CN106670411A - Surface treatment method and casting roll manufactured by the same - Google Patents
Surface treatment method and casting roll manufactured by the same Download PDFInfo
- Publication number
- CN106670411A CN106670411A CN201610985525.4A CN201610985525A CN106670411A CN 106670411 A CN106670411 A CN 106670411A CN 201610985525 A CN201610985525 A CN 201610985525A CN 106670411 A CN106670411 A CN 106670411A
- Authority
- CN
- China
- Prior art keywords
- relief pattern
- casting roller
- casting
- treatment method
- surface treatment
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0651—Casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
- B22D11/0625—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels the two casting wheels being immersed in a molten metal bath and drawing out upwardly the casting strip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
Abstract
The invention relates to a surface treatment method capable of preventing a surface defect by improving a surface shape determining surface roughness of a casting roll and a casting roll manufactured by the surface treatment method. The method includes a concave-convex pattern forming operation of forming a concave-convex pattern on a surface of the casting roll; and an electrolytic polishing operation of electrolytically polishing so that a plurality of convex portions and concave portions of the concave-convex pattern formed in the concave-convex pattern forming operation are treated to be rounded.
Description
Technical field
The present invention relates to the surface treatment method of the Casting Roller being used in double roller thin plate casting process and by the method produce
Casting Roller.
Background technology
Generally, casting technique is to solidify motlten metal to produce the process of the slab with uniform thickness.Recently,
Thin plate foundry engieering is developed and has used, wherein be directly frozen into have by motlten metal by using two Casting Rollers being close to most
The thin plate of finished product thickness.
As depicted in figs. 1 and 2, double roller thin sheet continuous casting machine 1 passes through between a pair of the Casting Rollers 10 for rotating in mutually opposite directions
Nozzle 20 provides molten steel M, and molten steel M is cooled to form foundry goods Y along Casting Roller 10, pressure rolling is subsequently carried out in roll gap with
Form thin plate S.
Edge guard 25 is arranged on the two ends of a pair of Casting Rollers 10, to prevent molten steel M from flowing out towards the two ends of Casting Roller 10.
Generally, in Casting Roller 10, cooling duct that coolant circulates wherein is formed with to cool down molten steel M, and institute
State cooling duct to be formed by the material with excellent heat-transfer character such as copper.
Additionally, formed that on the surface of Casting Roller 10 coating for improving wearability is formed using materials such as nickel.
In the coating, using such as shot-peening method formed No yield point roughness, to be smoothly discharged out casting process in produce gas
Bubble etc., and by preventing crack defect etc. from improving coagulating property.
As shown in Figures 3 to 5, the foundry goods Y through Casting Roller 10 is carried out by the roll 30 that temperature is 1100 DEG C -1200 DEG C
Hot rolling, carries out depressing Rolling Production thin plate S with the reduction ratio of 20%-40%.
In Casting Roller 10, due to being rolled during production thin plate S, its surface roughness is good, and by
In recrystallizing, its physical property is good.
For example, Casting Roller 10 includes casting roller main body 12, and is formed on the surface of casting roller main body 12 with coarse
Spend the surface treating part of the relief pattern 14 for 10 μm -20 μm.By the surface treating part of Casting Roller 10, with corresponding
Such as roughness is that the relief pattern 14' of 10 μm -20 μm of surface roughness is formed on foundry goods Y.Due to by roll 30
While pressure rolling is carried out to relief pattern 14', the roughness of relief pattern 14' formed on foundry goods Y is reduced to about 1 μm
Level.
However, in the foundry goods Y according to correlation technique, the convex portion of relief pattern 14' can be with 30 ° or bigger of angle (α)
With the recess connection being adjacent.Therefore, during foundry goods Y is rolled by roll 30 and forms thin plate S, such as oxide skin
Deng foreign body be likely to be present between the convex portion of relief pattern 14', accordingly, it is possible to wherein comprising producing thin in the state of foreign body
Plate S.
As shown in Fig. 6 A- Fig. 6 D, as described above, the defect caused by the foreign body P formed on the surface of thin plate S is referred to as
Hook-shaped defect H.Hook-shaped defect H may be retained in subsequent annealing and pickling-cold-rolled process, and may be through final cold rolling
Remain as surface defect after operation.Therefore, this hook-shaped defect H can cause the value of product to reduce.
In the Casting Roller 10 of correlation technique, according to the change of the relief pattern 14 of the surface roughness for determining surface treating part
Change, size, shape etc., foreign body is simply plugged in surface treating part.Accordingly, it would be desirable to be developed for improving the skill of surface configuration
Art is inserted in the surface treating part of Casting Roller 10 so as not to allow foreign body.
The content of the invention
Technical problem
An aspect of this disclosure is provided can prevent table by improving the surface configuration for determining casting roll surface roughness
The surface treatment method of planar defect, and the Casting Roller produced by the method.
Technical scheme
According to an aspect of this disclosure, surface treatment method may include：Relief pattern is formed on the surface of Casting Roller
Relief pattern shaping operation；And by the operation of the electrobrightening of electrobrightening, will in relief pattern shaping operation shape
Into relief pattern multiple convex portions and multiple recesses process it is circular.
In relief pattern shaping operation, it is possible to use bead method is surface-treated to the surface of Casting Roller.
In the bead method of relief pattern shaping operation, when being surface-treated to Casting Roller, can project
(project) diameter is at least the shot-peening ball of 2.8mm.
According to another aspect of the present disclosure, Casting Roller includes：Casting roller main body；And surface treating part, it is in the casting
Formed on the surface of roll body, and be shaped so that multiple convex portions of relief pattern and many by above-mentioned surface treatment method
Individual recess processes circular.
The convex portion of relief pattern can be connected with the angle smoothing less than 30 ° with the recess of the relief pattern being adjacent
Connect.
Casting Roller may further include the coating formed on the surface of casting roller main body.
Beneficial effect
According to the exemplary of the disclosure, the convex portion of the surface roughness for determining surface treating part can be improved
Shape, with the phenomenon for preventing foreign body from inserting.Therefore, it can reduce hook-shaped defect H occurred on the surface of cold-rolled products etc., from
And improve product quality.
Description of the drawings
Fig. 1 is the schematic diagram for illustrating double roller thin sheet continuous casting machine.
Fig. 2 is the perspective view of the Casting Roller for illustrating correlation technique.
Fig. 3 is the sectional view of the process that the foundry goods of casting is pressed into thin plate by the Casting Roller of correlation technique for explanation.
Fig. 4 is the sectional view intercepted along the I-I' lines of Fig. 3.
Fig. 5 is the sectional view intercepted along the II-II' lines of Fig. 3.
Fig. 6 A are the figures of the hook-shaped defect for illustrating to be formed on the surface of thin plate, and Fig. 6 B are the cross sections for illustrating hook-shaped defect
Figure, Fig. 6 C are the figures of the relief pattern of the thin sheet surface for illustrating hook-shaped defect occur, and Fig. 6 D are the bump maps for illustrating Casting Roller
The curve chart of the height/width of case.
Fig. 7 is the perspective view of the Casting Roller for illustrating exemplary.
Fig. 8 is the sectional view of the production method of the Casting Roller for illustrating exemplary.
Fig. 9 is the section of the process for illustrating that the foundry goods of casting is compressed to thin plate by the Casting Roller of exemplary
Figure.
Figure 10 is the sectional view intercepted along the III-III' lines of Fig. 9.
Figure 11 is the sectional view intercepted along the IV-IV' lines of Fig. 9.
Specific embodiment
Hereinafter, will be described in detail with reference to the accompanying drawings the exemplary of the disclosure.The exemplary enforcement of the disclosure
Scheme can be revised as various other forms, and the scope of the present disclosure is not limited to exemplary described below.For
Description it is clear for the sake of, can amplify the shape of element, size etc. in accompanying drawing, and in the accompanying drawings by identical reference
The element of expression is identical.
Fig. 7 is the perspective view of the Casting Roller for illustrating exemplary, and Fig. 8 is the casting for illustrating exemplary
The sectional view of the production method of roller, Fig. 9 is to illustrate that the foundry goods of casting is compressed to into thin plate by the Casting Roller of exemplary
Process sectional view.In addition, Figure 10 is the sectional view intercepted along the III-III' lines of Fig. 9, Figure 11 is the IV-IV' lines along Fig. 9
The sectional view of intercepting.
With reference to Fig. 7 to Figure 11, the surface treatment method of exemplary includes relief pattern shaping operation and electrolysis
Polishing operation.
In an exemplary embodiment, in relief pattern shaping operation, can form recessed on the surface of Casting Roller 110
Convex pattern 114.
In detail, in relief pattern shaping operation, using Casting Roller master of the bead method to composition Casting Roller 110
The surface of body 112 is surface-treated, and so as to pass through bead method relief pattern 114 is formed.
Bead method is the casting roller main body 112 by the way that shot-peening ball (shot ball) B to be projected Casting Roller 110
Surface processing surface.Here, the shot-peening ball B could be for the shot-peening ball in the bead method of correlation technique.
Preferably, diameter is projected under high pressure be at least the shot-peening ball B of 2.8mm to form the bump maps corresponding to spherical concave formation
The recess of case 114.In this case, the core of the recess of the relief pattern 114 for being pressed by shot-peening ball B can form recessed
Face, and be connected to the part of another recess of the relief pattern 114 being adjacent, i.e. pretreatment convex portion 114a can be with point
Sharp projection is connected thereto.
For example, the convex portion of relief pattern 114 can be recessed with the relief pattern being adjacent 114 with 30 ° or bigger of angle beta
Portion connects.
When relief pattern 114 is formed in relief pattern shaping operation, electrobrightening operation can be carried out.
In electrobrightening operation, by multiple convex portions of the relief pattern 114 formed in the shaping operation of relief pattern 114
It is circular with recess process.
In detail, in electrobrightening operation, wherein Casting Roller 110 is immersed in electrobrightening solution with molten in electrochemistry
It is polished when solution, can be smoothed and be removed some tens of pm to 0.01 μm -0.1 μm of fine jog simultaneously
Relatively large jog, and can be polished simultaneously.
Electrolyte used in electrobrightening operation is mostly acid solution.Additionally, acetic anhydride, alkali and phosphoric acid are also used,
And it is added thereto to the perchloric acid with strong oxdiative power and chromic acid.
In electrobrightening operation, jut is that pretreatment convex portion 114a relatively quickly dissolves, so as in Casting Roller
The convex portion of relief pattern 114 is smoothly formed after 110 surface treatments.
When electrobrightening operation is carried out 4 hours altogether, while when providing electric current with the voltage of 7V-8V, quickly carrying out concavo-convex
The sharp projection part of pattern 114 is the polishing of pretreatment convex portion 114a.Therefore, the convex portion of relief pattern 114 can be being less than
The recess connection of 30 ° of angle and the relief pattern 114 being adjacent, so that whole relief pattern 114 is smoothly formed.
In this case, the electrobrightening condition in electrobrightening operation is described in table 1.
Electrobrightening condition in the operation of the electrobrightening of table 1
The Casting Roller 110 produced in above-mentioned surface treatment method can include surface treating part, and it is in casting roller main body
While multiple convex portions of the relief pattern 114 on 112 surface and multiple recesses carry out electrobrightening by disposed of in its entirety into
It is circular and formed.
As described above, in an exemplary embodiment, when Casting Roller 110 is surface-treated by electrobrightening operation
When, the convex portion of relief pattern 114 and recess smoothly connect each other, therefore, by the table of the foundry goods Y to be produced of Casting Roller 110
Face can have convex portion and the recess of smooth relief pattern 114', and it corresponds to the surface treating part of Casting Roller 110.Therefore,
The foreign body that oxide skin etc. can be prevented is inserted in the convex portion being adjacent.
Even if when a part for foreign body is attached to the surface of foundry goods Y, during being suppressed by roll 130,
The part that ROLLING OIL L etc. easily removes the foreign body can be passed through.It is therefore prevented that inserting during rolling is for thin plate S
Enter foreign body.ROLLING OIL L reduces the frictional force between foundry goods Y and roll 130, so as to reduce the insertion of foreign body.
Preferably, the convex portion of the relief pattern 114 for being formed on Casting Roller 110 connects in its convex portion and the recess being adjacent
Can be connected with the smooth angle less than 30 ° when connecing.In addition, the bump maps formed on the foundry goods Y cast by above-mentioned Casting Roller 110
The convex portion of case 114' can be connected when its convex portion and the recess being adjacent connect with the smooth angle less than 30 °.
In an exemplary embodiment, the coating that formed using the material such as nickel can be formed on Casting Roller 110 with
Improve the wearability on the surface of casting roller main body 112.Furthermore, it is possible to directly be formed in casting roller main body 112 or in coating
Surface treating part.
<Embodiment>
In Casting Roller 110 configured as above, circle is processed into in the convex portion of the relief pattern 114 in surface treating part
Shape.In addition, measurement wherein using embodiment Casting Roller 110 produce foundry goods Y relief pattern 114' convex portion and with its phase
The angle of adjacent recess connection, and measure the defect of the thin plate S of the final product form produced thereafter by rolling foundry goods Y.
Reference table 2, measures the convex portion of the relief pattern 114 formed on the surface of the foundry goods Y cast by Casting Roller 110
Angle and recess between.
When the Casting Roller 110 using correlation technique, wherein on foundry goods Y formed relief pattern convex portion and recess it
Between angle be 25 ° or more of quantity be every 100mm230, region, wherein on foundry goods Y formed its convex portion and recess
Between angle be 30 ° or more of quantity be every 100mm210, region.
Hook-shaped defect H is likely to occur in the thin plate S of the final product form of foundry goods Y Jing rollings wherein.In such case
Under, the representative 1m of measurement2The hook-shaped defect index of the hook-shaped defect H quantity formed in region is 10.
When the Casting Roller 110 using exemplary, wherein on foundry goods Y formed relief pattern convex portion and
It is every 100mm that angle between recess is 25 ° or more of quantity220, region, and wherein on foundry goods Y formed convex portion
It is 0 that angle and recess between is 30 ° or more of quantity.
In an exemplary embodiment, hook-shaped defect H is not in the final product form of foundry goods Y Jing rollings wherein
In thin plate S.
Table 2
As described above, having the convex portion of the relief pattern 114 of 30 ° or greater angle and recess to exist on the surface of foundry goods Y
Hook-shaped defect H is formed in the operation of rolling.In an exemplary embodiment, the convex portion of relief pattern 114 is on the surface of Casting Roller 110
Upper formation, by electrobrightening circle is processed into, and is less than 30 ° of angle, so as to prevent in rolling with permissible roughness
During produce hook-shaped defect H.
Although exemplary illustrated and described above, it will be apparent to those skilled in the art that
, in the case of without departing from the scope of the present disclosure being defined by the appended claims, can modify and change.
Claims (6)
1. surface treatment method, it includes：
The relief pattern shaping operation of relief pattern is formed on the surface of Casting Roller；With
Operated by the electrobrightening of electrobrightening, by the multiple convex of the relief pattern formed in relief pattern shaping operation
Portion and multiple recesses process circular.
2. surface treatment method according to claim 1, wherein, in the relief pattern shaping operation, using shot-peening
Processing method is surface-treated to the surface of the Casting Roller.
3. surface treatment method according to claim 2, wherein, at the shot-peening of the relief pattern shaping operation
In reason method, when being surface-treated to the Casting Roller, the shot-peening ball that diameter is at least 2.8mm is projected.
4. Casting Roller, it includes：
Casting roller main body；With
Surface treating part, it is formed on the surface of the casting roller main body, and is shaped so that by appointing in claim 1-3
Multiple convex portions of relief pattern and multiple recesses are processed circular by the surface treatment method described in.
5. Casting Roller according to claim 4, wherein, the convex portion of the relief pattern is with the angle smoothing less than 30 degree
Connect with the recess of the relief pattern being adjacent.
6. Casting Roller according to claim 4, further includes the coating formed on the surface of the casting roller main body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150157703A KR101767749B1 (en) | 2015-11-10 | 2015-11-10 | Surface treatment method and manufactured casting roll thereby |
| KR10-2015-0157703 | 2015-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106670411A true CN106670411A (en) | 2017-05-17 |
Family
ID=58667691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610985525.4A Pending CN106670411A (en) | 2015-11-10 | 2016-11-09 | Surface treatment method and casting roll manufactured by the same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20170129004A1 (en) |
| KR (1) | KR101767749B1 (en) |
| CN (1) | CN106670411A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113227462A (en) * | 2018-10-26 | 2021-08-06 | 艾斯丘莱普股份公司 | Method for surface treatment of metal or alloy products and metal or alloy products |
| CN113664169A (en) * | 2021-08-23 | 2021-11-19 | 山东理工大学 | Load static variable-opening roll gap for double-roll casting |
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|---|---|---|---|---|
| KR20010056758A (en) * | 1999-12-16 | 2001-07-04 | 이구택 | Apparatus and method for texturing the surface of roll in twin roll strip casting machine |
| KR20020016265A (en) * | 2000-08-25 | 2002-03-04 | 이구택 | Method for Forming Dimple on Surface of Casting Roll of Twin -Roll Strip Caster |
| KR20070067323A (en) * | 2005-12-23 | 2007-06-28 | 주식회사 포스코 | Casting roll having different dimple surface rate according to the surface position |
| KR20090104540A (en) * | 2008-03-31 | 2009-10-06 | 주식회사 포스코 | Magnesium alloys plate casting device |
| US20100300643A1 (en) * | 2007-01-24 | 2010-12-02 | Thyssenkrupp Nirosta Gmbh | Casting roll for a two-roll casting device and two-roll casting device |
| CN102259172A (en) * | 2010-05-25 | 2011-11-30 | 宝山钢铁股份有限公司 | Method for texturing surface of strip-casting crystallization roller |
| CN104002203A (en) * | 2014-05-30 | 2014-08-27 | 宝山钢铁股份有限公司 | Production method of adjustable controllable high-roughness roughened surface of thin belt continuous casting crystallization roller |
| CN104002202A (en) * | 2014-05-30 | 2014-08-27 | 宝山钢铁股份有限公司 | Production method of high-cleanliness and defect-free roughened surface of thin belt continuous casting crystallization roller |
| KR20150045325A (en) * | 2013-10-18 | 2015-04-28 | 주식회사 포스코 | Surface treatment method and manufactured casting roll thereby |
| CN104624994A (en) * | 2013-11-14 | 2015-05-20 | Posco公司 | Casting roll for twin-roll strip caster |
| KR101536432B1 (en) * | 2013-11-08 | 2015-07-13 | 주식회사 포스코 | Casting roll surface treatment method for strip casting and equipment for the same |
-
2015
- 2015-11-10 KR KR1020150157703A patent/KR101767749B1/en active IP Right Grant
-
2016
- 2016-10-27 US US15/336,053 patent/US20170129004A1/en not_active Abandoned
- 2016-11-09 CN CN201610985525.4A patent/CN106670411A/en active Pending
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|---|---|---|---|---|
| KR20010056758A (en) * | 1999-12-16 | 2001-07-04 | 이구택 | Apparatus and method for texturing the surface of roll in twin roll strip casting machine |
| KR20020016265A (en) * | 2000-08-25 | 2002-03-04 | 이구택 | Method for Forming Dimple on Surface of Casting Roll of Twin -Roll Strip Caster |
| KR20070067323A (en) * | 2005-12-23 | 2007-06-28 | 주식회사 포스코 | Casting roll having different dimple surface rate according to the surface position |
| US20100300643A1 (en) * | 2007-01-24 | 2010-12-02 | Thyssenkrupp Nirosta Gmbh | Casting roll for a two-roll casting device and two-roll casting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113227462A (en) * | 2018-10-26 | 2021-08-06 | 艾斯丘莱普股份公司 | Method for surface treatment of metal or alloy products and metal or alloy products |
| CN113664169A (en) * | 2021-08-23 | 2021-11-19 | 山东理工大学 | Load static variable-opening roll gap for double-roll casting |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101767749B1 (en) | 2017-08-14 |
| US20170129004A1 (en) | 2017-05-11 |
| KR20170055088A (en) | 2017-05-19 |
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Application publication date: 20170517 |
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