Pure nickel wire for woven mesh and preparation method of pure nickel wire

Abstract

The invention belongs to the field of metal material processing, and discloses a pure nickel wire for a woven mesh and a preparation method thereof, the pure nickel wire comprises the following raw materials by mass: 95-97 parts of an electrolytic nickel plate; 0.2 to 0.6 part of a grain refiner; 3.1 to 5.5 parts of a surface treating agent; 2-4 parts of a lubricant; 0.6-1 part of an auxiliary deoxidizing agent; and 0.5 to 1.5 parts of a reinforcing agent. According to the pure nickel wire for the woven mesh, the high-purity electrolytic nickel plate is adopted as a raw material, the grain refiner, the reinforcing agent and the surface treating agent are adopted as auxiliary materials, the impurity content is effectively controlled, grains are refined, the mechanical property and durability are improved, a compact and uniform internal structure is formed, the tensile strength, the ductility and the toughness are remarkably improved, and the service life of the pure nickel wire is prolonged. Meanwhile, through the formation of a compact protective film on the surface, the corrosion resistance and the surface stability are further improved, and the excellent processability and the net forming quality in the weaving processing process are ensured.

Description

Technical Field

[0001] The present invention relates to the field of metal material processing, and in particular to a pure nickel wire for braiding mesh and a preparation method thereof. Background Art

[0002] Pure nickel wire for braided mesh refers to a slender metal wire made from high-purity nickel. It is specifically used for weaving various metal mesh structures due to its excellent corrosion and oxidation resistance, high-temperature stability, and good ductility and toughness. Drawing is a key step in the preparation of pure nickel wire. By applying axial tension, the nickel wire passes through the drawing die, continuously reducing its diameter while optimizing its internal structure.

[0003] Drawing can not only achieve precise control of wire size to meet the weaving requirements of different specifications, but also effectively refine the grain size and improve the mechanical properties of nickel wire, such as tensile strength, elongation and toughness, thereby ensuring its good workability and durability in subsequent weaving and actual use. If multi-stage drawing cannot be performed during the preparation process, a single large deformation will cause uneven force on the wire, coarse and loose internal structure, and residual stress concentration, which will easily cause cracks, fractures and other failure problems in subsequent use. At the same time, the diameter size is difficult to accurately control, resulting in rough surface quality, a significant decrease in tensile strength, ductility and flexibility, and thus seriously affecting the molding quality, overall stability and service life of the woven mesh.

[0004] Therefore, how to provide a pure nickel wire for braiding mesh and a preparation method thereof is a problem that needs to be solved urgently. Summary of the Invention

[0005] The embodiment of the present invention provides a pure nickel wire for braided mesh and a preparation method thereof, so as to solve the problem in the prior art that the diameter size is difficult to accurately control, resulting in rough surface quality and a significant decrease in tensile strength, ductility and flexibility.

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, the following is a brief summary. This summary is not intended to be an extensive review, identify key or critical elements, or delineate the scope of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the detailed description that follows.

[0007] According to a first aspect of an embodiment of the present invention, a pure nickel wire for braiding a mesh is provided.

[0008] In one embodiment, the braided mesh is made of pure nickel wire, which is composed of the following raw materials in parts by mass: 95-97 parts of electrolytic nickel plate, 0.2-0.6 parts of grain refiner, 3.1-5.5 parts of surface treatment agent, 2-4 parts of lubricant, 0.6-1 parts of auxiliary deoxidizer and 0.5-1.5 parts of reinforcing agent.

[0009] In one embodiment, the nickel content in the electrolytic nickel plate is ≥99.9%, and the impurity content in the electrolytic nickel plate is ≤0.1%; The impurities in the electrolytic nickel plate include at least one or more of iron, carbon, sulfur, silicon, copper and oxides.

[0010] In one embodiment, the grain refiner is composed of the following raw materials in parts by mass: 0.1-0.4 parts of titanium powder, 0.05-0.1 parts of amorphous boron powder and 0.05-0.1 parts of yttrium nickel master alloy.

[0011] In one embodiment, the surface treatment agent is composed of the following raw materials in parts by weight: 2-3 parts of pickling solution, 1-2 parts of ethanol cleaning agent and 0.1-0.5 parts of surface modifier; Wherein, the pickling solution is one or more of dilute sulfuric acid solution, hydrochloric acid solution or nitric acid solution; The surface modifier is a silane coupling agent.

[0012] In one embodiment, the lubricant is one or more of calcium stearate lubricant, molybdenum disulfide suspension lubricant and polyethylene glycol-based nanolubricant.

[0013] According to a second aspect of an embodiment of the present invention, a method for preparing pure nickel wire for braiding mesh is provided.

[0014] In one embodiment, the method for preparing the pure nickel wire for braiding mesh comprises: S1. Place the electrolytic nickel plate in a vacuum induction furnace and heat it to 1450-1500°C to melt it into a liquid state, and then add an auxiliary deoxidizer, a grain refiner, and a reinforcing agent in sequence and stir to make the ingredients uniform to obtain an initial mixed product; S2, standing the initial mixed product for 10 minutes to remove slag, and casting the mixed product after slag removal into nickel alloy billets; S3, heating the nickel alloy billet to 1100-1150° C. and holding the temperature for 1 hour, forming the nickel alloy billet into wire rods by hot rolling technology, and annealing the hot rolled wire rods in a mixed atmosphere for 1-2 hours, and water cooling after annealing to fix the grain structure; S4. Drawing the wire to a preset diameter using a multi-stage drawing technique to obtain a nickel wire, and immersing the drawn nickel wire in an acid wash solution to remove a surface oxide layer of the nickel wire; S5, dipping the nickel wire after removing the surface oxide layer in a silane coupling agent solution, and drying it after dipping to form a dense protective film; S6. Perform secondary annealing on the nickel wire in a protective atmosphere for 0.5-1 hour, and then air-cool the nickel wire to obtain a finished pure nickel wire.

[0015] In one embodiment, the mixed atmosphere is a mixture of hydrogen and argon; the protective atmosphere is pure argon.

[0016] In one embodiment, the method of drawing the wire to a preset diameter using a multi-stage drawing technique to obtain a nickel wire, and immersing the drawn nickel wire in a pickling solution to remove a surface oxide layer of the nickel wire includes: S41, using calcium stearate lubricant, rough drawing the wire to a preset diameter, and using ethanol cleaning agent to remove residual lubricant on the surface of the wire after each drawing pass; S42, using a molybdenum disulfide suspension lubricant, drawing the wire to a preset diameter, and maintaining the wire temperature at 80° C. during the drawing process; S43, using a polyethylene glycol-based nano-lubricant, fine-drawing the wire to a preset diameter; S44. Immerse the drawn nickel wire in a pickling solution for 5-10 minutes to remove the surface oxide layer of the nickel wire.

[0017] In one embodiment, the wires made from the nickel alloy rods using the hot rolling technology have a diameter of 6 mm.

[0018] In one embodiment, the wire is roughly drawn to a preset diameter of 3 mm, and the compression rate is controlled to be 50%; The wire is drawn to a preset diameter of 1 mm and the compression rate is controlled to be 66%; The wire is finely drawn to a preset diameter of 0.1 mm, and the compression rate is controlled to be 90%.

[0019] The technical solution provided by the embodiment of the present invention may have the following beneficial effects: 1. The pure nickel wire for woven mesh provided by the present invention adopts high-purity electrolytic nickel plate as raw material, supplemented by grain refiner, reinforcing agent and surface treatment agent, which not only effectively controls the impurity content, but also refines the grains, improves the mechanical properties and durability, forms a dense and uniform internal structure, and significantly enhances the tensile strength, elongation and toughness. At the same time, through the formation of a dense protective film on the surface, the corrosion resistance and surface stability are further improved, ensuring excellent processability and mesh quality during the weaving process.

[0020] 2. The present invention combines hot rolling with mixed atmosphere annealing to effectively refine the grains and improve the mechanical properties of the wire, creating good conditions for subsequent multi-stage drawing. The multiple drawing processes can effectively avoid surface cracks and internal structural defects, and use silane coupling agent treatment to form a dense protective film, which significantly improves the surface corrosion resistance of the nickel wire. Finally, secondary annealing is carried out in a protective atmosphere to effectively release residual stress and optimize the grain structure, so that the pure nickel wire can flexibly select annealing, solution or aging and other heat treatment processes according to specific application requirements, thereby ensuring that the finished pure nickel wire has excellent performance and stable quality.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0023] Figure 1 The present invention is a flow chart showing a method for preparing pure nickel wire for braided mesh according to an exemplary embodiment. DETAILED DESCRIPTION

[0024] The following description and accompanying drawings sufficiently illustrate the specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, including all available equivalents thereof. Herein, the terms "first," "second," and the like are used solely to distinguish one element from another and do not require or imply any actual relationship or order between these elements. In practice, the first element can also be referred to as the second element, and vice versa. Furthermore, the terms "comprise," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a structure, device, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such structure, device, or apparatus. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the structure, device, or apparatus comprising the element. The various embodiments herein are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Similar or identical parts between the various embodiments can be referenced to each other.

[0025] The terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are intended only to facilitate the description of this document and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In the description herein, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, they can be mechanical or electrical connections, or they can be internal connections between two elements, they can be directly connected, or they can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] As used herein, unless otherwise specified, the term "plurality" means two or more.

[0027] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0028] In this article, the term "and / or" is used to describe the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0029] It should be understood that, although the various steps in the flowchart are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps may be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but may be performed at different times. The execution order of these sub-steps or stages is not necessarily to be performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0030] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0031] According to one embodiment of the present invention, a pure nickel wire for braiding a mesh is provided.

[0032] In this optional embodiment, the woven mesh is made of pure nickel wire, which is composed of the following raw materials in parts by mass: 95-97 parts of electrolytic nickel plate, 0.2-0.6 parts of grain refiner, 3.1-5.5 parts of surface treatment agent, 2-4 parts of lubricant, 0.6-1 parts of auxiliary deoxidizer and 0.5-1.5 parts of reinforcing agent.

[0033] In this optional embodiment, the nickel content in the electrolytic nickel plate is ≥99.9%, and the impurity content in the electrolytic nickel plate is ≤0.1%; The impurities in the electrolytic nickel plate include at least one or more of iron, carbon, sulfur, silicon, copper and oxides.

[0034] In this optional embodiment, the grain refiner is composed of the following raw materials in parts by mass: 0.1-0.4 parts of titanium powder, 0.05-0.1 parts of amorphous boron powder and 0.05-0.1 parts of yttrium nickel master alloy.

[0035] In this alternative embodiment, the grain refiner of the present invention, composed of titanium powder, amorphous boron powder, and a yttrium-nickel master alloy, effectively refines the grain structure of nickel alloys. The titanium powder promotes nucleation and refines the grains; the amorphous boron powder removes impurities and increases the nucleation rate; and the yttrium-nickel master alloy, through the rare earth element yttrium, improves the grain boundary structure and enhances the toughness of the material. The synergistic effect of these three elements significantly improves the mechanical properties, processing performance, and long-term stability of pure nickel wire, meeting the high demands of woven mesh products.

[0036] In this optional embodiment, the surface treatment agent is composed of the following raw materials in parts by mass: 2-3 parts of pickling solution, 1-2 parts of ethanol cleaning agent and 0.1-0.5 parts of surface modifier; Wherein, the pickling solution is one or more of dilute sulfuric acid solution, hydrochloric acid solution or nitric acid solution; The surface modifier is a silane coupling agent.

[0037] In this optional embodiment, the lubricant is one or more of calcium stearate lubricant, molybdenum disulfide suspension lubricant and polyethylene glycol-based nanolubricant.

[0038] According to another embodiment of the present invention, a method for preparing pure nickel wire for braiding mesh is also provided.

[0039] In this optional embodiment, the method for preparing the pure nickel wire for braiding the mesh includes: S1. Place the electrolytic nickel plate in a vacuum induction furnace and heat it to 1450-1500°C to melt it into a liquid state, and then add an auxiliary deoxidizer, a grain refiner, and a reinforcing agent in sequence and stir to make the ingredients uniform to obtain an initial mixed product; S2, standing the initial mixed product for 10 minutes to remove slag, and casting the mixed product after slag removal into nickel alloy billets; S3, heating the nickel alloy billet to 1100-1150° C. and holding the temperature for 1 hour, forming the nickel alloy billet into a wire rod by hot rolling technology, and annealing the hot rolled wire rod in a mixed atmosphere (the mixed atmosphere is a mixture of hydrogen and argon) for 1-2 hours, and water cooling after annealing to fix the grain structure; In this optional embodiment, the insulated billet is quickly transferred to the hot rolling mill entrance to prevent a rapid temperature drop. Under the condition of controlling the temperature to be no less than 900°C, multiple continuous rolling passes are performed, with the reduction (i.e., thickness reduction) in each pass controlled between 10% and 20% to prevent excessive deformation in a single pass and cracking. Appropriate intermediate heating can be used during the rolling process to ensure that the deformation temperature remains within an appropriate range and maintain good plasticity. The rolling speed is generally controlled within the range of 0.5-2 m / s to ensure sufficient plastic deformation while preventing a sudden temperature drop due to excessive speed or surface burns due to frictional overheating. After multiple rolling passes, the nickel alloy billet is gradually rolled into wire rod of approximately the desired size. The diameter of the wire rod after rolling can generally be controlled within the range of 6-10 mm (the diameter of the wire rod after rolling in this invention is assumed to be 6 mm).

[0040] S4. Use a multi-stage drawing technology to draw the wire to a preset diameter to obtain a nickel wire, and immerse the drawn nickel wire in a pickling solution to remove the surface oxide layer of the nickel wire.

[0041] In this optional embodiment, the step of drawing the wire to a preset diameter using a multi-stage drawing technique to obtain a nickel wire, and immersing the drawn nickel wire in a pickling solution to remove a surface oxide layer of the nickel wire includes: S41, using calcium stearate lubricant, rough-drawing the wire to a preset diameter (3 mm), and using ethanol cleaning agent to remove residual lubricant on the surface of the wire after each drawing pass; S42, using molybdenum disulfide suspension lubricant, drawing the wire to a preset diameter (1 mm), and maintaining the wire temperature at 80° C. during the drawing process; S43, using a polyethylene glycol-based nano-lubricant, finely drawing the wire to a preset diameter (0.1); S44. Immerse the drawn nickel wire in a pickling solution for 5-10 minutes to remove the surface oxide layer of the nickel wire.

[0042] In this optional embodiment, the present invention adopts a multi-stage drawing technology to process the wire, and by selecting lubricants with different properties in stages, the lubrication effect and wire surface quality during the drawing process are significantly improved.

[0043] Calcium stearate lubricant is used in the rough drawing stage, which effectively reduces deformation resistance and improves drawing efficiency. Ethanol cleaning agent is used to remove surface residues after each pass to avoid carbon deposition of lubricant or affect subsequent processes; molybdenum disulfide suspension lubricant is used in the medium drawing stage, and the wire temperature is controlled at 80°C during the drawing process, which further optimizes the friction conditions, reduces the risk of surface scratches and wire breakage, and ensures the dimensional accuracy and mechanical properties of the nickel wire; polyethylene glycol-based nano-lubricant is used in the fine drawing stage, taking advantage of its excellent lubrication and cleanliness to make the surface of the finished nickel wire smoother and more delicate, significantly improving the surface quality.

[0044] Finally, by treating the drawn nickel wire in pickling solution for 5-10 minutes, the surface oxide layer and trace residues are completely removed, which provides a guarantee for subsequent surface treatment and performance stability, thereby effectively controlling the stress concentration and defect generation of the nickel wire during the drawing process, improving the comprehensive performance and product consistency of the pure nickel wire, and thus meeting the strict requirements of high-performance nickel wire for woven mesh on dimensional accuracy, surface quality and mechanical properties.

[0045] S5, dipping the nickel wire after removing the surface oxide layer in a silane coupling agent solution, and drying it after dipping to form a dense protective film; S6. The nickel wire is subjected to secondary annealing in a protective atmosphere (the protective atmosphere is pure argon) for 0.5-1 hour. After the annealing is completed, the nickel wire is air-cooled to obtain a finished pure nickel wire.

[0046] In this optional embodiment, the wire is roughly drawn to a preset diameter of 3 mm, and the compression rate is controlled to 50%; the wire is medium drawn to a preset diameter of 1 mm, and the compression rate is controlled to 66%; the wire is fine drawn to a preset diameter of 0.1 mm, and the compression rate is controlled to 90%.

[0047] In this alternative embodiment, the present invention rough-draws the wire to various preset diameters (3mm, 1mm, and 0.1mm) and controls compression ratios (50%, 66%, and 90%). By gradually reducing the diameter in stages, this ensures uniformity and stability during the drawing process. The high compression ratio effectively avoids surface defects and internal stress concentration, ensuring the dimensional accuracy, mechanical properties, and surface quality of the nickel wire, improving overall processability and finished product consistency.

[0048] The specific embodiments of the present invention are further described below in conjunction with examples and comparative examples: Example 1 (1) Raw material preparation: 95 parts of electrolytic nickel plate, 0.2 parts of grain refiner, 2 parts of lubricant, 0.6 parts of auxiliary deoxidizer and 0.5 parts of reinforcing agent.

[0049] (2) Melting process: 95 parts of electrolytic nickel plate were selected and placed in a vacuum induction furnace and heated to 1480 °C. 0.6 parts of auxiliary deoxidizer, 0.2 parts of grain refiner and 0.5 parts of reinforcing agent were added in sequence and stirred evenly to obtain the initial mixed product.

[0050] (3) Casting: The initial mixed product is allowed to stand for 10 minutes to remove slag, and then cast into nickel alloy billets.

[0051] (4) Hot rolling and annealing: The nickel alloy billet is heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour. After annealing, it is water-cooled to fix the crystal.

[0052] (5) Drawing and pickling: Select 2 parts of lubricant and use multi-stage drawing technology to draw the wire to 0.1 mm. Then immerse the drawn nickel wire in pickling solution for 5 minutes to remove the surface oxide layer.

[0053] (6) Surface treatment and secondary annealing: The nickel wire with the oxide layer removed is immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour. Pure nickel wire is obtained after air cooling.

[0054] Example 2 (1) Raw material preparation: 96 parts of electrolytic nickel plate, 0.4 parts of grain refiner, 3 parts of lubricant, 0.8 parts of auxiliary deoxidizer and 1 part of reinforcing agent.

[0055] (2) Melting process: 96 parts of electrolytic nickel plates were selected and placed in a vacuum induction furnace and heated to 1480°C. 0.8 parts of auxiliary deoxidizer, 0.4 parts of grain refiner and 1 part of reinforcing agent were added in sequence and stirred evenly to obtain an initial mixed product.

[0056] (3) Casting: The initial mixed product is allowed to stand for 10 minutes to remove slag, and then cast into nickel alloy billets.

[0057] (4) Hot rolling and annealing: The nickel alloy billet is heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour. After annealing, it is water-cooled to fix the crystal.

[0058] (5) Drawing and pickling: Select 3 parts of lubricant, use the stage drawing technology to draw the wire to 0.1 mm, and immerse the drawn nickel wire in the pickling solution for 5 minutes to remove the surface oxide layer.

[0059] (6) Surface treatment and secondary annealing: The nickel wire with the oxide layer removed is immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour. Pure nickel wire is obtained after air cooling.

[0060] Example 3 (1) Raw material preparation: 97 parts of electrolytic nickel plate, 0.6 parts of grain refiner, 4 parts of lubricant, 1 part of auxiliary deoxidizer and 1.5 parts of reinforcing agent.

[0061] (2) Melting process: 97 parts of electrolytic nickel plate were selected and placed in a vacuum induction furnace and heated to 1480 °C. 1 part of auxiliary deoxidizer, 0.6 parts of grain refiner and 1.5 parts of reinforcing agent were added in sequence and stirred evenly to obtain the initial mixed product.

[0062] (3) Casting: The initial mixed product is allowed to stand for 10 minutes to remove slag, and then cast into nickel alloy billets.

[0063] (4) Hot rolling and annealing: The nickel alloy billet is heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour. After annealing, it is water-cooled to fix the crystal.

[0064] (5) Drawing and pickling: 4 parts of lubricant were selected, and the wire was drawn to 0.1 mm using a multi-stage drawing technique. The drawn nickel wire was immersed in a pickling solution for 5 minutes to remove the surface oxide layer.

[0065] (6) Surface treatment and secondary annealing: The nickel wire with the oxide layer removed is immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour. Pure nickel wire is obtained after air cooling.

[0066] Comparative Example 1 (1) Raw material preparation: 95 parts of electrolytic nickel plate, 2 parts of lubricant, 0.6 parts of auxiliary deoxidizer and 0.5 parts of reinforcing agent.

[0067] (2) Melting process: 95 parts of electrolytic nickel plate were selected and placed in a vacuum induction furnace and heated to 1480 °C. 0.6 parts of auxiliary deoxidizer and 0.5 parts of reinforcing agent were added in sequence and stirred evenly to obtain an initial mixed product.

[0068] (3) Casting: The initial mixed product is allowed to stand for 10 minutes to remove slag, and then cast into nickel alloy billets.

[0069] (4) Hot rolling and annealing: The nickel alloy billet is heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour. After annealing, it is water-cooled to fix the crystal.

[0070] (5) Drawing and pickling: Select 2 parts of lubricant and use multi-stage drawing technology to draw the wire to 0.1 mm. Then immerse the drawn nickel wire in pickling solution for 5 minutes to remove the surface oxide layer.

[0071] (6) Surface treatment and secondary annealing: The nickel wire with the oxide layer removed is immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour. Pure nickel wire is obtained after air cooling.

[0072] Comparative Example 2 (1) Raw material preparation: 96 parts of electrolytic nickel plate, 0.4 parts of grain refiner, 3 parts of lubricant and 1 part of reinforcing agent.

[0073] (2) Melting process: 96 parts of electrolytic nickel plates were placed in a vacuum induction furnace and heated to 1480°C. 0.4 parts of grain refiner and 1 part of reinforcing agent were added in sequence and stirred evenly to obtain an initial mixed product.

[0074] (3) Casting: The initial mixed product is allowed to stand for 10 minutes to remove slag, and then cast into nickel alloy billets.

[0075] (4) Hot rolling and annealing: The nickel alloy billet is heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour. After annealing, it is water-cooled to fix the crystal.

[0076] (5) Drawing and pickling: Select 3 parts of lubricant, use the stage drawing technology to draw the wire to 0.1 mm, and immerse the drawn nickel wire in the pickling solution for 5 minutes to remove the surface oxide layer.

[0077] (6) Surface treatment and secondary annealing: The nickel wire with the oxide layer removed is immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour. Pure nickel wire is obtained after air cooling.

[0078] Comparative Example 3 (1) Raw material preparation: 97 parts of electrolytic nickel plate, 0.6 parts of grain refiner, 4 parts of lubricant and 1 part of auxiliary deoxidizer.

[0079] (2) Melting process: 97 parts of electrolytic nickel plate were selected and placed in a vacuum induction furnace and heated to 1480 °C. 1 part of auxiliary deoxidizer and 0.6 part of grain refiner were added in sequence and stirred evenly to obtain an initial mixed product.

[0080] (3) Casting: The initial mixed product is allowed to stand for 10 minutes to remove slag, and then cast into nickel alloy billets.

[0081] (4) Hot rolling and annealing: The nickel alloy billet is heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour. After annealing, it is water-cooled to fix the crystal.

[0082] (5) Drawing and pickling: 4 parts of lubricant were selected, and the wire was drawn to 0.1 mm using a multi-stage drawing technique. The drawn nickel wire was immersed in a pickling solution for 5 minutes to remove the surface oxide layer.

[0083] (6) Surface treatment and secondary annealing: The nickel wire with the oxide layer removed is immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour. Pure nickel wire is obtained after air cooling.

[0084] Table 1: Performance comparison table of various embodiments and comparative examples The present invention optimizes the smelting, hot rolling, drawing, and surface treatment processes by rationally proportioning electrolytic nickel plates, grain refiners, auxiliary deoxidizers, lubricants, and reinforcing agents, significantly improving the overall performance of pure nickel wire. As shown in Table 1, the pure nickel wires produced in Examples 1-3 significantly outperformed those in Comparative Examples 1-3 (ductility 32%-33.5%, tensile strength 365-380 MPa, and reduction of area 37.2%-40.3%) in key indicators such as ductility (38.4%-40.2%), tensile strength (410-430 MPa), and area reduction (45.1%-47%). This demonstrates that the preparation method of the present application effectively improves the plasticity and mechanical properties of pure nickel wire, making it more suitable for demanding woven mesh applications.

[0085] The present invention is not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A pure nickel wire for braiding mesh, characterized in that: The pure nickel wire is composed of the following raw materials in parts by mass: 95-97 parts of electrolytic nickel plate; Grain refiner 0.2-0.6 parts; 3.1-5.5 parts of surface treatment agent; 2-4 parts lubricant; Auxiliary deoxidizer 0.6-1 part; Enhancer 0.5-1.5 parts.

2. The pure nickel wire for braiding mesh according to claim 1, characterized in that: The nickel content of the electrolytic nickel plate is ≥99.9%, and the impurity content of the electrolytic nickel plate is ≤0.1%; The impurities in the electrolytic nickel plate include at least one or more of iron, carbon, sulfur, silicon, copper and oxides.

3. The pure nickel wire for braiding mesh according to claim 2, characterized in that: The grain refiner is composed of the following raw materials in parts by mass: 0.1-0.4 parts of titanium powder, 0.05-0.1 parts of amorphous boron powder and 0.05-0.1 parts of yttrium nickel master alloy.

4. The pure nickel wire for braiding mesh according to claim 3, characterized in that: The surface treatment agent is composed of the following raw materials in parts by mass: 2-3 parts of pickling solution, 1-2 parts of ethanol cleaning agent and 0.1-0.5 parts of surface modifier; Wherein, the pickling solution is one or more of dilute sulfuric acid solution, hydrochloric acid solution or nitric acid solution; The surface modifier is a silane coupling agent.

5. The pure nickel wire for braiding mesh according to claim 4, characterized in that: The lubricant is one or more of calcium stearate lubricant, molybdenum disulfide suspension lubricant and polyethylene glycol-based nano-lubricant.

6. A method for preparing pure nickel wire for braided mesh, for realizing the preparation of the pure nickel wire for braided mesh according to claim 5, characterized in that: The preparation method comprises: S1. Place the electrolytic nickel plate in a vacuum induction furnace and heat it to 1450-1500°C to melt it into a liquid state, and then add an auxiliary deoxidizer, a grain refiner, and a reinforcing agent in sequence and stir to make the ingredients uniform to obtain an initial mixed product; S2, standing the initial mixed product for 10 minutes to remove slag, and casting the mixed product after slag removal into nickel alloy billets; S3, heating the nickel alloy billet to 1100-1150° C. and holding the temperature for 1 hour, forming the nickel alloy billet into wire rods by hot rolling technology, and annealing the hot rolled wire rods in a mixed atmosphere for 1-2 hours, and water cooling after annealing to fix the grain structure; S4. Drawing the wire to a preset diameter using a multi-stage drawing technique to obtain a nickel wire, and immersing the drawn nickel wire in an acid wash solution to remove a surface oxide layer of the nickel wire; S5, dipping the nickel wire after removing the surface oxide layer in a silane coupling agent solution, and drying it after dipping to form a dense protective film; S6. Perform secondary annealing on the nickel wire in a protective atmosphere for 0.5-1 hour, and then air-cool the nickel wire to obtain a finished pure nickel wire.

7. The method for preparing pure nickel wire for braided mesh according to claim 6, characterized in that: The mixed atmosphere is a mixture of hydrogen and argon; the protective atmosphere is pure argon.

8. The method for preparing pure nickel wire for braided mesh according to claim 7, characterized in that: The method of drawing the wire to a preset diameter using a multi-stage drawing technology to obtain a nickel wire, and immersing the drawn nickel wire in a pickling solution to remove a surface oxide layer of the nickel wire includes: S41, using calcium stearate lubricant, rough drawing the wire to a preset diameter, and using ethanol cleaning agent to remove residual lubricant on the surface of the wire after each drawing pass; S42, using a molybdenum disulfide suspension lubricant, drawing the wire to a preset diameter, and maintaining the wire temperature at 80° C. during the drawing process; S43, using a polyethylene glycol-based nano-lubricant, fine-drawing the wire to a preset diameter; S44. Immerse the drawn nickel wire in a pickling solution for 5-10 minutes to remove the surface oxide layer of the nickel wire.

9. The method for preparing pure nickel wire for braided mesh according to claim 8, characterized in that: The diameter of the wire in which the nickel alloy rod is made into the wire by hot rolling technology is 6 mm.

10. The method for preparing pure nickel wire for braided mesh according to claim 8, characterized in that: The wire is roughly drawn to a preset diameter of 3 mm and the compression rate is controlled to 50%; The wire is drawn to a preset diameter of 1 mm and the compression rate is controlled to be 66%; The wire is finely drawn to a preset diameter of 0.1 mm, and the compression rate is controlled to be 90%.

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