JP5450618B2 - 表面特性及び耐2次加工脆性に優れた焼付硬化鋼及びその製造方法 - Google Patents
表面特性及び耐2次加工脆性に優れた焼付硬化鋼及びその製造方法 Download PDFInfo
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- JP5450618B2 JP5450618B2 JP2011516115A JP2011516115A JP5450618B2 JP 5450618 B2 JP5450618 B2 JP 5450618B2 JP 2011516115 A JP2011516115 A JP 2011516115A JP 2011516115 A JP2011516115 A JP 2011516115A JP 5450618 B2 JP5450618 B2 JP 5450618B2
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- 229910000760 Hardened steel Inorganic materials 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 105
- 239000010959 steel Substances 0.000 claims description 105
- 239000013078 crystal Substances 0.000 claims description 52
- 229910052698 phosphorus Inorganic materials 0.000 claims description 38
- 229910052799 carbon Inorganic materials 0.000 claims description 33
- 238000005096 rolling process Methods 0.000 claims description 28
- 238000004804 winding Methods 0.000 claims description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims description 26
- 238000000137 annealing Methods 0.000 claims description 25
- 229910052782 aluminium Inorganic materials 0.000 claims description 22
- 238000005098 hot rolling Methods 0.000 claims description 22
- 229910052748 manganese Inorganic materials 0.000 claims description 19
- 229910052719 titanium Inorganic materials 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 14
- 238000005097 cold rolling Methods 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 229910052758 niobium Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- DBIMSKIDWWYXJV-UHFFFAOYSA-L [dibutyl(trifluoromethylsulfonyloxy)stannyl] trifluoromethanesulfonate Chemical compound CCCC[Sn](CCCC)(OS(=O)(=O)C(F)(F)F)OS(=O)(=O)C(F)(F)F DBIMSKIDWWYXJV-UHFFFAOYSA-L 0.000 claims 3
- 230000032683 aging Effects 0.000 description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 34
- 239000006104 solid solution Substances 0.000 description 29
- 230000000694 effects Effects 0.000 description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- 238000000034 method Methods 0.000 description 24
- 230000007547 defect Effects 0.000 description 23
- 239000000463 material Substances 0.000 description 22
- 239000011572 manganese Substances 0.000 description 16
- 230000006866 deterioration Effects 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 238000007747 plating Methods 0.000 description 11
- 239000002244 precipitate Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 230000007423 decrease Effects 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 238000009628 steelmaking Methods 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 229910000655 Killed steel Inorganic materials 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 230000003679 aging effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910002066 substitutional alloy Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0436—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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0473—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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/04—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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/03—Amorphous or microcrystalline structure
Description
P≦−0.048*loge(Al)−0.07
DBTT=803P−24.4Mn−58≦−30(℃)
P≦−0.048*loge(Al)−0.07
DBTT=803P−24.4Mn−58≦−30(℃)
Claims (6)
- 重量%で、C:0.0016〜0.0025%、Si:0.02%以下、Mn:0.2〜1.2%、P:0.01〜0.04%、S:0.01%以下、Al:0.08〜0.12%、N:0.0025%以下、Ti:0.003%以下、Nb:0.003〜0.011%、Mo:0.01〜0.1%、及びB:0.0005〜0.0015%、並びに残部Fe及びその他の不可避不純物からなり、
前記MnとPは、
DBTT=803P−24.4Mn−58≦−30(℃)
の関係を満たし、かつ、
前記Al及びPは
P≦−0.048*loge(Al)−0.07
の関係を満たす、焼付硬化鋼。 - 前記焼付硬化鋼の結晶粒のサイズは、ASTM No.9以上である、請求項1に記載の焼付硬化鋼。
- 重量%で、C:0.0016〜0.0025%、Si:0.02%以下、Mn:0.2〜1.2%、P:0.01〜0.04%、S:0.01%以下、Al:0.08〜0.12%、N:0.0025%以下、Ti:0.003%以下(0を除く)、Nb:0.003〜0.011%、Mo:0.01〜0.1%、及びB:0.0005〜0.0015%、並びに残部Fe及びその他の不可避不純物からなり、前記MnとPは、DBTT=803P−24.4Mn−5≦−30(℃)の関係を満たす鋼スラブを、1200℃以上の温度で加熱する加熱段階と、
900〜950℃で熱間仕上げ圧延する熱間圧延段階と、
前記熱間圧延された鋼板を巻取する巻取段階と、
空冷後にスケールを除去してから70〜80%の圧下率で冷間圧延する冷間圧延段階と、
750〜830℃で連続焼鈍する焼鈍段階と、
1.2〜1.5%の圧下率で調質圧延する調質圧延段階
とを含む、焼付硬化鋼の製造方法。 - 前記巻取段階は、前記AlとPが、P≦−0.048*loge(Al)−0.07の関係を満たしながら、600〜650℃で行われる、請求項3に記載の焼付硬化鋼の製造方法。
- 前記巻取段階は、600℃以下の温度で行われる、請求項3に記載の焼付硬化鋼の製造方法。
- 重量%で、C:0.0016〜0.0025%、Si:0.02%以下、Mn:0.2〜1.2%、P:0.01〜0.04%、S:0.01%以下、Al:0.08〜0.12%、N:0.0025%以下、Ti:0.003%以下、Nb:0.003〜0.011%、Mo:0.01〜0.1%、及びB:0.0005〜0.0015%、並びに残部Fe及びその他の不可避不純物からなり、前記MnとPは、DBTT=803P−24.4Mn−58≦−30(℃)の関係を満たす鋼スラブを、1200℃以上の温度で加熱する加熱段階と、
900〜950℃で熱間仕上げ圧延する熱間圧延段階と、
600〜650℃で巻取する巻取段階と、
巻取後30分以内に水冷してからスケールを除去し、70〜80%の圧下率で冷間圧延する冷間圧延段階と、
750〜830℃で連続焼鈍する焼鈍段階と、
1.2〜1.5%の圧下率で調質圧延する調質圧延段階
とを含む、焼付硬化鋼の製造方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20080059281 | 2008-06-23 | ||
KR10-2008-0059281 | 2008-06-23 | ||
KR20090049398A KR101105040B1 (ko) | 2008-06-23 | 2009-06-04 | 표면특성 및 내2차 가공취성이 우수한 소부경화강 및 그 제조방법 |
KR10-2009-0049398 | 2009-06-04 | ||
PCT/KR2009/003093 WO2009157661A2 (ko) | 2008-06-23 | 2009-06-09 | 표면특성 및 내2차 가공취성이 우수한 소부경화강 및 그 제조방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011525569A JP2011525569A (ja) | 2011-09-22 |
JP5450618B2 true JP5450618B2 (ja) | 2014-03-26 |
Family
ID=41691983
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JP2011516115A Active JP5450618B2 (ja) | 2008-06-23 | 2009-06-09 | 表面特性及び耐2次加工脆性に優れた焼付硬化鋼及びその製造方法 |
Country Status (3)
Country | Link |
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US (1) | US9011615B2 (ja) |
JP (1) | JP5450618B2 (ja) |
KR (1) | KR101105040B1 (ja) |
Families Citing this family (1)
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JP6606906B2 (ja) * | 2015-07-30 | 2019-11-20 | 日本製鉄株式会社 | 合金化溶融亜鉛めっき鋼板およびその製造方法 |
Family Cites Families (12)
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JPS6046166B2 (ja) | 1980-11-26 | 1985-10-15 | 川崎製鉄株式会社 | 焼付硬化性を有する良加工性冷延鋼板の製造方法 |
JPS6126757A (ja) | 1984-07-17 | 1986-02-06 | Kawasaki Steel Corp | 焼付硬化性を有する深絞り用冷延鋼板 |
JP2910497B2 (ja) | 1993-04-21 | 1999-06-23 | 日本鋼管株式会社 | 焼付硬化性に優れた加工用冷延鋼板及び表面処理鋼板 |
JP3140289B2 (ja) | 1994-04-08 | 2001-03-05 | 新日本製鐵株式会社 | 成形加工性に優れ、塗装焼付け硬化性を有し、かつ幅方向の塗装焼付け硬化性の変動の少ない自動車用高強度冷延鋼板の製造方法 |
JPH0849038A (ja) | 1994-08-04 | 1996-02-20 | Kobe Steel Ltd | 深絞り性の優れた焼付硬化型冷延鋼板およびその製造方法 |
JP3304747B2 (ja) | 1996-03-14 | 2002-07-22 | 日本鋼管株式会社 | 焼付硬化性と延性および常温時効性とのバランスに優れた冷延鋼板ならびにその製造方法 |
JP3855678B2 (ja) * | 2000-04-28 | 2006-12-13 | 住友金属工業株式会社 | 耐常温時効性、加工性、塗装焼付硬化性に優れた薄鋼板の製造方法 |
KR100564884B1 (ko) | 2003-12-30 | 2006-03-30 | 주식회사 포스코 | 상온 내시효성과 2차 가공취성이 우수한 소부경화형냉간압연강판 및 그 제조방법 |
US20070181232A1 (en) | 2004-03-25 | 2007-08-09 | Posco | Cold rolled steel sheet and hot dipped steel sheet with superior strength and bake hardenability and method for manufacturing the steel sheets |
KR20050095537A (ko) * | 2004-03-25 | 2005-09-29 | 주식회사 포스코 | 고강도 소부경화형 냉간압연강판, 용용도금강판 및 그제조방법 |
EP1937854B1 (en) * | 2005-09-23 | 2014-11-12 | Posco | Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel sheet and method for manufacturing the cold rolled steel sheet |
KR100685037B1 (ko) * | 2005-09-23 | 2007-02-20 | 주식회사 포스코 | 내시효성이 우수한 고장력 소부경화형 냉간압연강판,용융도금강판 및 냉연강판의 제조방법 |
-
2009
- 2009-06-04 KR KR20090049398A patent/KR101105040B1/ko active IP Right Grant
- 2009-06-09 JP JP2011516115A patent/JP5450618B2/ja active Active
- 2009-06-09 US US13/000,655 patent/US9011615B2/en active Active
Also Published As
Publication number | Publication date |
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KR20090133075A (ko) | 2009-12-31 |
JP2011525569A (ja) | 2011-09-22 |
US9011615B2 (en) | 2015-04-21 |
US20110100516A1 (en) | 2011-05-05 |
KR101105040B1 (ko) | 2012-01-16 |
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