CN102744256A - Continuous casting and rolling production method for high-conductivity aluminium rod - Google Patents
Continuous casting and rolling production method for high-conductivity aluminium rod Download PDFInfo
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- CN102744256A CN102744256A CN2012102091082A CN201210209108A CN102744256A CN 102744256 A CN102744256 A CN 102744256A CN 2012102091082 A CN2012102091082 A CN 2012102091082A CN 201210209108 A CN201210209108 A CN 201210209108A CN 102744256 A CN102744256 A CN 102744256A
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Abstract
The invention discloses a continuous casting and rolling production method for a high-conductivity aluminium rod. The production method comprises the following steps of: melting pure aluminium ingot, performing heat preservation and precipitation on an aluminium-boron alloy, refining and degassing, using a large ladle, using a small ladle, casting, using a continuous rolling machine, and obtaining the rod. The production method disclosed by the invention is simple, and convenient in operation; the produced aluminium rod is few in impurity, high in conductivity, and high in tensile strength; and by utilizing an electrical aluminium wire produced by the high-conductivity aluminium rod, unnecessary energy consumption can be reduced during a power transmission process.
Description
Technical field
The present invention relates to a kind of continuous casting and tandem rolling production method of high conductivity aluminium bar, belong to the aluminum conductor production technical field.
Background technology
Jumbo defeated, distribution line, the newly-built big capacity overhead transmission line or the capacity-increasing transformation of old circuit all need a large amount of aluminum conductors.Aluminum conductor is prepared from the aluminium bar, and in this process, the resistivity that reduces aluminium is the target that people pursue to improve its electric conductivity always, so the performance of aluminium bar especially electric conductivity directly has influence on the electric conductivity of aluminum conductor.General aluminium bar production method is: fine aluminium ingot → fusing → big casting ladle → little casting ladle → casting → tandem mill → one-tenth bar.The aluminium bar impurity that this production method is produced is more, conductance is lower and tensile strength is low, can not guarantee the electric conductivity of aluminum conductor.
Summary of the invention
The impurity of the aluminium bar of producing to existing aluminium bar production method is more, conductance is low and tensile strength is low; The aluminum conductor of preparation is easy to break; The continuous casting and tandem rolling production method that the purpose of this invention is to provide a kind of high conductivity aluminium bar, the aluminium bar that this production method is produced, not only impurity is few, conductance is high; And tensile strength is big, and the aluminum conductor of producing with this high conductivity aluminium bar can reduce unnecessary energy consumption in the transmission of electricity process.
Technical solution of the present invention is: this production method may further comprise the steps: fine aluminium ingot, fusing, aluminum-boron alloy, insulation deposition, refining degasification, big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar, and concrete steps are: fusing fine aluminium ingot in the holding furnace; The adjustment temperature keeps 700-750 ℃, adds aluminum-boron alloy, makes aluminium liquid boracic quality 0.02%-0.06%; Stirred 5 minutes, temperature keeps 700-750 ℃ and left standstill 30-40 minutes; The aluminium melt purifying of post precipitation, nitrogen feeding pressure is 0.4-0.6kg/cm in the purification tank
2, nitrogen use level 2.2-3Nm
3/ h, temperature are 700-750 ℃, purify after 1.7 * 1.7 millimeters hole glass crosses filtrations in the lautertuns; Filter the back aluminum melt through big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar; Wherein, 710 ± 10 ℃ of cast temperatures, strand speed 2.5-3.0m/min advances to roll 480-500 ℃ of temperature, 250-300 ℃ of closing quotation temperature, self annealing was carried out in the insulation of closing quotation back in 3 hours.
Wherein, boron mass content >=3.5% in the aluminum-boron alloy.
Advantage of the present invention is: 1, production method is simple, and is easy to operate, is convenient to promote; 2, in aluminium liquid, add aluminum-boron alloy; Boron element can reduce the influence of trace elements such as titanium in the aluminium, vanadium, manganese, chromium to conductance; Thereby improve the electric conductivity of aluminium conductor, conductance increases to more than the 63%IACS, and intensity and percentage elongation also keep the level of aluminium commonly used; The aluminum conductor current-carrying capacity of producing with this aluminium bar is high, in the transmission of electricity process, can reduce unnecessary energy consumption.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment, these embodiment can not be interpreted as it is the restriction to technical scheme.
Embodiment 1: produce the aluminium bar according to following steps
Fusing fine aluminium ingot in the holding furnace; The aluminium ingot trade mark is AL99.70; Wherein 0.020%-0.025% B, Si≤0.10%, Fe≤0.20%, Cu≤0.01%, Ga≤0.03%, Mg≤0.02%, Zn≤0.03%, impurity≤0.03%, all the other are aluminium, constituent content is mass fraction; The adjustment temperature keeps 700 ℃, adds boron mass content>=3.5% aluminum-boron alloy, makes aluminium liquid boracic quality 0.02%; Stirred 5 minutes, temperature keeps 700 ℃ and left standstill 40 minutes; The aluminium melt purifying of post precipitation, nitrogen feeding pressure is 0.4kg/cm in the purification tank
2, nitrogen use level 3Nm
3/ h, temperature are 700 ℃, purify after 1.7 * 1.7 millimeters hole glass crosses filtrations in the lautertuns; Filter the back aluminum melt through big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar; Wherein, 700 ℃ of cast temperatures, strand speed 2.5m/min advances to roll 480 ℃ of temperature, 250 ℃ of closing quotation temperature, self annealing was carried out in the insulation of closing quotation back in 3 hours.
Embodiment 2: produce the aluminium bar according to following steps
Fusing fine aluminium ingot in the holding furnace; The aluminium ingot trade mark is AL99.70; Wherein 0.020%-0.025% B, Si≤0.10%, Fe≤0.20%, Cu≤0.01%, Ga≤0.03%, Mg≤0.02%, Zn≤0.03%, impurity≤0.03%, all the other are aluminium, constituent content is mass fraction; The adjustment temperature keeps 725 ℃, adds boron mass content>=3.5% aluminum-boron alloy, makes aluminium liquid boracic quality 0.04%; Stirred 5 minutes, temperature keeps 725 ℃ and left standstill 35 minutes; The aluminium melt purifying of post precipitation, nitrogen feeding pressure is 0.5kg/cm in the purification tank
2, nitrogen use level 2.6Nm
3/ h, temperature are 725 ℃, purify after 1.7 * 1.7 millimeters hole glass crosses filtrations in the lautertuns; Filter the back aluminum melt through big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar; Wherein, 710 ℃ of cast temperatures, strand speed 2.8m/min advances to roll 490 ℃ of temperature, 280 ℃ of closing quotation temperature, self annealing was carried out in the insulation of closing quotation back in 3 hours.
Embodiment 3: produce the aluminium bar according to following steps
Fusing fine aluminium ingot in the holding furnace; The aluminium ingot trade mark is AL99.70; Wherein 0.020%-0.025% B, Si≤0.10%, Fe≤0.20%, Cu≤0.01%, Ga≤0.03%, Mg≤0.02%, Zn≤0.03%, impurity≤0.03%, all the other are aluminium, constituent content is mass fraction; The adjustment temperature keeps 750 ℃, adds boron mass content>=3.5% aluminum-boron alloy, makes aluminium liquid boracic quality 0.06%; Stirred 5 minutes, temperature keeps 750 ℃ and left standstill 30 minutes; The aluminium melt purifying of post precipitation, nitrogen feeding pressure is 0.6kg/cm in the purification tank
2, nitrogen use level 2.2Nm
3/ h, temperature are 750 ℃, purify after 1.7 * 1.7 millimeters hole glass crosses filtrations in the lautertuns; Filter the back aluminum melt through big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar; Wherein, 720 ℃ of cast temperatures, strand speed 3.0m/min advances to roll 500 ℃ of temperature, 300 ℃ of closing quotation temperature, self annealing was carried out in the insulation of closing quotation back in 3 hours.
Aluminium bar measured data such as the following table of embodiment 1-3:
| Sequence number | Tensile strength Mpa | Percentage elongation % | Conductance IACS | Resistivity Ω m |
| 1 | 110 | 22 | 63.2 | 2.71×10 -8 |
| 2 | 105 | 20 | 63.4 | 2.72×10 -8 |
| 3 | 98 | 19 | 63.6 | 2.73×10 -8 |
Claims (2)
1. the continuous casting and tandem rolling production method of high conductivity aluminium bar; It is characterized in that this production method may further comprise the steps: fine aluminium ingot, fusing, aluminum-boron alloy, insulation deposition, refining degasification, big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar, concrete steps are: fusing fine aluminium ingot in the holding furnace; The adjustment temperature keeps 700-750 ℃, adds aluminum-boron alloy, makes aluminium liquid boracic quality 0.02%-0.06%; Stirred 5 minutes, temperature keeps 700-750 ℃ and left standstill 30-40 minutes; The aluminium melt purifying of post precipitation, nitrogen feeding pressure is 0.4-0.6kg/cm in the purification tank
2, nitrogen use level 2.2-3Nm
3/ h, temperature are 700-750 ℃, purify after 1.7 * 1.7 millimeters hole glass crosses filtrations in the lautertuns; Filter the back aluminum melt through big casting ladle, little casting ladle, casting, tandem mill, one-tenth bar; Wherein, 710 ± 10 ℃ of cast temperatures, strand speed 2.5-3.0m/min advances to roll 480-500 ℃ of temperature, 250-300 ℃ of closing quotation temperature, self annealing was carried out in the insulation of closing quotation back in 3 hours.
2. the continuous casting and tandem rolling production method of high conductivity aluminium bar according to claim 1 is characterized in that: wherein, and boron mass content >=3.5% in the aluminum-boron alloy.
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| CN2012102091082A CN102744256A (en) | 2012-06-25 | 2012-06-25 | Continuous casting and rolling production method for high-conductivity aluminium rod |
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| CN2012102091082A CN102744256A (en) | 2012-06-25 | 2012-06-25 | Continuous casting and rolling production method for high-conductivity aluminium rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143582A (en) * | 2013-03-21 | 2013-06-12 | 北京科技大学 | High-conductivity aluminum alloy plate extrusion forming device and technology |
| CN109234580A (en) * | 2018-08-03 | 2019-01-18 | 特变电工山东鲁能泰山电缆有限公司 | A kind of high-strength conductive rate aluminium bar material and production method |
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| US5593515A (en) * | 1994-03-29 | 1997-01-14 | Tsuyoshi Masumoto | High strength aluminum-based alloy |
| CN1271024A (en) * | 1999-04-15 | 2000-10-25 | 大连理工大学 | Preparation of boronic aluminium alloy with high conductivity |
| CN1485455A (en) * | 2002-09-25 | 2004-03-31 | 上海电缆研究所 | Method for manufacturing non-heat treatment type aluminum alloy wire of high conductivity and heat resistance |
| WO2006041989A2 (en) * | 2004-10-05 | 2006-04-20 | Tosoh Smd, Inc. | Sputtering target and method of its fabrication |
| JP2006253109A (en) * | 2005-02-08 | 2006-09-21 | Furukawa Electric Co Ltd:The | Aluminum conductive wire |
| CN101961737A (en) * | 2010-10-08 | 2011-02-02 | 黄洋铜业有限公司 | Continuous casting and rolling production method of aluminum rod |
| CN102127666A (en) * | 2011-03-03 | 2011-07-20 | 安徽省惠尔电气有限公司 | Rare earth aluminum alloy conductor and preparation method thereof |
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- 2012-06-25 CN CN2012102091082A patent/CN102744256A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5593515A (en) * | 1994-03-29 | 1997-01-14 | Tsuyoshi Masumoto | High strength aluminum-based alloy |
| CN1271024A (en) * | 1999-04-15 | 2000-10-25 | 大连理工大学 | Preparation of boronic aluminium alloy with high conductivity |
| CN1485455A (en) * | 2002-09-25 | 2004-03-31 | 上海电缆研究所 | Method for manufacturing non-heat treatment type aluminum alloy wire of high conductivity and heat resistance |
| WO2006041989A2 (en) * | 2004-10-05 | 2006-04-20 | Tosoh Smd, Inc. | Sputtering target and method of its fabrication |
| JP2006253109A (en) * | 2005-02-08 | 2006-09-21 | Furukawa Electric Co Ltd:The | Aluminum conductive wire |
| CN101961737A (en) * | 2010-10-08 | 2011-02-02 | 黄洋铜业有限公司 | Continuous casting and rolling production method of aluminum rod |
| CN102127666A (en) * | 2011-03-03 | 2011-07-20 | 安徽省惠尔电气有限公司 | Rare earth aluminum alloy conductor and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143582A (en) * | 2013-03-21 | 2013-06-12 | 北京科技大学 | High-conductivity aluminum alloy plate extrusion forming device and technology |
| CN103143582B (en) * | 2013-03-21 | 2015-09-16 | 北京科技大学 | A kind of aluminium alloy plate extrusion molding apparatus of high conductivity and technique |
| CN109234580A (en) * | 2018-08-03 | 2019-01-18 | 特变电工山东鲁能泰山电缆有限公司 | A kind of high-strength conductive rate aluminium bar material and production method |
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