83 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 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 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 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 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.

The invention discloses an NF500R alloy used for a nitric acid and hydrofluoric acid mixed solution corrosion working condition. The NF500R alloy is prepared from, by mass, 31.5%-35% of Cr, 11.5%-15% of Fe, 1%-3% of Ti and the balance Ni and inevitable impurity elements. The preparation method of the alloy comprises the following steps: 1, uniformly mixing a nickel block, a NiCr45 intermediate alloy, iron particles and sponge titanium, and smelting to obtain an alloy ingot; 2, cutting the alloy ingot, and carrying out surface treatment to obtain a rolled blank; 3, rolling after solution treatment to obtain a rolled plate; and 4, vacuum annealing treatment. According to the NF500R alloy and the preparation method thereof, on the basis of Ni-Cr alloy, a trace Ti microalloying method is adopted, the solid solution strengthening effect and the intergranular corrosion inhibiting effect are exerted, formation of a stable fine grain structure is promoted by adding high-content Cr, the corrosion resistance and mechanical performance of the alloy are improved by adding Fe, and the NF500R alloy with excellent corrosion resistance and excellent strong plasticity is obtained; the method is suitable for spent fuel treatment.

The application discloses an Al-Mg-Si alloy with good heat resistance and size stability, and the alloy is composed of the following components in percentage by mass: Mg 0.6-1.2%, Mn 0.3-0.5%, Si 0.5-0.9%, Cu 0.1-0.15%, Cr 0.15-0.2%, Zn 0.1-0.2%, Ti 0.10-0.15%, Sc 0.05-0.25%, Hf 0.05-0.25%, Bi 0.6-1.5%, and the balance of Al and inevitable impurity elements. The Al-Mg-Si alloy of some examples of the application can avoid the increase of electron scattering caused by the solid solution of Si and Fe elements in the matrix by adjusting the content of Mg and Si elements, and is beneficial to the improvement of the heat conduction performance of the alloy; the alloy contains Sc and Hf rare earth elements, so that the heat conduction performance and heat resistance of the alloy are improved; a small amount of Bi element is further added, so that the expansion of the alloy at a higher temperature is reduced, and the size stability of the alloy is improved; and the alloy is subjected to a stabilization treatment, so that the microstructure of the alloy is effectively stabilized, and the macroscopic residual stress of the hot extruded profile is obviously reduced.

The invention provides an Al-Fe type motor rotor alloy material and a preparation method thereof, and relates to the technical field of motor rotor materials. The Al-Fe type motor rotor alloy material comprises the following components in percentage by weight: 0.15 to 0.4 percent of Fe element, 0.7 to 1.0 percent of IIA group element and the balance of Al and inevitable impurities. The rotor alloy material can improve the toughness of basic metal, reduce damage caused by iron, and ensure the strength and hardness at the same time.

The application provides a two-dimensional Cu x Fe y Te crystal thin film and a preparation method thereof, and the method comprises the following steps: S1, selecting Cu, Fe and Te precursors, and pretreating a substrate; S2, mixing Cu and Fe, placing the mixed Cu and Fe in a first carrier, placing the Te precursor in a second carrier, and respectively arranging the first carrier, the second carrier and the substrate in corresponding areas of a CVD reaction device; S3, performing airtightness detection and carrier gas treatment on the CVD reaction device, and heating under the carrier gas condition to make the precursors sublimate and transport; S4, performing heat preservation growth under a preset temperature and the carrier gas condition to make the sublimated precursors react and deposit on the surface of the substrate; and S5, after the growth is completed, cooling the CVD reaction device to room temperature under an inert atmosphere, and obtaining a two-dimensional Cu x Fe y Te crystal thin film. Through regulation and control of the use amount ratio of the Cu, Fe and Te precursors and process parameters, the application realizes the synergistic transport and controllable deposition of the multi-element precursors, and prepares the two-dimensional Cu x Fe y Te crystal thin film with adjustable Cu / Fe element ratio and good crystallization quality.

The invention belongs to the technical field of titanium alloy materials, and particularly relates to a high-strength and high-plasticity alpha + beta double-phase titanium alloy based on collaborative evolution strengthening of multiple metastable phases and a preparation method of the high-strength and high-plasticity alpha + beta double-phase titanium alloy. The titanium alloy comprises the following chemical components in percentage by mass: 5.5 to 6.5 percent of Al element, 1.8 to 2.2 percent of Fe element, 2.3 to 2.7 percent of Nb element, 1.3 to 1.7 percent of Mo element, 1.3 to 1.7 percent of V element, 1.3 to 1.7 percent of Zr element and the balance of Ti. Solution quenching treatment is carried out in an alpha + beta two-phase region to obtain multiple metastable phases, and then aging treatment is carried out at 350-500 DEG C for 0.25-24 hours. According to the high-strength titanium alloy and the preparation method thereof, the alloy strength is greatly controlled and adjusted within the range of 1200-1800 MPa through cooperative regulation and control of various metastable phases, and therefore the performance bottleneck of a traditional high-strength titanium alloy in the aspect of strength and plasticity matching is broken through.

A TiFe-based hydrogen storage alloy and a preparation method thereof belong to the field of metal hydrogen storage materials. The chemical general formula of the TiFe-based hydrogen storage alloy is: Ti a Nd b Zr c Fe d Ni e Mn f wherein the atomic percentage of each element satisfies: the atomic percentage of Ti element is 46-53at%, the atomic percentage of Nd element is 0.1-1.5at%, the atomic percentage of Zr element is 1-6.5at%, the atomic percentage of Fe element is 27-40at%, the atomic percentage of Ni element is 2-10at%, and the atomic percentage of Mn element is 4.5-12at%; wherein Ti, Nd and Zr are first metal elements, Fe, Ni and Mn are second metal elements, and the ratio of the total atomic percentage of the first metal elements to the total atomic percentage of the second metal elements is 1.05-1.20. The TiFe-based hydrogen storage alloy can be activated at room temperature, has suitable hydrogen absorption and desorption platform pressure, and simultaneously maintains high hydrogen storage capacity and fast hydrogen absorption and desorption rate.

The invention discloses a wear-resistant and electric-corrosion-resistant CuFe-based in-situ composite material and a preparation method, and relates to the field of high-strength and high-conductivity copper alloy preparation.The preparation method comprises the steps that firstly, optimization design is conducted on formula optimization, Fe solid solution precipitation is promoted through microalloying, and the wear resistance and corrosion resistance of the material are enhanced; in addition, cold spraying parameters are optimized, the oxidation rate is reduced, and uniform distribution of Fe elements is promoted; and finally, optimizing a temperature gradient and a deformation gradient in a large deformation process, and promoting the Fe fibers to be refined, oriented and uniformly arranged, so as to obtain the CuFeCeYAg in-situ fiber reinforced composite material. The method has the advantages of high component control precision, high process stability and high repeatability, and excellent wear resistance and electric corrosion resistance of the in-situ composite material can be realized.

The present invention provides an iron-based amorphous alloy strip having a composition substantially represented by formula (I): FeaBbCcSid (I); wherein 82.0 < = a < = 86.0, 8.5 < = b < = 15.0, 1.6 < = c < = 6.0, 0.4 < = d < = 2.5, a, b, c and d respectively represent the atomic percentage contents of Fe, B, C and Si, a + b + c + d = 100, and basically, the iron-based amorphous alloy does not exclude trace impurities from raw materials or brought in in the processing process. The invention further relates to a method for preparing the iron-based amorphous alloy strip, an iron core comprising the iron-based amorphous alloy strip and application of the iron-based amorphous alloy strip. The combination of high saturation flux density and amorphous forming ability is realized by increasing the Fe element and balancing the content of non-metallic elements, so that the amorphous strip with high saturation flux density and soft magnetic performance is obtained.

The invention provides a low-thermal-expansion aluminum alloy frame material suitable for a photovoltaic module and a preparation method of the low-thermal-expansion aluminum alloy frame material, and relates to the technical field of photovoltaic modules, the low-thermal-expansion aluminum alloy frame material comprises aluminum alloy powder and negative thermal-expansion alloy particles, and the aluminum alloy powder is composed of matrix element aluminum and microelements of silicon, magnesium and copper; the negative thermal expansion alloy particles are composed of Hf, Zr, Ta and Fe elements, and specifically, the negative thermal expansion alloy particles are Hf < 0.7 > Zr < 0.2 > Ta < 0.1 > Fe < 2 >; the negative thermal expansion alloy particles with specific components are added into the aluminum alloy powder, the thermal expansion coefficient of the aluminum alloy composite material is remarkably reduced, the aluminum alloy composite material is matched with photovoltaic glass, thermal stress generated in the temperature changing process can be effectively reduced, fatigue failure of a sealing layer is avoided, the risk of glass burst is reduced, and the service life of the aluminum alloy composite material is prolonged. And meanwhile, the photovoltaic module frame has relatively high mechanical strength and corrosion resistance, and meets the use requirements of the photovoltaic module frame.