KR100518754B1 - Method of worm rolling using a tendem rolling mill for austenitic stainless steel - Google Patents
Method of worm rolling using a tendem rolling mill for austenitic stainless steel Download PDFInfo
- Publication number
- KR100518754B1 KR100518754B1 KR10-2001-0043795A KR20010043795A KR100518754B1 KR 100518754 B1 KR100518754 B1 KR 100518754B1 KR 20010043795 A KR20010043795 A KR 20010043795A KR 100518754 B1 KR100518754 B1 KR 100518754B1
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- stainless steel
- steel sheet
- rolling
- cold rolling
- rolling mill
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- 238000005096 rolling process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 12
- 238000005097 cold rolling Methods 0.000 claims abstract description 62
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 37
- 239000010935 stainless steel Substances 0.000 claims abstract description 37
- 238000000137 annealing Methods 0.000 claims abstract description 12
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 13
- 229910000734 martensite Inorganic materials 0.000 description 11
- 239000007789 gas Substances 0.000 description 8
- 230000007547 defect Effects 0.000 description 6
- 230000009466 transformation Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- 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
- B21B1/26—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 hot-rolling, e.g. Steckel hot mill
-
- 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
- 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
- B21B45/004—Heating the product
Abstract
본 발명은 텐덤냉간압연기를 이용하여 스테인레스강판을 온간압연하는 방법에 관한 것으로, 오스테나이트계 스테인레스강판 (10)을 일반강의 냉연설비인 다수개의 텐덤냉간압연기(20)를 이용하여 압연하는 과정에서 스테인레스강판의 냉간압하율을 증대시키기 위한 온간압연방법을 제공함에 있어서, 스테인레스강판(10)의 가공라인에 구비되어진 연속소둔로(30)로부터 공급되는 배가스를 분배배관(40)을 통해 텐덤냉간압연기(20)의 각 패스를 통과하는 스테인레스강판(10)으로 분사하여, 스테인레스강판(10)의 표면온도가 200∼300℃의 온도범위로 유지되는 과정에서 온간압연하므로써, 히팅장치의 설치에 따른 부대비용이 절감될 뿐만 아니라 뿐만 아니라, 스테인레스강판의 생산성이 증대됨은 물론 제조원가가 절감되게 한 것이다. The present invention relates to a method of warm rolling a stainless steel sheet using a tandem cold rolling mill, wherein the austenitic stainless steel sheet (10) is rolled in the process of rolling using a plurality of tandem cold rolling mills (20), which are cold rolling facilities of general steel. In providing a warm rolling method for increasing the cold reduction rate of the steel sheet, the tandem cold rolling mill (2) receives exhaust gas supplied from the continuous annealing furnace (30) provided in the processing line of the stainless steel sheet (10) through the distribution pipe (40). By injecting into the stainless steel sheet 10 passing through each pass of 20), and hot rolling in the process of maintaining the surface temperature of the stainless steel sheet 10 in the temperature range of 200 ~ 300 ℃, the additional cost of installing the heating device Not only is this reduction not only, the productivity of the stainless steel sheet is increased, but also the manufacturing cost is reduced.
Description
본 발명은 텐덤냉간압연기를 이용하여 스테인레스강판을 온간압연하는 방법에 관한 것으로, 특히 텐덤냉간압연기에 의해 압연되는 스테인레스강판을 연속소둔로로부터 공급되어지는 배가스를 이용하여 일정온도로 가열하면서 온간압연하여 냉간압하율을 극대화시킬 수 있도록 된 오스테나이트계 스테인레스강판의 연속온간압연 방법에 관한 것이다.The present invention relates to a method for warm rolling a stainless steel sheet using a tandem cold rolling mill, and in particular, a stainless steel sheet rolled by a tandem cold rolling mill using a flue gas supplied from a continuous annealing furnace, The present invention relates to a continuous hot rolling method of an austenitic stainless steel sheet capable of maximizing cold rolling rate.
일반적으로, 오스테나이트계 스테인레스강판(이하, 스테인레스강판이라 함)은 상온상태에서 냉간압연하는 경우 가공유기 마르텐사이트상이 형성되어 변형저항이 매우 높아지는 특징이 있지만, 생산성 증대 및 제조원가 절감의 목적으로 일반강의 냉연설비인 텐덤냉간압연기로 압연하게 된다. In general, austenitic stainless steel sheet (hereinafter referred to as stainless steel sheet) is characterized in that when cold-rolled at room temperature, a processed organic martensite phase is formed, so that the deformation resistance is very high. Rolling is performed in a tandem cold rolling mill, a cold rolling facility.
그러나, 텐덤냉간압연기을 이용하여 스테인레스강판을 냉간압연하는 과정은 예컨대, 마르텐사이트의 변형저항으로 인해 냉간압연율이 52％이하에 불과하므로, 박판(1.2t)으로의 압연작업이 불가능한 단점이 있다. However, the process of cold rolling a stainless steel sheet using a tandem cold rolling mill has a disadvantage in that, for example, the cold rolling rate is only 52% or less due to the deformation resistance of martensite, so that rolling work to the thin plate (1.2t) is impossible.
따라서, 일본 JP63010009-A(16.Jan.1988)에서는, 텐덤냉간압연기의 입측에 200℃이하로 유지되는 유도가열로나 직화로나 버너식로나 연소장치의 배가스제트분사방식의 가열장치를 부착하여 온간압연하는 방법이 제안된 바 있다. Therefore, in JP63010009-A (16.Jan.1988), induction heating furnaces, direct-fired furnaces, burner-type furnaces, or exhaust gas jet spraying heaters of the combustion apparatus are attached to the tandem cold rolling mill and kept warm. How to do this has been proposed.
또한, JP63010005-A에서는 텐더밀의 입측에 200℃이하로 유지되는 유도가열로나 직화로나 버너식로나 연소장치의 배가스 제트분사방식의 가열장치와 소형가열장치를 두 개 부착하여 온간압연하는 방법이 제안된 바 있다. In addition, JP63010005-A proposes a method of warm rolling by attaching two induction heating furnaces, a direct combustion furnace, a burner furnace, a flue gas jet injection type heating device, and a small heating device at the inlet side of the tender mill. There is a bar.
또한, 특허공개 JP93015905호에서는, 스테인레스강판의 냉간압연과정에서 직접 전기통전을 통해 600℃이하로 가열하면서 1패스압연하고, 다시 압연재를 200℃이하로 냉각하여 온간압연하는 방법이 제안된 바 있다. In addition, Patent Publication No. JP93015905 discloses a method of rolling in a single pass while heating to 600 ° C. or lower through direct electric current in the cold rolling process of a stainless steel sheet, and then cooling the rolled material to 200 ° C. or lower and warm rolling. .
그러나, 상기한 장치는 스테인레스강판의 온간압연하는 과정에서 별도의 히팅장치가 설치된 상태로서, 히팅장치의 설치비가 증대되어 투자비가 과다 소요될 뿐만 아니라, 텐덤냉간압연에 의한 냉간압하율이 기대에 미치지 않아 박판의 제조작업이 실질적으로 불가능한 문제점이 있었다.However, the above apparatus is a state in which a separate heating device is installed during the warm rolling process of the stainless steel sheet, the installation cost of the heating device is increased, not only the investment cost is excessive, but also the cold reduction rate by tandem cold rolling does not meet the expectations. There was a problem that the manufacturing operation of the thin plate is practically impossible.
이에, 본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 텐덤냉간압연기에 의해 압연되는 스테인레스강판을 연속소둔로로부터 공급되는 배가스를 이용하여 일정온도로 가열하면서 온간압연하여 냉간압하율을 극대화시킬 수 있도록 된 오스테나이트계 스테인레스강판의 연속온간압연 방법을 제공하는 데에 그 목적이 있다.Therefore, the present invention was devised to solve the problems as described above, by heating the stainless steel sheet rolled by the tandem cold rolling mill to a constant temperature using the exhaust gas supplied from the continuous annealing furnace to reduce the cold reduction rate The purpose is to provide a continuous hot rolling method of austenitic stainless steel sheet that can be maximized.
상기한 바의 목적을 달성하기 위한 본 발명은, 오스테나이트계 스테인레스강판을 일반강의 냉연설비인 다수개의 텐덤냉간압연기를 이용하여 압연하는 과정에서 스테인레스강판을 온간압연하여주는 방법을 제공함에 있어서, 스테인레스강판의 가공라인에 구비되어진 연속소둔로에서 공급되는 배가스를 분배배관을 통해 텐덤냉간압연기의 각 패스라인을 통과하는 스테인레스강판으로 분사하여, 스테인레스강판의 표면온도가 200∼300℃의 온도범위로 유지되는 과정에서 온간압연하는 것을 특징으로 하는 발명이다. In order to achieve the above object, the present invention provides a method for warmly rolling a stainless steel sheet in the course of rolling the austenitic stainless steel sheet using a plurality of tandem cold rolling mills which are cold rolling equipments of general steel. The exhaust gas supplied from the continuous annealing furnace provided in the processing line of the steel sheet is sprayed through the distribution pipe to the stainless steel sheet passing through each pass line of the tandem cold rolling mill, and the surface temperature of the stainless steel sheet is maintained at a temperature range of 200 to 300 ° C. The invention is characterized in that the warm rolling in the process.
이하, 본 발명에 따른 실시예를 첨부된 예시도면을 참고로하여 상세하게 설명하면 다음과 같다.Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 오스테나이트계 스테인레스강판의 텐덤 온간압연설비를 도시한 개략도로서, 오스테나이트계 스테인레스강판(10)을 일반강의 냉연설비인 다수개의 텐덤냉간압연기(20)를 이용하여 압연하는 과정에서 스테인레스강판을 온간압연하여주는 방법을 제공함에 있어서, 1 is a schematic view showing a tandem warm rolling facility of an austenitic stainless steel sheet according to the present invention, in which the austenitic stainless steel sheet 10 is rolled using a plurality of tandem cold rolling mills 20 which are cold rolling equipments of general steel. In providing a method of warm rolling stainless steel sheet in the process,
스테인레스강판(10)의 가공라인에 구비되어진 연속소둔로(30)에서 공급되는 배가스를 분배배관(40)을 통해 텐덤냉간압연기(20)의 각 패스라인을 통과하는 스테인레스강판(10)으로 분사하여, 스테인레스강판(10)의 표면온도가 200∼300℃의 온도범위로 유지되는 과정에서 온간압연하는 것을 특징으로 한다.The exhaust gas supplied from the continuous annealing furnace 30 provided in the processing line of the stainless steel plate 10 is sprayed to the stainless steel plate 10 passing through each pass line of the tandem cold rolling mill 20 through the distribution pipe 40. In the process of maintaining the surface temperature of the stainless steel plate 10 in the temperature range of 200 ~ 300 ℃ characterized in that the hot rolling.
먼저, 본 발명의 구성요소 중 스테인레스강판(10)과 텐덤냉간압연기(20)와 연속소둔로(30)는 종래기술과 기능상 동일하므로 자세한 설명은 생략하고, 다만 텐덤냉간압연기(20)의 각 패스라인에 연속소둔로(30)로부터 공급되는 배가스를 스테인레스강판(10)으로 분사하여주는 분배배관(40)이 장착되어 있다. First, among the components of the present invention, the stainless steel plate 10 and the tandem cold rolling mill 20 and the continuous annealing furnace 30 are the same as in the prior art, so detailed description thereof will be omitted, but each pass of the tandem cold rolling mill 20 will be omitted. The distribution pipe 40 for injecting the exhaust gas supplied from the continuous annealing furnace 30 to the stainless steel plate 10 in the line is mounted.
물론, 텐덤냉간압연기(20)는, 총 4∼5개 정도의 압연기로 이루어진 일반강의 냉간연압설비로서, 최초 텐덤냉간압연기(20)의 입측에 가열장치(50)가 구비되면서, 그 이후의 텐덤냉간압연기(20)의 입측에 각각의 분배배관(40)과 각각의 온도측정장치(60)가 장착됨은 당연하다. Of course, the tandem cold rolling mill 20 is a cold rolling mill of general steel consisting of a total of about 4 to 5 rolling mills, and the heating device 50 is provided at the entrance of the first tandem cold rolling mill 20, and the tandem thereafter. Naturally, each distribution pipe 40 and each temperature measuring device 60 are mounted on the inlet side of the cold rolling mill 20.
그리고, 스테인레스강판(10)의 표면온도를 200∼300℃의 온도범위로 한정시킨 이유는, 200℃이하의 온도에서는 냉간압연과정에서 가공유기 마르텐사이트가 많이 생성되므로 변형저항이 증대되어 냉간압하율이 저하되어, 텐덤냉간압연기(20)를 이용하여 박판제조가 불가능하기 때문이다.The reason why the surface temperature of the stainless steel plate 10 is limited to a temperature range of 200 to 300 ° C. is because a large amount of processed organic martensite is generated during cold rolling at a temperature of 200 ° C. or lower, so that the deformation resistance is increased and the cold rolling rate is increased. This is because it is lowered and thin plate manufacturing is impossible using the tandem cold rolling mill 20.
또, 스테인레스강판(10)의 표면온도가 300℃이상인 경우에는, 냉간압연유가 심하게 휘발되면서 윤활기능이 상실되어 스테인레스강판의 표면불량이 발생시키게 될 뿐만 아니라 스테인레스강판의 외표면에 산화스케일이 형성되어 압연과정에서 표면품질이 저하되기 때문이다. In addition, when the surface temperature of the stainless steel sheet 10 is 300 ℃ or more, the cold rolled oil is volatilized severely to lose the lubrication function and not only cause a surface defect of the stainless steel sheet, but also an oxide scale is formed on the outer surface of the stainless steel sheet This is because the surface quality is degraded during the rolling process.
그리고, 스테인레스강판(10)의 표면온도를 200∼300℃의 온도범위로 유지시키는 경우 냉간압하율이 증대되는 이유로는, 스테인레스강(10)의 가열온도(200∼ 300℃)에 압연과정에서 발생되는 온도가 추가되어 고온상태로 유지되므로, 마르텐사이트로의 변태가 억제되는 것으로 해석된다. In addition, when the surface temperature of the stainless steel plate 10 is maintained in the temperature range of 200 to 300 ° C., the reason why the cold reduction rate is increased is that in the rolling process at the heating temperature (200 to 300 ° C.) of the stainless steel 10. It is interpreted that the transformation to martensite is suppressed because the added temperature is maintained at a high temperature.
즉, 스테인레스강판(10)이 연속소둔로(30)의 배가스에 의해 200∼300℃의 온도범위로 가열된 상태에서 또다시 텐덤냉간압연기(20)의 압하과정에서 온도가 상승되므로써, 스테인레스강판(10)이 압연되는 순간 마르텐사이트로의 변태가 더욱 더 억제되어 냉간압하율이 증대되는 것으로 해석된다. That is, while the stainless steel plate 10 is heated to a temperature range of 200 to 300 ° C. by the exhaust gas of the continuous annealing furnace 30, the temperature is increased in the pressing process of the tandem cold rolling mill 20 again, thereby increasing the temperature of the stainless steel plate ( It is interpreted that the transformation to martensite is further suppressed at the moment when 10) is rolled up to increase the cold reduction rate.
[실시예] EXAMPLE
먼저, 스테인레스강판(10)의 가공라인 즉, 텐덤냉간압연기(20)의 각 패스라인에 각각의 분배배관(40)을 장착한 다음, 압연시편(STS304, 두께3.0㎜)을 가열장치(50)를 이용하여 대략 80∼310℃정도로 가열하였다.First, each distribution pipe 40 is mounted on the processing line of the stainless steel plate 10, that is, each pass line of the tandem cold rolling mill 20, and then the rolling specimen (STS304, thickness 3.0 mm) is heated to the heating device 50. It heated to about 80-310 degreeC using.
그런 다음, 텐덤냉간압연기(20)를 통과하는 압연시편에 분배배관(40)의 배가스를 분사하여 100∼340℃의 온도범위로 가열한 상태에서 냉간압하율 80％(0.6㎜)까지 압연한 다음, 압연시편을 1050℃의 온도범위를 유지하는 소둔로에서 2분내외로 소둔처리한 후 산세처리하고 표면결함여부를 육안으로 관찰하였다. Then, the exhaust gas of the distribution pipe 40 is sprayed on the rolling specimens passing through the tandem cold rolling mill 20 and rolled up to 80% (0.6 mm) in the cold rolling ratio under heating to a temperature range of 100 to 340 ° C. The rolled specimens were annealed for about 2 minutes in an annealing furnace maintaining a temperature range of 1050 ° C., followed by pickling and visually observed for surface defects.
이때, 표 1에서와 같이, 텐덤냉간압연기(20)를 통과하는 압연소재의 표면온도를 상온상태(20℃)로 유지하면서 냉간압연한 결과, 마르텐사이트의 변태율이 75％에 이르므로, 냉간압하율을 80％까지 도달시키기 위해서는 압연공정이 15회정도 요구되어 텐덤냉간압연기(20)의 사용이 불가능함을 알 수 있었다. At this time, as shown in Table 1, the cold rolling while maintaining the surface temperature of the rolled material passing through the tandem cold rolling mill 20 at room temperature (20 ℃), the transformation rate of martensite reaches 75%, cold In order to reach the reduction ratio to 80%, it was found that the rolling process was required about 15 times, so that the use of the tandem cold rolling mill 20 was impossible.
[표 1] 온간압연 시험결과(압연소재:STS 304. 두께:3.0㎜)[Table 1] Warm rolling test results (rolled material: STS 304. thickness: 3.0㎜)
반면에, 텐덤냉간압연기(20)를 통과하는 압연소재의 표면온도를 200∼300℃의 온도범위로 가열하여 냉간압연한 결과, 마르텐사이트로 거의 변태되지 않아 냉간압하율을 80％까지 도달시키기 위해 대략 5회정도의 압연공정이 필요하므로, 텐덤냉간압연기의 사용이 가능함을 알 수 있었다. On the other hand, as a result of cold rolling by heating the surface temperature of the rolled material passing through the tandem cold rolling mill 20 to a temperature range of 200 to 300 ° C., it is hardly transformed into martensite to reach the cold reduction rate of 80%. Since about five rolling processes are required, it can be seen that a tandem cold rolling mill can be used.
한편, 텐덤냉간압연기(20)를 통과하는 압연소재의 표면온도를 200℃이하의 온도로 유지하면서 냉간압연한 결과, 마르텐사이트로 50％정도 변태되어 냉간압하율을 80％까지 도달시키기 위해 10회정도의 압연공정이 필요하므로, 텐덤냉간압연기의 사용이 불가능함을 알 수 있었다. On the other hand, as a result of cold rolling while maintaining the surface temperature of the rolled material passing through the tandem cold rolling mill 20 at a temperature of 200 ° C. or less, it is transformed by about 50% to martensite and 10 times to reach the cold reduction rate to 80%. As a rolling process is required, it was found that the use of the tandem cold rolling mill was impossible.
또한, 텐덤냉간압연기(20)를 통과하는 압연소재의 표면온도를 300℃이상의 온도로 유지하면서 냉간압연한 결과, 마르텐사이트로 거의 변태되지 않아 냉간압하율율을 80％까지 도달하기 위해 5회정도의 압연공정이 필요하므로, 텐덤냉간압연기의 사용이 가능함을 알 수 있었다.In addition, as a result of cold rolling while maintaining the surface temperature of the rolled material passing through the tandem cold rolling mill 20 at a temperature of 300 ° C. or more, it is hardly transformed into martensite, so that the cold rolling reduction rate is about 5 times. Since the rolling process is necessary, it can be seen that the use of a tandem cold rolling mill is possible.
그렇지만, 압연소재의 표면온도를 300℃이상의 온도로 유지되는 경우, 압연소재표면을 육안으로 관찰한 결과 표면결함이 다량 발생됨을 알 수 있었다. 이는 압연소재에 공급되는 냉간압연유가 휘발됨으로 인해 산화스케일이 형성되어 표면품질을 저하시키기 때문인 것으로 생각된다. However, when the surface temperature of the rolled material is maintained at a temperature of 300 ℃ or more, the surface of the rolled material was observed visually, it can be seen that a large amount of surface defects. This is considered to be due to the formation of an oxide scale due to volatilization of the cold rolled oil supplied to the rolled material.
따라서, 텐덤냉간압연기(20)를 통과하는 압연소재의 표면온도를 200∼300℃의 온도범위로 유지하면서 냉간압연한 경우, 마르텐사이트로 거의 변태되지 않아 5회정도의 압연공정으로 냉간압하율이 80％까지 가능함은 물론, 압연소재의 표면을 육안으로 관찰한 결과 결함이 거의 발생하지 않음을 알 수 있었다.Therefore, when cold rolling is performed while maintaining the surface temperature of the rolled material passing through the tandem cold rolling mill 20 in the temperature range of 200 to 300 ° C., the cold rolling reduction rate is reduced by about five times in the rolling process because it hardly transforms into martensite. As well as being possible up to 80%, the visual observation of the surface of the rolled material showed that almost no defects.
이상에서 설명한 바와 같이 본 발명에 따른 오스테나이트계 스테인레스강판의 연속온간압연 방법에 의하면, 스테인레스강판의 제조라인에 별도의 히팅장치를 설치하지 않은 상태에서도 냉간압연율이 80％까지 도달됨은 물론 냉간압연후 표면결함이 거의 발생되지 않게 되므로, 히팅장치의 설치에 따른 부대비용이 절감될 뿐만 아니라 뿐만 아니라, 일반강의 냉연설비인 텐덤냉간압연기를 이용하여 박판으로의 제조가 가능하므로, 스테인레스강판의 생산성이 증대됨은 물론 제조원가가 절감되는 효과가 있는 것이다. As described above, according to the continuous hot rolling method of the austenitic stainless steel sheet according to the present invention, the cold rolling ratio reaches 80% as well as the cold rolling even when no heating device is installed in the production line of the stainless steel sheet. Since the surface defects hardly occur afterwards, not only the additional cost of installing the heating apparatus is reduced, but also the manufacturing of the thin plate using the tandem cold rolling mill, which is a cold rolling facility of general steel, enables the productivity of the stainless steel sheet. Of course, manufacturing costs are reduced.
도 1은 본 발명에 따른 오스테나이트계 스테인레스강판의 텐덤 온간압연설비를 도시한 개략도이다.1 is a schematic diagram showing a tandem warm rolling facility of an austenitic stainless steel sheet according to the present invention.
* 도면 중 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
10 : 스테인레스강판 20 : 텐덤냉간압연기10: stainless steel sheet 20: tandem cold rolling mill
30 : 연속소둔로 40 : 분배배관30: continuous annealing furnace 40: distribution piping
50 : 가열장치 60 : 온도측정장치50: heating device 60: temperature measuring device
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|---|---|---|---|---|
| JPS6310009A (en) * | 1986-06-27 | 1988-01-16 | Kawasaki Steel Corp | Continuous warm rolling method for stainless steel strip and its equipment |
| JPH0352702A (en) * | 1989-07-19 | 1991-03-06 | Kawasaki Steel Corp | Warm rolling equipment for stainless steel strip |
| JPH0381009A (en) * | 1989-08-23 | 1991-04-05 | Kawasaki Steel Corp | Method for controlling plate temperature in warm rolling of stainless steel strip |
| JPH06154807A (en) * | 1992-11-20 | 1994-06-03 | Sumitomo Metal Ind Ltd | Method for rolling stainless steel trip |
| JPH09103803A (en) * | 1995-10-09 | 1997-04-22 | Sumitomo Metal Ind Ltd | Warm rolling method of austenitic stainless steel sheet |
| JPH09168802A (en) * | 1995-12-20 | 1997-06-30 | Sumitomo Metal Ind Ltd | Continuous warm rolling mill of stainless steel strip |
| KR20000042187A (en) * | 1998-12-24 | 2000-07-15 | 이구택 | Method of manufacturing thin steel plate by strip casting of cr/v added steel |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6310009A (en) * | 1986-06-27 | 1988-01-16 | Kawasaki Steel Corp | Continuous warm rolling method for stainless steel strip and its equipment |
| JPH0352702A (en) * | 1989-07-19 | 1991-03-06 | Kawasaki Steel Corp | Warm rolling equipment for stainless steel strip |
| JPH0381009A (en) * | 1989-08-23 | 1991-04-05 | Kawasaki Steel Corp | Method for controlling plate temperature in warm rolling of stainless steel strip |
| JPH06154807A (en) * | 1992-11-20 | 1994-06-03 | Sumitomo Metal Ind Ltd | Method for rolling stainless steel trip |
| JPH09103803A (en) * | 1995-10-09 | 1997-04-22 | Sumitomo Metal Ind Ltd | Warm rolling method of austenitic stainless steel sheet |
| JPH09168802A (en) * | 1995-12-20 | 1997-06-30 | Sumitomo Metal Ind Ltd | Continuous warm rolling mill of stainless steel strip |
| KR20000042187A (en) * | 1998-12-24 | 2000-07-15 | 이구택 | Method of manufacturing thin steel plate by strip casting of cr/v added steel |
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