CN111172368A - Process and circulation system combining steel wire hot rolling and sorbitizing treatment - Google Patents
Process and circulation system combining steel wire hot rolling and sorbitizing treatment Download PDFInfo
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- CN111172368A CN111172368A CN202010054452.3A CN202010054452A CN111172368A CN 111172368 A CN111172368 A CN 111172368A CN 202010054452 A CN202010054452 A CN 202010054452A CN 111172368 A CN111172368 A CN 111172368A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/44—Methods of heating in heat-treatment baths
- C21D1/46—Salt baths
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/36—Phosphatising
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- 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
- Y02P10/25—Process efficiency
Abstract
The invention provides a process combining hot rolling and sorbite treatment of a steel wire, which is applied to the technical field of steel wire manufacturing and comprises the following steps: paying off, austenitizing, hot rolling, salt bath quenching, desalting and cooling, removing an oxide skin and taking up; spreading the steel wire in production line equipment, heating the steel wire by adopting a medium-high frequency high-speed induction heating technology, and passing the steel wire in an electric heating heat-insulating pipe; hot rolling the steel wire out of the electric heating heat preservation pipe; introducing the steel wire into a salt bath tank for salt bath quenching; guiding the steel wire into a water cooling tank for cooling and desalting; leading the steel wire into a hydrochloric acid pickling tank in any one of a system with a water seal system and a system with an air draft and an acid mist tower; the finished steel wire is taken out from production line equipment, so that the technical effects of realizing effective hot rolling of the steel wire and ensuring the stabilization of sorbite tissues on the steel wire are effectively achieved.
Description
Technical Field
The invention relates to the technical field of steel wire manufacturing, in particular to a process and a circulating system for combining steel wire hot rolling and sorbite treatment.
Background
In the cold deformation processing process of some carbon steel wires and sheet strips, the steel wires and sheet strips cannot be further deformed due to work hardening after cold deformation reaches a certain degree, and the steel wires and sheet strips need to be subjected to structure adjustment and sorbite treatment again to obtain a single, uniform and fine pearlite (sorbite) structure so as to meet the requirements of the use structure of the steel wires and sheet strips or meet the requirements of further processing.
However, the manufacturing process is relatively difficult to control, in order to obtain a smaller pearlite colony size, the austenitizing temperature and the austenitizing heat preservation time are often required to be not too high, and the lead isothermal medium is often harmful to the environment and occupational health.
There is a heat treatment method for the renewed sorbitizing of steel wires or strips, as disclosed in the prior art patent application No. CN201510150991.6, which comprises: heating a steel wire or a steel strip to an austenite temperature, rapidly cooling the austenitized and isothermal steel wire or steel strip to a temperature range above the martensite phase transformation point of the material or within a temperature range of 200-450 ℃, and then conveying the steel wire or steel strip into a heat-insulating sleeve for standing and heat-insulating to complete the Soxhlet phase transformation; the temperature of the sleeve is controlled at any temperature point in the range of room temperature to 500 ℃. The prior art processes for carrying out sorbitizing on steel wires and strips do not need warm equipment such as lead bath, salt bath and the like, and do not need special isothermal devices. The cooling temperature can be controlled by changing the cooling speed, so that the size of the sorbite tissue can be controlled.
In the actual manufacturing of steel wires or steel belts, if the prior art is adopted, the following disadvantages can exist:
the fact that the compressed air is used for cooling to the sorbitizing transition temperature is difficult, because the process is realized by a capital enterprise by liquid nitrogen cooling, the compressed air can only realize the required cooling speed on a very thin steel strip or a very thin steel wire, and the steel strip of the test example cited in the patent is only 0.75mm thick; this is why salt bath quenching is required to achieve effective sorbite transformation over a large size range.
Disclosure of Invention
The invention aims to realize the technical effects of effectively hot rolling steel wires and simultaneously ensuring the stabilization of sorbite tissues on the steel wires, and provides a process and a circulating system for combining hot rolling and sorbite treatment of the steel wires.
The invention adopts the following technical means for solving the technical problems:
a process for the combined hot rolling and sorbitizing of steel wire comprising:
paying off, namely, putting the steel wire in production line equipment;
austenitizing, namely heating the steel wire by adopting a medium-high frequency high-speed induction heating technology, heating the steel wire to 860-1000 ℃, and then passing the steel wire into an electric heating heat-preservation pipe to finish austenitizing the steel wire;
hot rolling the steel wire out of the electric heating heat preservation pipe, wherein the surface reduction rate is 10-90%, the constant temperature of the steel wire is kept at 850-960 ℃ after rolling, and an oxide film is formed on the surface of the hot rolled steel wire;
performing salt bath quenching, namely introducing the steel wire into a salt bath tank for salt bath quenching, wherein the salt bath tank is provided with a molten nitrate, the salt temperature is 500-600 ℃, the heat of the steel wire is exchanged to a flowing salt bath, and the quenching and cooling process is realized, so that a sorbitic tissue is generated in the steel wire;
desalting and cooling, namely guiding the steel wire into a water cooling tank, washing out salt on the surface of the steel wire and cooling to be below 80 ℃;
removing oxide skin, namely guiding the steel wire into a hydrochloric acid pickling tank in any one of a water seal system and a system with air draft and an acid mist tower, wherein the hydrochloric acid concentration in the hydrochloric acid pickling tank is 10% -20%, and the steel wire passes through an overflow layer formed by pumping hot acid liquid to remove the oxide skin;
rinsing with clear water to remove residual acid on the surface of the steel wire;
electrolytic phosphating, namely forming a layer of phosphating film on the surface of the steel wire;
rinsing with clear water to remove residual chemicals on the surface of the steel wire, then passing through an overflow type hot saponification tank, and drying with hot air;
and (4) taking up, and taking out the finished steel wire from the production line equipment.
Further, the paying-off process comprises the following steps:
the diameter of the steel wire is between 5.0mm and 16 mm; the steel wire is horizontally or vertically placed into the production line equipment, and the production line equipment conducts the steel wire by using a conveying speed of between 60 and 600 meters per minute; the high-speed paying-off of the wire rod adopts an upward drawing type, the low-speed horizontal paying-off can be realized, and the steel wire paying-off adopts a spool.
Further, during the process of paying-off and austenitizing, the method further comprises the following steps:
removing phosphorus on the surface, removing oxide skin on the surface of the steel wire by adopting a bending shelling technology, slightly pressing the steel wire, then removing phosphorus on the steel wire by adopting any one of a steel brush rust remover, an abrasive belt machine or a shot blasting machine, and finally blowing air on the surface of the steel wire by adopting an annular air blowing technology.
Further, in the step of austenitizing and hot rolling the steel wire, comprising:
the temperature of the steel wire is increased to 860 ℃ to 1000 ℃, and the constant temperature in the electric heating heat preservation pipe is kept at 850 ℃ to 960 ℃, and the temperature fluctuation does not exceed +/-5 ℃; and monitoring the temperature by using an infrared thermometer, and monitoring the diameter of the steel wire by using a laser diameter gauge after the steel wire is hot-rolled in the step of hot-rolling the steel wire.
Further, the descaling process comprises the following steps:
and reducing acid liquor carried on the surface of the steel wire by adopting either a water curtain sealing mode or an air blowing sealing mode.
The invention also provides a circulating system based on the steel wire hot rolling and soxhlet body treatment combined process, which comprises production line equipment, a controller, a main salt bath, a quenching overflow trough, a water cooling trough, a hydrochloric acid pickling trough, a water tank, an electrolytic phosphating trough and a wastewater collecting pit, wherein:
the production line equipment is used for conveying steel and is communicated with the quenching overflow groove, the water cooling groove, the hydrochloric acid pickling groove, the rinsing groove, the electrolytic phosphating groove, the rinsing groove, the saponification groove and the drying groove in series to realize integration;
the controller is used for controlling production line equipment, the main salt bath, the quenching overflow groove, the water cooling groove, the hydrochloric acid pickling groove, the water tank and the electrolytic phosphating groove;
the main salt bath is used for melting quenching salt, preserving heat, sending molten salt to the quenching overflow groove, receiving the molten salt flowing down from the overflow groove, recovering excess heat through heat exchange, and controlling quenching intensity through the controller;
the quenching overflow groove is used for quenching the steel wire;
the water cooling tank is used for cooling the quenched steel wire and desalting the steel wire, a salinity detection device and a desalting device are installed in the water cooling tank, and salt and water are separated through the salinity detection device and the desalting device;
the hydrochloric acid pickling tank is used for removing oxide skins on the surfaces of the steel wires;
the main salt bath, the quenching overflow groove, the water cooling groove, the electrolytic phosphating groove and the hydrochloric acid pickling groove are all connected with water tanks, pumps and water feeding ports, wherein overflow ports of the water tanks are communicated, and the waste water collecting pit is arranged at a steel wire outlet of production line equipment;
the electrolytic phosphating tank comprises an overflow tank and a mother tank, and a layer of phosphate is deposited on the surface of the steel wire by adopting Faraday's law.
Further, the circulating system based on the combined process of steel wire hot rolling and sorbitizing treatment has height difference among the water tanks.
Further, based on a circulating system of the steel wire hot rolling and soxhlet treatment combined process, the production line equipment transports the steel wires to sequentially pass through a main salt bath, a quenching overflow tank, a water cooling tank, a hydrochloric acid pickling tank, a rinsing tank, an electrolytic phosphating tank, a rinsing tank, saponification and drying to complete the combined process.
The invention provides a process and a circulating system for combining steel wire hot rolling and sorbitizing treatment, which have the following beneficial effects:
the process flow comprises the following steps: paying off, austenitizing, hot rolling steel wires, quenching in salt bath, desalting and cooling, removing oxide skin and taking up, and spreading the steel wires in production line equipment; heating the steel wire by adopting a medium-high frequency high-speed induction heating technology, heating the steel wire to 860-1000 ℃, and then passing the steel wire through an electric heating heat-preservation pipe to complete austenitizing of the steel wire; hot rolling the steel wire out of the electric heating heat preservation pipe, keeping the constant temperature in the electric heating heat preservation pipe at 850-960 ℃ after rolling, and forming an oxide film on the surface of the hot-rolled steel wire; introducing a steel wire into a salt bath tank for salt bath quenching, wherein the salt bath tank is filled with molten nitrate, the salt temperature is 500-600 ℃, and the heat of the steel wire is exchanged to flowing salt bath to realize the quenching and cooling process, so that a sorbite structure is generated in the steel wire; leading the steel wire into a water cooling tank, washing off salt on the surface of the steel wire and cooling to below 80 ℃; leading the steel wire into a hydrochloric acid pickling tank in any one of a water seal system and a system with air draft and an acid mist tower, wherein the hydrochloric acid concentration in the hydrochloric acid pickling tank is 10% -20%, and the steel wire passes through an overflow layer formed by pumping hot acid liquid to wash away oxide skin; the finished steel wire is taken out from production line equipment, so that the technical effects of realizing effective hot rolling of the steel wire and ensuring the stabilization of sorbite tissues on the steel wire are effectively achieved.
Drawings
FIG. 1 is a schematic flow diagram of one embodiment of the process of the present invention combining hot rolling of steel wire with sorbite treatment;
FIG. 2 is a block diagram of an embodiment of the circulation system of the present invention for a combined process of hot rolling and sorbing of steel wire.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of a process combining hot rolling and sorbite treatment of a steel wire according to an embodiment of the present invention is shown;
in the case of the example 1, the following examples are given,
a process for the combined hot rolling and sorbitizing of steel wire comprising:
s1, paying off, namely, putting the steel wire in the production line equipment 1;
in the paying-off process, the diameter of the steel wire is between 5.0mm and 16 mm; the steel wire is horizontally or vertically placed into the production line equipment 1, and the production line equipment 1 conducts the steel wire by using the conveying speed of 60-600 m/min; the high-speed paying-off of the wire rod adopts an upward drawing type, the low-speed horizontal paying-off can be realized, and the steel wire paying-off adopts a spool.
The steel with circular cross section is spread one at a time in the production line equipment 1, the existing mature technology is adopted in the wire spreading technology, the production requirement without shutdown is met, and the material is horizontally or vertically discharged to enter the production line.
S2, austenitizing, namely heating the steel wire by adopting a medium-frequency and high-frequency high-speed induction heating technology, heating the steel wire to 860-1000 ℃, and then passing the steel wire through an electric heating heat-preservation pipe to complete austenitizing of the steel wire;
adopt induction heating technique, form thinner grain structure on the steel wire, be favorable to improving obdurability and fatigue resistance to after heating the steel wire, adopt infrared thermometer to keep watch on the steel wire temperature, wherein induction heating technique is: the high-temperature induction heating furnace 2 in the medium-frequency and high-frequency two-stage mode heats the steel wire to obtain an austenitized structure of Ac1 or more, and forms the austenitized structure on the steel wire.
Specifically, the temperature of the steel wire is at any temperature value of 860-1000 ℃, and the temperature fluctuation is not more than +/-5 ℃.
The induction heated wire is fed into an electrically heated holding tube to provide sufficient time to complete austenitization.
S3, hot rolling the steel wire out of the electric heating heat preservation pipe, keeping the constant temperature in the electric heating heat preservation pipe at 850-960 ℃ after rolling, and forming an oxide film on the surface of the hot rolled steel wire;
the design of the rolling mill is similar to that of a steel mill wire rod rolling mill, the temperature after rolling is stabilized at 850-960 ℃, the temperature fluctuation does not exceed +/-5 ℃, the diameter error of a finished product meets the requirement of +/-0.03 mm, and a thin oxidation film can be remained on the surface. After hot rolling, an infrared thermometer is used for monitoring the temperature, and a laser diameter gauge is used for monitoring the diameter after rolling.
S4, performing salt bath quenching, wherein a horizontally overflowing salt bath overflow groove is adopted to allow a high-temperature linear wire rod or a steel wire to enter, flowing molten nitrate exists in the groove, the salt temperature is 500-600 ℃, and the heat of the steel wire is exchanged to the flowing salt bath to realize the quenching and cooling process, so that a required sorbitizing structure is generated in the steel wire.
The main salt bath keeps the salt temperature at a specific temperature required by 500-600 ℃ through heating, heat preservation and heat exchange technologies, sends the molten salt to a salt bath overflow trough by a pump, and receives the molten salt falling from the overflow trough;
s5, desalting and cooling, introducing the steel wire into a water cooling tank 103, washing out salt on the surface of the steel wire, and cooling to below 80 ℃;
a circulating overflow water cooling tank 103 is adopted to cool the hot steel wire from the salt bath to below 80 ℃, and the salt remained on the surface of the steel wire is washed away; at this time, it can be understood that the water cooling tank 103 has the steel wire after preliminary desalination and the water liquid containing salt, the water cooling tank 103 is provided with a salt detection device, desalted water is pumped into the desalination device to separate the water from the salt, the quenching salt is recovered, and the purified water returns to the water cooling tank 103.
S6, removing oxide skin, namely guiding the steel wire into a hydrochloric acid pickling tank 104 in any one of a water seal system and a system with air draft and an acid mist tower, wherein the hydrochloric acid concentration in the hydrochloric acid pickling tank 104 is 10% -20%, and the steel wire passes through an overflow layer formed by pumping hot acid liquid to remove the oxide skin;
reducing acid liquor carried on the surface of the steel wire by adopting either a water curtain sealing mode or an air blowing sealing mode, and aiming at removing oxide skin, because the steel wire with the oxide skin on the surface is subjected to acid washing through a hydrochloric acid pickling tank 104, the surface of the steel wire contains the acid liquor; therefore, the acid liquor carried on the surface of the steel wire is reduced by adopting a water curtain sealing mode, an air blowing sealing mode or a water and sand spraying mode.
Multi-stage overflow water rinsing, electrolytic phosphorization, multi-stage overflow water rinsing, saponification and hot air drying.
And S7, taking up the steel wire, and taking out the finished steel wire from the production line equipment 1.
In the case of the example 2, the following examples are given,
s1, paying off, namely, putting the steel wire in the production line equipment 1;
in the paying-off process, the diameter of the steel wire is between 5.0mm and 16 mm; the steel wire is horizontally or vertically placed into the production line equipment 1, and the production line equipment 1 conducts the steel wire by using the conveying speed of 60-600 m/min; the high-speed paying-off of the wire rod adopts an upward drawing type, the low-speed horizontal paying-off can be realized, and the steel wire paying-off adopts a spool.
The steel with circular cross section is spread one at a time in the production line equipment 1, the existing mature technology is adopted in the wire spreading technology, the production requirement without shutdown is met, and the material is horizontally or vertically discharged to enter the production line.
S1.5, removing phosphorus on the surface, removing oxide skin on the surface of the steel wire by adopting a bending shelling technology, slightly pressing the steel wire, then removing phosphorus on the steel wire by adopting any one of a steel brush rust remover, an abrasive belt machine or a shot blasting machine, and finally blowing air on the surface of the steel wire by adopting an annular air blowing technology.
S2, austenitizing, namely heating the steel wire by adopting a medium-high frequency high-speed induction heating technology, heating the steel wire to 860-1000 ℃, and then passing the steel wire through an electric heating heat-preservation pipe to complete austenitizing of the steel wire;
adopt induction heating technique, form thinner grain structure on the steel wire, be favorable to improving obdurability and fatigue resistance to after heating the steel wire, adopt infrared thermometer to keep watch on the steel wire temperature, wherein induction heating technique is: the high-temperature induction heating furnace 2 in the medium-frequency and high-frequency two-stage mode heats the steel wire to obtain an austenitized structure of Ac1 or more, and forms the austenitized structure on the steel wire.
Specifically, the temperature of the steel wire is at any temperature value of 860-1000 ℃, and the temperature fluctuation is not more than +/-5 ℃.
Referring to fig. 2, a block diagram of a circulating system based on a combined process of hot rolling and soxhlet treatment of a steel wire, the circulating system based on the combined process of hot rolling and soxhlet treatment of the steel wire comprises a production line device 1, a controller 3, a main salt bath 101, a quenching overflow tank 102, a water cooling tank 103, a hydrochloric acid pickling tank 104, a water tank 5, an electrolytic phosphating tank 105 and a wastewater collection pit 4, wherein:
the production line equipment 1 is used for conveying steel and communicated with a main salt bath 101, a quenching overflow trough 102, a water cooling trough 103, a hydrochloric acid pickling trough 104, a water tank 5, an electrolytic phosphating trough 105 and a wastewater collection pit 4 in series to realize integration;
the controller 3 is used for controlling the production line equipment 1, the main salt bath 101, the quenching overflow groove 102, the water cooling groove 103, the hydrochloric acid pickling groove 104, the water tank 5 and the electrolytic phosphating groove 105;
the quenching overflow groove 102 is used for quenching the steel wire, and the quenching intensity is controlled by the controller 3;
the main salt bath 101 is used for maintaining salt bath parameters, providing flowing molten salt and recovering heat;
the water cooling tank 103 is used for cooling the quenched steel wire and desalting the steel wire, a salinity detection device is arranged in the water cooling tank 103, desalted water is pumped into the desalination device for separating the desalted water from the salinity, quenching salt is recovered, and purified water returns to the water cooling tank 103;
the hydrochloric acid pickling tank 104 is used for removing oxide skin on the surface of the steel wire;
the main salt bath 101, the quenching overflow groove 102, the water cooling groove 103, the electrolytic phosphating groove 105 and the hydrochloric acid pickling groove 104 are all connected with water tanks 5, pumps and water conveying ports, wherein overflow ports of the water tanks 5 are communicated, and the waste water collecting pit 4 is arranged at a steel wire outlet of the production line equipment 1;
the electrolytic phosphating tank 105 comprises an overflow tank and a mother tank, a layer of phosphate is deposited on the surface of the steel wire by using Faraday's law, in another embodiment, the surface of the steel wire is washed by using overflow hot water to remove residual phosphating solution on the surface of the steel wire, then the steel wire enters hot overflow saponification solution, and then the hot overflow saponification solution is blown dry by hot air, so that the finished steel wire is obtained.
In one embodiment, there is a height difference between the water tanks 5.
The height difference between the water tanks 5 is the height difference, and water liquid circulation can be realized through the height difference and the pump.
In one embodiment, the production line apparatus 1 transports the steel wire sequentially through the main salt bath 101, the quench overflow tank 102, the water cooling tank 103, the hydrochloric acid pickling tank 104, and the electrolytic phosphating tank 105 to complete the combined process.
In conclusion, the steel wire is spread in the production line equipment 1 through paying off, austenitizing, hot rolling the steel wire, salt bath quenching, desalting and cooling, descaling and taking up; heating the steel wire by adopting a medium-high frequency high-speed induction heating technology, heating the steel wire to 860-1000 ℃, and then passing the steel wire through an electric heating heat-preservation pipe to complete austenitizing of the steel wire; hot rolling the steel wire out of the electric heating heat preservation pipe, keeping the constant temperature in the electric heating heat preservation pipe at 850-960 ℃ after rolling, and forming an oxide film on the surface of the hot-rolled steel wire; introducing a steel wire into a salt bath tank for salt bath quenching, wherein the salt bath tank is filled with molten nitrate, the salt temperature is 500-600 ℃, and the heat of the steel wire is exchanged to flowing salt bath to realize the quenching and cooling process, so that a sorbite structure is generated in the steel wire; leading the steel wire into a water cooling tank 103, washing off salt on the surface of the steel wire and cooling to below 80 ℃; leading the steel wire into a hydrochloric acid pickling tank 104 in any one of a water seal system and a system with air draft and an acid mist tower, wherein the hydrochloric acid concentration in the hydrochloric acid pickling tank 104 is 10% -20%, and the steel wire passes through an overflow layer formed by pumping hot acid liquid to wash away oxide skin; the finished steel wire is taken out from the production line equipment 1, so that the technical effects of realizing effective hot rolling of the steel wire and ensuring the stabilization of sorbite tissues on the steel wire are effectively achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A process combining hot rolling and sorbitizing treatment of a steel wire, characterized in that it comprises:
paying off, namely, putting the steel wire in production line equipment;
austenitizing, namely heating the steel wire by adopting a medium-high frequency high-speed induction heating technology, heating the steel wire to 860-1000 ℃, and then passing the steel wire into an electric heating heat-preservation pipe to finish austenitizing the steel wire;
hot rolling the steel wire out of the electric heating heat preservation pipe, wherein the surface reduction rate is 10-90%, the constant temperature of the steel wire is kept at 850-960 ℃ after rolling, and an oxide film is formed on the surface of the hot rolled steel wire;
performing salt bath quenching, namely introducing the steel wire into a salt bath tank for salt bath quenching, wherein the salt bath tank is provided with a molten nitrate, the salt temperature is 500-600 ℃, the heat of the steel wire is exchanged to a flowing salt bath, and the quenching and cooling process is realized, so that a sorbitic tissue is generated in the steel wire;
desalting and cooling, namely guiding the steel wire into a water cooling tank, washing out salt on the surface of the steel wire and cooling to be below 80 ℃;
removing oxide skin, namely guiding the steel wire into a hydrochloric acid pickling tank in any one of a water seal system and a system with air draft and an acid mist tower, wherein the hydrochloric acid concentration in the hydrochloric acid pickling tank is 10% -20%, and the steel wire passes through an overflow layer formed by pumping hot acid liquid to remove the oxide skin;
rinsing with multi-stage overflow clear water to remove residual acid on the surface of the steel wire;
and (4) taking up, and taking out the finished steel wire from the production line equipment.
2. The process of combining hot rolling of steel wire with sorbitizing treatment according to claim 1, wherein the paying out comprises:
the diameter of the steel wire is between 5.0mm and 16 mm; the steel wire is horizontally or vertically placed into the production line equipment, and the production line equipment conducts the steel wire by using a conveying speed of between 60 and 600 meters per minute; the high-speed paying-off of the wire rod adopts an upward drawing type, the low-speed horizontal paying-off can be realized, and the steel wire paying-off adopts a spool.
3. The process of steel wire hot rolling combined with sorbing treatment according to claim 1, characterized in that during the process of paying-off and austenitizing, it further comprises:
removing phosphorus on the surface, removing oxide skin on the surface of the steel wire by adopting a bending shelling technology, slightly pressing the steel wire, then removing phosphorus on the steel wire by adopting any one of a steel brush rust remover, an abrasive belt machine or a shot blasting machine, and finally blowing air on the surface of the steel wire by adopting an annular air blowing technology.
4. The process of hot rolling of steel wire combined with the sorbing treatment according to claim 1, characterized in that in the step of austenitizing and hot rolling the steel wire, it comprises:
the temperature of the steel wire is increased to 860 ℃ to 1000 ℃, and the constant temperature in the electric heating heat preservation pipe is kept at 850 ℃ to 960 ℃, and the temperature fluctuation does not exceed +/-5 ℃; and monitoring the temperature by using an infrared thermometer, and monitoring the diameter of the steel wire by using a laser diameter gauge after the steel wire is hot-rolled in the step of hot-rolling the steel wire.
5. The process of steel wire hot rolling combined with sorbing according to claim 1, characterized in that said descaling comprises:
and reducing acid liquor carried on the surface of the steel wire by adopting either a water curtain sealing mode or an air blowing sealing mode.
6. The utility model provides a circulation system based on steel wire hot rolling and soxhlet ization combination technology which characterized in that, includes production line equipment, controller, main salt bath, quenching overflow launder, water-cooling tank, hydrochloric acid pickling tank, water tank, electrolytic phosphating groove and waste water collection hole, wherein:
the production line equipment is used for conveying steel and is communicated with the quenching overflow groove, the water cooling groove, the hydrochloric acid pickling groove, the rinsing groove, the electrolytic phosphating groove, the rinsing groove, the saponification groove and the drying groove in series to realize integration;
the controller is used for controlling production line equipment, the main salt bath, the quenching overflow groove, the water cooling groove, the hydrochloric acid pickling groove, the rinsing groove, the electrolytic phosphating groove and the rinsing groove;
the main salt bath is used for melting quenching salt, preserving heat, sending molten salt to the quenching overflow groove, receiving the molten salt flowing down from the overflow groove, recovering excess heat through heat exchange, and controlling quenching intensity through the controller;
the quenching overflow groove is used for quenching the steel wire;
the water cooling tank is used for cooling the quenched steel wire and desalting the steel wire, a salinity detection device is installed in the water cooling tank, salt and water are separated through a desalting device, and desalted water is recycled to the water cooling tank;
the hydrochloric acid pickling tank is used for removing oxide skins on the surfaces of the steel wires;
the main salt bath, the quenching overflow groove, the water cooling groove, the electrolytic phosphating groove and the hydrochloric acid pickling groove are all connected with water tanks, pumps and water feeding ports, wherein overflow ports of the water tanks are communicated, and the waste water collecting pit is arranged at a steel wire outlet of production line equipment;
the electrolytic phosphating tank comprises an overflow tank and a mother tank, and a layer of phosphate is deposited on the surface of the steel wire by adopting Faraday's law.
7. The circulation system based on steel wire hot rolling and sorbite treatment combined process of claim 6, wherein there is a height difference between the water tanks.
8. The circulating system based on steel wire hot rolling and soxhlet treatment combined process as claimed in claim 6, wherein the production line equipment transports the steel wire to pass through the quenching overflow groove, the water cooling groove, the hydrochloric acid pickling groove and the electrolytic phosphating groove in sequence to complete the combined process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054498A (en) * | 2020-08-03 | 2022-02-18 | 河北鑫达钢铁集团有限公司 | H-shaped steel production process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719643A (en) * | 2012-06-27 | 2012-10-10 | 贵州大学 | Heat processing technology of high-carbon carbon steel coil rod for steel wire rope |
| CN106435099A (en) * | 2016-12-02 | 2017-02-22 | 中钢集团郑州金属制品研究院有限公司 | Steel wire induction heating water bath quenching heat treatment technology |
| CN107299280A (en) * | 2017-08-22 | 2017-10-27 | 青岛特殊钢铁有限公司 | 2000MPa grades of cable steel wires heat treatment wire rod and production method |
| CN108103304A (en) * | 2018-01-23 | 2018-06-01 | 北京建通鸿翔科技有限公司 | A kind of steel wire austempering heat treatment process and equipment |
| CN110172562A (en) * | 2019-06-25 | 2019-08-27 | 江苏宝钢精密钢丝有限公司 | A kind of online salt bath heat treatment method of steel wire multifibres |
-
2020
- 2020-01-17 CN CN202010054452.3A patent/CN111172368A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719643A (en) * | 2012-06-27 | 2012-10-10 | 贵州大学 | Heat processing technology of high-carbon carbon steel coil rod for steel wire rope |
| CN106435099A (en) * | 2016-12-02 | 2017-02-22 | 中钢集团郑州金属制品研究院有限公司 | Steel wire induction heating water bath quenching heat treatment technology |
| CN107299280A (en) * | 2017-08-22 | 2017-10-27 | 青岛特殊钢铁有限公司 | 2000MPa grades of cable steel wires heat treatment wire rod and production method |
| CN108103304A (en) * | 2018-01-23 | 2018-06-01 | 北京建通鸿翔科技有限公司 | A kind of steel wire austempering heat treatment process and equipment |
| CN110172562A (en) * | 2019-06-25 | 2019-08-27 | 江苏宝钢精密钢丝有限公司 | A kind of online salt bath heat treatment method of steel wire multifibres |
Non-Patent Citations (1)
| Title |
|---|
| 李长健: "热处理钢丝在线酸洗磷化工艺", 《全国金属制品信息网第23届年会论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054498A (en) * | 2020-08-03 | 2022-02-18 | 河北鑫达钢铁集团有限公司 | H-shaped steel production process |
| CN114054498B (en) * | 2020-08-03 | 2023-05-12 | 河北鑫达钢铁集团有限公司 | H-shaped steel production process |
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