CN108176717A - A kind of hot rolled circular steel Methods of Surface Quality Control - Google Patents
A kind of hot rolled circular steel Methods of Surface Quality Control Download PDFInfo
- Publication number
- CN108176717A CN108176717A CN201711457102.6A CN201711457102A CN108176717A CN 108176717 A CN108176717 A CN 108176717A CN 201711457102 A CN201711457102 A CN 201711457102A CN 108176717 A CN108176717 A CN 108176717A
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- China
- Prior art keywords
- hot rolled
- circular steel
- rolled circular
- defect
- quality control
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Classifications
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
-
- 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
- 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
- B21B45/0269—Cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention discloses a kind of hot rolled circular steel Methods of Surface Quality Control, it includes the following steps：(a) hot rolled circular steel is immersed in the water and is cooled to 150~250 DEG C, then put it into pickling tube to carry out pickling, be dried up after being rinsed with flowing water；(b) Surface testing is carried out to step (a) treated hot rolled circular steel, determines that its circumference whether there is defect；When the hot rolled circular steel circumferential surface existing defects, suspend hot rolled circular steel production line, corresponding reproduction after adjusting rolling parameter；The defective hot rolled circular steel is isolated, slice is carried out to it and obtains defect sample；Metallographic micro test is carried out to the defect sample, confirms depth of defect and defect pattern；The surface treatment mode to the hot rolled circular steel is determined according to the depth of defect and defect pattern.It can accelerate the disposal options of abnormal round steel in this way, client's needs can be met and reduce the purpose for the cost done over again；Method is simple, easy for operation.
Description
Technical field
The present invention relates to quality control methods, and in particular to a kind of hot rolled circular steel Methods of Surface Quality Control.
Background technology
The surface quality defect of hot rolled circular steel usually scabs, surface is mingled with, be layered, bubble (convex closure), crackle, size surpass
Poor (off size, specification does not conform to) scratches (scratch, scratch, cut), misrun, the ears or side handles of a utensil, torsion, bending (elbow) etc..Due to each
The difference of the mechanism of production of a defect, the defects of having such as ears or side handles of a utensil, bending can check and easily, but lacking for crackle class
It falls into, since there is the covering of oxide skin on stocking surface, causes desk checking difficult, it is easy to missing inspection.Therefore lacking for crackle class
It falls into, the means of generally use nondestructive inspection (be such as vortexed, be infrared) are tested.
However, hot rolled circular steel life cycle of the product is long, the equipment investment of nondestructive inspection is high, substantially increases hot rolled circular steel
Production cost.And nondestructive inspection is only measuring means, the ability of On-line Control when not having rolling, often generates batch table
Planar defect.
Invention content
For above-mentioned technical deficiency, the object of the present invention is to provide a kind of hot rolled circular steel quality control on the surface sides
Method.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of hot rolled circular steel quality control on the surface side
Method, it includes the following steps：
(a) hot rolled circular steel is immersed in the water and is cooled to 150~250 DEG C, then put it into carry out pickling in pickling tube,
It is dried up after being rinsed with flowing water；
(b) Surface testing is carried out to step (a) treated hot rolled circular steel, determines that its circumference whether there is defect；Work as institute
Hot rolled circular steel circumferential surface existing defects are stated, suspend hot rolled circular steel production line, corresponding reproduction after adjusting rolling parameter；Isolation has
The hot rolled circular steel of defect carries out it slice and obtains defect sample；Metallographic micro test is carried out to the defect sample, really
Recognize depth of defect and defect pattern；The surface treatment side to the hot rolled circular steel is determined according to the depth of defect and defect pattern
Formula：When defect bottom is in 150 μm of round blunt shape and depth ＞ or when defect bottom is in sharp shape, to the hot rolled circular steel table
Face carries out grinding process.
Optimally, steam is also passed through into pickling tube to add in step (a), when carrying out pickling to the hot rolled circular steel
Heat.
Further, in step (a), the pressure of the steam is 0.3~0.5MPa, flow is 0.2~1t/h, temperature is
180~250 DEG C；Pickling time is 5~15 minutes.
Optimally, in step (b), the Surface testing is using naked eyes or less than 10 times of amplification sem observation.
Optimally, in step (b), hot rolled circular steel is partitioned to the batch of previous inspection.
The beneficial effects of the present invention are：Hot rolled circular steel Methods of Surface Quality Control of the present invention, by the way that round steel is cooled to soon
150~250 DEG C and multiply heat carry out pickling, subsequently in conjunction with the mode of Surface testing, metallographic micro test, can accelerate so different
The disposal options of Chang Yuangang can meet client's needs and reduce the purpose for the cost done over again；Method is simple, behaviour
Make easy to use.
Specific embodiment
It is described in detail below in conjunction with to the preferred embodiment of the invention：
Hot rolled circular steel Methods of Surface Quality Control of the present invention, it includes the following steps：
(a) hot rolled circular steel (firm hot rolling is completed, and temperature is at 500 DEG C or more) is immersed in the water and is cooled to 150~250 DEG C, with
After multiply heat and put it into pickling tube and to carry out pickling (pipeline in the present embodiment, may be used, steam is passed through into pickling tube
To be heated, steam is usually superheated steam or saturated vapor, temperature be about 180~250 DEG C with ensure pickle be in compared with
High temperature, to accelerate the process of pickling so that pickling time is only 5~15 minutes；The parameter of steam is preferably：Pressure 0.3~
0.5MPa, flow are 0.2~1t/h, temperature is 180~250 DEG C)；The pickle on round steel surface is rushed using running water after pickling
Wash clean is dried up with compressed air；
(b) Surface testing is carried out to step (a) treated hot rolled circular steel, determines its circumference with the presence or absence of defect (at this
In embodiment, Surface testing generally use naked eyes or 10 times and less than 10 times of amplification sem observation)；When the hot rolled circular steel circumference
Surface existing defects (primary part observation crack defect) suspend hot rolled circular steel production line, corresponding reproduction after adjusting rolling parameter；
The defective hot rolled circular steel is isolated (since hot rolled circular steel is typically that a batch detection is primary, as long as this is isolated to go out
The hot rolled circular steel of existing defect is to previous batch), slice is carried out to it and obtains defect sample；To the defect sample into
Row metallographic micro test confirms depth of defect and defect pattern；It is determined according to the depth of defect and defect pattern to the heat
Roll the surface treatment mode of round steel：When defect bottom is in 150 μm of round blunt shape and depth ＞ or when defect bottom is in sharp shape
When, the processing that the hot rolled circular steel surface strip off the skin (processing that strips off the skin be not only to the detail sanding of hot rolled circular steel fault location,
But uniform grinding is carried out to its entire circumferential surface to remove defect)；When defect bottom is in round blunt shape and depth≤150 μm, no
It is handled with to the hot rolled circular steel.Obviously disposal options can accelerate the processing of abnormal round steel in this way, can meet client's need
Will, and the purpose for the cost done over again is reduced to greatest extent；Method is simple, easy for operation.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that spirit is made, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of hot rolled circular steel Methods of Surface Quality Control, which is characterized in that it includes the following steps：
(a) hot rolled circular steel is immersed in the water and is cooled to 150~250 DEG C, then put it into and pickling is carried out in pickling tube, use flowing water
It is dried up after flushing；
(b) Surface testing is carried out to step (a) treated hot rolled circular steel, determines that its circumference whether there is defect；When the heat
Round steel circumferential surface existing defects are rolled, suspend hot rolled circular steel production line, corresponding reproduction after adjusting rolling parameter；It is isolated defective
The hot rolled circular steel, it is carried out slice obtain defect sample；Metallographic micro test is carried out to the defect sample, confirms and lacks
Fall into depth and defect pattern；The surface treatment mode to the hot rolled circular steel is determined according to the depth of defect and defect pattern：
When defect bottom is in 150 μm of round blunt shape and depth ＞ or when defect bottom is in sharp shape, to the hot rolled circular steel surface
Carry out grinding process.
2. hot rolled circular steel Methods of Surface Quality Control according to claim 1, it is characterised in that：In step (a), to described
Hot rolled circular steel carries out also being passed through steam into pickling tube during pickling to be heated.
3. hot rolled circular steel Methods of Surface Quality Control according to claim 2, it is characterised in that：In step (a), the steaming
The pressure of vapour is 0.3~0.5MPa, flow is 0.2~1t/h, temperature is 180~250 DEG C；Pickling time is 5~15 minutes.
4. hot rolled circular steel Methods of Surface Quality Control according to claim 1, it is characterised in that：In step (b), the table
Face detection is using naked eyes or less than 10 times of amplification sem observation.
5. hot rolled circular steel Methods of Surface Quality Control according to claim 1, it is characterised in that：In step (b), by hot rolling
Round steel is partitioned to the batch of previous inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711457102.6A CN108176717B (en) | 2017-12-28 | 2017-12-28 | A kind of hot rolled circular steel Methods of Surface Quality Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711457102.6A CN108176717B (en) | 2017-12-28 | 2017-12-28 | A kind of hot rolled circular steel Methods of Surface Quality Control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108176717A true CN108176717A (en) | 2018-06-19 |
| CN108176717B CN108176717B (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711457102.6A Active CN108176717B (en) | 2017-12-28 | 2017-12-28 | A kind of hot rolled circular steel Methods of Surface Quality Control |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09155427A (en) * | 1995-12-06 | 1997-06-17 | Kawasaki Steel Corp | Regenerative repairing method of rubber roll, rubber roll for carrying metal strip, and rubber roll for liquid squeezing of metal strip |
| CN1709639A (en) * | 2005-06-30 | 2005-12-21 | 宝山钢铁股份有限公司 | Hot-rolled finished product small steel rod surface ear defect removing method |
| US7434435B2 (en) * | 2003-09-04 | 2008-10-14 | Sms Demag Ag | Method and device for applying an adjustable tensile-stress distribution, in particular in the edge regions of cold-rolled metal strips |
| CN102323388A (en) * | 2011-05-18 | 2012-01-18 | 河北钢铁股份有限公司邯郸分公司 | A kind of roll bending limit portion vertical crack produces the determination methods of reason |
| CN103817493A (en) * | 2013-12-30 | 2014-05-28 | 江苏界达特异新材料股份有限公司 | Manufacturing method and manufacturing equipment for online hot rolling and rolling forming of seamless special pipes |
| CN104141097A (en) * | 2014-05-19 | 2014-11-12 | 江阴市液压油管有限公司 | Hot-rolled round bar for high-pressure oil pipe and manufacturing method |
| CN107096795A (en) * | 2017-05-23 | 2017-08-29 | 宁波钢铁有限公司 | A kind of manufacture method for reducing edge defects of hot rolled strip steel |
-
2017
- 2017-12-28 CN CN201711457102.6A patent/CN108176717B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09155427A (en) * | 1995-12-06 | 1997-06-17 | Kawasaki Steel Corp | Regenerative repairing method of rubber roll, rubber roll for carrying metal strip, and rubber roll for liquid squeezing of metal strip |
| US7434435B2 (en) * | 2003-09-04 | 2008-10-14 | Sms Demag Ag | Method and device for applying an adjustable tensile-stress distribution, in particular in the edge regions of cold-rolled metal strips |
| CN1709639A (en) * | 2005-06-30 | 2005-12-21 | 宝山钢铁股份有限公司 | Hot-rolled finished product small steel rod surface ear defect removing method |
| CN102323388A (en) * | 2011-05-18 | 2012-01-18 | 河北钢铁股份有限公司邯郸分公司 | A kind of roll bending limit portion vertical crack produces the determination methods of reason |
| CN103817493A (en) * | 2013-12-30 | 2014-05-28 | 江苏界达特异新材料股份有限公司 | Manufacturing method and manufacturing equipment for online hot rolling and rolling forming of seamless special pipes |
| CN104141097A (en) * | 2014-05-19 | 2014-11-12 | 江阴市液压油管有限公司 | Hot-rolled round bar for high-pressure oil pipe and manufacturing method |
| CN107096795A (en) * | 2017-05-23 | 2017-08-29 | 宁波钢铁有限公司 | A kind of manufacture method for reducing edge defects of hot rolled strip steel |
Non-Patent Citations (1)
| Title |
|---|
| 王新宇: "电磁纯铁圆钢表面裂纹成因分析", 《山西冶金》 * |
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| CN108176717B (en) | 2019-07-02 |
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Inventor after: Liu Rongquan Inventor after: Xu Li Inventor after: Xu Sheng Inventor after: Zhu Chunle Inventor after: Lv Jiyong Inventor after: Hu Jing Inventor after: Chen Zhenyong Inventor before: Liu Rongquan Inventor before: Xu Li Inventor before: Xu Sheng Inventor before: Zhu Chunle Inventor before: Lv Jiyong Inventor before: Hu Jing Inventor before: Chen Zhenyong |
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