CN114558888A - Solution-free annealing production method for stainless steel hot-rolled steel strip - Google Patents
Solution-free annealing production method for stainless steel hot-rolled steel strip Download PDFInfo
- Publication number
- CN114558888A CN114558888A CN202210081570.2A CN202210081570A CN114558888A CN 114558888 A CN114558888 A CN 114558888A CN 202210081570 A CN202210081570 A CN 202210081570A CN 114558888 A CN114558888 A CN 114558888A
- Authority
- CN
- China
- Prior art keywords
- steel strip
- heat
- hot
- solution
- stainless steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 238000000137 annealing Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 22
- 239000010935 stainless steel Substances 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 52
- 238000005096 rolling process Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000004321 preservation Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000000243 solution Substances 0.000 claims abstract description 14
- 238000005098 hot rolling Methods 0.000 claims abstract description 10
- 239000006104 solid solution Substances 0.000 claims abstract description 9
- 230000001502 supplementing effect Effects 0.000 claims abstract description 7
- 238000005554 pickling Methods 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 12
- 238000005422 blasting Methods 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 2
- 239000003034 coal gas Substances 0.000 claims 1
- 239000003345 natural gas Substances 0.000 claims 1
- 238000004886 process control Methods 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005406 washing Methods 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000005482 strain hardening Methods 0.000 description 5
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Images
Classifications
-
- 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
- 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
-
- 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
- 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
-
- 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
- B21B45/08—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 hydraulically
-
- 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
-
- 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
- B21B2015/0057—Coiling the rolled product
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention belongs to the field of stainless steel rolling and heat treatment processes, and provides a solution-free annealing production method for a stainless steel hot-rolled steel strip. Closing a laminar cooling flow based on a conventional hot rolling process, and additionally arranging a heat preservation and heat compensation device, a heat preservation cover and a quick cooling device; the solid solution heating and rapid cooling links in the solid solution annealing and acid washing process are cancelled, and acid washing is directly carried out. The finishing temperature is controlled to be 1000-1100 ℃ through heat supplementing and heat preservation of the intermediate blank, the hardened structure is softened through an additional heat preservation cover, the structure is rapidly cooled to be below 500 ℃ for coiling, and the corrosion resistance is ensured through a sensitive temperature range in which Cr carbide is precipitated. The hot rolled steel strip obtains the corrosion resistance and the mechanical property similar to those of a continuous solution annealing product through the measures, and is directly pickled. The invention can greatly save energy, reduce production discharge, reduce the in-store cooling time of the steel coils, improve the production efficiency and shorten the production period of products.
Description
Technical Field
The invention relates to the field of stainless steel rolling and heat treatment processes, in particular to a solution-free annealing production method for a stainless steel hot-rolled steel strip.
Background
The austenitic stainless steel has good processing performance and corrosion resistance, and is widely applied to the fields of tableware, medical appliances, furniture decoration, chemical industry, papermaking, energy environmental protection and the like. The hot rolled austenitic stainless steel strip is solution annealed before being delivered to downstream cold working. The main purpose of solution annealing is to completely and uniformly dissolve carbides and various alloying elements in austenite, and then to cool the austenite, suppress precipitation of carbides, improve corrosion resistance of stainless steel, soften the structure, and eliminate work hardening. The main process flow of the hot rolling procedure is as follows: heating a continuous casting slab → rough rolling high-pressure water dephosphorization → rough rolling → flying shear head and tail cutting → finish rolling high-pressure water dephosphorization → finish rolling → laminar cooling → coiling → bundling, weighing and spray printing → warehousing; the main process flow of the continuous solution annealing and pickling process is as follows: coiling → uncoiling → straightening by clamping and conveying → cutting head and tail at an inlet → welding → solid solution heating → rapid cooling → drying, scale breaking and shot blasting → acid cleaning → shearing at an outlet → coiling → weighing and bundling.
In the process of solution treatment annealing, the steel strip needs to be heated from room temperature to the solution temperature of 950-1150 ℃, so that a large amount of energy is consumed, and a large amount of CO is discharged2A gas. In order to realize the strategic goals of carbon peak reaching and carbon neutralization in China, the steel industry in China faces huge pressure on energy conservation and emission reduction, so the invention provides a solution-free annealing production method of a stainless steel hot-rolled steel strip, and the hot-rolled steel strip obtains corrosion resistance and mechanical properties similar to those of a solution-annealed product by adjusting the hot-rolling production process, thereby eliminating the links of solution heating and rapid cooling in the continuous solution-annealing pickling process and directly pickling.
Disclosure of Invention
In order to achieve the effects of energy conservation, emission reduction, cost reduction and efficiency improvement, the invention provides a solution-free annealing production method for a stainless steel hot-rolled steel strip.
The technical scheme of the invention is as follows: a solution-free annealing production method for a stainless steel hot-rolled steel strip is characterized in that a laminar cooling flow is closed based on a conventional hot-rolling process, and a heat-preservation and heat-compensation device 4, a heat-preservation cover 7 and a rapid cooling device 8 are additionally arranged; solid solution heating and rapid cooling links in the solid solution annealing and pickling process are eliminated, and pickling is directly carried out; specifically, a heat preservation and heat compensation device 4 is additionally arranged on a roller way between a roughing mill set 3 and a flying shear 5, and an intermediate billet heat compensation and heat preservation process is carried out on the intermediate billet passing through the roughing mill set 3, so that the final rolling temperature is increased; a heat preservation cover 7 is added at the original laminar cooling position to reduce the temperature drop, so that the hardened steel strip structure is softened; a rapid cooling device 8 is additionally arranged between the heat-insulating cover 7 and the underground coiling device 9, and the rapid cooling device 8 controls the cooling temperature according to the coiling capacity of the underground coiling device 9; and cooling the hot rolled steel coil after passing through the underground coiling device 9 to room temperature, and then conveying the steel coil to a solution annealing pickling line, wherein the steel coil is directly subjected to scale breaking, shot blasting and pickling without solution annealing treatment.
The rapid cooling device 8 comprises a plurality of groups of high-pressure jet flow water spray cooling devices, and the high-pressure jet flow water spray cooling devices are provided with a plurality of groups of water spray collecting pipes; each group of water spray collecting pipes is provided with four pairs, wherein a pair of inlet collecting pipes are arranged at the input side of the steel strip, and a pair of outlet collecting pipes are arranged at the output side of the steel strip; the inlet headers of each group are sprayed in the steel strip running direction, the outlet headers are sprayed against the steel strip running direction, the other two pairs of headers between the inlet headers and the outlet headers are sprayed perpendicular to the steel strip surface, and the groups are separately controlled.
The production method of the stainless steel hot-rolled steel strip free of solution annealing comprises a hot rolling process and an acid pickling process; the hot rolling process flow comprises the following steps: heating a continuous casting billet → rough rolling high-pressure water dephosphorization → rough rolling → intermediate billet heat supplementing and heat preservation → flying shear head and tail cutting → finish rolling high-pressure water dephosphorization → finish rolling → heat preservation of a heat preservation cover → rapid cooling → coiling → bundling, weighing and spray printing → warehousing; the hot rolled steel coil cooled to room temperature after the hot rolling procedure is conveyed to a solution annealing line to be directly subjected to an acid pickling procedure, wherein the acid pickling procedure comprises the following specific flows: coiling → uncoiling → straightening by clamping and conveying → cutting head and tail at the inlet → welding → crushing and shot blasting → acid cleaning → shearing at the outlet → coiling → weighing and bundling.
In the intermediate billet heat supplementing and heat preserving process in the hot rolling procedure, the finishing temperature is controlled to be 1000-1100 ℃.
The heat preservation time of the heat preservation cover 7 to the steel strip rolled by the finishing mill group 6 is controlled within 15 s.
And when the underground coiling device 9 can coil the steel strip with the temperature lower than 500 ℃, controlling the opening quantity and the water quantity of the water spraying collecting pipes of the rapid cooling device 8 and cooling the steel strip to be below 500 ℃.
When the underground coiling device 9 cannot coil the steel strip with the temperature lower than 500 ℃, the opening number or the water quantity of the water spray header pipes in the rapid cooling device 8 is reduced, the temperature is controlled to be 550-650 ℃, and the steel strip is forcibly cooled after coiling, so that the temperature of the middle layer of the steel strip is reduced to be lower than 500 ℃.
After the finish rolling, a heat preservation cover 7 is additionally arranged in a laminar cooling area, so that the rolled steel strip structure is fully softened or a natural air cooling mode is adopted, and the softening process of the work hardening structure is completed by increasing the air cooling time in the natural air cooling mode.
The rapid cooling device 8 is additionally arranged to enable the softened steel strip to rapidly pass through a precipitation sensitive temperature area, the coiling temperature is controlled below 500 ℃, and the preferred coiling temperature depends on the chemical composition of the steel strip and the rolling process.
The invention has the beneficial effects that: according to the invention, the finishing temperature is controlled to be 1000-1100 ℃ through an intermediate billet heat supplementing and heat preserving process, a work-hardened tissue is softened after a heat preserving cover arranged on a roller way of an original laminar cooling area is added, and then the steel strip is rapidly cooled to be below 500 ℃ for coiling, so that the steel strip rapidly passes through a sensitive temperature range in which Cr carbide is precipitated, and the corrosion resistance of the steel strip is ensured. Meanwhile, the solid solution heating and rapid cooling links in the solid solution annealing and pickling process of the stainless steel hot rolled strip are cancelled, and pickling is directly carried out, so that the energy can be greatly saved, and the production emission is reduced; meanwhile, due to the adoption of a low-temperature coiling process, the in-warehouse cooling time of steel coils is shortened, the production efficiency is improved, and the production period of products is shortened.
Drawings
FIG. 1 is a hot rolling process flow of a solution-annealing-free production method of a stainless steel hot-rolled steel strip;
FIG. 2 is a schematic view of the grouping and spraying angle of the rapid cooling device before coiling.
In the figure: 1, heating a furnace; 2, removing phosphorus by using high-pressure water; 3 a roughing mill group; 4, a heat preservation and heat supplement device; 5, flying shears; 6 finishing mill group; 7, a heat preservation cover; 8, a rapid cooling device; 9 underground coiler.
Detailed Description
The present invention will be described in detail by way of specific embodiments for better explanation of the invention.
Example 1:
the method comprises the following steps:
(1)304 austenitic stainless steel, the specification of the blank is 220mm multiplied by 1534mm, the plate blank is heated to 1280 ℃ in a heating furnace 1, and the plate blank is taken out after heat preservation for 4 hours; removing phosphorus from a steel billet from a heating furnace 1 by high-pressure water by 2, carrying out 5-pass rough rolling by a rough rolling unit 3, and rolling the steel billet into an intermediate billet with the thickness of 40mm multiplied by 1567mm, wherein the outlet temperature of the rough rolling is 1125 ℃;
(2) after the intermediate blank is subjected to heat supplementing and heat preservation, the finish rolling starting temperature is 1150 ℃, the intermediate blank is subjected to 7-pass finish rolling by a finish rolling unit 6 to be rolled into a steel strip with the thickness of 4.8 multiplied by 1565mm, the finish rolling temperature is 1040 ℃, and the rolling speed is 6.5 m/s;
(3) the steel strip rolled in the step 2 directly passes through a laminar cooling area, a laminar cooling nozzle keeps a closed state, a heat preservation cover 7 is covered, the time of the steel strip running from an outlet of the finishing mill unit 6 to an outlet of the laminar cooling area is 10s, and the softening rate of a work hardening structure can reach more than 80%;
(4) the softened steel strip enters a rapid cooling device 8 to be cooled to 450 ℃, then enters an underground coiling device 9 to be coiled into a steel coil, and the steel coil is bundled, weighed and jet-printed and then conveyed to a steel coil warehouse to be cooled to room temperature;
(5) and conveying the steel coil cooled to room temperature to a pickling line, uncoiling, straightening, cutting head and tail, welding, performing surface scale breaking and shot blasting treatment, then entering a pickling tank for pickling, coiling the steel coil after pickling, bundling and weighing, and performing shearing decomposition at the outlet of the pickling tank according to the weight of the steel coil.
Example 2:
the method comprises the following steps:
(1)304 austenitic stainless steel, the specification of the blank is 220mm multiplied by 1534mm, the plate blank is heated to 1280 ℃ in a heating furnace 1, and the plate blank is taken out after heat preservation for 4 hours; removing phosphorus from a steel billet from a heating furnace 1 by high-pressure water by 2, carrying out 5-pass rough rolling by a rough rolling unit 3, and rolling the steel billet into an intermediate billet with the thickness of 40mm multiplied by 1567mm, wherein the outlet temperature of the rough rolling is 1125 ℃;
(2) after the intermediate blank is subjected to heat supplementing and heat preservation, the finish rolling starting temperature is 1150 ℃, the intermediate blank is subjected to 7-pass finish rolling by a finish rolling unit 6 to be rolled into a steel strip with the thickness of 4.8 multiplied by 1565mm, the finish rolling temperature is 1040 ℃, and the rolling speed is 6.5 m/s;
(3) the steel strip rolled in the step 2 directly passes through a laminar cooling area, a laminar cooling nozzle keeps a closed state, a heat preservation cover 7 is covered, the time of the steel strip running from an outlet of the finishing mill unit 6 to an outlet of the laminar cooling area is 10s, and the softening rate of a work hardening structure can reach more than 80%;
(4) the underground coiling device 9 can not coil the steel strip with the temperature lower than 500 ℃, the softened steel strip enters the rapid cooling device 8 to be cooled to 550 ℃, then enters the underground coiling device 9 to be coiled into a steel strip, and after the steel strip is bundled, weighed and jet-printed, the steel strip is hoisted into a quenching tank to be forcibly cooled for 2 hours and then is conveyed to a steel strip warehouse to be cooled to room temperature;
(5) and conveying the steel coil cooled to room temperature to a pickling line, uncoiling, straightening, cutting head and tail, welding, performing surface scale breaking and shot blasting treatment, then entering a pickling tank for pickling, coiling the steel coil after pickling, bundling and weighing, and performing shearing decomposition at the outlet of the pickling tank according to the weight of the steel coil.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art can change or modify the technical content disclosed above into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (7)
1. A solution-free annealing production method for a stainless steel hot-rolled steel strip is characterized in that the solution-free annealing production method for the stainless steel hot-rolled steel strip is based on a conventional hot-rolling procedure, a laminar cooling flow is closed, and a heat-preserving and heat-supplementing device (4), a heat-preserving cover (7) and a rapid cooling device (8) are additionally arranged; solid solution heating and rapid cooling links in the solid solution annealing and pickling process are eliminated, and pickling is directly carried out; specifically, a heat preservation and heat supplement device (4) is additionally arranged on a roller way between a rough rolling unit (3) and a flying shear (5), and an intermediate billet heat supplement and heat preservation process is carried out on the intermediate billet passing through the rough rolling unit (3), so that the final rolling temperature is increased; a heat preservation cover (7) is added at the original laminar flow cooling process to reduce the temperature drop; a rapid cooling device (8) is additionally arranged between the heat-insulating cover (7) and the underground coiling device (9), and the rapid cooling device (8) controls the cooling temperature according to the coiling capacity of the underground coiling device (9); and (3) cooling the hot rolled steel coil after passing through the underground coiling device (9) to room temperature, conveying the steel coil to a solution annealing pickling line, and directly carrying out scale breaking, shot blasting and pickling without carrying out solution annealing treatment.
2. The solution-free annealing production method of hot-rolled stainless steel strips according to claim 1, characterized in that the rapid cooling device (8) comprises a plurality of groups of high-pressure jet water spray cooling devices provided with a plurality of groups of water spray headers; each group of water spray collecting pipes is provided with four pairs, wherein a pair of inlet collecting pipes are arranged at the input side of the steel strip, and a pair of outlet collecting pipes are arranged at the output side of the steel strip; the inlet collecting pipes of each group are sprayed along the running direction of the steel strip, the outlet collecting pipes are sprayed against the running direction of the steel strip, and the other two pairs of collecting pipes between the inlet collecting pipes and the outlet collecting pipes are sprayed in a way of being vertical to the surface of the steel strip; the groups are controlled separately.
3. The solution-free annealing production method of the hot-rolled stainless steel strip as claimed in claim 1, wherein the intermediate billet heat-supplementing and heat-preserving process controls the finishing temperature to be 1000-1100 ℃.
4. The solution-free annealing production method of hot rolled stainless steel strip according to claim 1, wherein the holding time of the holding cover (7) for the hot rolled stainless steel strip after being rolled by the finishing mill train (6) is controlled to be within 15 s.
5. The solution-free annealing production method of hot-rolled stainless steel strip according to claim 1, wherein the underground coiling device (9) is capable of controlling the opening amount and water amount of the water spray headers of the rapid cooling device (8) to cool the steel strip to below 500 ℃ when the steel strip with the temperature below 500 ℃ is coiled.
6. The solution-free annealing production method of the hot-rolled stainless steel strip as claimed in claim 5, wherein when the underground coiling device (9) cannot coil the steel strip with the temperature lower than 500 ℃, the opening number or water amount of the water spray header in the rapid cooling device (8) is adjusted to control the temperature to be 550-650 ℃, and the steel strip is forcibly cooled after coiling so that the temperature of the middle layer of the steel strip is reduced to be lower than 500 ℃.
7. The solution-free annealing production method of the hot-rolled stainless steel strip as claimed in claim 1 or 3, wherein the intermediate billet heat supplementing and heat preserving process is heating and heat preserving using natural gas or coal gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210081570.2A CN114558888A (en) | 2022-01-24 | 2022-01-24 | Solution-free annealing production method for stainless steel hot-rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210081570.2A CN114558888A (en) | 2022-01-24 | 2022-01-24 | Solution-free annealing production method for stainless steel hot-rolled steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114558888A true CN114558888A (en) | 2022-05-31 |
Family
ID=81713568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210081570.2A Pending CN114558888A (en) | 2022-01-24 | 2022-01-24 | Solution-free annealing production method for stainless steel hot-rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114558888A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029531A (en) * | 2022-06-14 | 2022-09-09 | 山西太钢不锈钢股份有限公司 | Online solution treatment method for stainless steel medium plate |
| CN115415320A (en) * | 2022-08-31 | 2022-12-02 | 大冶特殊钢有限公司 | Rolling method of 20Cr steel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625447A (en) * | 2002-01-31 | 2005-06-08 | Sms迪马格股份公司 | Method and installation for producing a hot rolled strip from austenitic rust-resistant steels |
| CN101585046A (en) * | 2008-05-23 | 2009-11-25 | 宝山钢铁股份有限公司 | SUS304 stainless steel cold-rolled plate producing method omitting annealing before cold rolling |
| CN101748256A (en) * | 2010-01-15 | 2010-06-23 | 山西太钢不锈钢股份有限公司 | Rolling and solution treatment method for 304 stainless strip steel |
| CN106583447A (en) * | 2015-10-19 | 2017-04-26 | 中冶东方工程技术有限公司秦皇岛研究设计院 | Method for rolling austenitic stainless steel belt by using steckel mill |
| CN110523787A (en) * | 2019-09-30 | 2019-12-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of hot continuous rolling steel centre base ultra-rapid cooling method |
| CN111676355A (en) * | 2020-07-23 | 2020-09-18 | 东北大学 | Online solution treatment process for austenitic stainless steel plate |
| CN112267011A (en) * | 2020-10-23 | 2021-01-26 | 东北大学 | Multifunctional stainless steel plate solid solution heat treatment process and device |
-
2022
- 2022-01-24 CN CN202210081570.2A patent/CN114558888A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625447A (en) * | 2002-01-31 | 2005-06-08 | Sms迪马格股份公司 | Method and installation for producing a hot rolled strip from austenitic rust-resistant steels |
| CN101585046A (en) * | 2008-05-23 | 2009-11-25 | 宝山钢铁股份有限公司 | SUS304 stainless steel cold-rolled plate producing method omitting annealing before cold rolling |
| CN101748256A (en) * | 2010-01-15 | 2010-06-23 | 山西太钢不锈钢股份有限公司 | Rolling and solution treatment method for 304 stainless strip steel |
| CN106583447A (en) * | 2015-10-19 | 2017-04-26 | 中冶东方工程技术有限公司秦皇岛研究设计院 | Method for rolling austenitic stainless steel belt by using steckel mill |
| CN110523787A (en) * | 2019-09-30 | 2019-12-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of hot continuous rolling steel centre base ultra-rapid cooling method |
| CN111676355A (en) * | 2020-07-23 | 2020-09-18 | 东北大学 | Online solution treatment process for austenitic stainless steel plate |
| CN112267011A (en) * | 2020-10-23 | 2021-01-26 | 东北大学 | Multifunctional stainless steel plate solid solution heat treatment process and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029531A (en) * | 2022-06-14 | 2022-09-09 | 山西太钢不锈钢股份有限公司 | Online solution treatment method for stainless steel medium plate |
| CN115415320A (en) * | 2022-08-31 | 2022-12-02 | 大冶特殊钢有限公司 | Rolling method of 20Cr steel |
| CN115415320B (en) * | 2022-08-31 | 2024-06-11 | 大冶特殊钢有限公司 | Rolling method of 20Cr steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100580102C (en) | Process for producing high strength hardened and tempered steel by steekle mill on-line quenching | |
| CN104525560B (en) | Effective control method of the 30mm cut deal pitted skins of straight carbon steel/Nb bearing steel 20 | |
| CN103710507B (en) | A kind of preparation method of low nickel duplex stainless steel hot-rolled sheet coil | |
| CN114558888A (en) | Solution-free annealing production method for stainless steel hot-rolled steel strip | |
| CN111676355B (en) | Online solution treatment process for austenitic stainless steel plate | |
| CN103962386B (en) | The corrosion proof iron scale control method of a kind of raising hot rolled steel plate | |
| CN102310314A (en) | Processing method of titanium and titanium alloy strip coils | |
| CN112267011B (en) | Multifunctional stainless steel plate solid solution heat treatment process and device | |
| CN110756580B (en) | Rolling method of wide and thin 6Mo super austenitic stainless steel plate | |
| CN113403462B (en) | Preparation method of green-peel steel with yield strength of 700-1000 MPa | |
| CN102059248A (en) | Method for producing titanium coil by using normal hot continuous rolling mill | |
| CN103341498A (en) | Method for reducing thickness of oxide scale on surface of hot-rolled steel sheet | |
| CN103215422A (en) | Method for plastically producing thin stainless steel cold-rolled plates by utilizing hot-rolled steel bands | |
| CN102345051A (en) | Steel for bridge and production method thereof | |
| CN105032974B (en) | The production method of zirconium and zircaloy band volume | |
| CN111790754A (en) | Thin X65 steel grade pipeline steel for single-stand steckel mill and rolling method | |
| CN105170665A (en) | Method for removing iron oxide scale from surface of strip steel efficiently | |
| CN113355496B (en) | On-line solution annealing process for rolling waste heat of stainless steel hot-rolled coil | |
| CN109777946A (en) | A kind of production system of strip continuous heat | |
| CN117339999A (en) | Hot rolling-on-line solid solution-on-line pickling integrated process and production line of medium plate stainless steel | |
| CN112872064A (en) | Control process for iron scale of low-carbon hot-rolled narrow strip steel for pickling | |
| CN101748256A (en) | Rolling and solution treatment method for 304 stainless strip steel | |
| CN102534364B (en) | Production method capable of improving magnetic property of common grain-oriented silicon steel | |
| CN104998917B (en) | A kind of method for eliminating hot rolled sheet metal surface piebald defect | |
| CN111790753A (en) | Wide and thin X60 steel grade pipeline steel of single-stand steckel mill and rolling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |