Pure nickel wire for braided mesh and method of making same

Abstract

The application belongs to the field of metal material processing, and discloses a pure nickel wire for braided mesh and a preparation method thereof. The pure nickel wire is composed of the following raw materials in parts by mass: electrolytic nickel plate 95-97 parts; grain refiner 0.2-0.6 parts; surface treatment agent 3.1-5.5 parts; lubricant 2-4 parts; auxiliary deoxidizer 0.6-1 part; and reinforcing agent 0.5-1.5 parts. The pure nickel wire for braided mesh provided by the application uses high-purity electrolytic nickel plate as raw material, and is supplemented with grain refiner, reinforcing agent and surface treatment agent, so that the impurity content is effectively controlled, the grain is refined, the mechanical properties and durability are improved, the internal structure is formed to be dense and uniform, the tensile strength, elongation and toughness are significantly enhanced, the corrosion resistance and surface stability are further improved through the formation of a dense surface protective film, and the excellent processability in the braiding process and the mesh forming quality are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal material processing, in particular to a pure nickel wire for braided mesh and a preparation method thereof. BACKGROUND

[0002] The pure nickel wire for braided mesh refers to an elongated metal wire made of high-purity nickel material, which is specially applied to braiding various metal mesh structures due to its excellent corrosion resistance, oxidation resistance, high-temperature stability, and good ductility and toughness. In the preparation process of the pure nickel wire, the drawing process is one of the key steps. By applying axial tension, the nickel wire continuously reduces in diameter through the drawing die, and the internal microstructure is optimized.

[0003] Drawing not only realizes precise control of the wire size to meet the braiding needs of different specifications, but also effectively refines the grains and improves the mechanical properties of the nickel wire, such as tensile strength, elongation, and toughness, thereby ensuring good processability and durability in subsequent braiding and actual use. If multi-stage drawing cannot be performed during preparation, single large deformation will lead to uneven stress on the wire, coarse and non-dense internal structure, and concentrated residual stress, thereby easily causing cracking, breaking, and other failure problems in subsequent use. At the same time, the diameter size is difficult to precisely control, resulting in rough surface quality, a significant decrease in tensile strength, ductility, and flexibility, and thus seriously affecting the forming quality, overall stability, and service life of the braided mesh.

[0004] Therefore, how to provide a pure nickel wire for braided mesh and a preparation method thereof is a problem to be solved at present. SUMMARY

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

[0006] The following presents a simplified summary of some aspects of the disclosed embodiments in order to provide a basic understanding of such embodiments. This summary is not an extensive overview of the application. It is not intended to identify key / critical elements of the embodiments or to delineate the scope of the embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

[0007] According to a first aspect of the embodiments of the present application, a pure nickel wire for braided mesh is provided.

[0008] In one embodiment, the pure nickel wire for braided mesh is composed of the following mass fractions of raw materials:

[0009] Electrolytic nickel plate 95-97 parts, grain refiner 0.2-0.6 parts, surface treatment agent 3.1-5.5 parts, lubricant 2-4 parts, auxiliary deoxidizer 0.6-1 parts and reinforcing agent 0.5-1.5 parts.

[0010] In one embodiment, the content of nickel in the electrolytic nickel plate is ≥ 99.9%, and the content of impurities in the electrolytic nickel plate is ≤ 0.1%;

[0011] Among them, the impurities in the electrolytic nickel plate at least include one or more of iron, carbon, sulfur, silicon, copper and oxide.

[0012] In one embodiment, the grain refiner is composed of the following mass fraction of raw materials:

[0013] Titanium powder 0.1-0.4 parts, amorphous boron powder 0.05-0.1 parts and yttrium nickel intermetallic alloy 0.05-0.1 parts.

[0014] In one embodiment, the surface treatment agent is composed of the following mass fraction of raw materials:

[0015] Pickling solution 2-3 parts, ethanol cleaning agent 1-2 parts and surface modifier 0.1-0.5 parts;

[0016] Among them, the pickling solution is one or more of dilute sulfuric acid solution, hydrochloric acid solution or nitric acid solution;

[0017] The surface modifier is a silane coupling agent.

[0018] In one embodiment, the lubricant is one or more of calcium stearate lubricant, molybdenum disulfide suspension lubricant and polyethylene glycol-based nanometer lubricant.

[0019] According to the second aspect of the embodiment of the present application, a preparation method of pure nickel wire for woven mesh is provided.

[0020] In one embodiment, the preparation method of pure nickel wire for woven mesh comprises:

[0021] S1, the electrolytic nickel plate is placed in a vacuum induction furnace and heated to 1450-1500℃ to melt into a liquid state, and auxiliary deoxidizer, grain refiner and reinforcing agent are added in turn to stir to make the composition uniform, to obtain an initial mixed product;

[0022] S2, the initial mixed product is left for 10 minutes to remove slag, and the mixed product after slag removal is cast into a nickel alloy rod blank;

[0023] S3, the nickel alloy rod blank is heated to 1100-1150℃ and kept for 1 hour, the nickel alloy rod blank is made into wire by hot rolling technology, and the hot rolled wire is annealed in a mixed atmosphere for 1-2 hours, and then water cooled to fix the grain structure;

[0024] S4, using a multi-stage drawing technology to draw the wire to a preset diameter to obtain a nickel wire, and immersing the drawn nickel wire in an acid pickling solution to remove the surface oxide layer of the nickel wire;

[0025] S5, immersing the nickel wire after removing the surface oxide layer in a silane coupling agent solution, and drying after immersion to form a dense protective film;

[0026] S6, performing secondary annealing on the nickel wire in a protective atmosphere for 0.5-1 hour, and air cooling after annealing to obtain a finished pure nickel wire.

[0027] In one embodiment, the mixed atmosphere is a mixture of hydrogen and argon: the protective atmosphere is pure argon.

[0028] In one embodiment, the using a multi-stage drawing technology to draw the wire to a preset diameter to obtain a nickel wire, and immersing the drawn nickel wire in an acid pickling solution to remove the surface oxide layer of the nickel wire comprises:

[0029] S41, using a calcium stearate lubricant to draw the wire to a preset diameter, and using an ethanol cleaning agent to remove the residual lubricant on the surface of the wire after each drawing pass;

[0030] S42, using a molybdenum disulfide suspension lubricant to draw the wire to a preset diameter, and maintaining the temperature of the wire at 80℃ during drawing;

[0031] S43, using a polyethylene glycol-based nanometer lubricant to draw the wire to a preset diameter;

[0032] S44, immersing the drawn nickel wire in an acid pickling solution for 5-10 minutes to remove the surface oxide layer of the nickel wire.

[0033] In one embodiment, the wire diameter in the wire made from the nickel alloy bar using the hot rolling technology is 6mm.

[0034] In one embodiment, the wire is drawn to a preset diameter of 3mm, and the compression ratio is controlled to be 50%;

[0035] The wire is drawn to a preset diameter of 1mm, and the compression ratio is controlled to be 66%;

[0036] The wire is drawn to a preset diameter of 0.1mm, and the compression ratio is controlled to be 90%.

[0037] The technical scheme provided by the embodiment of the application can include the following beneficial effects:

[0038] 1. The pure nickel wire for braided mesh provided by the present application uses high-purity electrolytic nickel plate as raw material, supplemented with grain refiner, reinforcing agent and surface treatment agent, which effectively controls the impurity content, refines the grain, improves the mechanical properties and durability, forms a dense and uniform internal structure, significantly enhances the tensile strength, elongation and toughness, and at the same time, through the formation of a dense protective film on the surface, further improves the corrosion resistance and surface stability, ensuring excellent processability and mesh quality during braiding process.

[0039] 2. The present application combines hot rolling and mixed atmosphere annealing to effectively refine the grain and improve the mechanical properties of the wire rod, creating good conditions for subsequent multi-stage drawing. Surface cracks and internal organizational defects can be effectively avoided during the multi-stage drawing process, and a dense protective film is formed by using a silane coupling agent treatment, 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, solid solution or aging heat treatment process according to specific application requirements, thereby ensuring that the finished pure nickel wire has excellent performance and stable quality.

[0040] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings incorporated in the specification and forming a part thereof illustrate embodiments consistent with the present application and together with the description are used to explain the principles of the present application.

[0042] Figure 1 is a flow chart of a preparation method of a pure nickel wire for braided mesh according to an exemplary embodiment. DETAILED DESCRIPTION

[0043] The following description and drawings are illustrative of specific embodiments thereof and are not intended to limit the scope of the embodiments. Parts and features of some embodiments can be included or substituted in or for parts and features of other embodiments. The scope of the embodiments encompassed herein includes the whole scope of the claims together with all available equivalents of the claims. In this document, the terms "first", "second", etc. are used merely to distinguish one element from another, and do not require or imply any actual relationship or order between the elements. In fact, the first element can be referred to as the second element, and vice versa. Also, the terms "comprises", "comprising", or any other variations thereof are intended to cover a non-exclusive inclusion, such that a structure, device, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such structure, device, or apparatus. Without further limitation, an element defined by an "includes a" statement does not exclude the presence of additional identical elements in the structure, device, or apparatus that includes the element. Various embodiments are described in progressive stages, each of which focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0044] The terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, as used herein, indicate relative positions or orientation relationships based on the positions or orientation relationships shown in the drawings, and are only used for the convenience of description herein and simplification of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description herein, unless otherwise specified and limited, the terms "mount", "connect", "connection" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, it can be a communication between two elements inside, it can be a direct connection or an indirect connection through an intermediate medium, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0045] In this document, the term "multiple" means two or more, unless otherwise specified.

[0046] In this document, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means: A or B.

[0047] In this document, the term "and / or" is a description of the relationship between the objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0048] It should be understood that although the steps in the flowchart are shown in a sequential order following the arrows, the steps are not necessarily performed in the order shown by the arrows. Unless explicitly stated otherwise, the steps can be performed in other orders, and there is no strict order limitation for the steps. Moreover, at least some of the steps in the figure can include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but can be performed at different times, and the order of the sub-steps or stages is not necessarily sequential, but can be performed alternately or in rotation with at least some of the other steps or sub-steps or stages of other steps.

[0049] In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0050] According to one embodiment of the present application, a pure nickel wire for braided mesh is provided.

[0051] In this alternative embodiment, the pure nickel wire for braided mesh is composed of raw materials in the following mass fractions:

[0052] Electrolytic nickel plate 95-97 parts, grain refiner 0.2-0.6 parts, surface treatment agent 3.1-5.5 parts, lubricant 2-4 parts, auxiliary deoxidizer 0.6-1 part, and reinforcing agent 0.5-1.5 parts.

[0053] In this alternative embodiment, the nickel content in the electrolytic nickel plate is ≥99.9%, and the impurity content in the electrolytic nickel plate is ≤0.1%.

[0054] Among them, the impurities in the electrolytic nickel plate at least include one or more of iron, carbon, sulfur, silicon, copper and oxides.

[0055] In this alternative embodiment, the grain refiner is composed of raw materials in the following mass fractions:

[0056] Titanium powder 0.1-0.4 parts, amorphous boron powder 0.05-0.1 parts, and yttrium nickel intermediate alloy 0.05-0.1 parts.

[0057] In this alternative embodiment, the grain refiner of the present application is composed of titanium powder, amorphous boron powder and yttrium nickel intermediate alloy, which can effectively refine the grain structure of nickel alloy. Titanium powder promotes nucleation and refines grain; amorphous boron powder removes impurities and increases nucleation rate; yttrium nickel intermediate alloy improves grain boundary structure through rare earth element yttrium, and enhances material toughness. The synergistic effect of the three significantly improves the mechanical properties, processing performance and long-term stability of the pure nickel wire, meeting the high requirements of braided mesh products.

[0058] In this alternative embodiment, the surface treatment agent is composed of raw materials in the following mass fractions:

[0059] acid pickling solution 2-3 parts, ethanol cleaning agent 1-2 parts and surface modifier 0.1-0.5 parts;

[0060] The acid pickling solution is one or more of dilute sulfuric acid solution, hydrochloric acid solution or nitric acid solution.

[0061] The surface modifier is a silane coupling agent.

[0062] In the optional embodiment, the lubricant is one or more of calcium stearate lubricant, molybdenum disulfide suspension lubricant and polyethylene glycol-based nanolubricant.

[0063] According to another embodiment of the present application, a method for preparing pure nickel wire for braided mesh is also provided.

[0064] In the optional embodiment, the method for preparing pure nickel wire for braided mesh comprises:

[0065] S1, placing an electrolytic nickel plate in a vacuum induction furnace and heating to 1450-1500℃ to melt into a liquid state, and sequentially adding auxiliary deoxidizer, grain refiner and reinforcing agent to stir to make the composition uniform, to obtain an initial mixed product;

[0066] S2, placing the initial mixed product for 10 minutes to remove slag, and casting the mixed product after slag removal into a nickel alloy rod blank;

[0067] S3, heating the nickel alloy rod blank to 1100-1150℃ for 1 hour, using hot rolling technology to make the nickel alloy rod blank into a wire, and annealing the hot-rolled wire in a mixed gas atmosphere (the mixed gas atmosphere is a mixed gas of hydrogen and argon) for 1-2 hours, and water cooling after annealing to fix the grain structure;

[0068] In the optional embodiment, the rod blank after heat preservation is quickly transferred to the inlet of the hot rolling mill to avoid rapid temperature drop. Under the condition that the temperature is not lower than 900℃, multi-pass continuous rolling is carried out, and the reduction (i.e. thickness reduction) of each pass is controlled between 10%-20% to prevent cracks caused by excessive deformation in a single pass. The rolling speed is generally controlled within the range of 0.5-2 meters / second to ensure sufficient plastic deformation and prevent temperature drop caused by excessive speed or surface burning caused by excessive frictional heat. After multi-pass rolling, the nickel alloy rod blank is gradually rolled into a wire close to the required size, and the diameter of the wire after rolling can be controlled within the range of 6-10mm (the diameter of the wire after rolling in the present application is taken as 6mm).

[0069] S4, using multi-stage drawing technology to draw the wire to a preset diameter to obtain a nickel wire, and immersing the drawn nickel wire in an acid pickling solution to remove the surface oxide layer of the nickel wire.

[0070] In the optional embodiment, the step of drawing the wire to a preset diameter by using the multi-stage drawing technology to obtain a nickel wire and immersing the drawn nickel wire in an acid pickling solution to remove the surface oxide layer of the nickel wire comprises:

[0071] S41, using calcium stearate lubricant to draw the wire to a preset diameter (3 mm) in a rough drawing process, and using ethanol cleaning agent to remove the residual lubricant on the surface of the wire after each drawing pass;

[0072] S42, using molybdenum disulfide suspension lubricant to draw the wire to a preset diameter (1 mm) in a medium drawing process, and keeping the temperature of the wire at 80°C during the drawing process;

[0073] S43, using polyethylene glycol-based nano-lubricant to draw the wire to a preset diameter (0.1) in a fine drawing process;

[0074] S44, immersing the drawn nickel wire in an acid pickling solution for 5-10 minutes to remove the surface oxide layer of the nickel wire.

[0075] In the optional embodiment, the wire is processed by using the multi-stage drawing technology in the application, and the lubrication effect in the drawing process and the surface quality of the wire are significantly improved by selecting lubricants with different properties in different stages.

[0076] The calcium stearate lubricant is used in the rough drawing process to effectively reduce the deformation resistance and improve the drawing efficiency, and the ethanol cleaning agent is used to remove the residual lubricant on the surface after each drawing pass to avoid carbon deposition or affect the subsequent process; the molybdenum disulfide suspension lubricant is used in the medium drawing process to control the temperature of the wire at 80°C during the drawing process, further optimize the friction condition, reduce the risk of surface scratches and wire breakage, and ensure the dimensional accuracy and mechanical properties of the nickel wire; the polyethylene glycol-based nano-lubricant is used in the fine drawing process to make the surface of the finished nickel wire smoother and more delicate, and significantly improve the surface quality.

[0077] Finally, the drawn nickel wire is treated in an acid pickling solution for 5-10 minutes to completely remove the surface oxide layer and trace residues, 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 meeting the strict requirements of high-performance nickel wire for braided mesh on dimensional accuracy, surface quality and mechanical properties.

[0078] S5, immersing the nickel wire after removing the surface oxide layer in a silane coupling agent solution, and drying after immersion to form a dense protective film;

[0079] S6, performing secondary annealing on the nickel wire in a protective atmosphere (the protective atmosphere is pure argon) for 0.5-1 hour, and air cooling after annealing to obtain the finished pure nickel wire.

[0080] In the optional embodiment, the wire is rough-drawn to a preset diameter of 3 mm and a controlled compression rate of 50%; the wire is medium-drawn to a preset diameter of 1 mm and a controlled compression rate of 66%; and the wire is fine-drawn to a preset diameter of 0.1 mm and a controlled compression rate of 90%.

[0081] In the optional embodiment, the wire is rough-drawn to different preset diameters (3 mm, 1 mm, and 0.1 mm) and controlled compression rates (50%, 66%, and 90%) in the present application, so that the uniformity and stability of the drawing process are ensured by gradually reducing the diameter in stages. The high compression rate effectively avoids surface defects and internal stress concentration, ensures the dimensional accuracy, mechanical properties, and surface quality of the nickel wire, and improves the overall processability and consistency of the finished product.

[0082] The specific embodiments of the present application are further described below in conjunction with examples and comparative examples:

[0083] Example 1

[0084] (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 are selected.

[0085] (2) Melting process: 95 parts of electrolytic nickel plate are selected and placed in a vacuum induction furnace and heated to 1480℃, and 0.6 parts of auxiliary deoxidizer, 0.2 parts of grain refiner, and 0.5 parts of reinforcing agent are added in turn, and stirred uniformly to obtain an initial mixed product.

[0086] (3) Casting forming: After the initial mixed product is left for 10 minutes to remove slag, it is cast into a nickel alloy billet.

[0087] (4) Hot rolling and annealing: the nickel alloy billet is heated to 1100℃, hot-rolled, and annealed in a mixed atmosphere for 1 hour, and then water-cooled to set the crystal.

[0088] (5) Drawing and pickling: 2 parts of lubricant are selected, and the wire is drawn to 0.1 mm using a multi-stage drawing technique, and the drawn nickel wire is immersed in a pickling solution for 5 minutes to remove the surface oxide layer.

[0089] (6) Surface treatment and secondary annealing: the nickel wire with the removed oxide layer 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, and then air-cooled to obtain a pure nickel wire.

[0090] Example 2

[0091] (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 are selected.

[0092] (2) Melting process: 96 parts of electrolytic nickel plate were placed in a vacuum induction furnace and heated to 1480°C, and 0.8 parts of auxiliary deoxidizer, 0.4 parts of grain refiner and 1 part of reinforcing agent were added in turn, and stirred uniformly to obtain the initial mixed product.

[0093] (3) Casting forming: After the initial mixed product was placed for 10 minutes to remove slag, it was cast into a nickel alloy bar blank.

[0094] (4) Hot rolling and annealing: The nickel alloy bar blank was heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour, and then water-cooled to crystallize.

[0095] (5) Drawing and pickling: 3 parts of lubricant were selected, and the wire was drawn to 0.1 mm using a multi-stage drawing technique, and the drawn nickel wire was immersed in a pickling solution for 5 minutes to remove the surface oxide layer.

[0096] (6) Surface treatment and secondary annealing: The nickel wire with the removed oxide layer was immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour, and then air-cooled to obtain pure nickel wire.

[0097] Example 3

[0098] (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 were selected.

[0099] (2) Melting process: 97 parts of electrolytic nickel plate were placed in a vacuum induction furnace and heated to 1480°C, and 1 part of auxiliary deoxidizer, 0.6 parts of grain refiner and 1.5 parts of reinforcing agent were added in turn, and stirred uniformly to obtain the initial mixed product.

[0100] (3) Casting forming: After the initial mixed product was placed for 10 minutes to remove slag, it was cast into a nickel alloy bar blank.

[0101] (4) Hot rolling and annealing: The nickel alloy bar blank was heated to 1100°C, hot rolled, and annealed in a mixed atmosphere for 1 hour, and then water-cooled to crystallize.

[0102] (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, and the drawn nickel wire was immersed in a pickling solution for 5 minutes to remove the surface oxide layer.

[0103] (6) Surface treatment and secondary annealing: The nickel wire with the removed oxide layer was immersed in a silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour, and then air-cooled to obtain pure nickel wire.

[0104] Comparative Example 1

[0105] (1) Raw material preparation: Select 95 parts of electrolytic nickel plate, 2 parts of lubricant, 0.6 parts of auxiliary deoxidizer and 0.5 parts of reinforcing agent.

[0106] (2) Melting process: Select 95 parts of electrolytic nickel plate and put it into a vacuum induction furnace and heat it to 1480℃, then add 0.6 parts of auxiliary deoxidizer and 0.5 parts of reinforcing agent in turn, stir uniformly to get the initial mixed product.

[0107] (3) Casting forming: After the initial mixed product is placed for 10 minutes to remove slag, it is cast into a nickel alloy bar.

[0108] (4) Hot rolling and annealing: The nickel alloy bar is heated to 1100℃, hot rolling is carried out, and annealing is carried out in a mixed atmosphere for 1 hour, and then water cooling is carried out to fix the crystal.

[0109] (5) Drawing and pickling: Select 2 parts of lubricant, use multi-stage drawing technology to draw the wire to 0.1mm, and immerse the drawn nickel wire in pickling solution for 5 minutes to remove the surface oxide layer.

[0110] (6) Surface treatment and secondary annealing: The nickel wire without oxide layer is immersed in silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour, and then air cooled to obtain pure nickel wire.

[0111] Comparative Example 2

[0112] (1) Raw material preparation: Select 96 parts of electrolytic nickel plate, 0.4 parts of grain refiner, 3 parts of lubricant and 1 part of reinforcing agent.

[0113] (2) Melting process: Select 96 parts of electrolytic nickel plate and put it into a vacuum induction furnace and heat it to 1480℃, then add 0.4 parts of grain refiner and 1 part of reinforcing agent in turn, stir uniformly to get the initial mixed product.

[0114] (3) Casting forming: After the initial mixed product is placed for 10 minutes to remove slag, it is cast into a nickel alloy bar.

[0115] (4) Hot rolling and annealing: The nickel alloy bar is heated to 1100℃, hot rolling is carried out, and annealing is carried out in a mixed atmosphere for 1 hour, and then water cooling is carried out to fix the crystal.

[0116] (5) Drawing and pickling: Select 3 parts of lubricant, use multi-stage drawing technology to draw the wire to 0.1mm, and immerse the drawn nickel wire in pickling solution for 5 minutes to remove the surface oxide layer.

[0117] (6) Surface treatment and secondary annealing: The nickel wire without oxide layer is immersed in silane coupling agent solution, dried to form a dense protective film, and finally annealed in a protective atmosphere for 1 hour, and then air cooled to obtain pure nickel wire.

[0118] Comparative Example 3

[0119] (1) Raw material preparation: Select 97 parts of electrolytic nickel plate, 0.6 parts of grain refiner, 4 parts of lubricant and 1 part of auxiliary deoxidizer.

[0120] (2) Melting process: Select 97 parts of electrolytic nickel plate and put it into a vacuum induction furnace and heat it to 1480℃, and then add 1 part of auxiliary deoxidizer and 0.6 parts of grain refiner in turn, and stir uniformly to obtain the initial mixed product.

[0121] (3) Casting forming: After the initial mixed product is placed for 10 minutes to remove slag, it is cast into a nickel alloy bar.

[0122] (4) Hot rolling and annealing: The nickel alloy bar is heated to 1100℃, hot rolled and annealed in a mixed atmosphere for 1 hour, and then water cooled to crystallize.

[0123] (5) Drawing and pickling: Select 4 parts of lubricant, use multi-stage drawing technology to draw the wire to 0.1mm, and immerse the drawn nickel wire in pickling solution for 5 minutes to remove the surface oxide layer.

[0124] (6) Surface treatment and secondary annealing: The nickel wire with the removed oxide layer 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, and then air cooled to obtain pure nickel wire.

[0125] Table 1: Performance comparison table of each example and comparative example

[0126]

[0127] The present application optimizes the melting, hot rolling, drawing and surface treatment process by reasonably matching the electrolytic nickel plate, grain refiner, auxiliary deoxidizer, lubricant and reinforcing agent, and significantly improves the comprehensive performance of the pure nickel wire. As can be seen from Table 1, the pure nickel wire prepared in Examples 1-3 is significantly better than Comparative Examples 1-3 (elongation 32%-33.5%, tensile strength 365-380MPa, and reduction of area 37.2%-40.3%) in key indicators such as elongation (38.4%-40.2%), tensile strength (410-430MPa) and reduction of area (45.1%-47%), indicating that the preparation method of the present application effectively improves the plasticity and mechanical properties of the pure nickel wire, making it more suitable for high requirement of braided mesh application.

[0128] The present application 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 application is limited only by the appended claims.

Claims

1. A pure nickel wire for weaving mesh, characterized in that, This pure nickel wire is composed of the following parts by weight of raw materials: 95-97 electrolytic nickel plates; Grain refiner 0.2-0.6 parts; Surface treatment agent 3.1-5.5 parts; 2-4 parts lubricant; 0.6-1 part of auxiliary deoxidizer; 0.5-1.5 parts of reinforcing agent; The grain refiner is composed of the following raw materials in parts by weight: 0.1-0.4 parts titanium powder, 0.05-0.1 parts amorphous boron powder, and 0.05-0.1 parts yttrium nickel master alloy; The surface treatment agent is composed of the following raw materials in parts by weight: 2-3 parts pickling solution, 1-2 parts ethanol cleaning agent, and 0.1-0.5 parts surface modifier; 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; The method for preparing the pure nickel wire for the braided mesh includes: S1. Place the electrolytic nickel plate in a vacuum induction furnace and heat it to 1450-1500℃ to melt it into a liquid state. Then, add the auxiliary deoxidizer, grain refiner and reinforcing agent in sequence and stir to make the composition uniform to obtain the initial mixed product. S2. Let the initial mixture stand for 10 minutes to remove slag, and then cast the slag-removed mixture into nickel alloy billets. S3. Heat the nickel alloy billet to 1100-1150℃ and hold for 1 hour. Use hot rolling technology to make the nickel alloy billet into wire. Anneal the hot-rolled wire in a mixed atmosphere for 1-2 hours. After annealing, water cool to fix the grain structure. S4. Using multi-stage drawing technology, the wire is drawn to a preset diameter to obtain nickel wire, and the drawn nickel wire is immersed in pickling solution to remove the surface oxide layer of the nickel wire. S5. The nickel wire after removing the surface oxide layer is immersed in a silane coupling agent solution, and then dried to form a dense protective film. S6. The nickel wire is annealed for 0.5-1 hour in a protective atmosphere. After annealing, it is air-cooled to obtain the finished pure nickel wire.

2. The pure nickel wire for weaving mesh according to claim 1, characterized in that, The electrolytic nickel plate has a nickel content of ≥99.9% and an impurity content of ≤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 weaving mesh according to claim 1, characterized in that, The lubricant is one or more of the following: calcium stearate lubricant, molybdenum disulfide suspension lubricant, and polyethylene glycol-based nano-lubricant.

4. The pure nickel wire for weaving mesh according to claim 1, characterized in that, The mixed atmosphere is a mixture of hydrogen and argon; the protective atmosphere is pure argon.

5. The pure nickel wire for weaving mesh according to claim 1, characterized in that, The process of drawing wire to a preset diameter using a multi-stage drawing technique to obtain nickel wire, and then immersing the drawn nickel wire in an acid pickling solution to remove the surface oxide layer of the nickel wire includes: S41. Using calcium stearate lubricant, the wire is coarsely drawn to the preset diameter, and after each drawing pass, the residual lubricant on the wire surface is removed using ethanol cleaning agent. S42. Using molybdenum disulfide suspension lubricant, the wire is drawn to a preset diameter, and the wire temperature is maintained at 80°C during the drawing process. S43. Using polyethylene glycol-based nano lubricant, the wire is precisely drawn to a preset diameter; S44. Immerse the drawn nickel wire in pickling solution for 5-10 minutes to remove the surface oxide layer of the nickel wire.

6. The pure nickel wire for weaving mesh according to claim 1, characterized in that, The wire diameter in the process of using hot rolling technology to produce nickel alloy rod blanks is 6mm.

7. The pure nickel wire for weaving mesh according to claim 5, characterized in that, The wire is drawn to a preset diameter of 3mm, and the compression rate is controlled at 50%. The wire is drawn to a preset diameter of 1mm, and the compression rate is controlled at 66%. The wire is precisely drawn to a preset diameter of 0.1 mm, and the compression rate is controlled at 90%.

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