113 results about "Fe element" patented technology

The invention relates to the field of titanium metallurgy, in particular to a vacuum consumable smelting method for a titanium alloy cast ingot and the titanium alloy cast ingot obtained through the method. According to the vacuum consumable smelting method for the titanium alloy cast ingot, based on the VAR titanium alloy smelting technology, an electrode block partition differentiation batching mode is adopted for the problem of component uniformity of the Fe element and the O element in the titanium alloy cast ingot, the segregation degree of the Fe element and the O element in the titanium alloy cast ingot is effectively controlled, and the quality of the titanium alloy cast ingot is improved. And the target requirement of the high-homogeneity cast ingot on the uniformity of Fe and O element components is met. The method is suitable for smelting different specifications of TC4 and TC4ELI titanium alloy ingots, the metallurgical quality of the ingots is improved, high practicability and generalization performance are achieved, a raw material guarantee is provided for the downstream material forming machining procedure, application and popularization of TC4 and TC4ELI titanium alloy products in the aviation and medical field are effectively promoted, and the method is suitable for popularization and application of the TC4 and TC4ELI titanium alloy products in the aviation and medical field. Therefore, certain economic benefits are created for enterprises.

The invention relates to the technical field of preparation of high-entropy alloy coatings, in particular to a preparation method of a high-entropy alloy coating, which comprises the following steps: by taking a Q235 carbon steel plate as a substrate, carrying out cladding operation on a high-entropy alloy stranded welding wire only containing four components of Al, Co, Cr and Ni through laser cladding; wherein the AlCoCrFeNi high-entropy alloy coating with different Fe proportions is prepared by changing the wire feeding speed of the laser cladding. According to the method, the proportion of the Fe element of the substrate in the high-entropy alloy coating can be controlled by changing the wire feeding speed of laser cladding, the components of the coating are regulated and controlled, the high-entropy alloy coating with different mechanical properties and corrosion resistance can be prepared, the requirements of different application scenes are met, the laser fuse cladding method is adopted, and the production cost is reduced. The method has the advantages of high efficiency, accuracy and automatic operation, and avoids the problem of component deviation of the high-entropy alloy coating caused by the dilution rate.

The invention discloses a high-temperature-resistant austenite heat-resistant casting alloy material and an application method thereof, and belongs to the technical field of austenite heat-resistant casting alloy materials. The alloy material comprises C, Si, Mn, Cr, Al, Nb, Ti, Zr, N, Mo, W, Y, Ni and Fe elements with specific mass percentage content. Wherein the mass percentage contents of the C, Cr, Al and Ti elements meet the condition that the value of f1 obtained by the calculation model 1 meets the condition that f1% is larger than or equal to 2%, and f1% represents the volume percentage content of an M23C6 precipitated phase of the alloy material at the application temperature of 1100 DEG C or above. The alloy material obtained by the invention has remarkable high-temperature creep resistance in an extreme high-temperature environment, has a stable and compact oxidation film and reinforced carbide, and can keep excellent structural stability and high-temperature mechanical properties under a long-term service condition.

The invention provides an aluminum alloy and a preparation method thereof, and the aluminum alloy comprises the following elements in percentage by mass: 0.30-0.50 wt.% of Si, 0.30-0.50 wt.% of Fe, 0.30-0.50 wt.% of Cu, 0.30-0.50 wt.% of Mn, 0.30-0.50 wt.% of Mg, 0.30-0.50 wt.% of Zn, 0.30 0.45 wt.% to 0.65 wt.% of Fe; 0.40 wt.% to 0.80 wt.% of Cu; mn: 1.25 wt.% to 1.35 wt.%; less than or equal to 0.05 wt% of Mg and less than or equal to 0.10 wt% of %, 0.02 wt.% to 0.05 wt.% of Ti; other single impurities: less than or equal to 0.05 wt.%; the total of other impurities is less than or equal to 0.15 wt.%; and Al: the balance. According to the aluminum alloy and the preparation method thereof, the content of high-strength elements in the aluminum alloy is increased, the content of Mn elements and the content of Fe elements are increased, meanwhile, the Si element is added and matched with the Fe element, the strength and hardness of the aluminum alloy can be effectively improved, and especially the remarkable effect is achieved after cold machining such as rolling; and meanwhile, it is guaranteed that the aluminum alloy has good ductility, the tensile strength of the aluminum alloy is larger than 150 MPa, the ductility of the aluminum alloy is lower than 17%, and the aluminum alloy has good mechanical performance.

The invention provides a 5G50 aluminum alloy plate strip for anodic oxidation and a preparation method of the 5G50 aluminum alloy plate strip. The 5G50 aluminum alloy plate strip for anodic oxidation comprises the following elements in percentage by mass: 0.01%-0.10% of Si element, 0.04%-0.15% of Fe element, 3.0%-4.0% of Mg element, 0.2%-1.2% of Mn element, less than or equal to 0.02% of inevitable impurity element in total content, less than 0.05 wt% of single impurity element and the balance of Al. Wherein after the aluminum alloy plate strip is subjected to anodic oxidation treatment, the surface of the aluminum material has no heterochromatic stripe defect, and the chromatic aberration E is less than 0.15. The 5G50 aluminum alloy plate strip for anodic oxidation can give consideration to both high surface quality and excellent mechanical performance, is widely applied to 3C consumer electronics, and can achieve the practical effects of falling resistance, light weight and attractive appearance of the product.

The present invention discloses a laser additive manufacturing titanium-steel multi-material component, its equipment and method for improving interface bonding and forming performance by suppressing element diffusion through an intermediate layer. The laser additive manufacturing titanium-steel multi-material component includes a titanium alloy layer, an intermediate layer, and a stainless steel layer. The intermediate layer includes a single-element metal Ce layer and a single-element metal Cr layer; the titanium alloy layer, the single-element metal Ce layer, the single-element metal Cr layer, and the stainless steel layer are all sequentially deposited by a laser directed energy deposition process. It can be seen that, for the intermediate layer of the present invention, by designing the single-element metal Ce layer and the single-element metal Cr layer, the diffusion of Ti element in the titanium alloy layer and Fe element in the stainless steel layer is blocked through the mutual solubility characteristics of Ce and Cr, and good metallurgical bonding between different materials is achieved, solving the problems such as interface cracking and holes caused by brittle intermetallic compounds when titanium alloy and stainless steel are directly connected.

The invention relates to a net-shaped heterostructure cast high-entropy alloy with good mechanical properties and preparation and application thereof, and aims to solve the technical problems of high production cost and long period caused by the dependence of introduction of high-cost elements or a complex process in the conventional high-entropy alloy. The CrFexNiAl0. 28Ti0. 12 as-cast high-entropy alloy is prepared by taking CrFeNiAl0. 28 as a matrix component, optimizing the alloy design by introducing a Ti element and adjusting the content of an Fe element and combining a vacuum arc melting and suction casting process. According to the method, Ti is reasonably added into the CrFeNiAl0.28 series alloy, the content of Fe is regulated and controlled to optimize the mechanical property of the CrFeNiAl0.28 series alloy, meanwhile, adverse effects caused by the Fe are overcome or balanced, and the net-shaped bionic heterostructure as-cast high-entropy alloy which is high in strength, good in plasticity and low in cost is developed.

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 belongs to the technical field of aluminum alloy die-casting, and particularly relates to a high-strength and high-toughness heat-treatment-free die-casting aluminum alloy, a structural part and a preparation method. According to the high-strength and high-toughness heat-treatment-free die-casting aluminum alloy provided by the invention, the limitation that a traditional heat-treatment-free die-casting aluminum alloy is low in Fe element tolerance and the limitation that a traditional high-Fe-content aluminum alloy is insufficient in toughness are broken through by designing an element composition system and multi-strategy cooperative regulation and control of the high-strength and high-toughness heat-treatment-free die-casting aluminum alloy. And by adopting a Ca-Sr composite modification strategy and a Cr-Mn cooperative regulation strategy, the Fe content tolerance is expanded to 0.5 wt%-1.6 wt%, and meanwhile, the recycling rate of waste materials of the die-casting aluminum alloy is high. Based on the synergistic strengthening effect of all elements in the components, the tensile strength and ductility of the high-Fe-content die-casting aluminum alloy can be synergistically improved without heat treatment, the heat-treatment-free die-casting aluminum alloy with high tensile strength and high toughness is obtained, and the heat-treatment-free die-casting aluminum alloy is suitable for preparing deep-cavity shell type, multi-fin heat dissipation type and other complex structural parts.

The invention relates to low-alloy structural steel, in particular to easy-to-bend 460MPa steel for a 20mm coal mine hydraulic support and a preparation method of the easy-to-bend 460MPa steel, and the steel is prepared from the following raw materials in percentage by mass: 0.16-0.18% of C, 0.20-0.30% of Si, 1.35-1.5% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.020-0.025% of Nb and the balance of Fe and inevitable elements. According to the easy-to-bend 460MPa steel for the 20mm coal mine hydraulic support, only a small amount of Si, Mn, Al and Nb alloy is added in the component design, other precious alloy does not need to be added, heat treatment is controlled through a rolling process, the easy-to-bend steel for the 20mm 460MPa coal mine hydraulic support is manufactured, when D is equal to 1a, the easy-to-bend steel does not crack when being bent, and the tensile strength of the easy-to-bend 460MPa steel is higher than that of the 20mm 460MPa coal mine hydraulic support. And the performance of the low-alloy high-strength structural steel is superior to that of 20mm low-alloy high-strength structural steel specified by GB / T1591-2018 Low-alloy high-strength structural steel.

An ultra-low-temperature steel for hydrogen energy storage and transportation equipment and a preparation process thereof, including chemical elements with mass percentages of C: 0.06-0.1%, Ni: 6.5-10.5%, Mn: 1.0-1.5%, Cr: 0.8-1.5%, Si: 0.3-0.5%, Al: 0.3-0.5%, and the rest being Fe elements; on the basis of conventional Ni-based ultra-low-temperature steel components, the ratio is adjusted, the components are optimized, the grain refinement and dynamic recrystallization are promoted, and the low-temperature toughness of the steel is improved; the 'austenite + forging process' is applied to densify and refine the parent phase austenite (fcc phase) grains, and then through solid phase transformation, the bcc phase (ferrite or martensite) is formed from the refined parent phase; the grain ultra-refinement can significantly improve the low-temperature toughness of the steel, the grain ultra-refinement treatment increases the grain boundary, effectively hinders the crack propagation, reduces the ductile-brittle transition temperature, and significantly improves the low-temperature toughness.

This invention provides a 5-series aluminum alloy sheet and its preparation method, relating to the field of aluminum alloy technology. The preparation method includes: S1, mixing the metal raw materials of the 5-series aluminum alloy sheet according to a specified ratio and sequentially melting and casting to obtain an aluminum alloy ingot; S2, sequentially subjecting the aluminum alloy ingot to homogenization treatment, hot rolling treatment, first cold rolling treatment, intermediate annealing, and second cold rolling treatment to obtain a cold-rolled sheet; S3, sequentially subjecting the cold-rolled sheet to final annealing, cooling treatment, and straightening treatment to obtain the 5-series aluminum alloy sheet; wherein the Fe element content in the 5-series aluminum alloy sheet is not less than 0.25% by mass, the final annealing temperature is 520~550℃, the final annealing holding time is 10~60s, the final annealing heating rate is 5~15℃ / s, and the cooling rate of the cooling treatment is 8~16℃ / s. The prepared 5-series aluminum alloy sheet exhibits excellent mechanical properties, formability, and surface quality.

The present invention belongs to the technical field of ribbed steel production, and particularly relates to an HRB600E high-strength ribbed steel and a production method thereof. For the HRB600E high-strength ribbed steel, by mass percentage, the composition of the continuous casting billet is: C: 0.25 - 0.28%, Si: 0.45 - 0.60%, Mn: 1.35 - 1.55%, Nb: 0.005 - 0.010%, Cr: 0.15 - 0.25%, V: 0.10 - 0.11%, N: 0.0230 - 0.0280%, P ≤ 0.035%, S ≤ 0.035%, and the balance is Fe element and inevitable impurities; the ratio of yield strength to tensile strength of the ribbed steel is ≥ 1.27. For the production method of the HRB600E high-strength ribbed steel, the rolling temperature of the finishing mill is in the austenite non-recrystallization temperature range of the HRB600E high-strength ribbed steel; the cumulative deformation rate of the intermediate billet in the finishing mill is controlled at 20 - 40%. This method aims to improve the ratio of yield strength to tensile strength of the ribbed steel by adjusting the size ratio of the rolled material grains in the rolling direction and the direction perpendicular to the rolling direction.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The application provides a copper alloy, a preparation method thereof and an elastic electronic component, and relates to the technical field of copper alloys.The copper alloy comprises the following elements in percentage by mass: the content of Ti element is 2.70-4.20%, the content of Y element is 0.010-0.030%, the content of La element is 0.010-0.030%, the content of B element is 0.010-0.020%, the total content of unavoidable impurities is less than or equal to 0.01%, and the balance is Cu element and M element; wherein, the M element is Fe element or P element, when the M element is Fe element, the content of Fe element is 0.28-0.45%, and when the M element is P element, the content of P element is 0.05-0.15%. The copper alloy has excellent tensile strength, hardness, elastic modulus and conductivity.

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The invention relates to a 1200MPa-grade low-cost nickel-based alloy for a second-generation high-temperature superconducting baseband and a preparation method of the 1200MPa-grade low-cost nickel-based alloy, and belongs to the technical field of materials. The nickel-based alloy comprises the following chemical components in percentage by weight: 15.0 to 17.0 percent of Cr, 10.0 to 30.0 percent of W, 2.0 to 10.0 percent of Fe, Clt and the balance of Ni. 0.005%, Plt; 0.005%, Slt; 0.002%, Olt; 0.002%, Nlt; 0.002%, and the balance being nickel. The Ni-Cr-W-Fe quaternary alloy component design thought is innovatively put forward, the contents of the W element and the Fe element are optimally designed, the follow-up optimized homogenization treatment, the forging process, the hot rolling process, the solution treatment and the cold machining process are matched, and after the nickel-based alloy is annealed for 5 min at the temperature of 900 DEG C, the nickel-based alloy with the yield strength of 1050 MPa or above and the tensile strength of 300 MPa or above can be obtained. The nickel-based alloy with the tensile strength of 1200 MPa or above and the ductility of 25% or above meets the requirement that the tensile strength of a second-generation high-temperature superconducting high-performance metal-based strip reaches 1200 MPa or above.

The invention discloses a TiFe-based hydrogen storage alloy and a preparation method thereof, and belongs to the field of metal hydrogen storage materials. The general chemical formula of the TiFe-based hydrogen storage alloy is TiaNdbZrcFedNieMnf, and the atomic percent of each element is as follows: 46 to 53 at% of Ti element, 0.1 to 1.5 at% of Nd element, 1 to 6.5 at% of Zr element, 27 to 40 at% of Fe element, 2 to 10 at% of Ni element and 4.5 to 12 at% of Mn element; wherein Ti, Nd and Zr are first metal elements, Fe, Ni and Mn are second metal elements, and the ratio of the total atomic percent of the first metal elements to the total atomic percent of the second metal elements is 1.05-1.20. The TiFe-based hydrogen storage alloy can be activated at room temperature, has proper hydrogen absorption and desorption platform pressure, and keeps high hydrogen storage capacity and high hydrogen absorption and desorption rate at the same time.

Embodiments of the present application provide a martensitic steel and a preparation method therefor, a structural member, and a terminal device. The martensitic steel provided in the embodiments of the present application comprises the Ni element, the Co element, the Mo element, the Nb element, the C element, the Fe element and other trace elements; on the basis of the total mass of the martensitic steel, the mass fraction of the Ni element is 14%-16%, the mass fraction of the Co element is 16%-18%, the mass fraction of the Mo element is 7%-10%, the mass fraction of the Nb element is 0.1%-0.6%, and the mass fraction of the C element is 0.003%-0.1%. On the basis of the element selection of the martensitic steel and the design of the content of each element, the martensitic steel can be prepared by means of a powder molding process such as metal injection molding, and the martensitic steel prepared by means of the described process can have high strength, good toughness, and a preset shape.

The application discloses an easy-activation hydrogen storage alloy and a preparation method thereof, and belongs to the technical field of hydrogen storage alloys. The application forms a quaternary hydrogen storage alloy with a chemical formula of Ti x V 40 Mn y Fe z by using cheap and easily-obtained Ti, Mn and Fe elements to partially replace V, wherein x, y and z respectively represent the atomic percentage of Ti, Mn and Fe, 30<=x<=40, 2<=y<=22, 3<=z<=18, and x+y+z=60. The preparation method of the hydrogen storage alloy is to melt 3-5 times under the protection of argon gas by using a vacuum non-consumable arc furnace. The application not only effectively reduces the preparation cost of the hydrogen storage alloy, but also has a simple preparation method, solves the problem of difficult activation of vanadium-based hydrogen storage alloys, and has a wide practical prospect in hydrogen gas purification and hydrogen fuel cells.

This invention provides a method for steel / aluminum butt brazing joints based on grid control, belonging to the field of dissimilar material welding. The method includes: spot welding a steel grid to the back of the area to be welded on a steel plate; applying flux and then clamping the aluminum alloy plate butt-welded to the steel plate; performing brazing using a laser-MIG composite heat source; feeding welding wire into the molten pool and adding an additional cold wire. During welding, the back grid partially dissolves to provide Fe element and utilizes capillary action to promote the spread of molten aluminum to the back side. The cold wire absorbs heat to compensate for the metal on the front side. Together, these two elements create a uniform intermetallic compound layer on the front, sides, and back of the joint, achieving a large back weld width and a full front weld height. Using this method, the joint's positive and negative bending angles both reach 180° without failure, significantly improving the bending performance of the steel / aluminum butt brazing joint.

The application provides an N-type thermoelectric material formed based on TiNiSb and Fe element, and the chemical formula is TiNiFe x Sb, and the value range of x in the chemical formula is 0.4<=x<=0.5. The application provides a preparation method of TiNiFe x Sb material, so that the prepared sample has good stability. TiNiFe x Sb is a non-toxic and environment-friendly material, and the raw material cost is low. Compared with a TiNiSb matrix, the thermal conductivity is significantly reduced, and the electrical performance is obviously improved, so the sample has excellent thermoelectric performance in the whole temperature range. Since the sample is an alloy sample, a stable preparation scheme is the key of the application. Therefore, a method combining high-energy ball milling and high-temperature annealing is adopted. The final test of the sample of the application includes judging whether the sample is a pure phase without impurities by using XRD, testing the electrical conductivity and the Seebeck coefficient by using ZEM, testing the thermal conductivity by using LFA-457, and finally obtaining the thermoelectric performance of the sample.

This invention relates to the field of aluminum alloy materials technology, specifically to a high-performance aluminum alloy die-casting material and its preparation method, comprising the following components by weight percentage: Si: 6.0–10.0 wt.%; Mg: 2.0–3.5 wt.%; Zn: 1.0–1.5 wt.%; Cu: 0.5–0.8 wt.%; Mn: 0.2–0.5 wt.%; RE: 0–1.0 wt.%; Ti: 0.1–0.2 wt.%; Sr: 0.01–0.03 wt.%; the balance being Al and unavoidable impurities, wherein the Fe element in the impurities is ≤0.15 wt.%, the total amount of impurity elements is ≤0.3 wt.%, and RE is a rare earth element. It is prepared through processes such as alloy melt smelting, die casting, and T6 heat treatment. This material possesses excellent die-casting properties and superior mechanical properties, meeting the performance requirements of various automotive parts. Its yield strength is 210–240 MPa; tensile strength is 300–350 MPa; and elongation is 6–10 wt.%.

The application discloses a high-temperature-resistant austenitic heat-resistant cast alloy material and an application method thereof, and belongs to the technical field of austenitic heat-resistant cast alloy materials.The alloy material comprises C, Si, Mn, Cr, Al, Nb, Ti, Zr, N, Mo, W, Y, Ni and Fe elements with specific mass percentage contents; wherein the mass percentage contents of C, Cr, Al and Ti elements satisfy that a value of f1 obtained by a calculation model 1 meets f1% >= 2%, wherein f1% represents the volume percentage content of C6 precipitated phase of the alloy material at an application temperature above 1100 DEG C. 23 The alloy material obtained by the application has significant high-temperature creep resistance in an extremely high-temperature environment, has a stable dense oxide film and strengthened carbide, and can maintain excellent structural stability and high-temperature mechanical properties under long-term service conditions.

The present invention discloses a composite coating for medium- and low-temperature SOFC connectors and its preparation method. The method comprises the following steps: first, mechanically mixing manganese powder, cobalt powder, and iron powder; then, pretreating the substrate surface, cold spraying, and low-temperature oxidation to obtain the composite coating. The Mn and Co in the coating are oxidized to form MnCo2O4, an effective high-temperature oxidation-resistant coating. The Fe element can regulate the thermal expansion coefficient of the composite coating to match that of the YSZ ceramic electrode. The coating exhibits excellent electrical and thermal conductivity, is easy to manufacture, and is low-cost.

The invention provides an aluminum alloy plate and a preparation method thereof. The preparation method comprises the steps that smelting, casting, soaking and heating integrated treatment, hot rolling and cold rolling are sequentially conducted after ingredients of an aluminum alloy plate are prepared, and a cold-rolled coiled material is obtained; the aluminum alloy plate comprises the following components in percentage by mass: 0.6-1.3% of Si element, less than or equal to 0.5% of Fe element, 0.5-1.1% of Cu element, less than or equal to 1.0% of Mn element, 0.6-1.2% of Mg element, less than or equal to 0.25% of Cr element, less than or equal to 0.7% of Zn element, less than or equal to 0.2% of Ti element, less than or equal to 0.2% of Zr element and the balance of Al element. The cold-rolled coiled material is sequentially subjected to solid solution treatment, quenching (multi-stage cooling), straightening and pre-aging, and a first finished coiled material is obtained; and the first finished coiled material is subjected to differential temperature heating artificial aging treatment, and the aluminum alloy plate is obtained. The production efficiency of the preparation method is high, and the comprehensive performance of the obtained aluminum alloy plate is good.

The invention relates to the technical field of aluminum-iron coated steel plates, in particular to an antibacterial aluminum-iron alloying coated steel plate and a manufacturing method and application thereof. The antibacterial aluminum-iron alloying coated steel plate comprises a substrate, a diffusion layer, an Al-Fe phase containing Cu and / or Ag, an Al-Fe-Si phase containing Cu and / or Ag and an Al2O3 oxide film multilayer structure, an aluminum-silicon alloy coating is formed on the surface of the substrate through hot dipping, and then the aluminum-silicon alloy coating is converted into an aluminum-iron alloy coating after alloying annealing and Fe element diffusion; the total thickness of the aluminum-iron alloy coating is 6-45 microns, the thickness of the diffusion layer is 1-10 microns, the thickness of the Al2O3 oxidation film is 0.1-1 micron, the proportion of an Al-Fe-Si phase containing Cu and / or Ag to the sectional area of the aluminum-iron alloy coating is 10%-40%, the rest is the Al-Fe phase containing Cu and / or Ag, and the surface of the aluminum-iron alloy coating is black. The antibacterial rate of the coated steel plate reaches 95% or above.

The application discloses a vacuum die-casting motor rotor casting aluminum alloy and a preparation method thereof. According to mass percentage, the vacuum die-casting motor rotor casting aluminum alloy comprises the following components: 3.0-6.5% of Ni elements, 0.3-1.0% of Fe elements, 0.2-0.4% of Mg elements, 0.02-0.1% of B elements, 0.1-0.6% of Ce elements, and the rest is Al, and the rest is impurity elements; wherein, the content of a single impurity element is less than 0.03%, and the total content of the impurity elements is less than 0.2%.

The invention relates to a denitration catalyst, a preparation method of the denitration catalyst and a method for removing NOX in a gas phase, and discloses a denitration catalyst which contains a titanium oxide and an iron oxide, wherein the molar ratio of the Fe element to the Ti element on the surface of the catalyst is (5-10): 1. The denitration catalyst has the advantages of good low-temperature denitration performance, good sulfur resistance and good operation stability.