CN107413860A - A kind of control method of ultra-low-carbon steel iron scale - Google Patents
A kind of control method of ultra-low-carbon steel iron scale Download PDFInfo
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- CN107413860A CN107413860A CN201710489757.5A CN201710489757A CN107413860A CN 107413860 A CN107413860 A CN 107413860A CN 201710489757 A CN201710489757 A CN 201710489757A CN 107413860 A CN107413860 A CN 107413860A
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- steel
- iron scale
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- low
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- 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
- B21B37/76—Cooling control on the run-out table
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention belongs to field of metallurgy, specifically provides a kind of control method of ultra-low-carbon steel iron scale.Ensure laying temperature control in the range of 895~910 DEG C; adjust Stelmor controlled cooling line roller table speed; it is appropriate to open blower fan and insulation cover; the iron scale of this technology generation can effectively protect the matrix of steel not oxidized; be advantageous to mechanical descaling again, without Pickling Descaling, reach environmental protection; and the performance of steel is ensured, improve the purpose of consumer products quality.
Description
Technical field
The invention belongs to field of metallurgy, specifically provides a kind of control method of ultra-low-carbon steel iron scale.
Background technology
De-scaling is the process that gren rod removes scale on surface before drawing.The state of wire rod scale on surface is closed
It is that general steel surface iron scale is relevant with the carbon content of steel to follow-up de-scaling difficulty or ease, ultra-low-carbon steel is due to solute member in steel
Element is few, and specific heat is small, easily cools down, and therefore, it, which rolls principle, is：Two fast one is high, and firing rate is fast, heating-up temperature is high, rolling is fast
Degree is fast.Iron scale mainly with control it is cold relevant, control it is cold first have to consider be steel performance, next, which is only, takes into account iron scale
State.The general Ultra-low carbon steel capital is cold-forging steel or wire drawing steel, it is desirable to slow cooling, i.e., using delay chilling.Control herein under cool condition
The more difficult removal of iron scale, and there is pink red rust on wire rod surface.If using mechanical descaling, the iron scale except under is mostly powder
Last shape.The difficulty or ease that iron scale removes are also critically important, and iron scale is not easy to remove, and can bring downstream drawing procedure into, are formed
Iron scale is pressed into, or even is taken on finished product, produces waste product.Therefore, performance and iron scale state will be taken into account, and ensure wire rod
Optimize rolling and the cooling technique of wire rod on the premise of performance, improve scale structure and mechanical descaling performance, produced to improving
Quality, mechanical descaling effect is improved, process processing characteristics has great importance after improvement.
The iron scale of existing common process production wire rod is not easy to mechanical descaling due to the reason such as composition is unreasonable,
The iron scale for still having residual after de-scaling is adsorbed on wire rod surface, influences the further operation of subsequent handling.
The content of the invention
The defects of in order to overcome prior art, it is an object of the present invention to provide a kind of controlling party of ultra-low-carbon steel iron scale
Method, the temperature on the one hand started for ultra-low-carbon steel, control phase transformation, on the other hand using the cold scheme regulation cooling of stelmor control
Speed, control the composition and consistency of iron scale.
To achieve the above object, the present invention provides a kind of control method of ultra-low-carbon steel iron scale, comprises the following steps that：
1) laying temperature is：895~910 DEG C；
2) Stelmor controlled cooling line roller table speed set scheme as：The steel of Ф 5.5~8.5mm specifications, entrance velocity are
0.20m/s, maximal rate 0.40m/s, muzzle velocity 0.35m/s；The steel of Ф 9~12mm specifications, entrance velocity are
0.30m/min, maximal rate 0.50m/s；Muzzle velocity is 0.45m/s；The steel of Ф 12.5~17mm specifications, entrance velocity are
0.35m/s, maximal rate 0.50m/s, muzzle velocity 0.45m/s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~2.0 DEG C/s, 600~620 DEG C is cooled to room temperature.
The reasons why design of the present invention：According to the low characteristic of ultra-low-carbon steel specific heat, in order that steel is formed during phase transformation
The tissue of easy cold-heading, i.e., uniform larger ferrite, will be incubated to steel, should be with most slow roller speed because its radiating is very fast
Operation, wire rod is tried one's best stack up, reduce that temperature is uneven, and this kind of steel phase transition temperature is shown in attached typically between 790~870 DEG C
Shown in Fig. 1, between expansion temperature range is 750~900 DEG C, uniform Slow cooling is answered in this temperature range, is advantageous to ferrite
Fully separate out, can just make that the low intensity of steel, plasticity are good, drawing property is good, wire rod poker characteristic is good.Should be somewhat below 750 DEG C
Accelerate cooling, stabilizing tissue, less than 710 DEG C phase transformations are fully finished, hereafter can increase cooling velocity, that is, increase to wire rod surface
Oxygen-supplying amount, generate thicker finer and close iron scale, such iron scale can both protect the matrix of steel not oxidized, and have again
Beneficial to mechanical descaling.
The present invention makes austenite fully decompose using higher laying temperature, passes through the cold control of stelmor delaying type, regulation
The opening and closing situation of blower fan and insulation shroud, makes ferrite fully separate out, and its advantage is：The iron scale of this method generation was both
It can effectively protect the matrix of steel not oxidized, be advantageous to mechanical descaling again, without Pickling Descaling, reach environmental protection, improve and use
The purpose of family product quality.
Brief description of the drawings
Fig. 1 is ferrite transformation area cooling curve CCT.
Embodiment
The invention will be further elaborated by the following examples, but does not limit the present invention.It is every without departing substantially from the present invention
The change of design or equivalent substitute are included within protection scope of the present invention.
Embodiment 1：
Wire rod diameter 5.5mm
1) laying temperature is：910℃；
2) Stelmor controlled cooling line roller table speed set scheme as：Entrance velocity is 0.20m/s, maximal rate 0.40m/
s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~2.0 DEG C/s, 600 DEG C is cooled to room temperature.
Embodiment 2：
Wire rod diameter 6.5mm
1) laying temperature is：905℃；
2) Stelmor controlled cooling line roller table speed set scheme as：Entrance velocity is 0.20m/s, maximal rate 0.40m/
s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~2.0 DEG C/s, 600 DEG C is cooled to room temperature.
Embodiment 3
Wire rod diameter 8.0mm
1) laying temperature is：900℃；
2) Stelmor controlled cooling line roller table speed set scheme as：Entrance velocity is 0.20m/s, maximal rate 0.40m/
s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~2.0 DEG C/s, 600 DEG C is cooled to room temperature.
Embodiment 4
Wire rod diameter 9.0mm
1) laying temperature is：897℃；
2) Stelmor controlled cooling line roller table speed set scheme as：Entrance velocity is 0.30m/s, maximal rate 0.50m/
s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~1.5 DEG C/s, 610 DEG C is cooled to room temperature.
Embodiment 5
Wire rod diameter 17.0mm
1) laying temperature is：895℃；
2) Stelmor controlled cooling line roller table speed set scheme as：Entrance velocity is 0.35m/s, maximal rate 0.50m/
s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~1.5 DEG C/s, 620 DEG C is cooled to room temperature.
Ultra low carbon steel wire rod performance made from embodiment 1~5 and iron scale effect are shown in Table 1.
The ultra low carbon steel wire rod performance of table 1 and iron scale effect
Claims (1)
1. a kind of control method of ultra-low-carbon steel iron scale, it is characterised in that comprise the following steps：
1) laying temperature is：895~910 DEG C；
2) Stelmor controlled cooling line roller table speed set scheme as：The steel of Ф 5.5~8.5mm specifications, entrance velocity 0.20m/
S, maximal rate 0.40m/s, muzzle velocity 0.35m/s；The steel of Ф 9~12mm specifications, entrance velocity 0.30m/min,
Maximal rate is 0.50m/s；Muzzle velocity is 0.45m/s；The steel of Ф 12.5~17mm specifications, entrance velocity 0.35m/s, most
Big speed is 0.50m/s, muzzle velocity 0.45m/s；
3) blower fan opening：Last Fans standard-sized sheet, Fans second from the bottom open 30%；
4) insulation cover opening：1~2 group of closing, remaining is fully open；
5) wire rod cooling rate control collection volume after 1.0~2.0 DEG C/s, 600~620 DEG C is cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710489757.5A CN107413860A (en) | 2017-06-24 | 2017-06-24 | A kind of control method of ultra-low-carbon steel iron scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710489757.5A CN107413860A (en) | 2017-06-24 | 2017-06-24 | A kind of control method of ultra-low-carbon steel iron scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107413860A true CN107413860A (en) | 2017-12-01 |
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| CN201710489757.5A Pending CN107413860A (en) | 2017-06-24 | 2017-06-24 | A kind of control method of ultra-low-carbon steel iron scale |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111974798A (en) * | 2020-07-24 | 2020-11-24 | 柳州钢铁股份有限公司 | Method for increasing thickness of iron scale on surface of wire rod |
| CN112642859A (en) * | 2020-12-03 | 2021-04-13 | 广东韶钢松山股份有限公司 | Easy-pickling low-carbon steel wire rod and control method for surface iron scale thereof |
| CN113680813A (en) * | 2021-08-24 | 2021-11-23 | 攀钢集团研究院有限公司 | Stelmor method based high-carbon steel long material surface oxide control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514423A (en) * | 2009-03-27 | 2009-08-26 | 武汉钢铁(集团)公司 | Aluminiferous low-carbon cold heading wire rod steel and production method thereof |
| CN102601129A (en) * | 2012-03-01 | 2012-07-25 | 首钢总公司 | Controlling method for scales on surface of low-carbon cold heading steel hot-rolled wire rods |
| CN102699055A (en) * | 2012-06-15 | 2012-10-03 | 首钢总公司 | Method for improving mechanical dephosphorization of iron scale of low-carbon cold heading steel wire rod |
| CN102896159A (en) * | 2011-07-29 | 2013-01-30 | 宝钢集团新疆八一钢铁有限公司 | Rolling cooling technology for low-carbon steel wire rod oxidized iron sheet for reducing drawn wire |
| CN103785695A (en) * | 2014-01-21 | 2014-05-14 | 首钢总公司 | Controlling method for lowering yield ratio of low-carbon cold heading steel |
| CN104275366A (en) * | 2014-09-23 | 2015-01-14 | 南京钢铁股份有限公司 | Method for controlling oxide iron scale on surface of low-carbon steel hot rolled wire rod |
-
2017
- 2017-06-24 CN CN201710489757.5A patent/CN107413860A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514423A (en) * | 2009-03-27 | 2009-08-26 | 武汉钢铁(集团)公司 | Aluminiferous low-carbon cold heading wire rod steel and production method thereof |
| CN102896159A (en) * | 2011-07-29 | 2013-01-30 | 宝钢集团新疆八一钢铁有限公司 | Rolling cooling technology for low-carbon steel wire rod oxidized iron sheet for reducing drawn wire |
| CN102601129A (en) * | 2012-03-01 | 2012-07-25 | 首钢总公司 | Controlling method for scales on surface of low-carbon cold heading steel hot-rolled wire rods |
| CN102699055A (en) * | 2012-06-15 | 2012-10-03 | 首钢总公司 | Method for improving mechanical dephosphorization of iron scale of low-carbon cold heading steel wire rod |
| CN103785695A (en) * | 2014-01-21 | 2014-05-14 | 首钢总公司 | Controlling method for lowering yield ratio of low-carbon cold heading steel |
| CN104275366A (en) * | 2014-09-23 | 2015-01-14 | 南京钢铁股份有限公司 | Method for controlling oxide iron scale on surface of low-carbon steel hot rolled wire rod |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111974798A (en) * | 2020-07-24 | 2020-11-24 | 柳州钢铁股份有限公司 | Method for increasing thickness of iron scale on surface of wire rod |
| CN112642859A (en) * | 2020-12-03 | 2021-04-13 | 广东韶钢松山股份有限公司 | Easy-pickling low-carbon steel wire rod and control method for surface iron scale thereof |
| CN112642859B (en) * | 2020-12-03 | 2022-04-12 | 广东韶钢松山股份有限公司 | Easy-pickling low-carbon steel wire rod and control method for surface iron scale thereof |
| CN113680813A (en) * | 2021-08-24 | 2021-11-23 | 攀钢集团研究院有限公司 | Stelmor method based high-carbon steel long material surface oxide control method |
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Application publication date: 20171201 |