Preparation process of iron-chromium alloy wire for electrode sealing

Abstract

The present application relates to the technical field of metal forming, in particular to a preparation process of iron-chromium alloy wire for electrode sealing. The present application realizes efficient preparation of iron-chromium alloy wire through the steps of peeling, polishing, rough drawing, intermediate annealing, rough drawing, continuous annealing, electrolysis, pickling and the like. The pickling solution comprises the following components by weight: 10-20 parts of hydrochloric acid, 0.1-2.0 parts of hydrofluoric acid, 0.1-1.0 parts of corrosion inhibitor, 0.1-0.3 parts of surfactant, and 80-90 parts of deionized water. The iron-chromium alloy wire prepared by the present application not only has a high smoothness and a uniform surface, but also has excellent mechanical properties and excellent cold heading performance, meeting the requirements of the electrode sealing industry on metal materials.

Description

Technical Field

[0001] This invention relates to the field of metal forming technology, specifically to a process for preparing iron-chromium alloy wire for electrode sealing. Background Technology

[0002] In recent years, the rapid development of new energy vehicles has led to a continuous increase in the demand for batteries, which in turn has driven the rapid growth in demand for battery manufacturing materials. However, in the battery manufacturing process, key electrode sealing materials, especially metal core materials that come into direct contact with glass or ceramics, are still under development. Currently, electrode sealing materials such as molybdenum and tungsten alloys have begun to be researched and applied in the market, but these materials suffer from problems such as high cost and difficulty in processing. Under extreme environments such as high temperature, high vacuum, and corrosion, traditional electrode sealing materials are prone to brittle fracture and corrosion, reducing their durability and reliability.

[0003] Therefore, we propose a preparation process for iron-chromium alloy wire for electrode sealing. Summary of the Invention

[0004] The purpose of this invention is to provide a process for preparing iron-chromium alloy wire for electrode sealing, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A process for preparing an iron-chromium alloy wire for electrode sealing includes the following steps:

[0007] Step S1: Prepare wire rod through smelting and rolling; peel and polish the wire rod for the first time;

[0008] Step S2: Roughly draw the wire rod after the first polishing, then perform intermediate annealing and a second polishing;

[0009] Step S3: After the second polishing, the wire rod is roughly drawn, followed by continuous annealing, electrolysis, pickling, and fine drawing to obtain iron-chromium alloy wire.

[0010] Furthermore, in step S1, the mass percentage content of each component of the wire rod is: C≤0.12%, Si≤0.7%, Mn≤1%, P≤0.02%, S≤0.02%, Ni≤0.5%, Cr: 27-29%, with the balance being Fe.

[0011] Furthermore, in step S1, the peeling is performed using a wire rod peeling machine with a peeling depth of 0.3-0.5 mm, a wire feed speed of 5-10 m / min, and a rotation speed of 900-1100 r / min.

[0012] Furthermore, the polishing is performed using a belt polishing machine.

[0013] Furthermore, in step S2, the rough drawing is performed using an inverted wire drawing machine, with 1-3 passes. Before each pass, a lubricant is applied to the surface. The deformation per pass is 25-30%, and the diameter of the wire rod after rough drawing is 5.3-5.7 mm.

[0014] Furthermore, the lubricant is a mixture of lime powder and zinc stearate in a mass ratio of 1:4.

[0015] Furthermore, in step S2, the intermediate annealing is carried out in a pit furnace at a temperature of 850-900℃ for 2-3 hours, followed by air cooling.

[0016] Furthermore, in step S3, the rough drawing is performed using a straight-line wire drawing machine, with 1-3 passes. Before each pass, a coating agent is applied to the surface. After drying, a lubricant is used for drawing. The deformation per pass is 18-25%, and the diameter of the wire rod after rough drawing is 1.8-2.2 mm.

[0017] Furthermore, the coating agent is a chromium-free coating agent, model CA-Q01.

[0018] Furthermore, in step S3, the continuous annealing temperature is 840-860℃, and the annealing speed is 4-6m / min.

[0019] Furthermore, in step S3, the electrolysis process conditions are: electrolysis temperature 40-90℃, current intensity 4500-5500A, and the electrolytic solution is a neutral sodium sulfate solution of 130-210g / L.

[0020] Furthermore, in step S3, the pickling solution comprises the following components by weight: 10-20 parts hydrochloric acid, 0.1-2.0 parts hydrofluoric acid, 0.1-1.0 parts corrosion inhibitor, 0.1-0.3 parts surfactant, and 80-90 parts deionized water.

[0021] Furthermore, the preparation method of the corrosion inhibitor is as follows:

[0022] Step (1): Mix glycidyl linoleate and anhydrous ethanol evenly, heat to 40-50℃, add 3-hydroxy-L-tyrosine and mix evenly, react for 3-5 hours, and after washing and filtration, obtain modified glycidyl linoleate.

[0023] Step (2): Under nitrogen protection, the modified glycidyl linoleate, 2-styrenebenzothiazole and toluene are mixed evenly, heated to 75-85℃, and ammonium persulfate and hydroquinone solution are added and mixed evenly. The reaction is carried out for 2-4 hours. After washing, filtering and drying, compound A is obtained.

[0024] Step (3): Mix compound A with diethylenetriamine and xylene evenly, heat to 150-160℃, react for 2-3 hours, continue to heat to 210-220℃, react for 3-5 hours, cool to 100-110℃, add benzyl chloride, reflux for 3-4 hours, and obtain the corrosion inhibitor by rotary evaporation.

[0025] In the above technical solution, a carboxyl group is introduced by reacting the epoxy group in glycidyl linoleate with the amino group of 3-hydroxy-L-tyrosine to obtain modified glycidyl linoleate. Subsequently, under the action of an initiator, the double bond in the modified glycidyl linoleate reacts with 2-styrylbenzothiazole to obtain compound A, which introduces a benzothiazole structure. This structure can be adsorbed onto the metal surface through strong interactions, forming a protective film that effectively slows down the corrosion rate of the metal. Finally, the carboxyl group in compound A undergoes an amidation reaction with the amino group in diethylenetriamine, followed by a cyclization reaction to synthesize an imidazoline intermediate. A quaternizing agent, benzyl chloride, is introduced to react with the intermediate to obtain a water-soluble corrosion inhibitor that can effectively inhibit corrosion in aqueous corrosive media, protecting metal materials from corrosion damage and thus producing a material with a smooth and bright surface.

[0026] Furthermore, in step (1), the mass ratio of glycidyl linoleate, anhydrous ethanol and 3-hydroxy-L-tyrosine is 1:(5-10):(0.4-0.6).

[0027] Furthermore, in step (2), the mass ratio of modified glycidyl linoleate, 2-styrenebenzothiazole and toluene is 1:(1.0-1.5):(4-6).

[0028] Furthermore, in step (2), the mass of ammonium persulfate is 3-5% of the mass of modified glycidyl linoleate.

[0029] Furthermore, in step (2), the concentration of the hydroquinone solution is 5-6 wt%, and its amount is 1-3% of the mass of the modified glycidyl linoleate.

[0030] Furthermore, in step (3), the mass ratio of compound A to diethylenetriamine and xylene is 1:(0.3-0.5):(1.5-2.0).

[0031] Furthermore, in step (3), the mass of benzyl chloride is 35-45% of the mass of compound A.

[0032] Furthermore, the surfactant is lauryl alcohol polyoxyethylene ether.

[0033] Furthermore, in step S3, the pickling process conditions are: pickling temperature 45-85℃, pickling time 30-40min.

[0034] Furthermore, in step S3, the fine drawing is performed using an inverted wire drawing machine, with 1-3 passes. Before each pass, a lubricant is applied to the surface. The deformation per pass is 8-10%, and the diameter of the wire rod after fine drawing is 1.7-2.1 mm.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. The present invention discloses a preparation process for iron-chromium alloy wire for electrode sealing. Through a carefully designed process flow, including peeling, polishing, drawing, annealing, electrolysis, and pickling, the efficient preparation of iron-chromium alloy wire is achieved. By optimizing process parameters, a processing procedure with fewer passes, stable deformation, and high efficiency is achieved. By optimizing the annealing process, the microstructure of the alloy wire is effectively improved, giving it uniform microstructure and excellent cold heading performance, thereby improving the product's processing performance and stability, and meeting the requirements of the battery electrode sealing industry for metal materials. Through surface treatment, a high-gloss, uniformly smooth iron-chromium alloy wire product is obtained, meeting the high requirements of electrode sealing applications.

[0037] 2. A preparation process for an iron-chromium alloy wire for electrode sealing according to the present invention involves reacting the epoxy group in glycidyl linoleate with the amino group of 3-hydroxy-L-tyrosine to introduce a carboxyl group, resulting in modified glycidyl linoleate. Subsequently, under the action of an initiator, the double bond in the modified glycidyl linoleate reacts with 2-styrene-benzothiazole to obtain compound A, introducing a benzothiazole structure. This structure can be adsorbed onto the metal surface through strong interactions, forming a protective film that effectively slows down the corrosion rate of the metal. Finally, the carboxyl group in compound A undergoes an amidation reaction with the amino group in diethylenetriamine, followed by a cyclization reaction to synthesize an imidazoline intermediate. This intermediate is then reacted with the quaternizing agent benzyl chloride to obtain a water-soluble corrosion inhibitor. By adding the corrosion inhibitor to the pickling solution, the pickling process can be effectively improved, protecting the surface quality of the alloy wire and enhancing the quality and reliability of the product. Detailed Implementation

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In this embodiment, the wire rod is φ6-8mm in size and is sourced from Shanghai Gangda Supply Chain (Group) Co., Ltd.; the coating agent is a chromium-free coating agent, model CA-Q01, sourced from Jinhua Hongxin New Material Technology Co., Ltd.

[0040] In the following examples and comparative examples, 1 part equals 50g.

[0041] Example 1: A process for preparing an iron-chromium alloy wire for electrode sealing, comprising the following steps:

[0042] Step S1: Prepare wire rod by smelting and rolling; peel the wire rod (peeling is done using a wire rod peeling machine, peeling depth is 0.3mm, feed speed is 5m / min, rotation speed is 900r / min), and perform the first sand belt polishing;

[0043] Step S2: The wire rod after the first polishing is rough drawn (the rough drawing is carried out using an inverted wire drawing machine, with one pass of rough drawing. Before each pass, a lubricant is applied to the surface, and the deformation amount per pass is 30%). Then, intermediate annealing is carried out (using a pit furnace, the annealing temperature is 850℃, the time is 2 hours, and it is then air-cooled after being lifted out). The second sand belt polishing is then performed.

[0044] Step S3: The wire rod after the second polishing is rough drawn (rough drawing is performed using a straight wire drawing machine, with 2 passes. Before each pass, a coating agent is applied to the surface. After drying, a lubricant is used for drawing, and the deformation per pass is 20%). Then, continuous annealing is performed (annealing temperature 840℃, annealing speed 4m / min), electrolysis (electrolysis temperature 40℃, current intensity 4500A, electrolytic solution is 130g / L neutral sodium sulfate solution), pickling (pickling temperature 45℃, pickling time 30min), and fine drawing (using an inverted wire drawing machine, with 3 passes. Before each pass, a lubricant is applied to the surface, and the deformation per pass is 8%) to obtain iron-chromium alloy wire.

[0045] In step S3, the pickling solution comprises the following components by weight: 10 parts hydrochloric acid, 0.1 parts hydrofluoric acid, 0.1 parts corrosion inhibitor, 0.1 parts surfactant, and 80 parts deionized water;

[0046] The preparation method of the corrosion inhibitor is as follows:

[0047] Step (1): Mix 0.2 parts of glycidyl linoleate and 1 part of anhydrous ethanol evenly, heat to 45°C, add 0.08 parts of 3-hydroxy-L-tyrosine and mix evenly. React for 3 hours. After washing and filtration, the modified glycidyl linoleate is obtained.

[0048] Step (2): Under nitrogen protection, 0.2 parts of modified glycidyl linolenic acid, 0.2 parts of 2-styrenebenzothiazole and 0.8 parts of toluene were mixed evenly, heated to 75°C, and 0.006 parts of ammonium persulfate and 0.002 parts of 5wt% hydroquinone solution were added and mixed evenly. The mixture was reacted for 2 hours, and after washing, filtration and drying, compound A was obtained.

[0049] Step (3): Mix 0.2 parts of compound A, 0.06 parts of diethylenetriamine, and 0.3 parts of xylene evenly, heat to 150°C, react for 2 hours, continue to heat to 210°C, react for 3 hours, cool to 100°C, add 0.07 parts of benzyl chloride, reflux for 3 hours, and obtain the corrosion inhibitor by rotary evaporation.

[0050] Example 2: A process for preparing an iron-chromium alloy wire for electrode sealing, comprising the following processes:

[0051] Step S1: Prepare wire rod by smelting and rolling; peel the wire rod (peeling is done using a wire rod peeling machine, peeling depth is 0.4mm, feed speed is 8m / min, rotation speed is 1000r / min), and perform the first sand belt polishing;

[0052] Step S2: The wire rod after the first polishing is rough drawn (the rough drawing is carried out using an inverted wire drawing machine, with two passes. Before each pass, a lubricant is applied to the surface, and the deformation per pass is 28%). Then, intermediate annealing is carried out (using a pit furnace, the annealing temperature is 870℃, the time is 2.5h, and it is then air-cooled after being lifted out), followed by a second sand belt polishing.

[0053] Step S3: The wire rod after the second polishing is rough drawn (rough drawing is performed using a straight wire drawing machine, 3 passes, a coating agent is applied to the surface before each pass, and after drying, a lubricant is used for drawing, with a single pass deformation of 18%), followed by continuous annealing (annealing temperature 850℃, annealing speed 5m / min), electrolysis (electrolysis temperature 60℃, current intensity 5000A, electrolytic solution is 160g / L neutral sodium sulfate solution), pickling (pickling temperature 60℃, pickling time 35min), and fine drawing (using an inverted wire drawing machine, 2 passes, a lubricant is applied to the surface before each pass, with a single pass deformation of 9%), to obtain iron-chromium alloy wire;

[0054] In step S3, the pickling solution comprises the following components by weight: 15 parts hydrochloric acid, 1 part hydrofluoric acid, 0.5 parts corrosion inhibitor, 0.2 parts surfactant, and 85 parts deionized water.

[0055] The preparation method of the corrosion inhibitor is as follows:

[0056] Step (1): Mix 0.5 parts of glycidyl linolenic acid and 4 parts of anhydrous ethanol evenly, heat to 45°C, add 0.25 parts of 3-hydroxy-L-tyrosine and mix evenly. React for 4 hours. After washing and filtration, the modified glycidyl linolenic acid is obtained.

[0057] Step (2): Under nitrogen protection, 0.5 parts of modified glycidyl linolenic acid, 0.6 parts of 2-styrenebenzothiazole and 2.5 parts of toluene were mixed evenly, heated to 80°C, and 0.015 parts of ammonium persulfate and 0.01 parts of 5.5 wt% hydroquinone solution were added and mixed evenly. The mixture was reacted for 3 hours. After washing, filtering and drying, compound A was obtained.

[0058] Step (3): Mix 0.5 parts of compound A, 0.2 parts of diethylenetriamine, and 0.9 parts of xylene evenly, heat to 155°C, react for 2.5 h, continue to heat to 215°C, react for 4 h, cool to 105°C, add 0.2 parts of benzyl chloride, reflux for 3.5 h, and obtain the corrosion inhibitor by rotary evaporation.

[0059] Example 3: A process for preparing an iron-chromium alloy wire for electrode sealing, comprising the following processes:

[0060] Step S1: Prepare wire rod by smelting and rolling; peel the wire rod (peeling is done by a wire rod peeling machine, peeling depth is 0.5mm, feed speed is 10m / min, rotation speed is 1100r / min), and perform the first sand belt polishing;

[0061] Step S2: The wire rod after the first polishing is rough drawn (the rough drawing is carried out using an inverted wire drawing machine, with 3 passes. Before each pass, a lubricant is applied to the surface, and the deformation per pass is 25%). Then, intermediate annealing is carried out (using a pit furnace, the annealing temperature is 900℃, the time is 3 hours, and it is then air-cooled after being lifted out). The second sand belt polishing is then performed.

[0062] Step S3: The wire rod after the second polishing is rough drawn (rough drawing is performed using a straight wire drawing machine, one pass, a coating agent is applied to the surface before each pass, and after drying, a lubricant is used for drawing, with a single pass deformation of 25%), followed by continuous annealing (annealing temperature 860℃, annealing speed 6m / min), electrolysis (electrolysis temperature 90℃, current intensity 5500A, electrolytic solution is 210g / L neutral sodium sulfate solution), pickling (pickling temperature 85℃, pickling time 40min), and fine drawing (using an inverted wire drawing machine, one pass, a lubricant is applied to the surface before each pass, with a single pass deformation of 10%), to obtain iron-chromium alloy wire;

[0063] In step S3, the pickling solution comprises the following components by weight: 20 parts hydrochloric acid, 2.0 parts hydrofluoric acid, 1.0 part corrosion inhibitor, 0.3 parts surfactant, and 90 parts deionized water;

[0064] The preparation method of the corrosion inhibitor is as follows:

[0065] Step (1): Mix 1 part glycidyl linoleate and 10 parts anhydrous ethanol evenly, heat to 50°C, add 0.6 parts 3-hydroxy-L-tyrosine and mix evenly. React for 5 hours. After washing and filtration, the modified glycidyl linoleate is obtained.

[0066] Step (2): Under nitrogen protection, 1 part of modified glycidyl linolenic acid, 1.5 parts of 2-styrenebenzothiazole and 6 parts of toluene were mixed evenly, heated to 85°C, and 0.05 parts of ammonium persulfate and 0.03 parts of 6wt% hydroquinone solution were added and mixed evenly. The mixture was reacted for 4 hours, and after washing, filtering and drying, compound A was obtained.

[0067] Step (3): Mix 1 part of compound A, 0.5 parts of diethylenetriamine, and 2 parts of xylene evenly, heat to 160°C, react for 3 hours, continue to heat to 220°C, react for 5 hours, cool to 110°C, add 0.45 parts of benzyl chloride, reflux for 4 hours, and obtain the corrosion inhibitor by rotary evaporation.

[0068] Comparative Example 1: A process for preparing an iron-chromium alloy wire for electrode sealing, comprising the following steps:

[0069] Compared with Example 1, the continuous annealing temperature of Comparative Example 1 was 900°C, and the other steps were the same as those in Example 1.

[0070] Comparative Example 2: A process for preparing an iron-chromium alloy wire for electrode sealing, comprising the following processes:

[0071] Compared with Example 2, Comparative Example 2 replaced the corrosion inhibitor with the same mass of sodium benzoate, and the other steps were the same as in Example 2.

[0072] Comparative Example 3: A process for preparing an iron-chromium alloy wire for electrode sealing, comprising the following processes:

[0073] The preparation method of the corrosion inhibitor is as follows:

[0074] Step (1): Mix 0.5 parts of glycidyl linolenic acid and 4 parts of anhydrous ethanol evenly, heat to 45°C, add 0.25 parts of 3-hydroxy-L-tyrosine and mix evenly. React for 4 hours. After washing and filtration, the modified glycidyl linolenic acid is obtained.

[0075] Step (2): Under nitrogen protection, 0.5 parts of modified glycidyl linolenic acid, 1.5 parts of 2-styrylbenzothiazole and 2.5 parts of toluene were mixed evenly, heated to 80°C, and 0.015 parts of ammonium persulfate and 0.01 parts of 5.5 wt% hydroquinone solution were added and mixed evenly. The mixture was reacted for 3 hours. After washing, filtering and drying, compound A was obtained.

[0076] Step (3): Mix 0.5 parts of compound A, 0.2 parts of diethylenetriamine, and 0.9 parts of xylene evenly, heat to 155°C, react for 2.5 h, continue to heat to 215°C, react for 4 h, cool to 105°C, add 0.2 parts of benzyl chloride, reflux for 3.5 h, and obtain the corrosion inhibitor by rotary evaporation;

[0077] Compared with Example 2, in step (2) of Comparative Example 3, the mass ratio of modified glycidyl linoleate to 2-styrenebenzothiazole is 1:3; the other steps are the same as in Example 2.

[0078] Experiment: Samples were prepared from the iron-chromium alloy wires obtained in Examples 1-3 and Comparative Examples 1-3. Their properties were tested and the results were recorded.

[0079] According to GB / T 228.1-2021 "Metallic materials - Tensile testing - Part 1: Test method at room temperature", tensile strength, yield strength, elongation and reduction of area were determined using an electronic universal testing machine at a tensile speed of 1 mm / min.

[0080] Weigh the mass before and after pickling, and calculate the pickling loss = mass loss before and after pickling / weight before pickling.

[0081] Test Results

[0082] Example 1 748 595 28 57 0.5 Example 2 750 600 30 58 0.4 Example 3 745 589 27 56 0.6 Comparative Example 1 694 557 21 53 0.7 Comparative Example 2 740 583 25 54 1.5 Comparative Example 3 743 586 26 55 0.8

[0083] Based on the data in the table above, the following conclusions can be clearly drawn:

[0084] 1. Compared with Examples 1-3, the mechanical properties of the product obtained in Comparative Example 1 decreased, indicating that the filament prepared by the present invention is affected by its annealing process. By optimizing the annealing process, the mechanical properties of the material can be effectively improved.

[0085] 2. Compared with Examples 1-3, the pickling loss of the product obtained in Comparative Example 2 increased, which indicates that the corrosion inhibitor prepared in this invention can effectively reduce pickling loss and improve pickling efficiency and quality compared with sodium benzoate.

[0086] 3. Compared with Examples 1-3, the pickling loss of the product obtained in Comparative Example 3 increased. It can be seen that the performance of the corrosion inhibitor prepared by the present invention is affected by the ratio of each reagent in its preparation process. By selecting the mass ratio within the range, the prepared corrosion inhibitor has excellent anti-corrosion performance and stability, thereby reducing the loss of metal in the pickling process and improving product quality.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process method article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process method article or apparatus.

[0088] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A process for preparing iron-chromium alloy wire for electrode sealing, characterized in that: Includes the following steps: Step S1: Prepare wire rod through smelting and rolling; peel and polish the wire rod for the first time; Step S2: Roughly draw the wire rod after the first polishing, then perform intermediate annealing and a second polishing; Step S3: The wire rod after the second polishing is roughly drawn, followed by continuous annealing, electrolysis, pickling, and fine drawing to obtain iron-chromium alloy wire. In step S3, the pickling solution comprises the following components by weight: 10-20 parts hydrochloric acid, 0.1-2.0 parts hydrofluoric acid, 0.1-1.0 parts corrosion inhibitor, 0.1-0.3 parts surfactant, and 80-90 parts deionized water. The corrosion inhibitor is prepared as follows: Step (1): Mix glycidyl linoleate and anhydrous ethanol evenly, heat to 40-50℃, add 3-hydroxy-L-tyrosine and mix evenly, react for 3-5 hours, and after washing and filtration, obtain modified glycidyl linoleate. Step (2): Under nitrogen protection, the modified glycidyl linoleate, 2-styrenebenzothiazole and toluene are mixed evenly, heated to 75-85℃, and ammonium persulfate and hydroquinone solution are added and mixed evenly. The reaction is carried out for 2-4 hours. After washing, filtering and drying, compound A is obtained. Step (3): Mix compound A with diethylenetriamine and xylene evenly, heat to 150-160℃, react for 2-3 hours, continue to heat to 210-220℃, react for 3-5 hours, cool to 100-110℃, add benzyl chloride, reflux for 3-4 hours, and obtain the corrosion inhibitor by rotary evaporation.

2. The preparation process of the iron-chromium alloy wire for electrode sealing according to claim 1, characterized in that: In step S1, the mass percentage content of each component of the wire rod is: C≤0.12%, Si≤0.7%, Mn≤1%, P≤0.02%, S≤0.02%, Ni≤0.5%, Cr: 27-29%, with the balance being Fe.

3. The preparation process of the iron-chromium alloy wire for electrode sealing according to claim 1, characterized in that: In step S1, the stripping is performed using a wire rod stripping machine with a stripping depth of 0.3-0.5 mm, a feed speed of 5-10 m / min, and a rotation speed of 900-1100 r / min.

4. The preparation process of the iron-chromium alloy wire for electrode sealing according to claim 1, characterized in that: In step S2, the rough drawing is performed using an inverted wire drawing machine, with 1-3 passes. Before each pass, a lubricant is applied to the surface. The deformation per pass is 25-30%, and the diameter of the wire rod after rough drawing is 5.3-5.7 mm.

5. The preparation process of the iron-chromium alloy wire for electrode sealing according to claim 1, characterized in that: In step S3, the rough drawing is performed using a straight-line wire drawing machine, with 1-3 passes. Before each pass, a coating agent is applied to the surface. After drying, a lubricant is used for drawing. The deformation per pass is 18-25%, and the diameter of the wire rod after rough drawing is 1.8-2.2 mm.

6. The preparation process of the iron-chromium alloy wire for electrode sealing according to claim 1, characterized in that: In step S3, the continuous annealing temperature is 840-860℃, and the annealing rate is 4-6m / min.

7. The preparation process of the iron-chromium alloy wire for electrode sealing according to claim 1, characterized in that: In step S3, the fine drawing is performed using an inverted wire drawing machine, with 1-3 passes. Before each pass, a lubricant is applied to the surface. The deformation per pass is 8-10%, and the diameter of the wire rod after fine drawing is 1.7-2.1 mm.

8. An iron-chromium alloy wire for electrode sealing prepared by the preparation process according to any one of claims 1-7.