CN111318566A - Production method of iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil - Google Patents
Production method of iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil Download PDFInfo
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- CN111318566A CN111318566A CN202010186280.5A CN202010186280A CN111318566A CN 111318566 A CN111318566 A CN 111318566A CN 202010186280 A CN202010186280 A CN 202010186280A CN 111318566 A CN111318566 A CN 111318566A
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- -1 iron-chromium-aluminum Chemical compound 0.000 title claims abstract description 90
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 89
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 238000009749 continuous casting Methods 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000005098 hot rolling Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 description 6
- 239000000956 alloy Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
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- 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
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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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
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/06—Width
-
- 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
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a method for producing a hot-rolled steel coil of an iron-chromium-aluminum alloy continuous casting slab, which comprises the following steps: loading an iron-chromium-aluminum alloy continuous casting plate blank into a heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before being loaded into the furnace is controlled to be more than or equal to 50 ℃; heating the heating furnace to 1100-1200 ℃ within 0.5-6 hours, and then preserving the heat for 30-250 minutes; taking the iron-chromium-aluminum alloy continuous casting slab out of the heating furnace for hot rolling, controlling the process temperature and the finish rolling temperature of the hot rolled steel coil to be 600-1200 ℃, and controlling the thickness of the hot rolled steel strip to be 1.2-8.0 mm; after hot rolling, spraying water to cool the steel strip, reducing the surface temperature of the steel strip to 200-450 ℃ within 15-30 seconds, and then coiling the steel strip. The production method can ensure that the steel coil can be smoothly opened in the subsequent process, and the phenomenon of strip breakage can not occur.
Description
Technical Field
The invention generally relates to the technical field of electric heating alloy steel coil hot processing. More particularly relates to a production method of a hot rolled steel coil of an iron-chromium-aluminum alloy continuous casting slab.
Background
The iron-chromium-aluminum alloy is an electric heating alloy material with a ferrite structure, and has the following main marks: steel grades (GB/T1234, ASTM B603 or electro-thermal alloy iron-chromium-aluminum grades specified by other standards) such as 1Cr13Al4, 0Cr21Al5, 0Cr21Al6, 0Cr25Al5 and 0Cr27Al7Mo2 are widely applied to the fields of electro-thermal, environmental protection and the like. At present, the method mainly adopts forging slabs after electroslag remelting and hot rolling steel coils after the forging slabs are cold-state loaded into a heating furnace and heated to produce the iron-chromium-aluminum alloy strips. The existing production method of the hot rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab has low efficiency and limited product specification.
Particularly, when the existing production method of the hot rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab is adopted to produce the hot rolled steel coil with the width of 200-2050 mm and the thickness of 1.2-8.0 mm by using the iron-chromium-aluminum alloy continuous casting slab, the hot coil of the iron-chromium-aluminum alloy is easy to unwind and break when the heating temperature of the continuous casting slab and the coiling temperature of the steel coil are not properly controlled, mainly because the brittle-ductile transition temperature (which can be obtained by detecting the transverse U-shaped 0-90 ℃ impact value of the hot rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab) of the steel coil is higher than 60 ℃. However, no technique exists for producing hot-rolled steel coils with the width of 200 mm-2050 mm and the thickness of 1.2 mm-8.0 mm by hot rolling of iron-chromium-aluminum alloy continuous casting slabs.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a production method of an iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil, which can produce the hot rolled steel coil with the width of 200-2050 mm and the thickness of 2.0-8.0 mm, and simultaneously reduces the brittle-tough transition temperature of the steel coil to be less than 60 ℃, thereby eliminating the problem of uncoiling and strip breakage of the iron-chromium-aluminum alloy hot coil and widening the application range of the iron-chromium-aluminum alloy strip.
The production method of the iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil comprises the following steps:
step 1: loading an iron-chromium-aluminum alloy continuous casting plate blank into a heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before being loaded into the furnace is controlled to be more than or equal to 50 ℃;
step 2: heating the heating furnace to 1100-1200 ℃ within 0.5-6 hours, and then preserving the heat for 30-250 minutes;
and step 3: taking the iron-chromium-aluminum alloy continuous casting slab out of the heating furnace for hot rolling, controlling the process temperature and the finish rolling temperature of the hot rolled steel coil to be 600-1200 ℃, and controlling the thickness of the hot rolled steel strip to be 1.2-8.0 mm;
and 4, step 4: after hot rolling, spraying water to cool the steel strip, reducing the surface temperature of the steel strip to 200-450 ℃ within 15-30 seconds, and then coiling the steel strip.
Preferably, in the above step 3, the iron-chromium-aluminum alloy continuous casting slab is hot-rolled using a hot continuous rolling mill or a steckel mill.
Preferably, in the above method for producing a hot-rolled coil of iron-chromium-aluminum alloy continuously cast slab, an iron-chromium-aluminum alloy continuously cast slab with a mark of 1Cr13Al4, 0Cr21Al5, 0Cr21Al6, 0Cr25Al5, 0Cr27Al7Mo2, etc. is used as a raw material, and the specification of the iron-chromium-aluminum alloy continuously cast slab is as follows: the thickness is 120-250 mm, and the width is 200-2050 mm.
As a specific implementation mode, in the method for producing the hot-rolled steel coil from the iron-chromium-aluminum alloy continuous casting slab, the iron-chromium-aluminum alloy continuous casting slab with the mark of 0Cr21Al6 is used as a raw material, and the chemical components of the iron-chromium-aluminum alloy continuous casting slab comprise the following components in percentage by mass: c: 0.008%, Si: 0.21%, Mn: 0.10%, Al: 5.5%, Cr: 19.8%, La: 0.07%, Ti: 0.11%, Nb: 0.09%, P: 0.021%, S: 0.001% and the balance of Fe and other inevitable impurities, wherein the specification of the iron-chromium-aluminum alloy continuous casting slab is as follows: thickness 180mm, width 1080mm, wherein: in the step 1, the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before charging is controlled to be 168-320 ℃; in the step 2, the heating furnace is heated to 1120-1180 ℃ within 3 hours, and then the temperature is kept for 50 minutes; in the step 3, a hot continuous rolling mill is adopted to carry out hot rolling on the iron-chromium-aluminum alloy continuous casting plate blank, the process temperature and the final rolling temperature of a hot rolled steel coil are controlled to be 720-1185 ℃, and the thickness of the hot rolled steel strip is controlled to be 2.8 mm; in the step 4, the surface temperature of the steel strip is reduced to 275-388 ℃ within 15 seconds, and then the steel strip is coiled into a coil.
As a specific implementation mode, in the method for producing the hot-rolled steel coil from the iron-chromium-aluminum alloy continuous casting slab, the iron-chromium-aluminum alloy continuous casting slab with the mark of 1Cr13Al4 is used as a raw material, and the chemical components of the iron-chromium-aluminum alloy continuous casting slab comprise the following components in percentage by mass: c: 0.008%, Si: 0.35%, Mn: 0.08%, Al: 4.58%, Cr: 13.86%, Ti: 0.44%, P: 0.012%, S: 0.001% and the balance of Fe and other inevitable impurities, wherein the specification of the iron-chromium-aluminum alloy continuous casting slab is as follows: thickness 200mm, width 1800mm, wherein: in the step 1, the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before charging is controlled to be 212-485 ℃; in the step 2, the heating furnace is heated to 1120-1200 ℃ within 4 hours and 10 minutes, and then the temperature is kept for 80 minutes; in the step 3, a steckel mill is adopted to carry out hot rolling on the iron-chromium-aluminum alloy continuous casting plate blank, the process temperature and the final rolling temperature of a hot rolled steel coil are controlled to be 680-1190 ℃, and the thickness of the hot rolled steel strip is controlled to be 3.3 mm; in the step 4, the surface temperature of the steel strip is reduced to 292-390 ℃ within 30 seconds, and then the steel strip is coiled into a coil.
By utilizing the production method of the hot rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab, the brittleness-toughness transition temperature of the steel coil can be reduced to be less than 60 ℃ by controlling the charging temperature of the iron-chromium-aluminum alloy continuous casting slab, the heating speed and temperature of the heating furnace, the heat preservation time, the process temperature and the finish rolling temperature of the hot rolled steel coil and the like, so that the problem of uncoiling and strip breakage of the iron-chromium-aluminum alloy hot coil is solved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The production method of the iron-chromium-aluminum alloy continuous casting plate blank hot rolled steel coil takes the iron-chromium-aluminum alloy continuous casting plate blank with the marks of 1Cr13Al4, 0Cr21Al5, 0Cr21Al6, 0Cr25Al5, 0Cr27Al7Mo2 and the like as raw materials, and the specification of the iron-chromium-aluminum alloy continuous casting plate blank is as follows: the thickness is 120-250 mm, the width is 200-2050 mm, and the production method of the iron-chromium-aluminum alloy continuous casting slab hot-rolled steel coil comprises the following steps:
step 1: loading an iron-chromium-aluminum alloy continuous casting plate blank into a heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before being loaded into the furnace is controlled to be more than or equal to 50 ℃;
step 2: heating the heating furnace to 1100-1200 ℃ within 0.5-6 hours, and then preserving the heat for 30-250 minutes;
and step 3: taking the iron-chromium-aluminum alloy continuous casting slab out of the heating furnace for hot rolling, controlling the process temperature and the finish rolling temperature of the hot rolled steel coil to be 600-1200 ℃, and controlling the thickness of the hot rolled steel strip to be 1.2-8.0 mm;
and 4, step 4: after hot rolling, spraying water to cool the steel strip, reducing the surface temperature of the steel strip to 200-450 ℃ within 15-30 seconds, and then coiling the steel strip.
Preferably, in the above step 3, the iron-chromium-aluminum alloy continuous casting slab is hot-rolled using a hot continuous rolling mill or a steckel mill.
The iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil produced by the production method of the iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil is tested to have a transverse U-shaped 0-90 ℃ impact value perpendicular to the rolling direction, and the steel coil brittle-tough transition temperature is less than 60 ℃, so that the steel coil can be smoothly opened in subsequent procedures without strip breakage.
The method for producing hot rolled coils of iron-chromium-aluminum alloy continuous cast slabs according to the present invention will be described in detail with reference to the following specific examples.
Example 1
The method takes an iron-chromium-aluminum alloy continuous casting slab with the mark of 0Cr21Al6 as a raw material, and comprises the following chemical components in percentage by mass: c: 0.008%, Si: 0.21%, Mn: 0.10%, Al: 5.5%, Cr: 19.8%, La: 0.07%, Ti: 0.11%, Nb: 0.09%, P: 0.021%, S: 0.001 percent, and the balance of Fe and other inevitable impurities, wherein the specification of the iron-chromium-aluminum alloy continuous casting slab is as follows: the thickness is 180mm, and the width is 1080 mm.
The method for producing the hot-rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab in the embodiment 1 comprises the following steps:
(1) loading the iron-chromium-aluminum alloy continuous casting slab into a heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before being loaded into the furnace is controlled to be 168-320 ℃;
(2) heating the heating furnace to 1120-1180 ℃ within 3 hours, and then preserving heat for 50 minutes;
(3) taking the iron-chromium-aluminum alloy continuous casting slab out of the heating furnace, and carrying out hot rolling by using a hot continuous rolling mill, wherein the process temperature and the finish rolling temperature of a hot rolled steel coil are controlled to be 720-1185 ℃, and the thickness of the hot rolled steel strip is controlled to be 2.8 mm;
(4) and after hot rolling, spraying water to cool the steel strip, reducing the surface temperature of the steel strip to 275-388 ℃ within 15 seconds, and then coiling the steel strip into a coil.
The impact value of the transverse U-shape of 0-90 ℃ perpendicular to the rolling direction of the iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil produced by the production method of the iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil in the embodiment 1 is detected, the brittle-tough transition temperature of the steel coil is 45 ℃, the steel coil can be smoothly opened in the subsequent process, and the strip breakage phenomenon cannot occur.
Example 2
The method takes an iron-chromium-aluminum alloy continuous casting slab with the mark of 1Cr13Al4 as a raw material, and comprises the following chemical components in percentage by mass: c: 0.008%, Si: 0.35%, Mn: 0.08%, Al: 4.58%, Cr: 13.86%, Ti: 0.44%, P: 0.012%, S: 0.001 percent, and the balance of Fe and other inevitable impurities, wherein the specification of the iron-chromium-aluminum alloy continuous casting slab is as follows: the thickness is 200mm, and the width is 1800 mm.
The method for producing the hot-rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab in the embodiment 2 includes the following steps:
(1) loading the iron-chromium-aluminum alloy continuous casting slab into a heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting slab before being loaded into the furnace is controlled to be 212-485 ℃;
(2) heating the heating furnace to 1120-1200 ℃ within 4 hours and 10 minutes, and then preserving heat for 80 minutes;
(3) taking out the iron-chromium-aluminum alloy continuous casting slab from the heating furnace, and carrying out hot rolling by using a steckel mill, wherein the process temperature and the final rolling temperature of a hot rolled steel coil are controlled to be 680-1190 ℃, and the thickness of the hot rolled steel strip is controlled to be 3.3 mm;
(4) and after hot rolling, spraying water to cool the steel strip, reducing the surface temperature of the steel strip to 292-390 ℃ within 30 seconds, and then coiling to form a coil.
The impact value of the transverse U-shape of 0-90 ℃ perpendicular to the rolling direction of the iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil produced by the production method of the iron-chromium-aluminum alloy continuous casting slab hot rolled steel coil in the embodiment 2 is detected, the brittle-tough transition temperature of the steel coil is 35 ℃, the steel coil can be smoothly opened in the subsequent process, and the strip breakage phenomenon cannot occur.
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or alterations do not depart from the spirit of the invention.
Claims (5)
1. The production method of the hot rolled steel coil of the iron-chromium-aluminum alloy continuous casting slab is characterized by comprising the following steps of:
step 1: loading an iron-chromium-aluminum alloy continuous casting plate blank into a heating furnace, wherein the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before being loaded into the furnace is controlled to be more than or equal to 50 ℃;
step 2: heating the heating furnace to 1100-1200 ℃ within 0.5-6 hours, and then preserving the heat for 30-250 minutes;
and step 3: taking the iron-chromium-aluminum alloy continuous casting slab out of the heating furnace for hot rolling, controlling the process temperature and the finish rolling temperature of the hot rolled steel coil to be 600-1200 ℃, and controlling the thickness of the hot rolled steel strip to be 1.2-8.0 mm;
and 4, step 4: after hot rolling, spraying water to cool the steel strip, reducing the surface temperature of the steel strip to 200-450 ℃ within 15-30 seconds, and then coiling the steel strip.
2. The method for producing a hot-rolled coil of iron-chromium-aluminum alloy continuously cast slab as claimed in claim 1, wherein in said step 3, the iron-chromium-aluminum alloy continuously cast slab is hot-rolled using a hot continuous rolling mill or a steckel mill.
3. The method for producing the hot-rolled steel coil from the iron-chromium-aluminum alloy continuous casting slab as claimed in claim 1, wherein the iron-chromium-aluminum alloy continuous casting slab with the mark numbers of 1Cr13Al4, 0Cr21Al5, 0Cr21Al6, 0Cr25Al5, 0Cr27Al7Mo2 and the like is used as a raw material, and the specification of the iron-chromium-aluminum alloy continuous casting slab is 120-250 mm in thickness and 200-2050 mm in width.
4. The method for producing the hot-rolled steel coil from the iron-chromium-aluminum alloy continuous casting slab as claimed in claim 1, wherein the iron-chromium-aluminum alloy continuous casting slab with the mark of 0Cr21Al6 is used as a raw material, and the chemical components of the iron-chromium-aluminum alloy continuous casting slab comprise the following components in percentage by mass: c: 0.008%, Si: 0.21%, Mn: 0.10%, Al: 5.5%, Cr: 19.8%, La: 0.07%, Ti: 0.11%, Nb: 0.09%, P: 0.021%, S: 0.001% and the balance of Fe and other inevitable impurities, wherein the specification of the iron-chromium-aluminum alloy continuous casting slab is as follows: thickness 180mm, width 1080mm, wherein:
in the step 1, the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before charging is controlled to be 168-320 ℃;
in the step 2, the heating furnace is heated to 1120-1180 ℃ within 3 hours, and then the temperature is kept for 50 minutes;
in the step 3, a hot continuous rolling mill is adopted to carry out hot rolling on the iron-chromium-aluminum alloy continuous casting plate blank, the process temperature and the final rolling temperature of a hot rolled steel coil are controlled to be 720-1185 ℃, and the thickness of the hot rolled steel strip is controlled to be 2.8 mm;
in the step 4, the surface temperature of the steel strip is reduced to 275-388 ℃ within 15 seconds, and then the steel strip is coiled into a coil.
5. The method for producing the hot-rolled steel coil from the iron-chromium-aluminum alloy continuous casting slab as claimed in claim 1, wherein the iron-chromium-aluminum alloy continuous casting slab with the mark of 1Cr13Al4 is used as a raw material, and the chemical components of the iron-chromium-aluminum alloy continuous casting slab comprise the following components in percentage by mass: c: 0.008%, Si: 0.35%, Mn: 0.08%, Al: 4.58%, Cr: 13.86%, Ti: 0.44%, P: 0.012%, S: 0.001% and the balance of Fe and other inevitable impurities, wherein the specification of the iron-chromium-aluminum alloy continuous casting slab is as follows: thickness 200mm, width 1800mm, wherein:
in the step 1, the surface temperature of the iron-chromium-aluminum alloy continuous casting plate blank before charging is controlled to be 212-485 ℃;
in the step 2, the heating furnace is heated to 1120-1200 ℃ within 4 hours and 10 minutes, and then the temperature is kept for 80 minutes;
in the step 3, a steckel mill is adopted to carry out hot rolling on the iron-chromium-aluminum alloy continuous casting plate blank, the process temperature and the final rolling temperature of a hot rolled steel coil are controlled to be 680-1190 ℃, and the thickness of the hot rolled steel strip is controlled to be 3.3 mm;
in the step 4, the surface temperature of the steel strip is reduced to 292-390 ℃ within 30 seconds, and then the steel strip is coiled into a coil.
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