CN113621888B - 825 iron-nickel-based alloy hot continuous rolling plate rolling preparation process - Google Patents

825 iron-nickel-based alloy hot continuous rolling plate rolling preparation process Download PDF

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CN113621888B
CN113621888B CN202110911986.8A CN202110911986A CN113621888B CN 113621888 B CN113621888 B CN 113621888B CN 202110911986 A CN202110911986 A CN 202110911986A CN 113621888 B CN113621888 B CN 113621888B
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rolling
heating
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CN113621888A (en
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倪新春
蔡德智
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Shandong Shengyang Metal Technology Co Ltd
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Shandong Shengyang Metal Technology Co Ltd
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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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B21B1/26—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 in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/72—Rear end control; Front end control
    • 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
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • 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
    • B21B45/02—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 for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0287—Cleaning devices removing solid particles, e.g. dust, rust
    • 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
    • B21B45/04—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 for de-scaling, e.g. by brushing
    • B21B45/06—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 for de-scaling, e.g. by brushing of strip material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • 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
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/086—Iron or steel solutions containing HF

Abstract

The invention discloses a 825 iron-nickel based alloy hot continuous rolling plate rolling preparation process, which comprises the following chemical components in percentage by weight, that is, C is less than or equal to 0.03%, Mn is less than or equal to 1.00%, Ni: 38-46%, Mo is less than or equal to 4%, Si is less than or equal to 0.5%, Cr: 19.5-23.5%, N: 0.18 to 0.22%, Cu: 1.5-3.0%, P is less than or equal to 0.03%, S is less than or equal to 0.01%, Al is less than or equal to 0.2%, Ti: 0.6-1.2% of Fe and other inevitable impurities as the rest; the process comprises the following steps: 1) preparing the raw materials of the components into a heating furnace for heating; 2) rough rolling; 3) fine rolling; 4) coiling; 5) uncoiling and welding; 6) annealing: 7) breaking phosphorus and performing shot blasting; 8) acid washing: 9) and (5) drying. The invention has the advantages of low energy consumption, high production efficiency, stable batch, high yield, high dimensional accuracy and the like.

Description

825 iron-nickel-based alloy hot continuous rolling plate rolling preparation process
Technical Field
The invention belongs to the technical field of rolling of iron-nickel-based alloy plates, and particularly relates to a preparation process for rolling a 825 iron-nickel-based alloy hot continuous rolled plate.
Background
825 Fe-Ni based alloy is a Ni-Fe-Cr solid solution strengthening Ni-based corrosion resistant alloy added with Mo, Cu and Ti, which is developed for use in two media of reducibility and oxidizability, has the capability of resisting chloride ion stress corrosion cracking, pitting corrosion, crevice corrosion and a plurality of corrosive solutions, and also has good sulfuric acid resistance, phosphoric acid resistance and certain corrosion resistance to various acid solutions; the common 825 hot rolled plate processing mode is single-stand reversible rolling mill rolling (sheet rolling), and compared with the single-stand reversible rolling mill rolling, the method has the defects of high energy consumption, unstable quality of the same batch, low yield and the like;
meanwhile, the phenomenon of warping of the plate often occurs in the plate rolling transmission process, the warping head is too high, and the warping head can be pushed against other mechanisms, so that the rolling of the next rolling mechanism is influenced, and the warping head part of the plate is required to be flattened.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a preparation process for a 825 iron-nickel based alloy hot continuous rolling plate, which has the advantages of low energy consumption, high production efficiency, stable batch, high yield, high dimensional precision and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
a825 Fe-Ni based alloy hot continuous rolling plate rolling preparation process comprises the following chemical components by weight percent of less than or equal to 0.03 percent of C, less than or equal to 1.00 percent of Mn, and Ni: 38-46%, Mo is less than or equal to 4%, Si is less than or equal to 0.5%, Cr: 19.5-23.5%, N: 0.18 to 0.22%, Cu: 1.5-3.0%, P is less than or equal to 0.03%, S is less than or equal to 0.01%, Al is less than or equal to 0.2%, Ti: 0.6-1.2% of Fe and other inevitable impurities as the rest;
the process comprises the following steps:
1) preparing the raw materials of the components into a heating furnace for heating; the heating step is divided into a preheating section, a heating section and a soaking section in sequence; the thickness of the slab is 210-230 mm; a preheating section, the temperature is controlled at 600-700 ℃, and the heating time is 75-80 min; after preheating, entering a heating section, controlling the temperature at 1120-1140 ℃ and the heating time to be 40-55 min; after the first heating stage is finished, the second heating stage is carried out, the temperature is controlled at 1250-; after the heating section is finished, the mixture enters a soaking section, the temperature is controlled at 1260 and 1280 ℃, and the heating time is 35-45 min; the total in-furnace time is 185-210 min;
2) rough rolling: the heated blank is conveyed to a roughing mill through a conveying roller, and a corresponding heat-insulating cover is arranged on a conveying device; after the intermediate blank is subjected to rough rolling of a rough rolling mill for a plurality of passes, the thickness of the intermediate blank is 20-30 mm;
3) finish rolling and warping flattening: the steel plate is conveyed to a finish rolling mechanism, and the finish rolling mechanism rolls by adopting seven racks; a warping head flattening device is arranged between the racks to flatten the warping head part of the board; the rolling temperature of the finish rolling is 1040-1060 ℃; the finish rolling finishing temperature is more than 950 ℃; the reduction rate of each finish rolling stand is 22-25%, 24-28%, 23-25%, 21-24%, 19-23%, 15.5-17% and 15-18% respectively;
the warped head flattening device is fixed on the transmission frame; a rotating mechanism, an arc-shaped plate and a press roller are arranged in the warping head flattening device; the rotating mechanism comprises a rotating roller I, a fixed arm and a rotating roller II; two ends of the rotating roller I are respectively provided with a rotating roller II; the fixing arms are provided with two groups and symmetrically fixed at two ends of the rotating roller I, and a plurality of fixing arms are arranged in each group of fixing arms and uniformly fixed on the rotating roller I; one end of the fixed arm is provided with a clamping block and is fixed through a bolt; a fixed shaft is arranged on the inner side of the fixed arm, and a fixed cap is arranged on the fixed shaft and is fixed with the fixed shaft through a bolt; rotating rollers II at two ends of the rotating roller I penetrate through the fixing seat II and the fixing seat I and are movably connected through bearings; a rotating roller II at one end of the fixed seat I is provided with a gear and is connected with a gear at the shaft end of the motor through a chain; the two ends of the compression roller are provided with rotating shafts, the compression roller is movably connected with one end of the fixed arm through the rotating shafts and the bearings, and the compression roller and the bearings are fixed through fixture blocks; the two ends of the arc-shaped plate are movably connected with the fixed arms, the arc-shaped plate is positioned above the press roller, and the arc-shaped plate is provided with a scraper knife; the clamping block is provided with an inserting block which is matched with the fixed arm;
4) coiling: after finish rolling, the steel enters a coiling mechanism for coiling;
5) uncoiling: unreeling the plate coil through an uncoiler:
6) welding: two adjacent groups of steel plates are welded and fixed through a welding mechanism, so that the whole pickling of the steel plates is facilitated;
7) annealing: annealing the iron-nickel base alloy plate by an annealing mechanism, and then cooling by water;
8) breaking phosphorus and performing shot blasting; performing shot blasting treatment on the annealed iron-nickel-based alloy plate by using a shot blasting machine;
9) acid washing: pickling the iron-nickel base alloy plate by using a pickling mechanism to remove oxide skins; pickling the iron-nickel base alloy plate by using a pickling mechanism to remove oxide skins; the acid washing process is provided with a mixed acid first section and a mixed acid second section; mixed acid first stage HNO3The concentration is 45 +/-5 g/L, the HF concentration is 7 +/-1 g/L, the metal ion is less than 35g/L, and the temperature is 40 +/-5 ℃; mixed acid two-stage HNO3The concentration is 65 +/-5 g/L, the HF concentration is less than 1.0g/L, the metal ions are less than 30g/L, and the temperature is 30 +/-5 ℃;
10) drying: and cleaning the iron-nickel base alloy plate after acid cleaning by using a cleaning mechanism, and then drying the iron-nickel base alloy plate by using a drying system and then coiling the iron-nickel base alloy plate.
Compared with the prior art, the invention has the beneficial effects that:
1) the method produces 825 coil on the hot continuous rolling production line, and then carries out solid solution pickling on the coil, has the advantages of low energy consumption, high production efficiency, stable batch, high yield, high dimensional precision and the like, and can obtain the 825 hot rolled pickled coil with more excellent quality data.
2) Flattening the raised part of the plate by using a raised flattening device in the rolling process; the height of the rotating mechanism is controlled through the height control mechanism so as to meet the height requirement of flattening the warping head of the plate, then the rotating mechanism is driven to rotate through the motor, and then the pressing roller is driven to repeatedly rotate and flatten the warping head of the plate.
Drawings
FIG. 1 is a schematic structural diagram of a warping leveling device in an 825 Fe-Ni based alloy hot continuous rolled plate coil according to the present invention;
FIG. 2 is a first schematic structural diagram of the rotating mechanism in FIG. 1;
FIG. 3 is a schematic structural diagram II of the rotating mechanism in FIG. 1
In the figure: 1. a frame; 2. a transmission rack; 3. a motor; 4. a height control mechanism; 5. a rotating mechanism; 501. rotating the roller I; 502. a fixed arm; 5021. a clamping block; 50211. inserting a block; 5022. a fixed shaft; 50221. a fixing cap; 503. a rotating roller II; 6. a fixed mount; 7. a compression roller; 8. an arc-shaped plate; 9. a nickel-based alloy sheet.
Detailed Description
For the convenience of understanding of those skilled in the art, the technical solution of the present invention will be further described in detail with reference to fig. 1 to 3.
Example 1:
a825 iron-nickel base alloy hot continuous rolling plate coiling preparation process comprises the following chemical components, by weight, 0.015% of C, 0.52% of Mn, 39.166% of Ni, 3.25% of Mo, 0.40% of Si, 20.45% of Cr, 0.192% of N, 2.0% of Cu, 0.022% of P, 0.003% of S, 0.12% of Al, 0.98% of Ti, and the balance of Fe and other inevitable impurities;
the process comprises the following steps:
1) preparing the raw materials of the components into a heating furnace for heating; the heating step is divided into a preheating section, a heating section and a soaking section in sequence; the thickness of the plate blank is 220 m; a preheating section, wherein the temperature is controlled at 645 ℃, and the heating time is 78 min; heating for a period of time after preheating is finished, wherein the temperature is controlled to be 1125 ℃, and the heating time is 42 min; after the first heating stage is finished, the second heating stage is carried out, the temperature is controlled at 1285 ℃, and the heating time is 38 min; after the heating section is finished, the mixture enters a soaking section, the temperature is controlled to be 1270 ℃, and the heating time is 35 min; the total in-furnace time is 193 min;
2) rough rolling: the heated blank is conveyed to a roughing mill through a conveying roller, and a corresponding heat-insulating cover is arranged on a conveying device; after the blank is subjected to rough rolling of a rough rolling mill for a plurality of passes, the thickness of the intermediate blank is 24 mm;
3) finish rolling and warping flattening: the steel plate is conveyed to a finish rolling mechanism, and the finish rolling mechanism rolls by adopting seven racks; a warping head flattening device is arranged between the racks to flatten the warping head part of the board; the finish rolling initial rolling temperature is 1055 ℃; the finish rolling finishing temperature is 970 ℃; the reduction rate of each finish rolling stand is 23%, 27.8%, 23.5%, 23%, 21.4%, 16% and 15.5% respectively;
the warping head flattening device is fixed on the transmission frame 2; a rotating mechanism 5, an arc-shaped plate 8 and a press roller 7 are arranged in the warping head flattening device; the rotating mechanism 5 comprises a rotating roller I501, a fixed arm 502 and a rotating roller II 503; two ends of the rotating roller I501 are respectively provided with a rotating roller II 503; two groups of fixed arms 502 are arranged and symmetrically fixed at two ends of the rotating roller I501, and a plurality of fixed arms 502 are arranged in each group of fixed arms 502 and uniformly fixed on the rotating roller I501; a fixture block 5021 is arranged at one end of the fixing arm 502 and is fixed through a bolt; a fixing shaft 5022 is arranged on the inner side of the fixing arm 502, and a fixing cap 50221 is arranged on the fixing shaft 5022 and is fixed with each other through bolts; rotating rollers II 503 at two ends of the rotating roller I501 penetrate through the fixing seat II and the fixing seat I and are movably connected through bearings; a rotating roller II at one end of the fixed seat I is provided with a gear and is connected with a shaft end gear of the motor 3 through a chain; the motor 3 provides power to drive the rotating roller I501 to rotate; two ends of the compression roller 7 are provided with rotating shafts, the compression roller 7 is movably connected with one end of the fixing arm 502 through the rotating shafts and the bearings, the compression roller 7 and the bearings are fixed through the fixture block 5021, and meanwhile, the fixture block 5021 is convenient for replacement and maintenance of the compression roller 7; the two ends of the arc-shaped plate 8 are movably connected with the fixing arms 502, the arc-shaped plate 8 is positioned above the press roller 7, and a scraper knife is arranged on the arc-shaped plate 8; the latch 5021 is provided with an insert 50211 which is engaged with the fixed arm 502, so that the latch 5021 is convenient to assemble and disassemble.
When the nickel-based alloy plate 9 is rolled by a rolling mechanism on the rack 1 and is transmitted on the transmission frame 2, the end part of the nickel-based alloy plate 9 can be warped, then the height of the rotating mechanism 5 on the fixing frame 6 is controlled by the height control mechanism 4, then the rotating mechanism 5 is driven by the motor 3 to rotate so as to drive the pressing roller 7 to level the warped head part, and then sundries such as oxide skins adhered on the pressing roller 7 are shoveled and cleaned by the shovel blade on the arc-shaped plate 8.
4) Coiling: after finish rolling, the steel enters a coiling mechanism for coiling;
5) uncoiling: unreeling the plate coil through an uncoiler:
6) welding: two adjacent groups of steel plates are welded and fixed through a welding mechanism, so that the whole pickling of the steel plates is facilitated;
7) annealing: annealing the iron-nickel base alloy plate by an annealing mechanism, and then cooling by water;
8) breaking phosphorus and performing shot blasting; performing shot blasting treatment on the annealed iron-nickel-based alloy plate by using a shot blasting machine;
9) acid washing: pickling the iron-nickel base alloy plate by using a pickling mechanism to remove oxide skins; pickling the iron-nickel base alloy plate by using a pickling mechanism to remove oxide skins; the acid washing process is provided with a mixed acid first section and a mixed acid second section; mixed acid first stage HNO3The concentration is 46.2g/L, the HF concentration is 7.2g/L, the metal ion is 32g/L, and the temperature is 38 ℃; mixed acid two-stage HNO3The concentration is 61.5g/L, the HF concentration is 0.8g/L, the metal ion concentration is 24.5g/L, and the temperature is 32.5 ℃;
10) drying: and cleaning the iron-nickel base alloy plate after acid cleaning by using a cleaning mechanism, and then drying the iron-nickel base alloy plate by using a drying system and then coiling the iron-nickel base alloy plate.
Example 2:
the difference compared with example 1 is:
in the preheating section in the step 1), the temperature is controlled at 680 ℃, and the heating time is 75 min; heating for a period of time after preheating is finished, wherein the temperature is controlled to be 1135 ℃, and the heating time is 40 min; after the first heating stage is finished, the second heating stage is carried out, the temperature is controlled to 1275 ℃, and the heating time is 35 min; after the heating section is finished, the material enters a soaking section, the temperature is controlled at 1265 ℃, and the heating time is 38 min; the total furnace time is 188 min;
finish rolling in step 3): the steel plate is conveyed to a finish rolling mechanism, and the finish rolling mechanism rolls by adopting seven racks; the finish rolling initial rolling temperature is 1045 ℃; the finish rolling temperature is 955 ℃; the reduction rate of each finish rolling stand is 22.5 percent, 28 percent, 23.25 percent, 22.5 percent, 22 percent, 16.2 percent and 15.8 percent respectively;
example 3:
the difference compared with example 1 is:
in the preheating section in the step 1), the temperature is controlled at 600-700 ℃, and the heating time is 73 min; after preheating, entering a heating section, controlling the temperature at 1120-; after the first heating stage is finished, the second heating stage is carried out, the temperature is controlled at 1250-; after the heating section is finished, the mixture enters a soaking section, the temperature is controlled at 1260 and 1280 ℃, and the heating time is 42 min; the total furnace time is 200.5 min;
finish rolling in step 3): the steel plate is conveyed to a finish rolling mechanism, and the finish rolling mechanism rolls by adopting seven racks; the finish rolling initial rolling temperature is 1058 ℃; the finish rolling finishing temperature is 968 ℃; the reduction rate of each finish rolling stand is 23.35 percent, 27.85 percent, 24.2 percent, 23.5 percent, 20.55 percent, 16.5 percent and 16 percent respectively;
mechanical property detection is carried out on the samples of the embodiment 1, the embodiment 2 and the embodiment 3 according to GB/T2054-2013, and the obtained results are shown in a table I:
table one:
examples Tensile strength Mpa Specified plastic elongation strength Mpa Elongation after fracture% Conclusion
1 624 346 42 Qualified
2 635 339 40.5 Qualified
3 628 351 43 Qualified
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.

Claims (2)

1. A825 iron-nickel based alloy hot continuous rolling plate rolling preparation process is characterized in that the chemical components by weight percentage are that C is less than or equal to 0.03%, Mn is less than or equal to 1.00%, Ni: 38-46%, Mo is less than or equal to 4%, Si is less than or equal to 0.5%, Cr: 19.5-23.5%, N: 0.18 to 0.22%, Cu: 1.5-3.0%, P is less than or equal to 0.03%, S is less than or equal to 0.01%, Al is less than or equal to 0.2%, Ti: 0.6-1.2% of Fe and other inevitable impurities as the rest;
the process comprises the following steps:
1) preparing the raw materials of the components into a heating furnace for heating; the heating step is divided into a preheating section, a heating section and a soaking section in sequence; the thickness of the slab is 210-230 mm; a preheating section, the temperature is controlled at 600-700 ℃, and the heating time is 75-80 min; after preheating, entering a heating section, controlling the temperature at 1120-1140 ℃ and the heating time to be 40-55 min; after the first heating stage is finished, the second heating stage is carried out, the temperature is controlled at 1250-; after the heating section is finished, the mixture enters a soaking section, the temperature is controlled at 1260 and 1280 ℃, and the heating time is 35-45 min; the total in-furnace time is 185-210 min;
2) rough rolling: the heated blank is conveyed to a roughing mill through a conveying roller, and a corresponding heat-insulating cover is arranged on a conveying device; after the intermediate blank is subjected to rough rolling of a rough rolling mill for a plurality of passes, the thickness of the intermediate blank is 20-30 mm;
3) finish rolling and warping flattening: the steel plate is conveyed to a finish rolling mechanism, and the finish rolling mechanism rolls by adopting seven racks; a warping head flattening device is arranged between the racks to flatten the warping head part of the board; the rolling temperature of the finish rolling is 1040-1060 ℃; the finish rolling finishing temperature is more than 950 ℃; the reduction rate of each finish rolling stand is 22-25%, 24-28%, 23-25%, 21-24%, 19-23%, 15.5-17% and 15-18% respectively;
4) coiling: after finish rolling, the steel enters a coiling mechanism for coiling;
5) uncoiling: unreeling the plate coil through an uncoiler:
6) welding: two adjacent groups of steel plates are welded and fixed through a welding mechanism, so that the whole pickling of the steel plates is facilitated;
7) annealing: annealing the iron-nickel base alloy plate by an annealing mechanism, and then cooling by water;
8) breaking phosphorus and performing shot blasting; performing shot blasting treatment on the annealed iron-nickel-based alloy plate by using a shot blasting machine;
9) acid washing: the iron-nickel base alloy plate is pickled by an acid pickling mechanism to remove oxide skin, and the acid pickling process is provided with a mixed acid first section and a mixed acid second section;
10) drying: cleaning the iron-nickel-based alloy plate after acid cleaning through a cleaning mechanism, drying the iron-nickel-based alloy plate through a drying system, and then coiling;
the warped head flattening device is fixed on the transmission frame; a rotating mechanism, an arc-shaped plate and a press roller are arranged in the warping head flattening device; the rotating mechanism comprises a rotating roller I, a fixed arm and a rotating roller II; two ends of the rotating roller I are respectively provided with a rotating roller II; the fixing arms are provided with two groups and symmetrically fixed at two ends of the rotating roller I, and a plurality of fixing arms are arranged in each group of fixing arms and uniformly fixed on the rotating roller I; one end of the fixed arm is provided with a clamping block and is fixed through a bolt; a fixed shaft is arranged on the inner side of the fixed arm, and a fixed cap is arranged on the fixed shaft and is fixed with the fixed shaft through a bolt; rotating rollers II at two ends of the rotating roller I penetrate through the fixing seat II and the fixing seat I and are movably connected through bearings; a rotating roller II at one end of the fixed seat I is provided with a gear and is connected with a gear at the shaft end of the motor through a chain; the two ends of the compression roller are provided with rotating shafts, the compression roller is movably connected with one end of the fixed arm through the rotating shafts and the bearings, and the compression roller and the bearings are fixed through fixture blocks; the two ends of the arc-shaped plate are movably connected with the fixed arms, the arc-shaped plate is positioned above the press roller, and the arc-shaped plate is provided with a scraper knife; the clamping block is provided with an inserting block which is matched with the fixed arm.
2. The process according to claim 1, wherein in step 9) the acid-mixed first-stage HNO is added3The concentration is 45 +/-5 g/L, the HF concentration is 7 +/-1 g/L, the metal ion is less than 35g/L, and the temperature is 40 +/-5 ℃; mixed acid two-stage HNO3The concentration is 65 +/-5 g/L, the concentration of HF is less than 1.0g/L, the concentration of metal ions is less than 30g/L, and the temperature is 30 +/-5 ℃.
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CN104525611A (en) * 2014-11-29 2015-04-22 首钢总公司 Nichrome and carbon steel composite board as well as production method thereof
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