High-strength corrosion-resistant zinc-aluminum alloy steel wire and production process thereof

Abstract

This invention relates to the field of steel wire production technology, specifically to high-strength, corrosion-resistant zinc-aluminum alloy steel wire and its production process. The invention includes a steel wire body with a pressure closing groove on its surface and a pressure retention groove at its center. Both the pressure closing groove and the pressure retention groove are arranged along the length of the steel wire body, and the pressure retention groove communicates with the outer surface of the steel wire body through the pressure closing groove. In this invention, the zinc-aluminum alloy steel wire can, during the twisting and compaction of the strands into a steel wire rope, keep the pressure closing groove closed while maintaining the flow in the pressure retention groove. Applying positive pressure oil to only one end is sufficient to lubricate the entire steel wire rope.

Description

Technical Field

[0001] This invention relates to the field of steel wire production technology, specifically to high-strength corrosion-resistant zinc-aluminum alloy steel wire and its production process. Background Technology

[0002] Zinc-aluminum alloy steel wire is a corrosion-resistant steel wire coated with a zinc-aluminum alloy layer through a hot-dip galvanizing process. It is often used to twist and compact multiple strands of zinc-aluminum alloy steel wire to make steel wire rope. When multiple strands of zinc-aluminum alloy steel wire are twisted and compacted to make steel wire rope, the steel wires are highly compacted under pressure. As a result, the internal steel wires of the steel wire rope are difficult to lubricate fully. During the bending process, the friction between the internal steel wires causes the coating to wear off quickly, affecting its corrosion resistance. Furthermore, in subsequent lubrication and maintenance, the entire steel wire rope can only be manually coated to complete the external surface lubrication, which is extremely inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide high-strength, corrosion-resistant zinc-aluminum alloy steel wire and its production process, so as to solve the problem mentioned in the background art that the internal steel wires of the zinc-aluminum alloy steel wire are difficult to be fully lubricated after being made into steel wire ropes, and the subsequent lubrication and maintenance are inconvenient.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-strength corrosion-resistant zinc-aluminum alloy steel wire, comprising a steel wire body, wherein a pressure closing groove is formed on the surface of the steel wire body, and a pressure retention groove is formed at the center of the steel wire body. Both the pressure closing groove and the pressure retention groove are arranged along the length direction of the steel wire body, and the pressure retention groove is connected to the outer surface of the steel wire body through the pressure closing groove; when the steel wire body is subjected to radial extrusion force, the pressure closing groove closes and comes together.

[0005] The production process of high-strength, corrosion-resistant zinc-aluminum alloy steel wire includes the following steps: Step 1, pretreatment: Immerse the wire rod in a hydrochloric acid bath to remove surface iron oxide scale and rust through chemical reaction; after pickling, coat with a borax coating, which plays a role in lubrication, friction reduction and preventing high-temperature oxidation of the steel substrate during subsequent drawing and heat treatment. Step two, drawing, the drawing process includes drawing die, second-stage drawing die, third-stage drawing die and die frame mechanism; In the first stage, the wire rod is gradually drawn to the diameter of the finished steel wire by using progressively smaller drawing dies to form the steel wire body; In the second stage, several sets of second-stage drawing dies are used to draw pressure-closed grooves on the surface of the steel wire body. In the third stage, several sets of three-stage drawing dies are used to draw the steel wire inside the body through the pressure closing groove to form a pressure retention groove. The drawing die, the second-stage drawing die, and the third-stage drawing die are all individually installed on the die frame mechanism, and the drawing powder is applied through the die frame mechanism during the drawing process; Step 3, heat treatment: heat the steel wire body obtained in Step 2 with natural gas combustion to the austenitizing temperature, so that the pearlite structure is completely transformed into austenite; depending on different production standards, lead bath or water bath quenching treatment is selected. Step 4, pickling: The heat-treated steel wire body is continuously immersed in a hydrochloric acid pickling tank to remove the surface oxide layer through chemical reaction. After pickling, it is rinsed with clean water to remove residual hydrochloric acid and iron salts. Step 5, fluxing: Immerse the pickled and rinsed steel wire body into the fluxing solution tank, and evenly coat it with fluxing solution. The fluxing solution forms a thin and continuous salt film on the surface of the steel wire body, isolating the air from the steel substrate. The coated steel wire body is heated to 100-150℃ in a hot air drying oven to quickly evaporate the surface moisture. Step 6: Hot-dip galvanizing. The zinc pot is heated with natural gas, and zinc ingots and an appropriate amount of aluminum powder are melted into a molten zinc-aluminum liquid at 445-465℃. The dried steel wire body is continuously immersed in the molten zinc-aluminum liquid to form a coating on the surface of the steel wire body. In the molten zinc-aluminum liquid, zinc, aluminum and iron undergo an alloying reaction, and finally a zinc-aluminum alloy layer is formed in the coating to obtain zinc-aluminum alloy steel wire. The zinc-aluminum alloy steel wire is then passed through a cooling water tank, where the rapid cooling effect of the water causes the zinc-aluminum alloy layer to solidify quickly from a molten state. Step 7, Wiping: First, a pressure swing adsorption nitrogen generator is used to separate nitrogen gas with a purity of ≥99% from the air. The surface of the cooled zinc-aluminum alloy steel wire is then blown off with a high-pressure nitrogen nozzle to remove the attached zinc-aluminum dust. The inert protection of nitrogen gas is used to prevent the high-temperature zinc-aluminum layer from oxidizing again. Step 8: The finished zinc-aluminum alloy steel wire, which has been wiped with nitrogen, is continuously wound into a coil or roll using a winding machine.

[0006] The second-stage drawing die is provided with a drawing hole, and a closed groove extrusion part is fixedly provided in the drawing hole. When the steel wire body is drawn through the second-stage drawing die, the steel wire body passes through the drawing hole, so that the closed groove extrusion part extrudes the surface of the steel wire body, thereby forming a pressure closed groove; the length of the closed groove extrusion part in several sets of second-stage drawing dies increases step by step.

[0007] The difference between the three-stage drawing die and the two-stage drawing die is that, based on the two-stage drawing die, a retaining groove extrusion section is added to the surface of the closed groove extrusion section.

[0008] The mold frame mechanism includes a mold holder and a wire drawing powder hopper fixedly installed in the mold holder. The wire drawing die, second-stage drawing die, or third-stage drawing die is set in the mold holder. The steel wire body first passes through the wire drawing powder hopper and then through the wire drawing die, second-stage drawing die, or third-stage drawing die in the mold holder. An outer slide is fixedly installed on the surface of the mold holder. A support slide shaft is inserted inside the outer slide. A drawing spring is sleeved on the outside of the support slide shaft. The drawing spring applies pressure to the outer slide in the opposite direction to the movement of the steel wire body. A variable displacement clamp is set inside the wire drawing powder hopper. The variable displacement clamp is a plate-shaped structure and is symmetrically arranged on both sides inside the wire drawing powder hopper. The wire drawing powder is filled between the two variable displacement clamps. The variable displacement clamps have a tendency to move closer to each other. When the drawing resistance of the steel wire body increases, causing the drawing spring to be compressed, the variable displacement clamp vibrates.

[0009] A clamping shaft is fixedly installed on the surface of the variable-capacity clamping plate. The clamping shaft passes through the side wall of the drawing powder hopper and extends to the outside of the drawing powder hopper. A synchronous back plate is fixedly installed at the end of the clamping shaft. A tension spring is connected between the synchronous back plate and the outer surface of the drawing powder hopper. The tension spring provides elastic tension, so that the two variable-capacity clamping plates have a tendency to move closer to each other. A transverse sliding plate is fixedly installed on the synchronous back plate. A sliding plate retainer is fixedly installed at the bottom of the drawing powder hopper. The transverse sliding plate is limited and installed in the sliding plate retainer.

[0010] A hammer seat is fixedly installed on the surface of the transverse sliding plate. A positioning shaft is fixedly installed between the hammer seat and the synchronous back plate. A hammer block is sleeved on the outside of the positioning shaft. A compression spring is installed on one side of the hammer block, and a dial wheel is installed on the other side of the hammer block. When the pulling resistance of the steel wire body increases, causing the pulling spring to be compressed, the dial wheel can rotate, which moves the hammer block to hammer the hammer seat, causing the two variable displacement clamps to impact and vibrate in the direction of moving closer to each other.

[0011] The rotation limiter of the dial wheel is set in the hammer seat. The surface of the hammer seat is also fixedly set with a bevel gear fixing frame. The bevel gear fixing frame is rotatably installed with a first bevel gear and a second bevel gear. The dial wheel and the first bevel gear are coaxially driven and installed. The first bevel gear and the second bevel gear mesh with each other. A sleeve shaft is coaxially fixed on the second bevel gear. The second bevel gear is rotatably limited in the bevel gear fixing frame through the sleeve shaft. A square rod shaft is inserted in the sleeve shaft. The square rod shaft can move axially relative to the sleeve shaft. When the square rod shaft rotates, it can drive the sleeve shaft to rotate. A support frame is fixedly set on the outside of the mold holder. The support frame provides positioning support for the square rod shaft.

[0012] One-way ratchet components are fixedly installed at both ends of the square rod shaft. A driven pulley is installed outside the one-way ratchet component. The one-way ratchet component has a one-way transmission function. The driven pulley drives the one-way ratchet component to rotate only when it rotates in one of the rotation directions. A drive pulley is installed outside the driven pulley. A synchronous belt is installed between the drive pulley and the driven pulley for transmission.

[0013] The surface of the supporting slide shaft is provided with toothed grooves, and a slide gear is rotatably arranged in the outer slide. The slide gear and the toothed grooves mesh with each other. When the pulling resistance of the steel wire body increases, causing the pulling spring to be compressed, the outer slide moves along the axial direction of the supporting slide shaft, so that the toothed groove drives the slide gear to rotate. The slide gear is coaxially installed with the drive pulley.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention enables the zinc-aluminum alloy steel wire to be twisted and compacted into a wire rope, ensuring that the pressure closing groove is closed while the pressure retention groove remains open. This allows the resulting wire rope to be lubricated along its axial direction. The oil flows continuously through the pressure retention groove throughout the entire rope. When the wire rope is subjected to bending, vibration, or other influences, the oil can seep out through the pressure closing groove to the surface of each wire. Applying positive pressure oil at only one end is sufficient to lubricate the entire wire rope, making maintenance more convenient. It also significantly reduces dry friction between the wires inside the wire rope, resulting in a more durable coating, improved corrosion resistance, and enhanced heat dissipation.

[0015] The present invention relates to a production process for high-strength, corrosion-resistant zinc-aluminum alloy steel wire. By using a two-stage and a three-stage drawing die, steel wire with pressure closing grooves and pressure retention grooves can be efficiently produced during the drawing process, overcoming production difficulties.

[0016] The mold frame mechanism in this invention can automatically detect and adjust the state of the drawing powder when the powder is applied unevenly or incompletely, automatically break the powder arching, make the powder accumulation more uniform, reduce the gaps caused by the arch structure, reduce the frequency of manual maintenance, and reduce the probability of wire breakage. Attached Figure Description

[0017] Figure 1 This is a flowchart of the production process of the present invention.

[0018] Figure 2 This is a schematic diagram of the zinc-aluminum alloy steel wire structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the cross-section of the zinc-aluminum alloy steel wire of the present invention.

[0020] Figure 4 This is a schematic diagram of the second-order drawing die structure of the present invention.

[0021] Figure 5 This is a three-dimensional cross-sectional schematic diagram of the second-order drawing die of the present invention.

[0022] Figure 6 This is a partial three-dimensional cross-sectional view of the second-order drawing die of the present invention.

[0023] Figure 7 This is a schematic diagram of the three-stage drawing die structure of the present invention.

[0024] Figure 8 This is a three-dimensional cross-sectional schematic diagram of the three-stage drawing die of the present invention.

[0025] Figure 9 This is a partial three-dimensional cross-sectional view of the three-stage drawing die of the present invention.

[0026] Figure 10 This is a schematic diagram of the mold frame mechanism of the present invention.

[0027] Figure 11 This is a schematic diagram of the bottom angle of the mold frame mechanism of the present invention.

[0028] Figure 12 This is a partial schematic diagram of the bottom angle of the mold frame mechanism of the present invention.

[0029] Figure 13 This is a three-dimensional half-section schematic diagram of the powder drawing compartment of the mold frame mechanism of the present invention.

[0030] Figure 14 This is a three-dimensional half-section front view of the powder drawing chamber of the mold frame mechanism of the present invention.

[0031] Figure 15 This is a three-dimensional half-sectional view of the support slide shaft of the mold frame mechanism of the present invention.

[0032] Figure 16 This is an exploded view of the mold frame mechanism of the present invention.

[0033] Figure 17 This is a schematic diagram of the components of the mold frame mechanism of the present invention.

[0034] In the diagram: 1. Steel wire body; 101. Pressure closing groove; 102. Pressure retention groove; 2. Second-stage drawing die; 3. Third-stage drawing die; 201. Drawing hole; 202. Closing groove extrusion section; 301. Retention groove extrusion section; 4. Die holder; 5. Wire drawing powder hopper; 6. Outer slide; 7. Support slide shaft; 8. Drawing spring; 9. Variable displacement clamp; 901. Clamp shaft; 902. Synchronous back plate; 903. Tension spring; 904. Lateral slide plate; 905. Slide plate retainer; 906. Hammering. 907. Seat; 908. Positioning shaft; 909. Hammering block; 910. Compression spring; 911. Dial wheel; 912. Bevel tooth fixing bracket; 913. First bevel tooth; 914. Sleeve shaft; 915. Square rod shaft; 916. Support shaft bracket; 917. One-way ratchet component; 918. Driven pulley; 919. Drive pulley; 920. Synchronous belt; 921. Slide gear; 922. Tooth groove; 501. Compartment cover; 701. Mold frame fixing plate; 702. Fixing hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0036] Please see Figures 1 to 17 This invention provides a technical solution: high-strength, corrosion-resistant zinc-aluminum alloy steel wire, such as... Figure 2 and Figure 3 As shown, the device includes a steel wire body 1. A pressure closing groove 101 is formed on the surface of the steel wire body 1, and a pressure retention groove 102 is formed at the center of the steel wire body 1. In this embodiment of the invention, the cross-section of the pressure retention groove 102 is circular. Both the pressure closing groove 101 and the pressure retention groove 102 are arranged along the length direction of the steel wire body 1. The pressure retention groove 102 is connected to the outer surface of the steel wire body 1 through the pressure closing groove 101. When the steel wire body 1 is subjected to radial extrusion force, the pressure closing groove 101 closes and comes together, while the pressure retention groove 102 can remain in existence within a suitable pressure range to allow oil to flow.

[0037] The production process of high-strength, corrosion-resistant zinc-aluminum alloy steel wire: The aforementioned high-strength, corrosion-resistant zinc-aluminum alloy steel wire is produced using this process, such as... Figure 1 As shown, the steps include: Step 1, pretreatment: Immerse the wire rod in a hydrochloric acid bath to remove surface iron oxide scale and rust through chemical reaction. The mass fraction of hydrochloric acid is 15%~25%, and the temperature is 40~60℃. After pickling, apply a borax coating. The borax coating can be applied by electrostatic spraying to form a uniform borax coating on the surface. The borax coating acts as a solid lubricant during subsequent drawing, reducing the friction coefficient between the die and the wire, and reducing surface scratches and die wear. Under the high temperature environment of heat treatment, the borax melts to form a glassy protective film, which isolates the air and prevents the steel substrate from oxidizing again, while inhibiting grain boundary oxidation embrittlement. Step two, drawing, includes a drawing die, a second-stage drawing die 2, a third-stage drawing die 3, and a die frame mechanism. In the first stage, the wire rod is gradually drawn to the finished wire diameter through 6-12 consecutive drawing passes using progressively smaller drawing dies, forming the wire body 1. In the second stage, several sets of second-stage drawing dies 2 are used to draw pressure closing grooves 101 on the surface of the wire body 1. In the third stage, several sets of third-stage drawing dies 3 are used to draw pressure closing grooves 101 onto the wire. The internal drawing of the main body 1 forms a pressure retention groove 102; the second-stage drawing die 2 is provided with a drawing hole 201, and a closed groove extrusion part 202 is fixedly provided in the drawing hole 201. When the steel wire body 1 is drawn through the second-stage drawing die 2, the steel wire body 1 passes through the drawing hole 201, so that the closed groove extrusion part 202 extrudes the surface of the steel wire body 1, thereby forming a pressure closed groove 101; the length of the closed groove extrusion part 202 in several sets of second-stage drawing dies 2 increases step by step.

[0038] The difference between the three-stage drawing die 3 and the two-stage drawing die 2 is that, based on the two-stage drawing die 2, a retaining groove extrusion section 301 is added to the surface of the closed groove extrusion section 202.

[0039] The wire drawing die, the second-stage drawing die 2, and the third-stage drawing die 3 are all individually installed on the die frame mechanism. The drawing powder is applied through the die frame mechanism during the drawing process. The die frame mechanism includes a die holder 4 and a drawing powder hopper 5 fixedly installed with the die holder 4. The wire drawing die, the second-stage drawing die 2, or the third-stage drawing die 3 is set in the die holder 4. The steel wire body 1 first passes through the drawing powder hopper 5 and then passes through the wire drawing die, the second-stage drawing die 2, or the third-stage drawing die 3 in the die holder 4. An outer slide block 6 is welded and fixed to the surface of the mold holder 4, and a supporting slide shaft 7 is inserted inside the outer slide block 6, such as... Figure 15 As shown, a mold frame fixing plate 701 is welded to the end of the supporting slide shaft 7. A fixing hole 702 is provided through the mold frame fixing plate 701. The mold frame mechanism of the present invention is installed and fixed to the external base by bolts and fixing holes 702. A pull spring 8 is sleeved on the outside of the supporting slide shaft 7. The pull spring 8 applies pressure to the outer slide block 6 in the opposite direction to the movement of the wire body 1. A variable displacement clamp 9 is installed inside the wire drawing powder hopper 5. The variable displacement clamp 9 is a plate-like structure, symmetrically arranged on both sides of the inside of the wire drawing powder hopper 5. Wire drawing powder is filled between the two variable displacement clamps 9, which have a tendency to move closer together. When the pulling resistance of the wire body 1 increases, causing the pull spring 8 to be compressed, the variable displacement clamp 9 vibrates. By controlling the elastic force of the pull spring 8, during the wire drawing process, when the wire drawing powder adheres evenly and sufficiently and the resistance is low, the elastic force of the pull spring 8 is greater than the resistance. Conversely, when the wire drawing powder adhesion is insufficient and the pulling resistance increases, the elastic force of the pull spring 8 is less than the resistance. Figure 15As shown, a cover 501 is detachably installed on the upper part of the drawing powder hopper 5, in conjunction with a reference. Figure 13 As shown, the drawing powder is filled between two variable displacement plates 9, and the upper part is sealed by the cover 501.

[0040] like Figure 13 As shown, a clamping shaft 901 is welded and fixedly installed on the surface of the variable displacement clamping plate 9. The clamping shaft 901 passes through the side wall of the drawing powder hopper 5 and extends to the outside of the drawing powder hopper 5. A synchronous back plate 902 is welded and fixedly installed at the end of the clamping shaft 901. A tension spring 903 is connected between the synchronous back plate 902 and the outer surface of the drawing powder hopper 5. The tension spring 903 provides elastic tension, so that the two variable displacement clamping plates 9 have a tendency to move closer to each other. A transverse sliding plate 904 is fixedly installed on the synchronous back plate 902. A sliding plate retainer 905 is fixedly installed at the bottom of the drawing powder hopper 5. The transverse sliding plate 904 is slidably limited and installed in the sliding plate retainer 905.

[0041] like Figure 12 As shown, a hammer seat 906 is fixedly mounted on the surface of the transverse slide plate 904. A positioning shaft 907 is fixedly mounted between the hammer seat 906 and the synchronization back plate 902. A hammer block 908 is sleeved on the outside of the positioning shaft 907. A compression spring 909 is provided on one side of the hammer block 908, and a dial wheel 910 is provided on the other side of the hammer block 908. Figure 14 As shown, the surface of the dial 910 is provided with multiple protruding teeth, which can intermittently move the hammer block 908 during the rotation of the dial 910.

[0042] When the pulling resistance of the wire body 1 increases, causing the pulling spring 8 to be compressed, the dial wheel 910 can rotate, which will cause the hammer block 908 to strike the hammer seat 906, causing the two variable displacement clamps 9 to impact and vibrate in the direction of mutual contact.

[0043] The rotation limit of the dial 910 is set in the hammer base 906. The surface of the hammer base 906 is also fixedly provided with a bevel gear fixing frame 911. The first bevel gear 912 and the second bevel gear 913 are rotatably installed in the bevel gear fixing frame 911. The dial 910 and the first bevel gear 912 are coaxially driven and installed. The first bevel gear 912 and the second bevel gear 913 mesh with each other. The sleeve shaft 914 is coaxially fixed on the second bevel gear 913. The second bevel gear 913 is rotatably limited in the bevel gear fixing frame 911 through the sleeve shaft 914. The square rod shaft 915 is inserted in the sleeve shaft 914. The square rod shaft 915 can move axially relative to the sleeve shaft 914. When the square rod shaft 915 rotates, it can drive the sleeve shaft 914 to rotate. The mold holder 4 is externally fixedly provided with a support frame 916. The support frame 916 provides positioning support for the square rod shaft 915.

[0044] One-way ratchet components 917 are fixedly installed at both ends of the square shaft 915. A driven pulley 918 is installed outside each one-way ratchet component 917. The one-way ratchet component 917 has a one-way transmission function; the driven pulley 918 drives the one-way ratchet component 917 to rotate only in one of the rotational directions. The one-way ratchet component 917 is a conventional one-way ratchet structure, which will not be described further in this invention. A drive pulley 919 is installed outside the driven pulley 918, and a synchronous belt 920 is installed between the drive pulley 919 and the driven pulley 918 for transmission.

[0045] The surface of the supporting slide shaft 7 is provided with toothed grooves 922, and a slide gear 921 is rotatably arranged in the outer slide 6. The slide gear 921 and the toothed grooves 922 mesh with each other. When the pulling resistance of the steel wire body 1 increases, causing the pulling spring 8 to be compressed, the outer slide 6 moves axially along the supporting slide shaft 7, so that the toothed grooves 922 drive the slide gear 921 to rotate. The slide gear 921 is coaxially installed with the drive pulley 919.

[0046] Step 3, heat treatment: The steel wire obtained in Step 2 is heated to an austenitizing temperature of 1 to 800-900℃ using natural gas combustion, and held for 30 seconds to completely transform the pearlite structure into austenite and eliminate work hardening. Depending on different production standards, lead bath or water bath quenching is selected. In lead bath quenching, the austenitized steel wire is rapidly immersed in a molten lead bath at 450-550℃ and held isothermally for 15 seconds to complete the transformation from pearlite to sorbite, obtaining a fine-grained, uniformly distributed sorbite structure, and the tensile strength can be increased to 1500MPa. In water bath quenching, the austenitized steel wire is immersed in a 70℃ supersaturated hot water bath, and a similar isothermal transformation is achieved through rapid cooling, avoiding lead contamination. This method is suitable for scenarios with strict environmental protection requirements, and the mechanical properties are slightly lower than those of lead bath quenching but meet the needs of most applications.

[0047] Step 4, pickling: Immerse the heat-treated steel wire body 1 continuously in a pickling tank with a mass fraction of 10%~20% hydrochloric acid, control the temperature range between 30~50℃, and immerse for 5 minutes to remove the high-temperature oxide scale on the surface. After pickling, rinse with 3 stages of countercurrent clean water to thoroughly remove residual hydrochloric acid and iron salts. In the final rinsing stage, a weak alkaline neutralizing agent can be added to adjust the pH of the steel wire surface to between 7 and 8 to avoid residual acid from causing the subsequent fluxing solution to fail.

[0048] Step 5, fluxing: Immerse the steel wire body 1, after pickling and rinsing, into the fluxing solution tank and evenly coat it with the fluxing solution. The main components of the fluxing solution are a mixed solution of zinc chloride and ammonium chloride in a mass ratio of 1:1. The temperature range is 50~70℃, and the immersion time is 3~5s. The fluxing solution forms a thin and continuous salt film on the surface of the steel wire body 1, which isolates the air from the steel substrate and prevents the active surface from oxidizing again after pickling. At the same time, during hot-dip galvanizing, the chloride salt film decomposes to produce hydrogen chloride and ammonia, which clean the surface of the steel wire and assist in wetting the zinc and aluminum solution, inhibiting excessive iron-zinc reaction.

[0049] The coated steel wire body 1 is heated to 100-150℃ in a hot air drying oven to quickly evaporate the surface moisture.

[0050] Step Six: Hot-dip galvanizing. A zinc pot is heated with natural gas, and zinc ingots and an appropriate amount of aluminum powder are melted into a molten zinc-aluminum solution at 445-465℃. The addition of aluminum significantly improves the corrosion resistance of the coating, inhibits zinc dross formation, and improves the fluidity of the zinc-aluminum solution. The dried steel wire body 1 is continuously immersed in the zinc-aluminum solution, forming a coating on its surface. In the molten zinc-aluminum solution, zinc, aluminum, and iron undergo an alloying reaction, ultimately forming a zinc-aluminum alloy layer in the coating, resulting in a zinc-aluminum alloy steel wire. The zinc-aluminum alloy steel wire is then passed through a cooling water tank, where the rapid cooling effect of water causes the zinc-aluminum alloy layer to solidify quickly from its molten state.

[0051] Step 7, Wiping: First, a pressure swing adsorption nitrogen generator is used to separate nitrogen gas with a purity of ≥99% from the air. The surface of the cooled zinc-aluminum alloy steel wire is then blown off with a high-pressure nitrogen nozzle to remove the attached zinc-aluminum dust. The inert protection of nitrogen gas is used to prevent the high-temperature zinc-aluminum layer from oxidizing again. Step 8: The finished zinc-aluminum alloy steel wire, which has been wiped with nitrogen, is continuously wound into a coil or roll using a winding machine.

[0052] The zinc-aluminum alloy steel wire of this invention, such as Figure 2 and Figure 3 As shown, when multiple strands of zinc-aluminum alloy steel wires are twisted and compacted to form a steel wire rope, the pressure closing groove 101 can close together under radial pressure during the compaction process, while the pressure retention groove 102 remains intact through structural design. After the multiple strands of zinc-aluminum alloy steel wires are twisted and compacted to form a steel wire rope, applying positive pressure oil to one end of the steel wire rope allows the oil to flow through the pressure retention groove 102. During use, when the steel wire rope bends or vibrates, a small amount of oil can seep out through the pressure closing groove 101, ensuring that both the inner and outer zinc-aluminum alloy steel wires of the steel wire rope are fully lubricated. Furthermore, maintenance is convenient; simply applying positive pressure oil to one end of the steel wire rope is sufficient to achieve full lubrication of the entire steel wire rope, both inside and out.

[0053] In the mold frame mechanism of the present invention, when in use, the wire drawing mold, the second-stage drawing mold 2 or the third-stage drawing mold 3 can be placed into the mold holder 4. The steel wire body 1 first passes through the wire drawing powder hopper 5 and then passes through the mold in the mold holder 4.

[0054] like Figure 13 As shown, the drawing powder is filled between two variable-capacity clamps 9. Under the elastic tension of the tension spring 903, the variable-capacity clamps 9 tend to move closer to each other, so that after the drawing powder is consumed, it can move closer to each other as the two variable-capacity clamps 9 move closer to each other, thus maintaining the powder filling position height of the drawing powder.

[0055] When the drawing powder exhibits powder bridging, the steel wire body 1 forms a cylindrical cavity through the powder without collapsing. This makes it difficult for the steel wire body 1 to fully contact the powder. At this time, the surface of the steel wire body 1 lacks lubrication from the powder, leading to increased drawing resistance. Figure 15 As shown, when the pulling resistance is greater than the supporting force of the pulling spring 8, the pulling spring 8 will be compressed, causing the outer slide block 6 to move axially along the supporting slide shaft 7.

[0056] At this time, the sliding gear 921 meshes with the tooth groove 922, causing the sliding gear 921 to rotate counterclockwise. The sliding gear 921 drives the drive pulley 919 to rotate counterclockwise, as shown. Figure 12 As shown, the drive pulley 919 drives the driven pulley 918 to rotate counterclockwise synchronously via the synchronous belt 920. In this direction, the driven pulley 918 can drive the one-way ratchet 917 to rotate counterclockwise. Through the transmission of the second bevel tooth 913 and the first bevel tooth 912, the dial wheel 910 rotates clockwise.

[0057] When the dial 910 rotates clockwise, it intermittently moves the hammer block 908 backward. The hammer block 908, in conjunction with the compression spring 909, delivers high-frequency hammering to the hammer seat 906. This, transmitted through the transverse slide plate 904 and the clamping shaft 901, causes the variable-capacity clamping plates 9 to move closer together in a high-frequency impact, automatically breaking up powder bridging. This results in a more uniform distribution of the drawing powder, allowing it to fully contact the wire body 1, ensuring adequate lubrication and reducing drawing resistance.

[0058] After the pulling resistance decreases, the pulling spring 8 returns to its original position and extends, causing the drive pulley 919 and driven pulley 918 to reverse. When the driven pulley 918 reverses, the driven pulley 918 and the one-way ratchet 917 rotate relative to each other, so that the one-way ratchet 917 is not driven to rotate by the driven pulley 918, and the dial wheel 910 remains stationary.

[0059] The mold frame mechanism of the present invention, through the above-mentioned settings, can ensure that the drawing powder is fully in contact with the steel wire body 1 after the drawing powder is filled into the drawing powder hopper 5. When the drawing powder is missing, it can be automatically detected and the powder arching can be automatically broken, reducing the need for manual supervision.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength, corrosion-resistant zinc-aluminum alloy steel wire, comprising the wire body, characterized in that: The surface of the steel wire body is provided with a pressure closing groove, and the center of the steel wire body is provided with a pressure retention groove. The cross-section of the pressure retention groove is set to be circular. Both the pressure closing groove and the pressure retention groove are set along the length direction of the steel wire body. The pressure retention groove is connected to the outer surface of the steel wire body through the pressure closing groove. When the steel wire body is subjected to radial extrusion force, the pressure closing groove closes and the pressure retention groove remains in place.

2. A production process for high-strength, corrosion-resistant zinc-aluminum alloy steel wire, wherein the high-strength, corrosion-resistant zinc-aluminum alloy steel wire as described in claim 1 is produced by this process, characterized in that... Includes the following steps: Step 1, pretreatment: Immerse the wire rod in a hydrochloric acid bath to remove the surface iron oxide scale and rust through a chemical reaction; After pickling, a borax coating is applied, which plays a role in lubrication, friction reduction, and prevention of high-temperature oxidation of the steel substrate during subsequent drawing and heat treatment. Step two, drawing, the drawing process includes drawing die, second-stage drawing die, third-stage drawing die and die frame mechanism; In the first stage, the wire rod is gradually drawn to the diameter of the finished steel wire by using progressively smaller drawing dies to form the steel wire body; In the second stage, several sets of second-stage drawing dies are used to draw pressure-closed grooves on the surface of the steel wire body. In the third stage, several sets of three-stage drawing dies are used to draw the steel wire inside the body through the pressure closing groove to form a pressure retention groove. The drawing die, the second-stage drawing die, and the third-stage drawing die are all individually installed on the die frame mechanism, and the drawing powder is applied through the die frame mechanism during the drawing process; Step 3, heat treatment: heat the steel wire body obtained in Step 2 with natural gas combustion to the austenitizing temperature, so that the pearlite structure is completely transformed into austenite; depending on different production standards, lead bath or water bath quenching treatment is selected. Step 4, pickling: The heat-treated steel wire body is continuously immersed in a hydrochloric acid pickling tank to remove the surface oxide layer through chemical reaction. After pickling, it is rinsed with clean water to remove residual hydrochloric acid and iron salts. Step 5, fluxing: Immerse the pickled and rinsed steel wire body into the fluxing solution tank, and evenly coat it with fluxing solution. The fluxing solution forms a thin and continuous salt film on the surface of the steel wire body, isolating the air from the steel substrate. The coated steel wire body is heated to 100-150℃ in a hot air drying oven to quickly evaporate the surface moisture. Step 6: Hot-dip galvanizing. The zinc pot is heated with natural gas, and zinc ingots and an appropriate amount of aluminum powder are melted into a molten zinc-aluminum liquid at 445-465℃. The dried steel wire body is continuously immersed in the molten zinc-aluminum liquid to form a coating on the surface of the steel wire body. In the molten zinc-aluminum liquid, zinc, aluminum and iron undergo an alloying reaction, and finally a zinc-aluminum alloy layer is formed in the coating to obtain zinc-aluminum alloy steel wire. The zinc-aluminum alloy steel wire is then passed through a cooling water tank, where the rapid cooling effect of the water causes the zinc-aluminum alloy layer to solidify quickly from a molten state. Step 7, Wiping: First, a pressure swing adsorption nitrogen generator is used to separate nitrogen gas with a purity of ≥99% from the air. The surface of the cooled zinc-aluminum alloy steel wire is then blown off with a high-pressure nitrogen nozzle to remove the attached zinc-aluminum dust. The inert protection of nitrogen gas is used to prevent the high-temperature zinc-aluminum layer from oxidizing again. Step 8: The finished zinc-aluminum alloy steel wire, which has been wiped with nitrogen, is continuously wound into a coil or roll using a winding machine.

3. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 2, characterized in that: The second-stage drawing die is provided with a drawing hole, and a closed groove extrusion part is fixedly provided in the drawing hole. When the steel wire body is drawn through the second-stage drawing die, the steel wire body passes through the drawing hole, so that the closed groove extrusion part extrudes the surface of the steel wire body, thereby forming a pressure closed groove. The length of the closed groove extrusion section in several sets of second-order drawing dies increases progressively.

4. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 3, characterized in that: The difference between the three-stage drawing die and the two-stage drawing die is that, based on the two-stage drawing die, a retaining groove extrusion section is added to the surface of the closed groove extrusion section.

5. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 2, characterized in that: The mold frame mechanism includes a mold holder and a wire drawing powder hopper fixedly installed with the mold holder. The wire drawing die, second-stage drawing die or third-stage drawing die is set in the mold holder. The steel wire body first passes through the wire drawing powder hopper and then passes through the wire drawing die, second-stage drawing die or third-stage drawing die in the mold holder. An outer slide is fixedly installed on the surface of the mold holder. A support slide shaft is inserted inside the outer slide. A pull spring is sleeved on the outside of the support slide shaft. The pull spring applies pressure to the outer slide in the opposite direction to the movement of the steel wire body. The drawing powder hopper is equipped with variable displacement clamps, which are plate-shaped structures symmetrically arranged on both sides of the hopper. Drawing powder is filled between the two variable displacement clamps, which tend to move closer to each other. When the drawing resistance of the steel wire increases, causing the drawing spring to be compressed, the variable displacement clamps vibrate.

6. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 5, characterized in that: A clamping shaft is fixedly installed on the surface of the variable capacity clamping plate. The clamping shaft passes through the side wall of the drawing powder hopper and extends to the outside of the drawing powder hopper. A synchronous back plate is fixedly installed at the end of the clamping shaft. A tension spring is connected between the synchronous back plate and the outer surface of the drawing powder hopper. The tension spring provides elastic tension, so that the two variable capacity clamping plates have a tendency to move closer to each other. A horizontal sliding plate is fixedly installed on the synchronous back plate, and a sliding plate retainer is fixedly installed at the bottom of the powder drawing chamber. The horizontal sliding plate is limited by the sliding plate retainer.

7. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 6, characterized in that: A hammer seat is fixedly installed on the surface of the transverse slide plate. A positioning shaft is fixedly installed between the hammer seat and the synchronization back plate. A hammer block is sleeved on the outside of the positioning shaft. A compression spring is installed on one side of the hammer block, and a dial is installed on the other side of the hammer block. When the pulling resistance of the steel wire increases, causing the pulling spring to be compressed, the dial can rotate, which moves the hammer block to hammer the hammer seat, causing the two variable displacement clamps to impact and vibrate in the direction of moving closer to each other.

8. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 7, characterized in that: The rotation limit of the dial is set in the hammer base, and the surface of the hammer base is also fixedly provided with a bevel tooth fixing frame, in which a first bevel tooth and a second bevel tooth are rotatably installed; The dial wheel and the first bevel gear are coaxially driven and installed. The first bevel gear and the second bevel gear mesh with each other. A sleeve shaft is coaxially fixed on the second bevel gear. The second bevel gear is rotatably limited in the bevel gear fixing frame through the sleeve shaft. A square rod shaft is inserted in the sleeve shaft. The square rod shaft can move axially relative to the sleeve shaft. When the square rod shaft rotates, it can drive the sleeve shaft to rotate. A support frame is fixedly installed on the outside of the mold holder. The support frame provides positioning support for the square rod shaft.

9. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 8, characterized in that: One-way ratchet components are fixedly installed at both ends of the square rod shaft. A driven pulley is installed on the outside of the one-way ratchet component. The one-way ratchet component has a one-way transmission function. The driven pulley drives the one-way ratchet component to rotate only when it rotates in one of the rotation directions. A drive pulley is located outside the driven pulley, and a synchronous belt is installed between the drive pulley and the driven pulley for transmission.

10. The production process of high-strength corrosion-resistant zinc-aluminum alloy steel wire according to claim 9, characterized in that: The surface of the supporting slide shaft is provided with toothed grooves, and a slide gear is rotatably arranged in the outer slide. The slide gear and the toothed grooves mesh with each other. When the pulling resistance of the steel wire body increases, causing the pulling spring to be compressed, the outer slide moves along the axial direction of the supporting slide shaft, so that the toothed groove drives the slide gear to rotate. The slide gear is coaxially installed with the drive pulley.

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