KR20020016906A - 박강판 및 그 제조방법 - Google Patents
박강판 및 그 제조방법 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 312
- 239000010959 steel Substances 0.000 title claims abstract description 312
- 238000004519 manufacturing process Methods 0.000 title claims description 43
- 239000002244 precipitate Substances 0.000 claims abstract description 108
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 96
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000002245 particle Substances 0.000 claims abstract description 73
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 57
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 52
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 51
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 44
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 37
- 229910052742 iron Inorganic materials 0.000 claims abstract description 36
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims description 95
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 41
- 229910052725 zinc Inorganic materials 0.000 claims description 41
- 239000011701 zinc Substances 0.000 claims description 41
- 230000008569 process Effects 0.000 claims description 40
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- 239000010960 cold rolled steel Substances 0.000 claims description 26
- 238000005246 galvanizing Methods 0.000 claims description 26
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- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/004—Dispersions; Precipitations
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0273—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
Claims (41)
- 입도번호 10 이상의 페라이트 입자와 페라이트 입계를 갖는 페라이트 상;상기 페라이트 상에 함유되는 Nb계 석출물과 Ti계 석출물로 이루어지는 그룹에서 선택된 적어도 1종의 석출물;상기 페라이트 입자는 입계근방의 석출물 밀도가 낮은 저밀도 영역을 가지며;상기 저밀도 영역은 페라이트 입자 중앙부의 석출물 밀도의 60% 이하인 석출물 밀도를 갖는 박강판.
- 제 1 항에 있어서,상기 저밀도 영역이 페라이트 입계에서 0.2㎛ 이상 2.4㎛ 이하의 범위인 박강판.
- 제 1 항에 있어서,10MPa 이하인 BH 양을 더 갖는 박강판.
- 제 1 항에 있어서,상기 박강판이 실질적으로,mass%로 C:0.002~0.02%, Si:1% 이하, Mn:3% 이하, P:0.1% 이하, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.007% 이하를 함유하며, Nb:0.01~0.4%와 Ti:0.005~0.3%로 이루어지는 그룹에서 선택된 적어도 하나를 함유하고, 잔부가 철로 이루어지는 박강판.
- 제 4 항에 있어서,C 함유량이 0.005~0.01%인 박강판.
- 제 4 항에 있어서,Nb 함유량이 0.04~0.14%인 박강판.
- 제 4 항에 있어서,Nb 함유량이 0.07~0.14%인 박강판.
- 제 4 항에 있어서,Ti 함유량이 0.005~0.05%인 박강판.
- 제 1 항에 있어서,상기 박강판이 실질적으로,mass%로 C:0.002~0.02%, Si:1% 이하, Mn:3% 이하, P:0.1% 이하, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.007% 이하, B:0.002% 이하를 함유하며, Nb:0.01~0.4%와Ti:0.005~0.3%로 이루어지는 그룹에서 선택된 적어도 하나를 함유하고, 잔부가 철로 이루어지는 박강판.
- 제 9 항에 있어서,B 함유량이 0.001% 이하인 박강판
- 제 1 항에 있어서,mass%로 C:0.002~0.02%, Si:1% 이하, Mn:3% 이하, P:0.1% 이하, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.007% 이하를 함유하며, Nb:0.01~0.4%와 Ti:0.005~0.3%로 이루어지는 그룹에서 선택된 적어도 하나를 함유하고, 잔부가 실질적으로 철로 이루어지는 슬라브를 열간압연하고, 열연강판으로 하는 공정;상기 열연판을 적어도 750℃ 이하의 온도까지 10℃/sec 이상의 냉각속도로 냉각하는 공정;냉각된 열연강판을 권취하는 공정;권취된 열연판을 냉간압연하고, 냉연강판으로 하는 공정;과상기 냉연판을 소둔하는 공정으로 이루어지는 박강판의 제조방법.
- 제 11 항에 있어서,상기 슬라브가 실질적으로,mass%로 C:0.002~0.02%, Si:1% 이하, Mn:3% 이하, P:0.1% 이하, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.007% 이하, B:0.002% 이하를 함유하며, Nb:0.01~0.4%와 Ti:0.005~0.3%로 이루어지는 그룹에서 선택된 적어도 하나를 함유하고, 잔부가 실질적으로 철로 이루어지는 박강판의 제조방법.
- 제 11 항에 있어서,권취된 열연판의 페라이트 입경이 입도번호로 11.2 이상인 박강판의 제조방법.
- 제 11 항에 있어서,열연판을 권취하는 공정이 500-700℃의 권취온도에서 열연강판을 권취하는 것으로 이루어지는 박강판의 제조방법.
- 제 11 항에 있어서,열연강판을 냉간압연하는 공정이 많아도 85%의 냉간압하율로 냉간압연하는 것으로 이루어지는 박강판의 제조방법.
- 제 11 항에 있어서,냉연강판을 열처리하는 공정이 재결정 온도 이상 또한 900℃ 이하의 온도에서 연속소둔 하는 것으로 이루어지는 박강판의 제조방법.
- mass%로 C:0.004~0.02%, Si:1.0% 이하, Mn:0.7~3.0%, P:0.02~0.15%, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.004% 이하, Nb:0.2% 이하 잔부가 실질적으로 철로 이루어지며:Nb 함유량이 다음의 식을 만족하고,(12/93)×Nb*/C≥1.0단, Nb*=Nb-(93/14)×NC, N, Nb:각각의 원소 함유량(mass%)항복강도 및 페라이트 평균입경이 다음의 식을 만족하는 박강판.YP≤-120×d+1280단, YP는 항복강도[MPa], d는 페라이트 평균입경[㎛]을 각각 나타낸다
- 제 17 항에 있어서,단축(單軸)인장 시험에 의한 10% 이하의 변형에서의 n값이 다음의 식을 만족하는 박강판.n값≥-0.00029×TS+0.313단, TS는 인장강도[MPa]를 나타낸다.
- 제 17 항에 있어서,C 함유량이 0.005~0.008%인 박강판.
- 제 17 항에 있어서,Nb 함유량이 0.08~0.14%인 박강판.
- 제 17 항에 있어서,0.05% 이하의 Ti를 더 갖는 박강판.
- 제 17 항에 있어서,0.002% 이하의 B를 더 갖는 박강판.
- 제 17 항에 있어서,0.05% 이하의 Ti와 0.002% 이하의 B를 더 갖는 박강판.
- 제 17 항에 있어서,Cr:1.0% 이하, Mo:1.0% 이하, Ni:1.0% 이하, Cu:1.0% 이하의 그룹에서 선택된 적어도 하나를 더 함유하는 박강판.
- 제 17 항에 있어서,상기 박강판의 표면에 아연도금 피막을 갖는 박강판.
- mass%로 C:0.004~0.02%, Si:1.0% 이하, Mn:0.7~3.0%, P:0.02~0.15%, S:0.02%이하, sol.Al:0.01~0.1%, N:0.004% 이하, Nb:0.035~0.2% 잔부가 실질적으로 철로 이루어지는 슬라브를 Ar3 변태점 이상의 사상온도에서 열간압연하는 공정;열간압연 후의 열연강판을 500~700℃에서 권취하는 공정;권취된 강판을 냉간압연하는 공정;과냉연강판을 소둔하는 공정으로 이루어지는 박강판의 제조방법.
- 제 26 항에 있어서,소둔 후의 강판을 아연계 도금 처리하는 공정을 더 갖는 박강판의 제조방법.
- 제 26 항에 있어서,상기 슬라브가 0.05% 이하의 Ti를 더 함유하는 박강판의 제조방법.
- 제 26 항에 있어서,상기 슬라브가 0.002% 이하의 B를 더 함유하는 박강판의 제조방법.
- 제 26 항에 있어서,0.05% 이하의 Ti와 0.002% 이하의 B를 더 갖는 박강판의 제조방법.
- mass%로 C:0.0040~0.02%, Si:1.0% 이하, Mn:0.1~1.0%, P:0.01~0.07%, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.004% 이하, Nb:0.15% 이하 잔부가 실질적으로 철로 이루어지며:Nb 함유량이 다음의 식을 만족하고;(12/93)×Nb*/C≥1.2단, Nb*=Nb-(93/14)×NC, N, Nb:각각의 원소 함유량(mass%)항복강도 및 페라이트 평균입경이 다음의 식을 만족하는 박강판.YP≤-60×d+770;단, YP는 항복강도[MPa], d는 페라이트 평균입경[㎛]을 각각 나타낸다.
- 제 31 항에 있어서,C 함유량이 0.005~0.008%인 박강판.
- 제 31 항에 있어서,Nb 함유량이 0.08~0.14%인 박강판.
- 제 31 항에 있어서,단축인장 시험에 의한 10% 이하의 변형에서의 n값이 0.21 이상인 박강판.
- 제 31 항에 있어서,0.05% 이하의 Ti를 더 갖는 박강판.
- 제 31 항에 있어서,0.002% 이하의 B를 더 갖는 박강판.
- 제 31 항에 있어서,0.05% 이하의 Ti와 0.002% 이하의 B를 더 갖는 박강판.
- 제 31 항에 있어서,Cr:1.0% 이하, Mo:1.0% 이하, Ni:1.0% 이하, Cu:1.0% 이하의 그룹에서 선택된 적어도 하나를 함유하는 박강판.
- 제 31 항에 있어서,상기 박강판의 표면에 아연계 도금피막을 갖는 박강판.
- mass%로 C:0.004~0.02%, Si:1.0% 이하, Mn:0.1~1.0%, P:0.01~0.07%, S:0.02% 이하, sol.Al:0.01~0.1%, N:0.004% 이하, Nb:0.035~0.15% 잔부가 실질적으로 철로 이루어지는 슬라브를 Ar3 변태점 이상의 사상온도로 열간압연하는 공정;열간압연 후의 강판을 500~700℃에서 권취하는 공정;권취된 열연강판을 냉간압연하는 공정;과냉연강판을 소둔하는 공정으로 이루어지는 박강판의 제조방법.
- 제 40 항에 있어서,소둔 후의 강판을 아연계 도금처리하는 공정을 더 갖는 박강판의 제조방법.
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JP2000183870A JP2002003993A (ja) | 2000-06-20 | 2000-06-20 | 高強度薄鋼板および高強度亜鉛系めっき鋼板 |
JPJP-P-2000-00183871 | 2000-06-20 | ||
JP2000183871A JP2002003994A (ja) | 2000-06-20 | 2000-06-20 | 高強度薄鋼板および高強度亜鉛系めっき鋼板 |
JPJP-P-2000-00183870 | 2000-06-20 | ||
JPJP-P-2000-00195437 | 2000-06-29 | ||
JP2000195438A JP2002012946A (ja) | 2000-06-29 | 2000-06-29 | 高強度薄鋼板およびその製造方法 |
JP2000195437A JP2002012945A (ja) | 2000-06-29 | 2000-06-29 | 高強度薄鋼板およびその製造方法 |
JPJP-P-2000-00195438 | 2000-06-29 | ||
JP2000198652A JP4214664B2 (ja) | 2000-06-30 | 2000-06-30 | プレス成形用薄鋼板およびその製造方法 |
JPJP-P-2000-00198652 | 2000-06-30 |
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EP (3) | EP2312009A1 (ko) |
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CN1286999C (zh) | 2006-11-29 |
EP2312010A1 (en) | 2011-04-20 |
EP1318205A1 (en) | 2003-06-11 |
US6743306B2 (en) | 2004-06-01 |
CN1560310A (zh) | 2005-01-05 |
EP1318205A4 (en) | 2005-08-03 |
US7252722B2 (en) | 2007-08-07 |
KR100473497B1 (ko) | 2005-03-09 |
EP2312009A1 (en) | 2011-04-20 |
CN1383459A (zh) | 2002-12-04 |
US20040168753A1 (en) | 2004-09-02 |
WO2001098552A1 (en) | 2001-12-27 |
CN1190513C (zh) | 2005-02-23 |
US20020148536A1 (en) | 2002-10-17 |
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