CN205270332U - Coil production line - Google Patents
Coil production line Download PDFInfo
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- CN205270332U CN205270332U CN201620037043.1U CN201620037043U CN205270332U CN 205270332 U CN205270332 U CN 205270332U CN 201620037043 U CN201620037043 U CN 201620037043U CN 205270332 U CN205270332 U CN 205270332U
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- cooling
- water
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Abstract
The utility model discloses a coil production line, including the heating furnace, thick in, in advance finish rolling, finishing mill group, subtract sizing unit, laying head, air -cooled line, collection and roll up equipment such as station, the blank accomplishes 1 in proper order on above -mentioned equipment) the heating, 2) the roughing rolls in and, 3) finish rolling and finish rolling in advance, 4) subtract the sizing, 5) weave silk, 6) the quick cooling in back of weaving silk, 7) air -cooled line control cooling and 8) the collection roll up with the step of packing, the rolled piece does not pass through the water -cooling through subtract the sizing after, directly gets into laying head, water blocking phenomenon when effectively having avoided the small dimension to wear water, and reduction production fault rate has shortened and has subtracted sizing to laying head interval, has reduced the cooling line length, through two section back water -coolings and the forced air cooling combination of weaving silk, improved cooling efficiency, realized that the control tissue changes, reduced the investment, improved market competition.
Description
Technical field
The utility model belongs to metallurgical industry gren rod technical field, is specifically related to one and coils production line.
Background technology
Wire rod as one of the staple product of steel industry, extensively for building, machinery and Steel Wire Products Industry. In recent years, output continues to increase, and 2014 annual production reach 1.54 hundred million tons, reaches the 18.7% of China's crude steel total amount.
Iron and Steel Production need to consume a large amount of energy, and environmental influence is huge, requires day by day under exacting terms in current energy and environment, reduces production energy consumption and the contradiction that improves between steel product performance grows in intensity.
The modes such as continuous casting and rolling, hot-loading and hot-conveying, controlled rolling and controlled cooling are adopted can effectively to reduce energy consumption, simultaneously can under the prerequisite not adding microalloy element, by modes of production such as under the big pressure of low temperature and fast coolings, fining austenite grains, and then refinement the finished product tissue, obtain the good product of intensity, plasticity by the mode such as refined crystalline strengthening, phase transformation strengthening.
Adopt under the big pressure of low temperature and fast process for cooling can effective crystal grain thinning, current high-speed rod finish to gauge operation equips, mainly through the flexible reducing-sizing mill (FlexibleReducing&Sizing) of root RSM reducing-sizing mill (Reducing&SizingMill) that rubs, Da Nieli TMB bimodulus block unit (TwinModuleBlock) and western mark FRS etc., the distortion amount realizing controlled rolling. Control to subtract to determine footpath temperature in by subtracting the water volume in water tank before determining footpath and variation in water pressure, control temperature when rolled piece enters Laying head by subtracting the water volume in water tank after determining footpath and variation in water pressure.
But subtracting of adopting at present determines water-cooling pattern control wire temperature before and after footpath, and there are the following problems: will ensure that wire rod enters and subtract surface temperature when determining footpath and Laying head entrance and section temperature difference, longer " reply section " is needed after rolled piece is cold, production line length can be increased, construction is increased, and Workshop Production energy consumption increases, production cost increases. Such as the outlet of certain high-speed wire production line finishing train, to subtracting, to determine footpath access space be 53m, subtracts that to determine footpath outlet be 24.5m to Laying head spacing.
For meeting high-speed rod high-quality steel Production requirement, simultaneously more and more instantly thin in the profit of current steel products, this problem is outstanding all the more, when Rolling Production operation can not reduce, need to consider to optimize other process links of whole workshop, reduce workshop energy consumption and cost, it is to increase Workshop Production efficiency and productive profit.
For Problems existing in current high-speed wire mill, the present invention proposes a kind of high strength high-quality and coils production method and production line, effectively reduce rolling line length, lower construction investment and construction, it is to increase production efficiency, reduce energy consumption in production run, effectively reduce production cost, improve productive profit, bring distinct economic to enterprise, promote enterprise competitiveness.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of high strength high-quality to coil production line, and the investment of this production line and tooling cost are low, are easy to realize suitability for industrialized production, have obvious economic benefit, and can significantly improve wire rod performance.
For achieving the above object, the utility model provides following technical scheme: one coils production line, comprise the process furnace being successively set on rolling centerline, roughing mills, intermediate mill, pre-finishing mill group, finishing train, reducing-sizing mill, Laying head, collection volume station, PF line and bander, described intermediate mill, it is equipped with crop flying shear before pre-finishing mill group and finishing train, it is equipped with water tank after described pre-finishing mill group and finishing train, it is provided with air-cooled line between described Laying head and collection volume station, it is provided with water tank between described pre-finishing mill group, water tank or water smoke cooling section it is provided with between described Laying head and air-cooled line.
Further, described process furnace is walking beam heating furnace.
Further, water tank or water smoke cooling section between described Laying head and air-cooled line have two groups, are separately positioned on air-cooled line inlet end and center.
Further, distance between two groups of water tanks or water smoke cooling section is 10m��60m.
The beneficial effects of the utility model are:
1) subtract determine footpath after rolled piece without water-cooled, directly enter Laying head to weave silk, shorten the distance subtracting and determining between footpath to Laying head, decrease cooling line length, reduce manufacturer's investment, cancel Water cooling device between this process island, water blocking phenomenon when effectively avoiding little specification to wear water, reduce fault in production rate;
2) two sections of water-cooleds after Laying head or water smoke substantially increase cooling efficiency, more easily realize control automatically, it is to increase lumber recovery, adopt water-cooled or water smoke cooling can reduce cooling line length simultaneously, reduce manufacturer's investment, it is to increase the market competitiveness;
3) the wire rod excellent performance produced, tissue stabilization, has good development prospect, meets the strategy of sustainable development.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and useful effect clearly, the utility model provides following accompanying drawing to be described:
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
The utility model coils production line, comprise the process furnace 1 being successively set on rolling centerline, roughing mills 2, intermediate mill 3, pre-finishing mill group 4, finishing train 5, reducing-sizing mill 6, Laying head 7, collection volume station 8, PF line and bander, described intermediate mill 3, it is equipped with crop flying shear 9 before pre-finishing mill group 4 and finishing train 5, it is equipped with water tank 10 after described pre-finishing mill group 4 and finishing train 5, it is provided with air-cooled line 11 between described Laying head 7 and collection volume station 8, it is provided with water tank 10 between described pre-finishing mill group 4, water tank 10 or water smoke cooling section it is provided with between described Laying head 7 and air-cooled line 11.
The present embodiment adds water tank 10 on the one hand between pre-finishing mill group, and by increasing a rolled piece temperature-fall period to shorten production line length, the temperature making rolled piece enter finishing train ingress is effectively controlled; On the other hand, reducing-sizing mill 6 directly connects with Laying head 7, directly enters Laying head 7 from reducing-sizing mill 6 rolled piece out without water-cooled; This interval eliminates Water cooling device, but the water tank and air-cooled line by Laying head rear cools, not only increase cooling efficiency, achieve control structural transformation, significantly improve intensity, plasticity and the toughness coiled, more shorten the distance between reducing-sizing mill to Laying head, decrease cooling line length, reduce investment; Effectively prevent water blocking phenomenon when little specification wears water, reduce fault in production rate.
Process furnace in the present embodiment is walking beam heating furnace.
As the further improvement of such scheme, water tank 10 or water smoke cooling section between described Laying head 7 and air-cooled line 11 have two groups, are separately positioned on air-cooled line 11 inlet end and center; For ensureing to coil cooling performance, the distance between two groups of water tanks 10 or water smoke cooling section is 10m��60m.
Adopt above-mentioned production line to produce the method coiled, comprise the following steps successively:
(1) heat: adopt walking beam heating furnace by heating steel billet to 950 DEG C��1250 DEG C.
(2) roughing and in roll: the steel billet after heating enters roughing mills and intermediate mill rolling successively, rolling temperature control, and wherein, rough rolling of steel billets temperature controls at 900 DEG C��1200 DEG C, and the coefficient of extension of single pass roughing rolling controls between 1.15��1.4.
(3) pre-finish rolling and finish rolling: arrange water tank between pre-finishing mill group, in roll after rolled piece enter pre-finishing mill group rolling, between pre-finishing mill group, arrange that the rolled piece entering pre-finishing mill group is carried out water-cooled by water tank, after pre-finish rolling, rolled piece carries out Water cooling, rear rolled piece enters finishing train finish rolling, and finishing train temperature in controls at 800��950 DEG C.
(4) subtract and determine footpath: rolled piece enters Water cooling before reducing-sizing mill, the object of this section of Water cooling be accurately control subtract fixed diameter rolling temperature range near Ar3 (starting to precipitate out the critical temperature line of F when iron-carbon cools in austenite A) in, entering temperature controls between 730 DEG C��850 DEG C, rolling under the big pressure of single pass is adopted after entering, by this stage rolling, make rolled piece generation deformation to induce ferrite transformation.
(5) weaving silk: the rolled piece through reducing-sizing mill rolling deformation enters Laying head through pinch roll and weaves silk, laying temperature controls between 650 DEG C��850 DEG C.
(6) cool fast after weaving silk: the rolled piece after weaving silk enters Water cooling or water smoke cooling line, is quickly cooled between 450 DEG C��550 DEG C with the speed of cooling of >=10 DEG C/s, and arbitrary rolled piece temperature difference controls within the scope of �� 30 DEG C.
(7) air-cooled line controlled cooling model: then rolled piece enters air-cooled line cooling, ensures rolled piece generation bainite transformation, and air-cooled line blower fan opening degree controls between 0��100%, and speed of cooling is 0.1 DEG C/s��5 DEG C/s; Air-cooled line blower fan opening degree is opened as required, and when air-cooled line blower fan cuts out, this step is equivalent to insulation, and when air-cooled line blower fan is opened completely, this step is equivalent to another quick cooling step; Through air-cooled or insulation after rolled piece occur reply and recovery temperature higher than 650 DEG C time, repeating step (6) again, guaranteeing that cooling rear skin temperature is 450 DEG C��550 DEG C, promote that ultra-fine brilliant perlite or sorbite change, then rolled piece again enters air-cooled line and carries out controlled cooling model.
(8) collection volume with packing: shaping band coil enter after air-cooled line collection volume station curling, coil collection volume temperature be 250 DEG C��450 DEG C, coil subsequently enter PF line cooling, packing, roll off the production line, warehouse-in.
As the further improvement of such scheme, subtracting fixed diameter rolling passage during Deformed Steel Bars rolling is two passages, and subtracting fixed diameter rolling passage during other rod rollings is four-pass. By the control of each technological process, to realize in the rolling of critical austenitic area, top layer core portion homogeneous deformation (mainly referring to that top layer, core temperature are even) and evenly cooling fast, realize thinning microstructure, control tissue morphology, it is to increase the object of obdurability.
The method is adopted to produce Deformed Steel Bars, the microstructure of its finished product is deformation induced ferrite+bainite, it is close grain or superfine crystal particle, grain-size is less than 3 ��m, there are higher intensity and plasticity and toughness, combine owing to being organized as the soft or hard of ferrite+bainite, therefore tissue has lower yield tensile ratio, as produced normal carbon Ribbed Bar, its yield strength is at more than 500MPa, tensile strength is at more than 650MPa, unit elongation is more than 20%, clod wash, anti-clod wash can meet GB1499.2-2007 standard completely, there are good plasticity and toughness, weldability and anti-seismic performance. if producing the steel grade such as bearing steel, cord steel, its microstructure is the even ultra-fine brilliant pearlitic structure of thin brilliant perlite, and its yield strength, tensile strength, low-temperature flexibility can meet standard-required all completely.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although the utility model being described in detail by above preferred embodiment, but those skilled in the art are to be understood that, in the form and details it can be made various change, and do not deviate the utility model claim book limited range.
Claims (4)
1. coil production line for one kind, comprise process furnace, roughing mills, intermediate mill, pre-finishing mill group, finishing train, reducing-sizing mill, Laying head, collection volume station, PF line and the bander being successively set on rolling centerline, it is equipped with crop flying shear before described intermediate mill, pre-finishing mill group and finishing train, it is equipped with water tank after described pre-finishing mill group and finishing train, it is provided with air-cooled line between described Laying head and collection volume station, it is characterized in that: between described pre-finishing mill group, be provided with water tank, between described Laying head and air-cooled line, it is provided with water tank or water smoke cooling section.
2. according to claim 1 coil production line, it is characterised in that: described process furnace is walking beam heating furnace.
3. according to claim 1 and 2 coil production line, it is characterised in that: water tank or water smoke cooling section between described Laying head and air-cooled line have two groups, are separately positioned on air-cooled line inlet end and center.
4. according to claim 3 coil production line, it is characterised in that: the distance between two groups of water tanks or water smoke cooling section is 10m��60m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037043.1U CN205270332U (en) | 2016-01-14 | 2016-01-14 | Coil production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037043.1U CN205270332U (en) | 2016-01-14 | 2016-01-14 | Coil production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205270332U true CN205270332U (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620037043.1U Withdrawn - After Issue CN205270332U (en) | 2016-01-14 | 2016-01-14 | Coil production line |
Country Status (1)
| Country | Link |
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| CN (1) | CN205270332U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665442A (en) * | 2016-01-14 | 2016-06-15 | 中冶赛迪工程技术股份有限公司 | Coil production method and production line thereof |
| CN112077140A (en) * | 2020-09-04 | 2020-12-15 | 南京钢铁股份有限公司 | Control method for reducing extrusion damage to surface of wire spring steel |
-
2016
- 2016-01-14 CN CN201620037043.1U patent/CN205270332U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665442A (en) * | 2016-01-14 | 2016-06-15 | 中冶赛迪工程技术股份有限公司 | Coil production method and production line thereof |
| CN112077140A (en) * | 2020-09-04 | 2020-12-15 | 南京钢铁股份有限公司 | Control method for reducing extrusion damage to surface of wire spring steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20171215 |
|
| AV01 | Patent right actively abandoned |