597 results about "Iron alloys" patented technology

The invention discloses a 340MPa grade P-containing hot-dip galvanized iron alloy high-strength IF steel, the chemical composition of which is as follows by weight: C: ≤0.003%, Si: ≤0.03%, Mn: 0.35-0.65%, P: 0.03-0.075%, S≤0.010%, Als: 0.020-0.045%, Nb: 0.008-0.015%, Ti: 0.02-0.03%, B: 0.0004-0.0010%, N≤0.0035%, and the remainder is Fe and unavoidable impurities; The elements also meet the following restrictions: calculated according to the corresponding weight percentage of each element, 10C+3N+2S≤Ti+2Nb≤12C+3N+2S, 60B≤P≤80B; the present invention adds P element to IF steel, and through composition and process optimization control, obtains a P-containing hot-dip galvanized iron alloy high-strength IF steel with a yield strength of 180-320 MPa, a tensile strength of 340-440 MPa, an elongation of 35-46%, a value (average plastic strain ratio) ≥1.8, high surface quality, high formability, and good cold brittleness.

The invention belongs to the technical field of solid oxide batteries, and discloses a nickel-iron support body of a metal-supported solid oxide battery, a total battery and a preparation method. The nickel-iron supporting body of the metal-supported solid oxide battery is made of a nickel-iron alloy material in a reducing atmosphere, a gradient pore structure with gradient pore distribution is prepared and formed through a double-layer casting phase inversion process, and the gradient pore structure is a composite structure comprising a finger-shaped pore channel layer and a skin layer. Compared with a ceramic material, the composite material has higher mechanical strength and thermal conductivity, can better bear thermal shock and mechanical stress, is particularly suitable for high-temperature and rapid thermal cycle working environments, and can keep good structural stability under the rapid heating condition of 50 DEG C / min.

The invention discloses a cyanide-free cadmium-iron alloy plating process for high-strength structural steel. The cyanide-free cadmium-iron alloy plating process comprises the step that a nickel-titanium alloy plating layer, a cyanide-free cadmium-iron alloy plating layer and a hexavalent chromium passivation film are sequentially prepared on a high-strength structural steel substrate from inside to outside. The prepared sample piece is subjected to a hydrogen brittleness test according to HB 5067.1-2005 Part 1 of hydrogen brittleness test of plating process: Mechanical Method, and the test result meets the standard requirement; the surface of a plated part is free of white rust after being subjected to an acetate mist test for 400h according to GB / T 10125-2021 Artificial Atmosphere Corrosion Test Salt Spray Test, and a plating layer of the plated part has excellent corrosion resistance; according to GB / T 5270-2005 < GB / T 5270-2005 < GB / T > 5270-2005 < GB / T > 5270-2005 > < GB / T > 5270-2005 > < GB / T > 5270-2005 > < GB / T > 5270-2005 > < GB /

The invention discloses an iron alloy electrode paste and a preparation process, and belongs to the technical field of electrode paste preparation, the iron alloy electrode paste comprises a composite aggregate system and a composite binder system, the composite aggregate system comprises the following components by mass: 40-60% of anthracite aggregate, 15-25% of artificial graphite flake, and 3-8% of silicon carbide whisker; the composite binder system comprises the following components in percentage by mass: 70-80% of medium-temperature modified coal pitch, 10-15% of furan resin and 5-10% of dispersion liquid containing nano boron carbide, and the composite binder system is combined with the composite aggregate system through a gradient permeation process to form a three-dimensional conductive network and an enhanced interface; the composite aggregate system and the composite binder system are optimally proportioned, and gradient permeation and gradient kneading processes are combined, so that the comprehensive performance of the electrode paste is remarkably improved, the thermal shock resistance is greatly improved and the linear shrinkage rate is reduced while low resistivity is maintained, the electrode paste is suitable for smelting ferroalloys such as silicomanganese and ferrochromium, and the service life is remarkably prolonged.

The invention relates to the technical field of magnetic materials, in particular to high-performance samarium-iron-nitrogen powder and a preparation method and application thereof. The invention provides a preparation method of samarium-iron-nitrogen powder, which comprises the following steps: (1) mixing Sm2O3 powder, Fe powder and a Ca reducing agent, and carrying out reduction reaction to obtain samarium-iron alloy; (2) mixing and crushing the samarium-iron alloy, mixing the crushed samarium-iron alloy with a dispersant and a passivation solution, carrying out ball milling, separating, and drying to obtain samarium-iron alloy powder; (3) nitriding the samarium-iron alloy powder to obtain samarium-iron-nitrogen powder; wherein the dispersing agent is selected from at least one of alkali metal phosphates; the passivation solution comprises chromium chloride, nitric acid, sulfuric acid and colloidal silicon dioxide. The samarium-iron-nitrogen powder prepared through the method has good magnetic performance.

The invention discloses a tungsten-nickel-iron alloy strength and toughness dual-objective optimization method and system based on machine learning, and the method comprises the following steps: obtaining original data of the components, sintering process, processing process, heat treatment process, strength and toughness of a tungsten-nickel-iron alloy, and carrying out the integration and summarization, so as to obtain an initial data set; preprocessing the initial data set to obtain a processed data set; constructing a plurality of candidate models based on a machine learning algorithm, screening the plurality of candidate models, and training the screened optimal candidate model by using the processed data set to obtain a prediction model; performing strength and toughness prediction on the target tungsten-nickel-iron alloy by using the prediction model to obtain a prediction result; and on the basis of the prediction result, candidate alloys meeting the application requirements are screened out, a dual-objective optimization framework is constructed by using a Pareto optimal criterion to optimize the candidate alloys, and the alloy with the strength and toughness cooperatively optimized is obtained.

The present invention pertains to the fields of materials engineering and nanotechnology. More specifically, the invention discloses the use of an iron alloy comprising a mass quantity of a niobium species as a vehicle component material and a method for adjusting the mechanical properties of a metallic material comprising the incorporation of a niobium species. The products comprising use of the inventive iron alloy exhibit remarkable properties, such as improved mechanical properties combined with reduced weight, resulting in an exponential performance gain. In one embodiment, the alloy used in the invention is called Steeron, because it has steel characteristics while being a cast iron.

The invention provides a method for preparing high-purity titanium from ferrotitanium complex ore, and relates to the technical field of nonferrous metallurgy. The method comprises the following preparation steps: calculating and adding a carbonaceous reducing agent according to the components of the ferrotitanium complex ore and a specific principle, mixing and pelletizing, and reducing to generate a Fe (alloy)-TiC-MOx mixture; according to the content of TiC and Fe in the mixture, adding metal iron powder and Fe2O3 or iron ore concentrate according to a certain stoichiometric ratio, mixing, pelletizing, and reducing to obtain a titanium-iron alloy; and the obtained ferrotitanium alloy serves as a soluble anode, and high-purity titanium is prepared through electrolysis in halide molten salt containing low-valence titanium salt. According to the method, the reaction characteristic of iron and iron oxide with TiC at high temperature is utilized, the ferrotitanium alloy is generated from the ferrotitanium complex ore to serve as the soluble anode, then the high-purity titanium is prepared through molten salt electrolysis, the adverse effects of component deviation and anode precipitates existing in the soluble anode containing the titanium compound are avoided, and meanwhile casting forming is easy, and the method is more suitable for industrialization.

The invention belongs to the technical field of material preparation, and discloses a preparation method of an alloy film loaded noble metal electrode for alkaline hydrogen evolution, and the preparation method comprises the following steps: firstly growing a nickel-iron alloy film on foamed nickel through constant-current deposition, then dipping in a ruthenium trichloride aqueous solution, reducing trivalent ruthenium ions into metal ruthenium under the action of the foamed nickel, and finally obtaining the metal electrode loaded with noble metal. The sample is anchored on the alloy film in the form of ruthenium nano-particle clusters, and the sample has ultralow ruthenium loading capacity. The obtained alloy film is smooth and uniform, uniform distribution of active sites is facilitated, electron transfer is accelerated, meanwhile, the ruthenium nanocluster with the proper size is loaded by controlling the dipping condition, the hydrogen evolution reaction is promoted, the hydrogen adsorption process is optimized through the synergistic effect between the ruthenium nanocluster and the nickel-iron alloy, and the hydrogen adsorption efficiency is improved. And the hydrogen evolution reaction kinetics of the material is improved. The obtained self-supporting catalyst has excellent performance which is superior to that of a Pt / C catalyst, still keeps excellent stability under industrial-grade large current density, and has a wide application prospect.

The invention discloses a nickel-iron alloy precipitation type perovskite catalytic material with excellent ammonia decomposition activity and solid oxide fuel cell performance as well as a preparation method and an application of the nickel-iron alloy precipitation type perovskite catalytic material. The general formula of the catalytic material is La < 0.7 > Sr < 0.2 > Fe < 1-x > Ni < x > O < 3-delta > (0 lt, x is smaller than or equal to 0.3), uniform precipitation of Ni-Fe nano-alloy particles is promoted under a high-temperature condition through B-site nickel doping and A-site defect regulation, ammonia decomposition activity is remarkably improved, and electron-ion mixed conductivity of the material is enhanced. A stable three-dimensional polymer network structure is constructed through batch feeding and a citric acid-sol-gel method, the ammonia decomposition rate of the obtained catalytic material at 600-800 DEG C is close to the equilibrium conversion rate, the power density of a fuel cell is remarkably improved, and the problem that a traditional Ni-based anode is prone to sintering and agglomeration at high temperature is effectively solved. The material is compatible with a plurality of electrolyte systems such as YSZ, GDC and SDC, and is suitable for application scenarios such as a plurality of fuel cell electrodes.

The invention discloses a nickel-iron alloy dissolving method which comprises the following steps: feeding a copper sulfate solution into a mixed feed liquid containing a first nickel-iron alloy and copper sulfate, carrying out primary replacement reaction to obtain copper-containing slag and a reaction liquid, maintaining c (Fe < 2 + >) / c (Cu < 2 + >) in the reaction liquid to be 50-90, and overflowing to obtain a nickel-iron-copper solution; wherein c (Fe < 2 + >) and c (Cu < 2 + >) are mass concentrations of Fe < 2 + > and Cu < 2 + > respectively, and the unit is g / L; and carrying out secondary replacement reaction on the nickel-iron-copper solution and a second nickel-iron alloy until the concentration of Cu < 2 + > in a liquid phase is lower than 5ppm, and carrying out solid-liquid separation to obtain a nickel-iron solution product and second copper-containing slag. According to the dissolving method of the ferro-nickel alloy, the recovery process of ferro-nickel in the ferro-nickel alloy can be simplified, the quality of the ferro-nickel solution is improved, the gas production phenomenon caused by acid dissolution is avoided, and the safety is higher.

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 a preparation method of a weather-resistant steel plate for a rare earth La photovoltaic support, and belongs to the technical field of weather-resistant steel. The problem that traditional weathering resistant steel lacks price advantage in market competition with hot-dip galvanized steel due to high alloy content and high initial cost is solved. According to the invention, chemical component design is optimized, a rare earth element La is introduced, a Cu-La-Cr ternary corrosion-resistant system is constructed, meanwhile, specific smelting, refining, continuous casting and hot continuous rolling processes are adopted, and key parameters of each step are strictly controlled; according to the method, the economical efficiency and the high performance of the steel for the photovoltaic support are both considered through pre-desulfurization treatment, adding components, adding time and adding amount of the lanthanum-iron alloy, the temperature system of hot continuous rolling, the controlled cooling process and the like. The preparation method has the characteristics of being low in cost, simple in process and high in operability, and the weather resistance and the mechanical property of the steel plate are not reduced while the alloy cost can be remarkably reduced, so that the requirements of low cost, high corrosion resistance and high strength of weather-resistant steel in the photovoltaic field of C1 and C2 low-corrosion areas in the northwest are met.

The present invention discloses a method for separating nickel and iron from a nickel-iron alloy by chlorination roasting: (1) placing the nickel-iron alloy in a roasting furnace; (2) introducing a gaseous chlorinating agent into the roasting furnace for staged roasting to obtain roasting slag and a roasting gas phase; wherein the gaseous chlorinating agent is a mixture of chlorine and gaseous ferric chloride; and (3) condensing the roasting gas phase obtained in step (2) in stages to obtain solid ferric chloride and liquid silicon tetrachloride, respectively. The present invention controls the composition of the chlorinating agent during the chlorination roasting process to achieve selective and directional volatilization of iron into the gas phase while preventing nickel from being chlorinated. Thus, nickel and iron in the nickel-iron alloy can be separated in a single step, and the process flow is short.

The invention relates to the technical field of wastewater treatment and resource recovery, and discloses an organophosphorus degradation and recovery system based on double-cathode electro-Fenton reaction, comprising: an electrolytic tank for accommodating organophosphorus wastewater to be treated; the anode is arranged in the electrolytic tank and is electrically connected with an anode of a power supply; the oxidizing agent generating cathode is arranged in the electrolytic tank and is used for generating hydrogen peroxide in situ under a power-on condition; the metal reduction cathode is arranged in the electrolytic tank and is used for adsorbing and reducing ferric ions; the metal source is composed of zero-valent iron or iron alloy, is not directly and electrically connected with the power source, and is arranged in an electric field acting area established by the anode and the at least one cathode. Through the design of inductive slow-release iron supply and double-cathode collaborative circulation, a series of problems of uncontrollable iron ion release, high iron sludge yield, low catalyst utilization efficiency, difficulty in resource recovery and the like in the traditional electro-Fenton technology are effectively solved.

The invention belongs to the field of mineral smelting, and particularly relates to a selective carbonization roasting and niobium / titanium separation method for niobium-titanium-iron paragenic ore, which comprises the following steps of: carbonizing the niobium-titanium-iron paragenic ore and a carbon material in a weight ratio of 100: (2-10) in activated gas at the temperature T, niobium in the niobium-titanium-iron paragenic ore is selectively converted into niobium carbide, a niobium-iron alloy is formed, then the carbonized product is subjected to magnetic separation treatment, and a niobium-iron alloy magnetic separation material containing niobium carbide and titanium-enriched magnetic separation tailings are obtained; the activation gas is a hydrogen-containing gas; and the temperature T is 1000 to 1300 DEG C. By means of the method, selective carbonization of niobium in the mineral can be achieved, and selective separation of niobium and titanium can be achieved.

The invention provides a separation and recovery method of a nickel-iron alloy. The separation and recovery method comprises the following steps that S1, the ferro-nickel alloy material is subjected to atmospheric pressure leaching, and leaching residues and leaching liquid are obtained; s2, mixing the leachate in the S1, phosphoric acid and a first pH regulator, regulating the pH value to 1.6-1.8, and carrying out first impurity removal treatment to obtain iron phosphate and an impurity-removed solution; and S3, adjusting the pH value of the liquid subjected to impurity removal by adopting a second pH regulator until the pH value is 2.1-2.3, and carrying out second impurity removal treatment to obtain precipitation slag and a nickel-containing solution. According to the method, under the condition that impurities in the leachate are removed through phosphoric acid, the pH value of the leachate is adjusted and controlled in two stages, so that few main metal is included in impurity precipitates, the filtering performance is good, meanwhile, the loss of the main metal in the impurity removal process is reduced, and the recovery rate of nickel in the nickel-iron alloy material is increased.

The invention discloses a method for recovering manganese from manganese-iron alloy waste residues, which comprises the following steps: crushing the manganese-iron alloy waste residues, drying, uniformly mixing the dried manganese-iron alloy waste residues with a binary flux according to a mass ratio of 1: (1.8-2), completely roasting, cooling to room temperature, and taking out a roasted slag sample, thereby obtaining the manganese from the manganese-iron alloy waste residues. Adding deionized water to leach manganese sulfate at room temperature, filtering and separating to obtain a manganese sulfate crude solution; and adding metal manganese powder, ammonium sulfide and a flocculating agent into the manganese sulfate crude liquid, further removing impurities, adjusting the pH value, adding citric acid, and filtering and separating to obtain a manganese sulfate purified liquid. The recovery rate of manganese can reach 99.1% or above, energy consumption is low, operation is easy, impurity removal is thorough, and the obtained product is high in quality.

The invention provides a smelting method of steel for a non-quenched and tempered crankshaft, the steel for the non-quenched and tempered crankshaft comprises the following chemical components in percentage by weight: 0.25%-0.50% of C, 0.20%-0.80% of Si, 0.80%-1.80% of Mn, 0.020%-0.060% of S, 0.015%-0.060% of Al, 50-200ppm of N, less than or equal to 0.020% of P and the balance of Fe, inevitable impurities and one or more of V, Ti and Nb, and the total content of V, Ti and Nb is less than or equal to 0.20%. The smelting method comprises the steps of converter smelting, LF refining, RH vacuum degassing and continuous casting. Wherein 1-3 kg / t of silicon ball deoxidizer, 2-4 kg / t of lime and 4-8 kg / t of wollastonite are added during converter smelting and tapping; in the LF refining process, a siliceous deoxidizer with the total amount of 0.5-1.5 kg / t steel is added in batches for diffusion deoxidation during heating, and meanwhile, lime with the total amount of 2-6 kg / t steel and wollastonite with the total amount of 4-9 kg / t steel are added; and in the later stage of LF refining, sulfur-iron alloy is added, Al alloying is conducted in the RH vacuum degassing process, and calcium wires are fed after vacuum breaking. The casting continuity of the steel for the non-quenched and tempered crankshaft can be improved, and the content of inclusions can be controlled.

The invention discloses a preparation method of a Ti-Zr-Al alloy, which comprises the following steps: determining the ratio value of each alloy element according to the target component range of the Ti-Zr-Al alloy, and selecting sponge titanium, sponge zirconium, a titanium-iron alloy, titanium dioxide and aluminum shots as raw materials; weighing the titanium sponge and the intermediate alloy, and uniformly mixing the titanium sponge and the alloy raw material to form a to-be-pressed raw material; pressing into electrode blocks, and stacking and welding the electrode blocks into a consumable electrode; and the consumable electrode is smelted through a vacuum consumable electric arc furnace, so that the Ti-Zr-Al alloy is prepared. By controlling the chemical components of all the elements in the titanium alloy, the composition proportion of the titanium alloy meets the batching requirement of the titanium alloy cast ingot, the content of impurity elements in the Ti-Zr-Al titanium alloy cast ingot is effectively controlled, and the quality of the titanium alloy cast ingot is guaranteed.

The invention relates to a method for preparing a high-strength and high-conductivity powder metallurgy copper-iron alloy from copper-coated iron powder, and belongs to the technical field of electrochemistry and powder metallurgy materials. S2, preparing a copper source solution; s3, mixing and replacing powder and liquid; s4, performing two-stage reduction; s5, powder raw material mixing; s6, pressing and forming the raw materials; s7, sintering and densifying; s8, deformation processing treatment; and S9, high-temperature heat treatment. According to the method for preparing the high-strength and high-conductivity powder metallurgy copper-iron alloy through the copper-coated iron powder, the prepared copper-coated iron composite powder is uniform in coating layer structure and good in compactness, and compared with a replacement copper plating method, a large number of loose copper block heterogeneous distribution does not occur on the surface; and secondly, the prepared copper-iron alloy billet is low in oxygen content, high in sintering density, uniform in component, free of segregation, small in grain size, excellent in processability, few in residual solid solution iron atoms in copper, high in strength and high in conductivity, and has important application prospects in key components in the fields of electronic information, aerospace, electromagnetic shielding and the like.

The invention belongs to the technical field of magnetic materials, and particularly relates to a preparation method of anisotropic samarium-iron-nitrogen permanent magnet powder. The preparation method of the anisotropic samarium-iron-nitrogen permanent magnet powder comprises the following steps that (1) a single-phase Sm2Fe17 alloy cast ingot is sequentially subjected to coarse crushing and jet mill smashing, and samarium-iron alloy powder is obtained; (2) nitriding the samarium-iron alloy powder in a plurality of temperature sections; (3) grinding the samarium-iron alloy powder subjected to nitriding treatment by using a sand mill; the temperature of the nitriding treatment is 350-520 DEG C, the nitriding treatment is divided into 2-5 temperature sections, and the temperature is increased in sequence. By regulating and controlling the oxygen content, the particle size and nitriding treatment process parameters of the samarium-iron alloy powder before nitriding treatment, full nitriding of the samarium-iron alloy powder is achieved, and the samarium-iron-nitrogen permanent magnet powder with good magnetic performance is obtained.

The invention discloses a method for improving the toughness performance of low-alloy high-strength steel by adding rare earth cerium-iron alloy and application of the method, and belongs to the technical field of steel rolling and product development. According to the method, narrow window control is conducted on converter steelmaking, LF refining and RH vacuum treatment in an existing wide and thick plate low-alloy high-strength toughness steel production technological process, a cerium-iron alloy is added after alloying in the RH vacuum treatment process is finished and circulated, temperature measurement and oxygen determination are conducted before the cerium-iron alloy is added, and the active oxygen is smaller than or equal to 3 ppm. The method is applied to an RH vacuum treatment step of industrial production of wide and thick plate Q690E steel and comprises the following steps: adding a titanium-iron alloy and a ferroboron alloy in sequence for alloying, circulating after alloying is finished, and adding a cerium-iron alloy; and carrying out soft blowing after the RH vacuum treatment is finished. After the rare earth cerium-iron alloy is added, the average size of low-alloy high-strength steel inclusions is remarkably reduced, the average grain size is greatly small, the average width of a martensite lath bundle is narrowed by less than 200nm, and the toughness performance is remarkably improved.

The invention discloses a preparation method of a nickel-iron alloy composite electrode suitable for electrocatalytic cracking of alkaline seawater and a product. The preparation method comprises the steps of surface treatment of a nickel-iron alloy sheet and preparation of a boronized nickel-iron alloy sheet composite electrode. According to the method, the marketed NiFe alloy sheet is directly subjected to thermal boronizing treatment and is directly subjected to electrochemical oxidation to prepare the multi-chromatography oxygen electrode, and various requirements of an anode material for seawater decomposition can be met. The prepared multi-layer oxygen electrode is mainly composed of a surface oxide layer, an alloy middle layer and an alloy substrate layer. The NiFeB alloy layer on the surface plays a role of a catalytic active layer, the NiFeB alloy layer in the middle plays a role of a corrosion-resistant layer, the NiFe alloy layer on the substrate plays a role of supporting, and the electrode material is efficiently supported by multiple layers together, so that the electrode material has a rapid electron transfer process, and the electrode material can show relatively high catalytic activity. The electrode material is cheap in raw material source and simple in preparation process, and has a relatively strong commercial application prospect.

Disclosed is an alloyed hot-dip galvanized steel sheet in which 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 10-12% by mass, and the surface phase structural composition of the alloyed hot-dip galvanized layer contains a polygonal zinc-iron alloy phase, the ratio R of the length to the width of the polygonal zinc-iron alloy phase is not less than 1 and not more than Rlt; 2. The alloyed hot-dip galvanized steel plate is good in deep drawability. 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, the alloy phase structure of a steel plate coating is controlled by controlling the air-fuel ratio in the preheating stage and the dew point DP in the soaking stage in the continuous annealing step and the alloying temperature in the alloying step, and therefore the deep drawing performance of the steel plate is improved.

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 relates to a porous nickel-iron alloy integrated electrode and a preparation method and application thereof, and belongs to the technical field of electrochemistry. The preparation method comprises the following steps: carrying out cleaning pretreatment on a stainless steel mesh substrate; then electro-deposition is carried out in a solution containing ferric salt and nickel salt, and a nickel-iron alloy layer is formed; carrying out secondary electro-deposition in a solution containing zinc salt, and carrying out high-temperature calcination treatment to obtain a nickel-iron-zinc alloy; and finally, the zinc component is removed through selective corrosion of an alkaline solution, and the nickel-iron alloy integrated electrode with the porous structure is formed on the stainless steel mesh. The method is controllable in process, and a porous structure which is high in specific surface area and beneficial to mass transfer is effectively constructed through step-by-step electro-deposition, calcination and corrosion treatment. The obtained integrated electrode can be directly used as an alkaline water electrolysis oxygen evolution reaction (OER) anode, shows high electrocatalytic activity and stability, and is suitable for the fields of water electrolysis hydrogen production and the like.

The invention discloses a lightweight high-strength driving unit shell composite iron alloy casting preparation method, relates to the technical field of composite iron alloy casting, and aims to solve the technical problem of low static standing degassing efficiency, a bottom die and a top die are included, and molten metal enters a cavity formed by the bottom die and the top die to produce a formed casting. Bubbles with the density far smaller than that of molten metal can be gathered towards the center shaft through centrifugal force generated by the spiral flow deflectors, the first cutting blocks are arranged on the outer sides of the arc-shaped plates at the center shafts of the spiral flow deflectors, the gathered bubbles can be cut and crushed for the first time, and the bubble content is preliminarily reduced; the second cutting block at the top of the trapezoidal plate can conduct secondary cutting on tiny bubbles remaining in molten metal, the double degassing cutting structure greatly improves the degassing efficiency, the bubbles in the molten metal are effectively removed, the impact resistance and deformation resistance of the shell are enhanced, key guarantee is provided for the high-strength performance of the shell, and the service life of the shell is prolonged. The problem that static standing degassing efficiency is low is solved.

The invention discloses a low-cost and high-strength two-phase titanium alloy, which contains Ti and inevitable impurity elements, and also contains the following chemical elements in percentage by mass: 5.0%-7.0% of Al, 3.6%-4.5% of V, 0.4%-1.6% of Cr, 0.5%-1.3% of Fe and 0.06%-0.20% of O. The invention further discloses a manufacturing method of the two-phase titanium alloy. The manufacturing method comprises the steps that material preparation is conducted, wherein raw materials comprise sponge titanium, ferrochrome, TC4 titanium alloy return scraps and metal aluminum; smelting cast ingots; carrying out homogenization treatment; one-fire multi-pass rolling is adopted, the rolling speed is firstly slow and then fast during rough rolling, the rolling speed is firstly fast and then slow during finish rolling, online reversing is carried out between rough rolling and finish rolling, and air cooling is carried out after rolling.

The invention discloses a method for replacing a calcium wire feeding process with rare earth treatment for aluminum deoxidized steel, which comprises the following steps of: 1, controlling a narrow window process in a smelting process to meet the cleanliness condition of molten steel before rare earth is added, optimizing and executing the following processes to realize better molten steel cleanliness in the steel, meanwhile, the control range of the content of acid-soluble aluminum [Al] in the steel is 0.020-0.050%; and 2, adding rare earth, namely adding a certain amount of rare earth cerium-iron alloy at the last stage after LF refining deoxidation alloying according to the content of acid-soluble aluminum [Al] in different ranges in the steel. The invention aims to effectively improve the production time sequence of the smelting process, further realize the control effect of high-cleanliness molten steel through the deep purification effect of strong deoxidation and desulfurization of high-reducibility lanthanum-cerium rare earth on the molten steel, simultaneously realize the purpose of reducing the manufacturing cost, and eliminate the problem of smoking caused by a calcium treatment process.