CN112071505A - Post-twisting continuous annealing type aluminum alloy conductor annealing process - Google Patents
Post-twisting continuous annealing type aluminum alloy conductor annealing process Download PDFInfo
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- CN112071505A CN112071505A CN202010924636.0A CN202010924636A CN112071505A CN 112071505 A CN112071505 A CN 112071505A CN 202010924636 A CN202010924636 A CN 202010924636A CN 112071505 A CN112071505 A CN 112071505A
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- aluminum alloy
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- temperature
- stranding
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- 238000000137 annealing Methods 0.000 title claims abstract description 74
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000004020 conductor Substances 0.000 title claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 32
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 11
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 22
- 238000005491 wire drawing Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
-
- 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
- H01B13/02—Stranding-up
- H01B13/0292—After-treatment
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Non-Insulated Conductors (AREA)
Abstract
The invention discloses a post-twisting continuous annealing type aluminum alloy conductor annealing method. The method comprises the following steps: putting the stranded aluminum alloy conductor into an annealing furnace, heating to 160-200 ℃, and preserving heat for 20-40 min; continuously heating to 260 ℃ at 220 ℃ and keeping the temperature for 20-40 min; cooling to 100 ℃ and 140 ℃, and preserving heat for 5-10 min; continuously heating to 260 ℃ at 220 ℃ and keeping the temperature for 10-20 min; cooling to 140 ℃ and 180 ℃; naturally cooling to room temperature. The annealing process is performed after the aluminum alloy conductor strands are twisted, so that the annealing cost is saved, the annealing process is continuous annealing, the resistance of the wire is reduced, the economic benefit is improved, the mixed gas of nitrogen and carbon dioxide is adopted in the annealing process, the internal temperature is uniform in the temperature rising and reducing process, and the resistance value of the annealed aluminum alloy conductor is lower.
Description
Technical Field
The invention belongs to the technical field of preparation of aluminum alloy conductors, and particularly relates to a post-twisting continuous annealing type aluminum alloy conductor annealing process.
Background
At present, in the domestic cable industry, the production process of an aluminum alloy conductor is basically that single-wire drawing production is firstly carried out, the single-wire annealing treatment is also carried out in the drawing process, and in the stranding process, the single wire is deformed under the actions of extrusion, torsion, stretching and the like, so that the resistivity of the conductor is increased, the section of the conductor is increased under the condition of the same conductor resistance value, and the aluminum alloy material is wasted.
During the annealing process, to avoid the reaction between aluminum and oxygen in the air, the annealing process is generally performed in a protective gas atmosphere, and the protective gas is generally a single gas, such as nitrogen, carbon dioxide, and the like. Although the protective effect can be achieved, the temperature control in the temperature rising and reducing process is poor due to the single protective gas, uniform temperature rising is difficult to form, generally, the bottom temperature rising is fast, the upper temperature rising is slow, or the peripheral temperature rising is fast, the internal temperature rising is slow, and the temperature rising is uneven.
Disclosure of Invention
The invention aims to provide a post-twisting continuous annealing type aluminum alloy conductor annealing process.
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 160-200 ℃, and preserving heat for 20-40 min;
(3) continuously heating to 260 ℃ at 220 ℃ and keeping the temperature for 20-40 min;
(4) cooling to 100 ℃ and 140 ℃, and preserving heat for 5-10 min;
(5) continuously heating to 260 ℃ at 220 ℃ and keeping the temperature for 10-20 min;
(6) cooling to 140 ℃ and 180 ℃; naturally cooling to room temperature.
And (3) the heating rate of the step (2) is 6 ℃/min.
And (4) heating and temperature rising rate in the step (3) is 4 ℃/min.
And (4) the cooling rate is 8 ℃/min.
And (5) the heating rate is 6 ℃/min.
And (6) the cooling rate is 8 ℃/min.
The annealing treatment is carried out in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1.
the invention has the beneficial effects that: the annealing process is performed after the aluminum alloy conductor strands are twisted, so that the annealing cost is saved, the annealing process is continuous annealing, the resistance of the wire is reduced, the economic benefit is improved, the mixed gas of nitrogen and carbon dioxide is adopted in the annealing process, the internal temperature is uniform in the temperature rising and reducing process, and the resistance value of the annealed aluminum alloy conductor is lower.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 180 ℃ at the speed of 6 ℃/min, and preserving heat for 30 min; the annealing treatment is carried out in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1;
(3) continuously heating to 240 ℃ at the speed of 4 ℃/min, and keeping the temperature for 30 min;
(4) cooling to 120 deg.C at a rate of 8 deg.C/min, and maintaining for 8 min;
(5) continuously heating to 240 ℃ at the speed of 6 ℃/min, and keeping the temperature for 15 min;
(6) cooling to 160 ℃ at the speed of 8 ℃/min; naturally cooling to room temperature.
Example 2
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 160 ℃ at the speed of 6 ℃/min, and preserving heat for 40 min; the annealing treatment is carried out in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1;
(3) continuously heating to 220 ℃ at the speed of 4 ℃/min, and keeping the temperature for 40 min;
(4) cooling to 100 deg.C at a rate of 8 deg.C/min, and maintaining for 10 min;
(5) continuously heating to 220 ℃ at the speed of 6 ℃/min, and keeping the temperature for 20 min;
(6) cooling to 140 deg.C at a rate of 8 deg.C/min; naturally cooling to room temperature.
Example 3
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 200 ℃ at the speed of 6 ℃/min, and preserving heat for 20 min; the annealing treatment is carried out in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1;
(3) continuously heating to 260 ℃ at the speed of 4 ℃/min, and keeping the temperature for 20 min;
(4) cooling to 140 deg.C at a rate of 8 deg.C/min, and maintaining for 5 min;
(5) continuously heating to 260 ℃ at the speed of 6 ℃/min, and keeping the temperature for 10 min;
(6) cooling to 180 ℃ at the speed of 8 ℃/min; naturally cooling to room temperature.
Example 4
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 180 ℃ at the speed of 6 ℃/min, and preserving heat for 25 min; the annealing treatment is carried out in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1;
(3) continuously heating to 250 deg.C at a rate of 4 deg.C/min, and maintaining for 25 min;
(4) cooling to 130 deg.C at a rate of 8 deg.C/min, and maintaining for 6 min;
(5) continuously heating to 230 ℃ at the speed of 6 ℃/min, and keeping the temperature for 12 min;
(6) cooling to 170 ℃ at the speed of 8 ℃/min; naturally cooling to room temperature.
Comparative example 1
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 180 ℃ at the speed of 6 ℃/min, and preserving heat for 30 min; the annealing treatment is carried out in a protective medium, and the protective medium is nitrogen;
(3) continuously heating to 240 ℃ at the speed of 4 ℃/min, and keeping the temperature for 30 min;
(4) cooling to 120 deg.C at a rate of 8 deg.C/min, and maintaining for 8 min;
(5) continuously heating to 240 ℃ at the speed of 6 ℃/min, and keeping the temperature for 15 min;
(6) cooling to 160 ℃ at the speed of 8 ℃/min; naturally cooling to room temperature.
Comparative example 2
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 180 ℃ at the speed of 6 ℃/min, and preserving heat for 30 min; the annealing treatment is carried out in a protective medium, and the protective medium is carbon dioxide;
(3) continuously heating to 240 ℃ at the speed of 4 ℃/min, and keeping the temperature for 30 min;
(4) cooling to 120 deg.C at a rate of 8 deg.C/min, and maintaining for 8 min;
(5) continuously heating to 240 ℃ at the speed of 6 ℃/min, and keeping the temperature for 15 min;
(6) cooling to 160 ℃ at the speed of 8 ℃/min; naturally cooling to room temperature.
Comparative example 3
A post-twisting continuous annealing type aluminum alloy conductor annealing method comprises the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 180 ℃ at the speed of 8 ℃/min, and preserving heat for 30 min; the annealing treatment is carried out in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1;
(3) continuously heating to 240 ℃ at the speed of 8 ℃/min, and keeping the temperature for 30 min;
(4) cooling to 120 deg.C at a rate of 10 deg.C/min, and maintaining for 8 min;
(5) continuously heating to 240 ℃ at the speed of 6 ℃/min, and keeping the temperature for 15 min;
(6) cooling to 160 ℃ at the speed of 8 ℃/min; naturally cooling to room temperature.
Experimental example:
the resistance values of the stranded aluminum alloy conductors of examples 1 to 4 and comparative examples 1 to 3 were measured, and the decrease values of the resistance values were calculated: (resistance value before annealing-resistance value after annealing)/resistance value before annealing X100%
The test results are shown in table 1:
TABLE 1
Note: represents P <0.05 compared to the example 1 group.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A post-twisting continuous annealing type aluminum alloy conductor annealing method is characterized by comprising the following steps:
(1) stranding the aluminum alloy single wire produced in the wire drawing process into a stranded aluminum alloy conductor with a required section through a wire stranding process;
(2) putting the stranded aluminum alloy conductor into an annealing furnace, heating to 160-200 ℃, and preserving heat for 20-40 min;
(3) continuously heating to 260 ℃ at 220 ℃ and keeping the temperature for 20-40 min;
(4) cooling to 100 ℃ and 140 ℃, and preserving the heat for 5-10 min.
(5) Continuously heating to 260 ℃ at 220 ℃ and keeping the temperature for 10-20 min;
(6) cooling to 140 ℃ and 180 ℃; naturally cooling to room temperature.
2. The annealing method of an aluminum alloy conductor after stranding and continuous annealing type as claimed in claim 1, wherein the heating rate of the step (2) is 6 ℃/min.
3. The annealing method of an aluminum alloy conductor after stranding and continuous annealing type as claimed in claim 1, wherein the heating rate of the step (3) is 4 ℃/min.
4. The annealing method of the post-stranding continuous annealing type aluminum alloy conductor according to claim 1, wherein the rate of temperature reduction in the step (4) is 8 ℃/min.
5. The annealing method of an aluminum alloy conductor after stranding and continuous annealing type as claimed in claim 1, wherein the heating rate of the step (5) is 6 ℃/min.
6. The annealing method of an aluminum alloy conductor after stranding and continuous annealing type as claimed in claim 1, wherein the rate of temperature reduction in the step (6) is 8 ℃/min.
7. The annealing method of the post-stranding continuous annealing type aluminum alloy conductor according to claim 1, wherein the annealing treatment is performed in a protective medium, the protective medium is a mixed gas of nitrogen and carbon dioxide, and the mixing ratio is 1: 1.
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| CN202010924636.0A CN112071505A (en) | 2020-09-05 | 2020-09-05 | Post-twisting continuous annealing type aluminum alloy conductor annealing process |
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| CN202010924636.0A CN112071505A (en) | 2020-09-05 | 2020-09-05 | Post-twisting continuous annealing type aluminum alloy conductor annealing process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181618A (en) * | 2011-04-18 | 2011-09-14 | 天津市亿博制钢有限公司 | Protective gas for annealing of metal materials |
| JP2012082479A (en) * | 2010-10-13 | 2012-04-26 | Audio Labo Corp | Method for producing metal material, and metal material |
| CN103668015A (en) * | 2013-12-14 | 2014-03-26 | 苏州戴尔曼电器有限公司 | Annealing process of aluminum alloy cable conductor |
| CN104240791A (en) * | 2014-09-30 | 2014-12-24 | 国网河南省电力公司周口供电公司 | Rare earth aluminum alloy conductor material and annealing process thereof |
| CN105648265A (en) * | 2015-12-29 | 2016-06-08 | 宁波会德丰铜业有限公司 | Brass tube and preparation method thereof |
| CN105845193A (en) * | 2016-04-20 | 2016-08-10 | 无锡市苏南电缆有限公司 | Layered aluminum alloy conductor and annealing process thereof |
-
2020
- 2020-09-05 CN CN202010924636.0A patent/CN112071505A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012082479A (en) * | 2010-10-13 | 2012-04-26 | Audio Labo Corp | Method for producing metal material, and metal material |
| CN102181618A (en) * | 2011-04-18 | 2011-09-14 | 天津市亿博制钢有限公司 | Protective gas for annealing of metal materials |
| CN103668015A (en) * | 2013-12-14 | 2014-03-26 | 苏州戴尔曼电器有限公司 | Annealing process of aluminum alloy cable conductor |
| CN104240791A (en) * | 2014-09-30 | 2014-12-24 | 国网河南省电力公司周口供电公司 | Rare earth aluminum alloy conductor material and annealing process thereof |
| CN105648265A (en) * | 2015-12-29 | 2016-06-08 | 宁波会德丰铜业有限公司 | Brass tube and preparation method thereof |
| CN105845193A (en) * | 2016-04-20 | 2016-08-10 | 无锡市苏南电缆有限公司 | Layered aluminum alloy conductor and annealing process thereof |
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Application publication date: 20201211 |