CN113102544B - Rolling process of high-precision electrothermal alloy flat wire - Google Patents
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- 238000005096 rolling process Methods 0.000 title claims abstract description 125
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 30
- 239000000956 alloy Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 22
- 238000005485 electric heating Methods 0.000 claims description 11
- -1 iron-chromium-aluminum Chemical compound 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 238000007127 saponification reaction Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005491 wire drawing Methods 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000005098 hot rolling Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 238000005461 lubrication Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- 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
- B21C37/045—Manufacture of wire or bars with particular section or properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/166—Rolling wire into sections or flat ribbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/20—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a non-continuous process,(e.g. skew rolling, i.e. planetary cross rolling)
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
-
- 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
- B21C37/047—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 of fine wires
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to the technical field of electrothermal alloy, in particular to a rolling process of a high-precision electrothermal alloy flat wire. At present, the size precision of flat filament products in China is not high, and cracks are easy to appear in the processing process. Based on the problems, the invention provides a rolling process of a high-precision electrothermal alloy flat wire, which is used for carrying out stress relief heat treatment on a round metal wire before multiple times of orderly rolling so that the flat wire is in a reasonable cold-hot rolling alternative rolling state in the rolling process.
Description
Technical Field
The invention relates to the technical field of electrothermal alloy, in particular to a rolling process of a high-precision electrothermal alloy flat wire.
Background
The electric heater is a heating part of the electric heater, is a core part of the electric heater, and is widely used in various fields along with the rapid development of industry and the improvement of the living standard of people.
The electric heater is mainly realized by electrifying and heating the electric heating wire, and at first, the electric heating wire is processed very originally and is mainly used after circular rough rolling, so that the application range of the electric heating wire is limited. With the development of science and technology, the processing method of the electric heating wire is continuously developed and developed, the electric heating wire with various shapes and sizes can be gradually processed, meanwhile, the electric heating pipe is developed, the electric heating wire is arranged in the pipe, and meanwhile, the insulating material with good heat transfer and heat dissipation is arranged in the pipe and isolated from air, so that the service life of the electric heating wire can be prolonged, and the use safety of the electric heating wire is greatly improved.
The electric heating wire material can be divided into round wires and special-shaped wires according to the cross section shape. The flat wire belongs to one of special-shaped wires. In the processing process of the flat wire, due to factors such as self characteristics, processing technology, equipment precision difference and the like, the processed finished flat wire product has the problems of warping, twisting and edge burrs, so that the precision of the finished flat wire product is low, and the subsequent use is influenced. Compared with other countries, the size precision of the flat filament products in China is not high at present, and cracks are easy to appear in the processing process.
Disclosure of Invention
Aiming at the problems in the prior art, the technical problems to be solved by the invention are as follows: at present, the size precision of flat filament products in China is not high, and cracks are easy to appear in the processing process.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a rolling process of a high-precision electrothermal alloy flat wire, which is carried out according to the following steps:
(1) Carrying out surface treatment such as acid washing, phosphorization, saponification and the like on a wire rod of the electrothermal alloy, and then drawing and forming by using a water tank wire drawing machine to obtain a round wire with the diameter phi =1.8 mm;
(2) And (3) rolling the round wire on a two-roller three-tandem rolling mill set repeatedly for 3 times for 9 passes, and automatically spraying emulsion for lubrication and cooling during rolling to finally obtain the high-precision electrothermal alloy flat wire with the thickness of 0.03 mm.
Specifically, the diameter of the roll is 160mm.
Specifically, before the 1 st pass rolling, the round wire in the step (2) is subjected to stress relief annealing in a continuous muffle furnace at 750 ℃ for 1-2h, and then is air-cooled to room temperature after the temperature in the muffle furnace is reduced to 500 ℃.
Specifically, the flat wire in the step (2) is subjected to stress relief annealing in a continuous muffle furnace at 650 ℃ for 1-2h before the 4 th pass of rolling, and then is air-cooled to room temperature after the temperature in the muffle furnace is reduced to 500 ℃.
Specifically, the flat wire in the step (2) is subjected to stress relief annealing in a continuous muffle furnace at 500 ℃ for 1-2h before 7 th pass rolling, and then is subjected to air cooling to room temperature.
Specifically, the electrothermal alloy in the step (1) is an iron-chromium-aluminum electrothermal alloy.
Specifically, the iron-chromium-aluminum electrothermal alloy is 0Cr25Al5, 0Cr21Al4, 0Cr23Al5 or 0Cr21Al6.
The invention has the beneficial effects that:
the hot pressing process is beneficial to improving the plasticity of the metal alloy and reducing the crack defects on the surface of the metal, but the hot pressing product has uneven structure, unstable performance and difficult control of the size precision; on the basis of the above consideration, the invention carries out multiple times of orderly stress relief heat treatment before rolling on the round metal wire, so that the flat wire is in a reasonable cold and hot rolling alternating state in the rolling process.
Drawings
FIG. 1: the invention adopts a schematic diagram of a two-roller three-tandem rolling mill group.
Detailed Description
The invention will now be described in further detail with reference to the drawings and examples.
The rolling emulsion used in the following examples of the invention was QUAKER 622.
Example 1
(1) Carrying out surface treatment such as acid washing, phosphorization, saponification and the like on a wire rod of an iron-chromium-aluminum electrothermal alloy 0Cr25Al5, and then drawing and forming the wire rod by adopting a water tank wire drawing machine to obtain a round wire with the diameter phi =1.8 mm;
(2) Rolling the round wire obtained in the step (1) on a two-roller three-continuous rolling mill set (shown in figure 1) repeatedly for 3 times for 9 passes,
before the 1 st pass rolling, the round wire is firstly subjected to stress relief annealing in a continuous muffle furnace at 750 ℃ for 1h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 1.35mm is obtained after the 1 st pass pressing
Obtaining a flat wire with the thickness of 0.77mm after 2 nd pass rolling;
obtaining a flat wire with the thickness of 0.65mm after the 3 rd pass rolling;
before the 4 th pass of rolling, the flat wire obtained by the third pass of rolling is subjected to stress relief annealing in a continuous muffle furnace at 650 ℃ for 2h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, and after the 4 th pass of rolling, the flat wire with the thickness of 0.32mm is obtained;
after 5 th pass rolling, a flat wire with the thickness of 0.21mm is obtained;
after 6 th rolling, a flat wire with the thickness of 0.12mm is obtained;
before the 7 th pass of rolling, the flat wire obtained by the 6 th pass of rolling is subjected to stress relief annealing for 1h in a continuous muffle furnace at 500 ℃, then is subjected to air cooling to room temperature, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 0.10mm is obtained after the 7 th pass of rolling;
after 8 th pass rolling, a flat wire with the thickness of 0.05mm is obtained;
after the 9 th pass rolling, 0.03mm flat wire is obtained.
And automatically spraying emulsion for lubrication and cooling during each rolling pass, and finally obtaining the high-precision electrothermal alloy flat wire with the thickness of 0.03mm after nine rolling passes.
Example 2
(1) Carrying out surface treatment such as acid washing, phosphorization, saponification and the like on a wire rod of an iron-chromium-aluminum electrothermal alloy 0Cr21Al4, and then drawing and forming the wire rod by adopting a water tank wire drawing machine to obtain a round wire with the diameter phi =1.8 mm;
(2) Placing the round wire obtained in the step (1) on a two-roller three-continuous rolling mill set for rolling, repeatedly performing 3 times for 9 passes,
before the 1 st pass rolling, the round wire is firstly subjected to stress relief annealing in a continuous muffle furnace at 750 ℃ for 1.5h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, and after the 1 st pass pressing, a flat wire with the thickness of 1.32mm is obtained
Obtaining a flat wire with the thickness of 0.75mm after 2 nd pass rolling;
obtaining a flat wire with the thickness of 0.63mm after the 3 rd pass rolling;
before the 4 th pass of rolling, the flat wire obtained by the third pass of rolling is subjected to stress relief annealing in a continuous muffle furnace at 650 ℃ for 1h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, and after the 4 th pass of rolling, the flat wire with the thickness of 0.30mm is obtained;
after 5 th pass rolling, a flat wire with the thickness of 0.20mm is obtained;
after 6 th pass rolling, a flat wire with the thickness of 0.11mm is obtained;
before the 7 th pass of rolling, the flat wire obtained by the 6 th pass of rolling is subjected to stress relief annealing in a continuous muffle furnace at 500 ℃ for 2h, then is subjected to air cooling to room temperature, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 0.08mm is obtained after the 7 th pass of rolling;
after 8 th pass rolling, a flat wire with the thickness of 0.05mm is obtained;
after the 9 th pass rolling, 0.03mm flat wire is obtained.
And automatically spraying emulsion for lubrication and cooling during each rolling pass, and finally obtaining the high-precision electrothermal alloy flat wire with the thickness of 0.03mm after nine rolling passes.
Example 3
(1) Carrying out surface treatment such as acid washing, phosphating, saponification and the like on a wire rod of an iron-chromium-aluminum electrothermal alloy 0Cr23Al5, and then carrying out drawing forming on the wire rod by adopting a water tank wire drawing machine to obtain a round wire with the diameter of phi =1.8 mm;
(2) Placing the round wire obtained in the step (1) on a two-roller three-continuous rolling mill set for rolling, repeatedly performing 3 times for 9 passes,
before the 1 st pass rolling, the round wire is firstly subjected to stress relief annealing in a continuous muffle furnace at 750 ℃ for 2h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 1.33mm is obtained after the 1 st pass pressing
Obtaining a flat wire with the thickness of 0.76mm after 2 nd pass rolling;
obtaining a flat wire with the thickness of 0.64mm after the 3 rd pass rolling;
before the 4 th pass of rolling, the flat wire obtained by the third pass of rolling is subjected to stress relief annealing in a continuous muffle furnace at 650 ℃ for 1h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, and after the 4 th pass of rolling, the flat wire with the thickness of 0.31mm is obtained;
after 5 th pass rolling, a flat wire with the thickness of 0.21mm is obtained;
after 6 th pass rolling, a flat wire with the thickness of 0.12mm is obtained;
before the 7 th pass of rolling, the flat wire obtained by the 6 th pass of rolling is subjected to stress relief annealing for 1h in a continuous muffle furnace at 500 ℃, then is subjected to air cooling to room temperature, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 0.09mm is obtained after the 7 th pass of rolling;
after 8 th pass rolling, a flat wire with the thickness of 0.06mm is obtained;
after the 9 th pass rolling, 0.03mm flat wire is obtained.
And automatically spraying emulsion for lubrication and cooling during each rolling pass, and finally obtaining the high-precision electrothermal alloy flat wire with the thickness of 0.03mm after nine rolling passes.
Example 4
(1) Carrying out surface treatment such as acid washing, phosphorization, saponification and the like on a wire rod of an iron-chromium-aluminum electrothermal alloy 0Cr21Al6, and then drawing and forming the wire rod by adopting a water tank wire drawing machine to obtain a round wire with the diameter phi =1.8 mm;
(2) Placing the round wire obtained in the step (1) on a two-roller three-continuous rolling unit for rolling, repeatedly performing 3 times for 9 passes in total,
before the 1 st pass rolling, the round wire is firstly subjected to stress relief annealing in a continuous muffle furnace at 750 ℃ for 1h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 1.35mm is obtained after the 1 st pass pressing
Obtaining a flat wire with the thickness of 0.78mm after 2 nd pass rolling;
obtaining a flat wire with the thickness of 0.66mm after the 3 rd pass rolling;
before the 4 th pass of rolling, the flat wire obtained by the third pass of rolling is subjected to stress relief annealing in a continuous muffle furnace at 650 ℃ for 2h, then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then is subjected to subsequent rolling, and after the 4 th pass of rolling, the flat wire with the thickness of 0.34mm is obtained;
after 5 th pass rolling, a flat wire with the thickness of 0.24mm is obtained;
after 6 th pass rolling, a flat wire with the thickness of 0.13mm is obtained;
before the 7 th pass of rolling, the flat wire obtained by the 6 th pass of rolling is subjected to stress relief annealing in a continuous muffle furnace at 500 ℃ for 1.5h, then is subjected to air cooling to room temperature, and then is subjected to subsequent rolling, so that the flat wire with the thickness of 0.11mm is obtained after the 7 th pass of rolling;
after 8 th pass rolling, a flat wire with the thickness of 0.04mm is obtained;
after the 9 th pass rolling, 0.03mm flat wire is obtained.
And automatically spraying emulsion for lubrication and cooling during each rolling pass, and finally obtaining the high-precision electrothermal alloy flat wire with the thickness of 0.03mm after nine rolling passes.
Comparative example 1 the same as example 1 except that in comparative example 1, before the 4 th pass rolling, the flat wire obtained by the third pass rolling was first subjected to stress relief annealing in a continuous muffle furnace at 700 ℃ for 2h, then cooled to 500 ℃ in the muffle furnace, air-cooled to room temperature, and then subjected to subsequent rolling, and after the 4 th pass rolling, the flat wire with the thickness of 0.34mm was obtained.
Comparative example 2 the same as example 1, except that in comparative example 2, before the 4 th pass rolling, the flat wire obtained by the third pass rolling is firstly subjected to stress relief annealing in a continuous muffle furnace at 600 ℃ for 2h, then cooled to 500 ℃ in the muffle furnace, cooled to room temperature in air, and then subjected to subsequent rolling, and after the 4 th pass rolling, the flat wire with the thickness of 0.34mm is obtained.
Comparative example 3 the same as example 1, except that comparative example 3 did not perform the rolling in the 4 th pass by cold rolling and did not perform the stress relief annealing before the rolling, but the flat wire obtained by the 6 th pass rolling was first subjected to the stress relief annealing in the continuous muffle furnace at 600 ℃ for 2h before the 7 th pass, and then cooled to room temperature after the temperature in the muffle furnace is reduced to 500 ℃, and then the subsequent rolling was performed.
Comparative example 4 the same as example 1 except that in comparative example 4, prior to the 7 th pass, the flat wire obtained in the 6 th pass was stress-relieved annealed in a continuous muffle furnace at 650 ℃ for 1.5 hours, then air-cooled to room temperature, and then subjected to the subsequent rolling.
Comparative example 5 is the same as example 1 except that comparative example 4 was stress-relieved annealed in a muffle furnace at 750 c just prior to the 1 st pass rolling.
And (3) performance testing:
(1) The dimensional accuracy of the flat wire is expressed by the dimensional tolerance of the thickness of the flat wire;
(2) The shape accuracy of the flat wire is expressed by flatness and warping degree;
(3) The straightness of the flat wire is within 1m, and when the flat wire forms a plane along the width and length directions and is tightly attached to a flat measuring platform, the distance between the end point tilting distance of the other end of the flat wire and the measuring platform is equal to the distance between the end point tilting distance of the flat wire and the measuring platform;
(4) The straightness of the flat wire is within 1m in length, and when one end of the flat wire, which forms a plane along the width and length directions, is attached to a flat measuring platform, the other end of the flat wire warps;
(5) And (5) observing whether the surface of the flat filament cracks or not through a magnifying glass of 5 times.
(6) The rapid life test was carried out substantially according to the experimental method in GB/T13300-91, except that a wire having a diameter of 0.8mm was replaced with the flat wire obtained in examples 1-4 of the present invention and comparative examples 1-5.
The test data of the dimensional accuracy and the shape accuracy of the flat filaments obtained in examples 1 to 4 and comparative examples 1 to 4 are shown in table 1.
TABLE 1
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A rolling process of a high-precision electrothermal alloy flat wire is characterized by comprising the following steps:
(1) Carrying out acid washing, phosphorization and saponification surface treatment on a wire rod of the electrothermal alloy, and then carrying out drawing forming by using a water tank wire drawing machine to obtain a round wire with the diameter phi =1.8 mm;
(2) Placing the round wire on a two-roller three-tandem rolling mill group for rolling, repeatedly performing 3 times, performing rolling for 9 times in total, and automatically spraying emulsion during rolling for lubricating and cooling to finally obtain a high-precision electric heating alloy flat wire with the thickness of 0.03 mm;
before the 1 st pass of rolling, the round wire in the step (2) is subjected to stress relief annealing in a continuous muffle furnace at 750 ℃ for 1-2h, and then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃;
before the 4 th pass of rolling, the flat wire in the step (2) is subjected to stress relief annealing in a continuous muffle furnace at 650 ℃ for 1-2h, and then is subjected to air cooling to room temperature after the temperature in the muffle furnace is reduced to 500 ℃;
and (3) before 7 th pass rolling, the flat wire in the step (2) is subjected to stress relief annealing in a continuous muffle furnace at 500 ℃ for 1-2h, and then is subjected to air cooling to room temperature.
2. The process of rolling high precision electrothermal alloy flat wires according to claim 1, characterized in that: the diameter of the mill roll is 160mm.
3. The rolling process of the high-precision electrothermal alloy flat wire according to claim 1, characterized in that: the electrothermal alloy in the step (1) is iron-chromium-aluminum electrothermal alloy.
4. The rolling process of the high-precision electrothermal alloy flat wire according to claim 3, characterized in that: the iron-chromium-aluminum electrothermal alloy is 0Cr25Al5, 0Cr21Al4, 0Cr23Al5 or 0Cr21Al6.
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| CN109807188A (en) * | 2019-04-01 | 2019-05-28 | 江苏兄弟合金有限公司 | A kind of heating wire continuous drawing technique |
| CN110802126A (en) * | 2019-11-26 | 2020-02-18 | 江阴法尔胜异型金属材料有限公司 | Method for processing special-shaped steel wire with trapezoidal section |
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| CN109807188A (en) * | 2019-04-01 | 2019-05-28 | 江苏兄弟合金有限公司 | A kind of heating wire continuous drawing technique |
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Denomination of invention: Rolling process of a high-precision electric heating alloy flat wire Effective date of registration: 20231007 Granted publication date: 20221129 Pledgee: Jiangsu Danyang Rural Commercial Bank Co.,Ltd. Pledgor: JIANGSU BROTHER ALLOY CO.,LTD. Registration number: Y2023980059917 |
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