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1642 results about "Solution treatment" patented technology

Solution treatment is a broad term in heat treating used to refer to the heating of a material to temperatures sufficient for the dissolution of its soluble phases. It is then held for a time until it is quenched, causing the material to retain the properties of the solution.

CuCrZr alloy with high strength and high conductivity, and preparation and processing method thereof

The invention relates to a CuCrZr alloy with high strength and high conductivity, and a preparation and processing method thereof. The alloy comprises the basic ingredients in percentage by mass: 0.3 percent to 1.4 percent of Cr, 0.02 percent to 0.25 percent of Zr and the balance Cu, wherein the ingredients in the CuCrZr alloy are needed to meet the following requirements: (a) Cr/Zr is less than or equal to 5 and is greater than or equal to 1.9; and (b) Cr+Zr is less than or equal to 1.5 percent and is greater than or equal to 0.4 percent. The preparation and processing method comprises the following steps of: a, compounding, feeding, smelting and casting according to mass percent; b, surface milling; c, hot rolling; d, solution treatment; e, primary cold rolling; f, primary aging; g, secondary cold rolling; and h, secondary aging. The CuCrZr alloy has the tensile strength sigma b being 600-700 MPa, the plasticity elongation rate delta being 4-10 percent, and the conductivity being greater than 80 percent of IACS (International Annealed Copper Standard), can be widely applied to occasions with high strength and high conductivity for preparing resistance welding electrodes, liners of crystallizers of continuous casting machines, integrated circuit lead frame and the like.
Owner:GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG

Ultra pure electroslag remelting method for high-performance corrosion resistant alloy

The invention relates to an ultra pure electroslag remelting method for a high-performance corrosion resistant alloy, and the method comprises the following steps of: preparing the following ingredient components of a self-fluxing electrode bar in parts by weight: 25-34 parts of Ni, 25-29 parts of Cr, 2.5-4.5 parts of Mo and 30-45 parts of Fe, and carrying out vacuum induction melting, so as to obtain the self-fluxing electrode bar; slowly melting the self-fluxing electrode bar in melted electroslag remelting slag charge comprising the following components in parts by weight: 55-80 parts of CaF2, 5-25 parts of CaO, 5-15 parts of Al2O3 and 5-10 parts of MgO, purifying, and recrystallizing in a crystallizer, so as to obtain an electroslag ingot; and forging the electroslag ingot into a bar material at the temperature of 1130+/-5 DEG C, and carrying out solution treatment, so that the high-performance corrosion resistant alloy is obtained. By utilizing the ultra pure electroslag remelting method provided by the invention, the content of harmful elements such as sulphur and phosphorus in the alloy can be reduced, the impurity distribution of the alloy is improved, fining of structure can be facilitated, and the hot workability and yield of the alloy can be improved.
Owner:CHONGQING MATERIALS RES INST

Method and tooling for controlling deformation of nickel-based ageing-strengthening high-temperature alloy casing welding assembly

The invention relates to the technical field of welding, in particular to a method for controlling deformation of a nickel-based ageing-strengthening high-temperature alloy casing welding assembly, and a piece of technological equipment of the method. According to the method, the welding deformation is controlled by using rigid limit of materials with close linear expansion coefficients, a tooling structure that can meet rigid supporting requirements during welding as well as control and eliminate residual stress deformation during welding is adopted, after an inner ring and eight T-shaped supporting plate components form an eight-diagram structure, a heat treatment process at the temperature of 550 DEG C for eliminating stress is additionally performed so as to reduce residual stress between the inner ring and the roots of the supporting plates before electron beam welding; after all welding processes are completed, a vacuum solution treatment process at the temperature of 970 DEG C is additionally performed, and a double aging treatment process at the temperature of 720 DEG C and 620 DEG C is further additionally performed to completely eliminate residual internal stress after welding so as to achieve service performance. According to the invention, the problems that the conventional combustion engine can not control fatigue crack, and requirements on the reliability and the service life of the combustion engine can not be met are solved; by adopting the novel welding technology method and the technological equipment, the investment is small, the operation is simple and the engineering application is facilitated.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION

Austenic stainless steel strip and manufacturing method thereof

The invention discloses an austenitic stainless steel belt and a manufacturing method thereof. The invention is characterized by comprising the following chemical elements in terms of weight percentage: 0.04 to 0.12 percent of C, 0.4 to 1. percent of Si, 0.8 to 2 percent of Mn, less than or equal to 0.04 percent of P, less than or equal to 0.03 percent of S, 17 to 19 percent of Cr, 7 to 10 percent of Ni, 0.25 to 0.5 percent of Cu and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps: smelting; continuous casting with thin belts; control of cooling and winding; acid pickling, direct cold rolling and annealing; acid pickling again and cold rolling to achieve the thickness of a finished product; annealing after achieving the thickness of the finished belt steel, acid pickling, leveling, and length cutting into a finished coil. By utilizing the element of Cu, the invention reduces the use amount of Ni in the steel, reduces the production cost, simultaneously reduces the content of the residual ferrite in the steel, improves the wearing resistance of the steel, adopts direct cold rolling to match the high-temperature annealing procedure, and saves the procedures of hot rolling and solution treatment so as to lead the production process to be simple and stable.
Owner:BAOSHAN IRON & STEEL CO LTD

Martensite stainless steel and preparation method for flat strip of martensite stainless steel

The invention discloses martensite stainless steel and preparation method for flat strips of martensite stainless steel. The martensite stainless steel comprises following chemical components by weight percentage: C 0.02 to 0.06%, Si 0.3 to 0.5%, Mn 1.0 to 1.5%, Ni 8.5 to 9.0%, Cr 17.5 to 18.5%, Ti 0.4 to 0.6%, P no more than 0.009% and S no more than 0.009%, with the balance being Fe. The preparation method for flat strips of the martensite stainless steel comprises the following steps: a) weighing above-mentioned chemical components at desired weight percentage; b) carrying out vacuum induction melting; c) carrying out casting to obtain remelt electrode bars; d) carrying out electroslag remelting to obtain steel ingots; e) forging steel ingots into billets; f) processing billets into round strips; g) carrying out solid solution treatment; h) drawing treated blanks into wires; i) preparing flat strips. According to the invention, equivalents of nickel and chromium are strictly controlled, the ratio of C to Ti and alloy elements are optimized, EVR smelting is carried out and such alloying elements as C, Si, Mn and Ti are added, thereby enabling formation of a metastable austenite structure; a predeformed phase-changed martensite wire material is obtained by wire drawing; and the ultra high strength deformed flat strips of martensite stainless steel are obtained by flat strip rolling.
Owner:CHONGQING MATERIALS RES INST

Preparation method of micro/nano-structure ultrahigh-strength plastic stainless steel containing Nb

ActiveCN102994905AImprove stabilityGrain refinement is obviousMicro nanoSS - Stainless steel
The invention belongs to the field of production of ultrahigh-strength plastic alloy steel, and relates to a preparation method of micro/nano-structure ultrahigh-strength plastic stainless steel containing Nb. The preparation method comprises the steps of: firstly preparing materials according to a composition proportion, adding 0.05-0.15% of Nb element on the basis of 316L austenitic stainless steel, then carrying out vacuum induction furnace smelting, casting blank forging, forged piece hot rolling and solution treatment, carrying out cold deformation on the steel plate which undergoes the solution treatment with deformations of 40%, 60%, 80% and 90% and with single reduction in pass controlled within 3-10% to prepare steel plate with different cold deformations, annealing the steel plate which undergoes the cold deformation with heating rate controlled at 50-200 DEG C/s, with heating temperature within 750-950 DEG C and with heat preservation time within 5-100s, and cooling to the room temperature at a cooling rate of 50-400 DEG C/s to obtain a superfine austenite structure with micro-nano scale. The obdurability of the material is synchronously improved. The yield strength of the final product can be up to 750-800MPa, the strength of extension is up to 1100-1200MPa and the percentage of elongation is 35-45%.
Owner:UNIV OF SCI & TECH BEIJING

High-strength, high-conductivity and high-extensibility rare earth copper alloy and preparation method thereof

A high-strength, high-conductivity and high-extensibility rare earth copper alloy and a preparation method thereof are disclosed. The alloy is composed of following components in percentage by weight: 0.5 to 1.5% of chromium, 0.3 to 0.5% of zirconium, 0.1 to 0.3% of nickel, 0.2 to 0.5% of titanium, 0.2 to 0.4% of manganese, 0.02 to 0.15% of rare earth elements and the balance of copper and inevitable impurity elements, wherein the rare earth elements are one or two elements of erbium and lanthanum. The preparation method comprises following steps: preparing intermediate alloy, smelting, moulding, casting, treating solid solution, drawing to deform, performing an aging treatment, and a cold rolling treatment. The components and the ratio of the components are limited to let each component have a combined action, thus the comprehensive properties of the alloy material are prominently improved: the extension strength is larger than 630 MPa, the hardness is larger than 190 HV, the ductility is larger than 10%, the conductivity is larger than 80%IACS, and the softening temperature is larger than 520 DEG C; and the rare earth copper alloy can satisfy the requirements of materials in the electronic industry such as lead frame on copper alloy performances.
Owner:HENAN UNIV OF SCI & TECH

Moisture absorption and perspiration fiber with hydrophilic function

InactiveCN101982572APracticalImprove moisture wicking efficiencyFibre typesMelt spinning methodsFiberPolyester
The invention relates to a moisture absorption and perspiration fiber with a hydrophilic function, comprising filaments and chopped fibers. The preparation process comprises the following steps: modifying conventional polyester to obtain hydrophilic modified polyester; mixing the conventional polyester, the hydrophilic modified polyester and water soluble polyester according to a certain proportion for carrying out composite spinning; extruding the mixture by a profile spinneret and carrying out postprocessing process for spinning to obtain the hydrophilic moisture absorption and perspiration polyester filaments or chopped fibers. Alkaline solution treatment is carried out on fabrics made from the fiber provided by the invention to form multiple micropores and trenches in the surfaces of the fabrics, so that the fabrics are dry and comfortable with water absorption and perspiration and ventilation properties, thus the fabrics can be manufactured into sportswear and underwear. In the invention, structural design and chemical modification of the fiber are combined, so that the moisture absorption and perspiration property is greatly enhanced; and in addition, as the fiber is free from influence of blend fiber or the manufacturing process, the applicability is wide.
Owner:SHANGHAI VITA SCI & TECH

Method for preparing high-performance Cu-Fe deformation in-situ composite material by magnetic field treatment

The invention provides a method for preparing a high-performance Cu-Fe deformation in-situ composite material by magnetic field treatment, which is characterized in that the Cu-Fe deformation in-situ composite material in the method is finally prepared into a formed copper material through technical process flows of material proportioning, smelting, casting or continuous casting, magnetic field control solidification, hot forging or hot milling, solid solution treatment, cold milling, cold pulling and magnetic field ageing control. The magnetic field is exerted in the ingot casting solidification process, the solidification of the Cu-Fe deformation in-situ composite material is controlled, Fe dendritic crystals carry out extremely obvious thinning, and the Fe aliquation is reduced, so the material disperses and distributes the uniform and fine Fe fiber phase in a base body after the subsequent cold deformation processing, and the intensity of the material is greatly improved. The magnetic field is exerted in the ageing process treatment process for promoting the Fe separation, increasing the separation amount of Fe particles, reducing the separation phase dimension and promoting the separation phase dispersion distribution, so the conductivity of the material is greatly improved, and the intensity of the material is further improved. The preparation process is simple, and the cost is low. The invention is applicable to the preparation of the high-performance Cu-Fe deformation in-situ composite material or other similar materials.
Owner:INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI

Preparation method of Al-Cu-Mg-Ag ultrafine crystal heat-resistant aluminum alloy

The invention provides a preparation method of an Al-Cu-Mg-Ag ultrafine crystal heat-resistant aluminum alloy, comprising the following steps: hot extrusion, solid solution hardening, equal channel angular pressing and ageing treatment, thus finally improving the heat resistance of Al-Cu-Mg-Ag alloy. The specific steps are as follows: homogenizing annealing of the as-cast aluminum alloy, hot extrusion with the extrusion ratio of 8-15, multi-pass equal channel angular heat extruding deformation at the temperature of 350-430 DEG C, solution treatment, hardening in water at a room temperature, and then ageing treatment at the temperature of 150-210 DEG C; or solution treatment of the alloy in a hot extrusion state, hardening in water at the room temperature, multi-pass equal channel angular heat extruding deformation at the room temperature and then ageing treatment. The process method of the invention can improve the heat resistance of the Al-Cu-Mg-Ag alloy and enlarge the application range of the aluminum alloy on the basis of the existing alloy. The preparation method of the invention has simple process and convenient operation, and can effectively refine crystal particles of the Al-Cu-Mg-Ag alloy, improve the density of a precipitated and strengthened phase, enhance the overall strength and the high-temperature heat resistance of the Al-Cu-Mg-Ag alloy, and achieve industrialized production and application.
Owner:CENT SOUTH UNIV

Method for improving stress corrosion resisting performance of aluminum lithium alloy

The invention belongs to the aluminum lithium alloy heat treatment technology, in particular to a heat treatment technology capable of improving the stress corrosion resisting performance of an aluminum lithium alloy. Applicable alloy components of the technology comprise main alloying elements including, by weight percent, 0.5%-5.0% of Cu, 0.4%-2.5% of Li, 0.1%-4.0 % of Mg and 0.1%-4.0% of Zn, comprise microalloying elements including any one to four of, by weight percent, 0.04%-0.02% of Zr, 0.05%-0.60% of Sc, 0.20%-0.80% of Mn and 0.1%-0.9% of Ag and comprise, by weight percent, smaller than or equal to 0.10% of Si, smaller than or equal to 0.10% of Fe, smaller than or equal to 0.10% of Ti, smaller than or equal to 0.05% of each of other impurities and the balance Al, wherein the total amount of other impurities is smaller than or equal to 0.15%. After a deformed product is subjected to annealing treatment, cold deformation of a certain deformation amount is conducted, then solution hardening is conducted, regulation and control over the recrystallization degree and the grain boundary precipitates can be achieved through the manner, and other mechanical properties of the alloy are kept unchangeable while the stress corrosion resisting performance of the alloy is improved. The alloy preparing steps include annealing treatment, cold deformation treatment, solution treatment and ageing treatment. The technology is suitable for high-performance Al-Cu-Li-X series aluminum lithium alloy thick plates and forge pieces used in the fields of aviation, spaceflight and weapons.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS

Preparation method of ultrafine grain rare earth magnesium alloy

The invention provides a preparation method of an ultrafine grain rare earth magnesium alloy. The method comprises the following steps of: firstly performing solution treatment on a rare earth magnesium alloy cast ingot to obtain the rare earth magnesium alloy after the solution treatment; then performing heat deformation processing on the obtained rare earth magnesium alloy after the solution treatment to obtain a heat-deformed rare earth magnesium alloy plate, wherein the heat deformation processing temperature is 350 DEG C-450 DEG C; and finally performing accumulative roll bonding with the single-pass rolling reduction of 50% on the obtained heat-deformed rare earth magnesium alloy plate, and annealing to obtain the ultrafine grain rare earth magnesium alloy. According to the preparation method provided by the invention, a heat deformation processing-accumulative roll bonding compound process is firstly adopted to successfully prepare the ultrafine grain rare earth magnesium alloy, and the problem of deterioration of mechanical properties, which is caused by non-uniform distribution of thick and big LPSO (long period stacking ordered) phases in the alloy is effectively solved; and furthermore, the preparation method provided by the invention has the advantages of simple process flow and low equipment cost, and is favorable for further large-scale industrial production.
Owner:XINJIANG TENGXIANG MAGNESIUM PROD CO LTD

High-strength high-toughness Al-Zn-Mg-Cu aluminum alloy and heat treatment method thereof

The invention specifically relates to a high-strength high-toughness Al-Zn-Mg-Cu aluminum alloy and a heat treatment method thereof. The heat treatment method for the high-strength high-toughness Al-Zn-Mg-Cu aluminum alloy comprises the following concrete steps: putting an alloy ingot into a salt bath furnace for heating, and successively carrying out two-stage homogenization treatment, milling and hot-rolling so as to obtain an alloy sheet; then placing the alloy sheet in the salt bath furnace for two-stage solid solution treatment so as to obtain an alloy having undergone solid solution treatment; putting the alloy having undergone solid solution treatment into liquid nitrogen for quenching; and finally, putting the alloy into a microwave heat treatment furnace for regression and aging treatment, carrying out primary T6 treatment, then carrying out heat-preserved regression treatment, carrying out secondary T6 treatment after water quenching, taking out the alloy from the furnace andcarrying out air-cooling to room temperature so as to obtain the high-strength high-toughness Al-Zn-Mg-Cu aluminum alloy. The heat treatment process of the invention is simple, can realize the precise control of temperature through microwave heating, and has obvious advantages in the aspects of cleanness, high efficiency and energy conservation. The aluminum alloy prepared in the invention has the characteristics of high strength, high toughness and high corrosion resistance, and is suitable for large-scale industrial production.
Owner:江苏空天轻合金科技有限公司

High-strength, high-conductivity and heat-resisting aluminum alloy bus and production method thereof

The invention discloses a high-strength, high-conductivity and heat-resisting aluminum alloy bus and a production method thereof. The high-strength, high-conductivity and heat-resisting aluminum alloy bus comprises the following components in percentage by mass: 0.4-1.1 percent of magnesium (Mg), 0.3-0.9 percent of silicon (Si), 0.85-2.1 percent of copper (Cu), 0.03-0.3 percent of zirconium (Zr), 0.05-0.38 percent of rare earth (La), less than 0.4 percent of Ferrum (Fe), less than 0.01 percent of manganese (Mn) and the balance of aluminum (Al), wherein the ratio of Cu to Mg is 1.9-2.3. The production method comprises the steps of: uniformly annealing a cast ingot obtained through smelting and casting for 10-20h at a temperature of 470-550 DEG C, furnace-cooling; controlling the temperature of the cast ingot to be 480-540 DEG C for thermally deforming, wherein the final temperature of the thermal deformation is not less than 380 DEG C, the total deformation rate of the thermal deformation reaches 80-94 percent; then carrying out cold deformation on a thermally deformed blank at the total deformation rate of 80-90 percent; annealing the deformed product, wherein the annealing temperature is 330-350 DEG C, the insulation time is 2h; carrying out solution treatment for 1-3h at a temperature of 490-525 DEG C; and carrying out artificial ageing treatment for 24-36h at a temperature of 175-200 DEG C.
Owner:BAOTOU JI TAI RARE EARTH ALUMINUM CO LTD

Preparation method of polycrystalline silicon thin film, polycrystalline silicon thin film transistor and array substrate

The embodiment of the invention provides a preparation method of a polycrystalline silicon thin film, a polycrystalline silicon thin film transistor and an array substrate and relates to the technical field of display. By means of the preparation method, polycrystalline silicon crystals are uniform, the grain size is increased, crystal quality is improved, and therefore the electrical properties of the thin film transistor are improved. The preparation method of the polycrystalline silicon thin film comprises the steps that an amorphous silicon thin film is formed on a substrate; the amorphous silicon thin film is treated through an excimer laser annealing method, so that the amorphous silicon thin film is crystallized into the polycrystalline silicon thin film. Furthermore, after the amorphous silicon thin film is formed and before the amorphous silicon thin film is treated though the excimer laser annealing method, the preparation method further comprises the steps that the surface of the amorphous silicon thin film is subjected to nickel salt solution treatment, so that a nickel salt solution is uniformly smeared on the surface of the amorphous silicon thin film. The method is used for preparation of the polycrystalline silicon thin film, the low-temperature polycrystalline silicon thin film transistor and the array substrate requiring that the uniformity of the polycrystalline silicon crystals is improved, the grain size is increased, and crystal quality is improved.
Owner:BOE TECH GRP CO LTD

Vanadium extraction technology of low-grade high-calcium vanadium-containing steel slag

The invention discloses a vanadium extraction technology of low-grade high-calcium vanadium-containing steel slag. The technology comprises the following steps of: a, performing pretreatment of the low-grade high-calcium vanadium-containing steel slag; b, performing oxidation calcification roasting of the low-grade high-calcium vanadium-containing steel slag; c, performing carbonation leaching treatment of the vanadium-containing steel slag after the roasting to obtain vanadium-containing leachate; d, adding an acid to the vanadium-containing leachate to precipitate vanadium, and filtering to obtain coarse vanadium; e, performing alkaline solution treatment of the coarse vanadium, and filtering to obtain V<5+>-containing filtrate; and f, adding NH4Cl into the V<5+>-containing filtrate, reacting to generate NH4VO3, and performing deamination to obtain V2O5 finally. Through the vanadium extraction technology disclosed by the invention, the requirement on calcium content is reduced; high-purity vanadium pentoxide is produced from low-grade high-calcium vanadium-containing steel slag; and the vanadium resource in the vanadium-titanium magnetite is effectively recycled and utilized. The invention provides conditions for the vanadium extraction of a converter single-link method; and the vanadium-containing molten iron is directly used for steelmaking, the vanadium enters the low-grade high-calcium steel slag, and an additional converter for vanadium extraction is not needed, thereby avoiding the interference and influence on the steelmaking caused by the additional vanadium extraction converter for vanadium extraction.
Owner:SICHUAN DAZHOU IRON & STEEL GROUP
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