18 results about "Zr alloy" patented technology

The application discloses a kind of high-strength high-toughness Al-Si-Mg-Ti-Sr-Zr alloy based on machine learning auxiliary design and preparation method, belong to aluminum alloy material preparation technical field.The application generates multidimensional physical material descriptor by constructing as-cast Al-Si-Mg alloy composition-property database, obtains key descriptor by four-step feature screening, establishes high-precision performance prediction model using CatBoost algorithm, determines the optimal composition Al-7Si-0.55Mg-0.15Ti-0.025Sr-0.2Zr by combining SHAP interpretability analysis and multi-objective traversal optimization.The organization is dense as-cast alloy obtained by vacuum medium-frequency induction melting preparation, through vacuumizing, argon washing, grading temperature, melt mixing, pouring cooling.The application deeply fuses data-driven design and microalloying synergistic strengthening, short development cycle, low cost, model is explainable, process is stable and controllable, solves traditional alloy strength and plasticity mismatch, composition design is blind, organization control is difficult and other problems, is suitable for automobile light weight, aerospace, precision machinery and other fields with high requirements for strength and toughness.

The application discloses an Al-Si-Mg-Ti-Sr-Zr alloy heat treatment optimization method based on machine learning regulation, and belongs to the technical field of aluminum alloy materials. The application is based on machine learning assisted component design, adopts vacuum medium frequency induction melting to prepare as-cast alloy, and obtains a compact-structure and uniform-component ingot through vacuum pumping, argon gas washing, grading current heating, melt shaking and mixing, and pouring cooling; then, T5 and T6 double-system heat treatment is carried out according to GB / T 1173-2013 specification, solid solution time, aging temperature and aging time are systematically optimized, and optimal process parameters are determined. After optimal process treatment, the alloy realizes complete spheroidization of eutectic Si, dispersion precipitation of (Al, Si)3(Zr, Ti) phase, and coherent strengthening of nanoscale Mg2Si phase, the maximum tensile strength can reach 341 MPa, the elongation is 5.5%, the comprehensive mechanical properties are significantly better than those of a commercial ZL101A alloy, the expensive Sc element is not used, the cost is low, the process is stable, the industrial production can be realized, and the application can be used in the field of lightweight structural parts such as automobile engine supports, gearbox housings and chassis structural parts.

A method for controlling and optimizing the fracture toughness of low-Mg-content high-strength aluminum alloys using laser additive manufacturing was developed. The mass percentages of each element in the prepared Al-Mg-Mn-Sc-Zr alloy were: Mg: 1.1%–2.2%, Mn: 2.1%–2.2%, Sc: 0.7%–0.8%, Zr: 0.4%–0.5%, with total impurities not exceeding 0.1%, and the balance being Al. The fracture toughness value K of the alloy was... IC ≥37.5 MPa∙m 1 / 2 Furthermore, as the Mg content decreases within the range of 1.1% to 2.2%, the fracture toughness value K of the alloy decreases. IC The trend is upward. Therefore, this invention reveals the quantitative correlation between Mg content and fracture toughness in the alloy within the low Mg content range, finding that reducing Mg content significantly improves fracture toughness within this range, providing a novel approach for toughness control of high-strength aluminum alloys.

This invention discloses a microalloyed copper-chromium-zirconium alloy. The alloy comprises the following components by mass percentage: Cr: 0.2–1.2%, Zr: 0.05–0.2%, Ni: 0.01–0.05%, Si: 0.001–0.01%, Ti: 0.002–0.006%, Re: 0.001–0.008%, where Re is two or more of Sc, La, Y, and Ce. The microstructure of this microalloyed copper-chromium-zirconium alloy includes a second phase, which comprises a composite nano-precipitate containing Ni, Si, Cr, and Zr. This copper-chromium-zirconium alloy exhibits high strength and electrical conductivity, as well as good bending and high-temperature softening resistance. This invention also discloses a method for preparing the sheet / strip of this microalloyed copper-chromium-zirconium alloy and its application in connectors.

This invention belongs to the field of magnesium alloy technology, specifically relating to a magnesium-gadolinium-neodymium-calcium-zirconium alloy, its preparation method, and its applications. The magnesium-gadolinium-neodymium-calcium-zirconium alloy provided by this invention comprises the following elemental components by mass percentage: gadolinium 3-6%, neodymium 0.5-2%, calcium 0.1-1.5%, zirconium 0.2-0.8%, with the balance being magnesium. This invention reduces the content of the heavy rare earth element gadolinium to below 6 wt.%, and adds a small amount of the less dense light rare earth element (neodymium) and the inexpensive alkaline earth metal element (calcium). Utilizing the synergistic effect of these dissimilar elements, the solid solubility of each element in magnesium is reduced. Combined with low-temperature positive extrusion and short-term creep aging treatment, this promotes the precipitation of nanoscale second phases, resulting in a large number of nanoscale second phases uniformly distributed in the magnesium matrix. This promotes dynamic recrystallization, refines the microstructure, and enhances the mechanical properties of the magnesium alloy, giving the magnesium-gadolinium-neodymium-calcium-zirconium alloy both high strength and high plasticity.

This invention belongs to the field of materials forming technology and discloses a method for preparing ultrafine-grained, highly conductive Cu-Cr-Zr alloy by medium-temperature multi-directional forging. The specific technical solution is as follows: a Cu-Cr-Zr alloy billet is provided and subjected to solution treatment, followed by water cooling to obtain a supersaturated solid solution; the solution-treated billet and the mold are heated together to a forging temperature of 350~550℃, and the billet is subjected to multi-pass multi-directional forging. Each pass includes upsetting deformation along the three orthogonal directions X, Y, and Z of the billet. Through multi-directional forging under medium-temperature conditions, the Cu-Cr-Zr alloy achieves large plastic deformation, and while accumulating large strain, the grains are significantly refined to obtain a uniform ultrafine-grained structure, thereby achieving a good match between hardness and conductivity. Under optimal process conditions, the grain size of the alloy can be refined to 0.52 μm, the hardness can reach above 178 HV, and the conductivity can reach 67.1% IACS.

This invention discloses a plastic processing technology for Mg-Gd-Y-Zn-Zr alloy components. The preparation process includes the following steps: A. Melting and semi-continuous casting Mg-Gd-Y-Zn-Zr alloy bars with a diameter of Φ330mm-430mm; B. Homogenizing annealing of the ingot; C. Turning and blanking to obtain bars with a diameter of Φ290mm-390mm; Before extrusion, the billet and die are held at 380-450℃ for 1-3 hours; After the holding period, the billet is laid horizontally. The process involves: A) Forward extrusion with an extrusion ratio of 4-9 and a hydraulic rod feed speed of 0.5-3.5 mm / s; air cooling after extrusion; B) Machining a cuboid billet with a cross-sectional side length of 35-55 mm and a length of 70-110 mm from the extruded billet; the length direction of the cuboid billet is perpendicular to the extrusion direction; C) Performing 5-13 passes of equal-diameter angular extrusion on the cuboid billet in a die with an included angle of 90°; after deformation, the surface temperature of the billet is 205-305℃, followed by air cooling to room temperature. Using this process, the prepared Mg alloy components exhibit very weak anisotropy in mechanical properties, which can promote the in-depth application of Mg alloy components in transportation, aerospace, and other fields.

The present application relates to a method for predicting expansion rate and shrinkage rate in the solidification process of Mg-Zr alloy, comprising: determining the content of zirconium element in magnesium alloy, smelting the magnesium alloy, pouring the smelted magnesium alloy into a mold for solidification; during the solidification process, based on the content of the zirconium element, respectively constructing an expansion rate prediction model and a shrinkage rate prediction model; based on the expansion rate prediction model and the shrinkage rate prediction model, predicting the expansion rate and shrinkage rate of the magnesium alloy. The present application is suitable for the smelting and casting process of conventional commercial magnesium alloy, and through the actual Zr content of Mg-Zr alloy, the expansion rate and shrinkage rate in the solidification process of the alloy melt are accurately predicted.

The application relates to a preparation method of a surface-hardened aluminum alloy gradient structure based on precipitation phase regulation, and the preparation method comprises the following steps: S1: Al-Mg-Sc-Zr alloy smelting, homogenization heat treatment, hot rolling and annealing treatment, so as to obtain a supersaturated plate containing micron Al3(Sc, Zr) phases; S2: a gradient thermal field is constructed in the thickness direction of the aluminum alloy plate by using friction stir progressive forming; micron phases are broken and nanophase dynamic precipitation is induced under high temperature and high strain of the surface layer, recrystallized grain growth is inhibited through a double pinning effect, and surface nanocrystalline is locked; coarse grains are retained in the core under low temperature and low strain; and S3: after the aluminum alloy plate is cooled, post-treatment is carried out, so that the surface-hardened aluminum alloy gradient structure is obtained. The application utilizes the differential evolution mechanism of double-scale precipitation phases, effectively solves the problem that surface fine grains of an aluminum alloy gradient structure are prone to thermal coarsening, realizes high strength and plasticity synergy without subsequent heat treatment, and has the advantages of a short process, low energy consumption and shape-property integrated manufacturing.

This invention discloses an antibacterial and bioactive composite film layer on the surface of a zirconium-based amorphous alloy, its preparation method, and its application, belonging to the technical field of biomedical zirconium alloy coating materials. Hydroxyapatite nanoparticles and strontium are introduced into the micro-arc oxidation process. Hydroxyapatite (HA) possesses excellent osteoconductivity, osteointegration capacity, osteoinductive properties, and biocompatibility; strontium plays a unique role as a "bidirectional regulator of bone metabolism" in biomedical materials. Furthermore, the incorporation of Cu endows the micro-arc oxidation film layer with broad-spectrum and long-lasting antibacterial capabilities. This invention generates a composite film layer with both antibacterial and bioactive properties on the surface of a zirconium-based amorphous alloy through a single micro-arc oxidation step, enhancing its overall service performance in physiological environments.

This invention relates to the field of additive manufacturing materials technology, specifically to a high thermal conductivity copper-based additive manufacturing material with a low coefficient of thermal expansion. The material is a composite powder for laser powder bed melting, comprising the following components by volume percentage: matrix phase: 50-75% copper alloy matrix powder, wherein the copper alloy matrix is ​​either a Cu-Cr alloy or a Cu-Zr alloy; rigid framework phase: 15-30% low-expansion phase powder with pre-metallized surface; interface-activated phase: 5-10% nanoscale carbide particles. This invention differs from the isolated, dispersed "sea-island" structure of traditional composite materials. Through additive manufacturing, it achieves continuous interpenetration between the rigid framework phase and the copper matrix phase in three-dimensional space. This structure ensures the framework support of the low-expansion phase while providing a continuous channel for phonon transmission, avoiding a sharp decrease in thermal conductivity due to interface scattering.

The application discloses an ultra-low elastic modulus biomedical zirconium alloy and a preparation method thereof. The alloy contains three alloying elements, and the mass percentage of the three alloying elements is as follows: Zr 71-80wt%, Nb 20wt%, Ta 1-9wt%, and the rest is inevitable impurities. In the preparation, the content of Ta is controlled, and three-stage solid solution-ageing-quenching heat treatment is combined to effectively stabilize the beta-Zr phase, and the synergistic optimization of the elastic modulus and the strength of the alloy is realized. With the increase of the content of Ta, the tensile strength of the alloy increases first and then decreases, and the elastic modulus of the alloy decreases first and then increases. When the content of Ta is optimal, the elastic modulus of the alloy is as low as 15.2 GPa, and the peak value of the tensile strength is 861 MPa. The "stress shielding effect" is significantly inhibited, and the mechanical matching with the bone tissue and the long-term stability of the implant are greatly improved.

This invention belongs to the field of non-ferrous metal material processing technology, specifically relating to a copper-chromium-zirconium electrode cap wire, its preparation method, and its application. The preparation method of the copper-chromium-zirconium electrode cap wire includes the following steps: (1) melting and casting Cu-Cr-Zr alloy ingots, wherein the Cr content is 0.5%-1.2%, the Zr content is 0.05%-0.2%, and the balance is Cu; (2) heating and holding the ingot at 950℃-980℃, and hot rolling with a total deformation of more than 85%; (3) solution treatment of the hot-rolled material; (4) cold rolling and / or cold drawing of the solution-treated material; (5) holding at 400℃-460℃ for 5-10h to allow the alloying elements to precipitate in the form of precipitated phases. The copper-chromium-zirconium electrode cap wire prepared by this invention has high hardness, high conductivity, high strength and high elongation. This wire is particularly suitable for cold heading in electrode cap manufacturing, which makes the electrode cap have good formability, high yield, stable welding performance and long service life, significantly improving the performance and economic benefits of resistance welding electrode caps.

The application provides a kind of superhigh strength corrosion-resistant low alloyed Mg-Al-Mn-Y-Zr alloy and its preparation method, belongs to magnesium alloy technical field.The application uses magnesium, aluminum, magnesium manganese intermediate alloy, magnesium yttrium intermediate alloy, magnesium zirconium intermediate alloy as raw material, is prepared into high-strength corrosion-resistant magnesium alloy after melting casting, solid solution treatment, low-temperature extrusion, the components of the alloy are Al:0.1%;Mn:0.1%;Y:0.1%;Zr:0.1%, the rest is magnesium and unavoidable impurities.The alloy prepared by the application has elongation of 5%, tensile strength of 501.3MPa, yield strength of 400.9MPa, corrosion rate in simulated body fluid of 0.07mm / a, and the preparation method has the advantages of low cost, simple process, short process, etc.

This invention discloses an aging treatment method for Mg-Gd-Zr alloys, comprising the following steps: providing an extruded Mg-Gd-Zr alloy; aging the extruded Mg-Gd-Zr alloy at 220-230℃ for 6-8 hours under a pulsed magnetic field, followed by cooling to obtain an aged Mg-Gd-Zr alloy; wherein the pulsed magnetic field has a current of 1-5A, a frequency of 12-16Hz, and a duty cycle of 45-55%. This invention ages the extruded Mg-Gd-Zr alloy under pulsed magnetic field conditions, significantly enhancing the alloy's strength and ductility through the synergistic effect of electromagnetic force and Joule heating. The shorter aging time of this invention helps improve processing efficiency and reduce aging treatment costs.

This invention relates to the field of alloy materials and provides a low-density Nb-Si-Ti-Zr alloy with high room-temperature fracture toughness and high-temperature oxidation resistance. The alloy is composed of Nb, Si, Ti, and Zr, wherein the Si content is 18-19%, the Ti content is 24-26%, the Zr content is 8-10%, and the balance is Nb. This invention achieves improved room-temperature fracture toughness and high-temperature oxidation resistance while reducing density compared to existing Nb-Si-Ti alloys through alloy composition design. The provided alloy material consists of Nbss and Nb5Si3 phases, with Zr dissolved in the Nbss and Nb5Si3 phases, forming solid solution strengthening. Furthermore, the addition of Zr promotes the formation of the Nbss and Nb5Si3 phases. This allows the Nb-Si-Ti-Zr alloy to retain the high melting point and high strength advantages of existing Nb-Si-Ti materials while significantly improving its room-temperature fracture toughness and high-temperature oxidation resistance, thus meeting the requirements of the aerospace field for lightweight, high-melting-point, and oxidation-resistant high-temperature structural materials.

The application provides a Mg-Zr intermediate alloy and a preparation method and application thereof, and relates to the technical field of cast magnesium alloy. The preparation method of the Mg-Zr intermediate alloy comprises the following steps: preparing a Mg-Zr alloy melt with a Zr content of 10-20wt%; subjecting the Mg-Zr alloy melt to mechanical force stirring at 50-100rpm; cooling and forming the Mg-Zr alloy melt after filtering through a ceramic filter block to obtain a Mg-Zr alloy ingot; and subjecting the Mg-Zr alloy ingot to solid solution treatment to obtain the Mg-Zr intermediate alloy. The Mg-Zr intermediate alloy prepared by the preparation method can improve the problems of the current Mg-Zr intermediate alloy, such as coarse Zr particles, high agglomeration ratio, and many inclusions, and can achieve the effects of slag removal and Zr particle reduction of the Mg-Zr intermediate alloy, so as to significantly improve the refining effect of Zr on the magnesium alloy.

The present application relates to the field of non-ferrous alloy design and additive manufacturing technology and metal stamping technology, and particularly relates to a super-fine-grained Mg-Bi-Al-Ti-Zr alloy obtained by 3D printing and extrusion technology and a preparation process thereof. The Mg-Bi-Al-Ti-Zr alloy comprises Bi: 1.0-3.0 wt%, Al: 1.0-2.0 wt%, Ti: 0.5-1.0 wt%, Zr: 0.5-1.0 wt%, and the balance of Mg and inevitable impurity elements. The present application designs a new Mg-Bi-Al-Ti-Zr alloy, refines the grains by adding trace alloy elements, and is not prone to forming coarse second phases. Meanwhile, the added alloy elements are suitable for printing technology and have the characteristics of oxidation resistance. The super-fine-grained Mg-Bi-Al-Ti-Zr alloy and the preparation process thereof can be obtained by 3D printing and extrusion processing technology, and have excellent mechanical properties.