117results about How to "Refined recrystallized grains" patented technology

The invention discloses a preparation method for a graphene rare earth aluminum alloy high-conductive material. The method comprises the following steps: adding aluminum scrap, silicon calcium alloy, copper aluminum alloy, zinc aluminum alloy, magnesium ingot, rare earth aluminum alloy and graphene into a smelting furnace for smelting; performing ladle analysis, thereby acquiring an aluminum alloy solution; casting and rolling the aluminum alloy solution, thereby acquiring aluminum alloy; performing homogenization treatment on the aluminum alloy; performing ageing treatment, thereby acquiring the graphene rare earth aluminum alloy high-conductive material. According to the preparation method for the graphene rare earth aluminum alloy high-conductive material, provided by the invention, the technical parameters are reasonably set, the graphene structure is optimized and the overall performance of the aluminum alloy is effectively improved, so that the acquired graphene rare earth aluminum alloy high-conductive material has excellent electric conductivity, heat resistance, arc altitude resistance and mechanical properties.

The invention discloses high-sag-resistance brazing composite aluminum alloy foil for a heat exchanger, which consists of a core and a clad. The thickness of the clad accounts for 8-15% of the total thickness of the composite aluminum alloy foil. The core comprises the following components by weight: 1.4-1.6% of manganese, 0.4-0.6% of silicon, 0.50-0.90% of iron, 1.00-1.60% of zinc, 0.10-0.50% of vanadium, 0.05-0.30% of zirconium, 0.05-0.30% of titanium, and the balance of aluminum and inevitable impurities, wherein the contents of copper and magnesium in the impurities are both smaller than 0.05%. The alloy provided by the invention can be rolled into controlled atmosphere brazing (CAB) composite aluminum alloy foils for heat exchangers. The composite aluminum alloy foil disclosed by the invention has reasonable component ratio, easy manufacturing, good corrosion resistance, and high sag resistance after brazing, and is suitable for large-scale industrial production.

The invention discloses a medium-strength aluminum alloy material, which comprises the following components by weight percentage: Fe: 0.15-0.45%, Si: 0.35-0.55%, Mg: 0.42-0.62%, Cu: 0.05-0.40%, B: 0.01‑0.03%, Ti: 0.005‑0.02%, rare earth elements: 0.05‑0.15%, Al: 98.1‑98.9%, impurity content <0.1%, the rare earth elements are lanthanum and cerium, and the mass of lanthanum and cerium The ratio is 2:1; and the preparation method is disclosed. The invention mainly improves the quality of the aluminum billet by optimizing the design of raw materials and using them reasonably. According to the characteristics of the chemical composition of industrial aluminum ingots, aluminum master alloys are reasonably designed and selected. At the same time, through the control of smelting, refining, casting, rolling and other processes, aluminum alloy rods with tensile strength and electrical conductivity meeting the requirements of medium strength can be produced. The tensile strength of the aluminum alloy material prepared by the invention can reach 290-310Mpa at 2.00-3.00mm, 275-295Mpa at 3.00-4.00mm, and 255-275Mpa at 4.00-5.00mm. The elongation rate of this monofilament is more than 3.0%, and the resistivity is less than 30.247nΩ.m.

The invention provides an Al-Mg-Zn-Cu alloy. The Al-Mg-Zn-Cu alloy comprises the following compositions in percentage by weight (wt%): 3.5-5.3% of Mg, 0.05-0.28% of Cu, 0.50-2.0% of Zn, 0.10-0.50% of Mn, 0.01-0.10% of Ti, less than or equal to 0.10% of Cr, less than or equal to 0.20% of Si, less than or equal to 0.30% of Fe, and the balance of Al and inevitable impurities. According to the Al-Mg-Zn-Cu alloy, the alloy has better firing and softening resistance property and forming property while the strength of the alloy is improved through Mg, Cu and Zn. Therefore, the Al-Mg-Zn-Cu alloy provided by the invention can meet the requirement of an automobile body on the strength and impact resistance when being used for an automobile body board, and has good in firing and forming properties.

The invention discloses an Al-Fe-Cu-Zr series aluminum alloy for cables for coal mines and an aluminum alloy cable. The aluminum alloy contains the ingredients in percentage by weight: 0.2-1.1% of Fe, 0.01-0.4% of Cu, 0.001-0.2% of Zr, 0-0.1% of Si, 0-0.2% of B, 0.001-0.15% of one element selected from Ca, Ni, Ti and Zn and the balance of Al and impurities. The aluminum alloy cable is produced through enabling the aluminum alloy to be subjected to the processes of melting, casting and rolling, so as to obtain aluminum alloy rods, then, carrying out drawing, stranding and softening, so as to form aluminum alloy wire cores, and then, carrying out extruded insulation, cabling and extruded sheathing or armoring on the conductor wire cores. The Al-Fe-Cu-Zr series aluminum alloy for the cables for the coal mines, disclosed by the invention, has the characteristics of high strength, high conductivity, good bending property and the like; the aluminum alloy cable produced from the aluminum alloy can meet the requirements on the properties of the cable in the field of the coal mines.

The invention discloses a low-yield-ratio high-toughness TMCP type bridge steel plate and a production method thereof. The steel comprises the following chemical components in percentage by weight of0.07 to 0.12% of C, 0.11 to 0.18% of Si, 1.42 to 1.52% of Mn, 0.008 to 0.015% of P, 0.002 to 0.010% of S, 0.08 to 0.16% of Cr, 0.012 to 0.018% of Nb, 0.008 to 0.016% of Ti, 0.020 to 0.050% of Alt, 0.002 to 0.005% of N, the balance iron and impurities and 0.350 to 0.369% of carbon equivalent. According to the production method, a continuous casting billet is subjected to heating, controlled rollingincluding recrystallization zone rolling, temperature waiting and non-recrystallization zone rolling and controlled cooling including ferrite zone cooling, temperature waiting and bainite zone cooling, and the bridge steel plate is manufactured. The obtained bridge steel plate is low in yield ratio, high in toughness and excellent in welding performance.

The invention belongs to the field of aluminum alloy production technologies, and relates to a technology capable of reducing generation of coarse grains on the surface of a vehicle extrusion-forged bar. An aluminum alloy is prepared from the raw materials in percentage by weight: 1.07-1.12% of Si, less than or equal to 0.1% of Fe, 0.01-0.04% of Cu, 0.62-0.65% of Mn, 0.88-0.93% of Mg, 0.15-0.18% of Cr, less than or equal to 0.03% of Zn, 0.02-0.05% of Ti, less than or equal to 0.03% of a single impurity, less than or equal to 0.1% of an impurity total, and the balance of Al, wherein the ratio of the Mg to the Si is 0.79-0.87. An aluminum alloy cast ingot prepared through the formula is subjected to solid solution heat treatment after extrusion, on-line water spray quenching treatment and stretch straightening, each technological parameter is controlled seriously, after an aluminum alloy extrusion bar is subjected to 545 DEG C*1 h solid solution heat treatment, the section has no the coarse grains, and the surface has no the coarse grains; and after the bar is forged, the thickness of a coarse grain layer of the section is less than or equal to 3 mm, and mechanical performance after170 DEG C*8.5 h can reach: the yield strength RP 0.2 is greater than or equal to 320 Mpa, the tensile strength Rm is greater than or equal to 360 Mpa, and the elongation percentage A is greater than or equal to 10%.

The invention belongs to the technical field of aluminum alloy, and relates to a formula and production technology of a high-strength aluminum alloy car body part. The high-strength aluminum alloy carbody part comprises, by mass, 0.1%-0.6% of Cu, 7.5%-10.0% of Si, 0.25%-0.45% of Mg, 0.15%-0.50% of Fe, 0.10%-0.20% of Ti, 0.20%-0.70% of Mn, 0.15%-0.35% of Cr, 0-0.15% of other impurities and the balance Al. By properly selecting the dosage of the Cu, Si, Mg, Fe, Ti, Mn and Cr, high-strength aluminum alloy can be obtained, the formula is simple, the mechanical properties are excellent, and the corrosion resistance is splendid.

The invention discloses a time-efficient reinforced aluminium alloy extrusion, which belongs to the field of a metal material. The aluminium alloy extrusion comprises components, by weight percentage: 0.75-0.90 of Mg, 0.5-0.6 of Si, 0.10-0.14 of Cu, 0.20-0.25 of Mn, 0-0.1 of Ti, 0-0.1 of Cr, 0.1-0.3 of Fe, and 0.20-0.28 of Zn, and is balanced with Al. According to the invention, alloy components are optimized; steps of melting and casting, homogenization, extrusion, thermal treatment, and surface treatment in production technology are optimized; and mechanical properties and the surface film quality are effectively improved.

The invention discloses a novel high-strength heat-resistant aluminium-alloy conductor. According to the invention, commercial-purity aluminium is used as a raw material, and traces of boron, antimony, manganese, copper and zirconium elements are added at 800+/-10 DEG C. the novel high-strength heat-resistant aluminium-alloy conductor comprises components of, by weight, 0.01-0.30% of boron, 0.05-0.60% of antimony, 0.02-0.80% of manganese, 0.05-2.30% of copper, 0.05-0.90% of zirconium and the balance pure aluminium and unavoidable impurities. The novel high-strength heat-resistant aluminium-alloy conductor is manufactured by a conventional alloy smelting technology. The prepared aluminium-alloy conductor has high strength, good heat resistance and excellent conductivity. Comprehensive performance of the conductor is raised effectively. The aluminium-alloy conductor can be widely applied in national electric transmission lines, especially a long-span long-distance transmission and transformation project.

The invention provides a low-alloyed high-performance superplastic magnesium alloy and a preparation method thereof. The chemical components of the low-alloyed high-performance superplastic magnesiumalloy comprises, by mass, 0.5-2.5% of zinc, 0.05-1.0% of argentum, 0.05-1.0% of calcium, 0.05-1.0% of zirconium and the balance magnesium. The gross of mass percent of the chemical components of alloyelements except magnesium is less than 3%. The preparation method for the low-alloyed high-performance superplastic magnesium alloy comprises four steps of gradient-temperature smelting, accurate andrapid solidifying, rolling technology and recrystallization treatment. According to the low-alloyed high-performance superplastic magnesium alloy and the preparation method thereof, a traditional superplastic magnesium alloy design principle is broken through; through combination of a multi-element small-amount alloy component design principle, an accurate and rapid solidifying method and the rolling technology, the superplastic magnesium alloy which is characterized by having low-alloyed high performance and being short in process and low in cost and the preparation method thereof are acquired; the tensile strength of larger than 300 MPa can be acquired by the alloy with components optimized; the elongation rate is larger than 15%; room-temperature performance is outstanding; and in addition, the alloy with components optimized has superplasticity, the elongation rate at the temperature of 300 DEG C is 300%, and the elongation rate at the temperature of 250 DEG C is 250%.

The invention provides a high-toughness and high-strength aluminum alloy hub for an automobile and a manufacturing method thereof, and relates to the technical field of automobile hub manufacturing. The aluminum alloy hub is prepared from the following components in percentage by mass: 3.3-4.8% of Si, 1.2-1.7% of Mg, 0.45-0.7% of Mn, 0.2-0.6% of V, 0.35-0.7% of Ti, 0.05-0.13% of Zr, 0.05-0.12% ofRE, and the balance of Al; RE is composed of Yb, Pr, Nd and Sc with the mass ratio being 1:(0.2 to 0.6):(0.3 to 0.8):(0.6 to 1.2). The manufacturing method comprises the steps of smelting, refining, casting, solid solution treatment, deep cold treatment, aging treatment and the like. The manufactured aluminum alloy hub is uniform and dense in structure, high in toughness, high in strength, good incorrosion resistance, high in dimensional stability, excellent in comprehensive performance and long in service life, and has great using prospects.

The invention discloses a high-strength and high-toughness weldable corrosion-resistant and abrasion-resistant steel plate and a preparation method thereof. According to the technical scheme, the steel plate comprises, by mass, 0.25-0.42% of C, 0.01-0.10% of Si, 1.35-1.75% of Mn, not greater than 0.005% of P, not greater than 0.002% of S, 0.35-0.55% of Mo, 0.07-0.19% of Ti, 0.12-0.25% of Zr, 0.0023-0.0045% of Mg, 0.015-0.025% of Als, 0.001-0.008% of B, 0.0025-0.0040% of N, 0.0005-0.0015% of O, and the balance Fe and trace impurity elements, wherein the ratio of Mo to Ti is 1.8-7.0, and the ratio of Ti to Als is 3-13. According to the high-strength and high-toughness weldable corrosion-resistant and abrasion-resistant steel plate and the preparation method thereof, the alloy adding amount is small, the welding performance is improved, and the production cost is reduced; and through whole-process technological control of rolling, online quenching, offline quenching and low-temperature tempering, the grain size is refined, precipitation and dispersion distribution of nanoscale Ti-containing second-phase particles are promoted, and the toughness and corrosion-resistant and abrasion-resistant performance of the product are improved.

The invention relates to a high-yield high-elongation-rate die-casting alloy material for a mobile phone medium plate and a preparation method thereof. The alloy comprises the following components of2.0wt%-4.0wt% of Si, 4.5wt%-6.8wt% of Mg, 0.6wt%-1.2wt% of Mn, 0.001wt%-1.0wt% of Ce, 0.001wt%-0.5wt% of Cr, 0.2wt%-1.0wt% of Fe, 0.05wt%-0.25wt% of Ti, 1.0wt% or below of the rest of the impurities and the balance Al. Compared with the prior art, the high-yield high-elongation-rate die-casting alloy material for the mobile phone medium plate and the preparation method thereof have the advantagesthat multi-element reinforced phases, namely, the Mn, the Si, the Mg and the Ce are added into the aluminum alloy, and multi-element reinforced phases Mg2Si, MnAl6, CeSi2 and Al11Ce3 are introduced, so that the yield strength and the elongation rate of the material are remarkably improved, and in case of the material when being applied to a thin wall, the yield strength reaches 250 MPa to 280 MPa,and the elongation rate reaches 6% to 12%.

The invention discloses Al-Fe-Cu aluminum alloy for a coal mine cable and an aluminum alloy cable. Aluminum alloy materials comprise, by weight, 0.2% to 1.1% of Fe, 0.01% to 0.4% of Cu, 0% to 0.1% of Si, 0% to 0.2% of B, 0.001% to 0.3% of trace elements, and the balance of Al and impurities. The aluminum alloy materials are processed through the smelting technology, the casting technology and the rolling technology so that an aluminum alloy rod can be obtained, then, the aluminum alloy rod is drawn, bunched into strands and softened so that an aluminum alloy cable core can be obtained, and next, the conductor cable core is subjected to extruded insulation, cabling and extruded jacketing or armoring so that the aluminum alloy cable can be made. The Al-Fe-Cu aluminum alloy for the coal mine cable has the advantages of being high in strength and electric conductivity, good in bending property and the like. The aluminum alloy cable made from the aluminum alloy can meet the requirements for the performance of the cable in the coal mine field.

The invention discloses a high-strength corrosion-resistant aluminum alloy for a variable-diameter drill pipe body and a manufacturing method of the aluminium alloy. The aluminium alloy comprises, inpercentage by weight, Zn: 5.5-6.3%, Mg: 2.5-3.1 %, Cu: 0.5 to 0.9%, Fe: <=0.2%, Zr: <= 0.15%, Ti: <=0.1%, Mn: 0.1 to 0.3%, Cr: 0.1 to 0.25%, and the balance being Al and unavoidable impurities. An aluminum alloy variable-diameter drill pipe body prepared by manufacturing method of the invention has high strength, good corrosion resistance and fatigue resistance, and the technical indexes such as dimensional precision and concentricity are high in control level, and the prepared drill pipe body is stable in quality, good in overall performance, low in cost and conducive to industrial batch production and field application.

The invention relates to a novel antirust aluminium alloy material. The aluminium alloy material comprises the following raw materials: Si, Fe, Cu, Mn, Mg, Zn, Zr, Be and Al. The novel antirust aluminium alloy material has the beneficial effects that the content of Zr in the novel antirust aluminium alloy material is moderate, so that the strength and plasticity of base materials and weld joints are obviously improved and the weldability is enhanced; meanwhile, Zr and Al form a ZrAl3 compound, so that a recrystallization process can be hindered and recrystallized grains can be refined; and by adding a small quantity of Zn to the novel antirust aluminium alloy material, the strength of the base materials and the weld joints can be effectively improved via the dispersion strengthening effects of the precipitated MgZn2 phase and Al2Zn3Mg3 phase, and the corrosion resistance of the base materials and the weld joints is optimal. Therefore, the novel aluminium alloy material has high mechanical strength and strong corrosion resistance and weldability, and solves the problem of gaps in the materials of large-scale all aluminium alloy high-speed ships (hovercrafts) in China.

The invention is suitable for the field of material processing, and provides an aluminum alloy and a preparation method thereof. The aluminum alloy comprises the following components in percentage bymass: 0.62-0.78% of silicon, 0.56-0.70% of magnesium, 0.15-0.20% of copper, 0.25-0.38% of manganese, 0.10-0.18% of chromium, 0.03-0.08% of vanadium, iron not more than 0.20% and more than 0, titaniumnot more than 0.03% and more than 0, and the balance of aluminum. In the aluminum alloy, through limiting of the contents of silicon, magnesium and copper fed elements, the product strength is improved when the extrusion performance of the aluminum alloy is not reduced; and meanwhile, through feeding of such elements as manganese, chromium and vanadium and cooperation with subsequent process treatment, dispersion separation mass points can be generated to achieve an effect of inhibiting recrystallization in the extrusion process, that is, the product strength and ductility are further improved, and prepared products achieve higher strength, ductility, stress corrosion resistance and extrusion performance.