293 results about "Fe content" patented technology

The invention discloses a ZnFeP-particle gradient abrasion-resistant chemical composite coating and a preparation method of the ZnFeP-particle gradient abrasion-resistant chemical composite coating. The ZnFeP-particle gradient abrasion-resistant chemical composite coating is divided into a passivation layer, a low-iron ZnFeP-particle chemical composite coating and a high-iron ZnFeP-particle chemical composite coating from outside to inside, and a gradient coating with the corrosion potential from low to high is formed; the content of iron in the low-iron ZnFeP-particle chemical composite coating ranges from 0.03 wt% to 1.0 wt%, the thickness of the low-iron ZnFeP-particle chemical composite coating ranges from 8 micrometers to 18 micrometers, and the hardness of the low-iron ZnFeP-particle chemical composite coating ranges from 150 HV to 300 HV. The content of iron in the high-iron ZnFeP-particle chemical composite coating ranges from 5 wt% to 30 wt%, the thickness ranges from 8 micrometers to 18 micrometers, and the hardness ranges from 500 HV to 650 HV. By means of the ZnFeP-particle gradient abrasion-resistant chemical composite coating, a metal component can be resistant to abrasion and corrosion, and therefore the service capacity of the metal component such as electric power fittings in the abrasion working condition is obviously improved.

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.

Provided is an Al alloy for casting, which can achieve both high mechanical properties and cost reduction. An Al alloy for casting according to the present invention contains 8.0 to 10.0 mass% of Si, 0.25 to 0.40 mass% of Mg, 0.30 to 0.50 mass% of Fe, 0.28 to 0.52 mass% of Mn, 0.08 to 0.22 mass% of Cu, 0.04 to 0.15 mass% of Ti, and 0.0075 to 0.028 mass% of Sr, with the balance being Al. The sum of the Fe content and the Mn content is limited to 1.0 mass% or less. Sr is not added in the dissolution step, but is added in a molten metal treatment step in which the Al oxide and H2 gas in the Al alloy molten metal obtained in the dissolution step are removed.

The invention belongs to the field of electronic chemical purification, and particularly relates to a method for strengthening a phosphoric acid melt crystallization process through ultrasound and residual liquid circulation, which comprises the following steps: adding a high-concentration phosphoric acid raw material into a static melt crystallizer, cooling and graining, and enhancing the purity by adopting ultrasound in a sweating stage, high-concentration uncrystallized raffinate is cooled by an external circulation coil heat exchanger and then flows back to a crystallizer, crystallization continues to be carried out, the yield is increased, and the Fe content can be reduced to 20 ppb from 73 through crystallization purification. The concentration of phosphoric acid adopted by the method is greater than or equal to 85%, the problems of poor impurity removal effect, low yield and long consumed time of a conventional static crystallization method are solved, the uncrystallized residual liquid is fully recycled, the energy consumption is reduced, and the method has high applicability.

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 field of metallurgy, and provides an efficient titanium slag smelting method which comprises the following steps: controlling the total charging quantity of titanium concentrate in a single furnace according to the effective volume and rated power supply power of an electric furnace, blanking according to a fixed feeding speed, and calculating the total charging quantity of a reducing agent in the single furnace based on the total charging quantity of the titanium concentrate in the single furnace, blanking is carried out according to the feeding speed from high to low; the titanium concentrate and a reducing agent are conveyed into a smelting furnace to be subjected to continuous micro-negative-pressure smelting, first-time deslagging operation is carried out, a first part of titanium slag is obtained, and electrification is maintained; and when the total iron content of the first part of titanium slag is reduced to an expected value, electrifying is stopped, secondary slag tapping and iron tapping operation are carried out, and a second part of titanium slag and low-carbon molten iron are obtained. According to the method, on the premise that the unit furnace burden reducing agent adding amount and the unit power supply power are not changed, the furnace feeding system and the corresponding power supply power of the reducing agent are adjusted, so that the high-and-low carbon adding system and the low-and-low power supply system are formed, and the smelting efficiency in the titanium slag smelting process is effectively improved.

The invention discloses a smelting method for low-alkalinity and low-total-iron converter dephosphorization, and belongs to the technical field of steel smelting. Ore, lime, dolomite and light-burned dolomite are added for slagging in the early stage and the middle stage of converter smelting; after TSC measurement in the later period of smelting, high-lance-position oxygen supply blowing is adopted, ore is added in the period to promote slagging and dephosphorization, then low-lance-position oxygen supply blowing is adopted, DRI is added into the converter in the period, bottom blowing is reasonably controlled to reduce the total iron content of the steel slag, generation of MgO solid particles and C2S-C3P solid solution is promoted, and therefore the purposes of low alkalinity and low total iron dephosphorization at the end point of the converter are achieved. The alkalinity R of the final slag of the converter is controlled to be 2.4-2.8, the content of MgO is controlled to be 8.0-11.0%, the content of total iron is controlled to be 10.0-15.0%, and the content of P in the final molten steel is smaller than or equal to 0.02 wt%.

The invention discloses a renewable high-pressure casting heat-treatment-free aluminum alloy and a preparation method and application thereof.The microstructure in an alloy body comprises an alpha-Al matrix, an Al-Si eutectic structure and a Fe-containing second phase, and the equivalent diameter of the alpha-Al matrix is smaller than or equal to 15 micrometers, the equivalent diameter of a pre-crystallization structure is smaller than or equal to 30 micrometers, and the equivalent diameter of the Al-Si eutectic structure is smaller than or equal to 30 micrometers. The area proportion of the pre-crystallization structure on an observation interface is smaller than or equal to 15%, the pre-crystallization structure comprises a primary alpha-Al phase and a primary Fe-rich phase, and the average equivalent diameter of the Fe-containing second phase is smaller than or equal to 10 micrometers. The preparation method has the following advantages that the cost is low, the mechanical property is excellent, the raw material source is wide, and the tolerance to impurity elements such as Fe content is high; a heat treatment process is not needed, and energy conservation and emission reduction are achieved.

The invention provides a high-yield-ratio 6056 aluminum alloy rod and a preparation method thereof, and belongs to the technical field of aluminum alloy. The 6056 aluminum alloy rod with the high yield ratio, provided by the invention, comprises the following chemical components in percentage by mass: 1.0 to 1.5 percent of Si, 0.10 to 0.25 percent of Fe, 0.75 to 0.85 percent of Cu, 0.55 to 0.65 percent of Mn, 0.9 to 1.2 percent of Mg, less than 0.05 percent of Cr, 0.2 to 0.25 percent of Zn, 0.03 to 0.05 percent of Ti, less than 0.002 percent of Sr, 0.001 to 0.005 percent of B, 0.11 to 0.17 percent of Zr, 0.1 to 0.2 percent of rare earth and the balance of Al. The ratio of Si to Mg is greater than or equal to 1.2. By regulating and controlling the contents of Si, Mg, Cu, Zn, Mn and Fe, the Si / Mg ratio is strictly controlled, and the yield ratio of the aluminum alloy can be increased in cooperation with rare earth.

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.

Provided is a hot-stamp molded body characterized by comprising a steel base material and a plating layer disposed on the surface of the steel base material, and in that: the plating layer has a prescribed chemical composition; the plating layer includes, in order from the steel base material side, an Fe2Al5 phase and an Fe-Al phase having an Fe content of 20-40 mass% the Zn content of the Fe-Al phase being 1.5-15.0 mass%; in a cross section of the plating layer, the projected length Li of Fe-Al-Si phases which have an equivalent circle diameter of 2 µm and in which the Si content in the Fe2Al5 phase is 5-20 mass%, and the length L0 of the surface of the steel base material satisfy the expression ΣLi / L0 ≤ 0.70; and the adhesion amount of the plating layer is 20 g / m2 or more per one surface.

The invention belongs to but not limited to the technical field of metal impurity removal, and particularly relates to a method and system for removing iron elements in secondary aluminum based on a centrifugal casting method.The method comprises the steps that S1, raw materials are prepared, specifically, secondary aluminum raw materials are collected, classified and treated, impurities and oil stains in the secondary aluminum raw materials are removed, and the quality of the raw materials is ensured; s2, preheating treatment is conducted, specifically, the secondary aluminum raw material is heated to a certain temperature to reach a proper casting temperature; s3, centrifugal casting is conducted, specifically, centrifugal casting equipment is adopted, the preheated secondary aluminum raw material is injected into a rotating mold, and iron elements in molten aluminum are gathered towards the wall face of the mold under the action of centrifugal force; s4, separation and collection: after the molten aluminum is cooled and solidified, the casting is taken out of the mold, an iron element enrichment layer on the surface of the casting is removed through a mechanical or chemical method, and secondary aluminum with the low iron content is obtained; and S5, follow-up treatment is conducted, specifically, the obtained low-iron-content secondary aluminum is further treated, including refining and alloying, so that different application requirements are met.

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 discloses a steel / aluminum dissimilar metal laser welding method based on a FeCoCuSiNi / FeCoCuSiNiAl high-entropy alloy transition layer, and belongs to the technical field of dissimilar metal laser machining. In a FeCoCuSiNi / FeCoCuSiNiAl high-entropy alloy transition layer prepared through a spark plasma sintering process, the Fe content in a FeCoCuSiNi high-entropy alloy is highest and the Al content in the FeCoCuSiNi high-entropy alloy is lowest, the Al content in the FeCoCuSiNiAl high-entropy alloy is highest and the Fe content in the FeCoCuSiNi high-entropy alloy is lowest, during welding, the FeCoCuSiNi high-entropy alloy is in butt joint with stainless steel, the FeCoCuSiNiAl high-entropy alloy is in butt joint with aluminum alloy, laser welding is conducted on the two butt joint faces respectively, and the welding quality of the FeCoCuSiNi / FeCoCuSiNiAl high-entropy alloy is improved. The formation of a brittle Fe-Al intermetallic compound of the steel / aluminum dissimilar metal welding joint is restrained by utilizing the high-entropy effect and the hysteresis diffusion effect of the high-entropy alloy, the structure of the welding interface is improved, the bonding strength of the welding interface is improved, the mechanical property of the welding joint is further improved, the yield strength of the welding joint can reach 57% of that of an aluminum alloy base material, and the welding quality is improved. And the tensile strength can reach 70% of that of an aluminum alloy base material.

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 relates to the field of powder injection molding materials, in particular to a metal injection molding aluminum-containing stainless steel material and a preparation technology, and the stainless steel material comprises the following components in percentage by mass: 6-8 wt% of Ni, 15-18 wt% of Cr, 0.5-2.5 wt% of Al and 1t of C; 0.2 wt%, and the O content is lt; the low-carbon and low-oxygen metal powder is obtained through vacuum gas atomization, the metal powder is formed through the injection molding process and then is degreased through organic oxalic acid, hydrogen is adopted in the whole process of the thermal degreasing stage, and the low-carbon and low-oxygen metal powder is obtained through the gas atomization powder preparation process, so that the low-carbon and low-oxygen metal powder is obtained. The aluminum-containing stainless steel material which is low in carbon, low in oxygen, high in compactness, high in strength, high in corrosion resistance and high in high-temperature creep resistance is obtained through the processes of heat treatment, rapid heating and heat preservation, and the C content of the stainless steel material prepared through the preparation process is 1t after heat treatment; 0.2 wt%, oxygen content lt; the 0.2 wt% structure is compact, the sintering density is high, and the normal-temperature and high-temperature mechanical strength is higher than that of conventional materials such as 304L, 316L and 17-4PH.

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 belongs to the technical field of non-ferrous metal smelting, and particularly relates to a method for separating Fe impurity elements in aluminum alloy waste. Testing the components of the aluminum alloy waste, and determining the Fe content; melting the waste materials and adjusting the components. Casting an alloy ingot, cutting a cylindrical test bar, heating and solidifying; in the directional solidification process, Fe and transition metal elements are segregated towards one end of the sample, and an Fe-containing intermetallic compound is formed. The segregation of Fe impurity elements is promoted by utilizing the distribution coefficient difference of Fe impurity elements and alpha-Al solute and combining zone melting with directional solidification. And after the Fe impurity element enrichment end alloy is cut off, the process is repeated again, and the Fe impurity element content in the alloy is gradually reduced through multiple times of treatment until the alloy with the ultralow Fe impurity element content is obtained. According to the method, segregation and separation of the Fe element are achieved by combining zone melting with the directional solidification technology, the alloy with the extremely low Fe element content is obtained through multiple times of circulation, and high-quality regeneration of the aluminum alloy waste is facilitated.

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 invention discloses a heat-treatment-free vacuum die-casting aluminum alloy with ultrahigh Fe content and a preparation method of the heat-treatment-free vacuum die-casting aluminum alloy. The heat treatment-free vacuum die-casting aluminum alloy with the ultrahigh Fe content is prepared from the following components in percentage by mass: 1.5 percent to 2.0 percent of Fe, 0.2 percent to 1.5 percent of Ni, 0.5 percent to 1.0 percent of Si, 0 to 0.5 percent of Cu, 0 to 0.5 percent of Zn, 0.02 percent to 0.10 percent of B and the balance of Al and inevitable impurities. The aluminum alloy obtained through vacuum die-casting forming has the advantages of being high in strength and toughness, high in impurity Fe content and recyclable, the tensile strength at the room temperature is 250-360 MPa, the elongation rate can reach 24% at most, and the technical requirements for high-strength and high-toughness near-net forming in the fields of new energy automobiles, high-speed rails and aerospace can be met.

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 invention discloses a pellet preparation method for improving the proportion of hematite, and relates to the technical field of sintering processes, and the method comprises the following specific steps: preparing a hematite raw material, crushing and screening the hematite raw material to obtain hematite particles with the particle size range of 0.1-0.5 mm, the hematite raw material chemical components comprise 60% of Fe, 5% of SiO2 and 3% of Al2O3, the surface activity of hematite particles is enhanced through hematite surface modification treatment, the compatibility of the hematite particles and a novel composite binder is greatly improved, the composite binder is composed of modified starch and a derivative of polyvinyl alcohol, and the hematite raw material has the advantages that the surface activity of the hematite particles is improved; by optimizing the proportion and adopting a step-by-step adding mode and a gradient adding mode, the nano-material additive can be more uniformly distributed among hematite particles, the bonding force among the particles is enhanced, meanwhile, the nano-material additive is filled in tiny gaps of the hematite particles, grains are refined, the grain boundary bonding force is enhanced, and the pellet strength is further improved.