223 results about "Fe content" patented technology

The invention belongs to the technical field of aluminum alloy production, and particularly discloses a low-carbon environment-friendly method for producing a 3104 alloy blank with a high secondary aluminum proportion, which comprises the procedures of smelting, melt purification, online degassing filtration, continuous casting and triple continuous rolling, and is characterized in that alloy components are optimized, secondary aluminum waste is used in a large proportion, the Fe content is increased, and the production cost is reduced. Iron and elements such as manganese in the aluminum alloy form intermetallic compounds, the intermetallic compounds can serve as heterogeneous nucleation, obviously refine alloy grains during casting and increase Fe content, the performance of the 3104 alloy blank is improved, meanwhile, aluminum is replaced with iron, the main material cost can be reduced, in addition, due to the fact that the rolling temperature of an inlet of each rack is high, and meanwhile the finish rolling temperature is also high, the service life of the 3104 alloy blank is prolonged. The self-tempering effect is achieved, internal dislocation of materials is eliminated, the blank edge cracking condition is improved, strip breakage caused by the edge cracking problem in the subsequent rolling process is avoided, safe production is guaranteed, the main material cost is reduced, meanwhile, the blank performance is improved, the 3104 alloy blank is efficiently produced in a high-quality mode, and the purposes of low carbon and environment protection are achieved.

The invention provides a 6-series aluminum bar prepared from high-proportion recycled aluminum and a preparation method of the 6-series aluminum bar, and relates to the technical field of secondary aluminum preparation. Wherein the 6-series aluminum bar comprises the following components in percentage by mass: 0.6-1.2% of Mg; 0.5 to 0.9 percent of Si; cu: less than or equal to 0.3%; 0.25 to 0.42 percent of Mn; 0.25 to 0.35 percent of Fe; cr: less than or equal to 0.2%; zn: less than or equal to 0.2%; ti: less than or equal to 0.1%; other inevitable single impurity elements are less than or equal to 0.05%, and total impurity elements are less than or equal to 0.15%; the balance is Al; wherein the adding proportion of the secondary aluminum is larger than or equal to 50%; mn / Fe is greater than or equal to 0.9 and less than or equal to 1.1; and 0.4 < = (Si-Mg / 1.73) / Fe < = 0.6. Through component design and process optimization, the influence of the impurity element Fe content in the high-proportion secondary aluminum 6-series casting rod is compatible, the Fe content tolerance of the aluminum alloy is improved to 0.35%, and the performance of the aluminum alloy reaches the grade of primary aluminum.

Provided is a copper foil with a carrier, whereby the carrier can be easily peeled off even after high-temperature pressing at a temperature exceeding 350 DEG C. This copper foil with a carrier is provided with a carrier, an intermediate layer, and a copper foil in this order, wherein the intermediate layer has a Cr phase, an Ni-P phase, and a Mo-Fe-Ni phase. In the surface of the carrier on the intermediate layer side, the ratio of the surface covered with the Mo-Fe-Ni phase is from 61.00% to 96.00% (inclusive). The Ni / Mo ratio, which is the ratio of the amount of deposited Ni to the amount of deposited Mo in the intermediate layer, is 2.00 or more. The Fe content of the intermediate layer, which is the ratio of the amount of deposited Fe to the total amount of the amount of deposited Mo, the amount of deposited Ni, and the amount of deposited Fe, is 8.90% or less.

The invention discloses an alloyed hot-dip galvanized steel sheet, a substrate of the alloyed hot-dip galvanized steel sheet contains 0-1.0% by mass of Si, the average Fe content in an alloyed hot-dip galvanized layer of the alloyed hot-dip galvanized steel sheet is 7-10% by mass, and the surface phase structure of the alloyed hot-dip galvanized layer contains a columnar zinc-iron alloy phase, the ratio R of the length to the width of the columnar zinc-iron alloy phase is greater than or equal to 2 and less than or equal to Rlt; 7. The pulverization grade of the alloyed hot-dip galvanized steel plate is smaller than or equal to 6 grade, and the pulverization resistance is good. The invention further discloses a manufacturing method of the alloyed hot-dip galvanized steel plate, the manufacturing method is suitable for the low-silicon steel plate, and the alloy phase structure of a steel plate coating is controlled by controlling the air-fuel ratio in the preheating stage in the continuous annealing step, the dew point DP in the soaking stage and the alloying temperature in the alloying step, so that the pulverization resistance of the steel plate is improved.

The invention relates to the field of metal materials, in particular to a high-strength and high-toughness die-casting aluminum alloy and a preparation method thereof.The high-strength and high-toughness die-casting aluminum alloy comprises, by weight, 4.0%-4.5% of magnesium, 1.8%-2.6% of silicon, 0.5%-2.0% of iron, 0.3%-1.2% of manganese, 0.3%-1.2% of chromium, 0.5%-3.0% of zinc and the balance aluminum and inevitable impurities; the sum of the weight percentages of manganese and chromium is greater than or equal to the weight percentage of iron. The problems that an existing die-casting aluminum magnesium alloy is low in strength, difficult to regenerate and high in process cost can be solved, and certain strength and toughness can still be guaranteed while the high iron content is achieved.

The invention relates to a low-cost heat-resistant aluminum alloy suitable for selective laser melting as well as a preparation method and application of the low-cost heat-resistant aluminum alloy, and belongs to the technical field of additive manufacturing aluminum alloys. The heat-resistant aluminum alloy comprises 2.0%-3.4% of Mn; 0.5% to 0.65% of Sc; ni: 1.0% to 2.5%; 1.0% to 1.5% of Fe; 0.61% to 1.0% of La; 1.1% to 1.8% of Ce; zr: 0.25% to 0.45%; and Al: the balance. The content of Mn is controlled to be 3.4% or below, the content of Sc is controlled to be 0.65% or below, meanwhile, the content of Fe is controlled to be 1.0% or above, the production cost can be reduced, the adaptability of the additive manufacturing forming technology can be improved, and it is guaranteed that no cracking problem exists in the printing process.

The invention relates to the cross technical field of nuclear reactor engineering and corrosion engineering, in particular to a radioactive isotope tracing-based fuel cladding tube surface scale on-line measurement device, which comprises an injection control module for injecting a radioactive 59Fe solution into a coolant and adjusting and controlling the 59Fe content by analyzing the Fe ion concentration; the test module is used for testing the surface of the fuel cladding based on the coolant injected with the radioactive 59Fe solution; and the measuring module is used for collecting the radioactive activity of 59Fe in scale generated on the surface of the fuel cladding after the test and speculating the scale mass surface density. According to the method, the content of the 59Fe in the coolant is controlled, and the radioactive activity of the 59Fe in the scale deposit on the surface of the fuel cladding is detected on line, so that the mass of the corresponding 59Fe can be accurately calculated, the scale deposit mass is speculated, the scale deposit information on the surface of a cladding pipe is obtained in real time, and the dynamic change condition of the scale deposit is reflected in time.

The invention relates to the technical field of copper smelting processes, in particular to a smelting stage optimization method of a double-furnace continuous copper smelting process. The method comprises the following steps: firstly, determining the types of raw materials entering a furnace during smelting of the double-furnace continuous copper smelting process, further determining the existing forms of Cu and Fe, and obtaining the mass or proportion of materials entering the furnace through theoretical calculation; the thermodynamic influence law of different slag types, oxygen enrichment concentrations and smelting temperatures on the copper content in smelting slag is studied, the equilibrium distribution law of Cu and Fe in slag / matte / gas phases in different slag systems is explored, and under the condition that the appropriate slag amount, the high matte yield, the high Cu content in the matte phase, the low impurity Fe content and the low Cu content in the slag phase are guaranteed, the copper content in the slag phase is increased, and the copper content in the slag phase is increased. And determining smelting process parameters. According to the method, multi-element phase equilibrium calculation in the copper smelting stage is carried out for different raw materials entering the furnace, accurate smelting parameters can be obtained, and the method has the advantages of improving production efficiency, reducing cost, reducing environmental pollution, improving product quality, enhancing process control and the like.

The invention provides an aluminum alloy material and a manufacturing method thereof, the aluminum alloy material is used for semiconductor equipment, the aluminum alloy material contains Al and inevitable impurities, and further contains the following chemical elements in percentage by mass: 0.5-0.7% of Si, 0.05-0.15% of Fe, 0.2-0.3% of Cu, less than or equal to 0.15% of Mn, 0.8-1.2% of Mg, 0.15-0.35% of Cr, and the balance of Al and inevitable impurities. Fe / Si is greater than or equal to 0.08 and less than or equal to 0.28, and Mg / Si is greater than 1.73 and less than 1.83. According to the aluminum alloy material, the mass percentage content of Fe is limited to be 0.05-0.15%, and Fe / Si is larger than or equal to 0.08 and smaller than or equal to 0.28, so that the Fe content and the Fe / Si ratio are controlled within a proper range, and the precipitation number of an AlFeSi phase in the casting process can be reduced on the basis of ensuring that the mechanical property is not lost.

The invention belongs to the technical field of alloy materials, and particularly relates to a steel plate, a hot stamping part and a manufacturing process and application thereof. The hot stamping part comprises a steel substrate, an alloy layer and an oxide layer, and the alloy layer is located between the steel substrate and the oxide layer; wherein the proportion of the phase with the Fe content of 40-95 wt% in the alloy layer is larger than 80%, and the average value of the maximum Feret diameter of the phase with the Fe content of 40-95 wt% in the alloy layer is larger than or equal to 7 micrometers. According to the hot stamping part, the phase structure and proportion in the alloy layer of the hot stamping part are specially regulated and controlled, and the number of cracks is effectively reduced while the crack depth is controlled.

The invention relates to a high-iron-content aluminum alloy welding wire and a preparation method and application thereof, and belongs to the technical field of welding. The aluminum alloy welding wire with the high iron content is composed of, by mass, 1.0%-3.0% of Si, 0.8%-3.5% of Fe, 1.0%-3.0% of Mn, 0.2%-1.5% of Cr, 0.2%-1.5% of V and the balance Al and other inevitable impurities. The mass ratio of Mn to Fe is 0.85 to 1.0; the mass ratio of Cr to Mn is 0.25 to 0.4; the mass ratio of (Mn + Cr) / Fe is 1.1-1.3; the mass ratio of V / (Mn + Cr) is 0.2-0.3; and the mass ratio of Si to (Fe + Mn + Cr + V) is 0.35-0.5. And the comprehensive performance of the welding seam is improved through an organization regulation mechanism.

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 preparation method of an aluminum-iron alloy based on recycled waste. The method comprises the steps that S1, regenerated waste aluminum, regenerated waste iron and a grain refiner are put into a rotary furnace to be treated; s2, the pretreated raw materials are put into an alloying furnace to be refined; s3, the molten aluminum-iron alloy refined through the alloying furnace is cast into an alloy ingot with the required specification through casting equipment, the temperature of the molten alloy is monitored in real time through a temperature sensor in the casting process, and it is ensured that the temperature is stabilized at 740-750 DEG C; and S4, a robot is adopted for automatic unloading, high-temperature stacking and packaging. The duplex process of rotary furnace pretreatment and alloy furnace gradient refining is adopted, and industrial verification shows that the fluctuation range of the alloy component content in the prepared aluminum-iron alloy is decreased, and the Fe content is controlled to be + / -0.8%; the elongation of the product is improved by 12%; the yield of the iron element is increased to 94.5%, and the energy consumption is reduced to 680kWh / ton; the cost is greatly reduced, the cost per ton is reduced by 1350 yuan, and the use ratio of the regenerated material is 97%; and the production period is shortened to 4.2 hours per furnace.

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.

To provide an unpainted aluminum alloy sheet for a can lid capable of achieving both high strength and high toughness while blending a scrap raw material derived from a can material.SOLUTION: An uncoated aluminum alloy sheet for a can lid according to an aspect of the present disclosure contains 0.10 mass% or more and 0.60 mass% or less of Si, 0.20 mass% or more and 0.70 mass% or less of Fe, 0.10 mass% or more and 0.40 mass% or less of Cu, 0.5 mass% or more and 1.2 mass% or less of Mn, and 1.1 mass% or more and 4.0 mass% or less of Mg, wherein the 0.2% yield strength σ0.2, the tensile strength σB, and the average value of the 0.2% yield strength and the tensile strength σfm satisfy the following formula (1-1). σfm / (σ0.2 / σB)≥380 MPa (1-1)SELECTED DRAWING: None

The invention discloses a method for efficiently removing iron from a regenerated Al-Si alloy, which is characterized in that by controlling the content of Si, the mass percent of the Si is in a range of 10.0-12.6%, the heat preservation temperature of iron removal is reduced, the sedimentation efficiency of an iron-rich phase is improved, the mass ratio of (Mn + Cr) / Fe is controlled to be 0.5-1.0, the proportion of components and the sedimentation temperature are optimized, and the iron removal efficiency is improved. And the iron removal efficiency and the production efficiency are further improved. Besides, secondary aluminum with high Fe content is added through a step-by-step method, an electromagnetic stirring system is combined, melting of the secondary aluminum with high content is effectively accelerated, the production efficiency is improved, the Al-Sr-RE composite alterant with a specific proportion is added, sedimentation of an iron-rich phase can be further accelerated, the iron removal rate and the production efficiency are improved, and a subsequent refining agent with a specific proportion is combined, so that the iron removal efficiency is improved. And castings or regenerated aluminum alloy ingots with few impurities and excellent mechanical properties are obtained, the balance of the iron removal rate and the production efficiency is achieved on the whole, and the comprehensive performance of the regenerated aluminum alloy is remarkably improved.

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 invention relates to the field of aluminum alloy material processing, in particular to a high-strength corrosion-resistant marine aluminum alloy profile and a preparation method of the high-strength corrosion-resistant marine aluminum alloy profile. The content of Fe is 0.24 to 0.26 percent; the content of Cu is 0.05 to 0.15 percent; the content of Mn is 0.6 to 0.8 percent; the content of Mg is 4.7 to 4.9 percent; the content of Cr is 0.05 to 0.25 percent; the content of Zn is 0.15 to 0.25 percent; the content of Zr is 0.05 to 0.12 percent; the content of Ti is 0.01 to 0.012 percent; the content of B is 0.001-0.0025%, and the single content of other impurity elements is less than or equal to 0.05%; the total content of other impurity elements is less than or equal to 0.15%; the balance is Al; the weight percentage ratio of Ti to B is (5.2-5.7): 1, the weight percentage ratio of Zr to B is (22-55): 1, and the aluminum alloy profile for ships has high strength and high corrosion resistance and meets the development requirements of the ship industry.

The invention relates to the field of aluminum alloy bus ducts, in particular to a 6-series aluminum conducting bar for an aluminum alloy bus duct and a preparation method of the 6-series aluminum conducting bar. The content of Mg is 0.35 to 0.60 percent; fe content is less than or equal to 0.3%; the content of Cu is less than or equal to 0.05%; the content of Mn is less than or equal to 0.05%; the Zn content is less than or equal to 0.1%; the single content of other impurity elements is less than or equal to 0.03%; the total content of other impurity elements is less than or equal to 0.1%; the balance is Al; the content of Mg2Si is 0.80-0.90%, the IACS (International Annealed Copper Standard) of the conducting bar can reach 57% or above, and the tensile strength is greater than or equal to 120MPa.

To provide a Cu-based powder allowed to prepare a Cu-based material that Fe in the Fe-based material is not to excessively diffuse toward the Cu-based material if the Cu-based and Fe-based materials are both used for diffusion-bonding or infiltration and is excellent in diffuseness to the Fe-based material, and moreover to suppress the hindrance to diffusion-bonding, infiltration or sintering by a SiO2 oxide film because of a reduced solid-solubility limit of Si to a Cu phase and it is less apt to form a SiO2 oxide film over a powder surface.SOLUTION: A Cu-based powder comprises an Fe content of 1.5 mass% or higher and 5.0 mass% or lower, a Mn content of 0.3 mass% or higher and 6.0 mass% or lower, a Si content of 0.25 mass% or lower, an O content of 0.25 mass% or higher and 0.55 mass% or lower, and the remainder of Cu and inevitable impurities.SELECTED DRAWING: None

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 non-ferrous metal smelting, in particular to a method for predicting the iron content in copper flash smelting copper slag on line and model construction, starting from the actual incidence relation of copper slag and production input, model training-verification-testing is carried out through input data and output data of historical copper slag production, and the iron content in the copper flash smelting copper slag is predicted. And the input data of the copper flash smelting copper slag in a certain time period are obtained in real time and serve as model input to be substituted into the prediction model for on-line operation, the predicted value of the iron content in the copper slag discharged at the corresponding time point is obtained in real time, the problem that input data and output data of the prediction model constructed in the prior art are not matched is solved, and the prediction accuracy is improved. And online accurate prediction of the iron content in the copper flash smelting copper slag is realized.

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 steel plate, a hot stamping part and a preparation method and application thereof, and belongs to the technical field of alloy materials, the hot stamping part comprises an oxide layer, an alloy layer and a steel matrix, and the alloy layer is located between the oxide layer and the steel matrix; in the alloy layer, the phase proportion of the phase with the Fe content of 45 wt.%-95 wt.% is larger than or equal to 80%, and the occurrence frequency of the coincidence lattice grain boundary sigma 3 of the phase with the Fe content of 45 wt.%-95 wt.% is larger than or equal to 1%. In addition, the invention further discloses a steel plate component and a preparation method of the hot stamping part and a hot forming process of the hot stamping part. According to the method, the LME resistance of the Fe content in the alloy layer is improved, meanwhile, the crystal configuration of the plating layer is regulated and controlled, the frequency of the coincidence lattice grain boundary sigma 3 of the phase with the Fe content of 45 wt.%-95 wt.% in the zinc-iron alloy layer is improved, and the corrosion resistance of a hot forming part is considered while the LME resistance is achieved by means of the good intergranular corrosion resistance of the coincidence lattice structure.

The utility model discloses a device for detecting the iron content of glaze in Jianzhan production. The device comprises a main body assembly, wherein the main body assembly comprises a workbench, a detection box, a magnet tester, a circular plate and a hydraulic cylinder; the limiting assembly comprises a placing disc, a movable groove, a guide frame, a clamping block, a rotating gear, a spring rod and a sliding plate; the containing disc is fixedly connected to the top of the circular plate, the movable groove starts from a top center shaft of the containing disc, the guide frame is fixedly connected to the bottom of the inner wall of the containing disc, the clamping block is rotationally connected to one side of the inner wall of the guide frame, the rotating gear is fixedly connected to one end of the bottom of the clamping block, and the sliding plate is slidably connected to the inner side wall of the guide frame. The utility model relates to a glaze detection device, in particular to a glaze detection device, and aims to solve the problem that when an existing detection device is used for detecting glaze produced by Jianzhan, a vessel containing the glaze produced by Jianzhan is generally directly placed at a detection position for detection, the vessel is easily influenced by external factors in the detection process and is scattered, and the detection result of the glaze produced by Jianzhan is influenced.

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.