CN116511239A - Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line - Google Patents

Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line Download PDF

Info

Publication number
CN116511239A
CN116511239A CN202310533997.6A CN202310533997A CN116511239A CN 116511239 A CN116511239 A CN 116511239A CN 202310533997 A CN202310533997 A CN 202310533997A CN 116511239 A CN116511239 A CN 116511239A
Authority
CN
China
Prior art keywords
percent
rolling
continuous casting
hrb500e
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310533997.6A
Other languages
Chinese (zh)
Inventor
刘金花
章远杰
梁钊
王田
张修宁
刘健
张杰新
刘向东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Iron and Steel Co Ltd
Original Assignee
Chongqing Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Iron and Steel Co Ltd filed Critical Chongqing Iron and Steel Co Ltd
Priority to CN202310533997.6A priority Critical patent/CN116511239A/en
Publication of CN116511239A publication Critical patent/CN116511239A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B21B1/18—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 in a continuous process
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • 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
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/12—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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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

Abstract

The invention belongs to the technical field of steel production, and relates to a method for producing HRB500E threaded steel bars by continuous casting and direct rolling of a double high-rod production line. The method saves energy consumption, reduces production cost, improves strength and toughness of the reinforcing steel bars, ensures that the organization and performance of the reinforcing steel bars reach the standard stably, and improves production efficiency and product quality.

Description

Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line
Technical Field
The invention belongs to the technical field of steel production, and relates to a method for producing HRB500E screw-thread steel bars by continuous casting and direct rolling of a double high-rod production line.
Background
The twisted steel is widely applied to constructional engineering, and has higher yield strength, tensile strength and good bonding performance. The existing long bar production line at home and abroad mainly adopts a heating furnace to produce HRB500E and adopts alloy elements to produce, and the production process flow comprises blast furnace molten iron smelting, molten iron desulfurization pretreatment, converter molten steel smelting, argon blowing, LF refining, square billet continuous casting, heating by the heating furnace, rough rolling, middle rolling, pre-finish rolling, cooling bed feeding and finishing. The process flow adopts a heating furnace for production, the fluctuation of the initial rolling temperature is small, but a large amount of gas is consumed, and the high yield ratio is not easy to control.
Chinese patent publication No. CN113403533a discloses a method for producing HRB500E screw-thread steel bar by high-speed bar, which comprises: the method comprises the following steps of blast furnace molten iron smelting, molten iron desulfurization pretreatment, converter molten steel smelting, argon blowing, LF refining, billet continuous casting, heating by a heating furnace, rough rolling, middle rolling, pre-finish rolling, controlled cooling and recovery, finish rolling, controlled cooling after rolling and recovery; the components of the HRB500E deformed bar produced by the high-speed bar are as follows: c:0.21 to 0.25Wt percent, si:0.65 to 0.80Wt percent, mn:1.2 to 1.35Wt percent, P: less than or equal to 0.04wt%, S: less than or equal to 0.035Wt%, V:0.03 to 0.06Wt percent, nb:0.008 to 0.02wt%, N:0.007 to 0.017wt%, B:0.001 to 0.003Wt percent, cr:0.1 to 0.2Wt percent. The method has the advantages of high production efficiency, good surface quality and the like, but the adopted alloy is V, nb, N, B, cr alloy with higher cost.
The Chinese patent with publication number of CN114836674A discloses a production method of hot rolled ribbed steel bar HRB500E, which comprises the steps of heating a steel billet in a heating furnace, rough rolling, middle rolling, finish rolling, water cooling, cooling on a cooling bed and naturally aging; the temperature of the soaking section in the heating furnace is 1130-1160 ℃; the initial rolling temperature is 1030-1060 ℃, the finish rolling temperature is 1020-1040 ℃, and the upper cooling bed temperature is 900-940 ℃; the components are as follows: 0.21 to 0.25 percent of C,0.40 to 0.60 percent of Si,1.20 to 1.50 percent of Mn, less than or equal to 0.045 percent of S, less than or equal to 0.045 percent of P, 0.045 to 0.055 percent of V,0.010 to 0.020 percent of Nb and the balance of Fe element, ensures stable performance to reach the standard, but adopts V, nb alloy, and the finishing rolling temperature is 1000 ℃ and the temperature is higher.
Disclosure of Invention
In view of the above, the present invention aims to solve the above problems of the existing HRB500E screw-thread steel bar production process, and provides a method for producing HRB500E screw-thread steel bars by continuous casting and direct rolling of a dual high-rod production line. The method does not need a heating furnace for production, adopts V, nb and N composite alloy for production, controls the initial rolling temperature to be more than or equal to 950 ℃, controls the middle rolling 980+/-20 ℃ and the pre-finish rolling temperature to be 960+/-20 ℃, and finishes rolling 960+/-20 ℃ and puts the alloy on a cooling bed 960+/-20 ℃ to realize the method for producing the HRB500E threaded steel bar by the double high-rod production line.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for producing HRB500E screw-thread steel bars by double high-rod production line continuous casting and direct rolling comprises the following steps:
(1) And (3) batching: the HRB500E deformed steel bar is prepared from the following components in percentage by mass: 0.21 to 0.25 percent of C,0.20 to 0.40 percent of Si,1.30 to 1.60 percent of Mn, less than or equal to 0.045 percent of S, less than or equal to 0.045 percent of P, 0.040 to 0.055 percent of V,0.015 to 0.030 percent of Nb,0.0100 to 0.0150 percent of N, and the balance of Fe and impurities;
(2) The process flow comprises the following steps: adopting a BOF-Ar station-LF-CC process path and a vanadium-nitrogen-niobium composite alloying process, calculating required alloy according to the component requirements of ingredients, and smelting in a converter; the alloying of converter tapping adopts manganese-silicon alloy, ferrosilicon, high-carbon ferromanganese and ferrovanadium alloy to prepare manganese, silicon and vanadium, the LF procedure adopts high-carbon ferromanganese and ferrosilicon alloy to adjust the components manganese and silicon, and niobium iron sand is adopted to prepare niobium;
(3) Casting molten steel into qualified square billets, adopting continuous casting and direct rolling process tissue production, and controlling the continuous casting pulling speed to be 2.7-2.9 m/min, wherein the steel feeding temperature is required to be more than or equal to 970 ℃;
(4) Conveying the steel mill to roll, wherein the steel rolling process comprises the following steps: the steel mill cancels a heating furnace, the initial rolling temperature of rough rolling is more than or equal to 950 ℃, the intermediate rolling temperature is 980+/-20 ℃, the pre-finish rolling temperature is controlled to 960+/-20 ℃, the finish rolling temperature is 960+/-20 ℃, and the steel mill is finished and bundled on a cooling bed 960+/-20 ℃.
Further, the specification of the produced deformed bar is phi 12mm.
Further, the section requirements of the square billet in the step (3) are as follows: 170mm by 12m, and adding continuous casting and direct rolling processes.
The invention has the beneficial effects that:
(1) The invention cancels the production of the heating furnace, saves energy consumption and reduces production cost; (2) The invention adopts the V, nb and N composite alloy to produce, improves the strength and toughness of the steel bar and reduces the alloy cost; (3) The invention ensures that the structure and performance of the steel bars reach the standard stably by controlling the continuous casting drawing speed and the rolling start temperature, and feeding the steel bars into the pre-finish rolling, finish rolling and cooling bed temperatures; (4) the invention improves the production efficiency and the product quality.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
A method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production lines is used for producing deformed bar with the specification of phi 12mm and comprises the following steps:
(1) And (3) batching: the HRB500E deformed steel bar is prepared from the following components in percentage by mass: 0.21 to 0.25 percent of C,0.20 to 0.40 percent of Si,1.30 to 1.60 percent of Mn, less than or equal to 0.045 percent of S, less than or equal to 0.045 percent of P, 0.040 to 0.055 percent of V,0.015 to 0.030 percent of Nb,0.0100 to 0.0150 percent of N, and the balance of Fe and impurities;
(2) The process flow comprises the following steps: adopting a BOF-Ar station-LF-CC process path and a vanadium-nitrogen-niobium composite alloying process, calculating required alloy according to the component requirements of ingredients, and smelting in a converter; the alloying of converter tapping adopts manganese-silicon alloy, ferrosilicon, high-carbon ferromanganese and ferrovanadium alloy to prepare manganese, silicon and vanadium, the LF procedure adopts high-carbon ferromanganese and ferrosilicon alloy to adjust the components manganese and silicon, and niobium iron sand is adopted to prepare niobium;
(3) Casting the molten steel into qualified square billets, wherein the cross section of the square billets is as follows: 170mm by 12m. Adopting continuous casting and direct rolling process tissue production, controlling the continuous casting pulling speed to be 2.7-2.9 m/min, and controlling the steel feeding temperature to be more than or equal to 970 ℃;
(4) Conveying the steel mill to roll, wherein the steel rolling process comprises the following steps: the steel mill cancels a heating furnace, the initial rolling temperature of rough rolling is more than or equal to 950 ℃, the intermediate rolling temperature is 980+/-20 ℃, the pre-finish rolling temperature is controlled to 960+/-20 ℃, the finish rolling temperature is 960+/-20 ℃, and the steel mill is finished and bundled on a cooling bed 960+/-20 ℃.
Specifically, the nominal diameter phi of rolling is 12mm, the continuous casting pulling speed is 2.82m/min, the initial rolling temperature is 994 ℃, the intermediate rolling temperature is 991 ℃, the pre-finish rolling temperature is controlled to 953 ℃, the finish rolling temperature is 948 ℃, and the product is subjected to cold bed 945 ℃, so that the performances of mechanical yield strength, high yield ratio and the like meet the standard requirements, and the performance is shown in the following table.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.

Claims (3)

1. The method for producing the HRB500E threaded steel bar by continuous casting and direct rolling of the double high-rod production line is characterized by comprising the following steps of:
(1) And (3) batching: the HRB500E deformed steel bar is prepared from the following components in percentage by mass: 0.21 to 0.25 percent of C,0.20 to 0.40 percent of Si,1.30 to 1.60 percent of Mn, less than or equal to 0.045 percent of S, less than or equal to 0.045 percent of P, 0.040 to 0.055 percent of V,0.015 to 0.030 percent of Nb,0.0100 to 0.0150 percent of N, and the balance of Fe and impurities;
(2) The process flow comprises the following steps: adopting a BOF-Ar station-LF-CC process path and a vanadium-nitrogen-niobium composite alloying process, calculating required alloy according to the component requirements of ingredients, and smelting in a converter; the alloying of converter tapping adopts manganese-silicon alloy, ferrosilicon, high-carbon ferromanganese and ferrovanadium alloy to prepare manganese, silicon and vanadium, the LF procedure adopts high-carbon ferromanganese and ferrosilicon alloy to adjust the components manganese and silicon, and niobium iron sand is adopted to prepare niobium;
(3) Casting molten steel into qualified square billets, adopting continuous casting and direct rolling process tissue production, and controlling the continuous casting pulling speed to be 2.7-2.9 m/min, wherein the steel feeding temperature is required to be more than or equal to 970 ℃;
(4) Conveying the steel mill to roll, wherein the steel rolling process comprises the following steps: the steel mill cancels a heating furnace, the initial rolling temperature of rough rolling is more than or equal to 950 ℃, the intermediate rolling temperature is 980+/-20 ℃, the pre-finish rolling temperature is controlled to 960+/-20 ℃, the finish rolling temperature is 960+/-20 ℃, and the steel mill is finished and bundled on a cooling bed 960+/-20 ℃.
2. The method for producing the HRB500E screw-thread steel bar by continuous casting and rolling of the double high-rod production line according to claim 1, which is characterized in that: the specification of the produced twisted steel is phi 12mm.
3. The method for producing the HRB500E screw-thread steel bar by continuous casting and rolling of the double high-rod production line according to claim 2, which is characterized in that: the section requirements of the square billet in the step (3) are as follows: 170mm by 12m, and adding continuous casting and direct rolling processes.
CN202310533997.6A 2023-05-12 2023-05-12 Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line Pending CN116511239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310533997.6A CN116511239A (en) 2023-05-12 2023-05-12 Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310533997.6A CN116511239A (en) 2023-05-12 2023-05-12 Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line

Publications (1)

Publication Number Publication Date
CN116511239A true CN116511239A (en) 2023-08-01

Family

ID=87408084

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310533997.6A Pending CN116511239A (en) 2023-05-12 2023-05-12 Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line

Country Status (1)

Country Link
CN (1) CN116511239A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116984373A (en) * 2023-09-27 2023-11-03 陕西钢铁集团有限公司 Economical green production method of high-strength shock-resistant deformed steel bar
CN117265423A (en) * 2023-10-16 2023-12-22 陕西钢铁集团有限公司 Method for producing HRB500E screw steel by direct rolling without heating and heat preservation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116984373A (en) * 2023-09-27 2023-11-03 陕西钢铁集团有限公司 Economical green production method of high-strength shock-resistant deformed steel bar
CN117265423A (en) * 2023-10-16 2023-12-22 陕西钢铁集团有限公司 Method for producing HRB500E screw steel by direct rolling without heating and heat preservation

Similar Documents

Publication Publication Date Title
CN110042303B (en) 400 MPa-level fine-grain hot-rolled steel bar and production process thereof
CN102352469B (en) Ultrahigh-strength vanadium-titanium composite microalloyed high carbon steel wire rod and preparation method thereof
CN116511239A (en) Method for producing HRB500E deformed bar by continuous casting and direct rolling of double high-rod production line
CN102517521B (en) MnCr carburized gear steel and its production method
CN104372247A (en) 600MPa high-strength antiseismic coil rod twisted steel bar and preparation method thereof
CN102936688B (en) Wire with tensile strength>=2000MPa for bridge cable and production method
CN114000051B (en) Ultra-fine grain HRB400E wire rod anti-seismic steel bar and preparation method thereof
CN110079728B (en) High-strength twisted steel with good weldability and manufacturing method thereof
CN101096735A (en) Easy-weld hardening high-strength steel plate and production method thereof
CN102925799B (en) A kind of production method of ultra-high strength steel plate
CN114000050B (en) Nitrogen-rich vanadium-chromium microalloyed ultra-fine grain corrosion-resistant HRB400E wire rod anti-seismic steel bar and preparation method thereof
CN112410677A (en) 500 MPa-grade hot-rolled spiral shell and production method thereof
CN112176258B (en) Wire rod for 2500 MPa-grade steel strand and manufacturing method thereof
CN114058770A (en) Production method of HRB600E high-strength anti-seismic steel bar
CN103361552A (en) V-N microalloying 460MPa-level thick plate and manufacturing method thereof
CN109628693B (en) Low-cost magnesium-treated microalloyed steel and preparation method thereof
CN111500920A (en) HRB600 high-strength anti-seismic deformed steel bar and production method thereof
CN114517254A (en) Low-temperature-resistant flat bulb steel for ships and preparation method thereof
CN111500933A (en) Rare earth element microalloyed high-strength steel bar and production process thereof
CN116695014A (en) High-carbon steel wire rod with uniform deformation performance and manufacturing process
CN111041368A (en) High-performance 82B wire rod steel and production method thereof
CN116121631A (en) Production method of large-specification niobium microalloyed rolled controlled-cooling HRB400E steel bar
CN115976418A (en) Non-quenched and tempered GF20Mn2V steel for high-strength bolt and preparation method thereof
CN102876972B (en) A kind of production method of ultra-high strength steel plate
CN114959504A (en) Acid-washing-free cord steel wire rod and production method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination