6 results about "Fe based" patented technology

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.

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.

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%.

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.