CN106391699A - Control method for oxide scales of hot-rolled tire cord steel wire rod - Google Patents
Control method for oxide scales of hot-rolled tire cord steel wire rod Download PDFInfo
- Publication number
- CN106391699A CN106391699A CN201610974216.7A CN201610974216A CN106391699A CN 106391699 A CN106391699 A CN 106391699A CN 201610974216 A CN201610974216 A CN 201610974216A CN 106391699 A CN106391699 A CN 106391699A
- Authority
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- China
- Prior art keywords
- wire rod
- tire cord
- section
- scale
- iron scale
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- 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
-
- 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
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
-
- 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
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
-
- 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
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B2045/0212—Cooling devices, e.g. using gaseous coolants using gaseous coolants
Abstract
The invention discloses a control method for oxide scales of a hot-rolled tire cord steel wire rod. The control method is used for controlling oxide scales on the surface of a wiredrawing type tire cord steel hot rolled wire rod through adopting a mechanical descaling method. The method comprises the steps that the method is applicable to tire cord carbon steel of which the percentage composition is 0.7 to 0.86%; the composition and thickness of the oxide scales on the surface of the tire cord carbon steel hot rolled wire rod are controlled through controlling the spinning temperature and a stelmor cooling technology; and the water volume of a water tank after finish rolling is adjusted, the spinning temperature is guaranteed to be in the temperature range of 850 to 870 DEG C, the problem that Fe2O3 red rust forms on the surface of the wire rod due to the fact that the spinning temperature is too low is avoided, and the problem that the proportion of Fe3O4 in the oxide scales on the surface of the wire rod is increased due to the fact that the spinning temperature is too high is avoided. According to the control method, Fe2O3 red rust on the surface of the tire cord steel hot-rolled wire rod is eliminated through controlling the spinning temperature and the stelmor cooling technology, the proportion of FeO in the wire rod is increased, the final thickness of the oxide scales of the tire cord steel hot-rolled wire rod is 5 to 20<mu>m, and the tire cord steel wire rod has a good mechanical descaling effect.
Description
Technical field
The present invention relates to a kind of surface control process of the cold drawn silk material of hot rolling, specifically a kind of solve hot rolling cord steel
Wire rod scale on surface structure and thickness, improve the hot rolling Wire Rod Steel for Curtain String Purpose iron scale controlling party of downstream drawing crudy
Method.
Background technology
Hot rolling Wire Rod Steel for Curtain String Purpose is the basic material of processing and manufacturing tyre equatorial, typically pulls to Φ from Φ 5.5mm
Between 0.2-0.3mm, more advanced material and technology can be worked into Φ below 0.2 with drawing, and very big drawing deformation amount is not only
Raw material is required to have good core structure, harsher to the surface quality requirements of Wire Rod Steel for Curtain String Purpose.The thickness of iron scale
Directly affect wire rod mechanical descaling effect with structure, if remove totally follow-up drawing surface and plate surface are not had larger
Impact.
So the control of scale structure to Wire Rod Steel for Curtain String Purpose and thickness, it is an up the mechanical dephosphorization effect of Downstream processing
Fruit ensures that product quality has the tackling key problem meaning of reality.
Content of the invention
There is residual for wire drawing class high-carbon cord wire rod iron scale mechanical descaling, it is an object of the invention to provide
A kind of hot rolling Wire Rod Steel for Curtain String Purpose iron scale control method, for optimizing the composition of hot rolling Wire Rod Steel for Curtain String Purpose scale on surface
(ratio of FeO, Fe3O4 and Fe2O3), and control the thickness of its iron scale at 5～20 μm, in order in mechanical descaling operation
Middle elimination.
The purpose of the present invention is achieved through the following technical solutions：
A kind of hot rolling Wire Rod Steel for Curtain String Purpose iron scale control method it is characterised in that：The method is passed through to control laying temperature
To control composition and the thickness of wire rod scale on surface with stelmor cooling technological process；Comprise the following steps：
1) it is applied to C%：0.7～0.85% high-carbon steel；
2) after adjusting finish to gauge, the water-cooled line water yield makes laying temperature ensure at 850～870 DEG C, it is to avoid laying temperature is too low or mistake
High and make that red rust in scale on surface or Fe3O4 ratio raises；
3) 1#, 2# blower fan is carried out with 1.5 times of dilatation, improves the cooling capacity after spinning, reduce and coil at 700-900 DEG C
The interval time of staying；
4) adjust every section of raceway speed increasing ratio of air-cooled raceway:Wherein, 1 section 105%, 2 section 105%, 3 section 105%, 4 sections
105%th, 5 sections -16 sections 110%；
5) after finish to gauge, the range of accommodation of the water-cooled line water yield is 400～1000L/min, and laying temperature is adjusted 850～870
DEG C temperature range；Laying temperature is too low, has red rust Fe2O3 and produces, laying temperature is too high, then in iron scale in iron scale
Fe3O4 layer proportion raises；Laying temperature should be controlled it is ensured that FeO in finished product wire rod scale on surface：Fe3O4=3:1；
6) insulation shroud standard-sized sheet, widens circle circle remote by raceway speedup with falling section control, allows the dispersion of wire rod cool down effect
Fruit is more preferable, thus reducing the formation thickness of iron scale.
Step 2) in, after finish to gauge, the range of accommodation of the water-cooled line water yield is 400～1000L/min it is ensured that laying temperature is 850
～870 DEG C of temperature ranges, control FeO layer in iron scale that the time of eutectoid reaction occurs, it is to avoid Fe3O4 layer is blocked up.
The present invention be applicable for use with mechanical descaling mode wire drawing class mild steel hot rolling rod bundle surface iron scale constitute with
The control of thickness.
It controls laying temperature as follows with the committed step of stelmor cooling technique：
1. optimize the composition of iron scale
After finish to gauge, the range of accommodation of the water-cooled line water yield is 400～1000L/min, and laying temperature is adjusted at 850～870 DEG C
Temperature range.Laying temperature is too low, has red rust Fe2O3 and produces, laying temperature is too high, then in iron scale in iron scale
Fe3O4 layer proportion raises.Laying temperature should be controlled it is ensured that FeO in finished product wire rod scale on surface：Fe3O4=3:1.
2. control iron scale thickness
Insulation shroud standard-sized sheet, by raceway speedup with fall section and control and widen circle circle remote, allows the dispersion cooling effect of wire rod
More preferably, thus reducing the formation thickness of iron scale.
The scale structure of gren rod divides three layers：Internal layer is loose FeO layer, and intermediate layer is that black is fine and close
Fe3O4, outermost layer is red column crystallization Fe2O3.In three layers of thing phase constitution of iron scale, the easy pickling of FeO layer, Fe3O4
Layer compactness is strong, has corrosion-resistant effect, but is difficult pickling, and Fe2O3 layer is red scale.Require during production to avoid Fe2O3
Produce, so, the main component of iron scale is Fe3O4 and FeO, be unfavorable for when Fe3O4 accounts for large percentage mechanical descaling and
Pickling.The iron scale of finished surface residual is to produce during finish to gauge, stelmor control cooling and air cooling collection volume.
The present invention mainly controls hot rolling Wire Rod Steel for Curtain String Purpose surface oxidation by controlling laying temperature and stelmor Controlled cooling process
The composition of iron sheet and thickness.
The beneficial effects of the present invention is：
1. optimize the composition of Wire Rod Steel for Curtain String Purpose scale on surface；
2. by the THICKNESS CONTROL of Wire Rod Steel for Curtain String Purpose scale on surface below 20 μm；
3. it is easy to the production that client carries out mechanical descaling and subsequent handling to wire rod.
Specific embodiment
Embodiment 1
A kind of hot rolling Wire Rod Steel for Curtain String Purpose iron scale control method, by controlling laying temperature and stelmor cooling technique
Flow process is controlling composition and the thickness of wire rod scale on surface；It is applied to C%：0.7～0.85% high-carbon steel；
3-1#, 3-2# water tank front portion after RSM unit respectively installs 1 group of positive nozzle additional, improves cooling capacity and uniformity,
Carry out cooling and obtain suitable laying temperature；Stanermo wind-cooling linear passes through roller table speed regulation space out, and bottom is toward enterprising simultaneously
Row blowing.
It is the process program of cord steel hot rolling rod bundle surface iron scale control technology in embodiment 1 as shown in table 1.Spinning
Temperature is reduced to 865 DEG C by original 910 DEG C, reduces the oxidizing temperature of wire rod scale on surface；Raceway speed and cover
Lid unlatching situation is constant, and water tank opens situation also with being shown in Table 1, and above test is by shortening wire rod surface with low laying temperature
The oxidization time of iron scale, thus reduce the thickness of ferrum oxide.
Table 2 is that embodiment 1 controls technique and former technique scale structure contrast table.The ferrum oxide leather block of this control technique
In structure, no red rust Fe2O3 produces, and FeO：Fe3O4≈3:1, iron scale gross thickness has reached 8-15 μm, composition with thick
Degree all reaches perfect condition, is easy to client and carries out mechanical descaling.
Table 1
| Process program | Laying temperature | Cover lid is opened | Situation opened by water tank |
| Former technique | 910℃ | Standard-sized sheet | House steward：100%；3-1:75%；3-2:90% |
| Control technique | 865℃ | Standard-sized sheet | House steward：100%；3-1:80%；3-2:80% |
Table 2
Comparative example 2
It is the process program of cord steel hot rolling rod bundle surface iron scale control technology in embodiment 2 as shown in table 3.Spinning
Temperature has brought up to 930 DEG C by original 910 DEG C, improves the oxidizing temperature of wire rod scale on surface；Raceway speed and cover
Lid unlatching situation is constant, and water tank opens situation also with being shown in Table 3, and above test is by improve wire rod surface with high laying temperature
The oxidization time of iron scale, carrys out experimental observation iron scale situation with this.
Table 4 is that embodiment 2 controls technique and former technique scale structure contrast table.The ferrum oxide leather block of this control technique
Less, single thickness has obvious increase for structure change, and wire rod macro surface can be shown in obvious bubble, endangered the surface matter of wire rod
Amount.It is unfavorable for the mechanical treatment of downstream client, or even have serious impact to finished surface quality.
Table 3
| Process program | Laying temperature | Cover lid is opened | Situation opened by water tank |
| Former technique | 910℃ | Standard-sized sheet | House steward：100%；3-1:75%；3-2:90% |
| Control technique | 930℃ | Standard-sized sheet | House steward：100%；3-1:80%；3-2:80% |
Table 4
Comparative example 3
It is the process program of cord steel hot rolling rod bundle surface iron scale control technology in embodiment 3 as shown in table 5.Spinning
Temperature and raceway speed and cover lid unlatching situation are constant, change the unlatching situation of 3# water tank, allow water-cooled inequality to strengthen.Above examination
Test and observe the impact to iron scale by ensureing the uneven water-cooled of identical technological parameter.
Table 6 is that embodiment 3 controls technique and former technique scale structure contrast table.The iron scale of this control technique
Fe2O3 growing amount is more, and the Fe3O4 of densification does not generate substantially, and this will result in wire rod surface more red rust, is drawing
Pull out the problems such as remain with iron scale of causing in the course of processing directly to skid.
Table 5
| Process program | Laying temperature | Cover lid is opened | Situation opened by water tank |
| Former technique | 910℃ | Standard-sized sheet | House steward：100%；3-1:75%；3-2:90% |
| Control technique | 910℃ | Standard-sized sheet | House steward：100%；3-1:60%；3-2:95% |
Table 6
Claims (2)
1. a kind of hot rolling Wire Rod Steel for Curtain String Purpose iron scale control method it is characterised in that：The method pass through control laying temperature and
Stelmor cooling technological process is controlling composition and the thickness of wire rod scale on surface；Comprise the following steps：
1）It is applied to C%：0.7 ~ 0.85% high-carbon cord steel；
2）Adjust finish to gauge after the water-cooled line water yield so that laying temperature is ensured at 850 ~ 870 DEG C, it is to avoid laying temperature too low or too high and
Make scale on surface that red rust or the rising of Fe3O4 ratio occur；
3）1#, 2# blower fan is carried out with 1.5 times of dilatation, improves the cooling capacity after spinning, reduce and coil in 700-900 DEG C of interval
The time of staying；
4）Adjust every section of raceway speed increasing ratio of air-cooled raceway:Wherein, 1 section 105%, 2 section 105%, 3 section 105%, 4 section 105%, 5
- 16 section 110% of section；
5）After finish to gauge, the range of accommodation of the water-cooled line water yield is 600 ~ 1000L/min, and laying temperature is adjusted in 850 ~ 870 DEG C of temperature
Interval；Laying temperature is too low, has red rust Fe2O3 and produces, laying temperature is too high, then Fe3O4 in iron scale in iron scale
Layer proportion raises；Laying temperature should be controlled it is ensured that FeO in finished product wire rod scale on surface：Fe3O4=3:1；
6）Insulation shroud standard-sized sheet, by raceway speedup and fall section control widen circle circle remote, allow wire rod dispersion cooling effect more
Good, thus reducing the formation thickness of iron scale.
2. hot rolling Wire Rod Steel for Curtain String Purpose iron scale control method according to claim 1 it is characterised in that：Water-cooled after finish to gauge
The range of accommodation of the line water yield is 600 ~ 1000L/min it is ensured that laying temperature is in 850 ~ 870 DEG C of temperature ranges, control iron scale
There is the time of eutectoid reaction in middle FeO layer, it is to avoid Fe3O4 layer is blocked up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610974216.7A CN106391699A (en) | 2016-11-07 | 2016-11-07 | Control method for oxide scales of hot-rolled tire cord steel wire rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610974216.7A CN106391699A (en) | 2016-11-07 | 2016-11-07 | Control method for oxide scales of hot-rolled tire cord steel wire rod |
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| CN106391699A true CN106391699A (en) | 2017-02-15 |
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| CN201610974216.7A Pending CN106391699A (en) | 2016-11-07 | 2016-11-07 | Control method for oxide scales of hot-rolled tire cord steel wire rod |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695095A (en) * | 2017-11-12 | 2018-02-16 | 湖南华菱湘潭钢铁有限公司 | The production method of environment-friendly type high-carbon wire rod iron scale |
| CN111500934A (en) * | 2020-06-09 | 2020-08-07 | 首钢集团有限公司 | Fe in high-carbon steel scale3O4Content control method |
| 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 |
| CN113680814A (en) * | 2021-08-24 | 2021-11-23 | 攀钢集团研究院有限公司 | Method for controlling iron scale on surface of medium-carbon low-alloy wire |
| CN114959504A (en) * | 2022-07-12 | 2022-08-30 | 鞍钢股份有限公司 | Acid-washing-free cord steel wire rod and production method thereof |
| CN116984388A (en) * | 2023-09-25 | 2023-11-03 | 江苏永钢集团有限公司 | Novel cooling control process for reducing cord steel wire rod iron scale |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695095A (en) * | 2017-11-12 | 2018-02-16 | 湖南华菱湘潭钢铁有限公司 | The production method of environment-friendly type high-carbon wire rod iron scale |
| CN111500934A (en) * | 2020-06-09 | 2020-08-07 | 首钢集团有限公司 | Fe in high-carbon steel scale3O4Content control method |
| CN111500934B (en) * | 2020-06-09 | 2021-09-21 | 首钢集团有限公司 | Fe in high-carbon steel scale3O4Content control method |
| 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 |
| CN113680814A (en) * | 2021-08-24 | 2021-11-23 | 攀钢集团研究院有限公司 | Method for controlling iron scale on surface of medium-carbon low-alloy wire |
| CN114959504A (en) * | 2022-07-12 | 2022-08-30 | 鞍钢股份有限公司 | Acid-washing-free cord steel wire rod and production method thereof |
| CN114959504B (en) * | 2022-07-12 | 2023-10-20 | 鞍钢股份有限公司 | Acid-washing-free cord steel wire rod and production method thereof |
| CN116984388A (en) * | 2023-09-25 | 2023-11-03 | 江苏永钢集团有限公司 | Novel cooling control process for reducing cord steel wire rod iron scale |
| CN116984388B (en) * | 2023-09-25 | 2023-12-01 | 江苏永钢集团有限公司 | Novel cooling control process for reducing cord steel wire rod iron scale |
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