29 results about "Fe based" patented technology

The invention relates to a multi-scale precipitation strengthened wide-temperature-range high-toughness iron-based medium-entropy alloy and preparation and application thereof, and aims to solve the technical problems that the high-temperature strength of an existing iron-based medium-entropy alloy is insufficient, and the strength and the plasticity are difficult to consider at the same time. The alloy is prepared from the following components in percentage by atomic number: 46.6%-50.1% of Fe, 26.0%-30.0% of Ni, 5.0%-7.0% of Al, 2.0%-4.0% of Ti, 12.0%-14.0% of Cr, 0.5%-2.5% of Nb and 0-5% of trace elements. The alloy shows excellent obdurability matching in a wide temperature range of 77K-973K, particularly, the yield strength can reach 831-951 MPa at the high temperature of 973K, the ductility reaches 10-31%, and meanwhile, the alloy has good corrosion resistance; compared with a contrast which does not contain the Nb element, the alloy disclosed by the invention shows more excellent comprehensive strength and plasticity at low temperature, room temperature and high temperature. In addition, the cost of the alloy can be comparable with that of traditional steel, a component regulation window is wide, and huge engineering application potential is shown.

The invention relates to the technical field of shield tunneling machines, and particularly discloses a shield hobbing cutter ring and a remanufacturing method thereof. According to the method, the iron-based alloy powder serves as a main body, the modified powder is added as an auxiliary, the remanufactured alloy powder is obtained, the alloy deposition layer is formed on the surface of the cutter ring body through the remanufactured alloy powder, and remanufacturing machining of the shield hob cutter ring is completed. Under the synergistic effect of the components of the modified powder, the alloy deposition layer can have good hardness and wear resistance, the defects of iron-based self-fluxing alloy are overcome, the defects of the remanufactured and repaired cutter ring in the tunneling process are reduced, and various extreme service conditions can be fully dealt with.

The present application relates to a kind of Ga-Fe base liquid alloy catalyst and its preparation method and application, the Ga-Fe base liquid alloy catalyst includes metal Ga, metal Fe and metal M, the metal M is one of Ti, Mn, Co, Ni, Cu, Zr, Nb, Mo, W.The Ga-Fe base liquid alloy catalyst provided in the present application is with metal Ga as matrix, with metal Fe and metal M as active catalytic site, based on metal Ga can be mutually soluble with other metals and form low melting point alloy characteristics, so that in the alloy catalyst formed can become liquid at reaction temperature and carry out reaction, due to the flow characteristics of liquid, it is advantageous to the metal active component of synthesis ammonia constantly refreshes at interface, so that nitrogen and hydrogen and metal Fe, metal M contact more fully, mass transfer efficiency is higher, and the phenomenon of traditional solid catalyst active site poisoning deactivation does not occur, so that N2 and H2 can effectively react to generate ammonia under low temperature and low pressure conditions.

The invention relates to a 42CrMo coal machine hydraulic prop surface defect repairing method based on laser cladding, which adopts iron-based self-fluxing laser cladding alloy powder with specific components as repairing alloy powder, and forms a repairing layer on a defect part through laser scanning cladding. The alloy powder comprises, by mass, 15%-20% of Cr, 0.3%-0.6% of Mn, 2%-4% of Ni, 0.5%-1% of Si, 0.4%-1% of B, 2.5%-5% of Mo and the balance Fe and inevitable impurities. Through collaborative optimization of alloy powder component design and a laser process, high-strength metallurgical bonding of a repairing layer and a matrix is achieved, the repairing layer is compact in structure and free of defects, the abrasion resistance and corrosion resistance of the coal machine hydraulic prop are remarkably improved, and the service life of the coal machine hydraulic prop is remarkably prolonged.

The present invention relates to a high-strength and corrosion-resistant iron-based medium-entropy alloy with a tensile strength of 1900 MPa and a preparation method thereof. The chemical composition by weight percentage is as follows: Fe a%; Cr b%; Ni c%; Al d%; Ti e%; Mo f%; Cu g%; P i%; S j%; wherein, 47 < a < 58, 13 ≤ b ≤ 15, 22 < c ≤ 25, 2 ≤ d ≤ 3, 4 ≤ e ≤ 6, 1 ≤ f ≤ 2, 0 ≤ g ≤ 1, i ≤ 0.001, j ≤ 0.001, and a + b + c + d + e + f + g + i + j = 100; the mixing entropy is 1R to 1.5R, and R = 8.314 J / (mol*K). The high-strength and corrosion-resistant FeCrNiAlTi-based medium-entropy alloy with a tensile strength of 1900 MPa has good corrosion resistance, a tensile strength ≥ 1900 MPa, reduces the preparation cost, and is beneficial to industrial production.

Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.

The present invention provides an iron-based MOF and induced titanium dioxide composite catalyst, a preparation method and an application, including: Step 1, loading TiO2 on the surface of a MOF(Fe) carrier to form a MOF(Fe)@TiO2 composite catalyst. Step 2, loading TiO2 on the surface of a Fe2O3-HT carrier to form a Fe2O3-HT@TiO2 composite catalyst. Step 3, subjecting the MOF(Fe)@TiO2 prepared in Step 2 to high-temperature calcination and annealing under atmosphere protection to obtain a Fe2O3@TiO2-HT composite catalyst. The composite catalyst is used as a catalyst for the thermal decomposition of ammonium perchlorate. The present invention explores the application of MOF(Fe) and Fe2O3 materials in the catalytic thermal decomposition reaction of AP and obtains good catalytic performance. Compared with the traditional TiO2 (P25) catalyst, the high-temperature decomposition peak temperature for catalyzing the thermal decomposition of AP is significantly advanced.

A bipolar plate that is configured for electrolysis has a lower metal sheet and an upper metal sheet. The lower and upper metal sheets are interlinked and the materials of the metal sheets are distinctly different from each other, meaning that one of them is iron-based or nickel-based and the other is not, or an alloying element is present to a greater or lesser degree, or a proportion of an alloying element differs between the materials of the two metal sheets.

The invention provides iron-based high-hardness alloy powder for laser cladding and application, and belongs to the field of laser cladding. The ceramic particle reinforced iron-based high-hardness alloy powder consists of the following chemical components: greater than or equal to 50% of an iron-based alloy powder material and less than or equal to 50% of a ceramic particle material. By reasonably designing the chemical components of the ceramic particle reinforced iron-based high-hardness alloy powder, the hardness of the iron-based high-hardness alloy powder can reach 64 HRC or above, and the ceramic particles can improve the wear resistance of a cladding layer. When the ceramic particles are added into the cladding layer, due to the fact that the ceramic particles are good in thermal stability and high in hardness, the dispersion strengthening effect can be achieved, the interface between the particles and the iron-based material can serve as a crack propagation obstacle, and the abrasion resistance of the cladding layer is improved. Therefore, the technical problems of insufficient hardness and insufficient wear resistance of a cladding layer formed by laser cladding are solved.

It is proposed a method to enable manufacturing of a steel sheet having a beautiful coated layer, when applying hot-dip galvanizing to a steel sheet containing oxidizable elements. The method comprises: an electroplating step of, in a gap between a steel sheet and an electrode plate, forming Fe-based plating on the surface of the steel sheet through electroplating, by supplying an Fe-based plating solution; an annealing step of subjecting the steel sheet to heat treatment; and a hot dip coating step of applying hot-dip galvanizing to the steel sheet, and, in the electroplating step, a plating solution discharge rate, which is the ratio of the flow rate of the plating solution flowing out to the back side that is not facing the steel sheet of the electrode plate, to the flow rate of the plating solution supplied to the steel sheet, is less than 50%.

The application discloses a high-strength and high-toughness dual-phase iron-based medium-entropy alloy and a preparation method thereof, and relates to the field of alloy materials. The alloy comprises the following components in mass percentage: Fe: 64.5%, Co: 5.5%, Cr: 12.6%, Ni: 11%, Al: 1.0%, Si: 3.6% and Mo: 1.8%. The high-strength and high-toughness dual-phase iron-based medium-entropy alloy is obtained through the following steps: preparing raw materials, smelting, rolling forming, recrystallization annealing, microscopic structure observation and mechanical property testing. The medium-entropy alloy has a yield strength of 1.1 GPa at room temperature, a tensile strength of 1.2 GPa and an elongation of 44%, and therefore, the alloy has excellent strength and plasticity synergy at room temperature and excellent comprehensive performance. The medium-entropy alloy saves the content of high-cost elements, reduces the cost, is beneficial to large-scale production and has a wide application prospect.

The invention discloses a machinable and non-machinable composite wear-resistant hard material and a preparation method thereof.The material is formed by compounding a non-machinable layer and a machinable layer into a whole through a powder metallurgy technology, the non-machinable layer is made of steel bond hard alloy with titanium carbide as a hard phase, and the machinable layer is made of an iron-based machinable material; an interface between the two layers is metallurgically bonded; the preparation method comprises the steps of uniform mixing, glue mixing granulation, pressing forming, degreasing sintering and vacuum sintering. The high-hardness and high-wear-resistance non-machinable layer and the machinable layer which is excellent in plasticity and toughness and capable of being processed are compounded into a whole, and performance combination which cannot be achieved by a single material is achieved.

The invention provides an iron-based current collector metal foil, the metal foil is provided with an edge passivation structure, and in the thickness direction of the metal foil, the upper edge and the lower edge of the metal foil respectively form an edge passivation angle with the side surface. The passivation angle structure is formed in the thickness direction of the current collector or the pole piece, particularly the edge geometric design with the passivation angle of 95-120 degrees and the passivation width of 10-50 microns is adopted, and a fillet or fillet-like structure with the curvature radius larger than or equal to 50 microns is further preferably selected, so that the piercing risk is reduced, short circuit is prevented, and meanwhile the electrode interface stability is improved.

This invention discloses Co-Fe based on a coordination-driven triple doping strategy. 1‑x S@N,S-C composite materials, their preparation methods, and applications. This material, prepared via coordination precipitation-polymerization-carbonization, exhibits a unique honeycomb porous structure, with cobalt-doped Fe as its core. 1‑x S is coated with a nitrogen- and sulfur-doped carbon layer. This triple-doped structure induces Fe through Co doping. 1‑x The sulfur lattice generates sulfur vacancies, significantly enhancing the Na content. + The material exhibits strong adsorption and diffusion capabilities; simultaneously, the N and S co-doped carbon layer not only enhances electronic conductivity but also effectively anchors polysulfides through strongly polar C-S and C-N bonds, forming a strong interfacial coupling with the active core to synergistically buffer volume expansion. When used as an anode in sodium-ion batteries, this material demonstrates high reversible capacity, excellent rate performance, and ultra-long cycle life. When paired with a Na3V2(PO4)3@C cathode to assemble a full cell, the energy density reaches as high as 228 Wh / kg. ‑1 It has broad application prospects.

DEPCT6625 / 07 / 2566 What was provided was a steel plate with excellent resistance to breakage during welding. Resistance at the welded area despite the crystal arrangement of the electroplating layer containing Fe. It is a base and cold-rolled steel sheet with Si integrated at a high ratio at the section. The bonding between an electroplating layer based on Fe and a cold-rolled steel sheet based on Si is... It is supplied as an electroplated steel sheet with a Fe-based coating, using a cold-rolled steel sheet. Si containing 0.1% or more by mass and 3.0% or less by mass, and coating layers. With an electric Fe-based material that is formed on at least one surface of a rolled steel sheet. Cold-pressed Si with a coating weight per surface area greater than 20.0 g / m², where the crystal arrangement of the layers is... Electroplating with Fe as a base and cold-rolled steel sheets with Si were integrated. A ratio greater than 50% at the interface between the Fe-based electroplating layer and... Cold-rolled steel sheet containing Si;

The application provides an iron-based medium-entropy alloy with excellent mechanical properties in a wide temperature range and a preparation method thereof, and the alloy contains Fe: 56.3%, Ni: 20%, Cr: 13%, Al: 9%, Mo: 1.4% and Si: 0.3% in terms of atomic percentage. The alloy ingot is subjected to cold rolling (a reduction rate is 85%) to make the alloy generate grain refinement effect due to deformation, and then is subjected to recrystallization annealing heat treatment at 800 DEG C for 10 minutes, and then is rapidly subjected to water quenching to obtain the alloy. Compared with some high-entropy alloys and traditional alloys, the experimental sample has good strength and plasticity through reasonable component configuration and preparation process, has excellent strength and uniform elongation at 298K, 77K and 973K, and is an iron-based medium-entropy alloy with excellent mechanical properties in a wide temperature range.

The invention relates to the technical field of high-temperature alloys, and provides a preparation method of a Ni-Cr-Fe-based high-temperature alloy radial forging bar, which specifically comprises the following steps: S1, carrying out radial forging on a Ni-Cr-Fe-based high-temperature alloy blank; s2, the high-temperature alloy bar obtained after radial forging is heated and then subjected to heat preservation and standing treatment; s3, the obtained high-temperature alloy bar is subjected to pre-deformation shaping; s4, the obtained high-temperature alloy bar is subjected to low-temperature solid solution preheating treatment; and S5, the obtained high-temperature alloy bar is firstly subjected to solution treatment and then subjected to two-stage aging treatment, and the Ni-Cr-Fe-based high-temperature alloy radial forging bar is obtained. According to the method, in the preparation process of the radial forging bar, through a series of steps of constant-temperature standing, pre-deformation shaping, low-temperature solid solution and multi-stage standard heat treatment, the structure uniformity and precipitated phase precipitation of the Ni-Cr-Fe-based high-temperature alloy radial forging finished bar are controlled, and the high-stability structure and bar quality of the Ni-Cr-Fe-based high-temperature alloy are achieved.

The invention discloses a multi-principal-element iron-based medium-entropy alloy with fatigue resistance and a preparation method of the multi-principal-element iron-based medium-entropy alloy, and the multi-principal-element iron-based medium-entropy alloy comprises the following components in atomic percent: 52-56% of Fe, 29-33% of Ni and 15% of Al, the multi-principal-element iron-based medium-entropy alloy is of a double-phase structure and comprises an austenite phase and a ferrite phase, the density of the multi-principal-element iron-based medium-entropy alloy is 6.43-7.03 g / cm < 3 >, the tensile strength of the multi-principal-element iron-based medium-entropy alloy is 739-835 MPa, the ductility of the multi-principal-element iron-based medium-entropy alloy is 21-55.46%, the fatigue strength of the multi-principal-element iron-based medium-entropy alloy under the room temperature environment is 180-187 MPa, and the fatigue strength of the multi-principal-element iron-based medium-entropy alloy under the 600 DEG C environment The prepared multi-principal-element iron-based medium-entropy alloy solves the problem of failure caused by high-cycle fatigue of aluminum alloy, gray cast iron and vermicular graphite cast iron used in a traditional air cylinder cover in a high-temperature environment due to strength reduction and mechanical property deterioration, has good thermal stability, hardness and strength and meanwhile has good obdurability; and the room-temperature and high-temperature fatigue performance is obviously improved.

A lightweight metal-based composite material and its preparation method include the following components, calculated by mass ratio: inorganic aerogel powder: metal alloy powder = (4-6):1, wherein the metal alloy powder is any of iron-based, titanium-based, aluminum-based, cobalt-based, and nickel-based, and the inorganic aerogel powder is any of oxide aerogel, fluoride aerogel, carbide aerogel, and nitride aerogel. The lightweight metal-based composite material can be prepared using the laser powder bed fusion method using these materials. The present invention introduces inorganic aerogel powder into metal powder. The resulting metal-based composite material combines the advantages of both metal and aerogel, facilitating lightweighting of the metal-based composite material and improving the performance of the composite material.

The invention belongs to the technical field of metal material surface coatings, and particularly relates to a coating structure applied to the surface of a magnesium alloy biological material and a preparation method of the coating structure. In order to solve the problem of fast corrosion of a medical magnesium alloy material, the invention provides a method for coating polytetrafluoroethylene and an iron-based material on the surface of a magnesium alloy matrix in sequence, so that the corrosion rate of the magnesium alloy material is regulated and controlled, and the medical performance of a medical magnesium alloy implant is improved. The method comprises the following steps: polishing a magnesium alloy sample; then the sample and the polytetrafluoroethylene target material are installed in a magnetron sputtering cavity, and the polytetrafluoroethylene coating is prepared under set parameters; and replacing an iron-based target material to prepare the iron-based coating on the surface of the polytetrafluoroethylene coating, and finally obtaining the coating structure. The coating structure can regulate and control the corrosion rate of the magnesium alloy and improve the corrosion resistance of the medical magnesium alloy material, meanwhile, biocompatibility is considered, and the coating structure has the advantages of being good in binding force, easy and convenient to prepare, environmentally friendly, excellent in performance and stable in process and has important significance on application and popularization of the medical magnesium alloy material.

The present application relates to a kind of in situ TiC / Fe base metal ceramic composite wear-resistant powder, coating and preparation method, belong to laser melting deposition technical field.Compared with prior art in situ TiC / Fe base composite wear-resistant coating preparation technology, the graphite (or nickel-coated graphite) content in the powder formula of the present application is lower, can effectively improve the uniformity of in situ TiC ceramic reinforced phase distribution in coating, effectively improve the wear resistance of coating, can realize the preparation of high-performance repair or strengthening coating of low crack sensitivity of component surface.The composite coating is prepared by laser melting deposition technology process after pure Ti, nickel-coated graphite and Fe55 alloy powder are ball milled according to certain ratio.The uniformly distributed in situ submicron TiC particles in Fe base composite coating have pinning effect on surrounding "soft metal", inhibit crack propagation by "deflection", and TiC particles can continuously play the role of wear-resistant framework under the support of surrounding metal phase, finally improve the wear resistance of coating material.

The application discloses a preparation method of Ni-Fe based high-temperature alloy ingot for ultra-supercritical thermal power generating unit, and belongs to the field of nonferrous metallurgy. The mass percentage of the Ni-Fe based high-temperature alloy ingot is as follows: C: 0.03-0.04, Al: 1.30-1.50, Ti: 2.00-2.20, Si: <=0.10, Cr: 15.5-16.5, Mo: 0.7-0.9, W: 0.1-0.3, B: 0.002-0.005, Fe: 41.0-43.0, Nb: <=0.05, Ta: <=0.05, and the rest is Ni. The application prepares an induction electrode through a vacuum induction + vacuum casting smelting mode, reduces the burning loss of Al and Ti elements in the vacuum induction smelting process, and improves the yield of Al and Ti elements. The alloying process of Al and Ti elements is completed in the subsequent vacuum consumable smelting process, so that the accurate control of the components is facilitated. Finally, the Ni-Fe based high-temperature alloy ingot for ultra-supercritical thermal power generating unit with accurate components and high density is obtained.

A catalyst includes an alumina support, GdFeO3 distributed on the alumina support, and Fe2O3 distributed on the alumina support. The GdFeO3 is in the form of an orthorhombic perovskite structure with a Pbnm space group, and the Fe2O3 is in the form of γ-Fe2O3. Further, the catalyst includes 1 percent by weight (wt. %) to 7 wt. % of Gd and 5 wt. % to 15 wt. % of Fe based on a total weight of the catalyst.

This invention belongs to the field of solid-state hydrogen storage technology, specifically relating to a high-volume-capacity and easily activated Ti-Fe-Mn-Ce-Zr-based hydrogen storage alloy and its preparation method. The specific composition of the hydrogen storage alloy is Ti1Fe. 0.9 Mn 0.1 Ce x Zr y x is any value among 0.02, 0.04, and 0.06, and y is any value among 0.02 and 0.06. This invention optimizes the alloy composition by adding transition elements Mn and Zr, and rare earth element Ce, to the AB-type hydrogen storage alloy TiFe. The rare earth element Ce exists as an independent phase, while the transition elements Zr and Mn partially replace the elements on the A and B sides, respectively. This results in the appearance of second phases Ce, CeO, and ZrMn2 in the TiFe matrix, significantly improving the activation performance of the Ti-Fe based alloy.

The invention provides a turbine blade repairing material for an extreme service environment and a repairing method, and relates to the technical field of material engineering. The turbine blade repairing material for the extreme service environment and the repairing method comprise the steps that S1, repairing powder is prepared, specifically, an iron-based or nickel-based heat-resisting alloy serves as a base body, an yttrium oxide dispersion strengthening phase is introduced into the base body, oxide dispersion strengthening alloy powder is prepared through a rotating electrode atomization method, the powder is screened, and the powder is obtained; and fine powder for blade repair is obtained. A stably distributed yttrium oxide dispersed phase is introduced into a heat-resistant alloy matrix, and fine powder with uniform components and controlled granularity is obtained by means of rotating electrode atomization, so that the material for repairing has higher structure stability and oxidation resistance in a high-temperature environment; and removing and positioning the damaged area of the blade tip by taking the bottom surface of the blade root as a unified reference.

The invention relates to the technical field of laser additive manufacturing, and discloses a Sn-reinforced Cu-Fe-based composite material and a preparation method and application thereof. According to the invention, a trace amount of Sn element is introduced as an interface modifier, so that the wettability and bonding strength between Cu and Fe are effectively improved, interface defects are reduced, and a microscopic foundation is laid for synergistically exerting the heat conduction effect of Cu and the strengthening effect of Fe; 532 nm green laser is creatively adopted for selective laser melting forming, the laser energy absorption efficiency of Cu powder is greatly improved, stable melting under low heat input is achieved, burning loss and segregation of the Sn element are effectively restrained, and a supersaturated solid solution is formed through ultrafast cooling; the medium-temperature aging treatment at the temperature of 400-500 DEG C is specifically adopted, supersaturated atoms are driven to separate out a nanoscale strengthening phase, Cu matrix crystal lattices are purified to greatly recover the electric conduction and heat conduction performance, and meanwhile the high strength of the material is kept through precipitation strengthening.

A single-crystal iron-based superelastic alloy with high strain recovery capability and its preparation method are disclosed, belonging to the technical field of iron-based superelastic alloys. Its chemical composition and mass percentage are: Ni: 30-40%, Al: 5-15%, Ti: 0.5-5%, Cr: 0.5-5%, Mo: 0.5-5%, Y: 0.01-0.1%, with the balance being Fe and unavoidable impurity elements. The preparation method includes vacuum smelting, protective atmosphere electroslag remelting secondary refining, homogenization heat treatment and hot rolling, directional annealing, cyclic heat treatment, quenching, and aging treatment. This invention, through the combination of composition and production process, significantly improves the single-crystal preparation efficiency while obtaining high strain recovery performance. The prepared iron-based superelastic alloy single crystal has a grain size ≥66mm and a strain recovery capability ≥7.1%.

1. The name of the design product: iron-based inner semicircular resin grinding plate. 2. The use of the design product: the design product is used for processing stone slabs. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

This invention belongs to the field of new materials and surface engineering technology, specifically a method for preparing a hard composite material coating for the surface of contact parts in a glass fiber production line and its wear-resistant properties. The method includes cleaning and roughening pretreatment of the metal substrate contact surface. The transition bonding layer is made of a nickel-based or iron-based self-fluxing alloy and forms a metallurgical bond with the substrate. The hard wear-resistant composite coating is composed of a high-entropy alloy metal phase and a hard ceramic reinforcing phase, achieving a metallurgical bond and preventing coating cracking and peeling. The gradient structure balances toughness and wear resistance. The lubrication layer further reduces friction loss, improves the wear resistance and corrosion resistance of the contact parts, extends their service life, reduces yarn scratches, and balances the service life of the contact parts with the quality of the glass fiber products. It leverages the wear resistance advantages of the coating, extends the service life of the contact parts, and is adaptable to various glass fiber production lines without requiring additional specialized equipment, making it highly industrially applicable.