CN110479763B - Method for directly hot-rolling continuous casting billet into hexagonal stainless steel coil - Google Patents
Method for directly hot-rolling continuous casting billet into hexagonal stainless steel coil Download PDFInfo
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- CN110479763B CN110479763B CN201910653057.4A CN201910653057A CN110479763B CN 110479763 B CN110479763 B CN 110479763B CN 201910653057 A CN201910653057 A CN 201910653057A CN 110479763 B CN110479763 B CN 110479763B
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 49
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 42
- 239000010935 stainless steel Substances 0.000 title claims abstract description 42
- 238000005098 hot rolling Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 238000007670 refining Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000005554 pickling Methods 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 238000010891 electric arc Methods 0.000 claims abstract description 10
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 26
- 238000011010 flushing procedure Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 4
- 238000000137 annealing Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—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
- B21B1/463—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 in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
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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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Geometry (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a method for directly hot-rolling a continuous casting billet into a hexagonal stainless steel coil, which is based on a forming clamping and conveying device and comprises a hole pattern and a clamping and conveying roller which are matched with hexagonal steel: firstly, raw materials are subjected to primary smelting in an electric arc furnace, AOD refining and LF furnace refining to generate a continuous casting square billet: carrying out primary smelting of molten steel in an electric arc furnace, then carrying out AOD refining, refining in an LF furnace, and then producing a continuous casting square billet with the square size of 180 by a square billet continuous casting machine after the components and the temperature of the molten steel meet the design target requirements of products; the produced continuous casting square billet is used for hot rolling, and the fixed length of the continuous casting square billet is 7-7.5 m according to the design requirement of a product; secondly, heating the continuous casting square billet, rolling the continuous casting square billet at a high temperature by a short stress rolling mill, and then performing high-temperature curling forming to obtain a large hexagonal stainless steel coil; and thirdly, carrying out high-temperature solution heat treatment on the large hexagonal stainless steel coil at 1000-1100 ℃, and carrying out pre-pickling, mixed pickling, washing, passivating and neutralizing on the large hexagonal stainless steel coil subjected to solution heat treatment to produce the acid-white hexagonal stainless steel coil.
Description
Technical Field
The invention discloses a method for directly hot rolling a continuous casting billet into a hexagonal stainless steel coil, and relates to the technical fields of steel smelting, rolling, heat treatment, acid pickling and the like in the metallurgical industry
Background
The hexagonal stainless steel can be used for various building structures, and is also suitable for engineering structures, such as houses, bridges, power transmission towers, warehouse shelves and other industries, and plays different roles. The current domestic process for producing the hexagonal steel mainly comprises the following steps: 1. the casting blank is hot rolled into a stainless steel disc, and then the disc is subjected to a 'two-drawing one-annealing' process to produce hexagonal steel; 2. the hexagonal stainless steel is produced by hot rolling a casting blank into a stainless steel round bar, then carrying out multi-pass rolling on the round bar to form a hexagonal bar, and then carrying out acid pickling, polishing, drawing, annealing and other processes. The hexagonal steel produced by the two processes has the defects of complex flow, long period, high manufacturing cost and the like.
According to the invention, through designing the special hole pattern, guide and pinch rolls, the hexagonal stainless steel coil can be directly formed by hot rolling of the continuous casting billet, compared with other traditional production processes, the novel process saves 'one-drawing one-retreating', and the hexagonal steel finished product can be directly produced by one-time drawing of the hexagonal coil or a straight rod. The process has the obvious advantages of simple flow, short production period, low manufacturing cost and the like.
Disclosure of Invention
Based on the defects of complex flow, long period, high manufacturing cost and the like of the conventional process for producing hexagonal steel in the background art, the invention aims to provide the production process for forming the hexagonal stainless steel coil by directly hot rolling the continuous casting billet, and the production process has the advantages of simple flow, short production period, low manufacturing cost and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a production process for forming a hexagonal stainless steel coil by directly hot rolling a continuous casting billet is based on a forming clamping and conveying device and comprises a hole pattern and a clamping and conveying roller which are matched with hexagonal steel, and comprises the following steps:
firstly, raw materials are subjected to primary smelting in an electric arc furnace, AOD refining and LF furnace refining to generate a continuous casting square billet
Carrying out primary smelting of molten steel in an electric arc furnace, then carrying out AOD refining, refining in an LF furnace, and then producing a continuous casting square billet with the square size of 180 by a square billet continuous casting machine after the components and the temperature of the molten steel meet the design target requirements of products; the produced continuous casting square billet is used for hot rolling, and the fixed length of the continuous casting square billet is 7-7.5 m according to the design requirement of a product;
secondly, heating the continuous casting square billet, rolling the continuous casting square billet at a high temperature by a short stress rolling mill, and then performing high-temperature curling forming to obtain a large hexagonal stainless steel coil;
and thirdly, carrying out high-temperature solution heat treatment on the large hexagonal stainless steel coil at 1000-1100 ℃, and carrying out pre-pickling, mixed pickling, washing, passivating and neutralizing on the large hexagonal stainless steel coil subjected to solution heat treatment to produce the acid-white hexagonal stainless steel coil.
Compared with the traditional process, the invention has the following advantages that:
1. the process is simpler: according to the invention, the stainless steel hexagonal steel coil is directly produced by hot rolling of the continuous casting billet, and then the finished hexagonal steel can be directly produced by one-time drawing, and the traditional process adopts a production process that round steel is firstly drawn by one time, then is annealed and softened once, and finally is drawn into the hexagonal stainless steel, so that the process is simpler.
2. The production cycle is shorter: the invention greatly shortens the production period because the flow of one-time drawing, one-time annealing and the like in the traditional production process of two-drawing and one-time annealing are saved.
3. The manufacturing cost is lower: the invention saves the flows of one-time drawing, one-time annealing and the like in the traditional production process of two-drawing and one-time annealing, and the production cost per ton of steel can be reduced by about 1500 yuan/ton.
Drawings
FIG. 1 is a schematic process flow diagram of the first step of the present invention;
FIG. 2 is a schematic view of the hole pattern adapted to the hexagonal steel in the present invention;
FIG. 3 is a schematic view of a special pinch roll of the present invention.
In the figure: 1. and (3) a roller, 2, a hexagonal steel pass, 3, a pinch roller and 4, a pinch roller pass.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings.
Example 1:
the production of this embodiment is that adopt continuous casting billet hot rolling to become hexagonal stainless steel coil, then remove surface scale through solution heat treatment and pickling, this coil can directly produce finished product hexagonal stainless steel through once drawing.
A production process for forming a hexagonal stainless steel coil by directly hot rolling a continuous casting billet is based on a forming clamping and conveying device and comprises a hole pattern (shown in figure 2) matched with hexagonal steel and a clamping and conveying roller (shown in figure 3, the angle of a part A is 120 degrees, the angle of a part B is 15 degrees), and the production process comprises the following steps:
firstly, raw materials are subjected to primary smelting in an electric arc furnace, AOD refining and LF furnace refining to generate a continuous casting square billet, as shown in figure 1, molten steel is subjected to primary smelting in the electric arc furnace, then is subjected to AOD refining, and is subjected to refining in an LF furnace, and after the components and the temperature of the molten steel meet the design target requirements of products, a continuous casting square billet with 180 square is produced through a square billet continuous casting machine; the produced continuous casting square billet is used for hot rolling, and the length of the continuous casting square billet is set to be 7m according to the design requirement of the product;
secondly, heating the continuous casting square billet, rolling the continuous casting square billet at a high temperature by a short stress rolling mill, and then performing high-temperature curling forming to obtain a large hexagonal stainless steel coil;
and thirdly, carrying out high-temperature solution heat treatment on the large hexagonal stainless steel coil at 1000 ℃, and carrying out pre-pickling, mixed pickling, washing, passivating and neutralizing on the large hexagonal stainless steel coil subjected to solution treatment to produce the acid-white hexagonal stainless steel coil.
Example 2:
the production of this embodiment is that adopt continuous casting billet hot rolling to become hexagonal stainless steel coil, then remove surface scale through solution heat treatment and pickling, this coil can directly produce finished product hexagonal stainless steel through once drawing.
A production process for forming a hexagonal stainless steel coil by directly hot rolling a continuous casting billet is based on a forming clamping and conveying device and comprises a hole pattern (shown in figure 2) matched with hexagonal steel and a clamping and conveying roller (shown in figure 3, the angle of a part A is 120 degrees, the angle of a part B is 15 degrees), and the production process comprises the following steps:
firstly, raw materials are subjected to primary smelting in an electric arc furnace, AOD refining and LF furnace refining to generate a continuous casting square billet, as shown in figure 1, molten steel is subjected to primary smelting in the electric arc furnace, then is subjected to AOD refining, and is subjected to refining in an LF furnace, and after the components and the temperature of the molten steel meet the design target requirements of products, a continuous casting square billet with 180 square is produced through a square billet continuous casting machine; the produced continuous casting square billet is used for hot rolling, and the fixed length of the continuous casting square billet is 7.5m according to the design requirement of the product;
secondly, heating the continuous casting square billet, rolling the continuous casting square billet at a high temperature by a short stress rolling mill, and then performing high-temperature curling forming to obtain a large hexagonal stainless steel coil;
and thirdly, carrying out high-temperature solution heat treatment on the large hexagonal stainless steel coil at 1100 ℃, and carrying out pre-pickling, mixed pickling, washing, passivating and neutralizing on the large hexagonal stainless steel coil subjected to solution treatment to produce the acid-white hexagonal stainless steel coil.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (2)
1. The production process for forming the hexagonal stainless steel coil by directly hot rolling the continuous casting billet is based on a forming pinch device, the device comprises a hole pattern and a pinch roll which are matched with the hexagonal stainless steel, and the production process is characterized by comprising the following steps of:
s1 continuous casting square billet is produced by primary smelting of raw materials in an electric arc furnace, AOD refining and LF furnace refining
Carrying out primary smelting of molten steel in an electric arc furnace, then carrying out AOD refining, refining in an LF furnace, and then producing a continuous casting square billet with the square size of 180 by a square billet continuous casting machine after the components and the temperature of the molten steel meet the design target requirements of products; the produced continuous casting square billet is used for hot rolling;
s2, heating the continuous casting square billet, rolling the continuous casting square billet at a high temperature by a short stress rolling mill, and then performing high-temperature curling to obtain a hexagonal stainless steel large coil;
s3, carrying out solution heat treatment on the large hexagonal stainless steel coil, and producing the large hexagonal stainless steel coil subjected to solution heat treatment into an acid-white hexagonal stainless steel coil through the relevant procedures of pre-pickling, mixed pickling, flushing, passivating and neutralizing, wherein the temperature of the solution heat treatment is 1000-1100 ℃.
2. The production process for forming the hexagonal stainless steel coil by directly hot rolling the continuous casting billet according to claim 1, wherein the fixed length of the continuous casting billet is 7-7.5 m according to the product design requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653057.4A CN110479763B (en) | 2019-07-19 | 2019-07-19 | Method for directly hot-rolling continuous casting billet into hexagonal stainless steel coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653057.4A CN110479763B (en) | 2019-07-19 | 2019-07-19 | Method for directly hot-rolling continuous casting billet into hexagonal stainless steel coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110479763A CN110479763A (en) | 2019-11-22 |
| CN110479763B true CN110479763B (en) | 2021-01-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004122162A (en) * | 2002-10-01 | 2004-04-22 | Jfe Steel Kk | Equipment train for continuously casting / manufacturing hot-rolled steel strip and method for manufacturing hot-rolled steel strip |
| CN1278790C (en) * | 2003-11-07 | 2006-10-11 | 莱芜钢铁集团有限公司 | Continuous casting and rolling productive technology for figured steel |
| CN104438418B (en) * | 2014-09-28 | 2017-01-25 | 浙江富钢金属制品有限公司 | Rolling method of stainless steel mold cast steel ingot by one-heating forming |
| CN108941199B (en) * | 2018-06-27 | 2020-02-21 | 湖南三泰新材料股份有限公司 | Steel bar casting and rolling system and steel bar casting and rolling method |
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