25 results about "Boron" patented technology

The invention relates to a mobile roller-type van-type heating furnace and a hot-forming subsection strengthening technique. The mobile roller-type van-type heating furnace comprises a shell, heat preservation cotton is arranged on the inner side of the shell, and a furnace door is arranged on one side of the shell. The mobile roller-type van-type heating furnace is characterized in that the shell is divided into multiple areas through one or more isolation doors, and the upper portion of each isolation door is connected with a piston rod of a telescopic cylinder. The hot-forming subsection strengthening technique is characterized by comprising the steps that 1, a boron steel workpiece is led in a furnace chamber inside the shell through rotary rollers at room temperature; 2, the contraction cylinder descends to make the lower end of the isolation door be 5-50 mm away from the workpiece; meanwhile, the isolation door divides the furnace chamber into a hard area and a soft area, the hard area is heated to be 880-930 DEG C, and the soft area is heated to be 500-800 DEG C; 3, when the workpiece is heated to be a specified heating temperature, the workpiece is led out from the heating furnace through the rotary rollers, and hot-forming punching and cooling are conducted on the workpiece. By means of the mobile roller-type van-type heating furnace and the hot-forming subsection strengthening technique, subsection strengthening production of workpieces can be achieved.

The invention discloses a boron-bearing chromium molybdenum nickel wear-resistant alloy comprising the following chemical components: 0.30-0.50% of C, 0.8-2.6% of B, 0.5-1.8% of Mn, 0.4-1.0% of Si, 4.0-6.0% of Cr, 2.0-4.5% of Mo, 0.8-2.0% of Ni, 3.5-5.5% of V, 0.02-0.04% of Ce, 0.02-0.04% of La, 0.10-0.20% of Mg, 0.01-0.03% of Ca, 0.05-0.10% of Ba, 0.040 or less of S, 0.040 or less of P, and balance of Fe and unavoidable impurities; the preparation steps include melting and heat treatment; the present invention aims to provide the boron-bearing chromium molybdenum nickel wear-resistant alloy which is safer, more wear resistant, and better in toughness, and also aims to provide a preparation method which is simple and easy to operate, simple in technological process and low in cost for preparation of the boron-bearing chromium molybdenum nickel wear-resistant alloy.

Provided are an apparatus for manufacturing a compound powder, a method of manufacturing an iron-boron compound powder by using the apparatus, a boron alloy powder mixture, a method of manufacturing the boron alloy powder mixture, a combined powder structure, a method of manufacturing the combined powder structure, a steel pipe, and a method of manufacturing the steel pipe The method of manufacturing the boron alloy powder mixture includes: preparing a mixed powder including a boron iron alloy powder and a target powder; heat-treating the mixed powder to boronize at least a portion of the target powder and de-boronize at least a portion of the boron iron alloy powder, thereby de-boronizing the boron iron alloy powder to reduce the melting point of the boron iron alloy powder.

The invention discloses a low-cost high-strength steel plate for engineering machinery, and a production method thereof. The steel plate comprises, by mass, 0.16-0.18% of C, 0.3-0.4% of Si, 1.0-1.4% of Mn, 0.016% or less of P, 0.009% or less of S, 0.4-0.7% of Ni, 0.3-0.5% of Cr, 0.01-0.03% of Nb, 0.02-0.06% of Al, 0.30-0.40% of Mo, 0.010-0.030% of Ti, 0.0016-0.0030% of B, and the balance of Fe and inevitable impurities. The components of the steel plate produced through the method are reasonably designed, and a proper amount of boron element is added to reduce the use amount of alloy elements, so the production cost is low; a two-stage controlled rolling technology is adopted to solve coarse and uneven crystal grains due to common hot rolling, so the produced steel plate has excellent comprehensive mechanical performances and uniform rolled structure, and provides a uniform original structure for subsequent heat treatment; an offline quenching heat treatment technology is adopted to make the steel plate have a martensite structure, so the strength grade of the steel plate is improved, and the plate shape of the steel plate is good; and a tempering heat treatment technology is adopted to eliminate the internal stress of the steel plate, so the low temperature toughness of the steel plate is improved, and the structure of the steel plate is uniform.

The invention discloses a boron-phosphorus alloy cast iron used for the cylinder body of an air compressor and a manufacturing process thereof. : Fe 94; C 3-4; Si 2-3; Mn 0.5-1.0; P 0.1-0.5; S 0.05-0.1; B 0.03-0.05. The manufacturing process of the present invention is: raw and auxiliary materials-pig iron, scrap steel-electric furnace smelting-tapping inoculation, inoculation with flow-filtering casting-finished cylinder body. The invention is suitable for making cylinder blocks of air compressors.

The invention provides a foaming-ceramic heat insulating board. The foaming-ceramic heat insulating board is characterized by being prepared from, by weight, 25-30 parts of fusible clay, 6-12 parts of diatomaceous earth, 6-12 parts of alkalifeldspar, 5-10 parts of dolomite, 2-5 parts of starch, 6-12 parts of nano-scale silica fume, 6-12 parts of cement, 6-12 parts of lime, 1-2 parts of anionic surfactant, 0.5-3 parts of foaming agent, 1-4 parts of reinforcing elements, 0.1-0.5 part of triton X-100 and 100-190 parts of water; the reinforcing elements are titanium-system reinforcements or aluminum-system reinforcements or boron-system reinforcements or silicon-system reinforcements. The foaming-ceramic heat insulating board is low in heat conductivity coefficient, high in breaking strength, low in density and not prone to water permeation, and can be widely used for wall materials, heat insulating materials and underground engineering materials. As the triton X-100, the anionic surfactant and the starch are combined to be used, the porosity rate of the board is increased, and bubbles can be more evenly distributed.

The invention relates to a rubber composition used for treads of middle-large-size automobile tires. According to the material formula, the rubber composition contains the following components in parts by weight: matrix rubber including 65-75 parts of styrene-butadiene rubber and 25-35 parts of natural rubber; functional filler including 30-60 parts of modified fumed silica and 30-60 parts of carbon black; tackifying resin including 10-20 parts of specific boron hybridized methyl vinyl MQ silicon resin and 5-10 parts of synthesized terpene resin; 5-10 parts of a vulcanizing agent and 2-5 partsof a vulcanization accelerator. After being cured, the composition disclosed by the invention has high elasticity, self flame retardance, good wear resistant property and excellent ground gripping property and ground gripping durability, and has wide application prospect in the field of middle-large-size automobile tires.

The invention relates to a high-temperature-resistant high-performance rare earth permanent magnet material. The high-temperature-resistant high-performance rare earth permanent magnet material is prepared from, by weight, 20-35% of rare earth elements, 0.8-1.5% of boron, 0.02-0.2% of molybdenum, 0.5-5% of silicon, 0.1-3% of vanadium, 0.02-0.5% of calcium, 0.02-0.5% of zirconium, 0.02-0.5% of chromium, 0.5-5% of nickel and the balance iron and inevitable impurities. The rare earth permanent magnet material has high high-temperature resistance and excellent mechanical performance and is low in cost and high in stability, a preparation method is simple, and large-scale industrial production can be easily achieved.

The invention discloses a preparation method of a phenolic resin impregnation glass fiber composite material. The preparation method comprises following steps: heat treatment, acid etching, and coupling agent treatment are adopted for surface treatment of glass fiber; the treated glass fiber is immersed in a boron modified phenolic resin alcoholic solution obtained via modification with zirconium boride of a certain concentration, vacuum impregnation is carried out, an obtained product is delivered into a muffle furnace for curing molding, an obtained primary product is delivered into a phenolic resin alcoholic solution of a certain mass concentration for repeat impregnation curing so as to obtain a finished product. Optimization of the preparation method is carried out a series of property characterization, and the phenolic resin impregnation glass fiber composite material with desirable density is obtained finally. The advantages of the phenolic resin impregnation glass fiber composite material are that: the density is as low as 0.25 to 0.4g/cm3, excellent oxidation resistance is achieved, the preparation method is simple; and the phenolic resin impregnation glass fiber composite material can be used in the field of high temperature thermal protection.

The invention discloses aluminum-lanthanum-boron-strontium intermediate alloy for cast aluminum-silicon alloy and a preparation method of the aluminum-lanthanum-boron-strontium intermediate alloy. According to the preparation method, with Al-3B intermediate alloy, Al-10La intermediate alloy and Al-10Sr intermediate alloy as raw materials, the Al-10La intermediate alloy is added firstly to react with the Al-3B intermediate alloy at high temperature to produce a lanthanum-boron compound, and then the Al-10Sr intermediate alloy is added at lower temperature to enable strontium not to react with boron or the lanthanum-boron compound basically, thus the prepared aluminum-lanthanum-boron-strontium intermediate alloy is ensured to mainly contain the lanthanum-boron compound and an aluminum-strontium binary phase. The intermediate alloy can be applied to structure improvement of binary aluminum-silicon alloy and is more suitable for optimizing the structure of cast aluminum alloy with complex components. With adoption of the intermediate alloy, primary aluminum dendrites in a solidification structure is changed from developed dendrites to fine equiaxed grains without generating the harmful phenomena of fading of refinement, metamorphic degradation and the like, so that metamorphose can be effectively carried out on eutectic silicon to enable the eutectic silicon to be changed from a lamellar shape to a short rod shape and even a granular shape, thus the comprehensive mechanical property of the cast aluminum-silicon alloy and the castability of the cast aluminum-silicon alloy are improved.

The invention discloses a planting method for beet rich in various trace elements. The method comprises the steps of deep tillage and land preparation, film coverage and pipe pavement, seedling transplanting, water and fertilizer management and timely harvesting, wherein a base fertilizer rich in various trace elements and other effective components and a powder fertilizer are applied, and a reasonable application method is combined, so that the absorption of water and nutrients by beet roots is promoted, the fertilizer utilization rate is effectively improved, the content of boron, manganese,copper, iron, zinc, selenium, iodine and silicon in plant cells is increased, and the nutrition quality is improved.

The invention belongs to the technical field of agriculture plantation, and especially relates to a high-efficiency environment-friendly composite fertilizer specially used for lotus drought plantation. The high-efficiency environment-friendly composite fertilizer specially used for lotus drought plantation is prepared via combination and synergistic effect of livestock and poultry excrement, composite urea, calcium magnesium phosphate fertilizer, biological humic acid, fulvic acid, Chinese herbal medicine slag, tea slag, amino acid, boron mud, EDTA chelated iron, EDTA chelated manganese, a fertilizer effect synergist, and a natural insecticide. The high-efficiency environment-friendly composite fertilizer is capable of providing needed nitrogen, phosphorus, potassium, calcium, iron, and manganese continuously based on growth process of lotus in drought plantation; the composite urea is capable of releasing nitrogen slowly and continuously based on growth characteristics and fertilizer requirement laws of lotus drought plantation; active carbon is capable of purifying water in lotus drought plantation, absorbing heavy metal ions, and improving soil in lotus drought plantation; environment pollution is not caused; the high-efficiency environment-friendly composite fertilizer is friendly to the environment; fertilizer efficiency is high, and lasts long; adding of Chinese herbal medicine slag and tea slag is capable of increasing fiber content; combination of boron mud and livestock and poultry excrement is capable of realizing organic matter decomposition and release of trace elements in soil under the action of composite zymophyte; and soil growth environment is improved.

The invention provides a semiconductor device and a semiconductor device fabrication method. The semiconductor device includes as a resistance element a first polycrystalline silicon and a second polycrystalline silicon containing impurities, such as boron, of the same kind and having different widths. The first polycrystalline silicon contains the impurities at a concentration CX. The second polycrystalline silicon has a width larger than a width of the first polycrystalline silicon and contains the impurities of the same kind at a concentration CY lower than the concentration CX. A sign of a temperature coefficient of resistance (TCR) of the first polycrystalline silicon changes at the concentration CX. A sign of a TCR of the second polycrystalline silicon changes at the concentration CY. A change in the resistance value of the resistance element caused by the operation of the semiconductor device and deterioration in the performance of the semiconductor device caused by the change in the resistance value of the resistance element are suppressed.

The invention discloses a treatment system and method for mixed waste liquid of drilling wastewater and fracturing flowback fluid. The system comprise a wastewater storage unit, a flocculant filling unit, a coagulant aid filling unit, a static mixing unit, a micro-chemical flocculation unit, a gravity settling unit, an ion masking agent filling unit and an ion exchange unit. A flocculant is addedto the mixed waste liquid of the drilling wastewater and the fracturing flowback fluid sequentially and evenly mixed with the mixed waste liquid, a coagulant aid is added to the mixed waste liquid ofthe drilling wastewater and the fracturing flowback fluid for reaction, floating matter and precipitates are finally removed by standing, corresponding treatment agents are selected according to the characteristics of different metal ions in the wastewater to remove calcium, magnesium and boron ions in the wastewater, and treatment can be completed with the process. After treatment with the process, the concentration of suspended matter in water is lower than or equal to 10 mg/L, the concentration of calcium ions is lower than or equal to 300 mg/L, the concentration of magnesium ions is lowerthan or equal to 150 mg/L, and the concentration of boron ions is lower than or equal to 10 mg/L. The treated mixed waste liquid of the drilling wastewater and the fracturing flowback fluid can be used for guanidine gum fracturing water in tight gas wells, and reuse of water resources is realized.

The invention discloses a method for producing 23MnB steel based on a converter flow path and belongs to the field of metallurgy. The invention aims at solving the technical problem of providing a method for producing 23MnB steel based on a converter flow path by which a small-size continuous casting machine can conduct smooth casting. The method comprises the following steps of: a, smelting in aconverter; b, when steel tapping, adding calcium carbide so that the oxygen activity of molten steel is less than 0.025%; c, refining in an LF (ladle furnace) and heating after 3.5-4.5kg of calcium carbide is added in each ton of steel, adding 0.15-0.45kg of metal aluminum in each ton of steel in the heating process, when molten steel is heated to 1570-1585 DEG C, stopping heating, and then adding titanium until the content of titanium is 0.02-0.06%, and adding boron until the content of boron is 0.0005-0.003%; and d, continuously casting. The method of the invention is applicable to a large-size continuous casting machine and can perform smooth casting on the small-size continuous casting machine.

The invention discloses a setting agent used after wool stretch and refinement. The setting agent is characterized by comprising, by weight parts, 3-12 parts of trimethylolmelamine, 0.09-0.8 part of boron fluoride, 1.2-2 parts of vinyl chloride-vinyl acetate resin, 4-8 parts of butanone, 6-12 parts of dicumyl peroxide, 4-6 parts of polystyrene foam plastics and 100-120 parts of water. According tothe setting agent, wool which is stretched and refined can be quickly oxidized, and the goal of quick forming is achieved.

The invention relates to a method of stabilizing the bonding agent gelation time in the consolidation of a geological formation in the presence of one or more catalytically active substances, in which method a bonding agent is infiltrated into the formation, a portion of the infiltrated bonding agent is optionally expelled by flushing with a gas or a liquid, and the bonding agent remaining in the formation is cured. the bonding agent comprises a mixture of a) a heterocondensate, obtainable by hydrolysis and condensation of at least one hydrolyzable silicon compound and at least one metal, phosphorus or boron compound, the metal being selected from Al, Ge, Sn, Pb, Ti, Mg, Li, V, Nb, Ta, Zr and Hf, B) at least one organic polymerizable monomer or oligomer comprising a C-C double bond, and C) at least one thermal polymerization initiator without peroxide function.

The invention discloses a tetra-coordinated octahydroxyquinoline boron compound, preparation method and application of the compound, belonging to the technical field of stimulus-response luminescent materials. Three single crystals of the compound can be obtained through different preparation methods, show double-fluorescence emission and have typical homogeneous polymorph property. After a solidsample of the compound is mechanically ground or subjected to external force, fluorescence light can be changed, and after the ground solid sample is subjected to heat treatment, the fluorescence light can be restored, so that high-efficiency restorable mechanophore property. The solution of the compound is heated to a certain temperature, is written/printed to paper, and can shown different fluorescence lights at room temperature, so that the creative application of color printing of single ink can be initially achieved. In conclusion, the compound has wide application prospects in the fieldsof color printing, anti-counterfeit materials, pressure sensors, optoelectronic devices and the like.

The invention discloses a low-dimensional rare earth boride nano material and a solid phase preparation method thereof. The preparation method comprises the following steps: S1, catalyst film synthesis: a catalyst is deposited on a substrate; and S2, solid phase source thermal evaporation deposition: under protection of a carrier gas, a boron source, an anhydrous rare earth halide and the substrate are placed at a growth temperature of 700-1200 DEG C and a growth gas pressure of 0.1-100 kPa for evaporation and growth for 0.5-4 h, and the low-dimensional rare earth boride nano material is obtained on the substrate. Controllable preparation of large area, high density, and single crystal rare earth boride nanostructures can be achieved on various substrates by using different catalysts.