KR20000038834A - 표면 균열이 없는 2상 스테인레스 열연강판의 제조방법 - Google Patents
표면 균열이 없는 2상 스테인레스 열연강판의 제조방법 Download PDFInfo
- Publication number
- KR20000038834A KR20000038834A KR1019980053962A KR19980053962A KR20000038834A KR 20000038834 A KR20000038834 A KR 20000038834A KR 1019980053962 A KR1019980053962 A KR 1019980053962A KR 19980053962 A KR19980053962 A KR 19980053962A KR 20000038834 A KR20000038834 A KR 20000038834A
- Authority
- KR
- South Korea
- Prior art keywords
- rolling
- temperature
- phase
- producing
- phase stainless
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000005098 hot rolling Methods 0.000 title abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 122
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 19
- 239000010935 stainless steel Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 15
- 230000001186 cumulative effect Effects 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 238000003303 reheating Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 230000000881 depressing effect Effects 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 description 16
- 238000005336 cracking Methods 0.000 description 11
- 229910001566 austenite Inorganic materials 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004148 unit process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001035 Soft ferrite Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910000658 steel phase Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- B21B2001/225—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 hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/16—Two-phase or mixed-phase rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/14—Reduction rate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims (5)
- 중량%로, Cr: 21-24%, Ni: 4.5-6.5%, Mo: 2.5-3.5%, N: 0.08-2%, 및 S: 0.03% 이하를 함유하는 2상 스테인레스 열연강판을 제조하는 방법에 있어서,상기 2상 스테인레스 강 슬라브를 1200-1260℃로 가열로에서 재가열한 뒤 소재온도 900-1260℃, 누적압하율 60% 이내의 구간에서 한개 또는 복수개의 스탠드에서 각 압연단계별로 하기 식(1)에 의해서 구해지는 압하율(Ri)로, 그리고 하기 식(2)에 의해서 구해지는 변형률속도(SRi)가 하기 식(3)을 만족하도록 압연롤 속도(Vi)를 제어하여 압연을 행한 후,(수학식 1)
Ri≤a×TRi+b a,b : 실제압연에 의해 결정되는 상수Ri : i 번째 압연시 압하율TRj : i 번째 압연완료후의 누적압하율(수학식 2)SRi : 변형률속도(S-1)Vi : 압연롤 속도Ei : 변형률ri : 압연롤 반경Hi : 소재 입측두께(수학식 3)SRi≤c×TRi+d c,d : 실제압연에 의해 결정되는 상수SRi : i 번째압연시 변형률 속도TRi : i 번째 압연 완료후의 누적압하율900℃이상의 온도에서 최종 두께로 압연을 행한 다음, 통상의 방법으로 권취하는 표면에 균열이 없는 2상 스테인레스 열연강판의 제조방법 - 제1항에 있어서, a는 1/6<a<1/3 이고, b는 5< b<10이고, c는 1/60<c<4/60 이고, 그리고 d는 4< d<6 인 것을 특징으로 하는 표면에 균열이 없는 2상 스테인레스 열연강판의 제조방법
- 제2항에 있어서, a는 0.267이고, b는 7.0이고, c는 0.05이고, 그리고 d는 2.0인 것을 특징으로 하는 표면에 균열이 없는 2상 스테인레스 열연강판의 제조방법
- 제1항에서 제3항중의 어느 한 항에 있어서, 권취가 600℃미만의 온도범위에서 행해진 후 공냉하는 것을 특징으로 하는 표면에 균열이 없는 2상 스테인레스 열연강판의 제조방법
- 제1항에서 제3항중의 어느 한 항에 있어서, 권취가 700℃미만의 온도범위에서 행해진 후 급냉하는 것을 특징으로 하는 표면에 균열이 없는 2상 스테인레스 열연강판의 제조방법
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-1998-0053962A KR100362663B1 (ko) | 1998-12-09 | 1998-12-09 | 표면 균열이 없는 2상 스테인레스 열연강판의 제조방법 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-1998-0053962A KR100362663B1 (ko) | 1998-12-09 | 1998-12-09 | 표면 균열이 없는 2상 스테인레스 열연강판의 제조방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20000038834A true KR20000038834A (ko) | 2000-07-05 |
KR100362663B1 KR100362663B1 (ko) | 2003-02-19 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR10-1998-0053962A KR100362663B1 (ko) | 1998-12-09 | 1998-12-09 | 표면 균열이 없는 2상 스테인레스 열연강판의 제조방법 |
Country Status (1)
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KR (1) | KR100362663B1 (ko) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020040428A (ko) * | 2000-11-24 | 2002-05-30 | 이구택 | 냉간압연기의 압연율 결정방법 |
KR100479778B1 (ko) * | 2000-08-30 | 2005-03-30 | 닛꼬 긴조꾸 가꼬 가부시키가이샤 | 내낙하충격변형성 및 저열팽창성 철-니켈계 합금재의열간압연균열을 방지하는 제조방법 |
KR100756394B1 (ko) * | 2007-07-02 | 2007-09-10 | 포스코신기술연구조합 | 페라이트-오스테나이트 2상조직을 갖는 스테인레스강주조재의 열간단조 방법 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103286128B (zh) * | 2013-05-30 | 2015-05-20 | 山西太钢不锈钢股份有限公司 | 一种超级双相不锈钢s32750中板轧制工艺 |
CN106391704A (zh) * | 2016-11-23 | 2017-02-15 | 东北大学 | 一种消除2205双相不锈钢中板热加工表面裂纹的方法 |
-
1998
- 1998-12-09 KR KR10-1998-0053962A patent/KR100362663B1/ko not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100479778B1 (ko) * | 2000-08-30 | 2005-03-30 | 닛꼬 긴조꾸 가꼬 가부시키가이샤 | 내낙하충격변형성 및 저열팽창성 철-니켈계 합금재의열간압연균열을 방지하는 제조방법 |
KR20020040428A (ko) * | 2000-11-24 | 2002-05-30 | 이구택 | 냉간압연기의 압연율 결정방법 |
KR100756394B1 (ko) * | 2007-07-02 | 2007-09-10 | 포스코신기술연구조합 | 페라이트-오스테나이트 2상조직을 갖는 스테인레스강주조재의 열간단조 방법 |
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Publication number | Publication date |
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KR100362663B1 (ko) | 2003-02-19 |
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