KR19980010947U - Descaling device of hot rolled plate surface during hot rolling of stainless steel - Google Patents
Descaling device of hot rolled plate surface during hot rolling of stainless steel Download PDFInfo
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- KR19980010947U KR19980010947U KR2019960024426U KR19960024426U KR19980010947U KR 19980010947 U KR19980010947 U KR 19980010947U KR 2019960024426 U KR2019960024426 U KR 2019960024426U KR 19960024426 U KR19960024426 U KR 19960024426U KR 19980010947 U KR19980010947 U KR 19980010947U
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- Prior art keywords
- pressure water
- hot rolled
- hot
- high pressure
- scale
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- 238000005098 hot rolling Methods 0.000 title claims abstract description 15
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 5
- 239000010935 stainless steel Substances 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000012467 final product Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- B21B45/04—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 de-scaling, e.g. by brushing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Metal Rolling (AREA)
Abstract
본 고안은 제철소에서의 스테인레스강 열간압연공정 중 가열로 및 열간압연과정 중에서 스테인레스 슬라브나 열연판 표면에 형성된 스케일(scale)을 스팀블로워 및 고압수를 이용하여 스케일을 효과적으로 제거시킬 수 있도록 한 스테인레스강 열간압연시 열연판 표면의 스케일 제거장치에 관한 것으로, 열간압연공장의 조압연공정에서 고압수 분사장치를 열연판 폭방향과 15~45°의 각도를 갖도록 설치하고, 아울러 상기 고압수 분사장치 일측에 스팀블로워를 상기 고압수 분사장치와 평행하게 설치하여, 스테인레스 슬라브 및 열연판 표면의 스케일을 냉각시킨후 즉시 30~60°각도를 갖는 분사패턴으로 고압수를 분사하여 열연판표면 스케일을 완전하게 박리시킬 수 있도록 한 것이다.The present invention is designed to remove scales on the surface of the stainless slab or hot rolled plate during the hot rolling process and the hot rolling process in the steel mill by using a steam blower and high pressure water. The present invention relates to a device for descaling the surface of a hot rolled sheet during hot rolling, wherein the high-pressure water spray device is installed to have an angle of 15 to 45 ° with the width direction of the hot rolled plate in the rough rolling process of a hot rolling mill. A steam blower was installed in parallel with the high pressure water injector, and after cooling the scale of the surface of the stainless slab and the hot rolled sheet, the high pressure water was sprayed in a spray pattern having an angle of 30 to 60 ° to completely scale the hot rolled sheet surface. It was to be able to peel off.
Description
본 고안은 제철소에서의 스테인레스강 열간압연공정 중 가열로 및 열간압연과정 중에서 스테인레스 슬라브나 열연판 표면에 형성된 스케일(scale)을 스팀블로워 및 고압수를 이용하여 스케일을 효과적으로 제거시킬 수 있도록 한 스테인레스강 열간압연시 열연판 표면의 스케일 제거장치에 관한 것이다.The present invention is designed to remove scales on the surface of the stainless slab or hot rolled plate during the hot rolling process and the hot rolling process in the steel mill by using a steam blower and high pressure water. The present invention relates to an apparatus for descaling the surface of a hot rolled sheet during hot rolling.
일반적으로 스테인레스강 열간압연 공정의 가열로에서 재가열된 압연재의 표면에는 1차 스케일 (가열로스케일)이 두껍게 형성된다.In general, the primary scale (heating scale) is formed thick on the surface of the reheated rolling material in the heating furnace of the stainless steel hot rolling process.
이와 같이 스케일이 생성된 스테인레스 열연강판을 압연하면 스케일이 열연강판에 압입되어 제품의 표면결함을 유발시킨다.As such, when the stainless hot rolled steel sheet on which the scale is formed is rolled, the scale is pressed into the hot rolled steel sheet to cause surface defects of the product.
그러므로 열간압연 공정에서 스케일 결함이 없는 제품을 생산하기 위해서는 폭압연기 출측과, 조압연기 입출측 및 사상압연기 입측에 고압의 스케일 제거장치(hydraullc descaler)를 사용하고 있다.Therefore, in order to produce a product without scale defects in the hot rolling process, a high pressure hydraulic descaler is used at the exit of the width rolling mill, the entrance of the rough rolling mill, and the entrance of the finishing mill.
종래의 스케일제거장치 작동방법은 열연판의 압연방향과 수직으로 설치된 고압수 분사장치에서 100~200kgf/㎠의 고압수를 열연강판 표면에 분사하여 이 고압수압력에 의해 불려나가게 하는 방법(일본국 특허공보 소 62-47086, 소 52-14087) 및 열연판표면에 쇼트(short)를 분사충돌시켜 스케일을 제거하는 방법, 그리고 롤레벨러(roll leveler) 등의 기계를 이용하여 열연판 표면변형을 부여하여 스케일을 제거하는 방법(일본국 특허공보 소 57-36013) 등이 있다.The conventional method of descaling device is a method of spraying high pressure water of 100-200kgf / ㎠ on the surface of hot-rolled steel sheet in a high-pressure water injector installed perpendicular to the rolling direction of the hot-rolled sheet to be called by this high-pressure water pressure. Patent Publication Nos. 62-47086, 52-14087) and a method for removing scales by spraying shorts on the hot rolled sheet surface, and imparting surface deformation of the hot rolled sheet using a machine such as a roll leveler. To remove the scale (Japanese Patent Publication No. 57-36013).
열연판의 압연방향과 수직으로 설치된 고압수분사장치에서 고압수를 분사시켜 스케일을 제거하는 경우가 가장 보편적으로 사용되고 있다.In the high pressure water spraying device installed perpendicular to the rolling direction of the hot rolled sheet, the high pressure water is sprayed to remove the scale.
이러한 종래의 방법은 탈스케일이 쉬운 일반강의 경우에는 열연판의 완전한 박리효과를 얻을 수 있지만, 박리가 어려운 스테인레스강의 경우에는 열연판 표면에 스케일을 완전히 박리시키지 못하여 최종 열연제품의 표면품질을 크게 저하시키는 문제점이 있었다.This conventional method can achieve the perfect peeling effect of the hot rolled sheet in the case of ordinary steel that is easy to descale, but in the case of stainless steel, which is difficult to peel off, the surface quality of the final hot rolled product is greatly deteriorated because the scale cannot be completely peeled off the hot rolled sheet. There was a problem letting.
본 고안은 상기와 같은 종래기술의 문제점을 해소하기 위해 고안한 것으로, 열연조압연공정에서의 스케일제거장치로 고압수 분사장치를 열연판 폭방향과 15~45°의 각도를 갖도록 설치하고, 아울러 상기 고압수분사 장치의 입측에 스팀블러워를 상기 고압수분사장치와 평행하게 설치하여 스테인레스 슬라브 및 열연판표면의 스케일을 700~900℃로 냉각시킨 후 즉시 30~45°각도를 갖는 고압수 분사패턴(descallng pattern)으로 고압수를 분사하여 열연판표면 스케일을 완전하게 박리시킬 수 있는 스케일 제거장치를 마련함에 그 목적이 있다.The present invention is devised to solve the problems of the prior art as described above, the high-pressure water injection device is installed to have an angle of 15 ~ 45 ° with the hot roll width direction as a scale removing device in the hot rolling mill process, A high pressure water jet having a 30 to 45 ° angle immediately after cooling the scale of the surface of the stainless slab and hot rolled sheet to 700 ~ 900 ° C by installing a steam blower in parallel with the high pressure water jet device at the inlet of the high pressure water jet device. It is an object of the present invention to provide a descaling device capable of completely peeling off the hot-rolled plate surface scale by spraying high pressure water in a pattern.
본 고안은 상기와 같은 목적을 달성하기 위하여, 열연공정 중 고압수분사장치를 열연판 폭방향과 15~45°의 각도를 갖도록 설치하고, 아울러 상기 고압수분사장치 일측에 스팀블로워를 상기 고압수분사장치와 평행하게 설치하여 스테인레스 슬라브 및 열연판 표면의 스케일을 700~900℃로 냉각시킨 후 즉시 30~45°각도를 갖는 고압수분사패턴으로 고압수를 분사하여 열연판표면 스케일을 완전하게 박리시킬 수 있는 스케일 제거장치로 이루어져 있다.In order to achieve the above object, the present invention provides a high pressure water spraying device having an angle of 15 to 45 ° with a width direction of a hot rolled plate during a hot rolling process, and a steam blower on one side of the high pressure water spraying device. It is installed parallel to the spraying device to cool the scale of stainless slab and hot rolled plate surface to 700 ~ 900 ℃, and then immediately sprays high pressure water with high pressure water spray pattern with 30 ~ 45 ° angle to completely peel off the hot rolled plate surface scale. It consists of a descaling device that can be used.
도1은 종래의 스케일 제거장치 개략도1 is a schematic diagram of a conventional scale removing device
도2는 본 고안의 스케일 제거장치 개략도Figure 2 is a schematic diagram of the descaler of the present invention
도3은 종래의 스케일 제거장치와 본 고안의 스케일 제거장치를 사용하였을 경우 스케일 제거효율의 비교도Figure 3 is a comparison of the descaling efficiency when using a conventional descaling device and the descaling device of the present invention
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10 : 고압수 분사장치(descallng header)20 : 고압수 분사패턴10: high pressure water spray device (descallng header) 20: high pressure water spray pattern
30 : 열연판40 : 스팀블로워30: hot rolled plate 40: steam blower
도 1은 종래의 스케일 제거장치의 개략도로써 종래의 고압수분사장치(10) 노즐은 시계방향으로 15°들려서 장착하기 때문에 고압수 분사패턴(20)은 압연판(30)위에 15°로 기울어진 분사패턴을 나타내며, 한 개 노즐에 의한 분사패턴은 인접노즐에 의한 분사패턴과 오버랩(over lap)된 모습을 보여준다.1 is a schematic diagram of a conventional scale removing apparatus, and since the nozzle of the conventional high pressure water jetting device 10 is mounted by lifting 15 ° clockwise, the high pressure jet pattern 20 is inclined 15 ° on the rolled plate 30. The spray pattern is shown, and the spray pattern by one nozzle shows the overlapping pattern with the spray pattern by the adjacent nozzle.
일반강의 경우에는 슬라브 및 열연판(30)표면 스케일을 고온에서 취성을 갖고 있으므로 수직압력이 큰 15°고압수 분사패턴으로도 완전한 스케일 박리가 가능하지만, 스테인레스 경우는 열연판(30)표면 스케일이 고온에서 연성을 갖고 있으므로 종래의 분사방법에 의해 효과적으로 박리가 되지 않는 단점이 있다.In the case of general steel, the surface scale of the slab and hot rolled sheet 30 is brittle at high temperature, and thus, the scale can be completely peeled off even in the case of 15 ° high pressure spray pattern having a large vertical pressure. Since it has ductility at high temperature, there is a disadvantage in that it cannot be peeled off effectively by the conventional injection method.
따라서 이어지는 수평 압연과정에서 미박리된 가열로 스케일이 모재에 압입되어 최종제품의 표면 결합으로 나타난다.Therefore, in the subsequent horizontal rolling process, the unpeeled heating scale is press-fitted into the base material to appear as a surface bond of the final product.
도 2는 본 발명으로 안출된 스케일 제거방법의 개략도로서 도 1의 종래 방법과는 달리, 고압수 분사장치를 열연판 폭방향과 15~45°의 각도를 갖도록 설치하고, 아울러 상기 입축에 스팀블로워를 설치하여 스테인레스 슬라브표면의 가열로스케일 700~900℃로 냉각시킨 후 즉시 30~60°각도를 갖는 고압수 분사패턴으로 고압수를 분사하여 열연판(30)의 한쪽 모서리부터 열연판(30)표면 스케일을 수직압력이 아닌 45°에 근접한 전단압력으로 완전하게 박리 시킬 수 있는 스케일 제거장치를 나타낸다.2 is a schematic diagram of a scale removing method devised by the present invention, unlike the conventional method of FIG. 1, a high pressure water injector is installed to have an angle of 15 to 45 ° with a width direction of a hot rolled sheet, and a steam blower is installed on the grain axis. After cooling to a heating furnace scale of 700 ~ 900 ℃ of the surface of the stainless slab and spraying high-pressure water in a high-pressure water spray pattern having an angle of 30 ~ 60 ° immediately hot-rolled plate 30 from one corner of the hot-rolled plate 30 It shows a scale removal device that allows the surface scale to be peeled off completely at shear pressure close to 45 ° instead of vertical pressure.
본 고안에 의한 고압수분사장치는 종래의 고압수분사장치를 열연판 폭방향과 15~45°의 각도를 갖도록 설치하였기 때문에 고압수 분사패턴은 30~60°각도를 나타내게 된다.The high pressure water injection device according to the present invention has been installed to have a high pressure water injection device having an angle of 15 to 45 ° with the width direction of the hot rolled plate, and thus the high pressure water injection pattern exhibits an angle of 30 to 60 °.
실시예Example
하기 표1은 본 고안에 의한 분사조건과 종래조건으로 고압수 분사를 하였을 경우 스테인레스열연판 스케일박리율을 상호 비교한 것이다.Table 1 is a comparison of the hot-rolled sheet scale peeling rate when the high-pressure water injection in the injection conditions and conventional conditions according to the present invention.
수직압력이 큰 15°고압수 분사패턴을 갖는 종래의 방법을 사용시 스테인레스 열연판표면 스케일의 박리율은 60~70%로 저조하기 때문에 최종제품의 표면품질이 불량한 결과를 가져오고 있다.When the conventional method having a 15 ° high pressure jet pattern having a large vertical pressure is used, the peeling rate of the stainless steel sheet surface scale is low at 60 to 70%, resulting in poor surface quality of the final product.
그러나 본 고안에 의한 방법으로 분사시 박리율은 고압수 분사패턴의 각도가 30°일때 80~90%, 45°일때, 95~100%, 60°일때, 75~90%를 나타내어 분사의 충돌압력이 45°의 전단응력을 갖을 때 가장 우수한 박리율을 나타내는 것을 알 수 있다.However, the peeling rate when spraying by the method according to the present invention is 80 ~ 90% when the angle of the high-pressure water spray pattern is 30 °, 95 ~ 100% when the angle is 45 °, and 75 ~ 90% when the temperature is 60 °. It can be seen that it shows the best peeling rate when the shear stress is 45 °.
상기의 결과를 그래프로 나타낸 것이 도 3이다.3 is a graph showing the above results.
본 고안에 의한 분사 조건과 종래조건과의 비교Comparison between injection conditions and conventional conditions according to the present invention
이상과 같은 본 고안은 열연공정의 압연설비가 최신화 및 연속화됨에 따라 종래의 탑스케일 설비에 신 개념의 탈스케일장치를 도입하여 보다 높은 표면품질의 스테인레스 열연강판을 제조하기 위한 스케일 제거장치로서 열간압연 후 스케일결함이 없는 무결함 스테인레스 열연강판을 제조할 수 있는 효과가 있다.The present invention as described above is hot-rolled as a scale removing device for manufacturing stainless hot rolled steel sheet of higher surface quality by introducing a new concept of descaling device to the conventional top scale equipment as the rolling equipment of the hot rolling process is updated and continuous. After rolling, there is an effect that can produce a defect-free stainless hot rolled steel sheet without a scale defect.
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| KR2019960024426U KR200234109Y1 (en) | 1996-08-14 | 1996-08-14 | Descaling device for hot rolled surface during stainless steel hot rolling |
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| KR2019960024426U KR200234109Y1 (en) | 1996-08-14 | 1996-08-14 | Descaling device for hot rolled surface during stainless steel hot rolling |
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| KR200234109Y1 KR200234109Y1 (en) | 2001-11-22 |
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| KR20180110085A (en) * | 2016-03-18 | 2018-10-08 | 에스엠에스 그룹 게엠베하 | Apparatus for manufacturing processed materials of predetermined type and method thereof |
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| KR20020038888A (en) * | 2000-11-18 | 2002-05-24 | 이구택 | Method For Manufacturing A Hot Rolled Steel Strip And Device For Removing Oxide Film On The Hot Rolled Steel Strip |
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| KR20180110085A (en) * | 2016-03-18 | 2018-10-08 | 에스엠에스 그룹 게엠베하 | Apparatus for manufacturing processed materials of predetermined type and method thereof |
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| KR200234109Y1 (en) | 2001-11-22 |
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