82results about How to "Promote solid solution" patented technology

The invention discloses a method for preparing a radioactive waste solidified body. The method is characterized by comprising the following steps of: finely grinding a raw material which comprises 9.53 to 29.41 weight percent of ZrSiO4, 23.36 to 32.12 weight percent of CaCO3, 31.07 to 38.46 weight percent of TiO2, 0 to 15.66 weight percent of Nd2O3, 0 to 29.09 weight percent of CeO2 and 0 to 3.97 weight percent of Al2O3; drying the raw material; and adding polyvinyl alcohol sol, granulating, screening, molding, discharging the sol, performing vacuum hot-pressing sintering, and thus obtaining the radioactive waste solidified body. By adoption of the method, the raw material is low in cost, a high-purity and high-density perovskite acorite and titanite combined mineral solidified body is prepared at low temperature by using a simple and practical hot-pressing sintering technology, and foundation is laid for engineering application to artificial rock solidification treatment of high-level waste.

A dielectric ceramic including a perovskite compound represented by the general formula {(Ba_1-x-yCa_xSn_y)_m(Ti_1-zZr_z)O₃} as a primary component in which the x, y, z, and m satisfy 0.02≦x≦0.20, 0.02≦y≦0.20, 0≦z≦0.05, and 0.99≦m≦1.1 and is processed by a thermal treatment at a low oxygen partial pressure of 1.0×10⁻¹⁰ to 1.0×10⁻¹² MPa. Accordingly, there are provided a dielectric ceramic which can be stably used in a high-temperature atmosphere without degrading dielectric properties, properties of which can be easily adjusted, and which generates no electrode breakage even when ceramic layers and conductive films are co-fired, and a ceramic electronic element, such as a multilayer ceramic capacitor, which uses the above dielectric ceramic.

The invention relates to a tungsten alloy and a preparation method thereof. The alloy is composed of a tungsten matrix and alloy elements. The solid solution of alloying elements into the tungsten matrix, based on the XRD test, can give full play to the solid solution strengthening effect, improve the strength and hardness of the alloy, and improve the plasticity and toughness of the alloy at the same time. The invention also provides a 3D pure shape preparation method of this novel tungsten alloy part.

The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a 5182-0 aluminum alloy sheet preparation method for automobiles. Aluminum alloy raw materials are preparedfrom the components in percentage by mass: namely 0.01-0.08% of Si, 0.15-0.30% of Fe, 0.01-0.1% of Cu, 0.10-0.30% of Mn, 4.5-5.0% of Mg, less than or equal to 0.1% of Cr, less than or equal to 0.05%of Zn, less than or equal to 0.1% of Ti, less than or equal to 0.1% of Ni, less than or equal to 0.05% of a single impurity, less than or equal to 0.15% of total, and the balance of Al. Aluminum alloycoils cold rolled to intermediate pass in cold rolling process are annealed and insulated at 320 DEG C for 2 h, wherein the annealing process of finished aluminum alloy coils is passed in a single layer mode in a continuous air cushion annealing furnace, the coils are blown to suspend in the furnace through hot air, and the problems that most parts of the local deformation of aluminum alloy sheets are cracked during the stamping deformation due to the uneven inner grain structure of aluminum alloy sheets prepared by existing aluminum alloy sheet preparation process are solved.

The invention relates to the technical field of copper alloys, and in particular to an elastic copper-titanium alloy and a preparation method thereof. The preparation method of the elastic copper-titanium alloy comprises the steps of melting and casting metal raw materials to obtain an ingot according to the composition of the elastic copper-titanium alloy; and sequentially performing hot rolling,first cold rolling, solution treatment, third cold rolling, second aging treatment and annealing treatment on the ingot to obtain the elastic copper-titanium alloy. The elastic copper-titanium alloyis prepared from the components in percentage by mass: Ti: 2.4% to 3.5%; Cr: 0.02% to 0.2%; Ni: 0.02% to 0.5%; Si: 0.05% to 0.1%, rare earth elements: 0% to 0.05%, and the balance of Cu. By changing the particle structure of the precipitated phase to match the composition of the copper-titanium alloy, the prepared elastic copper-titanium alloy has high strength, high elongation, high electrical conductivity, low stress relaxation rate, and good bending resistance.

The invention relates to high-toughness cold-hot-fatigue-resistant cast steel for a high-speed train brake disc and a preparation method thereof, belongs to the field of metal materials and preparation thereof, and solves the problem of matching of room-temperature toughness, high-temperature mechanical properties and cold and hot fatigue failure resistance of the cast steel for the high-speed train brake disc in the prior art. The high-toughness cold-hot-fatigue-resistant cast steel for the high-speed train brake disc comprises the following chemical components, in percentage by mass, of 0.20%-0.40% of C, 0.30%-0.70% of Si, 0.50%-2.00% of Mn, 0.50%-2.00% of Cr, 0.50%-2.00% of Ni, 0.40%-1.80% of Mo, 0.01%-0.30% of V, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% ofS, smaller than or equal to 0.010% of O, smaller than or equal to 0.015% of N, and the balance Fe and inevitable impurities, wherein the total content of the Mn, the Cr and the Ni is 2.00%-6.00%, andthe total content of the Mo and the V is 0.41%-2.00%. Through reasonable composition, organization structure and preparation process regulation and control, excellent room-temperature toughness, high-temperature mechanical property and cold and hot fatigue failure resistance of the cast steel are matched, the requirements for comprehensive mechanical property and long service life of the cast steel brake disc of a high-speed train are met, and the cast steel is suitable for being used as a material for the cast steel brake disc of the high-speed train.

The invention discloses a preparation method of a kularite ceramic solidifying body. The preparation method is characterized in that Ce2(C2O4)3.10H2O, An2 (C2O4)3.10H2O/oxide of An (An=Gd, Pr and Eu) and NH4H2PO4 are taken as raw materials; the high-quality kularite ceramic solidifying body is prepared according to formulation designing and the steps such as fine grinding, drying, granulating, forming, adhesive removing and vacuum hot-pressing sintering at a lower temperature. The kularite ceramic solidifying body prepared according to the preparation method is high in heat stability, mechanical stability, chemical stability and anti-radiation stability, is applicable to the safe solidification treatment of high-level waste, particularly applicable to the safe solidification treatment of high-level minor actinides waste which is high in radioactivity and toxicity, and long in half life period, and also applicable to the engineering application of high-level waste ceramic solidification treatment needing remote operation.

The invention discloses a low-density dual-phase high-entropy alloy material and a preparing method thereof. The elemental composition of the low-density dual-phase high-entropy alloy material is AlxTiyCrNiCu, wherein x is 0.5-3, y is 0.5-3, the crystal structure of the alloy material is FCC+BCC dual-phase structure, and the density is 5.18-7.14 g/cm<3>. The method is a solid-state forming methodfor combining a mechanical alloying technology and a spark plasma sintering technology, the required temperature of the solid-state forming method is low, the sintering time is short, a bulk materialwhich is uniform in compositions and has near full density can be obtained through once sintering, and a near net forming can be realized; and the prepared low-density dual-phase high-entropy alloy material is fine in grain, uniform in structure, and high in strength, hardness, wear resistance, and has excellent comprehensive mechanical properties such as plasticity.

The invention belongs to the technical field of metallurgy, and provides a high-nitrogen composite alloy which is prepared from the following components in percentage by weight: 5 to 20 percent of nitrogen, 15 to 40 percent of titanium, 15 to 40 percent of niobium, 10 to 20 percent of chromium, 10 to 20 percent of silicon, 2 to 10 percent of manganese, 1 to 5 percent of rare earth lanthanum, lessthan or equal to 1.0 percent of carbon, less than or equal to 0.06 percent of sulfur, and less than or equal to 0.1 percent of phosphorus. A preparation method comprises the steps of premixing raw material, then mixing, rising temperature, pretreating, then rising temperature for three times under the vacuum condition, preserving heat, pressing and firing. According to the prepared high-nitrogen composite alloy, the nitrogen content is remarkably improved, and a reinforcing steel bar using the high-nitrogen composite alloy has high tensile strength and bending strength, good shock resistance,good toughness and excellent mechanical property. The high-nitrogen composite alloy provided by the invention solves the problems of instable quality and low nitrogen content of the high-nitrogen reinforcing steel bar in the prior art.

The column type helical spring is made from Inconal X-750 (GH4145) alloy wire. The procedures for manufacturing the spring are as following: wrapping the semi-finished product of long coil of spring:cutting the long coil to single springs; washing the springs; carrying out the solid solution heat treatment; cutting end and adjusting the pitch, and carrying out the aging heat treatment. With the tests of rigidity and permangnet deformation in high temperature being completed, the finished springs are obtained. The device for testing rigidity of the spring includes the worktable, the electric stove and dial gauge etc. Testing indicates the performances of the spring: when the working temperature at 550 degree.C, the service life > or =25000 hr. The spring is easy to be assembled in the vapor lock.

The invention discloses an additive activated low-alloy-content iron-based powder and preparation method of sintered materials. A small amount of superfine powders of copper and phosphorization cuprous are added into atomized iron powder or alloyed powder such as nickel. The preparation method of the iron-base alloy sintered materials is that the uniform mixed power is conducted single press and single sintering for one time, or the power is conducted pre-sintering in low temperature and then is carried out re-pressing and after-combustion. The superfine phosphorization cuprous power in the iron-based mixed powder can effectively improve pressing lubricity of iron powder, facilitate balling of hole gaps in matrix in a relative low temperature, and improve density of a sintering body. The density of products which are made by single press and single sintering can achieve 7.22g per cubic centimeter on the condition of 600MPa to 700MPa, density of products which are made by re-pressing and after-combustion can achieve 7.52g per cubic centimeter under the condition of 700MPa to 800MPa, and higher mechanical property is realized.

The invention discloses a preparation method of high-toughness non-magnetic Ti(C,N)-based metal ceramic. The preparation method includes the following steps that firstly, TiO2 powder, W powder and active carbon powder serve as raw materials for burdening, high-energy ball milling is adopted, and an intermediate reaction product is obtained; then the obtained intermediate reaction product, TiN powder, Ni powder, Mo powder, Ti2AlN powder and AlN powder serve as raw materials for preparation of a mixture, wherein the mixture is prepared from components by mass parts: 24.0-30.3 parts of Ti, 11.5-16.1 parts of O, 14.0-19.3 parts of C, 1.9-2.3 parts of N, 18-32 parts of Ni, 10.0-11.1 parts of Mo, 4.0-4.5 parts of W and 0.4-0.6 part of Al; and adding of a forming agent, press-forming, removing ofthe forming agent and sintering are carried out, and the high-toughness non-magnetic Ti(C,N)-based metal ceramic is obtained. The sintered metal ceramic is not magnetic at room temperature and has high toughness and excellent comprehensive performance, there is no special requirement on production equipment, the energy consumption is reduced, and industrial application and popularization are facilitated.

The invention relates to a high-work-hardening magnesium alloy and a preparation method thereof, which belong to the field of metal materials. The alloy comprises the following chemical components in percentage by mass: 2.3-4.5 percent of tin, 0.1-3.85 percent of zinc and the balance of magnesium and unavoidable impurities; the magnesium alloy can further comprise one or more of 0.01-2.0 percent by mass of silicon, 0.01-3.0 percent of antimony, 0.01-3.0 percent by mass of tellurium, 0.01-1.5 percent by mass of strontium, 0.01-2.0 percent by mass of manganese and 0.01-3.0 percent by mass of rare earth elements; and the rare-earth elements include neodymium, lanthanum, yttrium and cerium. The preparation method comprises the following steps of: melting magnesium, adding tin and zinc, and adding additive elements and rare earth elements; and blowing, stirring, refining, removing slag, standing, directly pouring a melt into an ingot, and thermally extruding into a tubular product, a section or a plate. The alloy has the advantages of high-work-hardening capability, high plastic molding, simple and reliable preparation process, easiness for popularizing and application, and the like.

The invention relates to a neodymium-iron-boron magnet, and discloses a high-coercivity neodymium-iron-boron magnet preparation method and neodymium-iron-boron magnet thereof. The preparation method comprises the following steps: mixing neodymium-iron-boron powder and a low-melting-point metal adhesive for static pressure molding so as to obtain a compacted rough neodymium-iron-boron blank; mixingthe material containing heavy rare earth elements with the neodymium-iron-boron powder to heat to the molten state so as to obtain a heavy rare earth source melt; heating the rough neodymium-iron-boron blank in a protective atmosphere until the heating temperature is 200-250 DEG C higher than the melting point of the adhesive and keeping the temperature for 2-3h; then heating the S4-treated roughneodymium-iron-boron blank processed in S4 to 950 DEG C and immersing the rough neodymium-iron-boron blank in the heavy rare earth source melt, vacuumizing the rough neodymium-iron-boron blank and pressurizing the rough neodymium-iron-boron blank by piping in protective gas to the environment and taking out the rough neodymium-iron-boron blank after the immersing time so as to obtain the rough neodymium-iron-boron blank product; and performing surface treatment on the rough neodymium-iron-boron blank so as to obtain the finished product of the neodymium-iron-boron magnet. The obtained neodymium-iron-boron magnet has good grain boundary diffusion effect and higher coercivity than that of the neodymium-iron-boron magnet obtained by the existing grain boundary diffusion heavy rare earth element process.

The invention relates to a continuous semi-solid slurry preparing device and method capable of inhibiting the segregation of an Sn element in ZCuSn10P1 alloy and belongs to the technical field of material science. The continuous semi-solid slurry preparing device capable of inhibiting the segregation of the Sn element in the ZCuSn10P1 alloy comprises a cooling control device, an isothermal-like device and a pouring rotating disc device. In a solidification process, segregation inhibiting treatment is carried out on the alloy slurry, staged cooling control is carried out on melt through an inclined board melt cooling channel, and then, isothermal-like treatment is carried out on the slurry so as to promote the solid dissolving of the Sn element in a primary solid phase and reduce the concentration of the Sn element in a liquid phase. Finally, an even semi-solid melt structure with little inter-crystalline segregation is obtained.

The invention discloses a preparation method of a cerium-zirconium based solid solution. The preparation method comprises the following sequential steps: (1) preparation of Ce<4+>; (2) preparation of active ingredient solution; (3) precipitation reaction; (4) surface modification; (5) roasting. The Ce<4+> is prepared firstly and then mixed with other rare earth ions and positively quadrivalent zirconium ions to obtain a mixed metal nitrate solution; as the mixed metal nitrate solution contains an organic complexing agent, the precipitation speed in the precipitation reaction process is controlled by virtue of complexing coordination of the organic complexing agent and the rare earth and zirconium ions, so that a precursor uniform and stable in particle size is obtained; the surface treatment is performed on the precipitate precursor by use of polyacrylic acid, and therefore, the agglomeration problem of particles in the roasting process is solved, and the pore diameter and the pore volume of the roasted product are increased, and consequently, the cerium-zirconium based solid solution catalytic material excellent in heat stability is obtained. The preparation method is suitable for the preparation of the solid solutions.

The invention discloses high-chromium anti-crack wearable steel balls which comprise the following components in percentage by weight: 0.15-0.25% of C, 1.5-2% of Si, 1-1.4% of Mn, 0.05-0.1% of Ni, 13-15% of Cr, 0.15-0.2% of Mo, 0.1-0.2% of Al, 0.1-0.3% of Cu, 0.01-0.02% of B, 0.05-0.07% of Ti, 0.3-0 .5% of Nb and the balance of Fe, wherein the expression that Mn plus 9.7Ni plus 13.4Ti is greater than 2% and smaller than 3.2% is met. The invention further discloses a preparation method of the high-chromium anti-crack wearable steel balls. Through the element interaction in conjunction with the limitation on a proper annealing temperature and time, the steel balls can maintain a high hardness, high strength and corrosion resistance while having a good toughness and impact resistance, and can also be prevented from fracture.

The invention discloses a method of forming a TiB2 particle-reinforced high-entropy alloy coating on titanium alloy. The method comprises the steps that a Co film, an Ni film and a Cr film are formedon the surface of a titanium alloy substrate in advance in sequence, then Co, Cr, Cu, Fe, Ni, Mo, Mn and TiB2 mixed powder covers the titanium alloy substrate with the pre-formed film in a fusion mode, and therefore the TiB2 particle-reinforced CoCrCuFeNiMoMn high-entropy alloy coating can be obtained. The coating which is obtained according to the method has the advantages of being high in wear resistance and high in oxidation resistance.