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

The invention provides aluminum alloy, which comprises the following components: 4.0-6.0wt% of Mg, 0.20-0.50wt% of Cu, 0.05-0.30wt% of Mn, 0.05-0.30wt% of Fe, 0.03-0.15wt% of Si, less than or equal to 0.10wt% of Cr, less than or equal to 0.10wt% of Zn, 0.01-0.10wt% of Ti and balance of Al and inevitable impurities. In the aluminum alloy, the Mg not only guarantees the strength of the aluminum, but also meets the requirements on plasticity and corrosion resistance when the aluminum alloy is used for making automobile body plates; and the Cu can further improve the strength of the prepared aluminum alloy and can enable the aluminum alloy to have better baking softening resistance and forming performance. Therefore, the aluminum alloy provided by the invention has good baking performance and forming performance.

A semi-solid die-casting aluminum alloy material comprises 6%-9% of Si, 0-0.3% of Cu, 0.25%-0.55% of Mn, 0.2%-0.5% of Mg, 0.6%-1.2% of Fe, 0-0.15% of Ni, 0-0.15% of Zn, 0-0.15% of Pb, 0-0.05% of Sn, 0-0.2% of Ti, 0-0.15% of impurities, and the balance Al. The content of Si is controlled to be 6%-9% and the content of Fe is controlled to be 0.6%-1.2%, so that the good die-casting molding performance, corrosion resistance and demoulding effect are ensured; meanwhile, 0.25%-0.55% of Mn is added to form a MnAl6 compound, so that the harmful effect of iron is effectively weakened; also, Mn can hinder the recrystallization process of aluminum alloy, the recrystallization temperature is increased, and favorable conditions are provided for the semi-solid pulping process of alloy slurry; in addition, 0.2%-0.5% of Mg is contained properly so as to improve the tensile strength.

The thermal treatment process for an aluminum-magnesium-manganese wrought aluminum alloy containing erbium belongs to the filed of metal alloys. The existing aluminum alloy thermal treatment process has the problems of strength reducing, corrosion resisting performance reducing after long term use, etc. The invention aims at providing the thermal treatment process for an aluminum-magnesium-manganese cold-rolled sheet containing erbium, which is realized by homogenizing annealing, hot rolling, cold rolling, stabilizing annealing and other process steps, wherein the stabilizing annealing process comprises the steps that, a cold-rolled sheet is annealed at the temperature of 100-400 DEG C and insulated for 1-48h; the annealing temperature and the insulating time are preferably 125-250 DEG C and 1-8h respectively. The thermal treatment process of the invention ensures the alloy to acquire excellent corrosion resisting performance under the condition that the high plasticity of the aluminum-magnesium-manganese cold-rolled sheet containing erbium is kept at a higher level; the treated alloy can be used for a long time with basically constant performance, and the service range of the alloy is wide.

The invention discloses a formula for casting aluminum alloy hubs. The formula is prepared from, by weight, 6.5-7.5% of Si, 0.28-0.45% of Mg, 0-0.12% of Fe, 0-0.02% of Cu, 0.02-0.05% of Mn, 0.04-0.05% of Zn, 0.10-0.20% of Ti, 0.2-0.6% of Sr, 0.01-0.05% of Cr, 0.01-0.02% of Zr, 0.025-0.05% of B, 0.4-0.8% of mixed light rare earth and the balance Al. Due to the fact that Sr and the mixed rare earth metal serve as an alterant together, the surface defects of alloy phases can be overcome, surface tension on a new-phase interface and an old-phase interface is reduced, and the problem that compactness is reduced when only Sr is added is avoided. Zr, Ti, Cr and Al work together, the cast structure is further refined, and the hardness and the toughness of aluminum alloy are improved.

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 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 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 Al-Fe-Mg-Zr aluminum alloy used for coal mine cables. The Al-Fe-Mg-Zr aluminum alloy comprises 0.2 percent-1.1 percent of Fe, 0.01 percent-0.4 percent of Mg, 0.001 percent-0.2 percent of Zr, 0 percent-0.1 percent of Si, 0 percent-0.2 percent of B and the balance being Al and impurities, wherein the resistivity of the aluminum alloy is not larger than 0.028164 omega*mm<2> / m, the elongation at break is not lower than 10 percent, and ninety-degree fatigue bending frequency is larger than or equal to thirty. The aluminum alloy material is smelted, cast and rolled, so that an aluminum alloy rod is obtained; afterwards, the aluminum alloy rod is subjected to pulling, bunch stranding and softening, so that an aluminum alloy cable core is formed; next, the cable core is subjected to extruded insulation, cabling, sheath extrusion or armoring, so that an aluminum alloy cable is manufactured. The manufactured aluminum alloy cable has the advantages of being high in strength, high in electric conductivity, good in bending performance and the like, and therefore the requirements for cable performance in the field of coal mines can be satisfied.

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 relates to a five-layer aluminum alloy composite board and a composite method. The structure of the composite board is 4xxx / 3003mod1 / 3003mod2 / 3003mod1 / 4xxx, wherein the 3003mod2 comprises the components of not greater than 0.15% of Si, not greater than 3.0% of Fe, 0.5%-0.8% of Cu, 1.3-1.85% of Mn, 0.05-0.15% of Ti, and the balance Al and inevitable impurities of which the total amount is less than 0.15%, and the 3003mod1 comprises the components of 0.45-0.8% of Si, 0.1-0.6% of Fe, 1.3-1.8% of Mn, 2.0-3.0% of Zn, 0.05-0.15% of Zr, and the balance Al and inevitable impurities of which the total amount is less than 0.15%. According to the five-layer aluminum alloy composite board and the composite method, the components and the structure are improved, and therefore the purpose of protecting a core material can be achieved, the strength of an alloy can be improved, meanwhile, the post-weld strength of the material can be improved, in addition, the composite method is simple and easy to realize, and the obtained five-layer aluminum alloy composite board is low in cost.

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 belongs to the technical field of aluminum alloy manufacturing and relates to a stabilizing processing technology for a 5052 aluminum alloy. The 5052 aluminum alloy is prepared from thefollowing elements in percentage by weight: 0.10-0.15% of Si, less than or equal to 0.5% of Fe, less than or equal to 0.005% of Cu, 0.01-0.05% of Mn, 2.0-2.5% of Mg, 0.20-0.25% of Cr, less than or equal to 0.005% of Zn, 0.01-0.05% of Ti, less than or equal to 0.05% of single impurities, less than or equal to 0.15% of total impurities and the balance of Al. The technology comprises the following steps: saw cutting and milling a 5052 aluminum alloy cast ingot; feeding the 5052 aluminum alloy cast ingot after saw cutting and milling into a heating furnace to be heated at 480-520 DEG C for 3-5 hours; discharging the heated 5052 aluminum alloy cast ingot to be hot-rolled; cooling the hot-rolled intermediate panel to room temperature and cold-rolling the intermediate panel, wherein the cold-rolling deformation rate is 30-70%; and stably annealing the cold-rolled aluminum alloy panel at 180-250 DEG C for 2-8 hours. The technology solves the problem that process control in actual production isnot facilitated as an existing 5052 aluminum alloy processing technology window is relatively narrow.

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 discloses Al-Fe-Cu-Mg-Mn aluminum alloy used for coal mine cables and an aluminum alloy cable. The aluminum alloy material comprises, by weight, 0.2 percent-1.1 percent of Fe, 0.01 percent-0.4 percent of Cu, 0.01 percent-0.4 percent of Mg, 0.001 percent-0.1 percent of Mn, 0 percent-0.1 percent of Si, 0 percent-0.2 percent of B and the balance being Al and impurities. The aluminum alloy material is smelted, cast and rolled, so that an aluminum alloy rod is obtained; afterwards, the aluminum alloy rod is subjected to pulling, bunch stranding and softening, so that an aluminum alloy cable core is formed; next, the cable core is subjected to extruded insulation, cabling, sheath extrusion or armoring, so that the aluminum alloy cable is manufactured. The Al-Fe-Cu-Mg-Mn aluminum alloy used for the coal mine cables has the advantages of being high in strength, high in electric conductivity, good in bending performance and the like; the aluminum alloy cable made of the aluminum alloy can meet the requirements for cable performance in the field of coal mines.

The invention discloses a high-performance aluminum alloy for casting thin-walled structural parts and a preparation method of the high-performance aluminum alloy. The aluminum alloy is prepared fromthe following components in percentage by weight: 9.5-11.0% of Si, less than or equal to 0.15% of Fe, 0.26-0.35% of Mg, less than or equal to 0.05% of Zn, 0.5-0.6% of Mn, less than or equal to 0.03% of Cu, 0.05-0.15% of Ti, less than or equal to 0.002% of Ca, less than or equal to 0.002% of Na, less than or equal to 0.002% of P, less than or equal to 0.005% of Sb, 0.010-0.025% of Sr, less than orequal to 0.01% of Cd, less than or equal to 0.001% of Li and the balance of Al. According to the high-performance aluminum alloy for casting the thin-walled structural parts and the preparation methodof the high-performance aluminum alloy, design and study are carried out in terms of composition design, material selection, purification treatment, casting process and the other aspects, and the aluminum alloy with greater than or equal to 220 MPa of tensile strength, greater than or equal to 130 MPa of yield strength and greater than or equal to 6.0% of elongation is provided, and can meet theproduction demand of automobile shock absorber towers.

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 a high-strength graphene and rare-earth aluminium alloy. The grapheme and rare-earth aluminium alloy comprises an aluminium alloy matrix and graphene. The composition of the aluminium alloy matrix comprises, by mass, 1.2-1.8% of Cu, 0.18-0.25% of Si, 0.08-0.2% of Cr, 0.6-0.8% of Mg, 0.1-0.2% of Mn, 0.3-0.4% of Fe, 0.3-0.5% of Zn, 0.02-0.06% of Ti, 0.1-0.2% of V, 0.1-0.2% of Ni, 0.04-0.07% of Mo, 0.05-0.12% of Zr, 0.04-0.08% of Nd, 0.04-0.06% of La, 0.03-0.05% of Ce, and the balance Al. The high-strength graphene and rare-earth aluminium alloy has good mechanical properties such as strength, toughness and the like.

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 relates to a high-strength die-casting aluminum alloy material for a mobile phone middle plate and a preparation method of the high-strength die-casting aluminum alloy material. An alloycomprises, by weight, 6%-8% of Si, 1.5%-3.0% of Mg, 0.2%-1.8% of Mn, less than 2.5% of Cu, less than 0.5% of Fe, 0.01%-0.2% of Ti, 0.005%-0.1% of Sr, less than 1.0% of Zn, less than 0.8% of Y, less than 0.5% of Ce and the balance Al, wherein the weight percentage sum of remaining impurities is controlled to be less than 1.0%. Compared with the prior art, according to the high-strength die-castingaluminum alloy material and the preparation method thereof, the elements of Si, Mn, Cu and Mg are added to the aluminum alloy, three strengthening phases, namely Mg2Si, MnAl6 and Al2Cu, and a binaryprecipitated phase are introduced, and the yield strength of the material is remarkably improved; meanwhile, the elements Y and Ce are doped into the aluminum alloy, and the elongation of the die-casting alloy is increased; meanwhile, stable hydride can be formed, the hydrogen fixation effect is achieved, the hydrogen content of a substrate of the aluminum alloy is decreased, and the pinhole degree of the substrate of the aluminum alloy is lowered; and elongation of the die-casting alloy is further increased.

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.