CN1974824A - Continuous casting and rolling process for producing thin IF billet - Google Patents
Continuous casting and rolling process for producing thin IF billet Download PDFInfo
- Publication number
- CN1974824A CN1974824A CN 200610098394 CN200610098394A CN1974824A CN 1974824 A CN1974824 A CN 1974824A CN 200610098394 CN200610098394 CN 200610098394 CN 200610098394 A CN200610098394 A CN 200610098394A CN 1974824 A CN1974824 A CN 1974824A
- Authority
- CN
- China
- Prior art keywords
- frame
- rolling
- continuous casting
- steel
- temperatures
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The continuous casting and rolling process for producing IF sheet billet includes the steps of converter smelting, LF furnace refining and continuous casting and rolling. The molten steel consists of C 0-0.0050 wt%, Si 0-0.03 wt%, Mn 0-0.60 wt%, P 0-0.015 wt%, S 0-0.010 wt%, Ti 6-10 times C+N, and Fe and inevitable impurity for the rest. Compared with available technology, the present invention has the advantages of expanded application range, etc. The IF sheet billet may be used in automobile, appliance, etc.
Description
Technical field:
The invention belongs to this technical field of continuous casting and rolling technique of sheet bar, especially belong to the technical field of the continuous casting and rolling technique of sheet bar of producing the IF steel.
Background technology:
Continuous casting and rolling technique of sheet bar as one of Iron And Steel Industry strip series products manufacturing novel process has obtained fast development in recent years at home and abroad.But owing to reasons such as equipment configuration and technology are immature, domestic each bar sheet billet continuous casting and rolling production line does not still have the precedent of producing ultra low carbon IF steel, the deep-draw that can't provide the mass market to be badly in need of cold rolling with the galvanized sheet raw material.
Summary of the invention:
Technical problem to be solved by this invention provides the production technique that a kind of CSP line is produced ultra low carbon IF steel,
The technical scheme of technical solution problem of the present invention is: a kind of CSP is produced the production technique of IF steel, comprises converter smelting operation, RH treatment process, LF stove refining procedure, sheet blank continuous casting and tandem rolling operation.The weight percent composition of its molten steel is: C:0-0.0050; Si:0-0.03; Mn:0-0.60; P:0-0.015; S:0-0.010; N:0-0.050; The C+N mass percent of Ti=6～10 times; All the other are iron and unavoidable impurities.
In the sheet blank continuous casting operation, described continuous tunnel furnace soaking temperature is 1130～1150 ℃; 1050～1100 ℃ of start rolling temperatures; 850～950 ℃ of finishing temperatures; 650～750 ℃ of coiling temperatures.
In the sheet blank continuous casting operation, preferably adopt 7 frames to be rolled: the relative draft 55～64% of the 1st～2 frame; The 3rd～5 frame 35～45%; The 6th frame 15～35%; The 7th frame 5-20%.
The applicant thinks by the RH vacuum-treat, reduces C, N content in the steel, handles by add Ti at the LF stove simultaneously, be combined into Ti (C with interstitial atom such as C, N in the steel, N) second phase, thus basically eliminate the interstitial atom in the steel, become gapless atomic steel (IF steel).For bar strip continuous casting and rolling flow path, the main difference of producing the IF steel with old process is: 1) control purity of steel by S content in the control steel; 2) big bag-middle bag-sheet blank continuous casting process increases the C control techniques; 3) big bag-middle bag-sheet blank continuous casting process increases the N control techniques; 4) Soaking Pit Temperature system; 5) hot-rolled temperature system and cooling system.
The present invention is compared with prior art: both solved the problem that the CSP line further enlarges product scope, can be follow-up cold rolling and pot galvanize simultaneously qualified IF steel raw material is provided, with the automobile that satisfies the high group of drawing, tame electroplax production demand, thereby create good economic benefit for enterprise.
Embodiment:
Non-limiting examples is as follows:
Working condition is 120 tons of converter smeltings, through ladle argon-blown, RH vacuum-treat and the refining of LF stove, enters sheet blank continuous casting.The model of used thinslab casting is CSP.
IF steel hot rolled coil method for testing performance is GB228;
Mechanical property test method is EN10327 after the pot galvanize of IF steel.
Embodiment 1: with blank process converter smelting operation, and LF stove refining procedure, the weight item of control molten steel is C:0.0042%; Si:0.067%; Mn:0.12%; P:0.012%; S:0.0010; Als:0.040%; Ca:0.0028%; N:0.0025%; Ti:0.0450%, be heated to 1130 ℃ by continuous tunnel furnace after, it is rolling to enter 7 frame tandem rolling units, 1050 ℃ of start rolling temperatures; 850 ℃ of finishing temperatures, the relative draft 55% of the 1st～2 frame; The 3rd～5 frame 35%; The 6th frame 29%; The 7th frame 20%, hot rolling thickness specification 1.8mm.Rolling postcooling to 650 ℃ batches.Through the rolling chill volume that becomes 0.35mm of 4 frame cold continuous rollings, send into follow-up bell-type annealing+smooth or galvanization production line, produce cold rolling and zinc-plated coil of strip.
Embodiment 2: with blank process converter smelting operation, and LF stove refining procedure, the weight item of control molten steel is C:0.0043%; Si:0.049%; Mn:0.10%; P:0.011%; S:0.0013; Als:0.051%; Ca:0.0051%; N:0.0045%; Ti:0.0600%, be heated to 1135 ℃ by continuous tunnel furnace after, it is rolling to enter 7 frame tandem rolling units, 1060 ℃ of start rolling temperatures; 870 ℃ of finishing temperatures, the relative draft 57% of the 1st～2 frame; The 3rd～5 frame 37%; The 6th frame 29%; The 7th frame 18%, hot rolling thickness specification 2.0mm.Rolling postcooling to 670 ℃ batches.Through the rolling chill volume that becomes 0.7mm of 4 frame cold continuous rollings, send into follow-up bell-type annealing+smooth or galvanization production line, produce cold rolling and zinc-plated coil of strip.
Embodiment 3: with blank process converter smelting operation, and LF stove refining procedure, the weight item of control molten steel is C:0.0045%; Si:0.041%; Mn:0.11%; P:0.010%; S:0.0010; Als:0.054%; Ca:0.0020%; N:0.0034%; Ti:0.0740%, be heated to 1140 ℃ by continuous tunnel furnace after, it is rolling to enter 7 frame tandem rolling units, 1070 ℃ of start rolling temperatures; 890 ℃ of finishing temperatures, the relative draft 59% of the 1st～2 frame; The 3rd～5 frame 39%; The 6th frame 22%; The 7th frame 17%, hot rolling thickness specification 3.0mm.Rolling postcooling to 690 ℃.Through the rolling chill volume that becomes 1.2mm of 4 frame cold continuous rollings, send into follow-up bell-type annealing+smooth or galvanization production line, produce cold rolling and zinc-plated coil of strip.
Embodiment 4: with blank process converter smelting operation, and LF stove refining procedure, the weight item of control molten steel is C:0.0038%; Si:0.048%; Mn:0.099%; P:0.013%; S:0.0041; Als:0.066%; Ca:0.0029%; N:0.0029%; Ti:0.0730%, be heated to 1145 ℃ by continuous tunnel furnace after, it is rolling to enter 7 frame tandem rolling units, 1080 ℃ of start rolling temperatures; 910 ℃ of finishing temperatures, the relative draft 61% of the 1st～2 frame; The 3rd～5 frame 41%; The 6th frame 30%; The 7th frame 18%, hot rolling thickness specification 4.0mm.Rolling postcooling to 710 ℃ batches.Through the rolling chill volume that becomes 1.5mm of 4 frame cold continuous rollings, send into follow-up bell-type annealing+smooth or galvanization production line, produce cold rolling and zinc-plated coil of strip.
Embodiment 5: with blank process converter smelting operation, and LF stove refining procedure, the weight item of control molten steel is C:0.0036%; Si:0.029%; Mn:0.12%; P:0.016%; S:0.0027; Als:0.035%; Ca:0.0030%; N:0.0025%; Ti:0.0490%, be heated to 1150 ℃ by continuous tunnel furnace after, it is rolling to enter 7 frame tandem rolling units, 1100 ℃ of start rolling temperatures; 950 ℃ of finishing temperatures, the relative draft 64% of the 1st～2 frame; The 3rd～5 frame 45%; The 6th frame 35%; The 7th frame 20%, hot rolling thickness specification 5.0mm.Rolling postcooling to 750 ℃ batches.Through the rolling chill volume that becomes 2.0mm of 4 frame cold continuous rollings, send into follow-up bell-type annealing ten smooth or galvanization production lines, produce cold rolling and zinc-plated coil of strip.
The hot rolled coil performance of embodiment 1-5 is as shown in table 1:
Table 1:
| Sequence number | σ s(MPa) | σ b(MPa) | δ 5(％) | Clod wash |
| Embodiment 1 | 275 | 355 | 35.0 | Qualified |
| Embodiment 2 | 275 | 355 | 40.5 | Qualified |
| Embodiment 3 | 275 | 350 | 39.0 | Qualified |
| Embodiment 4 | 285 | 360 | 39 | Qualified |
| Embodiment 5 | 265 | 340 | 43 | Qualified |
Mechanical property is as shown in table 2 after the pot galvanize of embodiment 1-5:
Table 2:
| Sequence number | R p0.2(MPa) | R m(MPa) | Yield tensile ratio | A80％ | n 90 | n | r 90 | r |
| Embodiment 1 | 186 | 333 | 0.56 | 36.5 | 0.21 | 0.22 | 1.63 | 1.48 |
| Embodiment 2 | 179 | 324 | 0.55 | 38.3 | 0.22 | 0.22 | 1.86 | 1.57 |
| Embodiment 3 | 180 | 327 | 0.54 | 41.5 | 0.23 | 0.23 | 1.98 | 1.77 |
| Embodiment 4 | 174 | 337 | 0.52 | 42.0 | 0.22 | 0.23 | 2.12 | 1.80 |
| Embodiment 5 | 170 | 335 | 0.51 | 39.7 | 0.23 | 0.23 | 2.17 | 1.81 |
Claims (3)
1, a kind of CSP is produced the production technique of IF steel, comprises the converter smelting operation, LF stove refining procedure, and the sheet blank continuous casting operation is characterized in that: the weight percent composition of its molten steel is: C:0-0.0050; Si:0-0.03; Mn:0-0.60; P:0-0.015; S:0-0.010; N:0-0.050; The mass percent of Ti=6～10 times C+N; All the other are iron and unavoidable impurities.
2, the production technique of a kind of CSP production IF steel according to claim 1, it is characterized in that: in the sheet blank continuous casting operation, described continuous tunnel furnace soaking temperature is 1130～1150 ℃; 1050～1100 ℃ of start rolling temperatures; 850～950 ℃ of finishing temperatures; 650～750 ℃ of coiling temperatures.
3, the production technique of a kind of CSP production IF steel according to claim 1 is characterized in that: in the sheet blank continuous casting operation, adopt 7 frames to be rolled: the relative draft 55～64% of the 1st～2 frame; The 3rd～5 frame 35～45%; The 6th frame 15～35%; The 7th frame 5-20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100983944A CN100485074C (en) | 2006-12-18 | 2006-12-18 | Continuous casting and rolling process for producing IF steel form thin slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100983944A CN100485074C (en) | 2006-12-18 | 2006-12-18 | Continuous casting and rolling process for producing IF steel form thin slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1974824A true CN1974824A (en) | 2007-06-06 |
| CN100485074C CN100485074C (en) | 2009-05-06 |
Family
ID=38125169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100983944A Active CN100485074C (en) | 2006-12-18 | 2006-12-18 | Continuous casting and rolling process for producing IF steel form thin slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485074C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348884B (en) * | 2008-09-11 | 2010-05-12 | 北京科技大学 | 440MPa grade niobium-containing high-strength IF steel and manufacturing method thereof |
| CN101941024A (en) * | 2010-07-22 | 2011-01-12 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating peeling of IF steel edge in hot continuous rolling process |
| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
| CN102691009A (en) * | 2012-05-28 | 2012-09-26 | 牛自院 | High-temperature and high-conductivity alloy material and application thereof in electrode |
| CN101352946B (en) * | 2007-07-23 | 2013-02-06 | 宝山钢铁股份有限公司 | Hot-dip aluminizing zincium steel plate/belt for deep drawing and method for producing the same |
| CN110016610A (en) * | 2019-03-20 | 2019-07-16 | 包头钢铁（集团）有限责任公司 | Low nitrogen ultra low-carbon steel of a kind of Ti system and preparation method thereof |
-
2006
- 2006-12-18 CN CNB2006100983944A patent/CN100485074C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352946B (en) * | 2007-07-23 | 2013-02-06 | 宝山钢铁股份有限公司 | Hot-dip aluminizing zincium steel plate/belt for deep drawing and method for producing the same |
| CN101348884B (en) * | 2008-09-11 | 2010-05-12 | 北京科技大学 | 440MPa grade niobium-containing high-strength IF steel and manufacturing method thereof |
| CN101941024A (en) * | 2010-07-22 | 2011-01-12 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating peeling of IF steel edge in hot continuous rolling process |
| CN101941024B (en) * | 2010-07-22 | 2012-06-27 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating peeling of IF steel edge in hot continuous rolling process |
| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
| CN102691009A (en) * | 2012-05-28 | 2012-09-26 | 牛自院 | High-temperature and high-conductivity alloy material and application thereof in electrode |
| CN102691009B (en) * | 2012-05-28 | 2013-11-27 | 牛自院 | High-temperature and high-conductivity alloy material and application thereof in electrode |
| CN110016610A (en) * | 2019-03-20 | 2019-07-16 | 包头钢铁（集团）有限责任公司 | Low nitrogen ultra low-carbon steel of a kind of Ti system and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100485074C (en) | 2009-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111020437B (en) | Manufacturing method of hot-dip galvanized steel strip with yield strength of above 580Mpa grade | |
| CN105112776A (en) | Phosphorus-containing low-carbon cold-rolled hard tin-plated steel plate and production method thereof | |
| CN104928457A (en) | Method for producing high-ductility ferritic stainless steel band through furnace roll and continuous mill | |
| CN103510002A (en) | Gapless atom cold-rolled hot-galvanized steel plate and production method thereof | |
| CN101941021A (en) | Method for producing extra-deep drawing cold-rolled steel plate based on ASP process | |
| CN112359285B (en) | Ageing-resistant cold-rolled continuously annealed steel strip and manufacturing method thereof | |
| CN100485074C (en) | Continuous casting and rolling process for producing IF steel form thin slab | |
| CN107287513B (en) | Tin plate and preparation method thereof | |
| CN105525214A (en) | Cold rolling hard tinning steel plate and production method thereof | |
| CN105349884A (en) | Ti-contained hot-rolled and acid-pickled enameled steel strip and production method thereof | |
| CN101818299A (en) | High-strength thin-specification direct-plating steel based on thin slab casting and rolling process and making method thereof | |
| CN104593673A (en) | Medium carbon non-annealed cold heading steel hot rolled wire rod and production method thereof | |
| CN104726765A (en) | 1000MPa-grade high-strength cold-rolled packed steel strip and production method thereof | |
| CN103510001B (en) | A kind of double coiled welded tube cold-rolled steel sheet and production method thereof | |
| CN104651715A (en) | Cold-rolled steel plate, preparation method of cold-rolled steel plate, hot-dip galvanized steel plate, and preparation method of hot-dip galvanized steel plate | |
| CN104946971A (en) | Preparation method for high-performance stamping cold-rolled and galvanized steel strip | |
| CN105238995A (en) | Hot-rolled pickled plate for hydraulic-formed steel pipe and manufacturing method thereof | |
| CN115537669B (en) | Production method of continuously annealed low-alloy high-strength cold-rolled steel plate | |
| CN101033523A (en) | Hot rolled steel plate for automobile beam and production method thereof | |
| CN114226453B (en) | Manufacturing method for low-carbon steel and improving performance uniformity of ferrite-rolled low-carbon steel | |
| CN114160576B (en) | Control method for transverse fold lines of low-carbon steel hot rolled commodity coil for structure | |
| CN115478203A (en) | Method for producing hot-rolled thin strip steel based on thin strip casting and rolling and ultrahigh-strength part | |
| CN104651712A (en) | CQ-grade hot-dip galvanization steel strip for anti-theft door plate and production process thereof | |
| CN101649423B (en) | Niobium micro-alloying gap-free hot rolled strip and manufacture method thereof | |
| CN103614617A (en) | Steel for motor turbine of roller washing machine and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 243003 Department of intellectual property right of Hunan West Road No. 8 technology center, Ma'anshan City, Anhui Province Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 technical center, 8 West Hunan Road, Ma'anshan, Anhui Patentee before: Ma'anshan Iron and Steel Co., Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 243003 8 Jiuhua Road, Yushan, Ma'anshan, Anhui Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Patentee before: Ma'anshan Iron and Steel Co., Ltd. |
|
| CP02 | Change in the address of a patent holder |