CN104805335A - Low-resistivity aluminum alloy rod - Google Patents

Low-resistivity aluminum alloy rod Download PDF

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Publication number
CN104805335A
CN104805335A CN201510241012.8A CN201510241012A CN104805335A CN 104805335 A CN104805335 A CN 104805335A CN 201510241012 A CN201510241012 A CN 201510241012A CN 104805335 A CN104805335 A CN 104805335A
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low
resistivity
aluminum alloy
alloy rod
aluminium
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CN201510241012.8A
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CN104805335B (en
Inventor
宋爱成
蔺亚强
张军
肖凤
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Jiangsu Hengtong Wire and Cable Technology Co Ltd
Jiangsu Hengtong Electric Power Special Wire Co Ltd
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Jiangsu Hengtong Electric Power Special Wire Co Ltd
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Priority to CN201710083841.7A priority Critical patent/CN107058810B/en
Priority to CN201710264334.3A priority patent/CN107254607A/en
Priority to CN201710083773.4A priority patent/CN106939384B/en
Priority to CN201710083834.7A priority patent/CN107201465B/en
Priority to CN201510241012.8A priority patent/CN104805335B/en
Publication of CN104805335A publication Critical patent/CN104805335A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Conductive Materials (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Abstract

The invention discloses a low-resistivity aluminum alloy rod. The low-resistivity aluminum alloy rod consisting the following components in parts by weight: 100 parts of aluminum, 0.04 to 0.06 part of silicon, 1 to 1.3 parts of iron, 0.18 to 0.28 part of copper, 0.08 to 0.1 part of rare earth elements, 0.015 to 0.03 part of boron and 0.01 to 0.02 part of titanium; the rare earth elements consist of lanthanum, cerium and scandium. The low-resistivity aluminum alloy rod is manufactured through the following steps: mixing the lanthanum, the cerium and the scandium according to a weight ratio of 14: 6: 1 to form the rare earth elements; putting all the components into a smelting furnace, heating to smelt the components, carrying out heat preservation at 750 to 780 DEG C, sufficiently stirring over 30 minutes to be uniform, standing and carrying out heat preservation to obtain an alloy melt; casting to obtain an aluminum alloy cast ingot through an aluminum alloy melt, wherein the casting temperature is controlled at 690 to 700 DEG C; carrying out inductive heating, raising the temperature to 520 to 540 DEG C and then rolling, wherein the temperature is raised prior to rolling. A metallic structure of the low-resistivity aluminum alloy rod is better clearly; after production testing and follow-up wiredrawing, the tensile strength and the elongation rate of the low-resistivity aluminum alloy rod are remarkably improved and the resistivity is reduced by 6 to 10 percent.

Description

Low-resistivity aluminium alloy rod
Technical field
The present invention relates to a kind of aluminium alloy rod, particularly relate to a kind of low-resistivity aluminium alloy rod.
Background technology
Aluminium alloy is one of most popular nonferrous materials in industry, existing extensive application in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry.Along with fast development that is scientific and technical and industrial economy, the demand of aluminium alloy is increasing, and the research of aluminium alloy also thereupon deeply.The widespread use of aluminium alloy facilitates the development of aluminium alloy in power industry, and the development of power industry simultaneously has the Application Areas facilitating aluminium alloy.
The aluminium alloy rod that aluminium alloy circuit uses, conventional aluminium alloy rod wants wire drawing to 0.10-0.12mm.And at present, inside mechanical processing industry cable field, traditional aluminium bar or aluminium alloy rod after fabrication, due to the restriction of organization material structure, affect material and add the performance in man-hour, its tensile strength and elongation are all on the low side, and tensile strength only has 180Mpa, and elongation only has 10%, in follow-up drawing process, cause early stage fracture of wire or intensity defective, so not only cause raw-material waste, and add production cost.
Summary of the invention
The invention provides a kind of low-resistivity aluminium alloy rod, this low-resistivity aluminium alloy rod metallization structure is clearly better, and greatly improves through production test and follow-up wire drawing tensile strength, elongation, reduces resistivity 6 ~ 10%.
For achieving the above object, the technical solution used in the present invention is: a kind of low-resistivity aluminium alloy rod, and described low-resistivity aluminium alloy rod is made up of the component of following weight part:
100 parts, aluminium,
Silicon 0.04 ~ 0.06 part,
Iron 1 ~ 1.3 part,
Copper 0.18 ~ 0.28 part,
0.08 ~ 0.1 part, rare earth element,
Boron 0.015 ~ 0.03 part,
Titanium 0.01 ~ 0.02 part;
Described rare earth element is made up of lanthanum, cerium and scandium, and described lanthanum, cerium and scandium are mixed to form described rare earth element according to 14:6:1 weight ratio.
The technical scheme improved further in technique scheme is as follows:
1., in such scheme, the model of described aluminium is Al99.70 or Al99.85.
2., in such scheme, described low-resistivity aluminium alloy rod is obtained by following technique, and this technique comprises the following steps:
Step one, by aluminium ingot 100 parts of input smelting furnaces, heating makes it fusing and is incubated at 750-780 DEG C, add silicon 0.04 ~ 0.06 part, iron 1 ~ 1.3 part, copper 0.18 ~ 0.28 part, 0.08 ~ 0.1 part, rare earth element, boron 0.005 ~ 0.03 part and titanium 0.001 ~ 0.02 part, be stirred well to evenly, churning time >=30min, leave standstill insulation, obtain alloy melt;
Step 2, add refining agent in step one alloy melt, and adopt high pure nitrogen to carry out refining, nitrogen refining temperature 750 ~ 780 DEG C, then insulation obtains aluminum alloy melt;
Step 3, the aluminum alloy melt of step 2 toppled over and comes out of the stove, then carry out degasification through online gas-freeing system, in order to control obnoxious flavour in aluminium liquid;
Step 4, the aluminum alloy melt of casting through step 3 obtain aluminium alloy cast ingot, and casting cycle controls pouring temperature 690 ~ 700 DEG C, control casting rate 5t/h;
Step 5, carry out induction heating, temperature is rolled at being raised to 520 ~ 540 DEG C, carries out the lifting of temperature before entering to roll, temperature is improved 30 ~ 40 DEG C namely original temperature be 490-510, after temperature improves 30-40 DEG C, temperature becomes 520-540 DEG C, then enters to roll at 520-540 DEG C;
Step 6, cool rapidly, cooling segment always has 5 parts and cools, and by regulating each areal distribution, aluminium bar is cooled to 60 ~ 90 DEG C, each areal distribution is as shown in table 3:
Table 3 water coolant distribution table
Region 1st district 2nd district 3rd district 4th district 5th district
Hydraulic pressure/Mpa 100 200 100 50 0
Step 7, take-up, take-up mode can adopt solid matter winding method to carry out take-up.
3., in such scheme, the time leaving standstill insulation in described step one is 45min, and in described step 2, refining time is 45min.
Because technique scheme is used, the present invention compared with prior art has following advantages:
Low-resistivity aluminium alloy rod of the present invention, synergy containing the rare earth element iron and the rare earth in stated limit that are made up of lanthanum, cerium and scandium in its formula, the ductility of rod of metal alloy can be improved, optimize aluminium liquid component, crystal grain thinning, remove slag, increase corrosion resistance nature, remove the gas in aluminium alloy and detrimental impurity, reduce the formation of crack of aluminium alloy, thus improve the intensity of aluminium alloy, improve processing characteristics, the thermotolerance of aluminium alloy, plasticity-and forging property can also be improved, improve hardness, gain in strength and toughness; Secondly, described lanthanum, cerium and scandium are mixed to form described rare earth element according to 14:6:1 weight ratio and boron acts synergistically, make product in casting cycle, improve the mobility of aluminium, reduce the disadvantageous effect of other elements in aluminium, form nuclear particle, thus form non-spontaneous forming core, play the effect of crystal grain thinning, macrograin degree can reach 5-6 level.Within the specific limits, and above-mentioned aluminium can be reasonably combined, reduces resistivity 6 ~ 10% for the boron added; Again, titanium elements: after there is above-mentioned beneficial element in aluminum substrate, then add titanium elements, can play a significant role in metal grain tissue, and controlled within the scope of the invention by titanium elements, macrograin degree reaches 6-8 level.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1 ~ 3: a kind of low-resistivity aluminium alloy rod, described low-resistivity aluminium alloy rod is made up of the component of following weight part:
Described low-resistivity aluminium alloy rod is made up of the component of following weight part:
Table 1
Described rare earth element is made up of lanthanum, cerium and scandium, and described lanthanum, cerium and scandium are mixed to form described rare earth element according to 14:6:1 weight ratio.
The manufacturing process of above-mentioned low-resistivity aluminium alloy rod is as follows:
Step one, by aluminium ingot 100 parts of input smelting furnaces, heating makes it fusing and is incubated at 750-780 DEG C, add silicon 0.04 ~ 0.06 part, iron 1 ~ 1.3 part, copper 0.18 ~ 0.28 part, 0.08 ~ 0.1 part, rare earth element, boron 0.015 ~ 0.03 part and titanium 0.01 ~ 0.02 part, be stirred well to evenly, churning time >=30min, leaves standstill insulation 45min;
Step 2, add refining agent in step one alloy melt, and adopt high pure nitrogen to carry out refining, nitrogen refining temperature 750-780 DEG C, refining time 45min, then be incubated;
Step 3, to be toppled over by the aluminium liquid of step 2 and come out of the stove, then carry out degasification through online gas-freeing system, in order to control obnoxious flavour in aluminium liquid, adopt gas-freeing system to process, and adopt hydrogen meter to detect, index request is as following table:
Table 2 degasification requirement
Step 4, casting obtain aluminium alloy cast ingot, casting, and casting cycle controls pouring temperature 690 ~ 700 DEG C, control casting rate 5t/h.
Step 5, carry out induction heating, temperature is rolled at being raised to 520-540 DEG C.In order to control the indices of aluminium alloy rod well, rolling must be carried out at a certain temperature, lifting and the original temperature that can carry out temperature before entering to roll are 490-510, after temperature improves 30-40 DEG C, temperature becomes 520-540 DEG C, adopts heating unit, temperature can be improved 30-40 DEG C, only enter to roll at 520-540 DEG C, could with the combination of this composition, make aluminium alloy rod reach requirement.
Step 6, cool rapidly, cooling segment always has 5 parts and cools, and by regulating each areal distribution, aluminium bar is cooled to 60 ~ 90 DEG C, each areal distribution is as follows:
Table 3 water coolant distribution table
Region 1st district 2nd district 3rd district 4th district 5th district
Hydraulic pressure/Mpa 100 200 100 50 0
Step its, take-up, take-up mode can adopt solid matter winding method to carry out take-up.
When adopting above-mentioned low-resistivity aluminium alloy rod, synergy containing the rare earth element iron and the rare earth in stated limit that are made up of lanthanum, cerium and scandium in its formula, the ductility of rod of metal alloy can be improved, optimize aluminium liquid component, crystal grain thinning, remove slag, increase corrosion resistance nature.Remove the gas in aluminium alloy and detrimental impurity, reduce the formation of crack of aluminium alloy, thus improve the intensity of aluminium alloy, improve processing characteristics, the thermotolerance of aluminium alloy, plasticity-and forging property can also be improved, improve hardness, gain in strength and toughness; Secondly, described lanthanum, cerium and scandium are mixed to form described rare earth element according to 14:6:1 weight ratio and boron acts synergistically, make product in casting cycle, improve the mobility of aluminium, reduce the disadvantageous effect of other elements in aluminium, form nuclear particle, thus form non-spontaneous forming core, play the effect of crystal grain thinning, macrograin degree can reach 5 ~ 6 grades.Within the specific limits, and above-mentioned aluminium can be reasonably combined, reduces resistivity 6 ~ 10% for the boron added; Again, titanium elements: after there is above-mentioned beneficial element in aluminum substrate, then add titanium elements, can play a significant role in metal grain tissue, and controlled within the scope of the invention by titanium elements, macrograin degree reaches 6 ~ 8 grades.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to spirit of the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (4)

1. a low-resistivity aluminium alloy rod, is characterized in that: described low-resistivity aluminium alloy rod is made up of the component of following weight part:
100 parts, aluminium,
Silicon 0.04 ~ 0.06 part,
Iron 1 ~ 1.3 part,
Copper 0.18 ~ 0.28 part,
0.08 ~ 0.1 part, rare earth element,
Boron 0.015 ~ 0.03 part,
Titanium 0.01 ~ 0.02 part;
Described rare earth element is made up of lanthanum, cerium and scandium, and described lanthanum, cerium and scandium are mixed to form described rare earth element according to 14:6:1 weight ratio.
2. low-resistivity aluminium alloy rod according to claim 1, is characterized in that: the model of described aluminium is Al99.70 or Al99.85.
3. low-resistivity aluminium alloy rod according to claim 1 and 2, is characterized in that: described low-resistivity aluminium alloy rod is obtained by following technique, and this technique comprises the following steps:
Step one, by aluminium ingot 100 parts of input smelting furnaces, heating makes it fusing and is incubated at 750-780 DEG C, add silicon 0.04 ~ 0.06 part, iron 1 ~ 1.3 part, copper 0.18 ~ 0.28 part, 0.08 ~ 0.1 part, rare earth element, boron 0.005 ~ 0.03 part and titanium 0.001 ~ 0.02 part, be stirred well to evenly, churning time >=30min, leave standstill insulation, obtain alloy melt;
Step 2, add refining agent in step one alloy melt, and adopt high pure nitrogen to carry out refining, nitrogen refining temperature 750 ~ 780 DEG C, then insulation obtains aluminum alloy melt;
Step 3, the aluminum alloy melt of step 2 toppled over and comes out of the stove, then carry out degasification through online gas-freeing system, in order to control obnoxious flavour in aluminium liquid;
Step 4, the aluminum alloy melt of casting through step 3 obtain aluminium alloy cast ingot, and casting cycle controls pouring temperature 690 ~ 700 DEG C, control casting rate 5t/h, confirm crystalline state through metallurgical analysis;
Step 5, carry out induction heating, before entering to roll, carry out the lifting of temperature, temperature is improved 30 ~ 40 DEG C, realizes temperature and change 520 ~ 540 DEG C into by 490-510 DEG C, then enter to roll at 520-540 DEG C;
Step 6, cool rapidly, cooling segment always has 5 parts and cools, and by regulating each areal distribution, aluminium bar is cooled to 60 ~ 90 DEG C, each areal distribution is as shown in table 3:
Table 3 water coolant distribution table
Region 1st district 2nd district 3rd district 4th district 5th district Hydraulic pressure/Mpa 100 200 100 50 0
Step 7, take-up, take-up mode can adopt solid matter winding method to carry out take-up.
4. low-resistivity aluminium alloy rod according to claim 3, is characterized in that: the time leaving standstill insulation in described step one is 45min, and in described step 2, refining time is 45min.
CN201510241012.8A 2015-05-13 2015-05-13 Low-resistivity aluminium alloy rod Active CN104805335B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201710083841.7A CN107058810B (en) 2015-05-13 2015-05-13 Corrosion-resistant low-resistivity aluminium bar
CN201710264334.3A CN107254607A (en) 2015-05-13 2015-05-13 Alloy with High Conductivity wire rod
CN201710083773.4A CN106939384B (en) 2015-05-13 2015-05-13 High-tensile aluminium alloy rod
CN201710083834.7A CN107201465B (en) 2015-05-13 2015-05-13 High hardness aluminium alloy lead wire
CN201510241012.8A CN104805335B (en) 2015-05-13 2015-05-13 Low-resistivity aluminium alloy rod

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CN201710083773.4A Division CN106939384B (en) 2015-05-13 2015-05-13 High-tensile aluminium alloy rod
CN201710083834.7A Division CN107201465B (en) 2015-05-13 2015-05-13 High hardness aluminium alloy lead wire
CN201710264334.3A Division CN107254607A (en) 2015-05-13 2015-05-13 Alloy with High Conductivity wire rod
CN201710083841.7A Division CN107058810B (en) 2015-05-13 2015-05-13 Corrosion-resistant low-resistivity aluminium bar

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CN201710264334.3A Pending CN107254607A (en) 2015-05-13 2015-05-13 Alloy with High Conductivity wire rod
CN201710083841.7A Active CN107058810B (en) 2015-05-13 2015-05-13 Corrosion-resistant low-resistivity aluminium bar
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CN201710264334.3A Pending CN107254607A (en) 2015-05-13 2015-05-13 Alloy with High Conductivity wire rod
CN201710083841.7A Active CN107058810B (en) 2015-05-13 2015-05-13 Corrosion-resistant low-resistivity aluminium bar

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CN108543828A (en) * 2018-05-10 2018-09-18 安徽润藤电缆材料科技有限公司 A kind of preparation method of aluminium bar
CN110846543B (en) * 2018-08-21 2022-05-31 国网辽宁省电力有限公司沈阳供电公司 Heat-resistant alloy monofilament and preparation method thereof
CN109338173A (en) * 2018-12-24 2019-02-15 国网冀北电力有限公司物资分公司 A kind of corrosion-resistant pure aluminum material and preparation method thereof

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CN101962723A (en) * 2010-10-27 2011-02-02 江西南缆集团有限公司 Aluminum alloy material for small-section wire rod and manufacturing method thereof
CN102634695A (en) * 2012-04-26 2012-08-15 远东电缆有限公司 High-conductivity non-heat-treatment type moderate-intensity aluminum alloy wire and production method thereof
CN102978464A (en) * 2012-11-09 2013-03-20 安徽欣意电缆有限公司 Al-Fe-Ti-RE aluminum alloy, and preparation method and power cable thereof
CN103820685A (en) * 2014-02-20 2014-05-28 无锡华能电缆有限公司 Medium strength aluminium alloy wire with conductivity of 60% IACS, and preparation method thereof
CN104561619A (en) * 2015-01-28 2015-04-29 南通昂申金属材料有限公司 Preparation method of aluminum-titanium-boron wire grain refiner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105671370A (en) * 2015-11-30 2016-06-15 合肥市科亿铝业有限公司 Rare earth aluminum alloy rod for high-speed railway

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