275 results about "Borium" patented technology

A steel sheet has a chemical composition including in wt % C: 0.2-0.4%, Mn: 0.8-2.0%, Si: 0.1-0.5%, Al: 0.01-0.1%, Ti: 0.01-0.1%, B: 0.0005-0.005%, P≤0.040%, Ca≤0.01%, S≤0.006%, N≤0.01%. The steel sheet includes from the bulk to the surface of the coated steel sheet a bulk and a skin layer occupying the outermost 10% of the thickness on either side of the bulk. The bulk includes an inclusion population in which the sum of clustering indexes of MnS and TiN / Ti(C,N) inclusions is less than or equal to 300 μm / mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending anisotropy equal to or lower than 7°.

The utility model relates to a filter assembly, a tail gas treatment device and boron diffusion production equipment, the filter assembly comprises a filter element and a filter cartridge, the filter element is provided with a first end and a second end along a first direction, and the filter element is provided with a plurality of filter through holes along the first direction; the filter element is positioned in the filter cartridge; the filter cartridge is provided with an air inlet and an air outlet; the air inlet is communicated with an exhaust pipe of a vacuum furnace of the boron diffusion production equipment, and the air outlet is communicated with a tail exhaust pipe of the boron diffusion production equipment; tail gas exhausted by the exhaust pipe can enter the filtering through hole through the gas inlet and the first end in sequence, and can be exhausted to the tail exhaust pipe through the second end and the gas outlet in sequence after being filtered; a plurality of water injection blind holes extending in the first direction are formed in the filter element, and openings of the water injection blind holes are formed in the second end; a first water injection port is formed in the filter cartridge and is communicated with the opening through a water pipe; and the filter element is made of a porous material. According to the technical scheme, harmful substances such as B2O3 in the tail gas can be fully and effectively removed, and the filtering efficiency is high.

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The invention discloses a composite heavy metal adsorbent synthesized through mineral conversion and a preparation method of the composite heavy metal adsorbent, and belongs to the technical field of deep processing of natural nonmetallic minerals and preparation of heavy metal adsorption functional materials, and the main preparation method comprises the following steps: S1, crushing and crushing natural clay minerals, and sieving with a 80-mesh sieve to obtain mineral powder; s2, mixing the obtained mineral powder with a calcium compound, and carrying out ball milling; s3, adding a boron compound, and continuing ball milling; s4, adding water into a solid material obtained by ball milling according to a solid-to-liquid ratio of (1: 5)-(1: 20), putting into a microwave hydrothermal reaction kettle, adding an organic auxiliary agent, carrying out gradient heating to 100-200 DEG C, reacting for 30-120 minutes, then naturally cooling to room temperature, separating, drying and crushing; according to the invention, natural clay raw ore is taken as a raw material, and the borate-silicate composite adsorption material is prepared in a preparation mode of combining solid-phase reaction and microwave hydrothermal treatment, so that high-concentration and low-concentration heavy metal ions are efficiently removed.

The invention discloses high magnetic induction oriented silicon steel and a production method. The high magnetic induction oriented silicon steel comprises the following components in percentage by weight: 0.032 to 0.065 percent of C, 2.58 to 4.02 percent of Si, 0.014 to 0.036 percent of Als, 0.021 to 0.043 percent of Mn, 0.0015 to 0.014 percent of Nb, 0.0015 to 0.0084 percent of B, 0.0037 to 0.0081 percent of N and 0.004 to 0.015 percent of S. A large amount of B element is added, a proper amount of BN and other congenital inhibitors can be provided, the situation that primary grains are too large is effectively avoided, meanwhile, boron oxide, boric acid and borate are added into the magnesium oxide additive, an acquired inhibitor can be generated with N, an AlN + BN double-inhibitor system is formed, and the stability of magnetic performance is guaranteed; and the temperature is kept at 910-1005 DEG C for 18-25 hours, so that B is fully diffused and forms a new BN inhibitor with N, and the stability of the magnetic performance is effectively improved.

The invention discloses an efficient refining method for red impure copper. The efficient refining method comprises the following steps: (1) preparing calcium-cerium composite oxide powder; (2) preparing boron-phosphorus doped powder; (3) preparing a refining auxiliary agent; (4) red impure copper is put into a crucible, a medium-frequency induction furnace is adopted for heating and melting the red impure copper into a melt, the melt is covered with charcoal after being completely melted, the temperature of the melt is kept at 1110-1120 DEG C, then the refining auxiliary is added, and the mass ratio of the refining auxiliary to the melt is (3-4) kg: 1 t; and after charging, stirring the melt at a constant temperature of 1110-1120 DEG C for 10 minutes, then standing for 15 minutes, deslagging, casting and molding to obtain the refined impure red copper. After refining through the method, the tensile strength and the electric conductivity of the impure red copper can be remarkably improved, and the use performance of the impure red copper is improved.

The present invention belongs to the technical field of ceramic preparation, and relates to a preparation method and device for a high-purity porous boron carbide nuclear control rod. The present invention uses boron trichloride gas as the boron source, methane as the carbon source, argon as the carrier gas and protective gas, and hydrogen as the catalytic gas and reducing gas to prepare a high-purity porous boron carbide nuclear control rod. The method of increasing the deposition temperature of boron carbide step by step and region by region from the back to the front is adopted, which can not only improve the deposition rate of boron carbide, but also ensure that the physical and mechanical properties of each part of the prepared high-purity porous boron carbide nuclear control rod are consistent. By changing the particle size of the boron carbide powder for preparing the boron carbide blank and coordinating the adjustment of temperature, flow rate, pressure and deposition time, the porosity and pore size of the prepared high-purity porous boron carbide can be regulated and a high total boron and carbon content can be obtained, so as to meet various actual requirements.

The invention discloses special hot work die steel for large-scale integrated die casting and a preparation method of the special hot work die steel, and belongs to the technical field of hot work die steel. The steel comprises the following chemical components in percentage by mass: 0.28%-0.35% of C, 0.01%-0.025% of La, 0.01%-0.02% of Ce, 0.4%-0.45% of Mn, 0.1%-0.2% of Si, 4.5%-5.5% of Cr, 1.50%-2.00% of W, 2.2%-2.8% of Mo, 0.8%-1.2% of V, 1.0%-1.5% of Co, 0.1%-0.3% of Nb and the balance of Fe and impurities (S and P are less than or equal to 0.015%). The preparation method comprises the composite processes of vacuum induction melting and electroslag remelting purification, hydrogen firing high-temperature homogenization and three-upsetting and three-drawing multi-directional forging, spheroidizing annealing and subzero treatment, step quenching and double tempering, multi-element co-permeation, supersonic particle bombardment surface nanocrystallization and plasma boriding. The rare earth element La / Ce refined grain boundary is combined with multi-element alloy strengthening and surface nanocrystallization-boronizing synergistic treatment, so that the hardness, impact toughness and thermal fatigue life of the die steel are remarkably improved, and the die steel is suitable for high-temperature, high-pressure and high-wear working conditions of a large integrated die-casting die.

The invention discloses a heat treatment process for improving the obdurability of die steel, and belongs to the technical field of metal heat treatment. The invention relates to a heat treatment process for improving the toughness of die steel, which adopts a die steel material with a specific component proportion, and the die steel material comprises carbon, chromium, molybdenum, vanadium, tungsten, nickel, niobium, niobium carbide and trace boron element. By sequentially implementing austenitizing, quenching, deformation heat treatment, multi-stage subzero treatment, pulsed magnetic field assisted tempering, gradient surface hardening and nano-precipitation regulation treatment, the hardness and toughness of the die steel are remarkably improved. Particularly, through the synergistic effect of multiple advanced heat treatment means, the martensite structure is effectively refined, carbide precipitation is strengthened, the surface hardness and the core toughness are improved, the comprehensive performance of toughness and toughness is achieved, and the method is suitable for the field of high-performance injection molds and hot-working molds.

The invention discloses a preparation method of high-silicon high-hematite limonite pellets, and belongs to the field of blast furnace burden, and the preparation method specifically comprises the following steps: step A, carrying out primary batching, drying and wet grinding on concentrate powder, Kara concentrate powder, Brazil concentrate powder, laterite-nickel ore, red mud iron powder and boron-magnesium concentrate powder in proportion; step B, proportionally adding bentonite into the wet-ground material in the step A, and carrying out secondary batching; step C, conveying the materials in the step B into a vertical mixer for strong mixing; step D, conveying the mixed material to a pelletizing chamber for pelletizing; and E, the green pellets are conveyed to a roasting cooling system to be prepared into finished pellets. According to the pellet prepared through the method, the adding amount of bentonite is reduced, the cost is reduced, the compressive strength of the finished pellet can reach 2500N / P or above, the green pellet drop strength, the compressive strength and the dry pellet compressive strength are far higher than those of on-site pellets, and the production requirement can be met.

The invention relates to a control method for increasing the boron content in a forge piece through double-vacuum smelting of 2.25 Cr1Mo0.25 V steel, belongs to the technical field of smelting, and solves at least one of the problems that in an existing 2.25 Cr1Mo0.25 V steel smelting process, the boron content cannot reach the effective effect content, the boron content fluctuation between heat times is large, and an existing boron control process is incompatible with a 2.25 Cr1Mo0.25 V steel double-vacuum process. A control method for improving the boron content in a forge piece through double vacuum smelting of 2.25 Cr1Mo0.25 V steel comprises the steps that vacuum carbon deoxidation refining is conducted, specifically, slagging, diffusion deoxidation, alloying, vacuum treatment, component fine adjustment and soft blowing are conducted on molten steel, and key element adding is conducted; and the vacuum casting comprises preparation before casting and vacuum casting protection. According to the method, the effective boron content is increased, the boron content fluctuation among the heats is reduced, and the process compatibility is good.

The invention belongs to the technical field of metallurgical manufacturing, and particularly relates to boron microalloyed high-strength free-cutting steel and a production method thereof. The steel comprises the following chemical components in percentage by weight: 0.35%-0.45% of C, 0.10%-0.25% of Si, 1.0%-1.50% of Mn, 0.050%-0.060% of P, 0.20%-0.35% of S, 0.0005%-0.0030% of B, 0.05%-0.20% of Bi, 0.02%-0.06% of Ti, less than or equal to 0.20% of Cr, less than or equal to 0.20% of Cu, less than or equal to 0.005% of N and the balance of Fe and inevitable impurities, wherein Ti / N is greater than or equal to 3.5. The whole-flow process control of converter-LF refining-continuous casting-controlled rolling and controlled cooling is adopted. The free-cutting round steel with the tensile strength reaching 800-1000 MPa is successfully produced, the cutting force is reduced by 20%-30%, and the service life of a cutter is prolonged by 40% or above.

The application relates to the technical field of bearing steel, in particular to a boronized bearing steel and a preparation method thereof. The boronized bearing steel comprises a base body and a boronized layer; the base body is 20CrNiMo steel and comprises the following components in percentage by weight: C 0.18-0.22wt%, Si 0.25-0.32wt%, Mn 0.75-0.83wt%, Cr 0.48-0.55wt%, Ni 0.50-0.70wt%, Mo 0.40-0.50wt%, V 0.18-0.21wt%, and the balance is Fe and inevitable impurities; the boronized layer is obtained through salt bath boronizing, the boronizing agent for the salt bath boronizing is mainly composed of Na2B4O7, Al and KCl, and the thickness of the boronized layer is 20-80 mu m. The application forms a boronized layer with a certain thickness on the surface of the base body through specific base body components and boronizing agents, and the surface hardness, wear resistance, strength and toughness of the bearing steel are significantly improved.

The invention relates to the technical field of hard alloys, and particularly discloses a ruthenium boride reinforced ultra-ultra coarse grain WC-Co hard alloy and a preparation method thereof in order to solve the problems of low strength and hardness and poor toughness of an ultra-ultra coarse grain alloy product caused by difficult control of grain size in an existing ultra-ultra coarse grain alloy preparation process. The ultra-coarse grain WC-Co hard alloy comprises the following raw materials: 0.5-5% of ruthenium-boron mixed powder, 5-10% of cobalt powder and the balance of tungsten carbide particles. Wherein the number ratio of ruthenium atoms to boron atoms in the ruthenium-boron mixed powder is 1: (0.5-1.5), and the carbon adjusting range of the total mass of tungsten and carbon in the tungsten carbide particles is 6.08-6.20 wt%. The problems that WC particles are excessively crushed and Co phases are non-uniformly distributed are solved by utilizing high-energy stirring dry mixing without adding a grinding body and combining a flexible wet grinding process with extremely short time and extremely low ball-to-material ratio, and Ru powder and B powder are introduced and combined with a special sintering process, so that the effects of high toughness, high hardness, high heat conductivity and the like of the ultra-coarse grain alloy are achieved.

The invention provides a preparation method of a boron-containing stainless steel component. According to the method, the boron-containing stainless steel powder core wire is prepared by wrapping boron and compound particles thereof with a certain content and proportion through a stainless steel sheath. And then the prepared boron-containing stainless steel powder core wire serves as a raw material, and a boron-containing stainless steel component is prepared through deposition by means of the electric arc additive manufacturing technology. The method combines the characteristics of flexible and easy-to-customize components of the cored wire and the characteristics of in-situ metallurgical melting of the metal wire and rapid solidification and layer-by-layer accumulation forming of an electric arc additive technology, and effectively solves the problems of poor thermoplasticity and difficulty in processing and forming of a boron-containing stainless steel material in the prior art. While the boron-containing stainless steel material is prepared, the structure-function integrated forming of the boron-containing stainless steel large nuclear shielding component can be realized.

Non-grain-oriented electrical steel sheet, having a thickness of 0.30 mm to 0.38 mm and a composition comprising the following elements, expressed as weight percent: 0.0001% ≤ Carbon ≤ 0.007% 0.09% ≤ Manganese ≤ 0.15% 2.6% ≤ Silicon ≤ 2.95% 0.1% ≤ Aluminum ≤ 0.5% Phosphorus ≤ 0.15% Sulfur ≤ 0.006% Nitrogen ≤ 0.09% 0% ≤ Tin ≤ 0.04% and may contain one or more of the following optional elements: 0% ≤ Niobium ≤ 0.1% 0% ≤ Titanium ≤ 0.1% 0% ≤ Vanadium ≤ 0.1% 0% ≤ Chromium ≤ 1% 0% ≤ Molybdenum ≤ 0.5% 0% ≤ Tungsten ≤ 0.1% 0% ≤ Cobalt ≤ 1% 0% ≤ Arsenic ≤ 0.05% 0.001% ≤ Calcium ≤ 0.01% 0% ≤ Copper ≤ 1% 0% ≤ Nickel ≤ 1% 0% ≤ Boron ≤ 0.05% 0% ≤ Lead ≤ 0.2% 0% ≤ Antimony ≤ 0.2% wherein the remaining composition consists of iron and unavoidable impurities caused by processing, wherein the microstructure of the steel sheet consists of ferrite, comprising 80% to 100% recrystallized microstructure and 0% to 20% non-recrystallized microstructure in area fractions, wherein the average grain size of the recrystallized microstructure is 20 to 110 micrometers, and exhibiting a percentage of eddy current losses in the total iron losses, measured at 1 T and 400 Hz according to standards IEC 60404-2, of 35% to 45%, calculated according to the Bertotti method.

The present invention relates to a hot stamping part comprising a base steel plate and a zinc-based plating layer on the base steel plate, wherein the base steel plate comprises carbon (C) 0.25 wt% or more and 0.50 wt% or less, silicon (Si) 0.10 wt% or more and 0.80 wt% or less, manganese (Mn) 0.30 wt% or more and 3.0 wt% or less, phosphorus (P) 0 or more and 0.05 wt% or less, sulfur (S) 0 or more and 0.01 wt% or less, boron (B) 0.0005 wt% or more and 0.005 wt% or less, chromium (Cr) 0.01 wt% or more and 1.0 wt% or less, molybdenum (Mo) 0.01 wt% or more and 1.0 wt% or less, nickel (Ni) 0.001 wt% or more and 1.0 wt% or less, and at least one of titanium (Ti), niobium (Nb), and vanadium (V). A hot stamping part is provided that comprises a total of 0.01 weight% or more and 0.1 weight% or less, with the remainder being iron (Fe) and other unavoidable impurities, wherein the plating layer comprises a zinc-rich phase (Zn-rich) and an iron-zinc alloy phase, and the zinc-rich phase has a fraction of 20% to 40% of the entire plating layer.

A cold-rolled steel sheet having a composition comprising 0.05% < = carbon < = 0.15%, 1.8% < = manganese < = 2.7%, 0.1% < = silicon < = 1%, 0.01% < = aluminum < = 0.8%, 0.1% < = chromium < = 0.9%, 0% < = phosphorus < = 0.09%, 0.0001% < = titanium < = 0.1%, 0.0005% < = boron < = 0.003%, 0.01% < = niobium < = 0.1%, 0% < = sulfur < = 0.09%, 0% < = nitrogen < = 0.09%, 0% < = vanadium < = 0.2%, 0% < = molybdenum < = 0.2%, 0% < = nickel < = 2%, 0% < = copper < = 2%, 0% < = calcium < = 0.005%, 0% < = cerium < = 0.1%, 0% < = magnesium < = 0.05%, the microstructure of the steel sheet contains, in area fraction, 40% to 60% of martensite, 15% to 40% of critical zone ferrite, 10% to 35% of cumulant transformed ferrite and bainite, and 0% to 5% of retained austenite.

This invention relates to the field of ferrous metallurgy technology and discloses a method for the reduction production of high-purity, low-oxygen-content sponge iron. The method includes: feeding pellets and reducing materials into a rotary kiln for preheating and forming a metallic iron shell on the surface; pulse-injecting a composite reducing liquid into a high-temperature solid-phase bed in a deep reduction zone; using a rotary encoder for feedback to perform dynamic phase-controlled injection, achieving gas-liquid linkage control and nitrogen cooling maintenance; and collecting the finished product through end-stage homogenization, cooling, and magnetic separation. Ammonia gas generated by the pyrolysis of the composite reducing liquid penetrates the metal layer for deep reduction, and a chemical shielding layer is constructed using boron-carbon bonds formed on the microporous surface of the iron matrix. This invention effectively improves the metallization rate of sponge iron, significantly inhibits secondary oxidation of the finished product during kiln exit and storage, and solves the technical problem of high and unstable residual oxygen content in sponge iron.

Double-rolled non-grain-oriented electrical steel sheet, having a thickness of 0.28 mm to 0.32 mm and having a composition comprising the following elements, expressed as weight percent: 0.0001% ≤ Carbon ≤ 0.007% 0.2% ≤ Manganese ≤ 0.24% 3.1% ≤ Silicon ≤ 3.5% 0.8% ≤ Aluminum ≤ 1.1% Phosphorus ≤ 0.15% Sulfur ≤ 0.006% Nitrogen ≤ 0.09% 0.01% ≤ Chromium ≤ 1% 0.01% ≤ copper ≤ 1% and may contain one or more of the following optional elements 0% ≤ Niobium ≤ 0.1% 0% ≤ Titanium ≤ 0.1% 0% ≤ Vanadium ≤ 0.1% 0% ≤ Molybdenum ≤ 0.5% 0% ≤ Tungsten ≤ 0.1% 0% ≤ Cobalt ≤ 1% 0% ≤ Arsenic ≤ 0.05% 0.001% ≤ Calcium ≤ 0.01% 0.001% ≤ Nickel ≤ 0.04% 0% ≤ Boron ≤ 0.05% 0% ≤ Lead ≤ 0.2% 0% ≤ Tin ≤ 0.2% 0% ≤ Antimony ≤ 0.2% wherein the remaining composition consists of iron and unavoidable impurities caused by processing, wherein the microstructure of the steel sheet consists of ferrite, comprising 80% to 100% recrystallized microstructure and 0% to 20% non-recrystallized microstructure in area fractions, wherein the average grain size of the recrystallized microstructure is 20 to 110 micrometers, and exhibiting a percentage of eddy current losses to the total iron losses, measured at 1 T and 400 Hz according to standards IEC 60404-2, of 30% to 35%, calculated according to the Bertotti method, and simultaneously a magnetic polarization at 5000 A / m (J50) of 1.645 T to 1.660 T.

A hardened slip and a method of making the hardened slip are disclosed. A method of hard surfacing a slip component for a downhole tool is disclosed. The slip component may have a bearing surface and may be composed of a base material, the base material being metallic. The method may comprise steps of positioning at least the bearing surface of the slip component with a direct contact with a boron source; bonding an external layer at least on the bearing surface to form a metallurgical bond between boron from the boron source with the base material by boriding the base material; and maintaining a bulk temperature of the slip component below a melting point of the base material.

The invention discloses a directional solidification high-boron high-speed steel jet nozzle for oil field hydraulic power and a preparation method thereof, and belongs to the technical field of oil field exploitation equipment. The preparation method comprises the steps that raw materials such as electrical pure iron and micro-carbon ferrochrome are proportioned according to the specific mass fraction, and high-boron high-speed steel molten steel is obtained through vacuum melting; after the molten steel is subjected to rare earth aluminum desulfurization and temperature control, an as-cast blank is obtained through directional solidification treatment; and the cast blank is subjected to machining, austenitizing quenching, tempering heat treatment and fine polishing treatment, and a finished product is obtained. The finished product comprises a metal matrix and a directionally-arranged (Fe, Cr) 2B boride hard phase, alloy components are accurate and controllable, the hardness is 58.5-64.5 HRC, and the surface roughness is 0.25-0.40 mu m. The high-wear-resistance and high-brittleness high-wear-resistance and high-performance alloy nozzle has low cost and high performance, the problems that a traditional nozzle is poor in wear resistance, high in cost and large in brittleness are solved, the service life is remarkably prolonged, and the high-wear-resistance and high-brittleness high-wear-resistance and high-brittleness high-wear-resistance high-brittleness high-wear-resistance high-brittleness high-wear-resistance high-brittleness high-

The invention discloses a neutral ramming material for an intermediate frequency furnace, and belongs to the technical field of steel smelting. Comprising the following raw materials in parts by weight: 35-40 parts of microporous sintered corundum particles with the particle size of 3-5mm, 35-40 parts of microporous sintered corundum particles with the particle size of 1-3mm, 20-25 parts of magnesium aluminate spinel particles with the particle size of 1-3mm, 9-11 parts of activated aluminum oxide micro powder, 5-7 parts of modified cordierite fine powder, 1-2 parts of pretreated boron nitride, 0.5-1.5 parts of nano aluminum oxide and 0.2 part of nano aluminum oxide. 0.4 part by weight of zinc borosilicate glass powder, 0.6-0.8 part by weight of high-temperature organic silicon resin and 0.05-0.1 part by weight of anti-burst fiber. The prepared neutral ramming material for the intermediate frequency furnace has good compression strength, thermal shock resistance and slag resistance.

The utility model relates to a drying device for boron diffusion heating furnace body production, which comprises a base, a vertical plate is arranged on the base, a drying box is fixedly mounted at the top end of the vertical plate, an adjusting mechanism is arranged in the drying box, a clamping mechanism is arranged on the adjusting mechanism, and a heating furnace body is clamped on the clamping mechanism. The adjusting mechanism comprises an adjusting assembly, the adjusting assembly comprises a first motor, and the first motor is fixedly installed at the bottom end of the drying box. Through the arrangement of the adjusting mechanism, the distance between the clamping mechanisms on the two sides is conveniently adjusted according to the size of the boron diffusion heating furnace body, so that the boron diffusion heating furnace body is effectively clamped by the clamping mechanisms, the purpose of clamping the boron diffusion heating furnace bodies with different inner diameters is achieved through the arrangement of the clamping mechanisms, drying of the boron diffusion heating furnace bodies is facilitated, and the drying efficiency of the boron diffusion heating furnace bodies is improved. And meanwhile, the boron diffusion heating furnace body can be driven to rotate, and the drying efficiency of the boron diffusion heating furnace body is improved.

The invention discloses a processing technology of a high-strength nano modified glaze enameled steel plate, which comprises the following steps: mixing nano Al2O3 and nano ZrO2 according to a mass ratio of 3: 1, carrying out ultrasonic dispersion, and mixing and grinding with borosilicate base glaze; the high-strength low-carbon steel plate is pretreated, and phosphating treatment with specific parameters is included; the glaze is coated by electrostatic spraying, and three-stage firing is carried out after drying. According to the nano-composite system, the hardness and toughness are synergistically improved, and the problems of nano-particle aggregation, poor adaptability of high-strength steel plate enamel and the like are solved by combining a nano-dispersion process, an interface collaborative design and a precise sintering system.

The invention relates to the technical field of die steel processing, in particular to high-toughness die-casting die steel and a preparation method thereof.The high-toughness die-casting die steel is prepared from, by weight, 0.35%-0.40% of carbon, 0.20%-0.50% of silicon, 0.30%-0.45% of manganese, 5.10%-6.50% of chromium, 2.40%-3.00% of molybdenum, 0.60%-0.90% of vanadium, 0.03%-0.08% of niobium, 0.02%-0.06% of nickel, 0.001%-0.004% of boron, 0.02%-0.06% of rare earth elements, 0.001%-0.015% of phosphorus, 0.005%-0.008% of sulfur and the balance iron. According to the high-toughness die-casting die steel prepared through the formula, by optimizing alloy components and introducing trace alloying elements, center macrosegregation generated in the solidification process of a large-section module is restrained, and the uniformity of the material cross section performance is effectively improved. And especially in ultra-large die steel with the thickness larger than or equal to 300 mm, the transverse impact toughness is greatly improved. The steel type shows excellent thermal fatigue resistance and fracture toughness under the high-frequency thermal cycle service condition, generation and expansion of hot cracks are effectively delayed, and therefore the service life of an ultra-large die-casting die is prolonged, and the production shutdown cost is reduced.

The invention discloses a mine filling material containing vanadium tailings and a preparation method of the mine filling material. The concrete is prepared from the following raw materials in parts by weight: 30-60 parts of activated vanadium tailings, 10-20 parts of modified boric sludge, 20-40 parts of cement, 3-8 parts of a water reducing agent and 15-25 parts of water. According to the mine filling material containing the vanadium tailings, the vanadium tailings serve as a main material, tailings waste is effectively utilized, and waste is turned into wealth. In the components, the vanadium tailings are activated, the boron mud is modified and then combined for use, the compressive strength of the filling material is improved, the compressive strength of the filling material is also improved through combined use of the water reducing agent beta-naphthalene sulfonic acid formaldehyde condensate and the polyaspartic acid grafted sodium lignin sulfonate, and the components are combined for synergistic interaction.

The invention discloses an anti-oxidation special steel high-speed wire decarburization prevention material which is prepared from the following components in parts by weight: 30-50 parts of a component A, 30-50 parts of a component B, 10-30 parts of a component C, 10-30 parts of a component D and 5-10 parts of a pigment, the component A is internally provided with boron modified adamantane, epoxy bentonite, silicon phosphate, amino acid potassium and amino modified triazine, and the component D is internally provided with boron modified adamantane, epoxy bentonite, silicon phosphate, amino acid potassium and amino modified triazine. The component B is internally provided with nano graphene, polyvinyl alcohol, a transparent film and benzoic acid, and the component C is internally provided with SiO2, Al2O3, talcum powder and gypsum powder. After the product is brushed, a coating is compact, the texture is hard, no gap or void exists, the oxidation loss of steel and iron during heat treatment and the procedure of removing oxide skin are avoided through coating smearing, and the coating quality is improved. The specification and the size of the workpiece are more accurate; fatigue strength reduction caused by metal decarburization during heat treatment is avoided, surface gas absorption of metal during heat treatment is avoided, and metal embrittlement is prevented.

The invention relates to an amorphous lamination for improving magnetic flux and a preparation process thereof, and belongs to the technical field of motor manufacturing. According to the method, high-purity iron, boron, silicon, carbon, cobalt, copper, niobium and rare earth metal serve as raw materials, an amorphous alloy belt is obtained through single-roller rapid quenching belt manufacturing, and an amorphous structure with the grain size being 10-20 nm is formed through primary annealing and magnetic field auxiliary annealing and cooling to the room temperature; when the prepared amorphous lamination is used for a motor, magnetic flux can be improved, eddy current can be reduced, and therefore the torque density of the motor can be improved.

The invention discloses a high-strength steel member which is alloyed by a Fe matrix and comprises the following components in percentage by weight: 0.35%-0.45% of carbon (C), 12%-15% of manganese (Mn), 8%-10% of nickel (Ni), 1.8%-2.2% of molybdenum (Mo), 0.08%-0.12% of nitrogen (N), 0.03%-0.08% of rare earth elements, 0.02%-0.05% of boron (B) and the balance of iron (Fe) and inevitable impurities. Alloy elements with specific content are added into a Fe matrix, and the elements interact with the Fe matrix, so that the microstructure and the performance of the Fe matrix are changed; carbon and nitrogen can form carbides and nitrides to play a role in precipitation strengthening; manganese and nickel can improve the hardenability of the steel; molybdenum can improve the strength and toughness of the steel; and the rare earth elements can refine grains, so that the steel member has high strength, high toughness and good corrosion resistance.