is high, the nitrogen content is stable, the compound deoxidation function can also be realized, the V-N microalloying cost can be reduced and the quality of steel can be increased.

The invention relates to an anti-bacterial thermoplastic composite, which comprises the following mixed components: 100 parts of thermoplastic by weight and 0.1-40 parts of composite antibacterial agent by weight, wherein the composite antibacterial agent comprises micronano inorganic / organic particles and guanidinesalt polymers which are coated on the surfaces of the micro / nano particles and / or embedded among pores and layers of the micronano particles; the weight ratio of the guanidinesalt polymers to the micro / nano particles is 1:1-1:50; and the micro / nano particles have at least a one-dimensional average size of 1nm-1000mum. The anti-bacterial thermoplastic composite is obtained by melting and mixing the components such as the thermoplastic, the composite antibacterial agent, and the like, therefore the antibacterial rate of the anti-bacterial thermoplastic composite is higher and the preparation method is simple.

This invention relates to a method for modifying functional coating layer with gradient filler dispersion, and its application. The coating is waterborne or solvent-type, and utilizes paramagnetic motion of paramagnetic metal and nonmetal particle filler during the dispersion of the coating to realize gradient distribution under magnetic force. The method can realize special functionality of the coating layer by controlling the variety of the magnetic filler, particle morphology and addition amount. Within the coating layer, paramagnetic particles aggregate near the substrate, thus can solve the heat expansion difference between the coating layer and the metal substrate, and can ensure the excellent chemical properties of the organic film-forming material. The magnetic filler aggregating at the surface of the coating layer can obviously increase the hardness, wear resistance and microwave absorbency of the coating layer. In strong magnetic field, the paramagnetic arrangement of neddle-like magnetic particles changes the heat-conductive passage of the coating, and can largely improve the heat-conductivity of the coating.

The invention relates to a feed for early weaned piglets, which belongs to the field of the feed. Main ingredients of the feed comprise expanded corn, full-fat soybean, fat powder, steam fish meal, acidified whey powder, fermented soybean meal, a complex enzyme preparation, a micro-ecological preparation, amino acids, complex vitamins, complex trace elements and the like. The digestive physiological characteristics of the weaned piglets are fully considered on the selection and the processing of raw materials, thereby greatly improving the palatability and the digestion rate of the feed; simultaneously, through the synergistic compatibility of an egg yolk antibody, lactein, sodium humate and the complex micro-ecological preparation, the diarrhea rate of the weaned piglets is reduced, the effects are superior to those of adding antibiotics into the feed, and the feed is the green, environmentally-friendly and nuisanceless feed. An animal feeding experiment proves that the feeding effects are ideal, the palatability is good, the piglets after weaning are high in average feed intake, fast in daily weight gain and low in diarrhea rate, and the feed has a good promoting effect for growth and health conditions of the weaned piglets and can meet the demands of most of raisers at present.

The invention discloses a fire-proof adhesive and application thereof. The fire-proof adhesive comprises the following components by parts: 100 parts of high-temperature bonding agent, 10-70 parts of fire retardant, 0.5-50 parts of flame retardant synergist, 5-50 parts of strength enhancer, 0.05-20.0 parts of water-proof modifying agent and 0.01-2.0 parts of curing modifying agent. By adopting the fire-proof adhesive and a preparation method of a fire-retardant EPS (Expandable Polystyrene) foam heat-insulating plate, the combustion performance and physicochemical performance of the fire-retardant EPS foam heat-insulating plate can be improved remarkably. For example, the heat-conducting coefficient can be lowered below 0.055w / m.k, the specific gravity can be lower than 150Kg / M<3>, the compressive strength is higher than 150KPa, and the heat value is less than 3MJ / kg.

The invention relates to high-efficiency hydrate inhibitive environment-friendly drilling fluid, and particularly relates to the drilling fluid containing water, bentonite, hyamine dimeric surfactant, inorganic salt, sodium carboxymethyl starch, cationic polyacrylamide and solid anti-sloughing lubricating agent GFRH. The high-efficiency hydrate inhibitive environment-friendly drilling fluid can be used for exploiting continental or ocean oil-gas resources and can effectively inhibit the generation of hydrate; moreover, the components of the drilling fluid are small in environment harm, and the drilling fluid has the advantages of high efficiency and environmental protection.

The invention discloses a microencapsulation expansion type flame retardant and application in an epoxy resin composite material thereof. The microencapsulation expansion type flame retardant uses ammonium polyphosphate as a capsule core and uses a thermosetting resin melamine-formaldehyde resin as a capsule material. The microencapsulation expansion type flame retardant epoxy resin composite material consists of the epoxy resin, a curing agent, a curing accelerator, the microencapsulation expansion type flame retardant and a flame-retardant carbon-forming accelerator. The microencapsulation expansion type flame retardant and the application are economic, simple and convenient; the flame retardant has good flame-retardant synergistic effects; and under the condition of little flame retardant addition, the composite material can pass V-0 level of UL-94 test, and the oxygen index reaches over 30.0 percent.

The invention provides a compound antimicrobial and a preparation method thereof. The compound antimicrobial comprises micro-nano particles and guanidine polymers by the weight ratio of 1:1 to 1:50, wherein the micro-nano particles at least have the one-dimensional average dimension of 1nm to 1000 mu m; the guanidine polymers are coated on the surfaces of the micro-nano particles and / or embedded in holes or among layers of the micro-nano particles; inorganic or organic particles comprising micro-nano particles are added to a solution of the guanidine polymers; organic alkali is added or not added; the particles and the solution are uniformly mixed and dried for obtaining the compound antimicrobial. When applied to plastics, fibers and rubber, the antimicrobial has high sterilization efficiency, also largely reduces the processing cost of antibacterial materials, and has simple and convenient preparation method.

The present invention relates to an active peptide feed addictive, as a mixture of one or more plant protein and animal protein, which is the product of the following steps: fermenting and degrading the mixture through bacillus and the like, controlling the degree of hydrolysis at 20-35%, obtaining a fermentation supernatant after a separation post-processing process, concentrating drying the supernatant or directly adsorbing the supernatant onto the carrier, and then low temperature drying it. Said active peptide feed addictive is capable of obviously depressing development of bacillus coli and salmonella, and can prevention and cure diarrhea caused by bacilli or lienteric diarrhea; can exert its functions at a very low concentration, with a very intense effect; can regulate stomach and intestine bacterium group and promote animals digestion functions; can excite animal immune function, reinforce animal disease resistance against a plurality of epidemic diseases and greatly reduce the morbidity and death rate; can promote animal development and improve the growth velocity; can improve the feed use ratio and reduce production costs. Applications of the microorganism fermentation degradation method provided by the present invention have a low fabricating cost, and the obtained peptides have many kinds and high content, without environment pollutions.

The invention discloses an insulating and sheathing material of ultraviolet light crosslinking expanding type phosphorus nitrogen flaming resistance polyolefine cables and a preparation method thereof. The invention is characterized in that polyethylene / PEMA and / or ethylene vinyl acetate or maleic anhydride grafted ethylene vinyl acetate or acid amide grafted ethylene vinyl acetate copolymer are taken as base, added with expanding type phosphorus nitrogen halogen-free flame retardants, light trigger, polyfunctional group cross linker and chemical inhibitor and matched with flaming retardant synergistic agent, antismoke agent and processing aid, and then squeezed out and pelleted into photo-crosslinking flame retardant cable materials; and then the flame retardant cable materials are melted and extruded on a cable conductor wire core and clad into an insulating layer and a sheathing layer; hereupon the ultraviolet light irradiation crosslinking is carried on the insulating layer or the sheathing layer. Via detecting, the oxygen index of the insulating layer or the sheathing layer is larger than 30%, the vertical flaming experiment passes through UL-94 V0 level, the tensile strength is larger than 12Mpa, the elongation at break is larger than 350%, and the electric volume resistivity is larger than 8*10 omega.cm.

The invention discloses a method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in an evaporation manner and a device of the method. The method particularly includes steps that agglomeration liquor prepared by desulfuration wastewater, high polymer adhesive and wetting agent is sprayed into an inlet flue of an electric precipitator and is evaporated by the aid of heat of flue gas, in an evaporation process, the wetting agent promotes dust to enter drops of the agglomeration liquor, the high polymer adhesive is connected with PM2.5 via a polymer chain with polar groups, the grain diameter of the PM2.5 is prompted to be enlarged, so that the PM2.5 can be gathered by the follow-up electric precipitator, the desulfuration wastewater is evaporated completely, suspended matters and dissolvable pollutants in the wastewater are converted into solid to be dissolved out, and the suspended matters and the dissolvable pollutants in the wastewater, together with dust in the flue gas, are gathered by the electric precipitator. The device consists of a boiler, an air preheater, the electric precipitator, a desulfurizing tower, a hydraulic cyclone, a desulfuration wastewater clarification tank and an agglomeration liquor preparation tank, and a double-fluid atomizing nozzle is arranged in the flue between the air preheater and the electric precipitator.

The invention provides a preparation method of a graphene based reinforced and flame-retarded recycled polyester staple fiber. The method comprises the following steps: preparing graphene master batch; preparing phosphate based halogen-free flame retardant master batch; weighing the graphene master batch and the phosphate based halogen-free flame retardant master batch, mixing with a recycled polyester raw material, drying, feeding molten dried raw materials into an impurity removal stirrer under the action of a screw extruder by a melt pump for carrying out homogenization impurity-removal treatment, feeding a homogenized and impurity-removal polyester melt into a secondary filter by the melt pump, enabling a filtered melt to pass through a mixed melt on a pipeline to enter a spinning manifold, carrying out drafting processing on a spun fiber to obtain the reinforced and flame-retarded recycled polyester fiber, cutting off bundles and packaging. The reinforced and flame-retarded recycled polyester chip has the good spinning forming property, the fiber quality is high, the using amount of a fire retardant can be effectively reduced under the synergistic effect of grapheme and the phosphate based flame retardant, the cost is reduced, the reinforcement effect can be achieved and the mechanical property of the fiber is effectively improved.

The invention provides a high strength low alloy steel plate suitable for high heat input welding and is characterized in that the chemical composition (wt percent) of steel comprises 0.04 percent to 0.16 percent of C, 0.10 percent to 0.50 percent of Si, 0.40 percent to 1.8 percent of Mn, 0.020 percent to 0.050 percent of Nb, 0.006 percent to 0.030 percent of Ti, 0.0030 percent to 0.010 percent of N, 0.015 percent to 0.060 percent of Al and the rest, Fe and other inevitable impurities; meanwhile, C+Mn / 6+Si / 24+Ni / 40+Cr / 5+Mo / 4+V / 14 is less than or equal to 0.45 percent and the total amount of Ti and the total amount of N are that [Ti percent]T is more than or equal to 2.667[N percent]T-0.004667 percent; moreover, Ti microalloying is adopted to ensure that the Ti / N ratio in the second sort of particle generated ranges between 2.4 and 3.2. The manufacture method of the steel plate adopts austenite recrystallization zone and austenite non-recrystallization zone rolling and forced water cooling after rolling; moreover, when the steel plate is under 50 KJ / cm to 150 KJ / cm high heat input welding, the welding heat affected zone has excellent toughness. The invention has the advantages of simple production process, low cost and wide applicability.

The invention discloses a flame retardant cellulose fiber and a preparation method thereof. The fiber has the components of fire retardant and cellulose which have the mass ratio of 10-25:100; wherein the fire retardant is novel phosphorus fire retardant having the average grain diameter being less than 1mum; the cellulose is wood pulp or cotton pulp having the polymerization degree of 400-1000 and alpha-cellulose content being more than or equal to 90%. According to the components with the mass ratio of the fiber, the preparation method of the fiber comprises the technique as follows: 1. preparation of flame retardant spinning solution as the following: according to the mass ratio, firstly adding the fire retardant into ionic liquid at the normal temperature, and leading the fire retardant to be uniformly dispersed in the ionic liquid under mechanical agitation; then adding the cellulose into the mixed ionic liquid to be fully dissolved with the dissolving temperature of 70-110 DEG C to prepare flame retardant spinning solution; ensuring the mass ratio between the cellulose and the ionic liquid to be 5-35:95-65: 2. preparation of the flame retardant cellulose fiber: preparing the flame retardant cellulose fiber according to the conventional spinning process flow.

The invention relates to a high-photoelectric-conversion-efficiency crystalline silicon solar battery aluminum paste, which consists of the following raw materials by mass percent: 60-70 percent of aluminum powder, 20-35 percent of organic bond, 1-10 percent of aluminum-silicon alloy powder, 0.2-2 percent of glass powder and 0.1 to 1.5 percent of adjuvant, wherein the sum of the mass percent of the raw materials is 100 percent, the content of aluminum contained in the aluminum-silicon alloy powder is 8-15 percent and the average grain size of the aluminum-silicon alloy powder is small than 2mum. The invention additionally provides a preparation method for the crystalline silicon solar battery aluminum paste. After the paste is screen-printed, dried and sintered, an aluminum back surface field is formed on a silicon wafer. The adhesive force of the aluminum back surface field is high, the warping degree of cells is low, the photoelectric conversion efficiency is high, the cost is low and the aluminum paste is nontoxic.

The invention relates to a halogen-free intumescent flame retardant wire / cable insulating material composition. The formula of the materials of the composition is as follows: 60 to 80 percent by mass of polyolefin; 15 to 35 percent by mass of halogen-free intumescent flame retardant; 2 to 10 percent by mass of synergist; 1 to 10 percent by mass of compatilizer; 0.1 to 1 percent by mass of lubricant; and 0.1 to 1 percent by mass of antioxidant. Compared with the prior art, the composition has the advantages that: dosage is low, the flame-retardant property is high, no harmful substances are released and the color cannot be changed in the process of processing and use, and precipitation resistance and water resistance are good. The composition has good flame-retardant property and toughness, and is particularly suitable for use in the fields of wires / cables, electronics / electricity, house decoration, automobile industry and the like which have strict requirement on flame retardance.

The invention relates to a method for treating organic amine industrial waste water by Fenton-like oxidation-flocculation. According to the method, the pH value of the waste water is adjusted to 3-5, and the temperature of the waste water is adjusted to 20-40 DEG C; a catalyst is added, wherein active ingredients of the catalyst comprise: ferrous sulfate, anhydrous cupric sulphate and manganese sulfate monohydrate, wherein the mass ratio of the ferrous sulfate to the anhydrous cupric sulphate to the manganese sulfate monohydrate is (5-10):1:(0-5); H2O2 (30%) is added, and the oxidation reaction time is 4 hours; after completing the oxidation reaction, sodium hydroxide is added to adjust the pH value of the waste water to 8-10; adding a chemical coagulant and an organic polymer flocculant, such that partial suspended solids, colloids and partial organic amines in the waste water are concurrently coagulated. According to the present invention, the Fenton-like oxidation-flocculation is adopted as the pretreatment for the organic amine waste water, such that the organic amines in the waste water can be effectively removed, the poison and the impact on microorganisms due to the high concentration organic amines in the wastewater can be reduced, the subsequent biological treatment is easily performed for the sewage.

The invention discloses a water-based antimicrobial moldproof hydrophilic paint for heat exchanger fin surface treatment. The paint comprises 3-30% of high molecular compound containing hydrophilic group, 0.05-1% of inorganic nano material with antibacterial action, 0.3-5% of curing agent, 0.02-0.2% of leveling agent and 2-10% of cosolvent. The inorganic nano material with antibacterial action is composed of 2-10% of nano oxide, 0.1-2% of silver salt or nano silver solution, 0.1-2% of reducer, 0.1-1% of stabilizer and the balance of water. Since the inorganic nano material with antibacterial action has high stability in the system, the antimicrobial and moldproof properties and hydrophilicity do not attenuate after the processing technique, and can last for a long time in the application process. The paint has the advantages of low addition amount and high cost performance, and does not influence the later working properties.

The invention discloses an anti-oxidative color masterbatch. The anti-oxidative color masterbatch comprises the following raw materials in percentage by weight: 10-70% of pigment, 1-22% of antioxidant composition, 5-30% of dispersion and lubrication agent, 20-60% of carrier resin and 0-15% of filler, wherein the antioxidant composition comprises a hindered phenolic antioxidant and one or more of a phosphite antioxidant, a thio antioxidant and a light stabilizer. The invention further discloses a preparation method and application of the anti-oxidative color masterbatch. The anti-oxidative color masterbatch disclosed by the invention has the advantages of good uniformity, good stability, good processability, good mobility and good heat and weather resistance; the preparation method of the anti-oxidative color masterbatch has the advantages of simplicity, no pollution to factory buildings and no pollution to operating personnel; and during use, the dispersion is easy, the adding dosage is small, the service lives of plastic products can be prolonged remarkably, the brightness of colors of the plastic products can be increased, and the fading time of the plastic products can be delayed.

The invention discloses a composition of a color high-concentration mono-color master batch for polyolefin. Carrier resin is polyolefin resin, and the polyolefin resin comprises metallocene polyolefin resin. The composition further comprises a toner and an additive, wherein the additive comprises a dispersing agent, a lubricating agent, a coupling agent, a compatilizer and a stabilizer, or a mixture of at least two of the dispersing agent, the lubricating agent, the coupling agent, the compatilizer and the stabilizer. The metallocene polyolefin resin is introduced for serving as carrier resin, and the toner and the conventional additive are added, so that the color high-concentration mono-color master batch is obtained. The mono-color master batch can be directly added during production of a polyolefin product, and different types of color high-concentration mono-color master batches can be matched and toned freely according to the color requirements of products, so that the dependence of toning and color control on a color master batch manufacturer is lowered greatly. The color high-concentration mono-color master batch has high dispersivity, is free from dust, and does not pollute production environments.

The invention discloses an application of hyperbranched polyester to plastic processing, and belongs to the technical field of plastic processing assistants. The application of the hyperbranched polyester to plastic processing includes the steps that by mass, 0.1% to 5% of the hydroxyl-terminated hyperbranched polyester is added into plastic; the mixture is mixed to be even, extruded, prilled and dried, and a modified plastic product is obtained. According to the application, the plastic such as PPC and the hyperbranched polyester are melted and blended, and the plastic such PPC is modified through a double-screw extruder; after the hyperbranched polyester is added into a base material of the plastic such as PPC, the effective melt viscosity of the plastic such as PPC can be remarkably reduced; in other words, processing temperature and thermal degradation are reduced; in addition, melting fluidity improved in this way can also be achieved through the small adding amount,, and extruding film forming can be more easily achieved; the tensile strength of the modified plastic such as PPC is up to 30 MPa, and the strength can be higher than the strength of thin-film-level LLDPE and the strength of thin-film-level PVC.

The invention relates to the field of high-molecular composite materials, and concretely relates to a heat-conduction epoxy resin composite material and a preparation method thereof. The heat-conduction epoxy resin composite material comprises the following compositions in parts by mass: 0.5-3.0 parts of carbon nanotubes, 0.5-10.0 parts of nanometer aluminium nitride, 0.1-1.0 part of a silane coupling agent, 0.1-0.5 part of stearic acid, 60-80 parts of epoxy resin and 8-30 parts of a curing agent. According to the preparation method, amino-functionalized carbon nanotubes and nanometer aluminium nitride subjected to surface modification by employing a coupling agent are dispersed in epoxy resin, so that the epoxy resin material with heat-conduction function is prepared, the operation technology is simple, on the one hand, the heat conduction performance of the material is guaranteed, and on the other hand, the cost is reduced. The addition amount of functional materials employed by the composite material is less, the stability of the product is good, and the composite material is applicable to electric appliances, electron heat radiation and other aspects.

The invention discloses a method for preparing antarctic krill low-fluorine hydrolysis polypeptide. The method comprises the following steps of: performing enzymolysis on antarctic krill powder used as raw materials, heating and inactivating enzyme, centrifuging, adding calcium oxide at different concentration, defluorinating, uniformly stirring, performing centrifugal separation, adjusting a solution until the solution has a certain pH value, and performing spray drying on supernatant obtained through separation to obtain the antarctic krill low-fluorine hydrolysis polypeptide of which the fluorine content is 10 to 30ppm. The process is easy to operate, the obtained product has low fluorine content, the nutrition constituents are damaged slightly, consumed time is short, and the process is simple and efficient, and is an ideal method for removing fluorine from enzymatic hydrolysate. The method lays the foundation for developing the multi-functional antarctic krill low-fluorine polypeptide.

The invention discloses microspherical SiO2 aerogel compound heat-insulating / warm-keeping external wall paint and a preparation method thereof. The paint comprises the following components: 1-20 parts by weight of microspherical SiO2 aerogel powder, 10-20 parts by weight of titanium white, 10-20 parts by weight of water-based emulsion, 20-35 parts by weight of filler and 20-30 parts by weight of other paint assistant. According to the invention, the microspherical SiO2 aerogel and the titanium white are compounded, so that the paint has low heat transfer coefficient and high sunlight reflectivity, thus ensuring that the paint has excellent heat-insulating / warm-keeping property; meanwhile, the directly prepared hydrophobic SiO2 aerogel is micron-level microspheres of 1-50 mu m, thus avoiding causing the problems on defoaming and flowability to paint production in the efflorescence process of large aerogel; and the addition of the hydrophobic microspherical SiO2 greatly enhances the brushability of the paint.

The invention discloses an aqueous two-component wood varnish and application thereof. The aqueous two-component wood varnish mainly comprises a main agent and a curing agent. The main agent comprises the following components in percentage by mass: 60-80% of emulsion containing hydroxyl polymer, large than 0 and less than or equal to 6% of polycarbodiimide cross-linking agent. The curing agent mainly comprises the following component in percentage by mass: 80-85% of water dispersible polyisocyanate. By adopting double cross-linking, a varnish film with sensory effect and final performance better than that of a one-component aqueous self-crosslinking paint and an ordinary two-component aqueous paint is obtained; the varnish has the advantages of quick varnish film drying speed, quick performance improving speed, excellent varnish film performance and small dosage of aqueous isocyanate. The aqueous two-component aqueous varnish can be used as surface paint in match with the one-component priming paint which is excellent in initial water resisting property and quick in hardness improvement, thereby achieving the coating effect and performance of the conventional two-component aqueous paint at lower cost.

The present invention relates to one kind of nanometer inorganic matter / polymer composite insulating paint for electric power apparatus and protecting equipment and its preparation process, and belongs to the field of chemical paint technology and electric insulating technology. The paint consists of one to three kinds of nanometer inorganic materials, including SiO2, TiO2, Al2O3, ZnO, CuO and Fe2O3; one polymer of epoxy resin, polyimide and organopolysiloxane; and coupling agent, in the weight ratio of (1-8) to 100 to (0.02-0.08). Its preparation process includes mixing the nanometer particle with coupling agent, adding the polymer, adding organic solvent, ultrasonic dispersing at 50-100 deg.c to obtain stable suspension, and vacuum treatment at 80-120 deg.c to eliminate solvent and gas to obtain the composite insulating paint. The composite insulating paint may be cured at 120-300 deg.c for 5-18 hr to obtain insulating coating.

The invention discloses graphene oxide modified compound type heat conducting silicone rubber and a preparation method thereof. According to the preparation method, the compound type silicon resin with high heat conduction property and low expansion factor is prepared by using 0.5-1 part of graphene oxide as heat conducting stuffing and an inorganic crosslinking agent, 10-50 parts of nanometer SiO2 as the heat conducting stuffing, 5-30 parts of compound of two MQ silicone resin containing hydroxyl and vinyl and different in viscosity as a special bonding modifying agent, 1-10 parts of organic hydrogen polysiloxane as an organic crosslinking agent, 0.1-2 parts of platinum complex as a catalyst, 0.01-0.001 part of alkynol substance as an inhibitor and 60-100 parts of polysiloxane resin as base rubber and adopting a nanometer compounding method, wherein the graphene oxide is partially modified by a silane coupling agent, and the nanometer SiO2 is prepared by a sol-gel method. The compound type silicon resin can be widely applied to encapsulation of various electronic components and plays a role in shock absorption and heat dissipation.

The invention relates to a high-speed steel roll and a preparation method thereof by centrifugal compounding in an electromagnetic field, belonging to the technical field of preparation of the high-speed steel roll. The components of a working layer material of the high-speed steel roll are as follows (in weight percent): 1.5 to 2.5 percent of C, 4.0 to 6.0 percent of V, 4.0 to 6.0 percent of W, 1.5 to 4.5 percent of Mo, 2.0 to 4.0 percent of Cr, 0.04 to 0.18 percent of Zr, 0.001 to 0.003 percent of B, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of Mn, and the balance of Fe and impurity elements; and in the impurity elements, the required contents of S, P and O are respectively less than 0.01 percent, less than 0.01 percent and less than 0.0010 percent. The roll is cast by adopting a centrifugal compounding method in a pulse electromagnetic field, the frequency of the pulse magnetic field is 0.1 to 10Hz, and the peak strength of a central magnetic field of a cast mold is 1 to 10T. The roll has a plurality of precipitation strengthening phases, and the applied pulse magnetic field leads the strengthening phases and matrix crystal grains to be refined effectively and leads the strengthening phases to be distributed in a dispersed manner, thus overcoming the segregation of alloy elements and greatly improving the performance of the roll.

The invention relates to plastic forming technology and powder metallurgy technology, in particular to a tungsten carbide particle-enhanced iron-based powder metallurgy material and a preparation method thereof. According to a specific formula, the iron-based powder metallurgy material comprises the following components in percentage by mass: 85.0 to 90.0 percent of matrix material and 10.0 to 15.0 percent of enhanced phase tungsten carbide, wherein the matrix material comprises the following components in percentage by mass: 1.4 to 2.0 percent of copper, 1.7 to 2.0 percent of nickel, 0.9 to 1.2 percent of molybdenum, 0.7 to 1.6 percent of carbon and the balance of iron. In the invention, quick spark plasma sintering is adopted; and the obtained material has the characteristics of nearly full densification, high hardness, high indoor temperature bending strength, high high-temperature mechanical property and the like, can be used as a wear-resistant material, a tool material and the like, and can reduce the dependency of Chinese tool material production on import of precious metals such as vanadium, chromium and the like. The material has high cost performance and a good industrial production prospect.

The invention discloses a high-strength cold-rolled hot-galvanized dual-phase steel plate, characterized in that components, in mass percentage, are: 0.03% to 0.15% of C, less than or equal to 0.15% of Si, 1.00% to 1.75% of Mn, less than or equal to 0.015% of P, less than or equal to 0.012% of S, 0.02% to 0.15% of Al, 0.35% to 0.75% of Cr, 0.02% to 0.15% of Cu, 0.010% to 0.035% of Ti, less than or equal to 0.005% of N, in addition meeting the requirement that the total percentage of Mn, 1.29Cr and 0.46Cu is not less than 1.5% and not more than 2.5%, and the balance being Fe and inevitable impurities. The manufacture method comprises converter smelting, secondary refining, continuous casting, hot continuous rolling, cold acid continuous rolling, annealing galvanizing and hot dipping, wherein a galvanized substrate with a reasonable organization and composition and an excellent plate shape is obtained through controlled rolling and controlled cooling while rolling; and through employing a micro-slowly cooling way for heating from an end segment to an isothermal segment and a secondary fast cooling way for a fast cooling segment during continuous annealing galvanizing, the cold-rolled hot-galvanized dual-phase steel plate is obtained, wherein the steel plate is advantageous by having a tensile strength between 490 to 700 MPa, well-matched strength and ductility, an excellent coating performance, and a thickness between 0.5 to 2.5 mm, and can be used as an automobile cover component, an inner plate, a structural component, etc.