A preparation method of corrosion-resistant elastic card clothing steel wire and corrosion-resistant elastic card clothing steel wire

Abstract

The present invention particularly relates to a method for preparing a corrosion-resistant elastic card clothing steel wire and the corrosion-resistant elastic card clothing steel wire, belonging to the field of textile technology, and comprising the following steps: obtaining a card clothing steel wire rod; drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire. The method for preparing the corrosion-resistant elastic card clothing steel wire can prepare a steel wire that combines strength, toughness and corrosion resistance by drawing, austenitizing and lead bath quenching, without using processes such as pickling, phosphating and galvanizing that may pollute the environment, thereby obtaining a steel wire that combines strength, toughness and corrosion resistance while combining environmental protection performance.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles, and particularly relates to a preparation method of a corrosion-resistant elastic card clothing steel wire and the corrosion-resistant elastic card clothing steel wire. Background Art

[0002] Card clothing is the core material for manufacturing and combing cotton, wool, linen, silk, chemical fiber and other fibers in the textile industry. As the surface covering of the carding machine, card clothing is divided into two categories: metal card clothing and elastic card clothing. Metal card clothing is mainly used for coarse spinning, opening, and impurity removal; elastic card clothing is mainly used for fine combing. With the requirements of high speed and high yield of carding machines and diversity of fiber colors, higher requirements are put forward for the strength and corrosion resistance of card clothing steel wire. Stainless steel card clothing steel wire has good corrosion resistance, but low strength and poor combing effect; and the pickling, phosphating, galvanizing and waste liquid in the production process of galvanized card clothing steel wire seriously pollute the environment, and there are problems such as poor flatness, poor wear resistance and high cost. Environmental protection, fine wire diameter, high strength and high corrosion resistance are still the future development trend of elastic card clothing steel wire. Summary of the invention

[0003] The purpose of the present application is to provide a method for preparing a corrosion-resistant elastic card clothing steel wire and a corrosion-resistant elastic card clothing steel wire, so as to solve the technical problem that the existing card clothing steel wire cannot take into account strength, toughness, corrosion resistance and environmental protection performance.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a method for preparing any one of the above corrosion-resistant elastic card clothing steel wires, comprising the following steps:

[0005] Obtaining card clothing steel wire rod;

[0006] The card clothing steel wire rod is drawn, austenitized and lead bath quenched to obtain the corrosion-resistant elastic card clothing steel wire.

[0007] Optionally, the austenitizing temperature is 810-900°C.

[0008] Optionally, the lead bath quenching includes primary lead bath quenching and secondary lead bath quenching, the primary lead bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2mm, and the secondary lead bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2mm.

[0009] Optionally, the temperature of the first lead bath quenching and the second lead bath quenching are both 550°C, the operating speeds of the first lead bath quenching and the second lead bath quenching are both 30-40m / min, and the operating time of the first lead bath quenching and the second lead bath quenching are both 15-20s.

[0010] Optionally, the drawing is performed in 11-13 passes, the total compression rate of the drawing is 95.2-97.3%, and the drawing speed is 500-600 m / min.

[0011] Based on the same inventive concept, an embodiment of the present invention further provides a corrosion-resistant elastic card clothing steel wire, which is prepared by any one of the above-mentioned methods for preparing a corrosion-resistant elastic card clothing steel wire. The chemical composition of the steel wire includes, by mass percentage:

[0012] C: 0.63-0.70%, Si: 0.10-0.30%, Mn: 0.60-0.90%, P: ≤ 0.017%, S: ≤ 0.017%, Ni: 1-3%, and the rest are Fe and unavoidable impurities.

[0013] Optionally, the chemical composition of the steel wire includes, by mass percentage: C: 0.65-0.68%, Si: 0.15-0.25%, Ni: 1.4-2.5%.

[0014] Optionally, the metallographic structure of the steel wire comprises, by mass percentage, 95-98% troostite and 2-5% pearlite.

[0015] Optionally, the interlamellar spacing of the troostite is 65-80 nm.

[0016] Optionally, the carbide size in the troostite is ≤0.3 μm.

[0017] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] A method for preparing a corrosion-resistant elastic card clothing steel wire provided in an embodiment of the present invention comprises the following steps: obtaining a card clothing steel wire rod; drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire. The method for preparing the corrosion-resistant elastic card clothing steel wire can prepare a steel wire having both strength and toughness and corrosion resistance by drawing, austenitizing and lead bath quenching, without using processes such as pickling, phosphating and galvanizing that may pollute the environment, thereby obtaining a steel wire having both strength and toughness and corrosion resistance while taking into account environmental performance.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a flow chart of a method for preparing a corrosion-resistant elastic card clothing steel wire provided by an embodiment of the present invention;

[0022] Figure 2 It is the isothermal microstructure transformation curve (TTT) of steel wire at 800℃ and 900℃;

[0023] Figure 3 is the metallographic structure diagram of the steel wire provided in Comparative Example 3;

[0024] Figure 4 It is the troostite structure of the steel wire provided in Example 5 of the present invention;

[0025] Figure 5 This is the carbide structure in the troostite of the steel wire provided in Comparative Example 1. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with specific implementations and examples, and the advantages and various effects of the present invention will be more clearly presented. It should be understood by those skilled in the art that these specific implementations and examples are used to illustrate the present invention, rather than to limit the present invention.

[0027] Throughout the specification, unless otherwise specifically stated, the terms used herein should be understood as meanings commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. If there is a conflict, the present specification takes precedence. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention. For example, room temperature can refer to a temperature within the range of 10 to 35°C.

[0028] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0029] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0030] According to a typical embodiment of the present invention, a method for preparing a corrosion-resistant elastic card clothing steel wire is provided, comprising the following steps:

[0031] S1. Obtain card clothing steel wire rod.

[0032] Specifically: the existing card clothing steel wire rods meeting the above-mentioned composition can be selected, or molten steel can be smelted according to the corresponding end point composition, and the card clothing steel wire rods can be obtained through casting, rolling and other processes.

[0033] S2. Drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire.

[0034] Overall, the method for preparing the corrosion-resistant elastic card clothing steel wire can prepare the steel wire having both strength and toughness and corrosion resistance by means of drawing, austenitizing and lead bath quenching, without adopting processes such as pickling, phosphating and galvanizing that may pollute the environment, thereby obtaining the steel wire having both strength and toughness and corrosion resistance while taking into account environmental protection performance.

[0035] As an optional embodiment, the austenitizing temperature is 810-900°C.

[0036] The mechanism for controlling the above temperature range is that the mass percentage of Ni, Cr and Mo in the steel wire is relatively high, which directly affects the transformation characteristics of the heat treatment of the steel wire, causing the transformation C curve to move downward, the nose point temperature to decrease and the incubation period to increase, thereby changing the heat treatment structure. The austenitizing temperature needs to be controlled at 810-900°C to obtain the best heat treatment structure. When the austenitizing temperature is lower than 810°C, there are problems of insufficient dissolution of alloy elements and insufficient recovery of the drawing deformation process; when the austenitizing temperature is higher than 900°C, the incubation period of steel structure transformation increases significantly, and the complete transformation of the sorbite structure cannot be completed.

[0037] As an optional embodiment, the lead bath quenching includes primary lead bath quenching and secondary lead bath quenching, the primary lead bath quenching is carried out when the card clothing steel wire rod is drawn to φ3.0-φ3.2mm, and the secondary lead bath quenching is carried out when the card clothing steel wire rod is drawn to φ0.9-φ1.2mm.

[0038] The reason for the two lead bath quenching is that: when the card clothing steel wire rod is drawn to φ3.0-φ3.2mm, a lead bath treatment is carried out to achieve the lead bath treatment tissue recovery of the drawn fiber structure, which is conducive to the further deep drawing; when φ3.0-φ3.2mm is further drawn to the middle wire of φ0.9-φ1.2mm, a secondary lead bath heat treatment is used to recover the drawn fiber structure.

[0039] Furthermore, the operating speeds of the first lead bath quenching and the second lead bath quenching are both 30-40 m / min, and the operating time of the first lead bath quenching and the second lead bath quenching are both 15-20 s.

[0040] The mechanism for controlling the above numerical range is that the mass percentage of Ni, Cr and Mo in the steel wire is relatively high, which directly affects the transformation characteristics of the heat treatment of the steel wire, causing the transformation C curve to move downward, the nose point temperature to decrease and the incubation period to increase, thereby changing the heat treatment organization. It is necessary to control the austenitizing temperature while controlling the running speed and running time of the lead bath quenching to match each other in order to obtain the best heat treatment organization. When the lead bath quenching time is less than 15s, the troostite organization is not fully transformed, martensite will appear in the steel, and the wire will break seriously during drawing; when the lead bath quenching time is greater than 20s, the carbides in the troostite will coarsen, seriously affecting the drawing performance of the steel wire.

[0041] As an optional implementation, the drawing is performed in 11-13 passes, the total compression rate of the drawing is 95.2-97.3%, and the drawing speed is 500-600 m / min.

[0042] The mechanism for controlling the above numerical range is: 11-13 drawing passes and 500-600m / min are designed according to the drawing performance of the material. If the drawing passes are too few, higher requirements are put forward for the drawing performance of the material, and the wire breakage rate will be greatly increased; similarly, when the drawing speed is greater than 500-600m / min, the wire breakage rate will be greatly increased. On the contrary, when the drawing passes are too many and the drawing speed is less than 500-600m / min, the production efficiency is affected.

[0043] According to another typical embodiment of the present invention, there is provided a corrosion-resistant elastic card clothing steel wire, which is prepared by any one of the above preparation methods, and the chemical composition of the steel wire comprises, by mass percentage:

[0044] C: 0.63-0.70%, Si: 0.10-0.30%, Mn: 0.60-0.90%, P: ≤ 0.017%, S: ≤ 0.017%, Ni: 1-3%, and the rest are Fe and unavoidable impurities.

[0045] On the whole, the corrosion-resistant elastic needle cloth steel wire effectively adjusts the performance of the steel wire by adjusting the mass percentage of the above-mentioned chemical components. Specifically, on the one hand, the corrosion resistance of the steel wire is improved by increasing the mass percentage of the corrosion-resistant element Ni. At the same time, by increasing the mass percentage of C and the mass percentage of Ni, the transformation characteristics of the heat treatment of the steel wire are changed, so that the transformation C curve moves downward, the nose point temperature is reduced, and the incubation period is increased, thereby changing the heat treatment organization, and the organization is effectively transformed into troostite and pearlite. The drawing performance of the steel wire is improved by troostite, and the strength of the steel wire is improved by pearlite, so that the steel wire has both strength and toughness and corrosion resistance, and there is no need to perform pickling, phosphating and galvanizing steps, so that the steel wire has environmental protection performance.

[0046] Preferably, the chemical composition of the steel wire includes, by mass percentage: C: 0.65-0.68%, Si: 0.15-0.25%, Ni: 1.4-2.5%. The performance of the steel wire can be further improved by further optimizing the mass percentage of C and each corrosion-resistant metal.

[0047] As an optional embodiment, the metallographic structure of the steel wire comprises, by mass percentage, 95-98% troostite and 2-5% pearlite.

[0048] The mechanism for controlling the above metallographic structure and mass percentage is that when the mass percentage of troostite is 95-98%, the steel wire has good drawing performance, and the interlamellar spacing of troostite is a key indicator that determines the strength and plasticity of the steel wire after drawing.

[0049] As an optional embodiment, the interlamellar spacing of the troostite is 65-80nm.

[0050] The mechanism for controlling the above range is that the interlamellar spacing of troostite is a key indicator that determines the strength and plasticity of the steel wire after drawing. When the interlamellar spacing is greater than 80nm, the drawing strength of the steel wire after 12-13 drawing passes is lower than 200MPa, and the straight drawing process cannot be achieved.

[0051] As an optional implementation, the size of carbides in the troostite is ≤0.3 μm.

[0052] The mechanism for controlling the above range is that when the carbide size is greater than 0.3 μm, it is not conducive to wire drawing, especially it is impossible to achieve the drawing of thin wires below 0.25 mm.

[0053] The present application will be described in detail below with reference to embodiments, comparative examples and experimental data.

[0054] Example 1

[0055] This embodiment provides a method for preparing a corrosion-resistant elastic card clothing steel wire, comprising the following steps:

[0056] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0057] S2. Drawing, austenitizing and lead-bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire, wherein the lead-bath quenching includes primary lead-bath quenching and secondary lead-bath quenching, the primary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The parameters are shown in Table 1.

[0058] Table 1 Parameters in step S2 of Example 1

[0059]

[0060] This embodiment provides a corrosion-resistant elastic card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 98% troostite and 2% pearlite, the interlamellar spacing of the troostite is 65nm, and the size of carbides in the troostite is 0.15μm.

[0061] Example 2

[0062] This embodiment provides a method for preparing a corrosion-resistant elastic card clothing steel wire, comprising the following steps:

[0063] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0064] S2. Drawing, austenitizing and lead-bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire, wherein the lead-bath quenching includes primary lead-bath quenching and secondary lead-bath quenching, the primary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The parameters are shown in Table 2.

[0065] Table 2 Parameters in step S2 of Example 2

[0066]

[0067] This embodiment provides a corrosion-resistant elastic card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 95% troostite and 5% pearlite, the interlamellar spacing of the troostite is 70nm, and the size of carbides in the troostite is 0.25μm.

[0068] Example 3

[0069] This embodiment provides a method for preparing a corrosion-resistant elastic card clothing steel wire, comprising the following steps:

[0070] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0071] S2. Drawing, austenitizing and lead-bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire, wherein the lead-bath quenching includes primary lead-bath quenching and secondary lead-bath quenching, the primary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The parameters are shown in Table 3.

[0072] Table 3 Parameters in step S2 of Example 3

[0073]

[0074] This embodiment provides a corrosion-resistant elastic card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 96.8% troostite and 3.2% pearlite, the interlamellar spacing of the troostite is 68nm, and the size of carbides in the troostite is 0.20μm.

[0075] Example 4

[0076] This embodiment provides a method for preparing a corrosion-resistant elastic card clothing steel wire, comprising the following steps:

[0077] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0078] S2. Drawing, austenitizing and lead-bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire, wherein the lead-bath quenching includes primary lead-bath quenching and secondary lead-bath quenching, the primary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The parameters are shown in Table 4.

[0079] Table 4 Parameters in step S2 of Example 4

[0080]

[0081] This embodiment provides a corrosion-resistant elastic card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 98% troostite and 2% pearlite, the interlamellar spacing of the troostite is 75nm, and the size of carbides in the troostite is 0.22μm.

[0082] Example 5

[0083] This embodiment provides a method for preparing a corrosion-resistant elastic card clothing steel wire, comprising the following steps:

[0084] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0085] S2. Drawing, austenitizing and lead-bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire, wherein the lead-bath quenching includes primary lead-bath quenching and secondary lead-bath quenching, the primary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The parameters are shown in Table 5.

[0086] Table 5 Parameters in step S2 of Example 5

[0087]

[0088] This embodiment provides a corrosion-resistant elastic card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 97.5% troostite and 2.5% pearlite, the interlamellar spacing of the troostite is 74nm, and the size of carbides in the troostite is 0.18μm.

[0089] Example 6

[0090] This embodiment provides a method for preparing a corrosion-resistant elastic card clothing steel wire, comprising the following steps:

[0091] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0092] S2. Drawing, austenitizing and lead-bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire, wherein the lead-bath quenching includes primary lead-bath quenching and secondary lead-bath quenching, the primary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead-bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The parameters are shown in Table 6.

[0093] Table 6 Parameters in step S2 of Example 6

[0094]

[0095] This embodiment provides a corrosion-resistant elastic card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 95% troostite and 5% pearlite, the interlamellar spacing of the troostite is 80nm, and the size of carbides in the troostite is 0.19μm.

[0096] Comparative Example 1

[0097] This comparative example provides a method for preparing a card clothing steel wire, comprising the following steps:

[0098] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0099] S2. Drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire. The parameters are shown in Table 7.

[0100] Table 7 Parameters in step S2 of comparative example 1

[0101]

[0102] This comparative example also provides a card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 95% troostite and 5% pearlite, the interlamellar spacing of the troostite is 110nm, and the size of carbides in the troostite is 0.50μm.

[0103] Comparative Example 2

[0104] This comparative example provides a method for preparing a card clothing steel wire, comprising the following steps:

[0105] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0106] S2. Drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire. The parameters are shown in Table 8.

[0107] Table 8 Parameters in step S2 of comparative example 2

[0108]

[0109] This comparative example also provides a card clothing steel wire prepared by the above preparation method, and the metallographic structure of the steel wire is 45.5% of troostite and 54.5% of pearlite.

[0110] Comparative Example 3

[0111] This comparative example provides a method for preparing a card clothing steel wire, comprising the following steps:

[0112] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0113] S2. Drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire. The parameters are shown in Table 9.

[0114] Table 9 Parameters in step S2 of comparative example 3

[0115]

[0116] This comparative example also provides a card clothing steel wire obtained by the above preparation method, and the metallographic structure of the steel wire is 15% troostite and 85% pearlite.

[0117] Comparative Example 4

[0118] This comparative example provides a method for preparing a card clothing steel wire, comprising the following steps:

[0119] S1. According to the above chemical composition, molten steel is smelted as the end-point composition, and card clothing steel wire rod is obtained through casting, rolling and other processes.

[0120] S2. Drawing, austenitizing and lead bath quenching the card clothing steel wire rod to obtain the corrosion-resistant elastic card clothing steel wire. The parameters are shown in Table 10.

[0121] Table 10 Parameters in step S2 of comparative example 4

[0122]

[0123] This comparative example also provides a card clothing steel wire prepared by the above preparation method, the metallographic structure of the steel wire is 92% troostite and 8% pearlite, the interlamellar spacing of the troostite is 85nm, and the size of carbides in the troostite is 0.45μm.

[0124] Experimental example

[0125] The achievable fine wire diameters of the card clothing steel wires of Examples 1-6 and Comparative Examples 1-4 were tested and counted respectively, and the specific situation is shown in Table 21.

[0126] Table 21

[0127]

[0128] It can be seen from Table 1 that the achievable filament diameter of the corrosion-resistant elastic card clothing steel wires of Examples 1-6 is significantly finer than that of Comparative Examples 1-4, and they are not only corrosion-resistant, but also do not require pickling, phosphating and galvanizing, and do not generate environmental pollution such as waste liquid. Therefore, the corrosion-resistant elastic card clothing steel wire provided by the embodiments of the present invention can effectively solve the technical problem that the existing card clothing steel wire cannot take into account strength, toughness, corrosion resistance and environmental protection performance.

[0129] Attached Figure 2-5 Detailed description:

[0130] like Figure 2 As shown, it is the isothermal transformation curve (TTT) of the steel wire at 800℃ and 900℃. It can be seen from the figure that the transformation nose temperature is 850℃, the time required to complete the transformation at 850℃ is 13.5s, and the time required to complete the transformation at 950℃ is 32s.

[0131] like Figure 3 As shown, it is the metallographic structure diagram of the steel wire provided in Comparative Example 3. It can be seen from the figure that due to insufficient transformation time in the lead bath, a large area of ​​martensite structure is formed in the core of the steel wire.

[0132] like Figure 4 As shown, the troostite structure of the steel wire provided in Example 5 of the present invention is formed. As can be seen from the figure, more than 97.5% of the troostite fine lamellar structure is formed, and the lamellar spacing is 74nm.

[0133] like Figure 5As shown, it is the carbide structure in the troostite of the steel wire provided in Comparative Example 1. It can be seen from the figure that more and larger carbides appear in the structure, especially at the grain boundaries.

[0134] Finally, it should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article, or apparatus.

[0135] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0136] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for preparing a corrosion-resistant elastic card clothing steel wire, characterized in that: The steps include: Obtaining card clothing steel wire rod; The card clothing steel wire rod is drawn, austenitized and lead-bath quenched to obtain the corrosion-resistant elastic card clothing steel wire without the need for pickling and phosphating processes; The austenitizing temperature is 810-900°C, The lead bath quenching includes a primary lead bath quenching and a secondary lead bath quenching. The primary lead bath quenching is performed when the card clothing steel wire rod is drawn to φ3.0-φ3.2 mm, and the secondary lead bath quenching is performed when the card clothing steel wire rod is drawn to φ0.9-φ1.2 mm. The temperatures of the primary lead bath quenching and the secondary lead bath quenching are both 550° C., the operating speeds of the primary lead bath quenching and the secondary lead bath quenching are both 30-40 m / min, and the operating time of the primary lead bath quenching and the secondary lead bath quenching is both 15-20 s. The chemical composition of the steel wire is: C: 0.63-0.70%, Si: 0.10-0.30%, Mn: 0.60-0.90%, P: ≤ 0.017%, S: ≤ 0.017%, Ni: 1-3%, the rest is Fe and unavoidable impurities; By mass percentage, the metallographic structure of the steel wire comprises: 95-98% of troostite and 2-5% of pearlite; the interlamellar spacing of the troostite is 65-80nm; the size of carbides in the troostite is ≤0.3μm.

2. The method for preparing the corrosion-resistant elastic card clothing steel wire according to claim 1, characterized in that: The drawing is performed in 11-13 passes, the total compression rate of the drawing is 95.2-97.3%, and the drawing speed is 500-600 m / min.

3. A corrosion-resistant elastic card clothing steel wire, characterized in that: The steel wire is prepared by the method for preparing the corrosion-resistant elastic card clothing steel wire described in any one of claims 1-2.

4. The corrosion-resistant elastic card clothing steel wire according to claim 3, characterized in that: By mass percentage, the chemical composition of the steel wire includes: C: 0.65-0.68%, Si: 0.15-0.25%, Ni: 1.4-2.5%.

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