CN113414236A - Control method for improving mechanical stripping rate of scale of 80-grade cord steel - Google Patents

Control method for improving mechanical stripping rate of scale of 80-grade cord steel Download PDF

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Publication number
CN113414236A
CN113414236A CN202110706898.4A CN202110706898A CN113414236A CN 113414236 A CN113414236 A CN 113414236A CN 202110706898 A CN202110706898 A CN 202110706898A CN 113414236 A CN113414236 A CN 113414236A
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scale
temperature
equal
wire rod
percent
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CN113414236B (en
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王鲁义
刘荣
王淼
王薛鹏
纪文杰
马伟
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Jiangsu Yonggang Group Co Ltd
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Jiangsu Yonggang Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • 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
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    • 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
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    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • 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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
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    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B2045/0212—Cooling devices, e.g. using gaseous coolants using gaseous coolants
    • 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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  • Engineering & Computer Science (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a control method for improving mechanical stripping rate of 80-grade cord steel scale, which relates to the technical field of high-speed wire rod production and comprises the following steps: heating and descaling a steel billet: the temperature of the soaking section is 1140-1200 ℃, and the heating time is more than or equal to 2 h; descaling with high-pressure water, wherein the descaling pressure is more than or equal to 14 MPa; billet rolling and spinning: the initial rolling temperature is 1070-1120 ℃; the finish rolling comprises a first finish rolling and a second finish rolling, wherein the temperature of the first finish rolling is 890-930 ℃; the second finish rolling temperature is 900-950 ℃; the spinning temperature is 920-950 ℃; and (3) cooling: air cooling and air cooling. The primary scale is removed by high-temperature rolling and high-pressure water descaling, and the ideal thickness and structure of the wire rod scale are obtained by proper spinning temperature, roller speed, fan air quantity and opening of a heat-insulating cover, and the structure and performance of the wire rod scale are not influenced.

Description

Control method for improving mechanical stripping rate of scale of 80-grade cord steel
Technical Field
The invention relates to the technical field of high-speed wire production, in particular to a control method for improving the mechanical stripping rate of an oxide scale of 80-grade cord steel.
Background
The mechanical stripping performance of the scale of the 80-grade cord steel wire rod of the conventional control method is poor, the mechanical stripping removal rate of the scale is less than 85%, the scale is easy to remain on the surface of the steel wire, the uniformity of boron coating on the surface of the steel wire is influenced, the wire drawing performance is reduced, the steel wire is easy to shine, and the consumption of a wire drawing die is increased.
Disclosure of Invention
In order to improve the mechanical stripping rate of the scale, solve the problem of scale residue on the surface of a steel wire, improve the wire drawing performance and reduce the consumption of a wire drawing die, the invention provides a control method for improving the mechanical stripping rate of the scale of 80-grade cord steel, which removes the primary scale through high-temperature rolling and high-pressure water descaling, obtains ideal thickness and structure of the scale of a wire rod through proper spinning temperature, roller speed, air quantity of a fan and opening of a heat-insulating cover, and does not influence the structure and performance of the wire rod.
The present invention achieves the above-described object by the following technical means.
A control method for improving mechanical stripping rate of an oxide scale of 80-grade cord steel comprises the following steps:
heating and descaling a steel billet: the temperature of the soaking section is 1140-1200 ℃, and the heating time is more than or equal to 2 h; descaling with high-pressure water, wherein the descaling pressure is more than or equal to 14 MPa;
billet rolling and spinning: the initial rolling temperature is 1070-1120 ℃; the finish rolling comprises a first finish rolling and a second finish rolling, wherein the temperature of the first finish rolling is 890-930 ℃; the second finish rolling temperature is 900-950 ℃; the spinning temperature is 920-950 ℃;
and (3) cooling: air cooling and air cooling.
Further, the steel billet comprises the following chemical components in percentage by weight: c: 0.80-0.85%, Mn: 0.40-0.60%, Si: 0.15-0.30%, Cr: less than or equal to 0.05 percent, less than or equal to 0.015 percent, less than or equal to 0.010 percent of S, less than or equal to 0.05 percent of Ni, less than or equal to 0.05 percent of Cu, less than or equal to 0.03 percent of Mo, less than or equal to 0.0020 percent of Al, less than or equal to 0.0010 percent of Ti, less than or equal to 0.0020 percent of [ O ] and less than or equal to 0.0050 percent of [ N ].
Further, the finished product speed of the wire rod in the wire laying machine is 100-106 m/s.
Further, the wire rod obtained after the billet steel is processed by the wire laying machine is conveyed to an air cooling channel through a roller way to be air-cooled, and in the air cooling process, the speed of the roller way is 0.80-1.18 m/s.
Further, the temperature of the wire rod obtained after the wire feeding machine is processed is reduced to 300-340 ℃ after air cooling.
Furthermore, intermediate rolling exists between the initial rolling and the finish rolling, and the intermediate rolling temperature is 1000-1050 ℃.
Further, the descaling time is 1-3 s.
Furthermore, the FeO content in the iron scale in the wire rod is more than 80 percent, and the outermost layer of the surface of the wire rod is free of Fe2O3。
Furthermore, the thickness of the iron scale of the wire rod is 14-16 mu m.
The invention has the following beneficial effects:
(1) the thickness of the iron scale of the wire rod is increased to 14-16 mu m from the original 8-10 mu m, the proportion of FeO in the iron scale is increased to more than 80% from the original 70%, and no Fe exists in the outermost layer of the surface of the wire rod2O3The steel wire rod is tested by torsion, the iron scale of the new control method has no residue, the mechanical property and the structure of the steel wire rod meet the standard requirements, abnormal structures such as network grain boundary cementite and the like are not found, and the mechanical property is also improved to a certain extent.
(2) When the surface of the wire rod is pretreated, the mechanical stripping rate of the iron scale is up to more than 95%, no residue exists on the surface after online acid washing, the surface of the steel wire is coated with boron to be covered completely, the wire drawing performance is greatly improved, the surface quality grade of the steel wire is improved, and the consumption of a die is obviously improved.
(3) The method of the invention obtains relatively ideal thickness and structure of the iron scale, the mechanical property and the structure of the wire rod meet the standard requirements, the mechanical stripping rate is up to more than 95 percent, the iron scale after on-line acid cleaning has no residue, the steel wire coating effect is greatly improved, and the wire drawing performance is improved.
Detailed Description
A control method for improving mechanical stripping rate of an oxide scale of 80-grade cord steel comprises the following steps:
1) firstly, selecting a steel billet: the 80-grade cord steel comprises the following chemical components in percentage by weight: 0.80-0.85%, Mn: 0.40-0.60%, Si: 0.15-0.30%, Cr: less than or equal to 0.05 percent, less than or equal to 0.015 percent, less than or equal to 0.010 percent of S, less than or equal to 0.05 percent of Ni, less than or equal to 0.05 percent of Cu, less than or equal to 0.03 percent of Mo, less than or equal to 0.0020 percent of Al, less than or equal to 0.0010 percent of Ti, less than or equal to 0.0020 percent of [ O ] and less than or equal to 0.0050 percent of [ N ].
2) Heating and descaling a steel billet: because the 80-grade cord steel belongs to hypereutectoid steel and is easy to generate reticular grain boundary cementite, high-temperature heating is adopted, the temperature of a soaking section is 1140-1200 ℃, the in-furnace time is not less than 2 hours, segregation is further improved through high-temperature diffusion, and the wire rod abnormal structure is guaranteed to avoid the occurrence of a subsequent cooling control procedure due to the reduction of the air volume of a fan; in addition, descaling is carried out through high-pressure water, the descaling pressure is more than or equal to 14MPa, and primary scale is thoroughly removed;
3) billet rolling and spinning: the initial rolling temperature is 1070-1120 ℃, the temperature of entering an NTM (finishing mill) is 890-930 ℃, the temperature of entering an RSM (reducing sizing mill) is 900-950 ℃, the spinning temperature is 920-950 ℃, the finished product speed is 100-106 m/s, and the spinning temperature is properly increased to thicken the iron scale of the wire rod through temperature-controlled rolling;
4) and (3) controlling cooling: the roller speed is 0.80-1.18 m/s, and air cooling is carried out. Specifically, 1# -16# fans and a protective cover are adopted, wherein the air volume (%) of 1# -8# fans is 0/85/85/85/60/50/50, and 9# -16# fans are turned off, wherein the air volume of each fan is 200000m3The first typhoon is turned off, so that the retention time of the wire rod in the high-temperature section is prolonged, because the surface oxidation rate of the wire rod is increased sharply along with the increase of the temperature in the high-temperature section of 800-950 ℃, the thickness of the iron scale is increased remarkably, and the iron scale generated in the section is mainly FeO; the 1# to 10# heat preservation cover is opened, and the 11# to 16# heat preservation cover is closed, so that the internal tissue stress is removed, the integrity of iron scales on the surface of the wire rod is kept, and the iron scales are prevented from being exploded and falling off.
The invention has the following beneficial effects:
(1) the thickness of the iron scale of the wire rod is increased to 14-16 mu m from the original 8-10 mu m, the proportion of FeO in the iron scale is increased to more than 80% from the original 70%, and no Fe exists in the outermost layer of the surface of the wire rod2O3After torsion test, the iron scale of the wire rod is free from residue, the mechanical property and the structure of the YLX80A wire rod meet the standard requirements, abnormal structures such as a net-shaped grain boundary cementite and the like are not found, and the mechanical property is improved to a certain extent.
(2) When the surface of the wire rod is pretreated, the mechanical stripping rate of the iron scale is up to more than 95%, no residue exists on the surface after online acid washing, the surface of the steel wire is coated with boron to be covered completely, the wire drawing performance is greatly improved, the surface quality grade of the steel wire is improved, and the consumption of a die is obviously improved.
Example 1
1) Firstly, selecting a steel billet: the 80-grade cord steel comprises the following chemical components in percentage by weight: 0.80%, Mn: 0.40%, Si: 0.30%, Cr: 0.05%, P: 0.010%, S: 0.010%, Ni: 0.05%, Cu: 0.05%, Mo: 0.03%, Al: 0.0010%, Ti: 0.0010%, [ O ]: 0.0020% and [ N ] 0.0010%.
2) Heating and descaling a steel billet: the temperature of the soaking section is 1140 ℃, the furnace time is 3 hours, the segregation is further improved through high-temperature diffusion, high-pressure water descaling is carried out, the descaling pressure is 15MPa, and primary scale is thoroughly removed;
3) billet rolling and spinning: the initial rolling temperature is 1070 ℃, the temperature of an NTM (finishing mill) is 930 ℃, the temperature of an RSM (reducing sizing mill) is 900 ℃, the spinning temperature is 920 ℃, the finished product speed is 100m/s, and the spinning temperature is properly increased by controlling the temperature and rolling to thicken the scale of the wire rod;
4) and (3) controlling cooling: the roller speed is 0.800m/s, and air cooling is carried out.
The thickness of the iron scale of the wire rod obtained in the embodiment 1 is increased from 8-10 mu m to 16 mu m, the FeO content in the iron scale is increased from 70% to 82%, and the outermost layer of the surface of the wire rod is free of Fe2O3The steel wire rod is tested by torsion, the iron scale of the new control method has no residue, the mechanical property and the structure of the steel wire rod meet the standard requirements, abnormal structures such as network grain boundary cementite and the like are not found, and the mechanical property is also improved to a certain extent.
(2) When the surface of the wire rod is pretreated, the mechanical stripping rate of the iron scale is as high as 95%, no residue exists on the surface after on-line acid washing, the surface of the steel wire is completely covered by boron coating, the wire drawing performance is greatly improved, the surface quality grade of the steel wire is improved, and the consumption of a die is obviously improved.
Example 2
1) Firstly, selecting a steel billet: the 80-grade cord steel comprises the following chemical components in percentage by weight: 0.85%, Mn: 0.5%, Si: 0.15%, Cr: 0.01%, P: 0.015, S: 0.005%, Ni: 0.01%, Cu: 0.04%, Mo: 0.0: 2%, Al: 0.0020%, Ti: 0.0005%, [ O ]: 0.00: 10% and [ N ]: 0.0050%.
2) Heating and descaling a steel billet: because the 80-grade cord steel belongs to hypereutectoid steel and is easy to generate reticular grain boundary cementite, high-temperature heating is adopted, the temperature of a soaking section is set to be 1200 ℃, the furnace time is not less than 2 hours, the segregation is further improved through high-temperature diffusion, and the wire rod abnormal structure is guaranteed to avoid the occurrence of the subsequent cooling control process due to the reduction of the air volume of a fan; in addition, descaling is carried out through high-pressure water, and the descaling pressure is 14MPa, so that primary scale is thoroughly removed;
3) billet rolling and spinning: the initial rolling temperature is 1120 ℃, the temperature of entering an NTM (finishing mill) is 890 ℃, the temperature of entering an RSM (reducing sizing mill) is 920 ℃, the spinning temperature is 935 ℃, the finished product speed is 106m/s, and the spinning temperature is properly increased to thicken the scale of the wire rod iron oxide through temperature-controlled rolling;
4) and (3) controlling cooling: the roller speed is 1.18m/s, and air cooling is carried out.
The thickness of the scale of the wire rod obtained in the example 2 is increased from 8-10 mu m to 14 mu m, the FeO content in the scale is increased from 70% to 83%, and the outermost layer of the surface of the wire rod is free of Fe2O3The steel wire rod is subjected to torsion test, the iron scale of the new control method has no residue, the mechanical property and the structure of the steel wire rod meet the standard requirements, abnormal structures such as a reticular grain boundary cementite and the like are not found, and the mechanical property is also improved to a certain extent; when the surface of the wire rod is pretreated, the mechanical stripping rate of the iron scale is up to 96%, no residue exists on the surface after online pickling, the surface of the steel wire is completely covered by boron coating, the wire drawing performance is greatly improved, the surface quality grade of the steel wire is improved, and the consumption of a die is obviously improved.
Example 3
1) Firstly, selecting a steel billet: the 80-grade cord steel comprises the following chemical components in percentage by weight: 0.825%, Mn: 0.60%, Si: 0.25%, Cr: 0.005%, P: 0.0: 05%, S: 0.002%, Ni: 0.008%, Cu: 0.0: 1%, Mo: 0.001%, Al: 0.0005%, Ti: 0.0004%, [ O ]: 0.0008% and [ N ]: 0.00: 35%.
2) Heating and descaling a steel billet: because the 80-grade cord steel belongs to hypereutectoid steel and is easy to generate reticular grain boundary cementite, the 80-grade cord steel is heated at high temperature, the temperature of a soaking section is 1170 ℃, the furnace time is 2.5 hours, the segregation is further improved through high-temperature diffusion, and the wire rod abnormal structure caused by the reduction of the air volume of a fan in the subsequent cooling control process is guaranteed; in addition, the primary scale is thoroughly removed by high-pressure water descaling with the descaling pressure of 16 MPa;
3) billet rolling and spinning: the initial rolling temperature is 1095 ℃, the temperature of the steel wire rod entering an NTM (finishing mill) is 910 ℃, the temperature of the steel wire rod entering an RSM (reducing sizing mill) is 950 ℃, the spinning temperature is 950 ℃, the finished product speed is 103m/s, and the spinning temperature is properly increased to thicken the scale of the steel wire rod by temperature-controlled rolling;
4) and (3) controlling cooling: the roller speed is 1m/s, and air cooling is carried out.
The thickness of the scale of the wire rod obtained in the embodiment 3 is increased from 8-10 mu m to 15 mu m, the FeO content in the scale is increased from 70% to 80.5%, and the outermost layer of the surface of the wire rod is free of Fe2O3The steel wire rod is subjected to torsion test, the iron scale of the new control method has no residue, the mechanical property and the structure of the steel wire rod meet the standard requirements, abnormal structures such as a reticular grain boundary cementite and the like are not found, and the mechanical property is also improved to a certain extent; when the surface of the wire rod is pretreated, the mechanical stripping rate of the iron scale is as high as 95.2%, no residue exists on the surface after online acid washing, the surface of the steel wire is coated with boron to be covered completely, the wire drawing performance is greatly improved, the surface quality grade of the steel wire is improved, and the consumption of a die is obviously improved.
It can be seen from examples 1-3 that the mechanical stripping rate of the iron scale is preferably 96% when the wire rod obtained by the scheme of example 2 is subjected to surface pretreatment.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims (9)

1. A control method for improving mechanical stripping rate of an oxide scale of 80-grade cord steel is characterized by comprising the following steps:
heating and descaling a steel billet: the temperature of the soaking section is 1140-1200 ℃, and the heating time is more than or equal to 2 h; descaling with high-pressure water, wherein the descaling pressure is more than or equal to 14 MPa;
billet rolling and spinning: the initial rolling temperature is 1070-1120 ℃; the finish rolling comprises a first finish rolling and a second finish rolling, wherein the temperature of the first finish rolling is 890-930 ℃; the second finish rolling temperature is 900-950 ℃; the spinning temperature is 920-950 ℃;
and (3) cooling: air cooling and air cooling.
2. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 1, wherein the chemical components of the steel billet comprise, by weight: c: 0.80-0.85%, Mn: 0.40-0.60%, Si: 0.15-0.30%, Cr: less than or equal to 0.05 percent, less than or equal to 0.015 percent, less than or equal to 0.010 percent of S, less than or equal to 0.05 percent of Ni, less than or equal to 0.05 percent of Cu, less than or equal to 0.03 percent of Mo, less than or equal to 0.0020 percent of Al, less than or equal to 0.0010 percent of Ti, less than or equal to 0.0020 percent of [ O ] and less than or equal to 0.0050 percent of [ N ].
3. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 1, wherein the finished speed of the wire rod in the laying head is 100-106 m/s.
4. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 2, wherein the wire rod obtained after the billet is processed by the wire-laying machine is transported to the air cooling channel by a roller way for air cooling, and the speed of the roller way is 0.80-1.18 m/s in the air cooling process.
5. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 1, wherein the temperature of the wire rod obtained after the wire rod is processed by a wire-feeding machine is reduced to 300-340 ℃ after air cooling.
6. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 1, wherein intermediate rolling exists between the initial rolling and the finish rolling, and the intermediate rolling temperature is 1000-1050 ℃.
7. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 1, wherein the descaling time with high-pressure water is 1-3 s.
8. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 4, wherein the FeO content in the scale in the wire rod is more than 80%, and the outermost layer of the surface of the wire rod is free of Fe2O3。
9. The control method for improving the mechanical stripping rate of the scale of 80-grade cord steel according to claim 4, wherein the thickness of the scale of the wire rod is 14-16 μm.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116984388A (en) * 2023-09-25 2023-11-03 江苏永钢集团有限公司 Novel cooling control process for reducing cord steel wire rod iron scale

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046731A (en) * 2007-08-20 2009-03-05 Kobe Steel Ltd Method for manufacturing silicon and chromium-containing bar-steel material excellent in scale detachability
CN104109745A (en) * 2014-06-16 2014-10-22 河北钢铁股份有限公司邯郸分公司 Rolling process of tire cord steel wire rod
CN105483557A (en) * 2014-09-26 2016-04-13 鞍钢股份有限公司 Steel wire rod for 80 grade core thread external winding wire and manufacturing method of steel wire rod
CN106475432A (en) * 2015-08-31 2017-03-08 鞍钢股份有限公司 A kind of high-carbon steel wire rod being suitable to fine steel wire drawing and iron scale control method
CN108237146A (en) * 2017-12-07 2018-07-03 江苏省沙钢钢铁研究院有限公司 A kind of method for improving cord steel oxide skin stripping performance
CN108998732A (en) * 2018-08-08 2018-12-14 鞍钢股份有限公司 A kind of Wire Rod Steel for Curtain String Purpose and its production method suitable for mechanical descaling
CN110340155A (en) * 2019-07-03 2019-10-18 首钢水城钢铁（集团）有限责任公司 A kind of control production method for exempting from pickling SWRH82B gren rod iron scale
CN111872113A (en) * 2020-06-09 2020-11-03 江苏省沙钢钢铁研究院有限公司 Medium-high carbon steel hot-rolled wire rod and production method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046731A (en) * 2007-08-20 2009-03-05 Kobe Steel Ltd Method for manufacturing silicon and chromium-containing bar-steel material excellent in scale detachability
CN104109745A (en) * 2014-06-16 2014-10-22 河北钢铁股份有限公司邯郸分公司 Rolling process of tire cord steel wire rod
CN105483557A (en) * 2014-09-26 2016-04-13 鞍钢股份有限公司 Steel wire rod for 80 grade core thread external winding wire and manufacturing method of steel wire rod
CN106475432A (en) * 2015-08-31 2017-03-08 鞍钢股份有限公司 A kind of high-carbon steel wire rod being suitable to fine steel wire drawing and iron scale control method
CN108237146A (en) * 2017-12-07 2018-07-03 江苏省沙钢钢铁研究院有限公司 A kind of method for improving cord steel oxide skin stripping performance
CN108998732A (en) * 2018-08-08 2018-12-14 鞍钢股份有限公司 A kind of Wire Rod Steel for Curtain String Purpose and its production method suitable for mechanical descaling
CN110340155A (en) * 2019-07-03 2019-10-18 首钢水城钢铁（集团）有限责任公司 A kind of control production method for exempting from pickling SWRH82B gren rod iron scale
CN111872113A (en) * 2020-06-09 2020-11-03 江苏省沙钢钢铁研究院有限公司 Medium-high carbon steel hot-rolled wire rod and production method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116984388A (en) * 2023-09-25 2023-11-03 江苏永钢集团有限公司 Novel cooling control process for reducing cord steel wire rod iron scale
CN116984388B (en) * 2023-09-25 2023-12-01 江苏永钢集团有限公司 Novel cooling control process for reducing cord steel wire rod iron scale

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