CN114733906B - Control method for defects of iron oxide skin layer-steel matrix interface void layer of high-carbon steel wire and application of control method - Google Patents
Control method for defects of iron oxide skin layer-steel matrix interface void layer of high-carbon steel wire and application of control method Download PDFInfo
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- CN114733906B CN114733906B CN202210367061.6A CN202210367061A CN114733906B CN 114733906 B CN114733906 B CN 114733906B CN 202210367061 A CN202210367061 A CN 202210367061A CN 114733906 B CN114733906 B CN 114733906B
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910000677 High-carbon steel Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 230000007547 defect Effects 0.000 title claims abstract description 28
- 239000011159 matrix material Substances 0.000 title claims abstract description 28
- 239000011800 void material Substances 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 238000009987 spinning Methods 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 44
- 238000005096 rolling process Methods 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 14
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 8
- 238000005098 hot rolling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 229910000975 Carbon steel Inorganic materials 0.000 abstract 1
- 239000010962 carbon steel Substances 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000005554 pickling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention provides a control method for defects of a high-carbon steel wire iron oxide skin layer-steel matrix interface void layer and application thereof, belonging to the technical field of steel smelting. The invention sequentially heats, dephosphorizes and hot-rolls the carbon steel wire iron oxide skin layer-steel substrate; controlling the spinning temperature and the air-cooling linear speed. The control method realizes the control of the iron oxide skin layer-matrix surface interface defect layer, improves the stripping performance of the wire rod, avoids the problems of pressing iron oxide scale grains into the surface of the wire rod, damaging the surface of a steel wire, reducing the lubricating effect and breaking the wire, improves the product quality, and has important significance for the subsequent processing performance and the improvement of the product competitiveness.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a method for controlling defects of a high-carbon steel wire iron oxide skin layer-steel substrate interface void layer and application thereof.
Background
The high-carbon steel wire is an important metal raw material for manufacturing prestressed steel strands and steel wire products with corresponding specifications and performances through a drawing process. However, the wire rod is subjected to surface treatment before drawing, and the wire rod is produced after removing iron scales on the surface of the wire rod. Due to the large deformation of drawing, the requirements on the surface quality of the wire rod are strict in addition to the internal quality. When the descaling effect of the iron scale is poor, more iron scale remains on the surface of the wire rod, and scratches the surfaces of the die and the steel wire during drawing, so that the lubricating effect is reduced, the service life of the wire drawing die is influenced, and wire breakage can be caused in severe cases.
High carbon steel wire is generally descaled by an acid pickling method. However, the treatment cost and labor cost of waste acid, waste water, waste gas and the like after acid washing are high, and environmental pollution is caused. In order to achieve the purposes of energy conservation and environmental protection, mechanical descaling is generally adopted to remove iron scales on the surface of the wire rod, and an acid pickling dephosphorization method is not used, so that the acid liquor is prevented from polluting the environment. However, mechanical phosphorus removal is generally adopted, and after repeated bending and steel brush cleaning processes, residual iron oxide scales on the surface of the wire rod are removed through a simple acid washing process. Although the amount of acid liquor used in the simple pickling process is obviously reduced compared with the ordinary pickling process, the waste acid generated after the surface treatment of the wire rod can cause certain pollution to the environment. Therefore, the scale structure is optimized, the mechanical descaling effect is improved, and the method has important significance for improving subsequent processing performance and improving environmental protection.
The scale of the high carbon steel wire is generally two-layered and contains a very small amount of Fe 2 O 3 : the inner layer is loose FeO + Fe 3 O 4 Layer of Fe on the upper layer 3 O 4 . In the cooling process after the J82B wire rod is spun, interface separation occurs in a local area due to the formation of a bubble structure, and an oxide layer-substrate surface interface gap layer is formed. A large amount of FeO layers distributed in the void layer react to generate Fe 3 O 4 And (4) crystal grains. The wire rod can lead the Fe with higher hardness to be drawn in the mechanical husking and drawing process 3 O 4 The crystal grains are pressed into the surface interface of the matrix to form spot defects, which affect the surface quality of the wire and the mechanical property of the matrix. Therefore, the method has very important significance for controlling the defects of the scale-steel matrix interface void layer of the widely used J82B wire rod, and meeting the mechanical descaling effect of downstream users.
Disclosure of Invention
The invention aims to provide a method for controlling defects of a J82B steel wire rod iron oxide skin layer-steel matrix interface void layer suitable for mechanical shelling.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for controlling defects of a high-carbon steel wire rod iron oxide skin layer-steel matrix interface void layer, which comprises the following steps of:
heating, dephosphorizing, hot rolling, spinning, roller bed processing and cooling are sequentially carried out on the iron oxide cortex layer-steel matrix of the high-carbon steel wire.
Further, the high-carbon steel wire rod in the high-carbon steel wire rod iron oxide skin-steel matrix comprises the following elements in percentage by mass: c:0.79 to 0.85 percent; si:0.20 to 0.30 percent; mn:0.70 to 0.85 percent; p is less than or equal to 0.025 percent; s is less than or equal to 0.015 percent; cr:0.19 to 0.26 percent, and the balance being iron.
Further, the thickness of the iron oxide skin layer is 14-18 mu m, and the iron oxide skin layer contains Fe 3 O 4 And FeO, fe 3 O 4 And FeO in a mass ratio of 16-20: 80 to 84.
Furthermore, the heating temperature is 1050-1150 ℃, and the heating time is 150-250 min.
Further, the dephosphorization is high-pressure water treatment, and the high-pressure is 15-20 MPa.
Further, the hot rolling treatment comprises rough rolling treatment and finish rolling treatment, wherein the temperature of the rough rolling treatment is 980-1050 ℃, and the rolled part produced by rough rolling is 65-68 mm square; the temperature of the finish rolling treatment is 900-950 ℃, and the rolled part is 26-28 mm round.
Furthermore, the spinning temperature is 890-920 ℃.
Furthermore, the linear speed of the air cooling in the roller way treatment is 50-80 m/min.
Furthermore, in the cooling process, the cooling speed of the spinning temperature of 850 ℃ is 6-8 ℃/s; the cooling speed of 850-600 ℃ is 15-18 ℃/s; the cooling speed of 600 ℃ to room temperature is 1-2 ℃/s.
The invention provides an application of a control method of defects of a high-carbon steel wire rod iron oxide skin layer-steel matrix interface void layer in mechanical shelling.
The beneficial teachings of the present invention:
according to the invention, by controlling the rolling temperature, the spinning temperature, the roller speed and the air cooling speed of the iron oxide scale wire rod on the surface of the high-carbon steel wire rod, the control on the iron oxide scale layer-matrix surface interface defect layer is realized, the stripping performance of the wire rod is improved, the problems of reduction of lubricating effect, wire breakage and the like caused by pressing iron oxide scale grains into the surface of the wire rod to damage the surface of the steel wire are avoided, the product quality is improved, and the wire rod has important significance for subsequent processing performance and product competitiveness improvement.
Compared with the prior art, the invention can ensure that the thickness of the iron scale is within 14-18 mu m and the Fe in the iron scale 3 O 4 The content is not more than 20 percent, and the iron oxide skin layer-steel matrix interface layer gap can be eliminated, thereby better meeting the requirement of mechanical phosphorus removal of customers.
Drawings
FIG. 1 is a metallographic structure surface morphology of iron scale on the surface of a high carbon steel wire rod in example 1 of the present invention;
FIG. 2 is a metallographic structure surface morphology of iron scale on the surface of the high-carbon steel wire rod in example 2 of the present invention;
FIG. 3 is a metallographic structure surface morphology diagram of iron scale on the surface of the high-carbon steel wire rod in example 3 of the present invention;
FIG. 4 is a metallographic structure surface morphology diagram of iron scale on the surface of the high-carbon steel wire rod in example 4 of the present invention;
FIG. 5 is a metallographic structure surface morphology of iron scale on a surface of a high-carbon steel wire rod according to example 5 of the present invention;
FIG. 6 is a metallographic structure surface morphology of iron scale on the surface of a high carbon steel wire rod in comparative example 1 according to the present invention;
FIG. 7 is a metallographic structure surface morphology diagram of iron scale on the surface of a high-carbon steel wire rod in comparative example 2 in accordance with the present invention.
Detailed Description
The invention provides a method for controlling defects of a high-carbon steel wire rod iron oxide cortex-steel matrix interface void layer, which comprises the following steps:
heating, dephosphorization, hot rolling, spinning, roller bed treatment and cooling are sequentially carried out on the high-carbon steel wire iron oxide skin layer-steel substrate.
In the invention, the high-carbon steel wire rod in the iron oxide skin layer-steel matrix of the high-carbon steel wire rod comprises the following elements in percentage by mass: c:0.79 to 0.85 percent; si:0.20 to 0.30 percent; mn:0.70 to 0.85 percent; p is less than or equal to 0.025 percent; s is less than or equal to 0.015 percent; cr:0.19 to 0.26%, the balance being iron, preferably C:0.81 to 0.83 percent; si:0.22 to 0.28 percent; mn:0.72 to 0.80 percent; p is less than or equal to 0.020%; s is less than or equal to 0.010 percent; cr:0.20 to 0.24 percent, and the balance being iron.
In the present invention, the thickness of the iron oxide scale layer is 14 to 18 μm, preferably 15 to 17 μm, and more preferably 16 μm.
In the present invention, the iron oxide scale layer contains Fe 3 O 4 And FeO, fe 3 O 4 The mass ratio of FeO to FeO is 16-20: 80 to 84, preferably 17 to 19:81 to 83.
In the invention, the heating temperature is 1050-1150 ℃, and the heating time is 150-250 min; preferably, the heating temperature is 1100 ℃, and the heating time is 200min.
In the invention, the dephosphorization is high-pressure water treatment, and the high-pressure is 15-20 MPa, preferably 15MPa.
In the present invention, the hot rolling treatment includes a rough rolling treatment and a finish rolling treatment, and the temperature of the rough rolling treatment is 980 to 1050 ℃, preferably 990 to 1000 ℃.
In the present invention, the rolled product obtained by rough rolling is 65 to 68mm square, preferably 66 to 67mm square.
In the invention, the temperature of the finish rolling treatment is 900-950 ℃, preferably 920-940 ℃.
In the present invention, the rolled product obtained by the finish rolling is 26 to 28mm round, preferably 27mm round.
In the present invention, the spinning temperature is 890 to 920 ℃, preferably 900 to 910 ℃.
In the invention, the linear speed of the air cooling in the roller way treatment is 50-80 m/min; preferably, the air cooling linear speed of the spinning temperature to 850 ℃ is 60m/min, the air cooling linear speed of the spinning temperature to 850 ℃ is 50m/min, and the air cooling linear speed of the spinning temperature to the room temperature is 75m/min.
In the invention, in the cooling process, the cooling speed of the spinning temperature of 850 ℃ is 6-8 ℃/s; the cooling speed of 850-600 ℃ is 15-18 ℃/s; the cooling speed of 600 ℃ to room temperature is 1 to 2 ℃/s; preferably, the cooling speed of the spinning temperature to 850 ℃ is 7 ℃/s; the cooling speed of 850-600 ℃ is 16 ℃/s; the cooling rate of 600 ℃ to room temperature is 2 ℃/s.
The invention provides an application of a control method of defects of a high-carbon steel wire rod iron oxide skin layer-steel matrix interface void layer in mechanical shelling.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Examples
The method comprises the following steps of:
1) Heating the high-carbon steel wire iron oxide skin layer-steel substrate at 1050-1150 ℃ for 150-250 min.
2) And carrying out dephosphorization treatment on the surface of the substrate by adopting high-pressure water, wherein the pressure is 15MPa.
3) Hot rolling: respectively carrying out rough rolling and finish rolling treatment at 980-1050 ℃ and 900-950 ℃, and obtaining a piece with a square diameter of 66mm by rough rolling and a piece with a round diameter of 27mm by finish rolling.
4) Spinning temperature and roller bed treatment: controlling the spinning temperature to be 890-920 ℃, wherein the air cooling linear speed at the spinning temperature of 850-850 ℃ is 60m/min, the air cooling linear speed at the temperature of 850-600 ℃ is 50m/min, and the air cooling linear speed at the temperature of 600-room temperature is 75m/min in roller bed treatment.
5) Stelmor line cooling process: the cooling speed of the spinning temperature of 850 ℃ is 6-8 ℃/s; the cooling speed of 850-600 ℃ is 15-18 ℃/s; the cooling speed of 600 ℃ to room temperature is 1 to 2 ℃/s.
The high carbon steel wire rod iron oxide skin-steel substrate compositions of examples 1 to 5 and comparative examples 1 to 2 are as follows in table 1;
the processing parameters of examples 1 to 5 and comparative examples 1 to 2 are shown in Table 2 below;
the results of testing the substrates treated in examples 1 to 5 of the present invention and comparative examples 1 to 2 are shown in table 3 below.
TABLE 1 iron oxide layer-Steel substrate composition of high-carbon steel wire rods of examples 1 to 5 and comparative examples 1 to 2
TABLE 2 treatment Process parameter tables for examples 1 to 5 and comparative examples 1 to 2
Table 3 table for measuring scale of matrix in examples 1 to 5 and comparative examples 1 to 2
As can be seen from the drawings: FIG. 1 shows that the surface oxide layer has a complete structure, the roughness of the oxide layer-matrix interface is small, and no obvious interface defect layer is seen; FIG. 2 shows that the surface oxide layer has a complete structure, the oxide layer-substrate interface is flat, and no obvious interface defect layer is seen; FIG. 3 shows that the oxide layer on the surface is slightly damaged, the oxide layer-substrate interface is flat, and no obvious interface defect layer is observed; FIG. 4 shows that the surface oxide layer has a complete structure, the roughness of the oxide layer-matrix interface is small, and no obvious continuous interface defect is seenA sink layer; FIG. 5 shows that the oxide layer on the surface is slightly damaged, the roughness of the oxide layer-matrix interface is small, and no obvious continuous interface defect layer is seen; FIG. 6 shows a continuous layer of apparent interface defects with complete structure of the oxide layer on the surface and high roughness of the oxide layer-substrate interface; FIG. 7 shows a continuous layer of apparent interface defects, with complete structure of the surface oxide layer, and small roughness of the oxide layer-substrate interface. From the above embodiments, the invention provides a method for controlling defects of a scale layer-steel matrix interface void layer of a high-carbon steel wire rod and an application thereof. As can be seen from Table 3, when the heating time, heating temperature, hot rolling temperature and spinning temperature were substantially equivalent, the thickness of the scale of the wire rod obtained at a spinning temperature of 910 ℃ was 13.02. Mu.m, and the scale layer-matrix surface defect layer phenomenon occurred, by controlling the roller speed and the air volume. When the other processes are almost the same, and only the spinning temperature is increased to 940 ℃, the phenomenon of iron oxide scale layer-matrix surface defect layer occurs, and Fe 3 O 4 The occupation ratio is too high, and the requirements of users cannot be met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for controlling defects of a high-carbon steel wire rod iron oxide skin layer-steel substrate interface void layer is characterized by comprising the following steps:
heating, descaling, hot rolling, spinning, roller bed treatment and cooling are sequentially carried out on the high-carbon steel wire iron oxide skin layer-steel substrate;
the thickness of the iron oxide skin layer is 14 to 18 mu m, and the iron oxide skin layer contains Fe 3 O 4 And FeO, fe 3 O 4 The mass ratio of FeO to FeO is 16 to 20:80 to 84;
the descaling is high-pressure water treatment, and the high-pressure is 15 to 20MPa;
in the cooling process, the cooling speed of the spinning temperature of 850 ℃ is 6-8 ℃/s; the cooling speed is 15 to 18 ℃/s when the temperature is less than 850 ℃ and more than or equal to 600 ℃; the cooling speed of less than 600 ℃ and more than or equal to the room temperature is 1 to 2 ℃/s;
the high-carbon steel wire rod comprises the following elements in percentage by mass: c:0.79 to 0.85 percent; si:0.20 to 0.30 percent; mn:0.70 to 0.85 percent; p is less than or equal to 0.025 percent; s is less than or equal to 0.015 percent; cr:0.19 to 0.26 percent, and the balance being iron.
2. The method for controlling the defects of the iron oxide skin layer-steel matrix interface void layer of the high-carbon steel wire rod as claimed in claim 1, wherein the heating temperature is 1050 to 1150 ℃, and the heating time is 150 to 250min.
3. The method for controlling the defects of the iron oxide skin layer-steel matrix interface void layer of the high-carbon steel wire rod as claimed in claim 2, wherein the hot rolling treatment comprises rough rolling treatment and finish rolling treatment, the temperature of the rough rolling treatment is 980-1050 ℃, and the rolled piece after rough rolling is 65-68mm square; the temperature of the finish rolling treatment is 900 to 950 ℃, and the rolled piece after finish rolling is 26 to 28mm circle.
4. The method for controlling the defects of the iron oxide skin layer-steel matrix interface void layer of the high-carbon steel wire rod as claimed in claim 3, wherein the spinning temperature is 890 to 920 ℃.
5. The method for controlling the defects of the high-carbon steel wire iron oxide skin layer-steel matrix interface void layer as claimed in claim 4, wherein the linear speed of the air cooling in the roller way treatment is 50 to 80m/min.
6. Use of the control method according to any one of claims 1 to 5 in mechanical shelling.
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