147 results about "International Annealed Copper Standard" patented technology

The invention relates to a high-conductivity aluminum alloy material for a cable and a preparation method thereof. The aluminum alloy material comprises the following components in percentage by weight: 0.25-0.80 percent of iron element, 0.02-0.15 percent of boron element, 0.1-1.5 percent of rare earth element and the balance of aluminum and inevitable impurities. The aluminum alloy is formed by adding an aluminum alloy intermediate alloy, an aluminum-boron alloy and an aluminum-rare earth intermediate alloy into an aluminum ingot of which the purity is more than 99.80 percent by weight and carrying out a casting process and annealing treatment on the mixture. Compared with a common electric aluminum conductor, the prepared aluminum alloy conductor has more excellent conductive performance and the conductivity reaching or exceeding 62.5 percent IACS (International Annealed Copper Standard); the aluminum alloy conductor treated by using a special process has excellent flexibility and creep resistance; and compared with a common electric aluminum conductor, the prepared aluminum alloy material used as a cable extrusion insulating lead core is more energy-saving and safer.

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.

The invention relates to a method for directly producing high-purity oxygen-free copper by pyrogenic process continuous refining of scrap copper, and belongs to the technical field of non-ferrous metallurgy. The method comprises the following steps: by taking scrap copper as a raw material; analyzing the component characteristics of each batch of raw material, and then preparing into a mixture, wherein the mass percent of a copper element in the mixture is greater than or equal to 93%; adding metaphosphate or phosphorus pentoxide and flux to the mixture; refining by oxidation; stewing and drossing after oxidation is finished, and then orderly carrying out reduction refining and refining agent refining under an agitation state, so as to obtain the high-purity oxygen-free copper of which the copper content is greater than or equal to 99.95% and the oxygen content is smaller than 0.003%, wherein the electrical resistivity of the obtained copper wire after drawing is below 0.017241omega/(mm), and the relative electrical conductivity is over 100% of International annealed copper standard (IACS). The method is strong in flexibility, significant in refining effect, and applicable to different components of scrap copper materials; the scrap copper can be used for directly making a rod after being refined. Compared with the traditional pyrogenic process smelting-electrolytic refining-copper cathode purification process, the method disclosed by the invention has the beneficial effects that the flow is shortened, the cost is reduced, the energy is saved, and continuous operation is achieved.

The invention provides a preparation method of a fine-grained CuCr alloy, which comprises the processing steps that (1) an oxygen-free copper block and a chromium block are subjected to induction heating to be molten and dissolved mutually, molten liquid is ejected by argon gas pressure and subjected to centrifugal atomization by a copper roller rotation quenching melt spinning or a water-cooling rotating disk; (2) a fine-grained CuCr alloy material is subjected to ball milling by a high-energy ball mill under argon shield; (3) fine-grained composite CuCr alloy powder is loaded into a mould briquette to be made into a green blank; and (4) the green blank is loaded into a graphite drying pot, and placed in a vacuum sintering furnace to be sintered to form the fine-grained CuCr alloy. In the fine-grained CuCr alloy prepared by the method, the particle sizes of chromium particles are 0.5-10 micrometers, the surface hardness is 65-162HV, and the conductivity is 26.0-80.8% IACS (International Annealed Copper Standard); compared with the existing CuCr alloy with the equivalent chromium content, the particle sizes are reduced obviously, and the alloy performance is improved significantly; and the fine-grained CuCr alloy has more excellent effect in an application of an electrical contact material.

The invention discloses a method for manufacturing a medium-strength aluminum alloy wire with the electric conductivity of 59 percent (International Annealed Copper Standard, IACS), and relates to a method for manufacturing a medium-strength aluminum alloy wire with high conductivity. The method is characterized by comprising the following steps of: (1) selecting an aluminum matrix and an aluminum intermediate alloy ingot; (2) performing on-the-spot sample analysis and adjustment, namely putting the selected aluminum ingot into a shaft furnace, melting to form molten aluminum, and refining by using a refining agent; (3) casting and crystallizing, namely allowing molten aluminum alloy in a kettle furnace to pass through a runner and filtering by using a ceramic filtering plate, adding rare earth to ensure that the content of the rare earth is 0.05 to 0.15 percent, feeding into an aluminum alloy continuous casting machine, performing continuous casting to form an aluminum alloy cast ingot, and rolling a medium-strength alloy rod by using an aluminum alloy continuous mill; (4) performing solid solution treatment and quenching, namely performing thermal homogenization treatment on the aluminum alloy rod; and (5) drawing, aging and twisting, namely drawing the aluminum alloy rod treated in the previous working procedure into an aluminum alloy wire with the required diameter on an aluminum alloy wire drawing machine, and twisting on a frame type wire twisting machine to obtain the medium-strength aluminum alloy wire with the electric conductivity of 59 percent IACS.

The invention discloses a heat-resistant aluminum alloy conductor with high strength and high conductivity and a preparation method thereof. The conductor comprises the following elements in percentage by weight: 0.15-0.60% of zirconium (Zr), 0.03-0.30% of lanthanum (La), 0.03-0.30% of cerium (Ce), 0.01-0.30% of yttrium (Y), 0.05-0.20% of ferrum (Fe), 0.01-0.10% of silicon (Si), not more than 0.10% of other impurity elements and the balance of aluminum. The method comprises the following steps of: preparing raw materials; putting the raw materials into a smelting furnace; heating, degassing and smelting the raw materials; making slag; removing the slag; continuously casting and rolling the raw materials to obtain a heat-resistant aluminum alloy rod; carrying out heat treatment on the heat-resistant aluminum alloy rod; and drawing the heat-resistant aluminum alloy rod by using a wire drawing machine so as to obtain a single heat-resistant aluminum alloy wire. The heat-resistant aluminum alloy conductor disclosed by the invention has the characteristics as follows: the tensile strength reaches 160 MPa, the electric conductivity can reach more than 61% IACS (International Annealed Copper Standard), the long-term operation temperature can reach 180 DEG C, the conductor stands up to examining operation while being heated for one hour at 280 DEG C, and strength survival rate is more than 90%.

The invention provides an interlocking type armored optical fiber composite low-voltage cable of a creep-resistant aluminum alloy conductor. The interlocking type armored optical fiber composite low-voltage cable comprises a conductor, an optical unit and an armor, wherein the conductor is the creep-resistant aluminum alloy conductor; and the armor is aluminum alloy strip interlocking type armor. The interlocking type armored optical fiber composite low-voltage cable has the advantages that: the conductivity can reach over 61 percent of International annealed copper standard (IACS); the conductor has excellent mechanical property; the rebound performance of the conductor is 40 percent lower than that of a copper cable; the flexible performance is 25 percent higher than that of the copper cable; and the weight of the conductor is half of that of the copper cable; when an alloy cable is used, the installation cost is directly reduced for a construction organization; an S-type interlocking type armor structure is used; the armored cable has high softness, and high strength; the minimum bending radius of the armored cable is 7D; the cable is reliable in connection, light in weight, small in bending radius, convenient for installation, good in radiation, bridge saving and resource saving; compared with common copper core low-voltage cable, the cable has obvious cost advantage, and saves large amount of copper; and the economical efficiency of the creep-resistant aluminum alloy interlocking type armored optical fiber composite low-voltage cable (OPLC) is adaptable to tendency of establishing the resource-saving society in China.

The invention relates to high-performance elastic copper alloy and a preparation and processing method thereof. According to the weight percentage, the high-performance elastic copper alloy comprises the basic components as follows: 1 to 4 percent of Ni, 0.4 to 1 percent of Si, 0.5 to 1.5 percent of Co, and the rest percent of Cu, wherein the components in a copper alloy product need to satisfy the conditions as follows: (a) the content of Ni or Si is larger than or equal to 2.5 percent and smaller than or equal to 5 percent; (b) the content of Ni plus Si is larger than or equal to 1.4 percent and smaller than or equal to 4.0 percent; (c) the content of Ni plus Co is larger than or equal to 1.5 percent and smaller than or equal to 4 percent; and (d) the content of Ni plus Si or the content of C is larger than or equal to 1 percent and smaller than or equal to 5.0 percent. The preparation and processing method of the high-performance elastic copper alloy comprises the step: a, material burdening, material feeding, melting and casting which are conducted according to the weight percent; b, surface milling; c, hot rolling; d, solid solution treatment; e, cold processing; f, primary aging; g, cold processing; h, secondary ageing; i, pickling; and j, finished product annealing. The tensile strength Sigma b of the copper alloy is 780 to 950MPa, the plastic elongation rate Delta of the copper alloy is 4 to 10 percent, and the electric conductivity of the copper alloy is 35 to 55 percent according to an international annealed copper standard (IACS). The copper alloy has the advantages of high elasticity, high strength, high fatigability, good heat resistance and high electric conductivity.

The invention discloses a high-strength and high-conductivity rare-earth copper alloy and a preparation method of the high-strength and high-conductivity rare earth copper alloy. The high-strength and high-conductivity rare-earth copper alloy belongs to the technical field of an alloy material. Silver, phosphorus and a trace of rare-earth elements are added on the basis of a traditional Cu-Cr-Zr alloy. The copper alloy is prepared from the following components in percentage by weight: 0.2-1.0% of chrome, 0.1-0.4% of zirconium, 0.1-0.2% of silver, 0.02-0.03% of phosphorus, 0.02-0.16% of the rare-earth elements, and the balance of copper and inevitable impurity elements; the rare-earth elements are one or two or three of cerium, iridium and neodymium; a material is carried out processes such as hot forging, solid-solution treatment, cold rolling and aging treatment; prepared copper alloy has a good overall performance; tensile strength is greater than 550MPa; hardness is greater than 150HV; an elongation rate is greater than 10%; electric conductivity is greater than 80% IACS (International Annealed Copper Standard), and a softening temperature is greater than 450 DEG C. A requirement of the material for an electronic industrial field on the performance of the copper alloy can be better met; the high-strength and high-conductivity rare-earth copper alloy can be used for a lead frame material for a large-scale integrated circuit, a contact line of an electric car or an electric locomotive, an electrode alloy connector and the like.

The invention provides a preparation method of an intermediate strength aluminum alloy monofilament with 59% IACS (International Annealed Copper Standard) conductivity and belongs to the technical field of overhead conductors of electric transmission lines in the power industry. The intermediate strength aluminum alloy monofilament provided by the invention solves the technical problem that the existing intermediate strength aluminum alloy is complex in production process, high in cost and poor in mechanical property and conductivity of the product. The intermediate strength aluminum alloy monofilament is developed mainly by adding microalloying elements to control the content of impure elements in the alloy and adjusting the microstructure of the alloy in a thermal treatment process, wherein the conductivity is not less than 59% IACS (20 DEG C), the tensile strength is not less than 240MPa and the ductility is not less than 3.5%.

A resistive welding electrode includes at least a weld face constructed of a refractory-based material that exhibits an electrical conductivity that is less than or equal to 65% of the electrical conductivity of commercially pure annealed copper as defined by the International Annealed Copper Standard (IACS). A method of using the resistive welding electrode to resistance spot weld a workpiece stack-up that includes an aluminum alloy workpiece and steel workpiece that overlap and contact each other at a faying interface is also disclosed.

The invention provides 80-100mm hardenability aluminium alloy with the super strength of 690-730Mpa and a preparation method thereof. The 80-100mm hardenability aluminium alloy is characterized by mainly comprising aluminum, zinc, magnesium, copper, zirconium and strontium, wherein the mass percent of the zinc is 10.78-13.01%, the mass percent of the magnesium is 2.78-3.51%, the mass percent of the copper is 2.26-2.80%, the mass percent of the zirconium is 0.204-0.24%, the mass percent of the strontium is 0.0025-0.0751%, and the rest is aluminium and few impurity elements. The preparation method comprises the following steps: (1) casting; (2) carrying out homogenizing annealing (400 DEG C*6h+420 DEG C*6h+440 DEG C*6h+460 DEG C*12h); (3) carrying out hot extrusion (the extrusion ratio is 12); (4) carrying out solution treatment (450 DEG C*2h+460 DEG C*2h+470 DEG C*2h); and (5) carrying out aging treatment (121 DEG C*24h). The aluminium alloy has the advantages that the crystal particles of the aluminium alloy are very small (the average crystal particle size is less than 10 micrometers), the highest actual measurement strength of the aluminium alloy can reach 731 Mpa, meanwhile, the percentage of elongation of the aluminium alloy is 6.6%, the hardness of the aluminium alloy is 231.1HV, the electrical conductivity of the aluminium alloy is 25.9% IACS (International Annealed Copper Standard), and the end-quenching hardenability of the aluminium alloy in water is 80mm.

The invention relates to the field of a metal alloy, in particular to a Cu-Ni-Si alloy. A fabrication method of a copper alloy comprises the steps as follows: A) casting, B) hot rolling, C) face milling and D) cold rolling and annealing. The copper alloy comprises the following chemical components by mass percent: 1.8-2.1% of nickel, 0.4-0.68% of silicon, 0-0.2% of iron, 0-0.1% of manganese, 0-0.2% of zinc, 0-0.005% of cadmium, 0-0.02% of lead, 0-0.3% of other impurities and the balance of cooper, wherein iron, manganese, zinc, cadmium and lead are all impurities; the tensile strength Rm of the copper alloy is greater than or equal to 600MPa; the broken elongation A11.3 is greater than or equal to 8%; the Vickers hardness HV is greater than or equal to 180; and the electrical conductivity is greater than or equal to 46% IACS (International Annealed Copper Standard). The ideal performance of a copper alloy material for a lead frame can be obtained by the fabrication method for the copper alloy.

The invention relates to a high-strength, high-conductivity and heat-resistant aluminum alloy conductor material and a preparation method thereof, and belongs to the technical field of alloy materials. The conductor material comprises the following components in percentage by weight: 0.2 to 0.3 percent of Zr, 0.15 to 0.25 percent of Er, less than 0.3 percent of impurities and the balance of aluminum. The preparation method comprises the following steps of: adding an AlEr intermediate alloy and an AlZr intermediate alloy in the process of smelting the aluminum, smelting at the temperature of 780+/-10 DEG C, preserving heat for 30 minutes, and casting; and performing homogenization treatment, rolling and heat treatment on an ingot in turn. Er and Zr in the component ratio are compositely microalloyed, a large number of precipitated phases which are distributed in a dispersed mode can be precipitated by the process, a large number of deformation structures can be stored, and the high conductivity (59.6 to 60 percent international annealed copper standard IACS), high strength (Vickers hardness 62.5 to 66.5) and heat resistance (capability of resisting the temperature of 375 DEG C in a short term and resisting the temperature of 225 DEG C in a long term) of the alloy are kept simultaneously.

The invention relates to the field of electronic packaging manufacturing, in particular to a lead wire frame for packaging a chip. Particularly, the lead wire frame is mainly applied to an SOT (Small-outline Transistor) series. A production method of the lead wire frame comprises the steps of A) stamping, B) electroplating and C) forming, wherein in Step A), a copper alloy sheet is taken for stamping through a male die and a female die of a cutting die to form a semi-finished lead wire frame; the tensile strength Rm of the copper alloy sheet is greater than or equal to 600MPa; the elongation after rupture A11.3 is greater than or equal to 8%; the vickers hardness HV is greater than or equal to 180; the electrical conductivity is greater than or equal to 46% IACS (International Annealed Copper Standard); and the thermal conductivity is greater than or equal to 190w/m*k; in Step B), the semi-finished lead wire frame is subjected to the following treatment sequentially: namely preelectrosilvering, electrosilvering and silver drawing; and in Step C), the electroplated semi-finished lead wire frame is subjected to cutting forming. The lead wire frame has a better mechanical property and a better thermoelectrical property.

The invention relates to a high-strength high-conductivity heat-resistant aluminum alloy wire. The wire consists of the following raw materials by weight percent: 98.5 to 99.6% of aluminum Al, 0.1 to 0.4% of lanthanum La, 0.1 to 0.4% of cerium Ce, 0.1 to 0.4 % of scandium Sc, 0.01 to 0.2% of Ferrum Fe, 0.01 to 0.1% of silicon Si, and less than 0.01% of titanium Ti, vanadium V, manganese Mn, chromium Cr and other impurity elements all together. Compared with the aluminum alloy wire in the prior art, the aluminum alloy wire of the invention has high strength and high conductivity simultaneously, the tensile strength reaches over 255 Mpa, the electric conductivity can reach over 60.0% IACS (International Annealed Copper Standard), and the high-strength high-conductivity heat-resistant aluminum alloy wire with the heat resistance reaching more than 180 DEG C during long-term running can effectively improve the power transmission capability of conducting wire and simultaneously widen the spacing between conducting wire towers, thereby furthering lowering the investment cost. The aluminum alloy wire has small sag, and the span of an iron tower can be increased by 30% in general. The high-strength high-conductivity heat-resistant aluminum alloy wire can be used in densely populated urban areas. In the process of the invention, both the burning loss of a variety of elements and the oxidation of materials can be reduced by adopting an intermediate frequency furnace for smelting, the smelting time is relatively short so as to raise the productivity, and long-time thermal treatment is not required in the production process, so the cost is saved.

The invention relates to a dispersion strengthening copper-based composite material and a preparation method thereof. The dispersion strengthening copper-based composite material and the preparation method thereof are characterized in that A dispersion strengthening phase is yttrium oxide, and the content of yttrium oxide in copper is 1-2.5 percent by weight, and the preparation method comprises the processes of alloy smelting, rolling, internal oxidation, reduction and the like. The preparation method has the advantages of short process and low production cost. The tensile strength of the product is greater than 550 MPa, the conductivity exceeds 90 percent IACS (international annealed copper standard), and the softening temperature is higher than 900 DEG C. The dispersion strengthening copper-based composite material has higher mechanical property, excellent electrical conductivity and high-temperature softening resistance. The Y2O3 granulate dispersion strengthening copper-based composite material prepared in the invention can be applied to computer integrated circuit lead frames, resistance welding electrodes for automobile industry, linings of crystallizers of continuous casting machines for metallurgical industry, equipment and carrier rockets, electric car and electric power train aerial conductor and the like, and the character of service and the service life can be obviously improved.

The invention discloses a creep-resistant and corrosion-resistant aluminum alloy conductor. The creep-resistant and corrosion-resistant aluminum alloy conductor comprises, by weight, 0.03-0.15% of Si, 0.01-0.25% of Cu, 0.02-0.45% of Zr, 0.3-0.9% of Fe, 0.001-0.012% of Mg, 0.001-0.015% of B, 0.03-0.20% of rare earth elements, the balance aluminum and the balance inevitable impurities. The creep-resistant and corrosion-resistant aluminum alloy conductor has the advantages that the conductivity of the aluminum alloy conductor material can reach 61.9% IACS (international annealed copper standard), the tensile strength of the aluminum alloy conductor material can reach 126MPa, the breaking elongation of the aluminum alloy conductor material can reach 15.6%, and the creep-resistant and corrosion-resistant aluminum alloy conductor is excellent in electrical conductivity, flexibility, corrosion resistance and creep resistance.

The invention provides a method for preparing dispersion-strengthened copper with high strength and high conductivity and belongs to the technical field of an oxide dispersion-strengthened material. The method comprises the following steps of: taking an electronic circuit board containing copper etching effluent (HW22) as a raw material; adding a soluble salt corresponding to a dispersion phase (one, two or more of Al2O3, Y2O3, MgO2, ZrO2 and ThO2); preparing Cu(OH)2/X(OH)n compound powder according to a chemical neutralizing sediment technology; and performing roasting, selective reduction and compacting technology, thereby obtaining the nanometer oxide dispersion-strengthened copper. The prepared nanometer oxide dispersion-strengthened copper has high strength, high conductivity and excellent high-temperature softening resistance, wherein the tensile strength at room temperature is above 600MPa, the electric conductivity is more than 80% of IACS (International Annealed Copper Standard), and the softening temperature is above 700 DEG C. The method provided by the invention has the advantages of simple process, short flow, low energy consumption, rich and easily obtained raw material and low cost, and is suitable for large-scale industrial production.

The invention provides a casting method of a highly-conductive and heat-resisting electrode cross beam component. The method comprises the following steps of: 1. selecting alloy materials; 2. manufacturing a metal mold according with sizes of the component; 3. founding and forming casting alloy materials; 4. and performing thermal process to cast formed pieces; wherein the composition ingredientsof the adopted alloy materials include elements of Al, Mg, Si, Zr, Ce and B; the mass percent content of each composition ingredient contains 0.5-1.0% of Mg, 0.4-0.8% of Si, 0.6-0.8% of Zr, 0.05-0.1%of Ce, and 0.03-0.06% of B; the allowance is Al and inevitable impurities; the mass percent ratio of the impurity elements contained in the alloy materials is that: Fe is less than or equal to 0.2%, Cu is less than or equal to 0.05%, Mn is less than or equal to 0.02%, Cr is less than or equal to 0.02%, Zn is less than or equal to 0.05% and Ti is less than or equal to 0.05%. With the casting method, the aluminum alloy electrode cross beam component with good thermal resistance, mechanical property and high electrical conductivity performance can be cast, the electric conductivity can be up to 45% IACS (International Annealed Copper Standard), the temperature can be up to 250 DEG C in long-term application, and the casting method can be used for manufacturing the electrode cross beam components needed by the industrial field of electrolytic zinc.

The invention relates to low-beryllium elastic copper alloy and a preparation and manufacture method thereof. The low-beryllium elastic copper alloy comprises by mass: 0.2-0.4% of Be, 1.3-2.6 % of Ni and the balance Cu, wherein the mass ratio of the Ni to the Be in the beryllium copper alloy is larger than or equal to 5.5 and smaller than or equal to 6.5. The alloy can further contain Cr and Zr. The preparation method of the low-beryllium elastic copper alloy comprises alloy component design, casting, hot rolling, solution treatment, rolling deformation and ageing treatment. The alloy is low in Be content (smaller than 0.5%) and can effectively save metal beryllium, the tensile strength of the alloy after deformation ageing treatment can reach 968MPa, conductivity is larger than 55% according to the international annealed copper standard (IACS), and the rate of resistance to stress relaxation is larger than 85%. Therefore, the low-beryllium elastic copper alloy can serve as a conductive elastic material which has high elasticity, high strength and excellent resistance to stress relaxation, can be applied to electrical contact components, connectors, relays and the like, and has wide application prospects.

The invention discloses a preparation method for a rare earth oxide particle reinforced high-conductivity copper alloy. The preparation method comprises the following steps: after copper oxide, rare earth oxide powder, stearic acid serving as a PCA (Process Control Agent) and zirconia grinding media are dried, placing the dried copper oxide, the rare earth oxide powder, the stearic acid serving as the PCA and the zirconia grinding media into a ball grinding tank for performing ball grinding; placing powder which is subjected to the ball grinding into a tube furnace, introducing reducing atmosphere, heating and performing heat preservation, wherein the heat preservation temperature is 500 +/- 10 DEG C, and the heat preservation time is 4+/-0.5 h; sintering a graphite mould which is filled with the reduced powder in a discharge plasma sintering furnace, and cooling to obtain the rare earth oxide particle reinforced high-conductivity copper alloy. Through testing of comprehensive performance, the maximum yield strength is 269.8 MPa, and the electrical conductivity at normal temperature is 82.5 percent IACS (International Annealed Copper Standard).

The invention discloses a method for processing a copper rube having a circular inside and a quadrate outside. The method comprises the steps of: 1) adopting high-pure cathode copper as a raw material and vacuum up-drawing in a clutch type way and continuously casting an oxygen-free copper rod by using a dragger group; 2) processing the oxygen-free copper rod from step 1) to form a copper tube blank having the circular inside and the quadrate outside by a continuous extruding machine group; 3) stretching the copper tube blank having the circular inside and the quadrate outside formed in step 2) by a high-precision stretcher; 4) annealing the stretched copper tube blank having the circular inside and the quadrate outside obtained in step 3) by bright annealing equipment; and 5) inspecting and packing the annealed copper tube blank having the circular inside and the quadrate outside obtained in step 4). The method provided by the invention has the characteristics of being low in energy consumption, high in yield, high in production efficiency, and long in the product length. In the method, the sum of content of copper and silver is not less than 99.99%; the content of oxygen is not more than 5ppm, and the electric conductivity is not less than 101% IACS (International Annealed Copper Standard).

The invention relates to a preparation method of high-strength and high-conductivity copper alloy. The preparation method comprises the following steps: (1) solid-solution treatment and hot rolling; (2) cold rolling and annealing at a normal temperature; (3) low-temperature treatment; and (4) quick deformation treatment and final annealing. According to the preparation method of the high-strength and high-conductivity copper alloy, low-temperature quick deformation treatment is carried out at a temperature lower than a temperature, at which the copper alloy slips and deforms; compared with a sample piece which is not subjected to low-temperature quick deformation treatment, not only is the strength of the copper alloy improved, but also the conductivity of the copper alloy is kept well. The copper alloy prepared in the invention has performances better than those of the copper alloy which is not prepared by the method in the invention, wherein the tensile strength is bigger than 600 MPa, the elongation is bigger than 10% and the conductivity is higher than 80% IACS (international annealed copper standard).

The invention discloses a machining process of high-strength and heat-resisting aluminum alloy wires. The process comprises performing solid dissolution on a high-strength and heat-resisting aluminum alloy bar at 480-540 DEG C for 1-10 h, performing rolling treatment on the solid-dissolved high-strength and heat-resisting aluminum alloy bar at a deformation degree of 31-83% into alloy rods with a diameter of 6-10 mm, and then performing aging treatment on the rolled alloy rods at 130-220 DEG C for 2-20 h; drawing the alloy rod in a drawing machine into the high-strength and heat-resisting aluminum alloy wires with a diameter of 2-5 mm; performing aging treatment and nondestructive detection. The aluminum alloy wires machined through the machining process of the high-strength and heat-resisting aluminum alloy wires achieve a tensile strength of 242 MPa, an electrical conductive rate of 53.04% IACS (international annealed copper standard) and strength remnant rates of 92.44% (180 DEG C*400 h) and 93.63% (230 DEG C*1 h), and obtain relatively good comprehensive performance of samples.