13 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 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 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.

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 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 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.