CN104131199A - Manufacturing method of 6101BT7 aluminum alloy thick-walled pipe conductors for electrical power equipment - Google Patents
Manufacturing method of 6101BT7 aluminum alloy thick-walled pipe conductors for electrical power equipment Download PDFInfo
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- CN104131199A CN104131199A CN201410393939.9A CN201410393939A CN104131199A CN 104131199 A CN104131199 A CN 104131199A CN 201410393939 A CN201410393939 A CN 201410393939A CN 104131199 A CN104131199 A CN 104131199A
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Abstract
The invention belongs to the technical field of aluminum alloy materials for electrical power equipment, particularly relates to a manufacturing method of high-strength and high-conductivity aluminum alloy thick-walled pipe conductors for high-voltage-resistant electrical power equipment for an inner hole to pass through a high-voltage wire, and in particular relates to a manufacturing method of 6101BT7 phi 146*11 mm (suitable for 6101BT7 pipes in various specifications) aluminum alloy thick-walled pipe conductors. A used aluminum alloy ingot comprises the following elements in percentage by mass: 0.40-0.55% of Si, 0.15-0.25% of Fe, less than or equal to 0.05% of Cu, less than or equal to 0.05% of Mn, 0.40-0.55% of Mg, less than or equal to 0.10% of Zn, less than or equal to 0.02% of Cr, less than or equal to 0.03% of single impurities, less than or equal to 0.10% of total impurities, and the balance of Al. According to the invention, problems such as mass production and delivery can be effectively solved, mechanical properties and electrical conductivities obtained by using the method are stable, and through repeated reproductive operations, all national standards can be satisfied.
Description
Technical field
The invention belongs to the technical field of aluminum alloy materials for power equipment, be specifically related to a kind of endoporus through high-voltage conducting wires with high pressure resistant power equipment the manufacture method with high strength and high conductivity rate thick-wall aluminum alloy pipe material conductor, be specially the applicable 6101BT7 all size tubing of 6101BT7 Ф 146 * 11mm() manufacture method of thick-wall aluminum alloy pipe material conductor.
Background technology
Fast development along with worldwide production technology, the new technology of power equipment and facilities protection application, novel material, novel process, product innovation emerges in an endless stream, electric wire to long-range conveying high-pressure electric power, the protection of cable makes power equipment increasing by the demand of high strength and high conductivity rate thick-wall aluminum alloy pipe material conductor, when high strength and high conductivity rate thick-wall aluminum alloy pipe material is applied in protection of electric power facility aspect, intensity must be possessed high, plasticity is good, specific tenacity is high, quality is light, high conductivity, high thermal conductivity, solidity to corrosion is good, the stress-free corrosion tendency of breaking, anti intercrystalline corrosion ability is strong, welding property is good, welding zone corrosion resisting property is constant, the advantages such as machinability is good, and there is good processing performance, be suitable for cutting, bending machining, being suitable for various forms of surface oxidation corrosionproof protections processes, at atmosphere soda acid, high and cold, high heat, moist, arid, in the environment such as dust storm, keep good use properties.
In view of the main strengthening element of 6101B aluminium alloy few, alloy is simple, so intensity is not high, but in high-temperature heating process, main strengthening element is along with temperature improves, solid solubility significantly increases, alloy has obvious quench aging strengthening effect, quenching a wider range, be suitable for press quenching, in alloy, Cu amount seldom, so add a small amount of Zn, to carry heavy alloyed strengthening effect, make the strength increase of 6101B alloy larger, but increase for the susceptibility of quenching, particularly pipe diameter is greater than 100mm, wall thickness is greater than 10mm, when the press quenching time is longer, corrosion resistance declines, manufacture method for 6101B thick-wall aluminum alloy pipe material conductor is not suitable for current method, therefore, be badly in need of a kind of 6101BT7 Ф 146 * 11mm(and be applicable to 6101BT7 all size tubing) manufacture method of thick-wall aluminum alloy pipe material conductor.
Summary of the invention
The object of the invention is for the manufacture method of a kind of power equipment of batch production with 6101BT7 thick-wall aluminum alloy pipe material conductor is provided, can effectively solve a large amount of production, delivery problems, the mechanical property obtaining by this method and stable conductivity, through repeatedly reproduction operation, all can meet national standard.
Technical scheme of the present invention is:
A manufacture method for 6101BT7 thick-wall aluminum alloy pipe material conductor for power equipment, step is as follows:
The aluminium alloy of a, casting is six line aluminium alloy circle ingot castings, in aluminium alloy cast ingot used, the mass percent Si of element is 0.40%～0.55%, Fe is that 0.15%～0.25%, Cu is that≤0.05%, Mn is≤0.05%, Mg is 0.40%～0.55%, Zn is≤0.10%, Cr≤0.02, single impurity≤0.03%, add up to impurity≤0.10%, all the other are Al;
B, by six line aluminium alloys circles ingot casting railway carriages, crop, back-end crop, get low power, chemical composition, cut woollen, woollen homogeneous, Heating temperature: 540-560 ℃, insulation is more than 9 hours, the type of cooling: air-cooled and water-cooled cooling;
C, the aluminium alloy woollen of preparation is heated to 500-530 ℃, packs rapidly container into, on 36MN or 55MN extrusion machine, carry out 500 ℃ of extrusion temperatures, extrusion speed 3 ± 0.5m/min, 500 ± 5 ℃ of press quenching temperature, quenching velocity 300-350 ℃/minute;
D, the 6101B thick-wall aluminum alloy pipe material conductor tension force stretching that c step is obtained, press quenching extensibility 1.5～1.7%, timeliness then, aging temp 160-230 ℃, metal heat preservation 8-14 hour, goes out aging oven;
E, the physics and chemistry testing material that timeliness is come out of the stove, the sample position of the standard for acceptance of regulation and drawing regulation, gets physics and chemistry sample as agreed, after whole physics and chemistry test detections are qualified, carries out packing after surface inspection, dimension inspection, passed examination.
In described a step, the specification of aluminium alloy round cast ingot is that Φ 320mm * 4000mm or specification are Φ 380mm * 4000mm.
In described b step, woollen specification is: Φ 308mm * 1200mm or specification are Φ 368mm * 1450mm.
In described b step, cooling employing air-cooled during to 200 ℃ water-cooled to room temperature.
In described c step, extrusion speed 3 ± 0.5m/min, 500 ± 5 ℃ of press quenching temperature, quenching velocity 300-350 ℃/minute.
In described d step, the extensibility 1.5～1.7% of press quenching.
In described d step, aging temp is 170-230 ℃, and metal heat preservation 8-14 hour, goes out aging oven.
The tensile strength 210-245MPa of the product obtaining, yield strength 155-189MPa, elongation 15-19%, Brinell hardness 70-79HB, specific conductivity 55.8-56.1%IACS.
Beneficial effect of the present invention is: in step a, chemical composition is within the scope of national standard, 6101B high strength and high conductivity rate thick-wall tube cast component scope is narrowed down, and casting range is controlled at center line the line on the upper side of national standard, avoid crossing great fluctuation process and causing that interior tissue is inhomogeneous and mechanical property scattered error is excessive due to chemical composition; Main strengthening Composition Control, at center line line and to control other alloying constituents the smaller the better on the upper side, is mainly in order to improve the purity of 6101B alloy, improves electric conductivity; In alloy, contain a certain amount of Fe element, Fe is combined and is had certain strengthening effect with aluminium, silicon, magnesium, superfluous iron rule forms hard crisp phase compound, falls low-alloyed plasticity, so add a certain amount of manganese, in and the detrimentally affect of iron, Cu content is less, so add a certain amount of Zn, is combined with main strengthening composition Si, Mg, mechanical property is significantly improved, Cu can in and the detrimentally affect of Ti to electric conductivity; Uncontrollability due to Fe element in castingprocesses, and Fe element is stipulated the main component of alloy for this reason, Fe participates in strengthening in 6101B, but unnecessary Fe forms hard embrittlement compound, institute so that Mn control of element reaching the standard grade, the detrimentally affect that can eliminate Fe again can crystal grain thinning, outside chemical composition standard range, add 0.02% Cr, Cr and Mn are more more remarkable than using separately the effect of one of them to 6101B Grain Refinement Effect, chemical composition according to mentioned above principle preparation, is stabilized in more than 90% the qualification rate of high strength and high conductivity rate tubing conductor.
In the equal fire preparing degree of step b, the type of cooling is that strong wind is cooled to 200 ℃ and adds water-cooled cooling, realize cooling fast, guarantee at utmost solid solution of strengthening element, reduce the operation waiting time more than 24 hours, enhance productivity, and high strength and high conductivity rate tubing conductive surface gloss after various oxidations or coating are processed is attractive in appearance, without dark line, concealed wire, not only guarantee use properties but also improve aesthetical perception; The extrusion speed of step c can guarantee temperature out, wear online water cooling and guarantee quenching effect, guarantee that mechanical property and specific conductivity adjust to optimum regime, press quenching and off-line quench and relatively can reduce distortion, steps d makes extensibility between 1.5～1.7%, reduce extensibility and change the size inequality causing greatly, guarantee that in lasting supply of material process, size scattered error is little, press quenching and off-line quench relatively can reduce take the lead, hanging, off-line quench heat up, insulation equal time, every batch is reduced activity time more than 10 hours.
By above measure, can realize 6101BT7 high strength and high conductivity rate tubing conductor press quenching and meet the requirement of high strength and high conductivity rate, tensile strength 210-245MPa, yield strength 155-189MPa, elongation 15-19%, Brinell hardness 70-79HB, specific conductivity 55.8-56.1%IACS; National standard requires: tensile strength >=170MPa, yield strength >=120MPa, elongation >=12%, Brinell hardness >=56HB, specific conductivity >=55.17%IACS.
In a word, the product that the present invention obtains, possess that intensity is high, plasticity good, specific tenacity is high, quality is light, high conductivity, high thermal conductivity, solidity to corrosion are good, stress-free corrosion breaks tendency, anti intercrystalline corrosion ability is strong, welding property good, welding zone corrosion resisting property is constant, machinability good, be easy to the advantages such as processing, and there is good processing performance, be suitable for machining and various forms of machine-shaping.According to technique scheme, produce reproduction, the high strength and high conductivity rate tubing conductor that user uses our company to provide, be applied in various environment, through use in a few years, there are not any quality problems, the more important thing is and the invention provides the manufacture method of high strength and high conductivity rate thick-wall aluminum alloy pipe material conductor for batch production power equipment, make production efficiency improve 10～21%.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1,
A. the aluminium alloy of casting is six line aluminium alloy circle ingot castings, in aluminium alloy cast ingot used, the mass percent Si of element is 0.52%, Fe is that 0.24%, Cu is that 0.042%, Mn is 0.044%, Mg is 0.54%, Zn is≤0.093%, Cr≤0.018, single impurity≤0.03%, add up to impurity≤0.10%, all the other are Al;
Specification is Φ 320mm * 4000mm, and during melting six line aluminium alloys circles ingot casting, charge calculation be take the center line of step a as basis, to guarantee that ingot casting Composition Control is in standard range; After thawing, once skim, once skim after smelting furnace refining, once skim after holding furnace refining; A degasification after a degasification, holding furnace refining after smelting furnace refining, carries out a getter degasification again after holding furnace refining.
B, specification is Φ 320mm * 4000mm six line aluminium alloys circles ingot casting railway carriages, crop, back-end crop, gets low power, chemical composition, cut woollen, woollen specification is Φ 308mm * 1200mm; Woollen homogeneous, Heating temperature: 550 ℃, be incubated 10 hours, the type of cooling: air-cooled+water-cooled cooling.
C, by preparation No. six aluminium alloy round cast ingot woollens be heated to 500-530 ℃, pack rapidly container into, extrusion speed 3 ± 0.5m/min, 500 ℃ of quenching temperatures, 300～350 ℃/minute of quenching velocity.
D, by high strength and high conductivity rate thick-wall aluminum alloy pipe material tension force stretching for power equipment, extensibility 1.5～1.7%, then timeliness: aging temp 170-230 ℃, metal heat preservation 8-14 hour, goes out aging oven.
E, the physics and chemistry testing material that timeliness is come out of the stove, the sample position that the standard for acceptance of regulation and drawing are stipulated as agreed, get physics and chemistry sample, after whole physics and chemistry test detections are qualified, the power equipment of high strength and high conductivity rate thick-wall aluminum alloy pipe material surface inspection, dimension inspection, passed examination for power equipment is packed with high strength and high conductivity rate thick-wall aluminum alloy pipe material.
Embodiment 2:
Present embodiment as different from Example 1, No. six aluminium alloy round cast ingot specifications that adopt in step a are Φ 380mm * 4000mm, use the ingot casting of larger diameter can improve crimp, improve intensity, refining degree reaches the requirement of stair oxidation film, there is no metallic compound segregation, and in chemical composition, Mg:Si is not the conventional ratio according to 1.73:1, but Si is superfluous, other steps and parameter are identical with embodiment 1.
Embodiment 3:
Present embodiment as different from Example 1, woollen homogeneous, Heating temperature: 560 ℃, insulation is more than 9 hours, the type of cooling: air-cooled water-cooled is to room temperature during to 200 ℃, and low power checks oxide film, checks compound segregation, meet the requirement of stair oxidation film, other steps and parameter are identical with embodiment 1.
Embodiment 4:
As different from Example 1,530 ℃ of Heating temperatures, pack rapidly container into present embodiment, and extrusion speed 3.5m/min guarantees 520 ℃ of tubing temperature outs, 330～350 ℃/minute of quenching velocity, and other steps and parameter are identical with embodiment 1.
Embodiment 5:
Present embodiment as different from Example 1, by high strength and high conductivity rate thick-wall aluminum alloy pipe material tension force stretching for certain type power equipment, extensibility 1.7%, then timeliness, 195 ℃ of aging temps, metal heat preservation 14 hours, go out aging oven, other steps and parameter are identical with embodiment 1.
Embodiment 6:
As different from Example 1, low power checks oxide film and compound segregation to present embodiment, and other steps and parameter are identical with embodiment 1.
High strength and high conductivity rate thick-wall aluminum alloy pipe material manufacture method for batch production power equipment provided by the invention, can make production efficiency improve 10～21%.
Claims (8)
1. a manufacture method for 6101BT7 thick-wall aluminum alloy pipe material conductor for power equipment, step is as follows:
The aluminium alloy of a, casting is six line aluminium alloy circle ingot castings, in aluminium alloy cast ingot used, the mass percent Si of element is 0.40%～0.55%, Fe is that 0.15%～0.25%, Cu is that≤0.05%, Mn is≤0.05%, Mg is 0.40%～0.55%, Zn is≤0.10%, Cr≤0.02, single impurity≤0.03%, add up to impurity≤0.10%, all the other are Al;
B, by six line aluminium alloys circles ingot casting railway carriages, crop, back-end crop, get low power, chemical composition, cut woollen, woollen homogeneous, Heating temperature: 540-560 ℃, insulation is more than 9 hours, the type of cooling: air-cooled and water-cooled cooling;
C, the aluminium alloy woollen of preparation is heated to 500-530 ℃, packs rapidly container into, on 36MN or 55MN extrusion machine, carry out 500 ℃ of extrusion temperatures, extrusion speed 3 ± 0.5m/min, 500 ± 5 ℃ of press quenching temperature, quenching velocity 300-350 ℃/minute;
D, the 6101B thick-wall aluminum alloy pipe material conductor tension force stretching that c step is obtained, press quenching extensibility 1.0～2.0%, timeliness then, aging temp 160-230 ℃, metal heat preservation 8-14 hour, goes out aging oven;
E, the physics and chemistry testing material that timeliness is come out of the stove, the sample position of the standard for acceptance of regulation and drawing regulation, gets physics and chemistry sample as agreed, after whole physics and chemistry test detections are qualified, carries out packing after surface inspection, dimension inspection, passed examination.
2. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, is characterized in that, in described a step, the specification of aluminium alloy round cast ingot is that Φ 320mm * 4000mm or specification are Φ 380mm * 4000mm.
3. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, is characterized in that, in described b step, woollen specification is: Φ 308mm * 1200mm or specification are Φ 368mm * 1450mm.
4. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, is characterized in that, in described b step, after woollen homogeneous cooling employing air-cooled during to 200 ℃ water-cooled to room temperature.
5. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, is characterized in that, in described d step, aging temp is 170-230 ℃, and metal heat preservation 8-14 hour, goes out aging oven.
6. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, it is characterized in that, in described c step, extrusion speed 3 ± 0.5m/min, 500 ± 5 ℃ of press quenching temperature, quenching velocity 300-350 ℃/minute.
7. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, is characterized in that, in described d step, and the extensibility 1.0～2.0% of press quenching.
8. the manufacture method of 6101B T7 thick-wall aluminum alloy pipe material conductor for a kind of power equipment according to claim 1, it is characterized in that, the tensile strength 210-245MPa of the product obtaining, yield strength 155-189MPa, elongation 15-19%, Brinell hardness 70-79HB, specific conductivity 55.8-56.1%IACS.
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Cited By (5)
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| CN105603268A (en) * | 2016-01-11 | 2016-05-25 | 湖北莲花电力母线制造有限公司 | Manufacturing method of high-strength and high-conductivity aluminum-magnesium-silicon alloy contact tube bus |
| CN105648284A (en) * | 2016-01-21 | 2016-06-08 | 山东创新金属科技股份有限公司 | High-conductivity alloy material replacing copper with aluminum |
| CN108866363A (en) * | 2018-07-25 | 2018-11-23 | 辽宁忠旺集团有限公司 | A kind of 6082 aluminum alloy thick wall tubing production technologies |
| CN112342414A (en) * | 2020-11-06 | 2021-02-09 | 辽宁忠旺集团有限公司 | 6101B aluminium alloy casting production process |
| CN115896564A (en) * | 2022-12-30 | 2023-04-04 | 精美铝业有限公司 | Special aluminum alloy plate for new energy automobile charging device and preparation method thereof |
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| CN115896564A (en) * | 2022-12-30 | 2023-04-04 | 精美铝业有限公司 | Special aluminum alloy plate for new energy automobile charging device and preparation method thereof |
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| CN104131199B (en) | 2016-08-31 |
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Denomination of invention: A manufacturing method of 6101bt7 aluminum alloy thick wall pipe conductor for power equipment Effective date of registration: 20220309 Granted publication date: 20160831 Pledgee: China Xinda Asset Management Co.,Ltd. Shandong Branch Pledgor: SHANDONG YUHANG SPECIAL ALLOY EQUIPMENT CO.,LTD. Registration number: Y2022980002321 |
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