CN107185969B - Medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness - Google Patents
Medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness Download PDFInfo
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- CN107185969B CN107185969B CN201710393204.XA CN201710393204A CN107185969B CN 107185969 B CN107185969 B CN 107185969B CN 201710393204 A CN201710393204 A CN 201710393204A CN 107185969 B CN107185969 B CN 107185969B
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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
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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
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a kind of medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness, including final rolling temperature control, laying temperature control, the control of Stelmor cooling line cooling rate；Mill inlet temperature controls within the scope of 830~860 DEG C, and finishing stands temperature rise controls within the scope of 30~60 DEG C；Laying temperature controls within the scope of 830~850 DEG C；It adjusts Stanermo wind-cooling linear insulation cover and opens quantity and blower open degree, control wire rod into insulation cover temperature within the scope of 700~750 DEG C, insulation cover temperature is within the scope of 630~680 DEG C out.The present invention can obtain Fe3O4Ratio is higher and the gren rod of iron scale thinner thickness, to prevent premature generation red rust in transportational process.
Description
Technical field
The present invention relates to a kind of smelting rolling techniques of steel, specifically, are related to a kind of medium carbon cold heading steel wire rod Surface Oxygen
Change iron sheet component and method for controlling thickness.
Background technique
The scale structure of hot-rolled steel has vital influence to the surface quality of steel, is to prevent corrosion of steel
Primary barrier.Iron scale is the oxide for the iron that steel surface generates under high temperature, and constituting includes FeO, Fe2O3And Fe3O4,
FeO, Fe are followed successively by from steel matrix to surface3O4And Fe2O3.The color of iron scale is with oxidation component each in iron scale
It constitutes and changes: working as Fe2O3When ratio is higher, red is shown as；When FeO is more, pewter is shown as；Fe3O4When occupying the majority,
In black.
Raising with user to hot rolling wire quality requirement, the application range of the hot rolling wire as main raw material(s) is not
It is disconnected to expand, while more stringent requirements are proposed to wire surface quality and service performance, especially to the surface matter of hot rolling wire
More demanding steel products, such as fastener cold-forging steel, welding steel, prestress wire steel are measured to hot rolling wire table
The requirement of face quality is all harsher.
Summary of the invention
Technical problem solved by the invention is to provide a kind of medium carbon cold heading steel wire rod scale on surface component and thickness
Control method can obtain Fe3O4Ratio is higher and the gren rod of iron scale thinner thickness, to prevent mistake in transportational process
Early generation red rust.
Technical solution is as follows:
A kind of medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness, including final rolling temperature control, spit
The control of silk temperature, the control of Stelmor cooling line cooling rate；Mill inlet temperature controls the finish rolling within the scope of 830~860 DEG C
Cheng Wensheng is controlled within the scope of 30~60 DEG C；Laying temperature controls within the scope of 830~850 DEG C；Adjust Stanermo wind-cooling linear
Insulation cover opens quantity and blower open degree, controls wire rod into insulation cover temperature within the scope of 700~750 DEG C, out insulation cover temperature
Degree is within the scope of 630~680 DEG C.
Further, by open the 1st~2 insulation cover, by first blower open degree control be 50%, realize wire rod into
Insulation cover temperature is within the scope of 700~750 DEG C, residence time of the control wire rod in high-temperature oxydation section；Phase change zone is moved forward, for disk
The transformation of iron scale constituent structure provides advantage after phase transformation, closes 3~20 insulation covers, closes 2~10
Frame blower, control roller table speed control wire rod and go out insulation cover temperature within the scope of 630~680 DEG C in 0.1~0.5m/s.
Further, the effect of control stelmor cooling technique is the thickness for controlling iron scale, by medium carbon steel Surface Oxygen
Change the thickness control of iron sheet at 9~15 μm.
Further, Stelmor cooling line roller table speed is 0.1~0.5m/s, extend the oxidation of wire rod scale on surface
Time, to control gren rod iron scale constituent and thickness.
Compared with prior art, the technology of the present invention effect includes:
The thickness and ingredient that iron scale can be controlled using the present invention, can obtain Fe3O4Ratio is higher and iron scale
The gren rod of thinner thickness, to prevent premature generation red rust in transportational process.
Detailed description of the invention
Fig. 1 is medium carbon cold heading steel SWRCH35K gren rod control front and back X-ray diffraction component analysis figure in the present invention.
Specific embodiment
It elaborates below with reference to example embodiment to technical solution of the present invention.However, example embodiment can
Implement in a variety of forms, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by the present invention.
The present invention passes through the component and thickness control of centering carbon the cold heading steel scale on surface, can obtain Fe3O4Than
Higher and iron scale thinner thickness the gren rod of example, to prevent premature generation red rust in transportational process.
The purpose of the present invention is to provide a kind of medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness,
Obtain Fe3O4The higher iron scale of content ratio, to prevent premature generation red rust in transportational process.The present invention is deeply
Analysis medium carbon cold heading steel wire rod iron scale oxide is formed on the basis of rule, to each technique of gren rod controlled rolling and controlled cooling process
Link proposes the technological parameter of quantified controlling, optimizes current wire rod operation area medium carbon steel the cold heading steel production technology.
Medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness, specifically includes the following steps: finish rolling temperature
Degree control, laying temperature control, the control of Stelmor cooling line cooling rate, the technical parameter specifically controlled are as follows: finishing mill entrance temperature
Within the scope of 830~860 DEG C, finishing stands temperature rise is controlled within the scope of 30~60 DEG C for degree control；Laying temperature control 830~
Within the scope of 850 DEG C；It adjusts Stanermo wind-cooling linear insulation cover and opens quantity and blower open degree, control wire rod into insulation cover temperature
Within the scope of 700~750 DEG C, insulation cover temperature is within the scope of 630~680 DEG C out.
The purpose of control final rolling temperature is control scale structure and overall thickness.Connected according to medium carbon cold heading steel air atmosphere
Continuous oxidation behavior curve, avoids the quick oxidation section of iron scale, lower final rolling temperature can make medium carbon steel wire rod Surface Oxygen
It is relatively thin to change thickness of scale, and FeO content is lower in control iron scale constituent, Fe3O4Content is higher, in transportational process
Iron scale is not easily to fall off, can play a protective role to wire rod surface, prevent wire rod surface generate red rust, reduce user at
This.The purpose of laying temperature control is control scale structure and overall thickness, the iron scale that lower laying temperature generates
Thinner thickness, but wire rod surface is easy to appear red rust, influences wire rod appearance.The iron oxide skin depth that higher laying temperature generates
Degree is thicker, and the FeO layer of wire rod internal layer is thicker, is easy to appear the defects of layering is bubbled, is easy to fall off in transportational process, to wire rod table
Face does not have protective effect.
It is 50% by the control of first blower open degree by opening the 1st~2 insulation cover, realizes wire rod into insulation cover
Temperature is within the scope of 700~750 DEG C, residence time of the control wire rod in high-temperature oxydation section.Phase change zone is moved forward, is wire rod phase transformation
After iron scale constituent structure transformation provide advantage, close 3~20 insulation covers, close 2~10 frame blowers,
Roller table speed is controlled in 0.1~0.5m/s, wire rod is controlled and goes out insulation cover temperature within the scope of 630~680 DEG C.
In the present invention, the chemical component group of medium carbon cold heading steel becomes C%:0.32~0.36, Si%:0.10~0.15,
Mn%:0.45~0.50, B%:0.002~0.0035, and including trace alloying elements such as a small amount of Cr, Ni, Cu.
In the present invention, control laying temperature and stelmor cooling technique are keys, and control laying temperature mainly adjusts
The constituent for optimizing iron scale is controlled laying temperature in 830~850 DEG C of models by adjusting 5# water volume in water tank after finish rolling
In enclosing, make Fe in iron scale3O4Content is higher.Controlling stelmor cooling technique is mainly the thickness for controlling iron scale, weight
Point is to control the temperature into insulation cover within the scope of 700~750 DEG C, while controlling slower roller table speed, finally by middle carbon
The thickness control of steel surface iron scale is at 9~15 μm.
Embodiment 1
The present invention is applied in Baogang Chang Cai factory 150mm2 production φ 10mm SWRCH35K gren rod, is spun
Temperature is reduced to 830~850 DEG C by original 930~950 DEG C, reduces the oxidizing temperature of wire rod scale on surface, drop
Low Stelmor cooling line roller table speed is 0.1~0.5m/s, extends the oxidization time of wire rod scale on surface, to control
Gren rod iron scale constituent and thickness.It is as shown in table 1 to control process program.
The cold process program of carbon SWRCH35K gren rod control in table 1
| Process program | Laying temperature/DEG C | Blower open degree | Into insulation cover temperature/DEG C | Out insulation cover temperature/DEG C |
| Before technique | 930 | Quan Guan | 890 | 690 |
| After technique | 830 | 1 frame blower 50% | 730 | 650 |
As shown in Figure 1, for medium carbon cold heading steel SWRCH35K gren rod control front and back X-ray diffraction component point in the present invention
Analysis figure.
Table 2 show SWRCH35K control technique before and after thickness and constituent ratio, by laying temperature and control it is cold
The adjustment of technique, finally obtains the iron scale of SWRCH35K gren rod with a thickness of 9 μm, Fe in iron scale3O4Content ratio
It is 73%.
Carbon SWRCH35K hot rolling rod bundle surface iron scale thickness and constituent ratio in table 2
| Process program | Oxidated layer thickness/μm | Iron scale constituent ratio |
| Before technique | 34 | Fe3O441%, FeO 48%, Fe2O311% |
| After technique | 9 | Fe3O473%, FeO 22%, Fe2O319% |
Term used herein is explanation and term exemplary, and not restrictive.Since the present invention can be with a variety of
Form be embodied without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to it is any above-mentioned
Details, and should widely explaining within the spirit and scope of the appended claims, thus fall into claim or its etc.
Whole change and modification in effect range all should be appended claims and be covered.
Claims (1)
1. a kind of medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness, it is characterised in that: including finish rolling temperature
Degree control, laying temperature control, the control of Stelmor cooling line cooling rate；Mill inlet temperature is controlled in 830~860 DEG C of ranges
Interior, finishing stands temperature rise controls within the scope of 30~60 DEG C；Laying temperature controls within the scope of 830~850 DEG C；By opening the
The control of first blower open degree is 50% by 1~2 insulation cover, is adjusted Stanermo wind-cooling linear insulation cover and is opened quantity and wind
Machine open degree controls gren rod into insulation cover temperature within the scope of 700~750 DEG C, and control gren rod is in high-temperature oxydation section
Residence time；Phase change zone is moved forward, is hot rolling rod bundle surface iron scale constituent structure after gren rod phase transformation
Transformation provides advantage, closes 3~20 insulation covers, closes 2~10 frame blowers, control roller table speed in 0.1~0.5m/s,
Gren rod goes out insulation cover temperature within the scope of 630~680 DEG C；The effect of control stelmor cooling technique is control hot rolling disk
The thickness of scale on surface, by the thickness control of medium carbon cold heading steel hot rolling rod bundle surface iron scale at 9~15 μm；This is too
You rub cooling line roller table speed as 0.1~0.5m/s, extend the oxidization time of hot rolling rod bundle surface iron scale, to control
The constituent and thickness of gren rod iron scale.
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| CN201710393204.XA CN107185969B (en) | 2017-05-27 | 2017-05-27 | Medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness |
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| CN201710393204.XA CN107185969B (en) | 2017-05-27 | 2017-05-27 | Medium carbon cold heading steel wire rod scale on surface component and method for controlling thickness |
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| CN107185969B true CN107185969B (en) | 2019-10-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109112428A (en) * | 2018-09-30 | 2019-01-01 | 唐山市德龙钢铁有限公司 | A kind of production method of low thickness oxide skin steel wire for welding |
| CN111872113B (en) * | 2020-06-09 | 2022-07-22 | 江苏省沙钢钢铁研究院有限公司 | Medium-high carbon steel hot-rolled wire rod and production method thereof |
| CN111804881B (en) * | 2020-07-10 | 2022-04-19 | 南京钢铁股份有限公司 | Smelting method for reducing iron oxide scale on surface of casting blank |
| CN112845633A (en) * | 2021-02-01 | 2021-05-28 | 新疆八一钢铁股份有限公司 | Mechanical stripping method for iron scale on surface of steel for wire making |
| CN113680814B (en) * | 2021-08-24 | 2023-04-07 | 攀钢集团研究院有限公司 | Method for controlling iron scale on surface of medium-carbon low-alloy wire |
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|---|---|---|---|---|
| SE446882B (en) * | 1980-05-22 | 1986-10-13 | Ssab Svenskt Stal Ab Division | Method for production of non-alloy and low-alloy steel with carbon levels not exceeding .30 weight percent and containing 0.05 to 0.20 weight percent silicon |
| JPH0860246A (en) * | 1994-08-23 | 1996-03-05 | Sumitomo Metal Ind Ltd | Production of magnetic shield material |
| CN102266868A (en) * | 2011-08-05 | 2011-12-07 | 河北钢铁股份有限公司邯郸分公司 | Production method for pickling steel with reduced acid |
| CN102560253A (en) * | 2012-03-13 | 2012-07-11 | 南京钢铁股份有限公司 | Manufacturing method of high-quality cold heading steel with uniform structure property |
| 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 |
| CN103805847A (en) * | 2014-03-07 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Optical round wire rod reinforcement bar for producing prestressed concrete steel rod and processing method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SE446882B (en) * | 1980-05-22 | 1986-10-13 | Ssab Svenskt Stal Ab Division | Method for production of non-alloy and low-alloy steel with carbon levels not exceeding .30 weight percent and containing 0.05 to 0.20 weight percent silicon |
| JPH0860246A (en) * | 1994-08-23 | 1996-03-05 | Sumitomo Metal Ind Ltd | Production of magnetic shield material |
| CN102266868A (en) * | 2011-08-05 | 2011-12-07 | 河北钢铁股份有限公司邯郸分公司 | Production method for pickling steel with reduced acid |
| 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 |
| CN102560253A (en) * | 2012-03-13 | 2012-07-11 | 南京钢铁股份有限公司 | Manufacturing method of high-quality cold heading steel with uniform structure property |
| CN103805847A (en) * | 2014-03-07 | 2014-05-21 | 武钢集团昆明钢铁股份有限公司 | Optical round wire rod reinforcement bar for producing prestressed concrete steel rod and processing method |
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