RU2000119124A - SUPER-HIGH-STRENGTH TWO-PHASE STEEL WITH HIGH SHOCK VISCOSITY AT CRYOGENIC TEMPERATURE - Google Patents
SUPER-HIGH-STRENGTH TWO-PHASE STEEL WITH HIGH SHOCK VISCOSITY AT CRYOGENIC TEMPERATUREInfo
- Publication number
- RU2000119124A RU2000119124A RU2000119124/02A RU2000119124A RU2000119124A RU 2000119124 A RU2000119124 A RU 2000119124A RU 2000119124/02 A RU2000119124/02 A RU 2000119124/02A RU 2000119124 A RU2000119124 A RU 2000119124A RU 2000119124 A RU2000119124 A RU 2000119124A
- Authority
- RU
- Russia
- Prior art keywords
- phase
- fine
- sheet
- steel
- grained
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims 28
- 239000010959 steel Substances 0.000 title claims 28
- 230000035939 shock Effects 0.000 title 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims 7
- 229910052759 nickel Inorganic materials 0.000 claims 7
- 229910000859 α-Fe Inorganic materials 0.000 claims 7
- 229910001563 bainite Inorganic materials 0.000 claims 6
- 229910000734 martensite Inorganic materials 0.000 claims 6
- 239000000203 mixture Substances 0.000 claims 6
- 230000001131 transforming Effects 0.000 claims 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 4
- 229910052748 manganese Inorganic materials 0.000 claims 4
- 238000010791 quenching Methods 0.000 claims 4
- 229910001566 austenite Inorganic materials 0.000 claims 3
- 238000007906 compression Methods 0.000 claims 3
- 238000005098 hot rolling Methods 0.000 claims 3
- 239000010955 niobium Substances 0.000 claims 3
- 230000000171 quenching Effects 0.000 claims 3
- 229910052720 vanadium Inorganic materials 0.000 claims 3
- 230000000996 additive Effects 0.000 claims 2
- 239000000654 additive Substances 0.000 claims 2
- 238000005275 alloying Methods 0.000 claims 2
- 229910052804 chromium Inorganic materials 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 2
- 229910052750 molybdenum Inorganic materials 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 150000001247 metal acetylides Chemical class 0.000 claims 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims 1
- 229910052758 niobium Inorganic materials 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 230000000087 stabilizing Effects 0.000 claims 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium(0) Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
Claims (1)
(a) нагревают стальной сляб до температуры (i) достаточно высокой, чтобы существенно гомогенизировать стальной сляб и растворить практически все карбиды и карбонитриды ниобия и ванадия в стальном слябе, и (ii) достаточно низкой, чтобы сформировать мелкие исходные зерна аустенита в стальном слябе;
(b) подвергают стальной сляб обжатию для получения стального листа за один или несколько проходов горячей прокатки в первом интервале температур, в котором происходит рекристаллизация аустенита;
(c) снова подвергают стальной лист обжатию за один или несколько проходов горячей прокатки во втором интервале температур, который приблизительно ниже температуры Тnr и выше температуры фазового превращения Аr3;
(d) еще раз подвергают стальной лист обжатию за один или несколько проходов горячей прокатки в третьем интервале температур, находящемся приблизительно между температурой фазового превращения Аr3 и температурой фазового превращения Ar1;
(e) закаливают стальной лист при скорости охлаждения около 10-40oС в секунду (18-72oF/сек) до температуры прекращения закалки (ТПЗ), которая приблизительно ниже температуры фазового превращения Ms плюс 200oС (360oF);
(f) прекращают закалку, чтобы облегчить фазовое превращение микроструктуры стального листа с получением около 10-40 об. % первой фазы из феррита или около 60-90 об. % второй фазы преимущественно из мелкозернистого пластинчатого мартенсита, мелкозернистого нижнего бейнита или их смесей.1. A method of manufacturing a sheet of two-phase steel having a transition temperature from a viscous to a brittle (TPWH) is lower than about -73 o C (-100 o F) both in the base sheet and in the heat affected zone (HAZ), and microstructure containing about 10-40 vol. % of the first phase, consisting mainly of ferrite, and about 60-90 vol. % of the second phase, consisting mainly of fine-grained lamellar martensite, fine-grained lower bainite or mixtures thereof, consisting in the fact that
(a) heat the steel slab to a temperature (i) high enough to substantially homogenize the steel slab and dissolve almost all the carbides and carbonitrides of niobium and vanadium in the steel slab, and (ii) low enough to form fine initial austenite grains in the steel slab;
(b) subjecting a steel slab to compression to obtain a steel sheet in one or more hot rolling passes in the first temperature range in which the austenite is recrystallized;
(c) the steel sheet is again subjected to compression in one or several hot rolling passes in the second temperature range, which is approximately below the temperature T nr and above the phase transformation temperature Ar 3 ;
(d) once again subjecting the steel sheet to compression in one or several hot rolling passes in the third temperature range, which is approximately between the phase transformation temperature Ar 3 and the phase transformation temperature Ar 1 ;
(e) quench the steel sheet at a cooling rate of about 10-40 o C per second (18-72 o F / s) to the quenching stop temperature (TIB), which is approximately below the phase transformation temperature M s s plus 200 o C (360 o F );
(f) quenching is stopped in order to facilitate the phase transformation of the microstructure of the steel sheet with obtaining about 10-40 vol. % of the first phase of ferrite or about 60-90 vol. % of the second phase mainly from fine-grained lamellar martensite, fine-grained lower bainite or their mixtures.
C - 0,04-0,12
Ni - 1-9
Nb - 0,02-0,1
Ti - 0,008-0,03
Al - 0,001-0,05
N - 0,002-0,005
9. Способ по п. 8, в котором стальной сляб содержит меньше около 6 мас. % Ni.8. A method according to claim 1, wherein the steel slab in step (a) contains iron and the following alloying elements, wt. %:
C - 0.04-0.12
Ni - 1-9
Nb - 0.02-0.1
Ti - 0.008-0.03
Al - 0.001-0.05
N - 0.002-0.005
9. The method according to p. 8, in which the steel slab contains less than about 6 wt. % Ni.
C - 0,04-0,12
Ni - 1-9
Nb - 0,02-0,1
Ti - 0,008-0,03
Al - 0,001-0,05
N - 0,002-0,005
16. Лист по п. 15, который содержит менее, чем около 6 мас. % Ni.15. A sheet of two-phase steel having a microstructure containing about 10-40 vol. % of the first phase, consisting mainly of ferrite, and about 60-90 vol. % of the second phase, consisting mainly of fine-grained lamellar martensite, fine-grained lower bainite, or mixtures thereof, having a tensile strength higher than 830 MPa (120 kilopounds per square inch), a transition temperature from a viscous to brittle (TPWH) lower than about -73 o C (-100 o F) both in the base sheet and in the heat-affected zone (HAZ), and the above-mentioned steel sheet is obtained from a heated steel slab containing iron and the following alloying elements, indicated, wt. %:
C - 0.04-0.12
Ni - 1-9
Nb - 0.02-0.1
Ti - 0.008-0.03
Al - 0.001-0.05
N - 0.002-0.005
16. The sheet according to claim 15, which contains less than about 6 wt. % Ni.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6881697P | 1997-12-19 | 1997-12-19 | |
US60/068,816 | 1997-12-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
RU2000119124A true RU2000119124A (en) | 2002-06-10 |
RU2216599C2 RU2216599C2 (en) | 2003-11-20 |
Family
ID=22084874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU2000119124/02A RU2216599C2 (en) | 1997-12-19 | 1998-06-18 | Superhigh strength double-phase steel with high impact viscosity at cryogenic temperature |
Country Status (42)
Country | Link |
---|---|
US (1) | US6066212A (en) |
EP (1) | EP1040205A4 (en) |
JP (1) | JP2001527154A (en) |
KR (1) | KR100374437B1 (en) |
CN (1) | CN1098359C (en) |
AR (1) | AR013110A1 (en) |
AT (1) | AT409388B (en) |
AU (1) | AU741006B2 (en) |
BG (1) | BG104623A (en) |
BR (1) | BR9813690A (en) |
CA (1) | CA2315086C (en) |
CH (1) | CH694098A5 (en) |
CO (1) | CO5040183A1 (en) |
DE (1) | DE19882881T1 (en) |
DK (1) | DK200000937A (en) |
DZ (1) | DZ2531A1 (en) |
ES (1) | ES2181565B2 (en) |
FI (1) | FI112381B (en) |
GB (1) | GB2347684B (en) |
GC (1) | GC0000037A (en) |
GE (1) | GEP20043272B (en) |
HR (1) | HRP980344B1 (en) |
HU (1) | HUP0101159A3 (en) |
ID (1) | ID26843A (en) |
IL (1) | IL136844A (en) |
MY (1) | MY114596A (en) |
NO (1) | NO20003173L (en) |
NZ (1) | NZ505335A (en) |
OA (1) | OA11425A (en) |
PE (1) | PE89499A1 (en) |
PL (1) | PL341755A1 (en) |
RU (1) | RU2216599C2 (en) |
SE (1) | SE517697C2 (en) |
SI (1) | SI20277A (en) |
SK (1) | SK8742000A3 (en) |
TN (1) | TNSN98101A1 (en) |
TR (1) | TR200001855T2 (en) |
TW (1) | TW459053B (en) |
UA (1) | UA59426C2 (en) |
WO (1) | WO1999032671A1 (en) |
YU (1) | YU37700A (en) |
ZA (1) | ZA985320B (en) |
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1998
- 1998-06-17 TW TW087109711A patent/TW459053B/en not_active IP Right Cessation
- 1998-06-17 DZ DZ980141A patent/DZ2531A1/en active
- 1998-06-18 TN TNTNSN98101A patent/TNSN98101A1/en unknown
- 1998-06-18 JP JP2000525585A patent/JP2001527154A/en active Pending
- 1998-06-18 PL PL98341755A patent/PL341755A1/en unknown
- 1998-06-18 HU HU0101159A patent/HUP0101159A3/en unknown
- 1998-06-18 US US09/099,152 patent/US6066212A/en not_active Expired - Lifetime
- 1998-06-18 KR KR10-2000-7006667A patent/KR100374437B1/en not_active IP Right Cessation
- 1998-06-18 HR HR980344A patent/HRP980344B1/en not_active IP Right Cessation
- 1998-06-18 RU RU2000119124/02A patent/RU2216599C2/en not_active IP Right Cessation
- 1998-06-18 UA UA2000074220A patent/UA59426C2/en unknown
- 1998-06-18 ES ES200050040A patent/ES2181565B2/en not_active Expired - Fee Related
- 1998-06-18 DE DE19882881T patent/DE19882881T1/en not_active Withdrawn
- 1998-06-18 CO CO98034682A patent/CO5040183A1/en unknown
- 1998-06-18 IL IL13684498A patent/IL136844A/en not_active IP Right Cessation
- 1998-06-18 ID IDW20001391A patent/ID26843A/en unknown
- 1998-06-18 CA CA002315086A patent/CA2315086C/en not_active Expired - Fee Related
- 1998-06-18 GB GB0013635A patent/GB2347684B/en not_active Expired - Fee Related
- 1998-06-18 CH CH01231/00A patent/CH694098A5/en not_active IP Right Cessation
- 1998-06-18 AT AT0915598A patent/AT409388B/en not_active IP Right Cessation
- 1998-06-18 PE PE1998000528A patent/PE89499A1/en not_active Application Discontinuation
- 1998-06-18 SI SI9820086A patent/SI20277A/en not_active IP Right Cessation
- 1998-06-18 WO PCT/US1998/012701 patent/WO1999032671A1/en not_active IP Right Cessation
- 1998-06-18 BR BR9813690-9A patent/BR9813690A/en not_active IP Right Cessation
- 1998-06-18 TR TR2000/01855T patent/TR200001855T2/en unknown
- 1998-06-18 NZ NZ505335A patent/NZ505335A/en unknown
- 1998-06-18 CN CN98812426A patent/CN1098359C/en not_active Expired - Fee Related
- 1998-06-18 EP EP98931362A patent/EP1040205A4/en not_active Withdrawn
- 1998-06-18 SK SK874-2000A patent/SK8742000A3/en unknown
- 1998-06-18 ZA ZA9805320A patent/ZA985320B/en unknown
- 1998-06-18 AU AU81510/98A patent/AU741006B2/en not_active Ceased
- 1998-06-18 YU YU37700A patent/YU37700A/en unknown
- 1998-06-18 GE GEAP19985469A patent/GEP20043272B/en unknown
- 1998-06-19 AR ARP980102966A patent/AR013110A1/en unknown
- 1998-06-20 MY MYPI98002810A patent/MY114596A/en unknown
- 1998-10-25 GC GCP199824 patent/GC0000037A/en active
-
2000
- 2000-06-15 OA OA1200000172A patent/OA11425A/en unknown
- 2000-06-16 DK DK200000937A patent/DK200000937A/en not_active Application Discontinuation
- 2000-06-16 FI FI20001441A patent/FI112381B/en not_active IP Right Cessation
- 2000-06-16 SE SE0002246A patent/SE517697C2/en not_active IP Right Cessation
- 2000-06-19 NO NO20003173A patent/NO20003173L/en not_active Application Discontinuation
- 2000-07-18 BG BG104623A patent/BG104623A/en unknown
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