210 results about "Niobium-titanium" patented technology

The invention provides a niobium-titanium composite micro-alloyed hotrolled deformed bar which comprises the following chemical components: 0.15-0.25wt% of C, 0.30-0.60wt% of Si, 1.20-1.60wt% of Mn, 0.010-0.040wt% of Ti, 0.010-0.025wt% of Nb, less than or equal to 0.030wt% of P, less than or equal to 0.030wt% of S and the balance of Fe and inevitable impurities. According to the invention, the hotrolled deformed bar is produced by utilizing a niobium-titanium composite micro-alloying process, thus the addition of microalloy can be reduced, the production cost can be effectively lowered, and the produce market competitiveness can be improved.

The invention relates to a corrosion resistant niobium-titanium alloy, and a method for manufacturing plates and pipes with the corrosion resistant niobium-titanium alloy, wherein the corrosion resistant niobium-titanium alloy contains the following components by weight: 0.1-4.9% o Nb, not more than 0.08% of C, not more than 0.03% of N, not more than 0.012% of H, not more than 0.1% of O, not morethan 0.1% of Fe, and the balance of Ti. In Ti-(0.8-6%) Nb alloy pipes disclosed by the invention, titanium is as a matrix; little niobium is added; mechanical property of the niobium is improved by asolid-solution strengthening way; shearing strength and tensile strength of the alloy are higher than pure titanium; the tensile strength is increased by 10-20%; good plasticity and formability are kept; cold working performance is excellent; the niobium is added to further increase corrosion resistance of titanium and enlarge corrosion resistant range of titanium, so that the corrosion resistantniobium-titanium alloy is a good easily-formed corrosion resistant material.

The refractive index of a titanium oxide layer is modified by adding an impurity (e.g., niobium (Nb)) thereto within a range where good electrical conductivity is obtained. The Group III nitride-based compound semiconductor light-emitting device of the invention includes a sapphire substrate, an aluminum nitride (AlN) buffer layer, an n-contact layer, an n-cladding layer, a multiple quantum well layer (emission wavelength: 470 nm), a p-cladding layer, and a p-contact layer. On the p-contact layer is provided a transparent electrode made of niobium titanium oxide and having an embossment. An electrode is provided on the n-contact layer. An electrode pad is provided on a portion of the transparent electrode. Since the transparent electrode is formed from titanium oxide containing 3% niobium, the refractive index with respect to light (wavelength: 470 nm) becomes almost equal to that of the p-contact layer. Thus, the total reflection at the interface between the p-contact layer and the transparent electrode can be avoided to the smallest possible extent. In addition, by virtue of the embossment, light extraction performance is increased by 30%.

The invention discloses a low temperature superconducting assembly with low joint resistance for a high temperature superconducting current lead cold end. The resistance of a 40-70kA high temperature superconducting super current lead of which the lower end is connected with a low temperature superconducting bus must be as low as 1 nano-ohm. A rectangular section niobium-titanium/copper superconducting wire or a high conductivity copper material and a paired box type joint structure connected with the superconducting bus are adopted in the low temperature superconducting assembly. Tests prove that the joint resistance of the low temperature superconducting assembly and a high temperature superconducting assembly can be as low as 0.5 nano-ohm, and the joint resistance of the superconducting bus is lower than 1 nano-ohm. The low temperature superconducting assembly is a middle result for developing super current leads of an international thermonuclear fusion test reactor and has the characteristics of novel conception and low manufacturing cost.

The invention pertains to the field of powder metallurgy technology, in particular to a preparation method of high-niobium titanium aluminum alloy powder. The raw material adopts a casting-state high-niobium titanium aluminum alloy cast ingot, the process comprises: melting - soaking treatment - turning - machining into a rod which can be connected - continuous inert gas atomization method by induction heating without a crucible, the preparation method comprises the specific steps of: (1) melting by adopting the plasma cooling bed process; (2) carrying out the soaking treatment by keeping the temperature at 1100 to 1300 DEG C for 24 to 48 hours; then removing the oxide scale on the surface of the cast ingot; (3) adopting the wire cutting and machining methods to process the cast ingot into the rod which has thread connection, the diameter of 20 to 25mm and the length of 200 to 500mm, and then carrying out turning to remove the oxide scale on the surface of the rod; (4) adopting the continuous inert gas atomization process by induction heating without the crucible to process the rod into the powder, and the process parameters are that the pressure of the inert gas is 2.0 to 5.0MPa and the argon gas flow rate is 160 to 220Ls <-1>. The preparation method has the advantages of excellent degree of sphericity of the prepared powder, high purity, great mobility and high yielding rate of the powder. The degree of sphericity of the prepared powder achieves 80 to 95 percent, and the yielding rate of the powder is 75 to 85 percent.

The invention provides a constant-tension winding machine for niobium titanium-copper superconducting solenoid coils, relating to a winding machine for superconducting solenoid coils. The invention solves the problems of complex winding process, high labor intensity of operators and low use ratio of equipment space of the current winding machine for superconducting solenoid coils. In the invention, an L-shaped portal frame is provided with two first slider linear guide rails and a first ball screw, and a double-track pulley is installed on a wiring arm. A wiring support arm of the wiring arm is provided with a wiring pulley, and a wire loading support arm of the wiring arm is provided with a wire loading pulley. A movable pulley is installed on a movable pulley axis support, and a wire loading tray is rotatably installed on a wire loading support. A superconducting solenoid coil to be wound is rotatably installed on a winding support, and a lead wire is led out through the wire loading tray and wound on the superconducting solenoid coil to be wound after moving round the wire loading pulley, one slideway of the double-track pulley, the movable pulley, the other slideway of the double-track pulley and the wiring pulley. The constant-tension winding machine is suitable for winding niobium titanium-copper superconducting solenoid coils.

The invention provides niobium-titanium films, coatings (e.g., low-emissivity coatings) comprising one or more niobium-titanium films, and substrates bearings such coatings. Methods of depositing niobium-titanium films are also provided.

The invention relates to a titanium dioxide/niobium-titanium oxide composite material as well as the preparation and application thereof, and belongs to the field of lithium ion batteries. According to the titanium dioxide/niobium-titanium oxide composite material, anatase type titanium dioxide particles are distributed on the surface of a spherical amorphous niobium-titanium oxide, and the amorphous niobium-titanium oxide is a compound with the general formula of TixNbyO2x+2.5y, wherein x ranges from 0.1 to 1, and y ranges from 1 to 2. The composite material adopts the subcritical solvothermal method, and the synthesis and recombination of components of the composite material are completed synchronously, so as to ensure good dispersity and interfacial compatibility of the system. The composite material has both the advantage of high bulk density of the micron-scale spherical electrode material and the advantage of short lithium ion diffusion distance of a nanometer material, so that the composite material achieves excellent electrochemical activity.

The invention provides a smelting method for a high-Nb-TiAl based alloy. According to the smelting method, titanium sponge, a niobium-titanium alloy and aluminum shots are used as raw materials and are pressed and welded to form a consumable electrode; the consumable electrode is smelted in a vacuum consumable electric arc furnace to obtain the high-Nb-TiAl based alloy. According to the smelting method, an electrode block is prepared by a manner of combining material mixing and material distribution; the vacuum consumable electric arc furnace is used for carrying out three times of smelting; after the materials are discharged from the furnace, the materials are slowly cooled by adopting a manner of sand burying treatment or annealing treatment so that the high-Nb-TiAl based alloy with uniformly-distributed components and no cracks can be obtained. The smelting method for the high-Nb-TiAl based alloy is simple in method and strong in maneuverability; with the adoption of the method, the high-Nb-TiAl based alloy with the uniformly-distributed components and no segregation or impurities can be produced.

The invention discloses a vertical graphene/niobium-titanium-oxygen/sulfur-carbon composite material with a three-dimensional porous array structure and a preparation method and application of vertical graphene/niobium-titanium-oxygen/sulfur-carbon composite material. The method comprises the steps of vertically growing a graphene nanosheet on a substrate in an intertwining manner; forming a VG/TiNb2O7 nanosheet by TiNb2O7 coating the graphene nanosheet; and forming a VG/TiNb2O7@S-C three-dimensional porous array by a sulfur-doped carbon layer coating the VG/TiNb2O7 nanosheet. According to thepreparation method, a VG/TiNb2O7 nanoarray is reversely synthesized; and the composite material is prepared by using the VG/TiNb2O7 nanoarray as a carrier through constant-current anodic deposition.The composite material disclosed by the invention has the characteristics of high cycling stability, high rate capability, coulombic efficiency and the like and is capable of significantly improving the energy density/power density and the cycling stability of a total battery when matched with lithium iron phosphate or a ternary material. The novel composite material disclosed by the invention issuitable for being used as a negative electrode material for a lithium-ion battery and can be applied to various electronic devices, electric vehicles and hybrid vehicles.

According to one embodiment, there is provided an active material including monoclinic niobium titanium composite oxide particles and a carbon material layer. The monoclinic niobium titanium composite oxide particles can absorb and release Li ions or Na ions and satisfy Formula (1) below. The carbon material layer covers at least a part of surfaces of the niobium titanium composite oxide particles and satisfies Formula (2) below: 0.5≰(α/β)≰2  (1) 0≰(γ/σ)≰0.1  (2)

The invention discloses a kind of niobium-titanium microalloying HRB400-scale screw-thread steel and a manufacturing method thereof. The screw-thread steel comprises C, Si, Mn, P, S, Nb, Ti, N and the balance Fe and impurities. The manufacturing method of the niobium-titanium microalloying HRB400-scale screw-thread steel comprises the following steps of smelting in a revolving furnace, treatment outside the furnace, continuous casting, casting blank heating and rolling. During smelting in the revolving furnace, alloy such as silicomanganese and ferroniobium is added for niobium microalloying treatment. During treatment outside the furnace, argon is blown in an argon station, and refining is conducted in an LF furnace. In the process of refining in the LF furnace, a ferrotitanium core-spun yarn is fed for titanium microalloying treatment. According to the technical scheme, before tapping, alloy such as silicomanganese and ferroniobium is added for niobium microalloying treatment, the ferrotitanium core-spun yarn is fed in the process of refining in the LF furnace for titanium microalloying treatment, after titanium is fused into molten steel, proper niobium-titanium microalloying treatment is conducted, the yield of the niobium-titanium alloy is increased, and stable, sustainable and low-cost production of the screw-thread steel is achieved.

The invention discloses a 320MPa low-temperature resistant hot-rolled H-shaped steel and a preparation method thereof, the 320MPa low-temperature resistant hot-rolled H-shaped steel comprises the following chemical components by weight percent: 0.05-0.11% of C, 0.20-0.35% of Si, 1.05-1.30% of Mn, not more than 0.020% of P, not more than 0.015% of S, 0.020-0.035% of Nb, 0.005-0.025% of Ti, and the balanced of Fe and trace impurity. The production of the 320MPa low-temperature resistant hot-rolled H-shaped steel is realized by using niobium-titanium composite microalloying process through low-carbon content under the high hot-rolling temperature condition, the prepared low-temperature resistant steel is good in mechanical property, and the longitudinal impact is greater than 165J at -30 DEG C.

The invention discloses a preparation method of a NbTi superconducting joint and relates to a superconducting joint technology. The method comprises the steps of: a) preparing superconducting filaments by NbTi superconducting wires; b) twisting and weaving a plurality of the superconducting filaments together; c) inserting twisted ends of the superconducting filaments into a cold pressing tube in such a manner that the superconducting filaments extend out of the cold pressing tube from the other end; d) applying pressure to a straight section of the cold pressing tube to combine the superconducting filaments and the cold pressure tube together; e) placing the combined cold pressing tube into a copper sleeve and padding welding flux; and f) heating, cooling and solidly jointing at room temperature to obtain a finished product. The preparation method of the NbTi superconducting joint provided by the invention has the advantages of simple structure, simple and convenient preparation, and stable and reliable performance.

The invention discloses a non-pollution directional solidification method of a high-niobium titanium aluminum intermetallic compound and belongs to the technical field of high-niobium titanium aluminum intermetallic compound materials. The invention solves the problem in the prior art that the high-niobium titanium aluminum alloy is polluted and the dimension is small to reduce the performance of the high-niobium titanium aluminum alloy, and a problem of insufficient superheat degree of smelting the high-niobium titanium aluminum alloy affecting the performance of the high-niobium titanium aluminum alloy further exists in the prior art. The method comprises the following steps of: smelting the upper segment of a pedestal in an electromagnetic red copper crucible and the lower end of a feeding bar through an induction coil; after fused high-niobium titanium aluminum alloy liquid in the electromagnetic red copper crucible forms a hum, driving a pull rod to move downwards, a feeding motor is started, the feeding bar adds materials in the electromagnetic red copper crucible, a cooler provides strong cold to the smelted high-niobium titanium aluminum alloy to form the smelted high-niobium titanium aluminum alloy liquid to columnar crystals with directional solidification tissues; and processing and removing the polycrystalline layer of the columnar crystal high-niobium titanium aluminum alloy ingot to form a high-niobium titanium aluminum alloy ingot with directional solidification. The non-pollution directional solidification method provided by the invention is used for preparing columnar crystal high-niobium titanium aluminum alloy ingots.

The invention relates to a low-temperature ferrite LT-FH40 steel plate applied to hot-rolled ships. The steel plate comprises the following chemical components in percentage by mass: 0.04-0.09% of C, 0.10-0.30% of Si, 1.35-1.55% of Mn, smaller than or equal to 0.008% of P, smaller than or equal to 0.004% of S, 0.20-0.45% of Ni, 0.010-0.035% of Nb, 0.007-0.020% of Ti, 0.020-0.050% of Alt and the balance being Fe and inevitable impurities. Through cooperation of low-carbon and niobium-titanium alloying composition design, a low-phosphorus and low-sulfur smelting process and a reasonable controlled rolling and cooling process, the low-temperature ferrite LT-FH40 steel plate applied to hot-rolled ships is produced; the hot-rolled state mechanical performance meets the standard requirements. The requirement of low-temperature vessel steel applied to ships is successfully solvedmet by the method; the low-temperature ferrite LT-FH40 steel plate applied to hot-rolled ships can be produced by processes such as converter steelmaking and continuous casting and can be produced by a large number of steel enterprises; the low-temperature ferrite LT-FH40 steel plate applied to hot-rolled ships is produced by a TMCP process, so that the production cost is reduced.

According to one embodiment, there is provided an active material. The active material includes secondary particles. The secondary particles include first primary particles and second primary particles. The first primary particles include an orthorhombic Na-containing niobium-titanium composite oxide. The second primary particles include at least one selected from the group consisting of a carbon black, a graphite, a titanium nitride, a titanium carbide, a lithium titanate having a spinel structure, a titanium dioxide having an anatase structure, and a titanium dioxide having a rutile structure.