KR20060075690A - Method for manufacturing cold-rolled ferritic stainless steel having excellent surface brilliant - Google Patents
Method for manufacturing cold-rolled ferritic stainless steel having excellent surface brilliant Download PDFInfo
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- KR20060075690A KR20060075690A KR1020040114556A KR20040114556A KR20060075690A KR 20060075690 A KR20060075690 A KR 20060075690A KR 1020040114556 A KR1020040114556 A KR 1020040114556A KR 20040114556 A KR20040114556 A KR 20040114556A KR 20060075690 A KR20060075690 A KR 20060075690A
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005554 pickling Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000005498 polishing Methods 0.000 claims abstract description 23
- 239000011265 semifinished product Substances 0.000 claims abstract description 19
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 238000005097 cold rolling Methods 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 229910000859 α-Fe Inorganic materials 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 35
- 238000004381 surface treatment Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- 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
-
- 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
- B21B45/0275—Cleaning devices
-
- 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
- B21B45/0275—Cleaning devices
- B21B45/0287—Cleaning devices removing solid particles, e.g. dust, rust
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/221—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 plates, strips, bands or sheets of indefinite length by cold-rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
본 발명은 표면광택이 우수한 페라이트계 스테인리스 냉연강판 제조방법에 관한 것으로서, 중량%로 Cr을 10~35% 함유한 페라이트계 스테인리스 열연강판을 탠덤 압연기에서 냉간압연하고 연속소둔라인에서 소둔처리하여 냉연 반제품을 생산하는 단계와; 상기 냉연 반제품을 산세라인에서 산세처리하는 단계로 이루어지고, 상기 산세라인에서 상기 냉연 반제품은 연마 브러시로 연마처리되는 것을 특징으로 하므로, 최종 냉연제품의 표면 광택도를 향상시켜 냉연제품 제조사 및 최종 고객사에서의 표면처리공정을 생략할 수 있고 또한 제품 제조비용을 낮추어 제품 가격 경쟁력을 높일 수 있다.
The present invention relates to a method for producing a ferritic stainless steel cold rolled steel sheet having excellent surface gloss, cold-rolled semi-finished product by cold rolling a ferritic stainless steel hot rolled steel sheet containing 10% to 35% Cr by weight in a tandem rolling mill and annealing in a continuous annealing line. Producing a; Pickling the cold-rolled semi-finished product in the pickling line, and the cold-rolled semi-finished product in the pickling line is characterized in that the polishing brush is polished, thereby improving the surface gloss of the final cold-rolled product manufacturers and end customers The surface treatment process can be omitted and the cost of the product can be lowered, thereby increasing the price competitiveness of the product.
혼산탱크, 연마 브러시 설비, 냉연 반제품Mixed Tank, Abrasive Brush Equipment, Cold Rolled Semi Finished Products
Description
도 1은 종래의 스테인리스 열연강판의 냉연라인을 도시한 구성도;1 is a configuration diagram showing a cold rolling line of a conventional stainless steel hot rolled steel sheet;
도 2는 본 발명에 따른 스테인리스 열연강판의 냉연라인을 도시한 구성도;Figure 2 is a schematic view showing a cold rolling line of a stainless steel hot rolled steel sheet according to the present invention;
도 3은 본 발명에 따른 냉연라인에서 연마 브러시가 산세라인에 설치되어 있는 상태를 도시한 구성도.Figure 3 is a block diagram showing a state in which the polishing brush is installed in the pickling line in the cold rolling line according to the present invention.
< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>
22 : 탠덤 압연기22: tandem rolling mill
24 : 연속소둔라인24: continuous annealing line
26 : 산세라인26: Pickling Line
26a : 황산탱크26a: sulfuric acid tank
26b : 혼산탱크26b: mixed acid tank
26c : 연마 브러시 설비
26c: Polishing Brush Fixture
본 발명은 중량%로 Cr을 10~35% 함유한 400계 스테인리스강의 냉연강판을 제조하는 방법에 관한 것이고, 더 상세하게 스테인리스 열연강판을 냉간압연하고 열처리 한 후 산세처리하여 표면광택을 향상시킬 수 있는 페라이트계 스테인리스 냉연강판을 제조하는 방법에 관한 것이다.The present invention relates to a method for producing a cold rolled steel sheet of 400-based stainless steel containing 10 to 35% Cr by weight, and more particularly, to cold-roll and heat-treat the stainless steel hot rolled steel sheet to improve surface gloss. The present invention relates to a method for manufacturing a ferritic stainless steel cold rolled steel sheet.
일반적으로, 400계 스테인리스강, 즉 페라이트계 스테인리스강은 배기계 및 콘테이너용 분야에 주로 사용되는 강종이다. 그리고, 이러한 페라이트계 스테인리스강은 배기계 및 콘테이너 등의 외장용으로 사용되기 때문에 균일한 표면색상을 구비하여야 하였다. Generally, 400 series stainless steel, ie, ferritic stainless steel, is a type of steel mainly used in the field of exhaust systems and containers. Since the ferritic stainless steel is used for exteriors such as exhaust systems and containers, it has to have a uniform surface color.
페라이트계 스테인리스 냉연강판은 일반적인 스테인리스 냉연제품 생산공정인 ZRM(Zimna Cold Rolling Mill)-C-APL 공정을 통해서 생산되었다. 즉, 도 1을 참조하면, 스테인리스 열연코일(1)에서 권취해제된 스트립(1a)은 가역식 다단압연기(12)에서 냉간압연되고 소둔산세처리된 후에 냉연코일(2)로 권취되었다. 그러나, 가역식 다단압연기를 사용하는 경우에는 실수율 및 생산성이 낮아져서 페라이트계 스테인리스 냉연제품의 생산원가가 올라가는 문제점이 있었다.Ferritic stainless steel cold rolled steel sheet was produced through ZRM (Zimna Cold Rolling Mill) -C-APL process, which is a general stainless steel cold rolled product production process. That is, referring to FIG. 1, the strip 1a unwound in the stainless steel hot rolled
한편, 압연과정에서의 생산원가를 낮추기 위하여 일반강 제조공정인 탠덤 압연기(TCM; Tandem Cold Rolling Mill)에서의 압연공정과, 연속소둔라인(CAL: Continuous Annealing Line)에서의 연속소둔공정과, 소둔산세라인(PL: Pickling Line)에서의 산세공정을 거쳐서 페라이트계 스테인리스 냉연제품을 생산하는 기술이 도입되었다. 그 결과, 가역식 다단압연기를 사용하는 경우에 비해서 실수율과 생산성을 높여 상대적으로 낮은 제조비용으로 제품을 생산할 수 있었다.On the other hand, in order to reduce the production cost during the rolling process, a rolling process in a tandem cold rolling mill (TCM), a general steel manufacturing process, a continuous annealing process in a continuous annealing line (CAL), and an annealing A technology of producing ferritic stainless steel cold rolled products was introduced through a pickling process on a pickling line (PL). As a result, it was possible to produce a product at a relatively low manufacturing cost by increasing the error rate and productivity compared to the case of using a reversible multi-stage rolling mill.
그러나, TCM-CAL-PL을 경유한 스테인리스 제품은 400계 스테인리스강 특유의 리징(Ridging) 결함인 표면요철로 인한 표면광택 불균일성에 의한 표면색상 불량이 발생하였다. 따라서, 수요가는 표면광택의 균일성을 높이기 위하여 폴리싱(Polishing)과 같은 별도의 표면처리공정을 거친 다음 사용되어 왔다. 이와 같은 별도의 표면처리공정은 제조사나 고객사 입장에서 추가비용이 드는 문제점을 안고 있었다.However, a stainless steel product via TCM-CAL-PL has a surface color defect due to surface gloss non-uniformity due to surface irregularities, which is a unique rigging defect of 400 series stainless steel. Therefore, demand has been used after a separate surface treatment process such as polishing to increase the uniformity of the surface gloss. Such a separate surface treatment process had a problem of additional cost for the manufacturer or the customer.
배기계 및 콘테이너의 용도에 사용되는 제품은 일반적으로 등급이 낮은 용도로 분류되어 다른 스테인리스강 제품 대비 상대적으로 시장경쟁이 치열하여 제품 가격이 낮게 형성되어 있다. 결과적으로, 최종 고객의 입장에서는 치열한 경쟁시장에서 생존하기 위하여 자체 제조비용 절감을 위한 여러 노력을 경주하고 있다는 점을 고려하면 추가비용은 불리한 경쟁력을 제공할 뿐이다.
Products used for exhaust systems and containers are generally classified as low grade applications, and the product price is low due to the fierce market competition compared to other stainless steel products. As a result, the additional costs only provide an unfavorable competitive advantage, considering that end-users are struggling to reduce their own manufacturing costs in order to survive in a fiercely competitive market.
본 발명은 상기된 바와 같은 종래의 문제점을 해결하기 위하여 제안된 것으로, 일반강 냉연제품 제조설비를 구성하는 TCM-CAL 공정을 이용하여 냉연 반제품을 생산하고 상기 냉연 반제품은 스테인리스강 제조설비를 구성하는 PL(Pickling Line) 공정에서 연마 브러시(Abrasive Brush) 설비에 의해 표면처리되면서 산세처 리되어 표면결함인 리징(Ridging)을 제거할 수 있는 표면광택이 우수한 페라이트계 스테인리스 냉연강판 제조방법을 제공하는 데 그 목적이 있다.The present invention has been proposed in order to solve the conventional problems as described above, by using the TCM-CAL process constituting the general cold-rolled steel products manufacturing equipment to produce cold-rolled semi-finished products and the cold-rolled semi-finished products to constitute a stainless steel manufacturing equipment To provide a method for manufacturing ferritic stainless steel cold rolled steel sheet with excellent surface gloss that can be removed by surface treatment by an abrasive brush facility in a pickling line process to remove ridding, which is a surface defect. The purpose is.
또한, 본 발명은 냉연제품 제조업체 입장에서 공정생략에 의한 제품 제조비용을 낮추어 제품 가격 경쟁력을 높일 수 있고 제품 광택성이 개선되어 최종 고객사 입장에서는 표면처리가 필요 없는 제품을 사용할 수 있는 표면광택이 우수한 페라이트계 스테인리스 냉연강판 제조방법을 제공하는 데 그 목적이 있다.
In addition, the present invention can improve the product price competitiveness by lowering the product manufacturing cost by the process omission from the point of view of the cold rolled products manufacturers, and the product gloss is improved, the surface gloss that can use the product that does not require surface treatment from the end customers The purpose is to provide a method for producing a ferritic stainless steel cold rolled steel sheet.
상기의 목적을 달성하기 위하여, 본 발명에 따르면, 표면광택이 우수한 페라이트계 스테인리스 냉연강판 제조방법은 중량%로 Cr을 10~35% 함유한 페라이트계 스테인리스 열연강판을 탠덤 압연기에서 냉간압연하고 연속소둔라인에서 소둔처리하여 냉연 반제품을 생산하는 단계와; 상기 냉연 반제품을 산세라인에서 산세처리하는 단계로 이루어지고, 상기 산세라인에서 상기 냉연 반제품은 연마 브러시로 연마처리되는 것을 특징으로 한다.In order to achieve the above object, according to the present invention, a method for producing a ferritic stainless steel cold rolled steel sheet having excellent surface gloss is cold-rolled and continuous annealing a ferritic stainless steel hot-rolled steel sheet containing 10 to 35% Cr by weight in a tandem rolling mill Annealing in a line to produce a cold rolled semi-finished product; Pickling the cold-rolled semi-finished product in the pickling line, characterized in that the cold-rolled semi-finished product in the pickling line is polished with an abrasive brush.
산세탱크는 황산탱크와 혼산탱크로 이루어진 것이 바람직하다.The pickling tank is preferably composed of a sulfuric acid tank and a mixed acid tank.
바람직하게, 상기 연마 브러시는 상기 혼산탱크에 설치되는 것이 바람직하다.
Preferably, the polishing brush is preferably installed in the mixed acid tank.
이하, 첨부도면을 참조하여 본 발명에 따른 표면광택이 우수한 페라이트계 스테인리스 냉연강판 제조방법을 설명한다. Hereinafter, a method for manufacturing a ferritic stainless steel cold rolled steel sheet having excellent surface gloss according to the present invention will be described with reference to the accompanying drawings.
먼저, 본 발명에서 제조하고자 하는 스테인리스 냉연강판은 배기계 및 콘테이너용으로 사용되는 모든 페라이트계 스테인리스 냉연강판을 지칭한다. 그리고, 본 발명에 따르면, 일반 스테인리스 생산공정에서 생산되는 페라이트계 스테인리스 열연제품은 일반강 냉연제품 생산공정인 TCM-CAL 공정을 경유하여 냉간압연 및 열처리되어 냉연 반제품으로 생산된다. 이 후에, 냉연 반제품에 대한 산세처리 공정은 연마 브러시 설비가 설치되어 있는 PL 공정에서 산세처리되고 표면처리되어 최종 페라이트계 스테인리스 냉연제품으로 생산된다.First, the stainless steel cold rolled steel sheet to be produced in the present invention refers to all ferritic stainless steel cold rolled steel sheets used for exhaust systems and containers. Further, according to the present invention, the ferritic stainless steel hot rolled product produced in the general stainless steel production process is cold rolled and heat treated via the TCM-CAL process, which is a general steel cold rolled product production process, to produce a cold rolled semi-finished product. After that, the pickling process for the cold rolled semifinished product is pickled and surface treated in a PL process in which an abrasive brush facility is installed to produce a final ferritic stainless steel cold rolled product.
상술된 바와 같이 페라이트계 스테인리스 냉연제품을 생산하는 공정을 구분하는 이유는 다음과 같다.As described above, the reason for distinguishing a process for producing a ferritic stainless steel cold rolled product is as follows.
배기계 및 콘테이너용으로 사용되는 페라이트계 스테인리스강은 상술된 바와 같이 그 용도로 볼 때 일반적으로 낮은 등급으로 분류되므로, 제품가격 경쟁력이 매우 중요하다. 따라서, 일반강 냉연제품 생산공정인 TCM-CAL 공정을 이용하면 냉연 반제품으로 생산하면, 일반적인 스테인리스 냉연제품 생산공정인 ZRM-C-APL 공정과 비교하여 실수율 및 생산성 측면에서 매우 유리하여 냉연 반제품의 제조가격이 크게 낮아질 수 있다.Ferritic stainless steels used for exhaust systems and containers are generally classified as low grades for their use as described above, so product price competitiveness is very important. Therefore, when using the TCM-CAL process, which is a production process for general cold-rolled steel products, the production of cold-rolled semi-finished products is very advantageous in terms of real error rate and productivity compared to the ZRM-C-APL process, which is a general stainless steel cold-rolled product production process. The price can be significantly lowered.
또한, 일반강 냉연제품 생산공정을 통해서 배기계 및 콘테이너용 페라이트계 스테인리스 냉연강판의 최종제품은 제조사나 최종 고객사에서 표면색상 균일성을 높이기 위하여 폴리싱과 같은 별도의 표면처리 공정을 거친 다음 사용되어 왔었다. 이는 제조사나 고객사 입장에서 별도의 표면처리 공정을 거쳐야하므로 추가비용이 소요되는 문제점을 안고 있었다. 따라서, 본 발명에 따라서, 상술된 냉연 반제품 을 연마 브러시 설비가 설치되어 있는 PL공정에서 산세처리하고 표면처리함으로써 최종 냉연제품의 광택성을 개선시킬 수 있다.
In addition, the final product of the ferritic stainless steel cold rolled steel sheet for the exhaust system and the container through the production process of the general steel cold rolled products has been used after a separate surface treatment process such as polishing in order to increase the uniformity of the surface color in the manufacturer or the end customer. This has a problem that additional cost is required because a separate surface treatment process from the manufacturer or customer's point of view. Therefore, according to the present invention, the glossiness of the final cold rolled product can be improved by pickling and surface treating the cold rolled semi-finished product described above in a PL process in which an abrasive brush facility is installed.
이하, 본 발명에 따라서 페라이트계 스테인리스 냉연강판을 생산하는 과정을 상세하게 설명한다.Hereinafter, a process of producing a ferritic stainless steel cold rolled steel sheet according to the present invention will be described in detail.
도 2를 참조하면, 중량%로 Cr을 10~35% 함유한 페라이트계 스테인리스 열연코일(1)에서 권취해제된 스트립(1a)은 탠덤 압연기(22)를 통과하면서 소정 치수를 갖도록 냉간압연된다. 그리고, 냉간압연된 스트립(1a)은 연속소둔라인(24)를 통과하면서 소둔처리되어 냉연 반제품으로 생산된다.Referring to FIG. 2, the strip 1a unwound in a ferritic stainless steel hot rolled
상기 냉연 반제품은 연마 브러시 설비(26c; 도 3 참조)가 설치되어 있는 산세라인(26)을 통과하면서 산세처리되고 표면처리된 후에 최종 냉연코일(2)로 권취된다. 산세라인(26)은 일반 스테인리스 냉연제품 생산라인을 구성하는 산세라인으로서, 황산탱크(26a)와 혼산탱크(26b)를 포함한다. 바람직하게, 연마 브러시 설비(26c)는 혼산탱크(26b)에 설치된다.
The cold rolled semifinished product is pickled and surface treated while passing through a
이하, 연마 브러시 설비(26c)의 연마 브러시에 대해 설명한다.Hereinafter, the polishing brush of the
연마 브러시는 스트립(1a) 표면에 형성된 스케일을 기계적인 방식으로 제거하기 위해 사용하는 산세 탱크, 특히 혼산탱크(26b)의 전후에 설치되어 화학적인 산세를 도와주는 역할을 수행한다. 이러한 연마 브러시는 양면 연삭을 기본으로 하며, 압하율은 2~3mm 범위로서 압하율이 크면 스트립에 인가되는 부하가 증가하여 연삭량이 증가한다. 또한, 연마 브러시의 회전수는 600~1200rpm 범위이다. 스트립 표면을 연마하는 동안, 연마 브러시 에지부의 사용수명 증가를 위해 50mm 오실레이션(Oscillation) 된다.The polishing brush is installed before and after pickling tanks, especially mixed
이와 같이 연마 브러시를 사용하는 이유는 산세탱크에서의 화학적인 산세만을 이용하여 산세처리한 경우에 안정적인 산세품질 확보를 위하여 화학적인 산세를 강화할 수 밖에 없다. 이 경우, 과산세로 인한 스트립 표면의 광택도가 저하하는 문제가 발생하게 된다. 특히, 이러한 문제는 409L과 같은 저탄소 Cr강에서 두드러 진다. The reason for the use of the polishing brush is to intensify the chemical pickling to ensure a stable pickling quality when pickling using only the chemical pickling in the pickling tank. In this case, the problem that the glossiness of the surface of the strip due to the pickling is lowered. In particular, this problem is prominent in low carbon Cr steels such as 409L.
그러나, 본 발명에 따라서 연마 브러시 설비를 산세라인에 설치하여 스트립을 산세처리한 경우에는 연마 브러시의 연마작용에 의한 광택도 증가 효과와 함께 산세용액에 의한 화학적 산세강도를 낮추므로 과산세를 방지하여 스트립의 광택도를 증가시킨다. However, according to the present invention, when the polishing brush facility is installed in the pickling line and the strip is pickled, the acid pickling strength is lowered by the pickling solution and the increase in the glossiness due to the polishing action of the polishing brush is prevented. Increase the glossiness of the strip.
일반강 냉연제품 생산공정인 TCM-CAL-PL 공정을 통해서 생산된 페라이트계 스테인리스 냉연제품의 표면 광택도는 광택도 측정기 60도에서 30~60 정도인데 반하여, 본 발명에 따라서 연마 브러시 설비가 설치되어 있는 산세설비에서 산세처리 및 표면처리한 경우에는 표면 광택도가 110 이상임을 알 수 있었다.The surface glossiness of the ferritic stainless steel cold rolled product produced through the TCM-CAL-PL process, which is a general steel cold rolled product production process, is about 30 to 60 to 60 degrees of the glossmeter, and an abrasive brush facility is installed according to the present invention. It was found that the surface glossiness was more than 110 when pickling and surface treatment were performed in a pickling facility.
이와 같이 산세공정에서 연마 브러시 설비를 설치하여 활용하면 표면 광택이 우수한 냉연 제품을 얻는 것 이외에 부가적으로 연마 브러시를 사용하지 않는 경우보다 산세공정의 생산성을 크게 높일 수 있어 산세공정에서의 산세비용을 크게 줄일 수 있다.
Thus, by installing and utilizing the polishing brush facility in the pickling process, in addition to obtaining a cold rolled product with excellent surface gloss, the productivity of the pickling process can be significantly increased compared to the case where no polishing brush is used. Can be greatly reduced.
상기 내용은 본 발명의 바람직한 실시예를 단지 예시한 것으로 본 발명이 속하는 분야의 당업자는 첨부된 청구범위에 기재된 본 발명의 사상 및 요지로부터 벗어나지 않고 본 발명에 대한 수정 및 변경을 가할 수 있다는 것을 인식하여야 한다.
The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains recognize that modifications and variations can be made to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. shall.
본 발명에 따르면, 일반강 냉연제품을 생산하는 생산라인에서 냉간압연되고 소둔처리된 냉연 반제품을 연마 브러시 설비가 설치되어 있는 산세라인에서 산세처리하고 연마처리하여 표면 광택도가 향상된 최종 냉연제품으로 생산함으로써, 냉연제품 제조사 및 최종 고객사에서의 표면처리공정을 생략할 수 있고 또한 제품 제조비용을 낮추어 제품 가격 경쟁력을 높일 수 있다.
According to the present invention, the cold-rolled and annealed cold-rolled semi-finished product in the production line for producing cold-rolled steel products is pickled and polished in a pickling line equipped with a polishing brush facility to produce a final cold-rolled product having improved surface gloss. By doing so, it is possible to omit the surface treatment process at the cold rolled product manufacturers and end customers, and to increase the product price competitiveness by lowering the product manufacturing cost.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008082096A1 (en) * | 2006-12-28 | 2008-07-10 | Posco | Ferritic stainless steel with execellent corrosion resistnace and excellent discoloration resistance |
| KR101066579B1 (en) * | 2008-12-16 | 2011-09-22 | 주식회사 포스코 | Surface treatment method for ferritic stainless hot-rolled steel plate |
| KR101228806B1 (en) * | 2010-12-27 | 2013-01-31 | 주식회사 포스코 | Method for pickling titanium cold rolled steel sheet |
| KR101230081B1 (en) * | 2010-12-01 | 2013-02-05 | 주식회사 포스코 | Pickling method of titanium slab and titanium slab manufactured using the same |
| KR20160075972A (en) | 2014-12-19 | 2016-06-30 | 주식회사 포스코 | Ferritic stainless steel sheet with excellent surface bright and manufacturing method thereof |
| KR20200016008A (en) * | 2018-08-06 | 2020-02-14 | 주식회사 포스코 | Lean duplex stainless steel for architecture and method for manufacturing thereof |
| CN112642877A (en) * | 2020-08-12 | 2021-04-13 | 杨勇 | One-step production process for stainless steel products from hot-rolled black skin to cold-rolled 2B or 2D plate surface |
-
2004
- 2004-12-29 KR KR1020040114556A patent/KR20060075690A/en not_active Application Discontinuation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008082096A1 (en) * | 2006-12-28 | 2008-07-10 | Posco | Ferritic stainless steel with execellent corrosion resistnace and excellent discoloration resistance |
| KR101066579B1 (en) * | 2008-12-16 | 2011-09-22 | 주식회사 포스코 | Surface treatment method for ferritic stainless hot-rolled steel plate |
| KR101230081B1 (en) * | 2010-12-01 | 2013-02-05 | 주식회사 포스코 | Pickling method of titanium slab and titanium slab manufactured using the same |
| KR101228806B1 (en) * | 2010-12-27 | 2013-01-31 | 주식회사 포스코 | Method for pickling titanium cold rolled steel sheet |
| KR20160075972A (en) | 2014-12-19 | 2016-06-30 | 주식회사 포스코 | Ferritic stainless steel sheet with excellent surface bright and manufacturing method thereof |
| KR20200016008A (en) * | 2018-08-06 | 2020-02-14 | 주식회사 포스코 | Lean duplex stainless steel for architecture and method for manufacturing thereof |
| CN112642877A (en) * | 2020-08-12 | 2021-04-13 | 杨勇 | One-step production process for stainless steel products from hot-rolled black skin to cold-rolled 2B or 2D plate surface |
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