CN114985448A - Method for rolling strip steel by using waste heavy rail steel - Google Patents
Method for rolling strip steel by using waste heavy rail steel Download PDFInfo
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- CN114985448A CN114985448A CN202210201334.XA CN202210201334A CN114985448A CN 114985448 A CN114985448 A CN 114985448A CN 202210201334 A CN202210201334 A CN 202210201334A CN 114985448 A CN114985448 A CN 114985448A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 354
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 163
- 239000010959 steel Substances 0.000 title claims abstract description 163
- 239000002699 waste material Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/085—Rail sections
- B21B1/0855—Rerolling or processing worn or discarded rail sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- 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
- B21B37/46—Roll speed or drive motor control
-
- 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
- B21B37/58—Roll-force control; Roll-gap control
-
- 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
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
-
- 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)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to the technical field of rail steel rolling, and discloses a method for rolling strip steel by using waste heavy rail steel, which comprises the following steps: step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 1600-2000 ℃; and step S2, performing 6-8 times of rolling process on the blank until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed. Preferably, in the rolling process of step S2, the rolling force range of the rolling process for the waste heavy rail steel is 8100-. Preferably, the rolling process in step S2 includes the steps of: and step S21, performing a first rolling process. According to the method for rolling the light rail steel by using the waste heavy rail steel, provided by the invention, the light rail steel can be directly heated and rolled without smelting, so that the heavy rail steel can be recycled, the energy consumption can be reduced compared with a smelting recovery method, and the economic benefit is improved.
Description
Technical Field
The invention relates to the technical field of rail steel rolling, in particular to a method for rolling strip steel by using waste heavy rail steel.
Background
In order to ensure the safety of transportation, the rails on the rails need to be regularly maintained and replaced. In the prior art, the recovery mode adopted for replacing the waste steel rail of the heavy railway is as follows: the abandoned steel rails are transported to a goods yard for storing the steel rails and a warehouse for storage in a railway department, part of the abandoned steel rails of the high-standard railways can be installed on the low-standard railways for continuous use, and most of the steel rails stacked in the goods yard are corroded finally.
The reasons why the discarded steel rails are rarely recycled are: the waste steel rail is special steel, needs electric furnace steel-making equipment which is more expensive than common steel-making, consumes large electric energy for smelting, has high recovery cost, and can not meet the requirements of steel rails in practice due to the particularity of the performance requirements of the steel rails. Therefore, for steel mills, the smelting of the waste steel rails does not bring direct economic benefits, and for this reason, a method for rolling strip steel by using the waste heavy rail steel is provided.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a method for rolling strip steel by using waste heavy rail steel.
In order to achieve the purpose, the invention adopts the following technical scheme that the method for rolling the strip steel by using the waste heavy rail steel comprises the following steps: step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 1600-2000 ℃;
and step S2, performing 6-8 times of rolling process on the blank until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed.
Preferably, in the rolling process of step S2, the rolling force range of the rolling process for the waste heavy rail steel is 8100-.
Preferably, the rolling process in step S2 includes the steps of: step S21, performing a first rolling process, setting a rolling force range of 8100-9500KN and a rolling speed range of 3340-410m/min, and controlling the temperature of the blank at 1600-2000 ℃;
step S22, performing a second pass rolling process, setting a rolling force range of 8200-9600KN, a rolling speed range of 360-420m/min, and controlling the temperature of the blank at 1800-2000 ℃;
step S23, performing a third rolling process, setting the rolling force range 8300-9500KN, the rolling speed range 350-400m/min, and controlling the temperature of the blank at 1900-2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range of 8400-9400KN and the rolling speed range of 350-410m/min, and controlling the temperature of the blank at 1700-2000 ℃;
step S25, performing a fifth pass rolling process, setting a rolling force range of 8900-9600KN, a rolling speed range of 340-400m/min, and controlling the temperature of the blank at 1600-2000 ℃;
step S26, performing the sixth pass rolling process, setting the rolling force range of 9100-9600KN, the rolling speed range of 400-420m/min, and controlling the temperature of the blank at 1800-2000 ℃.
Preferably, the heavy rail steel has one of 80Kg, 50Kg, 52Kg, 45Kg and 38 Kg;
the specification of the light rail steel is one of 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg.
Preferably, in step S3, the lightweight rail steel formed in step S2 is cut, cooled and straightened according to the required dimensions of the process.
Preferably, in step S4, the light rail steel molded in step S3 is packaged and stored.
Advantageous effects
The invention provides a method for rolling strip steel by using waste heavy rail steel. The method has the following beneficial effects:
(1) the method for rolling the light rail steel by using the waste heavy rail steel can be used for rolling the light rail steel by directly heating without smelting, so that the heavy rail steel can be recycled, the energy consumption can be reduced compared with a smelting recovery method, and the economic benefit is improved.
(2) According to the method for rolling the strip steel by using the waste heavy rail steel, the obtained light rail steel is obtained by rolling the waste heavy rail steel, the process is simple, the material cost is lower, and the method is more economical.
(3) According to the method for rolling the strip steel by using the waste heavy rail steel, the obtained light rail steel is obtained by rolling the waste heavy rail steel, so that the waste heavy rail is recycled, and the waste of resources is reduced.
Detailed Description
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.
Example 1:
take the example of rolling 40Kg/m light rail steel from waste heavy rail steel with the specification of 80 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 1650 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling process has a rolling force range of 8200KN and a rolling speed range of 350m/min for the waste heavy rail steel;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting the rolling force range to be 8500KN, the rolling speed range of a rolling process to be 410m/min, and controlling the temperature of the blank to be 2000 ℃;
step S22, performing a second pass rolling process, setting the rolling force range to 8200KN, the rolling speed range to 365m/min, and controlling the temperature of the blank to 1850 ℃;
step S23, performing a third rolling process, setting a rolling force range of 8300KN and a rolling speed range of 358m/min in a rolling process, and controlling the temperature of the blank at 1900 ℃;
step S24, performing a fourth pass rolling process, setting a rolling force range of 9400KN, a rolling speed range of 410m/min, and controlling the temperature of the blank at 1750 ℃;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 8920KN and a rolling speed range of 349m/min, and controlling the temperature of the blank at 1720 ℃;
step S26, carrying out a sixth-pass rolling process, setting the rolling force range to be 9100KN, the rolling speed range of the rolling process to be 400m/min, and controlling the temperature of the blank to be 1800 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the light rail steel molded in the step S3 and warehousing.
Example 2:
taking the example of rolling 26Kg/m of light rail steel from waste heavy rail steel with the specification of 50 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the billet to 2000 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling force range of the rolling process on the waste heavy rail steel is 8500KN, and the rolling speed range of the rolling process is 367 m/min;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting a rolling force range of 8100KN, a rolling speed range of a rolling process of 3340m/min, and controlling the temperature of the blank to be 2000 ℃;
step S22, performing a second pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of 360m/min in a rolling process, and controlling the temperature of the blank to be 1800 ℃;
step S23, performing a third rolling process, setting the rolling force range to be 8500KN, the rolling speed range of the rolling process to be 350m/min, and controlling the temperature of the blank to be 1900 ℃;
step S24, performing a fourth-pass rolling process, setting a rolling force range of 8900KN, setting a rolling speed range of 350m/min in a rolling process, and controlling the temperature of the blank to be 1700 ℃;
step S25, performing a fifth pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of 400m/min, and controlling the temperature of the blank to be 2000 ℃;
step S26, carrying out a sixth-pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of a rolling process of 400m/min, and controlling the temperature of the blank to be 2000 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the molded light rail steel in the step S3, and warehousing.
Example 3:
taking the example of rolling 21Kg/m light rail steel from waste heavy rail steel with the specification of 52 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the billet to 198 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling force range of the rolling process on the waste heavy rail steel is 9300KN, and the rolling speed range of the rolling process is 410 m/min;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting the rolling force range to be 8500KN, the rolling speed range of a rolling process to be 410m/min, and controlling the temperature of the blank to be 2000 ℃;
step S22, performing a second pass rolling process, setting a rolling force range of 9600KN and a rolling speed range of 370m/min in a rolling process, and controlling the temperature of the blank to be 1800 ℃;
step S23, performing a third rolling process, setting a rolling force range of 9500KN, a rolling speed range of 400m/min in a rolling process, and controlling the temperature of the blank at 2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range 8400KN, the rolling speed range of the rolling process 410m/min, and controlling the temperature of the blank at 1700;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 9600KN and a rolling speed range of 340m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S26, carrying out a sixth-pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of a rolling process of 400m/min, and controlling the temperature of the blank to be 2000 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is one of 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the light rail steel molded in the step S3 and warehousing.
Example 3:
taking the example of rolling 18Kg/m of light rail steel from 45Kg/m of waste heavy rail steel.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and the billet was heated to 1623 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling force range of the rolling process on the waste heavy rail steel is 9500KN, and the rolling speed range of the rolling process is 415 m/min;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting a rolling force range 8250KN and a rolling speed range 3340m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S22, performing a second pass rolling process, setting a rolling force range 9300KN, a rolling speed range of the rolling process to be 360m/min, and controlling the temperature of the blank to be 2000 ℃;
step S23, performing a third rolling process, setting a rolling force range of 9500KN and a rolling speed range of 350m/min in a rolling process, and controlling the temperature of the blank at 2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range to 9400KN, the rolling speed range of the rolling process to be 350m/min, and controlling the temperature of the blank to be 1700 ℃;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 9600KN and a rolling speed range of 340m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S26, carrying out a sixth-pass rolling process, setting the rolling force range to be 9100KN, the rolling speed range of the rolling process to be 420m/min, and controlling the temperature of the blank to be 1800 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the molded light rail steel in the step S3, and warehousing.
Example 4:
take the example of rolling 20Kg/m light rail steel with the waste heavy rail steel with the specification of 38 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 1600 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling process has a rolling force range of 8199KN and a rolling speed range of 348m/min for the waste heavy rail steel;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting a rolling force range 8258KN and a rolling speed range 3340m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S22, performing a second pass rolling process, setting the rolling force range 8450KN, the rolling speed range of the rolling process to be 360m/min, and controlling the temperature of the blank to be 2000 ℃;
step S23, performing a third rolling process, setting a rolling force range of 9500KN and a rolling speed range of 350m/min in a rolling process, and controlling the temperature of the blank at 2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range to 9400KN, the rolling speed range of the rolling process to be 350m/min, and controlling the temperature of the blank to be 2000 ℃;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 9600KN and a rolling speed range of 340m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S26, carrying out a sixth-pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of a rolling process of 400m/min, and controlling the temperature of the blank to be 2000 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is one of 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the light rail steel molded in the step S3 and warehousing.
Example 5:
taking the example of rolling 18Kg/m of light rail steel from waste heavy rail steel with the specification of 52 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the billet to 2000 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling force range of the rolling process on the waste heavy rail steel is 9483KN, and the rolling speed range of the rolling process is 419 m/min;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting the rolling force range to 8700KN, the rolling speed range of the rolling process to 408m/min, and controlling the temperature of the blank to be 2000 ℃;
step S22, performing a second pass rolling process, setting the rolling force range to be 9600KN, the rolling speed range of the rolling process to be 420m/min, and controlling the temperature of the blank to be 2000 ℃;
step S23, performing a third rolling process, setting a rolling force range of 8300KN and a rolling speed range of 360m/min in a rolling process, and controlling the temperature of the blank to 1952 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range of 8400-9400KN and the rolling speed range of 350-410m/min, and controlling the temperature of the blank at 1700-2000 ℃;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 8900KN, a rolling speed range of 340m/min, and controlling the temperature of the blank to be 2000 ℃;
step S26, carrying out a sixth-pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of a rolling process of 400m/min, and controlling the temperature of the blank to be 2000 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the molded light rail steel in the step S3, and warehousing.
Example 6:
take the example of rolling 21Kg/m light rail steel from waste heavy rail steel with the specification of 38 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 1900 ℃;
step S2, carrying out 6-pass rolling process on the blank until the blank is rolled into light rail steel with the required specification and product size, and setting rolling force and rolling speed;
in the rolling process of the step S2, the rolling force range of the rolling process on the waste heavy rail steel is 8100KN, and the rolling speed range of the rolling process is 360 m/min;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting a rolling force range of 8100-9500KN, a rolling speed range of 380m/min in a rolling process, and controlling the temperature of the blank at 1600 ℃;
step S22, performing a second pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of 360m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S23, performing a third rolling process, setting a rolling force range of 9500KN and a rolling speed range of 350m/min in a rolling process, and controlling the temperature of the blank at 2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range of 8400-9400KN, the rolling speed range of the rolling process of 390m/min, and controlling the temperature of the blank at 1700 ℃;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 9600KN and a rolling speed range of 340m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S26, carrying out a sixth-pass rolling process, setting the rolling force range to be 600KN, the rolling speed range of the rolling process to be 400m/min, and controlling the temperature of the blank to be 2000 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the light rail steel molded in the step S3 and warehousing.
Example 7:
take the waste heavy rail steel with the specification of 50Kg/m as an example to roll the light rail steel with the specification of 38 Kg/m.
A method for rolling light rail steel by using waste heavy rail steel comprises the following steps:
step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 2000 ℃;
step S2, rolling the blank for 6 times until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed;
in the rolling process of the step S2, the rolling force range of the rolling process on the waste heavy rail steel is 8500KN, and the rolling speed range of the rolling process is 420 m/min;
the rolling process in step S2 includes the steps of:
step S21, performing a first-pass rolling process, setting a rolling force range of 9500KN, a rolling speed range of 410m/min in a rolling process, and controlling the temperature of the blank at 2000 ℃;
step S22, performing a second pass rolling process, setting the rolling force range to be 9600KN, the rolling speed range of the rolling process to be 420m/min, and controlling the temperature of the blank to be 2000 ℃;
step S23, performing a third rolling process, setting a rolling force range of 9500KN, a rolling speed range of 400m/min in a rolling process, and controlling the temperature of the blank at 2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range to 9400KN, the rolling speed range of the rolling process to 410m/min, and controlling the temperature of the blank to be 2000 ℃;
step S25, performing a fifth-pass rolling process, setting a rolling force range of 9600KN, a rolling speed range of 400m/min in a rolling process, and controlling the temperature of the blank to be 2000 ℃;
step S26, performing a sixth pass rolling process, setting a rolling force range of 9100-9600KN, a rolling speed range of 400m/min, and controlling the temperature of the blank at 1800 ℃;
the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg;
step S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the size of the process requirement;
and step S4, packaging the molded light rail steel in the step S3, and warehousing.
Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Claims (6)
1. A method for rolling strip steel by using waste heavy rail steel is characterized by comprising the following steps: step S1, blanking the waste heavy rail steel according to the process requirement to form a blank; and heating the blank to 1600-2000 ℃;
and step S2, performing 6-8 times of rolling process on the blank until the blank is rolled into light rail steel with the required specification and product size, and setting the rolling force and the rolling speed.
2. The method for rolling the steel strip by using the waste heavy rail steel as claimed in claim 1, wherein the method comprises the following steps: in the rolling process of step S2, the rolling force range of the rolling process for the waste heavy rail steel is 8100-9600KN, and the rolling speed range of the rolling process is 340-420 m/min.
3. The method for rolling the steel strip by using the waste heavy rail steel as claimed in claim 2, wherein the rolling process in the step S2 comprises the steps of: step S21, performing a first rolling process, setting a rolling force range of 8100-9500KN, a rolling speed range of 3340-410m/min, and controlling the temperature of the blank at 1600-2000 ℃;
step S22, performing a second pass rolling process, setting the rolling force range of 8200-9600KN, the rolling speed range of 360-420m/min, and controlling the temperature of the blank at 1800-2000 ℃;
step S23, performing a third rolling process, setting a rolling force range of 8300-9500KN and a rolling speed range of 350-400m/min in the rolling process, and controlling the temperature of the blank at 1900-2000 ℃;
step S24, performing a fourth pass rolling process, setting the rolling force range of 8400-9400KN and the rolling speed range of 350-410m/min, and controlling the temperature of the blank at 1700-2000 ℃;
step S25, performing a fifth pass rolling process, setting a rolling force range of 8900-9600KN, a rolling speed range of 340-400m/min, and controlling the temperature of the blank at 1600-2000 ℃;
step S26, performing the sixth rolling process, setting the rolling force range of 9100-9600KN, the rolling speed range of 400-420m/min, and controlling the temperature of the blank at 1800-2000 ℃.
4. The method for rolling the steel strip by using the waste heavy rail steel as claimed in claim 3, wherein the method comprises the following steps: the specification of the heavy rail steel is one of 80Kg, 50Kg, 52Kg, 45Kg or 38 Kg;
the specification of the light rail steel is one of 40Kg, 26Kg, 21Kg, 18Kg, 19Kg or 20 Kg.
5. The method for rolling the steel strip by using the waste heavy rail steel as claimed in claim 4, wherein the method comprises the following steps: and S3, cutting, cooling and straightening the light rail steel molded in the step S2 according to the process requirement size.
6. The method for rolling the steel strip by using the waste heavy rail steel as claimed in claim 5, wherein the method comprises the following steps: and step S4, packaging the light rail steel molded in the step S3 and warehousing.
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| CN202210201334.XA CN114985448A (en) | 2022-03-03 | 2022-03-03 | Method for rolling strip steel by using waste heavy rail steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210201334.XA CN114985448A (en) | 2022-03-03 | 2022-03-03 | Method for rolling strip steel by using waste heavy rail steel |
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| JPS55165201A (en) * | 1979-06-06 | 1980-12-23 | Morio Shinoda | Method and apparatus for regenerating old rail |
| US4982591A (en) * | 1988-12-20 | 1991-01-08 | W. Silver, Inc. | Rail recycle process |
| CN1123202A (en) * | 1994-10-14 | 1996-05-29 | 高有志 | Technological method for rolling spring steel by using waste and old steel rail |
| CN1190036A (en) * | 1997-12-23 | 1998-08-12 | 张曙光 | Production process of steel wire with waste rail by rolling and drawing |
| CN1229012A (en) * | 1998-03-13 | 1999-09-22 | 李忠福 | Technology for rerolling light rail from waste heavy rail |
| CN111545567A (en) * | 2020-05-18 | 2020-08-18 | 谭周全 | Method for rolling light rail steel by using waste heavy rail steel |
| CN113877979A (en) * | 2021-09-27 | 2022-01-04 | 滦南县兴凯盛金属制品厂 | Production process of I-shaped steel and square column buckle clamping plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55165201A (en) * | 1979-06-06 | 1980-12-23 | Morio Shinoda | Method and apparatus for regenerating old rail |
| US4982591A (en) * | 1988-12-20 | 1991-01-08 | W. Silver, Inc. | Rail recycle process |
| CN1123202A (en) * | 1994-10-14 | 1996-05-29 | 高有志 | Technological method for rolling spring steel by using waste and old steel rail |
| CN1190036A (en) * | 1997-12-23 | 1998-08-12 | 张曙光 | Production process of steel wire with waste rail by rolling and drawing |
| CN1229012A (en) * | 1998-03-13 | 1999-09-22 | 李忠福 | Technology for rerolling light rail from waste heavy rail |
| CN111545567A (en) * | 2020-05-18 | 2020-08-18 | 谭周全 | Method for rolling light rail steel by using waste heavy rail steel |
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