Production method for reducing surface wrinkles of high-silicon spring steel wire rod

Abstract

The invention discloses a production method for reducing surface wrinkles of a high-silicon spring steel wire rod. The production method comprises a bloom heating procedure, a rough rolling procedure, a flame cleaning procedure, a procedure of continuous rolling to form an intermediate square billet, a water cooling procedure, a slow cooling procedure, an intermediate square billet shot blasting and flaw detection procedure, a high-speed wire rod heating procedure and a high-speed wire rod rough rolling, intermediate rolling and finish rolling procedure which are sequentially carried out. According to the production method, starting from a rolled piece, the rolling deformation capacity of the rolled piece is improved, the non-uniformity of rolling deformation of the rolled piece is reduced, particularly the non-uniformity of corner deformation of the rolled piece is reduced, and therefore surface wrinkles of the high-silicon spring steel wire are reduced, and the depth is controlled within 0.03 mm.

Description

Technical Field

[0001] The invention belongs to the technical field of spring steel rolling, and in particular relates to a production method for reducing surface wrinkles of a high-silicon spring steel wire. Background Art

[0002] Surface wrinkle (surface wrinkle defect) is a typical surface defect, which manifests as multiple or clustered shallow cracks distributed along the longitudinal direction of the rolled piece. In severe cases, the depth exceeds 0.1mm. Spring steel needs to withstand a high deformation during drawing processing. Under actual working conditions, it must withstand high-frequency dynamic loads and alternating loads. Therefore, surface quality is the top priority of spring steel wire. At present, the transverse surface defects of spring steel can basically be identified and polished through through-type flaw detection in the drawing process, but longitudinal defects such as wrinkles cannot be identified by flaw detection equipment and will be inherited to the steel wire and the finished spring, causing the high-strength steel wire to break and the finished spring to fail due to fatigue. Therefore, how to eliminate or reduce surface wrinkles on spring steel wire is an urgent problem that many steel research scholars need to solve.

[0003] To address the aforementioned issues, many research papers have examined surface wrinkles in steel wire rods, such as "Analysis and Improvement of Surface Wrinkle Defects in Large-Sized Cold Heading Steel Wire Rods" and "Effect of Plastic Strain Energy Density on Surface Wrinkle Defects in Wire Rods." The results indicate that optimizing the pass profile of some roughing mill passes for specific steel grades can significantly reduce the probability of surface wrinkle defects. Chinese patents with publication numbers CN114951276A and CN117798184A achieve uniform corner deformation during billet rolling by optimizing the roughing pass profile and reduction, thereby eliminating surface wrinkles on the steel. However, in actual industrial production, different steel grades have different high-temperature deformation properties. While personalized optimization of the pass profile based on the characteristics of each steel grade can address the problem of surface wrinkles to a certain extent, it reduces the versatility of the pass profile, requiring companies to frequently replace and customize the roll pass profile, increasing procurement and maintenance costs.

[0004] Furthermore, the current commonly used billet finishing method is to fully grind the intermediate billet or billet, similar to that described in Chinese patents CN112893794A and CN114082904B, with a particular focus on grinding the billet corners to control defects and decarburization. However, in practice, even with meticulously rounded corners using a grinding wheel, cold mechanical grinding inevitably leaves sharp corners at the billet corners. During the subsequent heating and re-rolling process, these corners deform inconsistently with the flat surfaces, increasing the risk of surface wrinkles.

[0005] High-silicon spring steel, due to its high silicon content, has a high resistance to deformation, making it more susceptible to uneven deformation during the rolling and compression process. This makes surface wrinkling on the spring steel even more prominent. How to effectively reduce surface wrinkling on high-silicon spring steel wire has become a key issue that needs to be addressed in the research, development, and production of high-grade spring steel. Summary of the Invention

[0006] To address the shortcomings of the prior art, the present invention provides a production method for reducing surface wrinkles in high-silicon spring steel wire. This method addresses the rolled product itself by maintaining appropriate corner radius at the billet, refining the surface grain of the intermediate billet, and increasing the high-wire rolling temperature. This method improves the rolling deformation capability and reduces deformation non-uniformity, particularly at the corners, thereby reducing surface wrinkles in the high-silicon spring steel wire.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A production method for reducing surface wrinkles of high-silicon spring steel wire rods comprises the following steps: bloom heating, rough rolling, flame cleaning, continuous rolling into intermediate blooms, water cooling, slow cooling, intermediate bloom shot blasting, flaw detection, high-wire heating, and high-wire rough rolling, intermediate rolling, and finishing rolling.

[0009] Furthermore, in the bloom heating step, the bloom is heated to a temperature of 1200±20°C.

[0010] Furthermore, in the rough rolling process, the side length of the initially rolled bloom is 200-260 mm.

[0011] Furthermore, in the flame cleaning process, cracks, slag inclusions and decarburized layers on the surface of the rough-rolled billet are removed, and the cleaning depth on one side is 2-4 mm.

[0012] Furthermore, in the continuous rolling process to form intermediate billets, the flame-cleaned billets enter the continuous rolling process and are rolled into intermediate billets of specific sizes through the continuous rolling pass. The side length of the intermediate billets is 150-240 mm, and the corner fillet radius of the intermediate billets is 10-20 mm.

[0013] Furthermore, in the water cooling process, the red-returning temperature of the intermediate billet surface is controlled to be 650-750°C.

[0014] Furthermore, in the slow cooling process, the slow cooling temperature of the intermediate billet is ≤100°C.

[0015] Furthermore, in the shot blasting and flaw detection process of the intermediate billet, the intermediate billet does not need to be fully surface ground. The oxide scale on its surface is removed by the shot blasting process, and then the intermediate billet is subjected to flaw detection. The defective points are targeted and ground, thereby retaining the rounded corners of the intermediate billet.

[0016] Furthermore, in the high-speed wire heating process, the temperature of the high-temperature section is controlled at 980-1050°C, the time in the furnace is controlled at 80-100 minutes, the residual oxygen content in the high-temperature section is not higher than 3%, and the high-pressure water descaling process is cancelled after the steel is taken out of the furnace to maintain a high rolling temperature.

[0017] Furthermore, in the high-speed wire rough rolling, intermediate rolling and finishing rolling processes, in the rough rolling stage, high-pressure air blowing devices are installed at the outlets of the first and second rolling mills respectively, with the nozzle inclination angle being 10-15°, and the arrangement direction of the nozzle is perpendicular to the compression direction of the rolled piece.

[0018] The process principle of the production method for reducing surface wrinkles of high-silicon spring steel wire rod of the present invention is mainly reflected in the following aspects: (1) by continuously rolling to form an intermediate square billet with suitable corner radius, the deformation uniformity of the corner of the rolled piece during high-wire rolling can be improved; (2) after the high-wire is heated and taken out of the furnace, the high-pressure water descaling process is eliminated, and rough rolling is directly carried out using a higher rolling piece temperature to further improve its deformation uniformity; (3) in terms of decarburization layer control, the surface defects and decarburization layer of the billet are removed by a flame cleaning process, and after the intermediate square billet is rolled, a water-penetrating rapid cooling method is adopted, which not only reduces the formation of the decarburization layer at high temperature, but also refines the surface grains, thereby improving the deformation ability of the billet during subsequent rolling; (4) for the control of iron oxide scale, a method of low-temperature rapid heating in a high-wire heating furnace is adopted to reduce the formation of iron oxide scale, and at the same time, the iron oxide scale is removed with the help of an air sweeping device by utilizing the loose characteristics of the iron oxide scale on the free surface of the rolled piece after compression deformation.

[0019] Compared with the prior art, the present invention has the following positive and beneficial effects:

[0020] The present invention starts from the characteristics of the rolled piece itself, and effectively improves the rolling deformation ability of the rolled piece by retaining the appropriate corner fillet of the square billet, refining the surface grain of the intermediate billet, and increasing the high-wire rolling temperature. It reduces the unevenness of the rolling deformation, especially the unevenness of the corner deformation, thereby greatly reducing the surface wrinkles of the high-silicon spring steel wire and controlling the depth of the surface wrinkles of the high-silicon spring steel wire to within 0.03mm; at the same time, the present invention takes into account the control of the decarburization layer and the iron oxide scale in the production process, and has good versatility. There is no need to carry out personalized modification of the roll pass profile, which reduces the production cost and has high promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a surface defect morphology image of the finished high-silicon spring steel wire produced in Example 1 of the present invention;

[0022] Figure 2 This is a surface defect morphology image of the finished high-silicon spring steel wire produced in Example 2 of the present invention;

[0023] Figure 3 This is a surface defect morphology of the finished high-silicon spring steel wire produced in the comparative example of the present invention. DETAILED DESCRIPTION

[0024] The technical solutions of the present invention are further specifically described below through examples and drawings. These examples are provided for the purpose of illustrating the present invention and are not intended to limit the present invention. All other examples obtained by persons of ordinary skill in the art based on the examples in this application without creative work are intended to fall within the scope of protection of this application.

[0025] Example 1

[0026] A production method for reducing surface wrinkles of high-silicon spring steel wire rods comprises the following steps: bloom heating, rough rolling, flame cleaning, continuous rolling into intermediate blooms, water cooling, slow cooling, intermediate bloom shot blasting, flaw detection, high-wire heating, and high-wire rough rolling, intermediate rolling, and finishing rolling.

[0027] In the bloom heating process, the bloom is heated to 1200±20° C., providing good hot working conditions for subsequent rolling.

[0028] In the rough rolling process, the heated bloom is preliminarily rolled to obtain a bloom with a side length of 200-260 mm;

[0029] In the flame cleaning process, the large square billet after rough rolling needs to be flame cleaned to remove cracks, slag inclusions and other defects on the surface of the large square billet after rough rolling. At the same time, the decarburization layer on the surface of the large square billet after rough rolling is also removed. The cleaning depth is 2mm on one side. If the cleaning depth is too low, the defects and decarburization layer on the surface of the large square billet after rough rolling cannot be completely removed, affecting product quality. If the cleaning depth is too high, the yield rate of spring steel wire will be reduced.

[0030] In the continuous rolling process to form intermediate billets, the flame-cleaned large billet enters the continuous rolling process and is rolled into an intermediate billet of a specific size through a continuous rolling pass. The side length of the intermediate billet is 150 mm. At the same time, the corner fillet radius of the intermediate billet is strictly controlled to be 20 mm. When the corner fillet radius of the intermediate billet is less than 10 mm, the ductility of the corner of the intermediate billet will be reduced during the rolling process, and when the fillet radius is greater than 20 mm, the friction force of the corner of the intermediate billet is too large, which is also not conducive to rolling deformation.

[0031] In the water cooling process, the intermediate billet after continuous rolling needs to be rapidly cooled through water. During this process, the surface red-return temperature of the intermediate billet is accurately controlled at 650°C. If the surface red-return temperature of the intermediate billet is lower than 650°C, abnormal structures such as martensite or bainite are likely to appear on the surface of the intermediate billet. If the surface red-return temperature of the intermediate billet is higher than 750°C, decarburization will continue to form on the surface of the intermediate billet during the subsequent slow cooling process.

[0032] In the slow cooling process, the intermediate billets after water cooling are stacked and slowly cooled, and are sent to the next process after cooling to ≤100°C to eliminate the internal stress of the intermediate billets and prevent the internal stress from affecting the rolling process after subsequent low-temperature short-time heating.

[0033] In the shot blasting and flaw detection process of the intermediate billet, the intermediate billet does not need to be fully surface ground. Only the oxide scale on the surface of the intermediate billet is removed by the shot blasting process, and then the flaw detection is performed, and the defective points are targeted for grinding, so that the rounded corners of the intermediate billet are finally retained.

[0034] In the high-speed wire heating process, the intermediate square billet after shot blasting and flaw detection is fed into the high-speed wire heating furnace, the high-temperature section temperature is set at 1050°C, the furnace time is controlled at 80 minutes, and the residual oxygen content in the high-temperature section is ensured to be no higher than 3%. Before rolling the spring steel, the residual water in the gas pipeline needs to be released to reduce the oxidizing nature of the furnace gas. The low-temperature short-time heating process can effectively reduce the formation of full decarburization and semi-decarburization, avoid the uneven deformation of the ferrite layer and austenite after decarburization at high temperature, and ensure that the depth of the decarburization layer meets the finished product requirements of high-silicon spring steel. After leaving the furnace, the high-pressure water descaling process is eliminated to maintain a high rolling temperature.

[0035] In the high-speed wire rough rolling, intermediate rolling and finishing rolling processes, the intermediate square billet after high-speed wire heating enters the rough rolling mill directly after being discharged from the furnace. In the rough rolling stage, high-pressure air blowing devices are installed at the outlets of the first and second rolling mills respectively. The inclination angle of the nozzle of the high-pressure air blowing device is 10-15°, and the arrangement direction of the nozzle is perpendicular to the compression direction of the rolled piece. For example, when the rolled piece is compressed on both sides, the nozzles are arranged on the upper and lower surfaces of the rolled piece. When the rolled piece is compressed up and down, the nozzles are arranged on both sides. In addition, in order to ensure the surface quality of the intermediate square billet, the amount of steel over the rolling groove for rough rolling, intermediate rolling and finishing rolling shall not exceed 2500t, 1000t and 500t respectively, to prevent the rolling groove surface from aging and roughening due to excessive use, thereby affecting the deformation effect of the rolled piece.

[0036] After all the above processes, the finished high silicon spring steel wire is obtained. The surface defect morphology of the high silicon spring steel wire is as shown in the figure. Figure 1 As shown. Figure 1It can be seen that the maximum depth of the wrinkles on the surface of the high-silicon spring steel wire is 0.02mm, which is far lower than the requirement that the surface defects of high-stress springs should not exceed 0.05mm. The wrinkles will not affect the fatigue life of the final high-silicon spring steel wire after subsequent drawing and extension.

[0037] Example 2

[0038] A production method for reducing surface wrinkles of high-silicon spring steel wire rods comprises the following steps: bloom heating, rough rolling, flame cleaning, continuous rolling into intermediate blooms, water cooling, slow cooling, intermediate bloom shot blasting, flaw detection, high-wire heating, and high-wire rough rolling, intermediate rolling, and finishing rolling.

[0039] In the bloom heating process, the bloom is heated to 1200±20° C., providing good hot working conditions for subsequent rolling.

[0040] In the rough rolling process, the heated bloom is preliminarily rolled to obtain a bloom with a side length of 200-260 mm;

[0041] In the flame cleaning process, the large square billet after rough rolling needs to be flame cleaned to remove cracks, slag inclusions and other defects on the surface of the large square billet after rough rolling. At the same time, the decarburization layer on the surface of the large square billet after rough rolling is also removed. The cleaning depth is 4mm on one side. If the cleaning depth is too low, the defects and decarburization layer on the surface of the large square billet after rough rolling cannot be completely removed, affecting product quality. If the cleaning depth is too high, the yield rate of spring steel wire will be reduced.

[0042] In the continuous rolling process to form intermediate billets, the flame-cleaned large billet enters the continuous rolling process and is rolled into an intermediate billet of a specific size through a continuous rolling pass. The side length of the intermediate billet is 240 mm. At the same time, the corner fillet radius of the intermediate billet is strictly controlled to be 10 mm. When the corner fillet radius of the intermediate billet is less than 10 mm, the ductility of the corner of the intermediate billet will be reduced during the rolling process, and when the fillet radius is greater than 20 mm, the friction force of the corner of the intermediate billet is too large, which is also not conducive to rolling deformation.

[0043] In the water cooling process, the intermediate billet after continuous rolling needs to be rapidly cooled by water. During this process, the surface red-return temperature of the intermediate billet is accurately controlled at 750°C. If the surface red-return temperature of the intermediate billet is lower than 650°C, abnormal structures such as martensite or bainite are likely to appear on the surface of the intermediate billet. If the surface red-return temperature of the intermediate billet is higher than 750°C, decarburization will continue to form on the surface of the intermediate billet during the subsequent slow cooling process.

[0044] In the slow cooling process, the intermediate billets after water cooling are stacked and slowly cooled, and are sent to the next process after cooling to ≤100°C to eliminate the internal stress of the intermediate billets and prevent the internal stress from affecting the rolling process after subsequent low-temperature short-time heating.

[0045] In the shot blasting and flaw detection process of the intermediate billet, the intermediate billet does not need to be fully surface ground. Only the oxide scale on the surface of the intermediate billet is removed by the shot blasting process, and then the flaw detection is performed, and the defective points are targeted for grinding, so that the rounded corners of the intermediate billet are finally retained.

[0046] In the high-speed wire heating process, the intermediate square billet after shot blasting and flaw detection is fed into the high-speed wire heating furnace, the high-temperature section temperature is set at 980°C, the furnace time is controlled at 100 minutes, and the residual oxygen content in the high-temperature section is ensured to be no higher than 3%. Before rolling the spring steel, the residual water in the gas pipeline needs to be released to reduce the oxidizing nature of the furnace gas. The low-temperature short-time heating process can effectively reduce the formation of full decarburization and semi-decarburization, avoid the uneven deformation of the ferrite layer and austenite after decarburization at high temperature, and ensure that the depth of the decarburization layer meets the finished product requirements of high-silicon spring steel. After leaving the furnace, the high-pressure water descaling process is eliminated to maintain a high rolling temperature.

[0047] In the high-speed wire rough rolling, intermediate rolling and finishing rolling processes, the intermediate square billet after high-speed wire heating enters the rough rolling mill directly after being discharged from the furnace. In the rough rolling stage, high-pressure air blowing devices are installed at the outlets of the first and second rolling mills respectively. The inclination angle of the nozzle of the high-pressure air blowing device is 10-15°, and the arrangement direction of the nozzle is perpendicular to the compression direction of the rolled piece. For example, when the rolled piece is compressed on both sides, the nozzles are arranged on the upper and lower surfaces of the rolled piece. When the rolled piece is compressed up and down, the nozzles are arranged on both sides. In addition, in order to ensure the surface quality of the intermediate square billet, the amount of steel over the rolling groove for rough rolling, intermediate rolling and finishing rolling shall not exceed 2500t, 1000t and 500t respectively, to prevent the rolling groove surface from aging and roughening due to excessive use, thereby affecting the deformation effect of the rolled piece.

[0048] After all the above processes, the finished high silicon spring steel wire is obtained. The surface defect morphology of the high silicon spring steel wire is as shown in the figure. Figure 2 As shown. Figure 2 It can be seen that the maximum depth of the wrinkles on the surface of the high-silicon spring steel wire is 0.023mm, which is far lower than the requirement that the surface defects of high-stress springs should not exceed 0.05mm. The wrinkles will not affect the fatigue life of the final high-silicon spring steel wire after subsequent drawing and extension.

[0049] Comparative Example

[0050] A production method for reducing surface wrinkles of high-silicon spring steel wire rods comprises the following steps: bloom heating, rough rolling, continuous rolling into intermediate blooms, slow cooling, full grinding of the intermediate blooms, flaw detection, high-wire heating, high-pressure water descaling, and high-wire rough rolling, intermediate rolling, and finishing rolling.

[0051] In the bloom heating process, the bloom is heated to a suitable temperature to provide good hot working conditions for subsequent rolling.

[0052] In the rough rolling process, the heated bloom is preliminarily rolled to give it a certain shape and size.

[0053] In the continuous rolling process to form intermediate billets, the large billets after rough rolling do not need a flame cleaning process and directly enter the continuous rolling process to be rolled into intermediate billets of a specific size through the continuous rolling pass. The side length of the intermediate billet is 150 mm.

[0054] In the slow cooling process, after continuous rolling into intermediate billets, the billets are stacked and slowly cooled, and are sent to the next process after being cooled to ≤200°C.

[0055] In the process of full grinding and flaw detection of the intermediate billet, in order to remove the decarburized layer, the surface of the intermediate billet is fully ground with a grinding wheel to a grinding depth of 1-3 mm, including corner grinding. There will inevitably be sharp corners. After flaw detection, qualified ones are sent to the next process.

[0056] In the high-speed wire heating process, in order to control decarburization, a low-temperature rapid heating process is adopted. The intermediate square billet after full grinding and flaw detection is sent to the high-speed wire heating furnace. The temperature of the high-temperature section is set at 1020°C, and the time in the furnace is controlled at 100 minutes. At the same time, it is ensured that the residual oxygen content in the high-temperature section is not higher than 3%.

[0057] In the high-pressure water descaling process, the intermediate billet is stripped of oxidized iron scale by rapid cooling after it is taken out of the furnace. The high-pressure water descaling pressure is not less than 15 MPa, and the billet surface temperature drops to 80-130°C.

[0058] In the high-wire rough rolling, intermediate rolling and finishing rolling process, the intermediate billet is descaled by high-pressure water and then goes through rough rolling, intermediate rolling and finishing rolling to become the final high-silicon spring steel wire.

[0059] After all the above processes, the finished high silicon spring steel wire is obtained. The surface defect morphology of the high silicon spring steel wire is as shown in the figure. Figure 3 As shown. Figure 3It can be seen that the maximum depth of the wrinkles on the surface of the high-silicon spring steel wire is 0.07mm, which exceeds the requirement that the surface defects of high-stress springs should not exceed 0.05mm. This is because the process in this comparative example mainly forms sharp corners at the corners while removing defects and decarburization layers through full peeling of the steel billet. After the high-wire is heated and taken out of the furnace, high-pressure water is used to remove the oxidized iron scale while the temperature of the rolled piece is further reduced. Subsequently, the steel billet with sharp corners deforms unevenly at the corners during low-temperature rolling deformation, forming wrinkles of varying depths, which are eventually left on the finished steel.

[0060] In summary, the present invention starts from the characteristics of the spring steel rolled piece itself, and effectively improves the rolling deformation ability of the spring steel rolled piece by retaining the appropriate corner fillet of the square billet, refining the surface grain of the intermediate billet, and increasing the high-wire rolling temperature. It also reduces the unevenness of the rolling deformation of the spring steel, especially the unevenness of the corner deformation, thereby greatly reducing the surface wrinkles of the high-silicon spring steel wire and controlling the depth of the surface wrinkles of the high-silicon spring steel wire within 0.03mm; at the same time, the present invention takes into account the control of the decarburization layer and the iron oxide scale in the production process, and has good versatility, does not require personalized modification of the roll pass profile, reduces production costs, and has high promotion and application value.

[0061] Finally, it should be noted that although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that all equivalent changes and improvements made within the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A production method for reducing surface wrinkles of high silicon spring steel wire, characterized in that: It includes the large square billet heating process, rough rolling process, flame cleaning process, continuous rolling into intermediate square billet process, water cooling process, slow cooling process, intermediate square billet shot blasting, flaw detection process, high-speed wire heating process and high-speed wire rough rolling, intermediate rolling and finishing rolling processes.

2. A production method for reducing surface wrinkles of high silicon spring steel wire according to claim 1, characterized in that: In the bloom heating step, the bloom is heated to a temperature of 1200±20°C.

3. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the rough rolling process, the side length of the bloom initially rolled is 200-260 mm.

4. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the flame cleaning process, cracks, slag inclusions and decarburized layers on the surface of the rough-rolled billet are removed, and the cleaning depth per side is 2-4 mm.

5. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the continuous rolling process to form intermediate billets, the flame-cleaned billets enter the continuous rolling process and are rolled into intermediate billets of specific sizes through the continuous rolling pass. The side length of the intermediate billets is 150-240 mm, and the corner fillet radius of the intermediate billets is 10-20 mm.

6. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the water cooling process, the surface red-return temperature of the intermediate billet is controlled to be 650-750°C.

7. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the slow cooling process, the slow cooling temperature of the intermediate billet is ≤100°C.

8. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the shot blasting and flaw detection process of the intermediate billet, the intermediate billet does not need to be fully ground on the surface. The oxide scale on the surface is removed by the shot blasting process, and then the intermediate billet is flaw-detected and the defective points are targeted for grinding, thereby retaining the rounded corners of the intermediate billet.

9. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the high-speed wire heating process, the temperature of the high-temperature section is controlled at 980-1050° C., the time in the furnace is controlled at 80-100 minutes, and the residual oxygen content in the high-temperature section is not higher than 3%.

10. The method for reducing surface wrinkles of a high-silicon spring steel wire according to claim 1, characterized in that: In the high-speed wire rough rolling, intermediate rolling and finishing rolling processes, in the rough rolling stage, high-pressure air blowing devices are installed at the outlets of the first and second rolling mills respectively, with the nozzle inclination angle of 10-15°, and the arrangement direction of the nozzle is perpendicular to the compression direction of the rolled piece.

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