59 results about "Zr element" patented technology

The present invention relates to the technical field of other processing of metals. Disclosed are a free-machining titanium material and a preparation process therefor. The free-machining titanium material comprises: a matrix component group and free-machining component groups, wherein at least one of the free-machining component groups is added to the matrix component group; the matrix component group comprises the following components in percentage by mass: 0-1.0% of Fe, 0-0.08% of N, 0-0.02% of H, 0-0.50% of O, 0-8.0% of Al, 0-15.0% of V, and the balance being titanium and inevitable impurities; and the free-machining component groups are an RE element and S element group, a Cu element and S element group, a Zr element group, a C element group, a B element group, and an Mg element group, respectively. The preparation process involves producing the described free-machining titanium material by using any one of the following three methods: vacuum arc remelting, vacuum floating melting, and powder metallurgy. The present invention solves the technical problem of how to further improve the machinability of titanium materials.

The invention discloses a method for refining a rare earth magnesium alloy structure through combination of composite Zr salt and an ultrasonic field, the composite Zr salt is added as a chemical refiner in the magnesium alloy smelting process, and low-temperature ultrasonic treatment is carried out before pouring. Low-temperature chemical refinement and physical refinement are combined, the composite Zr salt is adopted to replace a traditional Mg-Zr intermediate alloy to serve as a chemical refiner, the refinement cost is reduced, magnesium element oxidation burning loss is avoided, on the basis, an ultrasonic physical field is introduced before melt pouring, Zr element sedimentation and decline effects are effectively avoided, and the mechanical property of the alloy is improved. The yield of Zr particles and the nucleation rate of crystal grains are increased, the Zr particles can play a nucleation role, and the effects of refining the solidification structure of the rare earth magnesium alloy and purifying the melt are achieved, so that the comprehensive mechanical property of the rare earth magnesium alloy is improved, and the rare earth magnesium alloy is suitable for the aerospace field with strict requirements for light weight, high specific strength and high temperature resistance.

The invention provides a Cu-Ti alloy and a preparation method thereof. The Cu-Ti alloy comprises the following components in percentage by mass: 3.0-3.5 wt% of Ti element, less than or equal to 0.05 wt% of B element, less than or equal to 0.05 wt% of Zr element and the balance of Cu element, the Cu-Ti alloy comprises a beta '-Cu4Ti precipitation phase with the size being 3 nm to 7 nm, a beta'-Cu4Ti precipitation phase with the size being 8 nm to 12 nm and a beta '-Cu4Ti precipitation phase with the size being 13 nm to 20 nm. The precipitated phases comprise microstructures with the size ranges of 3-7 nm, 8-12 nm and 13-20 nm, the microstructures jointly act on an alloy matrix, the strength, plasticity and conductivity of the Cu-Ti alloy material are remarkably improved, and therefore the problem that the Cu-Ti alloy material is difficult to give consideration to excellent strength, conductivity and plasticity at the same time is solved.

The invention discloses a method for improving creep resistance of a rare earth magnesium alloy, which comprises the following steps: S1, casting an ingot blank according to the mass percent of each component (0-6% of Y element, 1-3% of Nd element, 0.1-0.5% of Zr element and the balance of Mg element) in the rare earth magnesium alloy; s2, the ingot blank is subjected to solution treatment; s3, the material obtained after solution treatment is subjected to rolling deformation, the rolling deformation temperature ranges from 450 DEG C to 520 DEG C, the reduction rate ranges from 15% to 25%, and the roller linear speed ranges from 2 mm / s to 200 mm / s; and S4, the rolled and deformed material is subjected to aging treatment, the aging treatment temperature ranges from 180 DEG C to 260 DEG C, and the aging treatment time ranges from 5 h to 70 h. According to the method disclosed by the invention, an originally harmful and unavoidable precipitation-free zone formed along a grain boundary is converted into a precipitation-free zone which is beneficial to creep resistance and is uniformly distributed along an intragranular deformation zone, and the creep resistance is remarkably improved.

The invention provides a synergistically modified Cu-Ti alloy and a preparation method thereof. The synergistic modified Cu-Ti alloy comprises the following components in percentage by mass: 3.0-3.5 wt% of a Ti element, less than or equal to 0.01 wt% of a B element, less than or equal to 0.01 wt% of a Zr element and the balance of a Cu element, wherein the synergistic modified Cu-Ti alloy comprises a beta '-Cu4Ti precipitated phase with the size of 3 to 5 nm, a beta'-Cu4Ti precipitated phase with the size of 6 to 15 nm and a beta '-Cu4Ti precipitated phase with the size of 16 to 26 nm. The multi-scale precipitation phases jointly act on an alloy matrix, so that the strength, plasticity and conductivity of the synergistically modified Cu-Ti alloy material are remarkably improved.

The application provides a method for determining the content of Zr metal ions in a high-purity volatile organic matrix environment by ICP-MS, comprising the following steps: (1) based on the volatile nature of the organic matrix, replacing the sampling system and debugging the instrument parameters; (2) acidifying the volatile organic matrix to be tested; (3) testing on the machine; (4) according to the generated standard curve, reading out the content of the metal ion Zr in the high-purity reagent IPA. The method directly and effectively improves the problem that the direct sampling ICP-MS cannot pull out the Zr element standard curve and thus cannot read out the content of Zr in IPA; meanwhile, the pretreatment method of the method is an acidification method, which is simple to operate and low in time cost; and the standard addition method can eliminate the matrix interference, realize the detection of the metal ion Zr under the high-purity matrix, and meet the production demand.

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 application provides a copper-based alloy material and a preparation method and application thereof, and belongs to the technical field of copper-based alloy materials.The copper-based alloy material comprises Ag elements, Zr elements, Cu elements and inevitable impurity elements; the weight content of the Ag elements is 0.001-0.045%, the weight content of the Zr elements is 0.001-0.01%, the total weight content of the inevitable impurity elements is less than or equal to 0.001%, and the balance is the Cu elements.The application limits the content of the Ag elements, the Zr elements and the inevitable impurity elements in the copper-based alloy material, not only further improves the softening resistance of the copper-based alloy material, but also simultaneously makes the electric conductivity and the hardness of the copper-based alloy material in a better range, realizes the comprehensive improvement of the performance of the copper-based alloy material.In addition, the control of the content of the above elements in the copper-based alloy material also realizes the control of the cost of the copper-based alloy material, and ensures the maximization of the economic benefits of the copper-based alloy material.

This invention discloses a high-strength, high-toughness Al-Mg-Si alloy, belonging to the field of high-strength, high-toughness aluminum alloy preparation technology. This invention optimizes the alloy composition by adding Cu, Mn, Sc, and Zr elements, and combines this with vacuum melting, homogenization treatment, asymmetric hot extrusion, solution treatment, pre-strain treatment, and three-stage aging treatment processes to synergistically achieve a significant improvement in the strength and toughness of the aluminum alloy. Compared with conventional high-strength, high-toughness aluminum alloy production, the addition of Cu, Sc, Zr, and Mn elements, and the use of asymmetric hot extrusion + solution treatment + pre-strain treatment + three-stage aging treatment processes, results in a significant increase in both strength and toughness through the synergistic effects of grain refinement strengthening, dislocation strengthening, deformation strengthening, and second-phase strengthening. This ensures that the aluminum alloy achieves improved strength and toughness simultaneously, guaranteeing the overall performance of the finished product.

The present invention relates to a Zr-based Cr / P-free composition for treating a metal surface, comprising: (A) a source of hexafluorozirconate ions; (B) Zn cations; (C) Mg cations; and (D) at least one corrosion inhibitor selected from the group consisting of a propargyl alcohol alkoxy compound and its derivatives, a thiodiglycol ethoxylate and its derivatives, and combinations thereof; wherein the pH value of the composition is in the range of from 3.5 to 6.5, and the concentration of the component (A) calculated on the basis of Zr element is higher than 5 ppm, based on the total weight of the Zr-based Cr / P-free composition. The present invention also relates to a process for treating a metal surface with the composition, and a substrate containing a metal surface treated by the process.

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.

A high-strength, low-density Fe-Ni-based high-entropy superalloy with spherical γ′ coherent reinforcement and its preparation method are disclosed. Belonging to the field of high-entropy superalloys, the alloy comprises Fe, Ni, Co, Al, Ti, Nb, Cr, Mo, C, B, and Zr elements. The mass percentages of the alloy composition are as follows: Ni: 29.8–33.2, Co: 13.3–16.7, Al: 2.7–3.1, Ti: 2.1–3.3, Nb: 1.0–2.1, Cr: 12.0–13.9, Mo: 1.4–1.7, C: 0.01–0.03, B: 0.005–0.015, Zr: 0.02–0.03, Fe: balance. The atomic percentage of Al / (Ti+Nb) is 1–2, and the atomic ratio of Cr / Mo is 15:1. This invention achieves coherent precipitation of spherical γ′ nanoparticles on a γ matrix through alloy composition design. The γ′ nanoparticles remain stable at 750℃ for extended periods, resulting in an alloy with excellent mechanical properties and processing deformability. Its room temperature yield strength exceeds 820 MPa, room temperature elongation exceeds 20%, and its yield strength at 700℃ exceeds 710 MPa. Furthermore, the high Fe content effectively reduces the alloy's cost, the preparation process is simple, and the density is below 7.80 g / cm³. 3 It is a high-strength, low-density Fe-Ni based high-entropy superalloy.

The invention relates to a DPC active crystallization aluminum alloy online zirconium adding method based on a proton diffuser, and belongs to the technical field of aluminum alloys. The method comprises the following steps: continuously adding an AlZr5 aluminum-zirconium alloy wire into flowing molten aluminum at the front section of a degassing process of an aluminum alloy smelting process, and meanwhile, acting on the aluminum-zirconium alloy wire by utilizing a high-frequency mechanical vibration energy field generated by a proton diffuser and transferring the aluminum-zirconium alloy wire to the molten aluminum, so as to promote the aluminum-zirconium wire to be quickly dissolved and accelerate Zr atom diffusion. By controlling the parameters such as the vibration frequency of 50-500Hz, the amplitude of 0.5-1.0 mm, the temperature of molten aluminum of 700 + / -15 DEG C and the like, the zirconium poisoning interface reaction of Zr and elements such as Ti, B, Fe, Si and the like is fundamentally inhibited. According to the method, low-temperature rapid dissolution and efficient and uniform distribution of the Zr element are achieved, the grain size of the aluminum alloy is refined to be smaller than or equal to 80 micrometers, the tensile strength, the ductility and the conductivity of the aluminum alloy are remarkably improved, and the method has the advantages of being low in cost, wide in applicability and easy to industrially apply.

The invention provides a magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following elements in percentage by mass: 2.0 to 4.5 percent of Zn element, 1.0 to 2.5 percent of Sm element, 0.5 to 1.5 percent of Cu element, 0.1 to 0.6 percent of Ce element, 0.1 to 0.5 percent of A element, less than or equal to 0.15 percent of inevitable impurities and the balance of Mg element, wherein the element A is selected from any one or more of Ca element, Sr element and Zr element; the heat conductivity of the magnesium alloy ranges from 130 W / (m.K) to 142 W / (m.K), the tensile strength ranges from 260 MPa to 285 MPa, the yield strength ranges from 150 MPa to 170 MPa, and the ductility ranges from 10% to 15%. The magnesium alloy disclosed by the invention has relatively high heat conductivity and relatively high strength, so that the requirement of a high-power integrated light-weight electronic component heat dissipation piece is met.

The invention discloses a graphene aluminum-based composite enameled wire and a preparation method thereof, and belongs to the technical field of metal-based composites.The preparation method comprises the steps that firstly, Cu-rGO anchored by copper nanoparticles is prepared; secondly, carrying out hydroxylation and sulfhydrylation surface modification on the aluminum powder; then, Cu-rGO, zirconium-aluminum alloy powder and the modified aluminum powder are mixed, and a reinforcement is evenly anchored on the surface of the aluminum powder through the S-Cu specific coordination effect; and finally, carrying out vacuum hot pressed sintering, hot extrusion, cold drawing and painting. According to the preparation method, the strategy of first coordination anchoring and then in-situ interface reconstruction is adopted, in the high-temperature sintering process, a chemically-bonded gradient transition interface is formed, and the wettability and combination problems of graphene and an aluminum matrix are solved; and meanwhile, the Zr element in the zirconium-aluminum alloy is subjected to in-situ precipitation in the aluminum matrix through solid diffusion to form an Al3Zr reinforced phase which is dispersively distributed, the phase can effectively pin the grain boundary, and the high-temperature creep resistance of the material is remarkably improved.

The invention belongs to the technical field of soluble magnesium alloy rods, and discloses a soluble magnesium alloy rod with enhanced elongation, and the magnesium alloy rod comprises the following chemical components in percentage by mass: 1.5%-14.5% of Gd element, 0.5%-4.0% of Y element, 0.1%-2.5% of Zn element, 0.2%-0.5% of Zr element, 0.01%-0.5% of Li element, 0.01%-0.6% of Ni element, 0.01%-0.5% of Ga element, 0.01%-0.5% of In element, 0.1%-2.0% of Cu element and the balance of Mg element. In component design, various elements are scientifically proportioned, the proportion of Gd to Y and the proportion of Zn to Zr are just right, specific elements are added to form a composite structure, the ductility is improved, the dissolution rate and strength are balanced by means of the Cu element, in the performance aspect, dissolution is accelerated at the high temperature of 200 DEG C, the dissolution rate is increased by 10%-15% compared with the room temperature, the degradation period can be shortened, a dissolved product is fine and uniform, and the degradation rate is high. The biocompatibility and environmental friendliness are excellent, the application field is wide, and degradable medical instruments are covered.

The present application relates to the technical field of aluminum alloy processing, and particularly relates to a method for reducing coarse grain ring of 2219 aluminum alloy extruded rod by preheating treatment, the composition of the 2219 aluminum alloy is as follows: Si≤0.20%; Fe≤0.30%; Cu 5.8~6.8%; Mn 0.20~0.25%; Mg≤0.02%; Zn≤0.10%; Ti 0.02~0.10%; Zr 0.1~0.13%; V 0.07~0.10%, and the rest is Al and some inevitable impurity elements; the present application adds a preheating treatment process with a temperature lower than the solid solution temperature before solid solution quenching, the preheating treatment process is to slowly heat the rod to 380~480 DEG C at a heating rate of 5-8 DEG C / h, keep warm for 3-8 h, and cool to room temperature in the furnace. Under the premise of reducing the addition amount of Mn and Zr elements, the added preheating treatment process can reduce the distortion energy accumulated in the deformation process of the extruded rod, reduce the recrystallization power, achieve the purpose of reducing the coarse grain ring of the 2219 aluminum alloy extruded rod, and avoid the element segregation caused by Mn and Zr elements, thus reducing the material rejection rate, and improving the production efficiency.

The invention discloses a laser cladding C / C composite material Si / SiC / ZrSi2 gradient coating and a preparation method thereof, and belongs to the technical field of anti-oxidation coatings. The material comprises a C / C composite material matrix and a Si / SiC / ZrSi2 gradient coating prepared on the surface of the C / C composite material matrix through three times of laser cladding; wherein the Si / SiC / ZrSi2 gradient coating is prepared from a Si / C composite inner coating and a ZrSi2 outer coating through laser remelting; the distribution of the Zr element in the Si / SiC / ZrSi2 gradient coating is gradually increased from the surface of the C / C composite material matrix to the outside, and the distribution of the Si element in the Si / SiC / ZrSi2 gradient coating is gradually thinned from the surface of the C / C composite material matrix to the outside; the Si / C composite inner coating is prepared from Si / C composite powder through laser cladding; and the ZrSi2 outer coating is prepared by carrying out laser cladding on ZrSi2 powder. The method is used for solving the technical problems that an existing preparation method is complex in process, the intrinsic performance of the C / C composite material is damaged, and the coating performance is poor.

The present application relates to a kind of high-strength steel of anti-fatigue and crack arrest and its preparation method, it relates to metal material technical field, it is by the following chemical components by mass percentage composition: C:0.029-0.079%, Si:0.09-0.29%, Mn:1.41-1.69%, Nb:0.019-0.029%, Zr:0.0041-0.0199%, Mg:0.0014-0.0199%, the rest is Fe and inevitable impurity;Zr element and Mg element mass percentage also simultaneously satisfy formula: 0.0041%<Zr+Mg<0.0199%, and Zr / Mg=1-3.The high-strength steel plate of the present application adopts low-carbon, low-silicon, middle-manganese inexpensive chemical composition design, does not contain Cr, Ni, Cu and other valuable metal elements, substantially reduces material cost;The present application does not use traditional Al deoxidation technology, instead is Si-Mn initial deoxidation, Zr-Mg final composite deoxidation, forms small, dispersed and uniform composite oxysulfide, substantially improves plasticity and toughness, significantly improves anti-fatigue performance, is suitable for the high-strength steel of anti-fatigue performance requirement high offshore wind power equipment equipment.

The invention discloses a rare earth zirconium-based amorphous alloy and a preparation method and application thereof. The preparation method of the rare earth zirconium-based amorphous alloy comprises the following steps: 1) providing required alloy raw materials according to the chemical composition of the rare earth zirconium-based amorphous alloy; the chemical composition of the rare earth zirconium-based amorphous alloy is (Zr < 100-a-b-c-d > Cu Al N < c > M < d >)-xRE, (2) according to the chemical composition of the ZrRE intermediate alloy, raw materials of all Zr elements and raw materials of part of RE elements are subjected to vacuum casting and cooling, and the ZrRE intermediate alloy is obtained; the chemical composition of the ZrRE intermediate alloy is Zr < 100-e > RE < e >; (3) smelting the ZrRE intermediate alloy, the raw materials of the rest RE element and the raw materials of other elements, and cooling to obtain a rare earth zirconium-based amorphous alloy master ingot; and 4) casting the rare earth zirconium-based amorphous alloy mother ingot to obtain the rare earth zirconium-based amorphous alloy. The prepared rare earth zirconium-based amorphous alloy is low in oxygen content, high in compression strength and excellent in industrial machinable capacity.

According to the Cu-Cr-X alloy contact wire, Zr element replacement is achieved, working procedures and use of expensive alloy elements are reduced, low-cost manufacturing of the alloy contact wire is achieved, and the consistency of the product quality of the contact wire is ensured. The components forming the alloy contact wire body comprise Cu, Cr, X and inevitable impurities, the content of Cr ranges from 0.3 wt% to 0.6 wt%, X is one or a mixture of Ti and Si, the content of the inevitable impurities is smaller than 0.3 wt%, and the balance is copper.

The application provides a method for improving the room temperature / high temperature strength and high temperature durability of a 3D printed aluminum alloy, by adding at least one of La, Ce, Er, Ti and Zr elements in the alloy material, on the one hand, primary Al 11 La3, Al3Ti, Al3Zr second phase particles play the role of heterogeneous nucleation, promote the formation of equiaxed grains in the printing process, reduce the formation of columnar grains, and achieve the effect of refining grains; on the other hand, the secondary nano Al 11 La3, AlCe, Al3Er phase has good thermal stability, can produce dispersion strengthening and improve the high temperature structure stability. Under the action of primary and secondary second phases, the dislocation movement is inhibited, the structure stability is improved, and finally the room temperature / high temperature tensile strength, yield strength and high temperature durability are improved.

This invention relates to a rare-earth permanent magnet material Sm2(Co,Fe,Cu,Zr). 17 The method for preparing the permanent magnet material, wherein the chemical formula of the permanent magnet material is Sm2Co. 17‑a‑b‑c Fe a Cu b Zr c Where 0.15≤a≤0.35, 0.05≤b≤0.15, 0.02≤c≤0.05, and a+b+c≤0.50; the permanent magnet material has a 2:17 rhombohedral crystal structure with space group R-3m and an average grain size of 3-8μm; the preparation method includes vacuum melting, homogenization treatment, powder preparation, magnetic field orientation forming, cold isostatic pressing, sintering, and graded aging treatment steps. This invention improves the coercivity and maximum energy product of the permanent magnet material and enhances its temperature stability by optimizing the Fe, Cu, and Zr element ratio and introducing a multi-stage heat treatment process.

The invention relates to high-plasticity high-silicon silicon steel and a preparation method and application thereof, and belongs to the technical field of soft magnetic material manufacturing. The high-plasticity high-silicon silicon steel comprises the following chemical components: 3.5-6.6% of Si, 0.5-2.0% of Al, 0.02-0.1% of B, 0.03-0.06% of Zr, 0.1-0.5% of Mn, less than or equal to 0.005% of C, less than or equal to 0.003% of S, less than or equal to 0.004% of P, less than or equal to 0.003% of N, less than or equal to 0.003% of O and the balance of Fe and inevitable impurities. Through mutual cooperation of the elements, especially the addition of the B and Zr elements, grains are refined, the content of ordered phases is reduced, the plasticity of the high-silicon silicon steel is improved, and the obtained high-silicon silicon steel does not have brittle fracture; and meanwhile, the high-silicon silicon steel with high magnetic induction intensity, low iron loss and excellent thickness tolerance and surface quality is obtained.

The invention belongs to the field of ceramic cutting tool materials, and particularly relates to a complex-phase Ti (C, N)-based ceramic material with a double-solid-solution microstructure and a preparation method of the complex-phase Ti (C, N)-based ceramic material. The prepared ceramic material is prepared by taking Ti (C, N) as a matrix and adding ZrC, NbC and Mo2C as reinforcing phases through spark plasma sintering. The addition of ZrC induces the formation of a (Ti, Zr, Nb) (C, N) second solid solution phase rich in Zr elements; the dispersed distribution of the (Ti, Zr, Nb) (C, N) second solid solution phase in the crystal and at the crystal boundary can effectively pinning the crystal boundary, inhibit the abnormal growth of the crystal grains in the sintering process, realize the spanning from a single solid solution to the multiphase ceramic, obviously improve the bending strength, hardness and wear resistance of the Ti (C, N)-based ceramic material, and greatly improve the service life of the ceramic material. And irreplaceable importance is shown in the fields of cutter materials, precision machining and the like.

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 application provides a cast rare earth magnesium alloy and a preparation method thereof, and relates to the technical field of magnesium alloys. The cast rare earth magnesium alloy comprises the following elements in percentage by mass: the content of Gd element is 4.5-6.50%, the content of Y element is 0.5-2.0%, the content of Nd element is 0.05-1.2%, the content of Er element is 0.05-0.5%, the content of Zn element is 0.3-1.2%, the content of Zr element is 0.3-0.6%, the total content of unavoidable impurities is less than or equal to 0.1%, the content of single impurity is less than 0.05%, and the balance is Mg element. In the application, the addition of Gd element, Y element, Nd element and Er element can weaken the basal texture of the magnesium alloy and improve the plasticity. Controlling the content of each element in the above range is helpful to improve the interaction between the elements, thereby helping the magnesium alloy to realize good strength-plasticity synergy.

The invention discloses a production method for solving the bending and twisting defect of a 6082 aluminum alloy profile, which comprises the following steps: accurately controlling Mn + Cr = 0.70-0.80%, homogenizing to promote the refinement of a dispersed phase (Al (Mn, Cr) FeSi phase is less than or equal to 1 mu m), homogenizing to eliminate dendritic segregation, reducing the risk of tail shrinkage and cracks, and adding Zr element and Ti element to form nanoscale Al3Zr / Al3Ti particles, so that the bending and twisting defect of the 6082 aluminum alloy profile can be overcome, and the bending and twisting defect of the 6082 aluminum alloy profile can be overcome. The growth of recrystallized grains is further inhibited; besides, by adding a covering agent and a refining agent, the bending and twisting defects can be reduced, through a cold air-water mist composite cooling mode, symmetric cooling is strengthened by combining a side face high-pressure air pipe, thermal stress asymmetry is reduced, the temperature of a discharging opening is controlled, coarse phase precipitation is restrained, and the aluminum alloy profile with excellent mechanical performance can be obtained on the whole; and the bending and twisting defect of the 6082 aluminum alloy profile is effectively overcome, the percent of pass is high, consumption of raw materials is reduced, and then the production cost is reduced.

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a preparation method of an AB2 type titanium-manganese series hydrogen storage alloy. According to the method, at least one AB-type intermediate alloy is prepared from an elemental raw material of at least one A-side metal element and an elemental raw material of at least one B-side metal element of the AB2-type titanium-manganese hydrogen storage alloy, the A-side metal element comprises a Ti element and / or a Zr element, and the B-side metal element comprises a Cr element and / or an Mn element; and preparing the AB2 type titanium-manganese hydrogen storage alloy from the at least one AB type intermediate alloy and other metal raw materials for preparing the AB2 type titanium-manganese hydrogen storage alloy. According to the preparation method of the AB2 type titanium-manganese series hydrogen storage alloy, the metal burning loss can be remarkably reduced, and meanwhile the hydrogen storage performance of the AB2 type titanium-manganese series hydrogen storage alloy is improved.