CN1363430A - Conticasting-tandem rolling technology for producing coiled sheet - Google Patents
Conticasting-tandem rolling technology for producing coiled sheet Download PDFInfo
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- CN1363430A CN1363430A CN 01144953 CN01144953A CN1363430A CN 1363430 A CN1363430 A CN 1363430A CN 01144953 CN01144953 CN 01144953 CN 01144953 A CN01144953 A CN 01144953A CN 1363430 A CN1363430 A CN 1363430A
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- rolling
- dephosphorization
- roll bending
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Abstract
A conticasting-tandem rolling technology for producing coiled sheet includes such steps as conticasting, straightening, shearing, removing phosphorus, coarse rolling, soaking, removing phosphorus, fining rolling, cooling and coiling. Its advantages include high removal rate of oxide scales, high rolling rate, fine and compact crystal grains and high mechanical performance of products.
Description
Technical field
The present invention relates to the hot-rolled sheet coil plank stuff production technology, belong to the steel rolling technical field of producing.
Background technology
In the last few years, progressively adopt casting and rolling process to produce hot-rolled sheet coil sheet material in the metallurgy industry, the conventional production methods of this technology is that the sheet billet that direct casting goes out is directly sent into mill milling, its typical process flow is: continuous casting-aligning-shearing-soaking-dephosphorization-finish rolling-cooling-roll bending, though this process is comparatively advanced, still has following shortcoming in production practices:
1. the sheet billet that goes out of continuous casting directly enters the finish rolling operation with single thickness, fertilization roll compacting is contracted than restriction, finished product in can only rolling certain specification scope, when being 50MM as sheet billet thickness, can only rolling thickness be the roll bending of 1.2-12.7MM, so be unfavorable for the thickness specification of online change product, be unfavorable for tissue production;
2. when using the roll bending of the rolling less thickness of sheet billet of single thickness, the finish rolling entrance velocity is slow, is easy to generate the secondary oxidation skin in the finish rolling, influences product quality to a certain extent;
3. dephosphorization for once in the whole process flow, the dephosphorization number of times is less relatively, and dephosphorization is thorough inadequately.
For overcoming above-mentioned defective, should study and improve the existing processes flow process, so that make it more scientific and reasonable.
Summary of the invention
Technical problem to be solved by this invention provides a kind of continuous casting and rolling process for production of the roll bending that can be adjusted at line products thickness specification flexibly and help improving the quality of products.
The present invention realizes with following technical solution:
A kind of continuous casting and rolling process for production of roll bending, comprise following operation successively: direct casting-blank aligning-blank shearing-soaking-dephosphorization-finish rolling-cooling-roll bending, its improvement is, sets up the roughing operation before finish rolling dephosphorization operation, sets up the soaking operation after the roughing operation.
The continuous casting and rolling process for production of above-mentioned roll bending increases by one dephosphorization operation before the roughing operation.
The continuous casting and rolling process for production of above-mentioned roll bending, described roughing operation rolling pass are for once, and described finish rolling operation rolling pass is 5-6 time, and described dephosphorization operation adopts the dephosphorize by high pressure water method.
The present invention has following characteristics:
1. after before finish rolling dephosphorization operation, setting up the roughing operation, the continuous casting billet roughing of single thickness can be become different thickness, thereby can provide thickness suitable steel band base to the finish rolling operation, make the finish rolling operation can roll out the roll bending finished product of plurality of specifications according to the compression ratio that allows, the online production of available a kind of thickness continuous casting billet goes out the roll bending finished product of plurality of specifications thickness, can the thick roll bending of rolling 1.2-20MM as the thick continuous casting billet of 70MM, be very easy to organization of production, enlarged the product thickness specification limit, and the thickness continuous casting billet only allows the thick roll bending of rolling 1.2-12.7MM before improving, and system is very easy to production;
2. after increasing the roughing operation because the thickness that can suit provides the steel band base to the finish rolling operation, so roll when having eliminated the thin specification roll bending of the single thickness blank of former use finish rolling speed slow, rolling in the easy disadvantage of generation oxidation reaction;
3. can increase the dephosphorization number of times by the dephosphorization machine is installed after increasing the roughing operation before roughing mill, make the iron scale on steel band base surface in the operation of rolling after twice dephosphorization, just enter the finish rolling operation, can significantly improve the surface quality of roll bending;
4. increase the corresponding rolling pass that increased after the roughing operation, formation than the thick stock material through the rolling reasonable operation of rolling of multiple tracks, raw material increases with the thickness ratio of finished product, overall compression ratio increases in the operation of rolling, help improving the interior metal structure organization of finished product, crystal grain thinning makes the crystalline structure densification, thereby improves mechanical performance of products.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Consult Fig. 1, as shown in the figure, the present invention comprises following operation successively: direct casting-blank aligning-blank shearing-soaking-1 time dephosphorization-roughing-soaking-accident shear treatment-2 time dephosphorization-finish rolling-cooling-roll bending, be in detail: high-temperature molten steel forms thicker sheet billet through the crystallizer crystallization, and----entering straightening machine aligning----goes into billet shears and shears-go into No. 1 soaking pit heating and heat preservation and make it to reach 1 dephosphorization machine of roughing temperature-go into and carry out dephosphorization-go into the roughing mill roughing-the soaking pit heating and heat preservation-going into emergency shears (passes through during zero defects to go into No. 2, carry out shear treatment when having an accident)-2 dephosphorization machines dephosphorization-go into mm finishing mill unit finish rolling-gone into by laminar flow cooling and runout table-go into the coiling machine roll bending, afterwards again through shearing, bundling, weigh and just can put in storage behind the label.Wherein, the quantity of roughing mill is 1, and rolling pass is 1 time, and mm finishing mill unit is made up of 5-6 frame finishing mill, and the finish rolling rolling pass is 5-6 time, and 1, No. 2 soaking pit is the tunnel type soaking pit, and the dephosphorize by high pressure water mode is all adopted in 1,2 dephosphorization.
Claims (3)
1. the continuous casting and rolling process for production of a roll bending, its typical process flow is: direct casting blank aligning-blank shearing-soaking-dephosphorization-finish rolling-cooling-roll bending, it is characterized in that, before finish rolling dephosphorization operation, set up the roughing operation, after the roughing operation, set up the soaking operation.
2. according to the continuous casting and rolling process for production of the described roll bending of claim 1, it is characterized in that, before the roughing operation, increase by one dephosphorization operation.
3. according to the continuous casting and rolling process for production of claim 1 or 2 described roll bendings, it is characterized in that described roughing operation rolling pass is for once, described finish rolling operation system passage is 5-6 time, and described dephosphorization operation adopts the dephosphorize by high pressure water process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144953 CN1363430A (en) | 2001-12-25 | 2001-12-25 | Conticasting-tandem rolling technology for producing coiled sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144953 CN1363430A (en) | 2001-12-25 | 2001-12-25 | Conticasting-tandem rolling technology for producing coiled sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1363430A true CN1363430A (en) | 2002-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01144953 Pending CN1363430A (en) | 2001-12-25 | 2001-12-25 | Conticasting-tandem rolling technology for producing coiled sheet |
Country Status (1)
| Country | Link |
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| CN (1) | CN1363430A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825065A (en) * | 2012-09-13 | 2012-12-19 | 莱芜钢铁集团有限公司 | Rolling method for steel plates of wide and thin specifications |
| CN105834212A (en) * | 2016-05-16 | 2016-08-10 | 宋义 | Production technology for hot-rolled coiled plates and hot-rolled coiled plates |
| CN110052495A (en) * | 2019-04-24 | 2019-07-26 | 中冶赛迪工程技术股份有限公司 | A kind of long material endless rolling production line of short route and its milling method |
| CN110665980A (en) * | 2019-09-27 | 2020-01-10 | 江苏恒丰新材料制造有限公司 | Research, development and field application method of ESP hot rolling oil |
-
2001
- 2001-12-25 CN CN 01144953 patent/CN1363430A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825065A (en) * | 2012-09-13 | 2012-12-19 | 莱芜钢铁集团有限公司 | Rolling method for steel plates of wide and thin specifications |
| CN102825065B (en) * | 2012-09-13 | 2015-03-04 | 莱芜钢铁集团有限公司 | Rolling method for steel plates of wide and thin specifications |
| CN105834212A (en) * | 2016-05-16 | 2016-08-10 | 宋义 | Production technology for hot-rolled coiled plates and hot-rolled coiled plates |
| CN110052495A (en) * | 2019-04-24 | 2019-07-26 | 中冶赛迪工程技术股份有限公司 | A kind of long material endless rolling production line of short route and its milling method |
| CN110665980A (en) * | 2019-09-27 | 2020-01-10 | 江苏恒丰新材料制造有限公司 | Research, development and field application method of ESP hot rolling oil |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |