CN103769424B - The control method of steekle mill surface of steel plate red scale - Google Patents
The control method of steekle mill surface of steel plate red scale Download PDFInfo
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Abstract
The present invention relates to a kind of control method of steekle mill surface of steel plate red scale, carry out according to the following steps: strand enters heating furnace and heats, high-pressure water descaling is adopted to strand after coming out of the stove, carry out roughing to the strand after de-scaling and obtain steel billet, rough rolling step carries out at least three de-scalings to strand; Carry out finish rolling to steel billet after roughing, the finish rolling stage carries out at least three de-scalings to strand.The present invention improves the quality of surface of steel plate iron scale by controlling de-scaling system in billet rolling technique and the operation of rolling, prevent surface of steel plate from producing comminution iron scale that is red, loose, porous, generate cyan, fine and close iron scale, not only improve the quality of surface of steel plate, also improve the corrosion resistance of surface of steel plate.
Description
Technical field
The invention belongs to steel plate rolling technical field, be specifically related to a kind of control method of steekle mill surface of steel plate red scale.
Background technology
In recent years, along with the fast development of steel and iron industry, cut deal production capacity is discharged fast, and due to production capacity surplus, the requirement of client to steel plate is more and more higher, except requiring strictly properties of product, also proposes high requirement to the surface quality of steel plate.For a long time, domestic iron and steel enterprises lacks plate surface quality to be paid close attention to, and causes cut deal surface and there are iron scale red rust, band shape and the quality problems such as " pit ", " pitted skin ", annoying manufacturer always, there is no thorough solution at present.Therefore, prevent cut deal surface produce iron scale be iron and steel enterprise at present the most in one of the problem wanted.The red scale (red rust) of surface of steel plate is that the recurrent a kind of defect of steel plate produced by steekle mill, and this iron scale is mainly by FeO and/or Fe in Plate Production process
3o
4the Fe that broken, oxidation transformation becomes
2o
3caused by, there is loose, porous, the shortcoming such as oxidizable, and the surface of steel plate easy-to-rust after oxidation, the steel plate making surface produce red rust gets rusty easily in storage and In transit, have impact on the presentation quality of steel plate, and then have a strong impact on the market image of product, sell to iron and steel enterprise and bring very large puzzlement.According to the applicant understood, the research of current iron scale focuses mostly in band steel and common Heavy Plate Production, the research of steekle mill aspect is little, the formation adopting physical method controlled oxidization iron sheet in steekle mill production process more, such as high-pressure water descaling method, rolling de-scaling method and mechanical descaling method etc., the research for red scale Crack cause then focuses mostly in the research of rolling temperature, chemical composition.But its scale on surface quality control of steel plate that steekle mill is produced has its particularity, the charge length that steekle mill adopts is longer, when rolling thickness is thinner, because operation of rolling passage is longer for interval time, make rolling temperature of steel plate be difficult to control and the iron scale thickness of Surface Creation is often thicker, the easy fragmentation of scale on surface is oxidized to Fe
2o
3, thus produce red rust.
Summary of the invention
The technical problem to be solved in the present invention is the defect existed according to prior art, a kind of control method of steekle mill surface of steel plate red scale is proposed, under existing process equipment condition, the red rust of steekle mill surface of steel plate generation can be eliminated by improvement rolling and descaling process.
The control method of steekle mill surface of steel plate red scale of the present invention, carry out according to the following steps:
(1) strand composition is C0.06 ~ 0.25% by mass percentage, Si0.13 ~ 0.35%, Mn0.90 ~ 1.60%, P≤0.03%, S≤0.03%, Nb0 ~ 0.04%, Ni0 ~ 1%, Mo0 ~ 0.5%, Ti0 ~ 0.018%, Alt0.02 ~ 0.05%, and all the other are Fe and impurity;
(2) strand enters heating furnace and heats, and tapping temperature controls at 1150 ~ 1250 DEG C, and time inside furnace is 110 ~ 170min;
(3) adopt high-pressure water descaling to strand after coming out of the stove, de-scaling temperature is 1140 ~ 1230 DEG C, and de-scaling pressure is at least 18MPa;
(4) carry out roughing to the strand after de-scaling and obtain steel billet, during roughing, start rolling temperature is 1120 ~ 1210 DEG C, and finishing temperature is 1030 ~ 1120 DEG C, and accumulative drafts is 40 ~ 80%, and rough rolling step carries out at least three de-scalings to strand;
(5) carry out finish rolling to steel billet after roughing, start rolling temperature is 980 ~ 1070 DEG C, and finishing temperature is 880 ± 20 DEG C, and accumulative drafts is 45 ~ 85%, and mill speed is 1.5 ~ 3.5m/s, and the finish rolling stage carries out at least three de-scalings to strand.
The present invention designs steekle mill production line, the charge length of this steekle mill use is longer in general, compared with cut deal and hot continuous rolling etc., the red scale that corrosion resistance is poor is easily there is in steel plate rolling process, employing the present invention can under existing technological equipment condition, the red rust of steekle mill surface of steel plate generation is eliminated by improvement rolling and descaling process, and technology of the present invention can be applicable to steel grade more widely, be not limited to the steel grade such as the deck of boat and low-alloy high-strength steel.
Wherein, described step (4) and (5) in, for the steel plate of thickness G reatT.GreaT.GT 20mm, need carry out 4 or 6 passage roughing, 5 or 7 passage finish rolling, during finish rolling, pass deformation rate is 15 ~ 20%, finishing temperature is 885 ± 15 DEG C, thick, finish rolling stage each de-scaling three passage; For the steel plate of thickness≤20mm, need carry out 4 or 6 passage roughing, 7 or 9 passage finish rolling, during finish rolling, pass deformation rate is 13 ~ 25%, and finishing temperature is 875 ± 15 DEG C, thick, finish rolling stage each de-scaling three ~ four-pass.
Preferably, when steel plate thickness is 20mm, described step (4) in four-pass roughing is carried out to strand, wherein carries out de-scaling to strand before previous three passes roughing, de-scaling hydraulic pressure is at least 20MPa; Described step (5) in five passage finish rolling are carried out to strand, wherein need to carry out de-scaling to strand before the first passage finish rolling and last two passage finish rolling, de-scaling hydraulic pressure is at least 20MPa.
Preferably, for the steel plate not needing warm-rolling system of robbing, thickness >=14mm, the finish rolling stage adopts last three passages or last two passage de-scalings.
Find after deliberation, the formation of surface of steel plate red scale, closely related with scale removal effect in the finishing temperature of steel plate and the operation of rolling: after finish to gauge, surface of steel plate iron scale is more thick easier to be broken, and then more easily form red scale, and the finishing temperature of steel plate is lower, more easily form red scale, therefore need under the prerequisite ensureing plate property, the finishing temperature of suitable raising steel plate, improve the plasticity of surface of steel plate iron scale as much as possible, learn through test of many times, the finishing temperature control of steel plate is at 880 ± 20 DEG C, surface of steel plate can be made not easily to generate red scale, but generation cyan, fine and close iron scale, not only can ensure the performance of steel plate, further improve plate surface quality, improve the competitiveness of product in market, and in steel plate rolling process descaling process terminate more early, more easily form red scale, therefore need to be optimized the de-scaling system of the operation of rolling, de-scaling is carried out before ensureing each passage in three roads, finish to gauge end as far as possible, farthest be thinned the thickness of iron oxide on surface of billet steel skin in the operation of rolling, improve thickness and the plasticity of surface of steel plate iron scale, and then prevent surface of steel plate iron scale fragmentation oxidation, produce red rust.
Further preferred, described strand red temperature in thick, finishing stands controls at 650 ± 30 DEG C.
Preferred further again, employing cooling in heap mode slow cooling 48 hours before (2) middle strand enters heating furnace heating in described step.
Further preferred, described slab thickness is 150 ~ 220mm, and described steel sheet product thickness specification is 8 ~ 60mm.
The present invention improves the quality of surface of steel plate iron scale by controlling de-scaling system in billet rolling technique and the operation of rolling, prevent surface of steel plate from producing comminution iron scale that is red, loose, porous, generate cyan, fine and close iron scale, not only improve the quality of surface of steel plate, also improve the corrosion resistance of surface of steel plate.
Detailed description of the invention
Embodiment one
The technological process of steel plate rolling is: molten iron pretreatment → converter smelting → RH+LF (or LF+RH) refining → continuous casting → steel billet inspection → cooling in heap → steel billet examination → strand heating → thick de-scaling → roughing → smart de-scaling → finish rolling → section cooling → aligning → air cooling → cutting to length (→ flaw detection) → sampling (→ ball blast → normalizing heat treatment → aligning → sampling) → spray printed mark → inspection → warehouse-in.
First, smelting molten steel and continuous casting become steel billet, and the thickness of steel billet is at 150mm, and steel billet Composition Control exists:
| Composition | C | Si | Mn | P | S | Nb | Ni | Mo | Ti | Alt | Fe and impurity |
| Content (wt, %) | 0.16 | 0.21 | 1.44 | 0.014 | 0.003 | 0.014 | 0 | 0 | 0 | 0.035 | 98.124 |
Secondly, cooling in heap is carried out to the steel billet cast, to reduce the hydrogen content in steel billet, the internal stress produced when simultaneously as far as possible reducing cooling, steel billet, after 48 hours, is put into heating furnace and is heated by steel billet slow cooling, and tapping temperature controls at 1150 DEG C, time inside furnace is 110 ~ 170min, and soaking time is not less than 20min.Steel billet after coming out of the stove adopts high-pressure water descaling in thick de-scaling place, and de-scaling temperature is about 1140 DEG C, and de-scaling pressure is at least 18MPa.Strand after de-scaling carries out four-pass roughing, and start rolling temperature is about 1120 DEG C, and finishing temperature is 1030 DEG C, and accumulative drafts is about 60%, and during roughing, previous three passes need carry out de-scaling before machine to strand, and de-scaling hydraulic pressure is 22MPa; After roughing, five passage finish rolling are carried out to steel billet, start rolling temperature is 1000 ± 15 DEG C, finishing temperature is 880 ± 20 DEG C, red temperature controls at 650 ± 30 DEG C, and accumulative drafts is about 67%, and mill speed is 1.5 ~ 3.5m/s, need before finish rolling stage first passage and last two passage finish rolling to carry out de-scaling before machine to strand, de-scaling hydraulic pressure is 20MPa, finally obtains the steel plate Q345C that thickness is 20mm, and the thickness of its surperficial cyan iron scale is 15 μm.
Embodiment two
Smelting molten steel and continuous casting become steel billet, and the thickness of steel billet is at 220mm, and steel billet Composition Control exists:
| Composition | C | Si | Mn | P | S | Nb | Ni | Mo | Ti | Alt | Fe and impurity |
| Content (wt, %) | 0.25 | 0.35 | 1.6 | 0.03 | 0.02 | 0.04 | 1 | 0.5 | 0.018 | 0.05 | 96.142 |
Carry out cooling in heap after 48 hours to steel billet, steel billet is put into heating furnace and heats, tapping temperature controls at 1250 DEG C, and time inside furnace is 150 ~ 170min, and soaking time is 35min.Steel billet after coming out of the stove adopts high-pressure water descaling in thick de-scaling place, and de-scaling temperature is about 1230 DEG C, and de-scaling pressure is 22MPa.Strand after de-scaling carries out four-pass roughing, and start rolling temperature is about 1200 DEG C, and finishing temperature is 1120 DEG C, accumulative drafts about 40%, and during roughing, previous three passes need carry out de-scaling before machine to strand, and de-scaling hydraulic pressure is 20MPa; After roughing, five passage finish rolling are carried out to steel billet, start rolling temperature is 1050 ± 15 DEG C, finishing temperature is about 900 DEG C, red temperature controls at about 680 DEG C, drafts is about 60%, and mill speed is 1.5 ~ 3.5m/s, and de-scaling hydraulic pressure is 20MPa, finally obtain the steel plate that thickness is 60mm, the thickness of its surperficial cyan iron scale is 23 μm.
Embodiment three
Smelting molten steel and continuous casting become steel billet, and the thickness of steel billet is at 170mm, and steel billet Composition Control exists:
| Composition | C | Si | Mn | P | S | Nb | Ni | Mo | Ti | Alt | Fe and impurity |
| Content (wt, %) | 0.06 | 0.13 | 0.9 | 0.007 | 0.03 | 0.021 | 0.5 | 0.25 | 0.009 | 0.02 | 98.073 |
Carry out cooling in heap after 48 hours to steel billet, steel billet is put into heating furnace and heats, tapping temperature controls at 1200 DEG C, and time inside furnace is 110 ~ 140min, and soaking time is 20min.Steel billet after coming out of the stove adopts high-pressure water descaling in thick de-scaling place, and de-scaling temperature is about 1180 DEG C, and de-scaling pressure is 18MPa.Strand after de-scaling carries out four-pass roughing, and start rolling temperature is about 1210 DEG C, and finishing temperature is 1100 DEG C, accumulative drafts about 50%, and during roughing, previous three passes need carry out de-scaling before machine to strand, and de-scaling hydraulic pressure is 21MPa; After roughing, five passage finish rolling are carried out to steel billet, start rolling temperature is 1040 ± 15 DEG C, finishing temperature is about 890 DEG C, red temperature controls at about 670 DEG C, and drafts is about 45%, and mill speed is 1.5 ~ 3.5m/s, end three passage in finish rolling stage need carry out de-scaling before machine to strand, de-scaling hydraulic pressure is 19MPa, finally obtains the steel plate that thickness is 40mm, and the thickness of its surperficial cyan iron scale is 18 μm.
Embodiment four
Smelting molten steel and continuous casting become steel billet, and the thickness of steel billet is at 190mm, and steel billet Composition Control exists:
| Composition | C | Si | Mn | P | S | Nb | Ni | Mo | Ti | Alt | Fe and impurity |
| Content (wt, %) | 0.2 | 0.17 | 1.25 | 0.02 | 0.013 | 0 | 0.7 | 0.1 | 0.012 | 0.035 | 97.5 |
After carrying out cooling in heap to steel billet, steel billet is put into heating furnace and heats, tapping temperature controls at 1175 DEG C, and time inside furnace is 120 ~ 140min, and soaking time is 40min.Steel billet after coming out of the stove adopts high-pressure water descaling in thick de-scaling place, and de-scaling temperature is about 1160 DEG C, and de-scaling pressure is 20MPa.Strand after de-scaling carries out six passage roughing, and start rolling temperature is about 1130 DEG C, accumulative drafts about 80%, and during roughing, front four-pass need carry out de-scaling before machine to strand, and de-scaling hydraulic pressure is 20MPa; After roughing, seven passage finish rolling are carried out to steel billet, start rolling temperature is 1020 ± 15 DEG C, finishing temperature is about 900 DEG C, red temperature controls at about 650 DEG C, and accumulative drafts is about 85%, and mill speed is 1.5 ~ 3.5m/s, first passage in finish rolling stage and last three passages need carry out de-scaling before machine to rolled piece, de-scaling hydraulic pressure is 21MPa, finally obtains the steel plate that thickness is 10mm, and the thickness of its surperficial cyan iron scale is 11 μm.
In the present invention, for the steel plate that thickness is thicker, under the prerequisite ensureing plate property, optimize rolling procedure design, such as, suitably improve pass deformation rate, reduce rolling pass etc., and suitably improve finishing temperature, to improve iron scale plasticity.For not needing the steel plate that warm-rolling system of robbing, thickness are thicker, except de-scaling normal in intermediate rolling process, also need de-scaling before each passage in three roads, finish to gauge end.But, when temperature controls at need, de-scaling before each passage of finish to gauge last two passages at least should be ensured.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (5)
1. a control method for steekle mill surface of steel plate red scale, is characterized in that, carries out according to the following steps:
(1) strand composition is C0.06 ~ 0.25% by mass percentage, Si0.13 ~ 0.35%, Mn0.90 ~ 1.60%, P≤0.03%, S≤0.03%, Nb0 ~ 0.04%, Ni0 ~ 1%, Mo0 ~ 0.5%, Ti0 ~ 0.018%, Alt0.02 ~ 0.05%, all the other are Fe and impurity;
(2) strand enters heating furnace and heats, and tapping temperature controls at 1150 ~ 1250 DEG C, and time inside furnace is 110 ~ 170min;
(3) adopt high-pressure water descaling to strand after coming out of the stove, de-scaling temperature is 1140 ~ 1230 DEG C, and de-scaling pressure is at least 18MPa;
(4) carry out roughing to the strand after de-scaling and obtain steel billet, during roughing, start rolling temperature is 1120 ~ 1210 DEG C, and finishing temperature is 1030 ~ 1120 DEG C, drafts is 40 ~ 80%, for the steel plate of thickness G reatT.GreaT.GT 20mm, 4 or 6 passage roughing need be carried out, rough rolling step each de-scaling three passage; For the steel plate of thickness≤20mm, 4 or 6 passage roughing need be carried out, rough rolling step de-scaling three ~ four-pass;
(5) after roughing, finish rolling is carried out to steel billet, start rolling temperature is 980 ~ 1070 DEG C, drafts is 45 ~ 85%, mill speed is 1.5 ~ 3.5m/s, for the steel plate of thickness G reatT.GreaT.GT 20mm, need carry out 5 or 7 passage finish rolling, during finish rolling, pass deformation rate is 15 ~ 20%, finishing temperature is 885 ± 15 DEG C, finish rolling stage each de-scaling three passage; For the steel plate of thickness≤20mm, need carry out 7 or 9 passage finish rolling, during finish rolling, pass deformation rate is 13 ~ 25%, and finishing temperature is 875 ± 15 DEG C, finish rolling stage de-scaling three ~ four-pass.
2. the control method of steekle mill surface of steel plate red scale as claimed in claim 1, is characterized in that: for the steel plate not needing warm-rolling system of robbing, thickness >=14mm, and the finish rolling stage adopts last three passage de-scalings.
3. the control method of steekle mill surface of steel plate red scale as claimed in claim 1, is characterized in that: described strand red temperature in thick, finishing stands controls at 650 ± 30 DEG C.
4. the control method of steekle mill surface of steel plate red scale as claimed in claim 1, is characterized in that: described step (2) in strand enter heating furnace heating before employing cooling in heap mode slow cooling 48 hours.
5. the control method of steekle mill surface of steel plate red scale as claimed in claim 1, it is characterized in that: described slab thickness is 150 ~ 220mm, described steel sheet product thickness specification is 8 ~ 60mm.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140930A (en) * | 1998-11-05 | 2000-05-23 | Nkk Corp | Manufacture of hot rolling steel strip having thin scale |
| JP2008212956A (en) * | 2007-02-28 | 2008-09-18 | Jfe Steel Kk | Use method of descaling device in hot rolling and hot-rolling method using the same |
| CN101633995A (en) * | 2009-08-25 | 2010-01-27 | 武汉钢铁(集团)公司 | Ship hull steel with yield strength of more than or equal to 360MPa and good surface quality, and production method thereof |
| CN101704026A (en) * | 2009-12-03 | 2010-05-12 | 南京钢铁股份有限公司 | Method for controlling pitting on surface of medium steel plate |
| CN101856669A (en) * | 2010-06-02 | 2010-10-13 | 东北大学 | Control method of softness of oxide scales on surface of hot-rolling strip steel |
| CN101862760A (en) * | 2009-12-10 | 2010-10-20 | 南京钢铁股份有限公司 | High-pressure low-flow descaling process of four-roller reversing steckel mill |
| JP2011189394A (en) * | 2010-03-16 | 2011-09-29 | Nisshin Steel Co Ltd | Method for manufacturing hot rolled steel sheet having excellent surface property |
| CN103212571A (en) * | 2013-04-18 | 2013-07-24 | 湖南华菱湘潭钢铁有限公司 | Method for producing oxide scale capable of preventing steel plate surface from getting rusty |
| CN103394529A (en) * | 2013-07-31 | 2013-11-20 | 秦皇岛首秦金属材料有限公司 | Secondary descaling method for improving surface quality of ship boards |
| JP5569186B2 (en) * | 2010-06-29 | 2014-08-13 | 新日鐵住金株式会社 | Production line for hot rolled steel sheet and method for producing hot rolled steel sheet |
-
2014
- 2014-01-08 CN CN201410007581.1A patent/CN103769424B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000140930A (en) * | 1998-11-05 | 2000-05-23 | Nkk Corp | Manufacture of hot rolling steel strip having thin scale |
| JP2008212956A (en) * | 2007-02-28 | 2008-09-18 | Jfe Steel Kk | Use method of descaling device in hot rolling and hot-rolling method using the same |
| CN101633995A (en) * | 2009-08-25 | 2010-01-27 | 武汉钢铁(集团)公司 | Ship hull steel with yield strength of more than or equal to 360MPa and good surface quality, and production method thereof |
| CN101704026A (en) * | 2009-12-03 | 2010-05-12 | 南京钢铁股份有限公司 | Method for controlling pitting on surface of medium steel plate |
| CN101862760A (en) * | 2009-12-10 | 2010-10-20 | 南京钢铁股份有限公司 | High-pressure low-flow descaling process of four-roller reversing steckel mill |
| JP2011189394A (en) * | 2010-03-16 | 2011-09-29 | Nisshin Steel Co Ltd | Method for manufacturing hot rolled steel sheet having excellent surface property |
| CN101856669A (en) * | 2010-06-02 | 2010-10-13 | 东北大学 | Control method of softness of oxide scales on surface of hot-rolling strip steel |
| JP5569186B2 (en) * | 2010-06-29 | 2014-08-13 | 新日鐵住金株式会社 | Production line for hot rolled steel sheet and method for producing hot rolled steel sheet |
| CN103212571A (en) * | 2013-04-18 | 2013-07-24 | 湖南华菱湘潭钢铁有限公司 | Method for producing oxide scale capable of preventing steel plate surface from getting rusty |
| CN103394529A (en) * | 2013-07-31 | 2013-11-20 | 秦皇岛首秦金属材料有限公司 | Secondary descaling method for improving surface quality of ship boards |
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