CN107855368A - Cooling means after steel rolling - Google Patents
Cooling means after steel rolling Download PDFInfo
- Publication number
- CN107855368A CN107855368A CN201710999591.1A CN201710999591A CN107855368A CN 107855368 A CN107855368 A CN 107855368A CN 201710999591 A CN201710999591 A CN 201710999591A CN 107855368 A CN107855368 A CN 107855368A
- Authority
- CN
- China
- Prior art keywords
- cooled
- cooling means
- guan
- cooling
- temperature
- 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
Classifications
-
- 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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0203—Cooling
-
- 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
Abstract
The invention discloses the cooling means after a kind of steel rolling, wherein, the cooling means includes：1) the Guan Gangjing jets after finish to gauge are cooled to surface temperature as 800 850 DEG C；2) it is 880 920 DEG C that the pipe steel after above-mentioned jet is cooled down, which stands and risen again to surface temperature,；3) Guan Gang after above-mentioned standing is risen again be cooled to temperature for after 800 850 DEG C, be placed in it is air-cooled under the conditions of be cooled to temperature as 400 500 DEG C；Wherein, the cooldown rate in step 1) is 2.2 2.8 DEG C/s.The present invention cools down the Guan Gangxian after finish to gauge through jet, risen again again by its surface temperature of transition temperature inside Guan Gang, carry out again air-cooled, reach on the premise of milling train production is not influenceed, by cooling control after rolling technical measures improve SA 210C high-pressure boiler pipes banded structure, and and then improve made from SA 210C high-pressure boiler pipes quality.
Description
Technical field
The present invention relates to steel rolling production process field, in particular it relates to the cooling means after steel rolling.
Background technology
It is generally acknowledged that the reason for producing banded structure is mainly during steel-making continuous casting caused by component segregation, prior art
In often by control pulling speed of continuous casting, the degree of superheat, adjustment electricity stir to improve banded structure.And the carbon in SA-210C steel contains
Measure for 0.17-0.23%, the regulating measures of above-mentioned conventional steelmaking process it is little to the improvement of the steel grade banded structure.
And control start rolling temperature and finishing temperature to improve banded structure in rolling process, but this technique necessarily affects milling train
Rhythm of production, and then rolling mill yield is influenceed, while the increase of milling train produce load equipment fault hidden danger is occurred.
Therefore it provides it is a kind of on the premise of milling train production is not influenceed, it can be effectively improved using SA-210C steel and be used as original
The banded structure of the steel part of material, the cooling means after the steel rolling for the quality scale for improving product are asking for urgent need to resolve of the present invention
Topic.
The content of the invention
For above-mentioned prior art, it is an object of the invention to overcome in the prior art by controlling pulling speed of continuous casting, overheat
Degree, adjustment electricity stir it is little to the effect of SA-210C steel in a manner of improving banded structure, rolling process control start rolling temperature
The problems such as mode of banded structure also would necessarily affect the quality of milling train can also be improved with finishing temperature, so as to provide one kind
On the premise of milling train production is not influenceed, the banded structure using SA-210C steel as the steel part of raw material can be effectively improved, is carried
Cooling means after the steel rolling of the quality scale of high product.
To achieve these goals, the invention provides the cooling means after a kind of steel rolling, wherein, the cooling means bag
Include：
1) the Guan Gangjing jets after finish to gauge are cooled to surface temperature as 800-850 DEG C；
2) it is 880-920 DEG C that the pipe steel after above-mentioned jet is cooled down, which stands and risen again to surface temperature,；
3) Guan Gang after above-mentioned standing is risen again be cooled to temperature for after 800-850 DEG C, be placed in it is air-cooled under the conditions of be cooled to
Temperature is 400-500 DEG C；Wherein,
Cooldown rate in step 1) is 2.2-2.8 DEG C/s.
Preferably, air-cooled in step 3) comprises at least the first cooling section and the second cooling section, and the first cooling section be from
800-850 DEG C is cooled to 720-780 DEG C, and the second cooling section is to be cooled to 400-500 DEG C from 720-780 DEG C；Wherein,
The cooldown rate of first cooling section is 2.2-2.8 DEG C/s；
The cooldown rate of second cooling section is 1.5-2.1 DEG C/s.
Preferably, jet is cooled to cool down pipe steel by multiple ring spargers in step 1), and multiple sprays
Length direction of the ring along the Guan Gang is uniform, and the spray ring surface is formed as octagon, and the length of side is 10-30cm, the spray
The center for drenching each edge of ring is each provided with nozzle.
Preferably, the distance between two adjacent ring spargers are 10-30cm.
Preferably, the flow of the current sprayed in each nozzle is 150-200mL/s.
Preferably, it is cold to be placed in the enterprising sector-style of cold bed in step 3).
Preferably, when Guan Gang diameter is not less than 100mm, formed with gap between adjacent two Guan Gang；Work as Guan Gang
Diameter when being less than 100mm, adjacent two pipe steel can contact placement.
Preferably, the distance in the gap between two Guan Gang formed with gap is the 4/5-6/5 of pipe steel diameter.
Guan Gangxian after finish to gauge is cooled to surface by Pass through above-mentioned technical proposal, the present invention through jet with certain cooldown rate
Temperature is 800-850 DEG C, then is risen again to 880-920 DEG C, further by its surface temperature of transition temperature inside Guan Gang
Guan Gangxian after above-mentioned rise again is cooled to temperature as after 800-850 DEG C, then be placed in it is air-cooled under the conditions of be cooled to 400-500 DEG C,
And then cause by the above-mentioned type of cooling, reach on the premise of milling train production is not influenceed, changed by cooling control after rolling technical measures
The banded structure of kind SA-210C high-pressure boiler pipes, and and then SA-210C high-pressure boiler pipes made from improving quality.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
The invention provides the cooling means after a kind of steel rolling, wherein, the cooling means includes：
1) the Guan Gangjing jets after finish to gauge are cooled to surface temperature as 800-850 DEG C；
2) it is 880-920 DEG C that the pipe steel after above-mentioned jet is cooled down, which stands and risen again to surface temperature,；
3) Guan Gang after above-mentioned standing is risen again be cooled to temperature for after 800-850 DEG C, be placed in it is air-cooled under the conditions of be cooled to
Temperature is 400-500 DEG C；Wherein,
Cooldown rate in step 1) is 2.2-2.8 DEG C/s.
Guan Gangxian after finish to gauge is cooled to surface temperature as 800-850 DEG C by the present invention through jet using certain cooldown rate,
Risen again again by its surface temperature of transition temperature inside Guan Gang to 880-920 DEG C, further by the pipe after above-mentioned rise again
Steel is first cooled to temperature as after 800-850 DEG C, then be placed in it is air-cooled under the conditions of be cooled to 400-500 DEG C, and then cause by above-mentioned
The type of cooling, reach on the premise of milling train production is not influenceed, improve SA-210C high-pressure boilers by cooling control after rolling technical measures
The banded structure of pipe, and and then improve made from SA-210C high-pressure boiler pipes quality.
In a kind of preferred embodiment of the present invention, in order to further improve the quality of obtained product, improve it
Banded structure structure, air-cooled in step 3) could be arranged to comprise at least the first cooling section and the second cooling section, and first is cold
But for section to be cooled to 720-780 DEG C from 800-850 DEG C, the second cooling section is to be cooled to 400-500 DEG C from 720-780 DEG C.
Further, the cooldown rate of above-mentioned two cooling section can be further defined, and be carried with being better achieved
The effect of high product quality, wherein, the cooldown rate of the first cooling section can be further defined to 2.2-2.8 DEG C/s；Second is cold
But the cooldown rate of section can be further defined to 1.5-2.1 DEG C/s.
Certainly, as long as jet cooling here carries out spray cooling by coolant to it, the one of the present invention
In the embodiment that kind is more highly preferred to, for example, in order to reach more preferable cooling effect, further improve its banded structure structure,
Jet cooling can be further selected as cooling down pipe steel by multiple ring spargers in step 1), and multiple ring spargers
It is uniform along the length direction of the Guan Gang.Here ring sparger can be further selected as being set to octagonal cylinder knot
Structure, or at least its surface is formed as octagon, and it becomes to be further selected as 10-30cm, further, the ring sparger
The center of each edge is each provided with nozzle, i.e., 8 nozzles are provided with each ring sparger, are seldom repeated herein.When
So, the quantity of ring sparger can be selected according to being actually needed, for example, in a kind of preferred embodiment, ring sparger can be with
3-8 groups are arranged to, it is possible to further select as 5 groups, certainly, other quantity also can use herein.
Further, in a kind of preferred embodiment of the present invention, the distance between adjacent two ring spargers can
To select as 10-30cm.Certainly, distance mentioned here can be the beeline between two ring spargers, i.e., as close
Two ring spargers end points at distance, or the distance between ring sparger center (i.e. octagonal center), herein
Seldom repeat.
In a kind of preferred embodiment of the present invention, the flow of the current sprayed in each nozzle is 150-200mL/
s。
Air-cooled process in step 3) can be selected in a conventional manner, for example, one kind in the present invention is preferable
Can be that to be placed in the enterprising sector-style of cold bed cold in embodiment, in step 3).
Certainly, the modes of emplacement of air-cooled process middle pipe steel here can be selected according to being actually needed, for example, can be with
It is placed side by side along transmission direction for more Guan Gang.Further, when Guan Gang diameter is not less than 100mm, adjacent two pipes
Formed with gap between steel；When Guan Gang diameter is less than 100mm, adjacent two pipe steel can contact placement.Here between
Gap can be understood as two Guan Gang when placing, between certain space is set, and contact and place, i.e., both can be affixed with side wall
Conjunction seldom repeats herein.
In a kind of embodiment being more highly preferred to of the present invention, gap between two Guan Gang formed with gap away from
From the 4/5-6/5 that can be further selected as pipe steel diameter.
To sum up, first, cooling procedure takes cooldown rate first quick and back slow so that phase transition temperature area is in when beginning to cool down
Between so that carbon uniformly separates out.Conventional steel rolling and then it is aided with the product that the type of cooling of the present invention obtains, it is organized
State is preferable, and banded structure rank is low, can be down to less than 2 grades by more than 3 grades of routine, and do not have Wei Shi bodies, bainite etc.
Abnormal structure, substantially increase the quality of product.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (8)
1. the cooling means after a kind of steel rolling, it is characterised in that the cooling means includes：
1) the Guan Gangjing jets after finish to gauge are cooled to surface temperature as 800-850 DEG C；
2) it is 880-920 DEG C that the pipe steel after above-mentioned jet is cooled down, which stands and risen again to surface temperature,；
3) Guan Gang after above-mentioned standing is risen again be cooled to temperature for after 800-850 DEG C, be placed in it is air-cooled under the conditions of be cooled to temperature
For 400-500 DEG C；Wherein,
Cooldown rate in step 1) is 2.2-2.8 DEG C/s.
2. cooling means according to claim 1, it is characterised in that air-cooled in step 3) comprises at least the first cooling section
With the second cooling section, and the first cooling section is is cooled to 720-780 DEG C from 800-850 DEG C, the second cooling section is from 720-780 DEG C
It is cooled to 400-500 DEG C；Wherein,
The cooldown rate of first cooling section is 2.2-2.8 DEG C/s；
The cooldown rate of second cooling section is 1.5-2.1 DEG C/s.
3. cooling means according to claim 1 or 2, it is characterised in that jet is cooled to by multiple sprays in step 1)
Leaching ring cools down to pipe steel, and length direction of multiple ring spargers along the Guan Gang is uniform；
The spray ring surface is formed as octagon, and the length of side is 10-30cm, and the center of each edge of the ring sparger is each set
It is equipped with nozzle.
4. cooling means according to claim 3, it is characterised in that the distance between two adjacent ring spargers are 10-
30cm。
5. cooling means according to claim 3, it is characterised in that the flow of the current sprayed in each nozzle is 150-
200mL/s。
6. cooling means according to claim 1 or 2, it is characterised in that cold to be placed in the enterprising sector-style of cold bed in step 3).
7. cooling means according to claim 6, it is characterised in that adjacent when Guan Gang diameter is not less than 100mm
Formed with gap between two Guan Gang；When Guan Gang diameter is less than 100mm, adjacent two pipe steel can contact placement.
8. cooling means according to claim 7, it is characterised in that gap between two Guan Gang formed with gap
Distance is the 4/5-6/5 of pipe steel diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999591.1A CN107855368B (en) | 2017-10-24 | 2017-10-24 | Cooling method after steel rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999591.1A CN107855368B (en) | 2017-10-24 | 2017-10-24 | Cooling method after steel rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107855368A true CN107855368A (en) | 2018-03-30 |
| CN107855368B CN107855368B (en) | 2020-04-14 |
Family
ID=61696209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710999591.1A Active CN107855368B (en) | 2017-10-24 | 2017-10-24 | Cooling method after steel rolling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107855368B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971244A (en) * | 2018-09-25 | 2018-12-11 | 芜湖新兴铸管有限责任公司 | Rolled steel cooling means |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184718A (en) * | 1996-12-10 | 1998-06-17 | 鞍山钢铁集团公司 | Process for producing steel wire being used to produce tyre steel cord |
| CN102259112A (en) * | 2011-04-12 | 2011-11-30 | 首钢总公司 | Method for controlling structural homogeneity of high-carbon steel coil rod for deep drawing of steel wire |
| CN102671938A (en) * | 2012-05-08 | 2012-09-19 | 首钢总公司 | High speed production method for controlling banded structure of low carbon steel wire rod |
| CN103194580A (en) * | 2013-04-03 | 2013-07-10 | 武汉钢铁(集团)公司 | Rolling method of low-banded structure gear steel |
| CN104001741A (en) * | 2014-04-29 | 2014-08-27 | 张家港联峰钢铁研究所有限公司 | Post-rolling cooling control method for small-size high-Cr 82B wire rods |
-
2017
- 2017-10-24 CN CN201710999591.1A patent/CN107855368B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184718A (en) * | 1996-12-10 | 1998-06-17 | 鞍山钢铁集团公司 | Process for producing steel wire being used to produce tyre steel cord |
| CN102259112A (en) * | 2011-04-12 | 2011-11-30 | 首钢总公司 | Method for controlling structural homogeneity of high-carbon steel coil rod for deep drawing of steel wire |
| CN102671938A (en) * | 2012-05-08 | 2012-09-19 | 首钢总公司 | High speed production method for controlling banded structure of low carbon steel wire rod |
| CN103194580A (en) * | 2013-04-03 | 2013-07-10 | 武汉钢铁(集团)公司 | Rolling method of low-banded structure gear steel |
| CN104001741A (en) * | 2014-04-29 | 2014-08-27 | 张家港联峰钢铁研究所有限公司 | Post-rolling cooling control method for small-size high-Cr 82B wire rods |
Non-Patent Citations (1)
| Title |
|---|
| 王有铭等: "《钢材的控制轧制和控制冷却（第2版）》", 31 March 2009, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971244A (en) * | 2018-09-25 | 2018-12-11 | 芜湖新兴铸管有限责任公司 | Rolled steel cooling means |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107855368B (en) | 2020-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105925894B (en) | A kind of high-strength anti-lamellar tearing Q500D Z35 Hydropower Units steel plates of super thick and its manufacture method | |
| CN104233064B (en) | Cold rolling IF high-strength steel and the production method thereof of phosphorating of a kind of 170MPa level | |
| CN100542715C (en) | The continuous cast method of 450mm * 360mm medium carbon manganese steel bloom | |
| CN103898418B (en) | Large thickness Ni is low-temperature (low temperature) vessel steel plate and production method thereof | |
| CN102676919B (en) | Method for cooling low-alloy hot-rolled H-shaped steel with yield strength of 550MPa after rolling | |
| CN110684931B (en) | Control method for non-yield phenomenon of niobium microalloyed HRB400E hot-rolled ribbed steel bar | |
| CN102796943B (en) | Thin strip steel for thin-wall oil drum and manufacturing method of thin strip steel | |
| CN102649203B (en) | Gas shielded welding wire and coil rod, with low cost, for nuclear power containment shell | |
| CN103305758A (en) | Steel plate for low-temperature pressure container and production method of steel plate | |
| CN1952198A (en) | Trace niobium -containing steel for cooling-control reinforced bar and method for producing same | |
| CN103667878B (en) | A kind of Steel strip for thin-wall oil bucket and manufacture method thereof | |
| CN105586532A (en) | Low-alloy high-strength large-diameter thick-walled seamless steel pipe and manufacturing method thereof | |
| CN110666125B (en) | Method for eliminating warping of continuous casting billet | |
| CN113441545B (en) | HRB500E plain-speed hot-rolled ribbed steel bar with strength-to-yield ratio of more than 1.28 and production method thereof | |
| CN102825236A (en) | Method for removing transverse crack defects of continuous casting billet corner of boron steel | |
| CN107414049A (en) | The refinement control method of continuous casting steel billet corner top layer metallographic structure | |
| CN111424149A (en) | Gear steel strip-shaped structure control process | |
| CN105779724A (en) | Control method for banded structures of gear steel and gear steel | |
| CN109735699A (en) | The production method for preventing the no remarkable yield point of hot rolled ribbed bars containing niobium | |
| CN102689104A (en) | Gas shielded welding wire and wire rod for nuclear containment | |
| CN107855368A (en) | Cooling means after steel rolling | |
| CN104278195A (en) | 345MPa low-yield-tensile ratio H-shaped steel and preparation method thereof | |
| CN104388838A (en) | 5Ni steel plate for ultralow temperature pressure vessel and production method of 5Ni steel plate | |
| CN104694846B (en) | A kind of low temperature seamless steel pipe and its production method | |
| CN103146995A (en) | High manganese steel continuous casting production technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |