46results about How to "High strength high strength" patented technology

The invention discloses a low-cost high-strength high-toughness high-thermal conductivity wrought magnesium alloy and a preparation method thereof. The low-cost high-strength high-toughness high-thermal conductivity wrought magnesium alloy comprises, by mass, 0.5-3% of Zn, 0.1-0.5% of Ca, 0.1-0.5% of La, 0.1-0.4% of Mn and the balance Mg and unavoidable impurities. The preparation method comprises 1, preparing a magnesium alloy cast ingot, 2, preparing an extruded blank, and 3, carrying out extrusion deformation treatment to obtain the low-cost high-strength high-toughness high-thermal conductivity wrought magnesium alloy. The low-cost high-strength high-toughness high-thermal conductivity wrought magnesium alloy has thermal conductivity of 125-140W.(m.k)<-1>, tensile strength of 330-360MPa, yield strength of 310-330MPa and an elongation percentage of 15-35%.

The invention belongs to the technical field of aluminum alloy materials for power equipment, and particularly relates to a manufacturing method of a high-strength high-conductivity aluminum alloy large-scale bar. A 6063 high-strength high-conductivity large-specification bar is used for processing a high-strength high-conductivity large electric element in power equipment, particularly a 6063T6 aluminum alloy bar with a diameter over 150-300mm. A sixth-system round aluminum alloy ingot is adopted and contains the following elements in percentage by mass: 0.40-0.44% of Si, less than or equal to 0.13% of Fe, less than or equal to 0.1% of Cu, less than or equal to 0.10% of Mn, 0.55-0.60% of Mg, less than or equal to 0.05% of Zn, less than or equal to 0.05% of Ti, less than or equal to 0.10% of Cr, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of all impurities and the balance of Al. The problems in production and delivery can be effectively solved, the strength and conductivity of the large-specification aluminum alloy bar are improved, and the processing and application are facilitated; by adopting the method, the mechanical properties and conductivity are stable; and through repeated reproduction operations, the national standard for a diameter below 150mm can be met, the national standard for bars with diameters over 150-300mm can be supplemented or completed, and all performance indexes are introduced into the national standard.

The invention relates to a high strength and high toughness epoxy resin composition applicable for hot melt method preparation of a carbon fiber reinforced composite prepreg. The high strength and high toughness epoxy resin composition comprises epoxy resin with multiple degrees of functionality and high epoxy value, bisphenol A polyether epoxy resin with low viscosity, high performance thermoplastic resin and a solid curing agent. The high strength and high toughness epoxy resin composition provided by the invention has the advanategs of flexible formula, simple preparation process and adjustable viscosity, is especially suitable for hot melt preparation of prepreg; and the cured material has the characteristics of high strength and high toughness, and can used for preparation of composite materials with high mechanical properties.

The invention discloses a high-strength and high-conductive copper alloy of continuous casting thin-belt crystal roll, which comprises the following parts: 1-2.5% Ni, 0.05-0.2% Si,0.05-0.2% Zr, 0.2-0.4% Cr, 0.05-0.1% Sn, one or more of Fe, Co and Mg with total quantity less than 0.15% and Cu, wherein the rate of Ni and Si is more than 8: 1. The making method comprises the following steps: adding Ni, Zr, Co and Sn to exert alloy element action; heating; obtaining the copper alloy material without beryllium.

The invention provides an ultrahigh-strength and ultrathin bottom board for a laminated slab and a production method thereof. The ultrahigh-strength and ultrathin bottom board comprises a bottom board made of a fiber-toughened cement-based composite material, wherein a longitudinally and horizontally-distributed steel wire mesh formed by longitudinally-distributed bars and horizontally-distributed steel bars is arranged in the bottom board, and an interface shear-resistant connecting piece is arranged on the steel wire mesh. The ultrahigh-strength and high-performance fiber-toughened cement-based composite material is applied to the design of a bottom board of the laminated slab, so that ultrahigh-strength and ultrathin bottom board for the laminated slab is formed. The bottom board has the advantages of ultrahigh strength, thin thickness, high crack resistance, light weight, durability and the like, and can create great economic and social benefits after being popularized.

The invention discloses a method for preparing a high-strength and high-toughness poly-ion hydrogel support through 3D printing. The method includes the steps that an N,N,N-trimethyl-3-(2-methyl allyl acylamino)-1-propyl ammonia chloride solution to which a photoinitiator is added and a sodium p-styrenesulfonate solution are put below an ultraviolet lamp to be irradiated, solutions of two polymers are obtained, and two kinds of polymer powder are obtained after purifying, drying and grinding are completed; the two kinds of polymer powder are prepared into a water solution, the water solution is mixed and stirred, polyion compound precipitates are obtained, collected and dried, and polyion compound powder is obtained; saline is added into the polyion compound powder, the materials are stirred to be uniform, and polyion gel is obtained; a 3D printer is used for extruding the polyion gel in pure water under set printing parameters, and the poly-ion gel support is obtained after soaking and cross-linking forming. According to the method, bio-supports with different micro-structures and macro-appearances can be printed by correcting the printing parameters while it is guaranteed that the support has good mechanical performance.

The invention discloses high-strength, high-toughness and anti-corrosion cobalt-free high-entropy alloy and a preparation method thereof. In the high-strength, high-toughness and anti-corrosion cobalt-free high-entropy alloy, the atomic percent of Fe: Ni: Cr: Mn: Al is 30-27.5% : 30-27.5% : 15% : 10% : 15-20%. A preparation technology of the high-strength, high-toughness and anti-corrosion cobalt-free high-entropy alloy comprises the following steps: selecting the five elements including Fe, Ni, Cr, Mn and Al with the purity of each being 99.9wt% as the raw material for batching, and utilizinga non self-consuming electric arc furnace to prepare the high-entropy alloy through smelting. The high-entropy alloy is uniform in texture, shows excellent comprehensive mechanical property, does notcontain the expensive Co element and is low in price. The yield strength of the high-entropy alloy is equal to or greater than 770MPa, the breaking strain is equal to or greater than 45%, the corrosion resistance of the high-entropy alloy to 3.5wt.% NaCl is better than the corrosion resistance of stainless steel SUS 304 to 3.5wt.% NaCl, and the application prospect is broad.

The invention provides an ultrahigh-strength high-toughness high-conductivity copper-nickel-tin alloy which contains nickel, tine, yttrium, niobium, scandium and cerium elements. The total mass of theyttrium, niobium, scandium and cerium elements is less than or equal to 0.5 percent of the mass of the copper-nickel-tin alloy. The copper-nickel-tin alloy has high strength, toughness and conductivity, and is wide in application range. The invention further provides a preparation method of the copper-nickel-tin alloy. The preparation method of the copper-nickel-tin alloy concretely comprises thesteps of preparing materials according to the mass percent of element compositions, and adopting a gas atomization method for preparing to obtain alloy powder; adopting hot isostatic pressure sintering on the alloy powder to obtain a copper-nickel-tin alloy ingot blank; and carrying out solution treatment and warm deformation strengthening treatment on the copper-nickel-tin alloy ingot blank so as to obtain the ultrahigh-strength high-toughness high-conductivity copper-nickel-tin alloy. According to the preparation method, multiple compound factor strengthening and toughening copper alloys are implemented and utilized, and the obtained copper-nickel-tin alloy has the characteristics of refined crystalline strengthening, strain strengthening, dispersion strengthening and precipitation hardening at the same time so as to obtain high strength, toughness and conductivity.

The invention discloses a thick-wall high-strength high-toughness oil casing pipe which comprises the chemical elements in percentage by mass: 0.22 to 0.30 percent of C, 0.1 to 0.4 percent of Si, 0.5to 1.2 percent of Mn, 0.8 to 1.3 percent of Cr, 0.6 to 1.2 percent of Mo, 0.02 to 0.06 percent of Nb, 0.2 to 0.3 percent of V, 0.02 to 0.06 percent of Ti, 0.0015 to 0.005 percent of B, 0.01 to 0.05 percent of Al, 0.0005 to 0.005 percent of Ca, and the balance Fe and inevitable impurities. The invention further discloses a manufacturing method of the thick-wall high-strength high-toughness oil casing pipe. The manufacturing method of the thick-wall high-strength high-toughness oil casing pipe comprises the steps of (1) smelting and continuous casting; (2) perforating and continuous rolling; and(3) adopting heat treatment processes for two times, wherein during heat treatment for the first time, a two-phase region quenching process is adopted, so that austenite formed by dispersed distribution of a two-phase region is quenched so as to form martensite, and other tissues keep as bainite; and during heat treatment for the second time, a process of water quenching and tempering after complete austenitizing is adopted. The thick-wall high-strength high-toughness oil casing pipe provided by the invention is low in cost, has high strength and high toughness at the same time, and can meetthe demand of an oil field on high-performance oil well pipes.

The invention relates to a high-strength and high-corrosion-resistance ternary magnesium alloy and a preparation method thereof. The magnesium alloy comprises, by mass, 8-12 wt% of Y, 0.6-3 wt% of Aland the balance Mg. The method comprises the following steps that (1) under a protective atmosphere, a Mg-Y intermediate alloy, an aluminum ingot and a magnesium ingot are prepared to prepare a magnesium alloy melt; (2) under the protective atmosphere, the magnesium alloy melt stands after being stirred, refining and degassing, and slag removal are carried out, and the magnesium alloy melt standsagain and preserves heat to obtain magnesium alloy liquid; (3) the magnesium alloy liquid is cast into a mold under the protective atmosphere to form a cast ingot; and finally, the high-strength and high-corrosion-resistance ternary magnesium alloy is obtained through the above three steps. Compared with the prior art, the method has the advantages of being good in corrosion resistance, high in mechanical property, low in sensitivity to impurity iron elements and simple in preparation process.

The invention discloses an ultra-thick rock plate and a preparation method and application thereof. The ultra-thick rock plate comprises a green body layer and a glaze layer, the green body layer comprises bentonite, kaolin, porcelain sand, sand powder, aluminum powder, wollastonite, feldspar and green body additives, and the green body additives comprise phosphate, humate, silicate and cellulose salt. The mass ratio of the bentonite to the kaolin is (1-2.5): (1-2). The bentonite is adopted to replace part of kaolin, so that the ignition loss is reduced, and the oxidation performance and hardness are improved. Phosphate, humate, silicate and cellulose salt are adopted as green body additives, the defect that the strength of the green body is reduced due to reduction of kaolin is overcome, and the product performance and the technological requirements of the production process are better met.

The invention relates to high-strength high-performance concrete. The concrete is prepared from the following components in parts by weight: 200-240 parts of cement, 20-30 parts of coal ash, 500-750 parts of sand, 800-1100 parts of rubbles, 10-30 parts of hemihydrate gypsum, 40-55 parts of kaolin, 20-40 parts of serpentine powder, 20-40 parts of zirconium silicate, 20-30 parts of polycarboxylene based superplasticizer, and 100-150 parts of water. The high-strength high-performance concrete disclosed by the invention ha the advantages of being high in strength, good in durability, good in construction liquidity, and hard to produce cracks, and the concrete is suitable for extensive popularization and application.

The invention discloses an MIM process for ultrahigh-strength and high-toughness steel parts, and belongs to the technical field of metal powder injection molding. The MIM process comprises the following steps of raw material selection, feed preparation, injection molding, catalytic degreasing, thermal degreasing and sintering, solution treatment and aging treatment, Wherein the procedure of thermal degreasing and sintering specifically comprises the step of a green body subjected to catalytic degreasing being sequentially subjected to thermal degreasing, deoxidation and decarbonization and sintering. The MIM process for the ultrahigh-strength and high-toughness steel parts has the characteristics of being simple, convenient, economical and efficient, metal parts which are ultrahigh in strength, high in toughness and high in hardness and have three-dimensional complex shapes can be manufactured in a large scale within a short time, by means of improvement on raw material components and a thermal degreasing and sintering process, the strength, toughness and hardness of the steel parts can be remarkably improved, the requirements of 3C and other industries for high-performance parts can be met, and huge economic benefits are generated.

The invention relates to an ingredient designing and preparing method of a novel cold mounting material, in particular to a novel cold mounting material for metallographic specimen mounting. The coldmounting material is composed of, by mass, 5-8 parts of dental base acrylic resin liquid, 7-9 parts of dental base acrylic resin powder and 6-15 parts of aluminate cement. The preparation method includes: sufficiently mixing the dental base acrylic resin powder and the aluminate cement, and adding the dental base acrylic resin liquid. The cold mounting material prepared by the method is quick in curing, good in forming effect, high in hardness, wear resistance and deformation temperature and free of deformation after being formed below 200 DEG C.