CN108787751B - Production control method for wide-width thin-specification super stainless steel plate coil of single-stand steckel mill - Google Patents
Production control method for wide-width thin-specification super stainless steel plate coil of single-stand steckel mill Download PDFInfo
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- CN108787751B CN108787751B CN201810487364.5A CN201810487364A CN108787751B CN 108787751 B CN108787751 B CN 108787751B CN 201810487364 A CN201810487364 A CN 201810487364A CN 108787751 B CN108787751 B CN 108787751B
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- 239000010935 stainless steel Substances 0.000 title claims abstract description 44
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 44
- 238000000195 production control method Methods 0.000 title claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 14
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000002788 crimping Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000013072 incoming material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a production control method of a wide and thin super stainless steel plate/coil of a single-stand steckel mill, which is used for carrying out refined management and control on the obvious difference between the production of the wide and thin super stainless steel plate/coil and the conventional steel in the working procedures of heating, rolling, curling, shearing, straightening and the like in the production process, and improving the comprehensive qualification rate of the wide and thin super stainless steel plate/coil.
Description
Technical Field
The invention relates to a production control process of a special alloy plate (coil).
Background
The special alloy plate (coil) such as industrial pure titanium, stainless steel, nickel-based alloy and the like is usually used in special environments such as biomedical treatment, nuclear power engineering, chemical containers, seawater desalination and the like, and has great production significance and high added value of products. With the development of special alloy plate (coil) industry, the international and domestic market demands for wide and thin specifications are gradually increased, but there are companies which can produce products with width more than 2000mm at home and abroad. The thickness and width of the special alloy plate (coil) produced by the current hot rolling single piece cannot meet the market requirement.
Disclosure of Invention
The invention provides a stable production control method of a wide and thin super stainless steel plate/coil of a single-stand steckel mill, which is used for carrying out refined management and control mainly aiming at the obvious difference between the production of the wide and thin super stainless steel plate (coil) and the working procedures of heating, rolling, curling, shearing, straightening and the like in the production process of conventional steel grades, and improves the comprehensive qualification rate of the wide and thin super stainless steel plate/coil.
The invention specifically adopts the following technical scheme:
a production control method for a wide-width thin-specification super stainless steel plate/coil of a single-stand steckel mill is characterized by comprising the following steps:
controlling a heating process:
because the special alloy plate/coil has obvious difference with the characteristics of the steel materials, the special alloy plate/coil has great difference with the steel materials in the aspect of heating temperature, the heating temperature for normally producing the steel materials is basically about 1100-.
(1) Determining the heating temperature of 1250 +/-10 ℃ and the furnace time of 1.5-2.5min/mm according to the high-temperature processing and the surface characteristics of the super stainless steel, and reducing the rolling load of a rolling mill while ensuring the surface quality; before the super stainless steel blank is filled with steel, the heating time in the furnace is ensured, and meanwhile, the uniformity of the soaking section time and the steel temperature of the heating furnace is ensured by taking the target heating temperature as the requirement, so that the heating quality is ensured;
(II) controlling a high-pressure water descaling process:
the billet steel can form thick and loose primary iron scale after being heated by a heating furnace, and the thick and loose primary iron scale needs to be removed by high-pressure water descaling, so that the defects of pit formation and the like during the rolling process are avoided. Aiming at super stainless steel, because the material characteristics form thin and compact primary scale after passing through a heating furnace, the descaling pass is properly reduced according to the material characteristics.
According to the surface characteristics of the super stainless steel and the requirements on the rolling temperature, the descaling pass is reduced, and the conditions are created for the stability of the rolling process while the surface quality is ensured;
and (III) rolling process control:
due to the obvious difference between the high-temperature stress-strain curve of the super stainless steel plate/coil material and the steel material, the rolling procedure of the steel material is not generally applicable any more, the rolling pass and the reduction rate need to be correspondingly adjusted according to the material characteristics, and the rolling success rate and the plate shape qualified rate are ensured.
(1) Pre-arranging a rolling schedule in advance according to a super stainless steel hot working stress-strain curve and continuously optimizing the rolling pass reduction rate;
(2) selecting the coiling tension of 25t and the coiling temperature of 900 ℃ according to the characteristics of the super stainless steel;
(3) the cooling water of the roller body is manually closed to 80 percent, so that the rolling temperature drop is reduced, and the cooling water of the front roller way and the rear roller way of the rolling mill is closed;
(IV) controlling a curling and straightening process:
because the coiled material of the super stainless steel plate has the characteristics of quality and the strength which are far higher than those of steel materials, the curling and straightening parameters need to be correspondingly adjusted.
(1) After rolling, the super stainless steel plate/coil is not watered, and side spraying is not started, so that the temperature drop is reduced, and conditions are created for improving the curling or straightening effect;
(2) aiming at super stainless steel, high crimping power and steel throwing speed are adopted, and the clamping force of a front side guide plate of the crimping machine is slightly used for clamping;
(3) and the super stainless steel hot straightening machine is normally used, so that the alloy plate is straight after being straightened, and the height of the edge roller and the return straightening of head and tail plates of a rolled piece are adjusted by paying attention to the point.
The invention has the beneficial effects that:
the method realizes the stable production of the wide and thin super stainless steel plate/coil, not only can further reduce the production cost of medium and thick plate coil factories and improve the production efficiency, lays a foundation for the batch production of the wide and thin super stainless steel plate/coil, and effectively fills the gap of the wide and thin super stainless steel plate/coil production technology at home and abroad. Meanwhile, production and sale channels of enterprises are widened, product diversity is enriched, and the core competitiveness of the enterprises in the special alloy plate market is improved.
Detailed Description
The following describes the specific embodiment of the present invention in detail by taking the stable production and development of the wide and thin super stainless steel S32053 alloy roll 17B0608001/2 as an example.
Example one
1. And (3) production planning:
the method is suitable for different material type designs of different blank sources, optimizes and formulates a heating furnace steel loading plan according to the super stainless steel type characteristics, determines a transition plate with similar width and matched thickness to confirm the plate shape and the surface in advance, and strictly limits the super stainless steel production according to the production sequence from easy to difficult and from narrow to wide. For the blanks with non-standard sizes, the accurate distribution position and the stable loading and tapping are ensured by adopting a manual positioning loading and tapping mode.
2# heating furnace single furnace: high temperature heating roller period → 2 rows of roll rolling transition thickness 8-10mm (width within 2200mm, high strength 960, etc. priority) → wide and thin S32053 alloy roll
2. The blank use requirements are as follows:
and (3) incoming material confirmation and targeted adjustment, wherein aiming at the problem that the source shape and size of the super stainless steel blank are irregular, length-width-thickness confirmation is carried out on the size of each incoming material, the width and thickness of the secondary blank or the opening degree of a side guide plate are correspondingly recorded according to the actual width and thickness of the blank, and the adverse effect on the roll shape of the rolled plate caused by the cogging shape is reduced.
2.1 the shape of the cogging stock confirms that two blocks have obvious middle bulging problems, wherein the head-middle-tail width of 17B0608001 is 1610mm-1710mm-1620mm, and the head-middle-tail width of 17B0608002 is 1600mm-1670mm-1600mm, the width of the secondary stock or the opening degree of the side guide plate needs to be adjusted pertinently, and the adverse effect on the rolled plate/coil shape caused by the cogging shape is reduced. The secondary billet width 17B0608001 is set to 1710mm, and the secondary billet width 17B0608002 is set to 1670 mm.
2.2 when the clamp clamps the blank, the damage of the clamp to the surface of the blank is reduced.
3. The heating process is controlled according to the requirements of heating temperature and in-furnace time, the thickness of the 17B0608001/2 blank is 85mm according to the in-furnace time of 130-.
4. Descaling with high-pressure water
1, descaling box; the rolling passes do not remove scale.
5. Rolling process
5.1 conventional rolling 17B0608001/2 increasing the rolling pass reduces the finish rolling reduction.
The secondary protocol is as follows:
5.2 the working roll is a roll with the roll diameter of 930-.
5.3 Take-up high tension 25t 17B0608001/2 for use.
5.4 the cooling water of the roller body is manually closed to 80 percent, the rolling temperature drop is reduced, and the cooling water of the front roller way and the rear roller way of the rolling mill is closed.
5.5 the barrel temperature 900 ℃.
5.6 the function of cutting the head of the flying shear is not used.
5.7 after rolling, the rolling method does not need watering and side spraying, reduces temperature drop and creates conditions for improving the curling or straightening effect.
5.8 high-power curling, the speed of the cast steel curling is 1.8m/s, and the 7# side guide plate is slightly clamped.
6. Alloy coil shape, size and tolerance
The thickness tolerance is internally controlled according to-0.5- +0.5mm, the thickness value is estimated according to the actual length value according to the volume invariance principle, and the thickness deviation setting is timely adjusted by the thickness rolling mill according to the estimated thickness value.
7. Alloy roll identification and packaging
Because S32053 stress is very big, the alloy coil is packed in advance before lifting by adopting a special fastening mode, and the coil loosening is prevented.
8. Production anomaly handling
8.1 when the production is abnormal, the rolled piece is preferentially discharged out of the rolling mill for curling, and when the rolled piece cannot be discharged out of the rolling mill, the rolling mill can be descaled and cooled, and the flying shear is forbidden to cut the abnormal rolled piece.
8.2 preparing 2 flame cutters and 2 handheld plasma cutting machines on site, and cutting after the temperature of the rolled piece is reduced to be close to the temperature of the rolled piece.
8.3 the nickel base and the stainless steel coil are non-magnetic, and the coil needs to be lifted and transported by adopting a steel wire rope or a vacuum chuck and the like.
Claims (5)
1. A production control method for a wide-width thin-specification super stainless steel plate/coil of a single-stand steckel mill is characterized by comprising the following steps:
controlling a heating process:
(1) determining the heating temperature of 1250 +/-10 ℃ and the furnace time of 1.5-2.5min/mm according to the high-temperature processing and the surface characteristics of the super stainless steel, and reducing the rolling load of a rolling mill while ensuring the surface quality; before the super stainless steel blank is filled with steel, the heating time in the furnace is ensured, and meanwhile, the uniformity of the soaking section time and the steel temperature of the heating furnace is ensured by taking the target heating temperature as the requirement, so that the heating quality is ensured;
(II) controlling a high-pressure water descaling process:
according to the surface characteristics of the super stainless steel and the requirements on the rolling temperature, the descaling pass is reduced, and the conditions are created for the stability of the rolling process while the surface quality is ensured;
and (III) rolling process control:
(1) pre-arranging a rolling schedule in advance according to a super stainless steel hot working stress-strain curve and continuously optimizing the rolling pass reduction rate;
(2) selecting the coiling tension of 25t and the coiling temperature of 900 ℃ according to the characteristics of the super stainless steel;
(3) the cooling water of the roller body is manually closed to 80 percent, so that the rolling temperature drop is reduced, and the cooling water of the front roller way and the rear roller way of the rolling mill is closed;
(IV) controlling a curling and straightening process:
(1) after rolling, the super stainless steel plate/coil is not watered, and side spraying is not started to reduce temperature drop;
(2) aiming at super stainless steel, high crimping power and steel throwing speed are adopted, and the clamping force of a front side guide plate of the crimping machine is slightly used for clamping;
(3) and the super stainless steel hot straightening machine is normally put into use, so that the super stainless steel is straight after being straightened, and the adjustment of the height of the side roller and the return straightening of the head and tail plates of the rolled piece are focused on.
2. The method for controlling the production of the super stainless steel plate/coil with the wide and thin specifications of the single-stand steckel mill as claimed in claim 1, wherein before the heating process, the material shape design is performed in accordance with different blank sources, and the plate shape and the surface are confirmed in advance by determining the transition plate with similar width and matched thickness.
3. The method for controlling the production of the super stainless steel plate/coil with wide width and thin specification by the single-stand steckel mill as claimed in claim 1, wherein the super stainless steel is produced in the production sequence from easy to difficult and from narrow to wide.
4. The method for controlling the production of the super stainless steel plate/coil with the wide and thin specifications for the single-stand steckel mill as claimed in claim 1, wherein the descaling pass is performed by one step of rough descaling and is performed by no step of fine descaling.
5. The method for controlling the production of the super stainless steel plate/coil with the wide and thin specifications of the single-stand steckel mill as claimed in claim 1, wherein the non-standard size blank adopts a manual positioning and steel loading mode to ensure accurate material distribution position and stable steel loading and tapping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810487364.5A CN108787751B (en) | 2018-05-21 | 2018-05-21 | Production control method for wide-width thin-specification super stainless steel plate coil of single-stand steckel mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810487364.5A CN108787751B (en) | 2018-05-21 | 2018-05-21 | Production control method for wide-width thin-specification super stainless steel plate coil of single-stand steckel mill |
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| CN108787751A CN108787751A (en) | 2018-11-13 |
| CN108787751B true CN108787751B (en) | 2020-02-07 |
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| CN110773565B (en) * | 2019-09-23 | 2021-08-10 | 南京钢铁股份有限公司 | Method for rolling super austenitic stainless steel |
| CN110756580B (en) * | 2019-10-15 | 2021-03-30 | 南京钢铁股份有限公司 | Rolling method of wide and thin 6Mo super austenitic stainless steel plate |
| CN111389930B (en) * | 2020-03-30 | 2022-06-17 | 南京钢铁股份有限公司 | Production process for rolling 4 mm-thick wear-resistant steel by using single-stand steckel mill |
| CN111889512B (en) * | 2020-08-12 | 2021-12-17 | 宝武集团鄂城钢铁有限公司 | Method for producing thin steel plate by single-stand rolling mill |
| CN113102500B (en) * | 2021-04-27 | 2022-04-19 | 南京钢铁股份有限公司 | Rolling method of impact Q345R at-40 DEG C |
| CN115254963B (en) * | 2022-04-11 | 2024-06-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving standard-reaching rate of SUS410L stainless steel plate shape |
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| JP5764936B2 (en) * | 2011-01-24 | 2015-08-19 | Ｊｆｅスチール株式会社 | Thick steel plate descaling equipment and descaling method |
| EP2948257B1 (en) * | 2013-01-24 | 2022-06-29 | Mestek Machinery, Inc. | Apparatus for metal positioning and forming |
| CN106244922B (en) * | 2016-08-31 | 2018-12-11 | 南京钢铁股份有限公司 | A kind of big thickness Q960E super-high strength steel production method |
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