87 results about "Fe content" patented technology

The invention relates to the technical field of metal casting, and discloses a smelting and casting method of a high-toughness regenerated aluminum alloy, which comprises the following steps: measuring the iron content of a regenerated aluminum melt, regulating and controlling the manganese-iron ratio, heating the melt to 750-790 DEG C, and carrying out overheating treatment to eliminate a hereditary core; cooling to 630-645 DEG C, applying a mechanical shear flow field with the average shear rate not lower than 60s <-1 > in the interval, stripping a diffusion boundary layer on the surface of the iron-rich phase crystal nucleus by utilizing fluid drag force, breaking dendritic crystals, and separating out in a polyhedral or spherical manner; according to the method, through active intervention of a critical shear flow field, the problem of needle-like growth of an iron-rich phase caused by solute diffusion blocking in a traditional technology is solved, in-situ generation of the harmless iron-rich phase in the high-iron-content secondary aluminum is achieved, the obdurability of a die casting is improved, and dependence on the purity of raw materials is reduced.

The invention discloses a high-Fe-content and high-comprehensive-performance aluminum alloy and a preparation method thereof.The specific method comprises the following steps that firstly, reasonable smelting and refining processes are adopted, three different modifiers are added to conduct Fe phase modification treatment on waste aluminum materials, and the existence form of the Fe element is controlled; and carrying out homogenization heat treatment and deformation heat treatment to obtain the high-temperature-resistant alloy. Through alloy component design and machining process optimization, the characteristics of morphology, distribution and the like of the Fe-rich phase are changed, phase change of the Fe-containing phase is achieved, the interface behavior of the Fe-containing phase is regulated and controlled, then accurate control over the microstructure of the high-Fe-content aluminum alloy is achieved, and high comprehensive performance is obtained. The high-Fe-content 6XXX series aluminum alloy prepared through the method has excellent mechanical performance and corrosion resistance, the application requirement of the high-quality 6XXX series aluminum alloy can be met, and a new way is provided for high-value utilization of secondary aluminum.

The application discloses a low-ash-consumption converter smelting method, adopts single-slag smelting, controls the converter scrap steel ratio in 8% to 26%, controls the top blowing oxygen supply flow in 3.0 to 4.0 Nm 3 / (min·t), controls the bottom blowing argon flow in 0.03 to 0.10 Nm 3 / (min·t); the smelting process is improved by the cooperation of the gun position and the charging; the solid waste slag is added in the converter blowing process, the content of CaO in the slag is controlled in 45% to 55%, and the content of MgO is controlled in 5.5% to 7.5%; meanwhile, the dust removal pressure ball is added to improve the activity of FeO in the slag, and the terminal carbon content of the converter is controlled to be less than or equal to 0.05%. By adding the solid waste slag in the smelting process, the slag needed to oxidize a large amount of iron elements to generate FeO is reduced, so that the total iron content of the slag is reduced; by adding the synthetic slag, the liquidity of the slag is ensured, and the carbon-oxygen reaction is promoted; the total iron content of the low-carbon steel converter terminal slag is stably controlled to be less than 14.5%, the metal yield is provided; the lime addition amount can be reduced, the lime addition amount is controlled to be less than or equal to 10 kg / t, and the cost is reduced.

The present invention provides a method for producing a sintered ore, with which it is possible to improve granulation properties of a sintering starting material even in cases where PKS charcoal is mixed with the sintering starting material in order to reduce the discharge amount of carbon dioxide, and ore concentrate is mixed with the sintering starting material in order to increase the total Fe amount.　The method for producing a sintered ore comprises: a starting material blending step (step S101) for blending and granulating an iron starting material and a solid carbonaceous material that contains a first carbonaceous material and a second carbonaceous material so as to produce a sintering starting material; a starting material layer formation step (step S102) for supplying the sintering starting material onto a pallet of a sintering machine so as to form a starting material layer; and a sintering step (step S103) for igniting and firing the upper surface of the starting material layer so as to produce a sintered ore. In the starting material blending step (step S101), palm shell charcoal is blended as the first carbonaceous material, and a carbonaceous material derived from a fossil fuel is blended as the second carbonaceous material. The arithmetic average particle diameter of the palm shell charcoal is smaller than the arithmetic average particle diameter of the second carbonaceous material.

This invention relates to the field of aluminum alloy materials technology, specifically to a low-zinc-content 6-series aluminum alloy sheet and its manufacturing method. The components and their weight percentages in the low-zinc-content 6-series aluminum alloy sheet are as follows: Si content 0.90-1.20%, Mg content 0.45-0.65%, Cu content 0.12-0.20%, Zn content 0.05-0.10%, Fe content ≤0.28%, Mn content 0.02-0.20%, Cr content ≤0.10%, Ti content ≤0.15%, containing at least one of In, Cd, La, and Ce, and the total content of In, Cd, La, and Ce is 0.01-0.10%; the content of a single impurity ≤0.03%; the total content of other impurity elements ≤0.1%; and the balance is Al. This 6-series aluminum alloy sheet, with a low zinc content (Zn ≤0.10%), possesses excellent formability, high bake hardening value, and high batch stability.

The invention relates to the technical field of metal materials, in particular to a 5-series aluminum alloy plate with low-temperature baking hardening response and a preparation method of the 5-series aluminum alloy plate. The content of Zn is 1.5%-3.5%; the content of Cu is 0.3%-1.2%; the content of Mn is 0.1 to 0.3 percent; the content of Cr is 0.03 to 0.15 percent; the content of Zr is 0.05 to 0.15 percent; the content of Ti is 0.01 to 0.10 percent; si content is less than or equal to 0.2%; fe content is less than or equal to 0.25%; the La content is less than or equal to 0.2%; the Ce content is less than or equal to 0.2%; the content of Yb is less than or equal to 0.2%; the balance is Al; the bake hardening response efficiency function phi BH of the 5-series aluminum alloy plate is 0.15-1.2; the steel plate has low yield strength, high elongation, high formability and high sinking resistance, and baking varnish hardening is guaranteed.

The invention discloses a molten aluminum refining production process capable of reducing the iron element content, and relates to the technical field of secondary aluminum refining. The process is combined with the characteristics of existing secondary aluminum refining equipment and process, and comprises the steps of pretreatment in a smelting furnace, refining in a holding furnace, online rotor refining and ceramic filtration, and multi-stage iron removal is realized by comprehensively applying a flux method, a gravity settling method and a ceramic filtration method. The iron removal flux and inert gas are blown through the rotor, the iron removal reaction is accelerated, the single-process iron removal effect and production efficiency are improved, and the flux consumption is reduced. The iron removal efficiency is stabilized at 62% or above, the iron content in the secondary aluminum is effectively reduced, the product quality is improved, and the method is suitable for industrial production.

The invention discloses a powder metallurgy near-net forming method for a high-purity iron TD4 thin-wall complex component, which belongs to the field of powder metallurgy and comprises the following steps of: 1, activating spherical TD4 iron powder with the Fe content of more than or equal to 99.8 percent and the particle size of 15-45 microns by using low-temperature plasma with the power of 100-300W for 5-15 minutes under the protection of argon; 2, the isostatic pressing graphite die is filled in a vibration mode, a cavity is compensated through the shrinkage rate of 1.2%-2.5%, and a functional gradient punch with a slightly-convex curved surface is arranged; 3, electric field activation pressure auxiliary sintering is conducted, real-time monitoring is conducted through a high-speed camera larger than or equal to 100 fps and a pyrometer, and AI dynamically regulates and controls current and pressure according to curvature variation and the like; and 4, high-purity argon is forcibly cooled at the speed of 50-100 DEG C / min under the pressure maintaining condition, sand blasting and chemical polishing are conducted after demolding, the density and size precision of the component are improved through the method, the thin wall cracking risk is reduced, and the requirement of the high-end field is met.

The invention relates to a Fe-based nanocrystalline alloy material and a preparation method and application thereof, and belongs to the technical field of nanocrystalline alloy materials. The invention provides a Fe-based nanocrystalline alloy material, the atomic percentage expression of the Fe-based nanocrystalline alloy material is FexGdyBz, x is the atomic content corresponding to the Fe element, and x is greater than or equal to 82 and less than or equal to 87; y is the atom content corresponding to the Gd element, and 0.5 < = y < = 3; z is the atom content corresponding to the element B, and z is greater than or equal to 12 and less than or equal to 16; x + y + z is equal to 100. After the Gd element is added, the coercive force of the Fe-based nanocrystalline alloy material can be further reduced, the saturation magnetization of the Fe-based nanocrystalline alloy material is improved, and the Fe-based nanocrystalline alloy material with excellent soft magnetic performance and high iron content is obtained. It is found that the contents of Fe, Gd and B elements have a certain relation, and under the specific contents, the soft magnetic performance of the Fe-based nanocrystalline alloy material can be improved.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, and at least one clay matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, characterized in that said material has a specific surface area greater than 1 m² / g and less than 50 m² / g, and said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

This invention provides a comprehensive carbon blending control system and method for sintering. The system includes a batching detection unit, a mixture detection unit, a sintering process detection unit, an FeO detection unit, and a main control unit. The method monitors multi-dimensional parameters in real time and establishes a multi-dimensional dynamic coupling correction strategy for influencing factors such as total Fe content, moisture, particle size, material layer thickness, and sintering endpoint temperature. Combined with intelligent algorithm prediction, dual-closed-loop collaborative control, and precise compensation of feed rate, the method achieves quantitative output of solid fuel feed rate through a comprehensive calculation formula. This invention achieves dynamic optimization and precise control of carbon blending, stabilizes the FeO content of sintered ore, improves sintered ore quality and blast furnace smelting efficiency, balances energy consumption optimization and cost control, and enhances the automation and intelligence level of sintering carbon blending control.

This invention discloses an aerospace aluminum rod with good ductility and low impurity content, and its preparation method, belonging to the field of metal material processing technology. The aerospace aluminum rod has an aluminum content ≥99.5%, an iron content of 0.20%-0.25%, a silicon content ≤0.04%, and a hydrogen content ≤0.22 ml / 100g Al. By precisely controlling the Fe content within the preferred range of 0.20%-0.25%, combined with multi-stage refining and purification, precise temperature-controlled casting, and surface quality control, this invention significantly reduces the impurity content of the aluminum rod, refines the grain structure, and improves its machinability and ductility. It achieves excellent processing performance, producing 200,000 meters of continuous 0.361mm ultrafine single wire without breakage, making it suitable for the large-scale production of high-end aluminum alloy wire bundles in photovoltaic, new energy vehicle, and other fields.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, and at least one alumina oxide matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, and said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The invention relates to a process pipeline welding construction management method and system, and the method comprises the steps: calculating the mean value of the iron oxide content of to-be-welded pipeline batches according to the number of pipelines and the iron oxide content of the surface of each to-be-welded pipeline; the protective gas concentration is detected and input into a welding model, and the welding model is constructed based on historical welding data and used for predicting the preset iron oxide content under the given protective gas concentration; based on the relative deviation percentage between the iron oxide content mean value and the preset iron oxide content, the difference value of the to-be-welded pipeline batches is taken; according to the difference value, initial welding energy and initial welding interval time of the welding equipment are set; dynamically adjusting the welding interval time according to the real-time concentration of the protective gas; and according to the adjusted welding interval time, the welding energy corresponding to each welding interval time is determined. Through fusion of a plurality of parameter characteristics, coordination of mutual relations among parameters, intelligent decision making and dynamic control of the welding process, the welding quality is remarkably improved.

The present invention is characterized by having: a composition having a Fe content in the range of 0.08-0.17 mass% and a P content in the range of 0.025-0.06 mass%, with the remainder being Cu and unavoidable impurities; a conductivity of 75% IACS or greater and a Vickers surface hardness of 130 HV or greater at room temperature; and a Vickers surface hardness of 40 HV or greater at 400°C.

Provided is a hot-press molded body provided with a steel base material and a plating layer disposed on the surface of the steel base material, the plating layer having a prescribed chemical composition, the plating layer containing a Fe2Al5 phase and an Fe-Al phase having an Fe content of 20-40% by mass in this order from the steel base material side, the Zn content of the Fe-Al phase being 1.5-15.0% by mass, and in the cross section of the plating layer, the Zn content is 0.1-0.5% by mass, and the Zn content is 0.1-0.5% by mass. The projected length Li of the Fe-Al-Si phase having an Si content of 5-20 mass% in the Fe2Al5 phase and an equivalent circle diameter of 2 [mu] m or more and the length L0 of the surface of the steel base material satisfy [sigma] Li / L0 < = 0.70, and the amount of the deposited plating layer is 20 g / m2 or more per surface.

This invention belongs to the field of alloys, specifically disclosing a high-strength, heat-resistant aluminum alloy wire material and its preparation method. The aluminum alloy wire material is composed of the following components by mass percentage: Fe 0.5–1.2%, Zr 0.10–0.15%, B 0.01–0.03%, RE 0.01–0.04%, Sr 0.005–0.01%, unavoidable impurities ≤0.15%, and the balance being Al; RE is selected from at least one of La and Ce. The aluminum alloy wire material of this invention has a high iron content. By introducing lower amounts of Sr and RE elements, the type, morphology, and distribution of the iron-rich phase in the aluminum alloy are improved, resulting in high room-temperature tensile strength, excellent conductivity, and good high-temperature resistance.

A welding method includes welding a die cast mould part made of an Al—Mg—Fe alloy in a fluid-tight manner to at least one other metal part. A Mg content of 4%≤Mg≤4.6% and an Fe content of 1.31%≤Fe≤1.7% are used for the aluminum alloy, as well as an admixture content of additional alloying constituents comprising a maximum of 0.2% Si. A blue diode laser is used for welding. No filler metal is used. The welding method may be used to construct an actuator housing.

This invention discloses a method for producing high-purity metallic cerium with low iron and low silicon content, relating to the field of metal smelting technology. The method comprises the following components: S1, an electrolytic raw material pretreatment step; S2, a composite molten salt system preparation step; S3, an inert-coated cathode preparation and electrolytic cell assembly step; and S4, a PLC-based intelligent electrolysis control step. This invention effectively reduces the iron and silicon impurity content in the raw materials and molten salt through rigorous pretreatment of the electrolytic raw materials and precise preparation of the composite molten salt system. Particularly during the electrolysis process, the PLC control system monitors and automatically adjusts the Fe content in the molten salt in real time. 3+ and Si 4+ Concentration, when Fe 3+ or Si 4+ When the levels exceed the limit, the system will automatically adjust the current density, temperature, and add Na2O to ensure that the iron and silicon impurities in the product are extremely low, thereby significantly improving the purity of metallic cerium.

The application discloses a high-purity iron TD4 thin-wall complex component powder metallurgy near-net forming method and belongs to the field of powder metallurgy. Step 1, spherical TD4 iron powder with Fe content greater than or equal to 99.8% and particle size of 15-45 microns is activated by low-temperature plasma under argon protection at a power of 100-300 W for 5-15 min; step 2, a vibration filling isostatic pressing graphite mold is filled, a cavity is compensated by a shrinkage rate of 1.2%-2.5%, and a functionally graded punch with a micro-convex surface is arranged; step 3, electric field activated pressure assisted sintering is carried out, a high-speed camera with a high-speed of greater than or equal to 100 fps and a pyrometer are used for real-time monitoring, and AI dynamically adjusts current and pressure according to curvature change amount; step 4, high-purity argon is forcedly cooled at a rate of 50-100 DEG C / min under pressure, and sand blasting and chemical polishing are carried out after demolding. The method improves the density and size precision of the component, reduces the risk of thin-wall cracking, and is suitable for the needs of high-end fields.

The present invention discloses a positive electrode active material and a method for producing the same, a positive electrode tab, a battery, and an electrical device, and relates to the art of batteries. In the positive electrode active material, Fe 2+ The change in content Δn ≥ 0.1, where Δn = n1 - n2, where n1 is the Fe content in the positive electrode active material before charging. 2+ This is the content of Fe in the positive electrode active material when n2 is charged to 4.0V. 2+ This is the content of Fe 2+ Fe content = Fe content in positive electrode active material 2+ Amount of substance / (Fe in positive electrode active material) 2+ Amount of substance + Fe in the positive electrode active material 3+ This is the amount of substance. As a result, when this positive electrode active material is used, the battery containing this positive electrode active material will have an excellent energy density.

The application belongs to the technical field of optical communication metal materials, and particularly relates to a copper-chromium alloy and a preparation method and application thereof. Raw materials of the copper-chromium alloy include metal raw materials and a binder, and the volume ratio of the binder to the metal is 11:100. The metal raw materials include the following components according to weight parts: Si content 0.18-0.22%, Cu content 98.5-99.5%, Fe content 0.01-0.03%, Ni content 0.02-0.04%, Cr content 0.5-1.5%, Zr content 0.05-0.25%, and Ag content 0.3-0.5%. The preparation method of the copper-chromium alloy optimizes the proportioning of the copper-chromium alloy, adjusts the element content in the batching, and is matched with a proper MIM process, so that the thermal conductivity and hardness of the material are successfully improved, and the material meets specific performance requirements.

This application relates to the field of metal material processing technology, and discloses a titanium-steel composite plate, its preparation method, and a ship. The titanium-steel composite plate includes a steel substrate layer, a pure titanium cladding layer, and an alloy layer, wherein the alloy layer is disposed between the steel substrate layer and the pure titanium cladding layer; wherein the alloy layer includes a Fe-intermediate element-Ti ternary alloy layer, and the Fe-intermediate element-Ti ternary alloy layer satisfies the following conditions along the direction from the steel substrate layer to the pure titanium cladding layer: the Fe content gradually decreases, the Ti content gradually increases, and the content of the intermediate element first gradually increases and then gradually decreases; the intermediate element is a transition element in the Fe-Ti system. This composite plate exhibits excellent interface quality, as well as excellent structural stability and corrosion resistance.

To provide a method for producing electrolytic iron foil having high purity and excellent in smoothness and flexibility.SOLUTION: The method for producing an electrolytic iron foil includes a step of forming an electrolytic iron foil F on the surface of a cathode drum 1 by using the cathode drum 1 rotating in a state of being at least partially immersed in an electrolytic solution 3 and an anode 2 arranged so as to face the cathode drum 1 in the electrolytic solution 3 and passing an electric current through the cathode drum 1 and the anode 2. The temperature of the electrolytic solution 3 is 50 to 90 °C, the content of Fe2 + in the electrolytic solution 3 is 40 to 200g / L, the pH of the electrolytic solution 3 is 2.0 to 4.0, and the density of the current is 50 to 500A / m2.SELECTED DRAWING: Figure 1

A negative temperature coefficient thermistor that includes: a ceramic base body composed of a ceramic composition containing Mn, Ni, and Fe; and an outer electrode on an end portion of the ceramic base body. The outer electrode includes an underlying layer covering the end portion of the ceramic base body and containing Cu and glass, and a plating layer covering the underlying layer. A Ni content, a Mn content, and a Fe content in the ceramic base body satisfy the following formulae (1) and (2): 26.4 mol %≤[Ni]≤29.5 mol % (1), and 1.65≤[Mn] / [Fe]≤1.90 (2). In the formulae, [Ni], [Mn], and [Fe] represent the Ni content, the Mn content, and the Fe content (mol %), respectively, when a total content of Mn, Ni, and Fe in the ceramic base body is taken as 100 mol %.

The present invention is characterized by having: a composition having a Fe content in the range of 0.08-0.17 mass% and a P content in the range of 0.025-0.06 mass%, with the remainder being Cu and unavoidable impurities; a conductivity of 75% IACS or greater and a Vickers surface hardness of 130 HV or greater at room temperature; and both a surface heatproof temperature TS and an internal heatproof temperature TI of 450°C or higher, with the ratio TI / TS of the surface heatproof temperature TS and the internal heatproof temperature TI being 0.95 or greater.

The application belongs to the technical field of metal materials, and specifically discloses a method for rapidly detecting iron content in a noble metal in a molten state, wherein a ventilation pipeline is connected to the top of an induction melting furnace to collect the gas emitted by the induction furnace, one end of the ventilation pipeline is inserted into the liquid surface of an absorption liquid in a gas absorption chamber of an iron flue gas absorption device through a gas pipe, the absorption liquid in the gas absorption chamber is used to absorb Fe ions in the gas emitted by the induction melting furnace, a collection liquid is obtained, the collection liquid is detected by using iron test paper, the color of the test paper is recorded, the actual iron content in the molten noble metal is detected by using an ICP method, a corresponding relationship between the color of the test paper and the actual iron content in the molten noble metal detected by using the ICP method is established, a standard colorimetric card is established, the colorimetric card is used to qualitatively and semi-quantitatively and rapidly judge the iron content in the noble metal in the molten state, and the ventilation time of the noble metal purified by using a high-temperature chlorination method is rapidly judged, and the method is simple and reliable.

The application relates to a gibbsite-type bauxite processing method and belongs to the technical field of mineral processing, which comprises the following steps: crushing and grading gibbsite-type bauxite to obtain coarse-grained material and fine-grained material; removing impurities from the coarse-grained material by gravity separation to obtain gravity separation concentrate and gravity separation tailings; removing impurities from the fine-grained material by centrifugal mineral separation to obtain centrifugal concentrate and centrifugal tailings; wherein the separation density of the gravity separation is 1.7-3.0 g / cm 3 ; the separation density of the centrifugal mineral separation is 1.7-3.2 g / cm 3 ; the aluminum concentrate with high alumina content, high aluminum-silicon ratio and relatively low impurity content is obtained, the tailings with high silicon dioxide content, iron content and titanium content are obtained, the method has the characteristics of short mineral separation process, low mineral separation cost, low investment, high mineral separation efficiency, the concentrate is suitable for producing alumina by the Bayer method, and the tailings are applied to the building material industry.

The invention discloses a method and device for extracting iron by reducing red mud through CH4 / CO plasma in the aluminum oxide industry, and the method comprises the following steps: feeding red mud (5) into a red mud preheater (7) for preheating, conveying the preheated red mud to an electric arc furnace (1) through a fluidized bed, and carrying out smelting reduction on the red mud and CH4 or CO plasma in the furnace to generate molten iron, furnace slag and high-temperature sodium-containing flue gas; molten iron flows out through the diversion port, and waste slag is discharged through the slag discharge port. The method solves the problems of low iron recovery rate of the high-iron red mud, high impurity content of iron ore concentrate, high alkalinity of tailings after iron extraction of the red mud and the like. Iron oxide in the red mud is reduced into sponge iron at a relatively low temperature by utilizing an efficient excited state CH4 / CO plasma reduction technology, the total iron content is more than or equal to 80%, the iron recovery rate is more than or equal to 85%, sodium elements in the red mud are synchronously removed, meanwhile, the cost of plasma CH4 is lower, and the method is suitable for large-scale industrial application.

The invention discloses a method for producing ultra-low-calcium high-purity industrial silicon through a 33MVA large submerged arc furnace, and belongs to the technical field of metallurgy and energy. Silica, bonded silica coal, unbonded silica coal and semi-coke are adopted as core production raw materials, meanwhile, wood chips are added to improve the air permeability of the materials, and introduction of iron impurities is reduced from the source by strictly controlling the iron content in all the raw materials; meanwhile, the submerged arc furnace operation technology is optimized, the iron melting phenomenon in the operation process is reduced, and the product iron content is further controlled; and the contents of aluminum and calcium in the product are obviously reduced by improving an external refining process. According to the method, ultra-low-calcium high-purity industrial silicon with marks such as Si3301, Si3302 and Si4202 can be stably produced, the minimum calcium content can be stably controlled to be 0.01% or below, compared with an existing production process, the raw materials used in the method are sufficient in market supply, the process controllability is high, the production path of the ultra-low-calcium high-purity industrial silicon is widened, production energy consumption and cost are reduced, and the requirement for green metallurgy development is met.