EP1484423B1 - Steel plate subjected to heat treatment and process for producing the same - Google Patents
Steel plate subjected to heat treatment and process for producing the same Download PDFInfo
- Publication number
- EP1484423B1 EP1484423B1 EP03743986A EP03743986A EP1484423B1 EP 1484423 B1 EP1484423 B1 EP 1484423B1 EP 03743986 A EP03743986 A EP 03743986A EP 03743986 A EP03743986 A EP 03743986A EP 1484423 B1 EP1484423 B1 EP 1484423B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel sheet
- heat treatment
- less
- content
- quenching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 124
- 239000010959 steel Substances 0.000 title claims description 124
- 238000010438 heat treatment Methods 0.000 title claims description 38
- 238000000034 method Methods 0.000 title claims description 26
- 238000001816 cooling Methods 0.000 claims description 27
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 14
- 239000010960 cold rolled steel Substances 0.000 claims description 13
- 238000005098 hot rolling Methods 0.000 claims description 13
- 238000000137 annealing Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- -1 iron carbides Chemical class 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 238000005097 cold rolling Methods 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 description 39
- 230000000171 quenching effect Effects 0.000 description 39
- 230000000052 comparative effect Effects 0.000 description 26
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 19
- 229910052739 hydrogen Inorganic materials 0.000 description 19
- 239000001257 hydrogen Substances 0.000 description 19
- 230000003111 delayed effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000677 High-carbon steel Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- VPSXHKGJZJCWLV-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-(1-ethylpiperidin-4-yl)oxypyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OC1CCN(CC1)CC VPSXHKGJZJCWLV-UHFFFAOYSA-N 0.000 description 1
- DXCXWVLIDGPHEA-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-[(4-ethylpiperazin-1-yl)methyl]pyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)CN1CCN(CC1)CC DXCXWVLIDGPHEA-UHFFFAOYSA-N 0.000 description 1
- APLNAFMUEHKRLM-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(3,4,6,7-tetrahydroimidazo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)N=CN2 APLNAFMUEHKRLM-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
- C22C38/04—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
Definitions
- Japanese Unexamined Patent Application Publication No. 10-96031 there is proposed a method for manufacturing a high carbon hot rolled steel sheet and a high carbon cold rolled steel sheet that are each excellent in ductility before being quenched and that are each capable of having a predetermined hardness and toughness after being quenched.
- a Cr, Ti and B-added hot rolled steel sheet containing 0.25-0.65% C and 0.20-0.40% Mn is heated at a temperature of 650°C to below Ac 1 for 10 to 30 hours, or is slowly cooled to (Ac 1 -30)°C at a cooling rate of 3 to 20°C/h or to (Ac 1 -20)°C at a cooling rate of 3 to 10°C/h after being heated at a temperature of Ac 1 to (Ac 1 +30)°C for 1 to 20 hours, followed, by necessary, by being cold rolled at a reduction rate of 30 to 70% and heated at a temperature of 650°C to below Ac 1 for 20 seconds or more.
- the object is achieved by providing a steel sheet for heat treatment consisting of, by mass %, 0.05-0.09% C, 1% Si or less, 1.6-2.4% Mn, 0.02% P or less, 0.02% S or less, 0.01-0.1% sol.Al, 0.005% N or less, 0.0003-0.003% B, Ti satisfying formula (1), optionally 0.1-2 % each of at least one of Cr and/or Mo and the balance of Fe, wherein the average diameter of iron carbides precipitating in the steel is 2 ⁇ m or smaller.
- the hot rolled steel sheet is cooled at the average cooling rate of 30°C/s or less for the reason that an average cooling rate exceeding 30°C/s generates second phases that deteriorate the formability of steel sheet.
- the coiling temperature is set to 500°C or higher.
- Steel sheet 6 has Ti content less than the invention range, so that the tensile strength after quenching is insufficient under the condition 2.
- Steel sheet 8 has Ti content greater than the invention range, so that the steel sheet has low ductility, hence offering poor formability.
- Steel sheet 9 has B content less than the invention range, so that the steel sheet has insufficient tensile strength after quenching under the condition 2.
- Steel sheet 10 has B content greater than the invention range, so that the steel sheet has low ductility, hence offering poor formability.
- Steel sheet 14 has an average carbide diameter exceeding 2 ⁇ m, so that the steel sheet has insufficient tensile strength at low temperature and short time heat treatment under the condition 3.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002063488A JP3918589B2 (ja) | 2002-03-08 | 2002-03-08 | 熱処理用鋼板およびその製造方法 |
| JP2002063488 | 2002-03-08 | ||
| PCT/JP2003/002300 WO2003076675A1 (fr) | 2002-03-08 | 2003-02-28 | Tole d'acier soumise a un traitement thermique et procede de production correspondant |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1484423A1 EP1484423A1 (en) | 2004-12-08 |
| EP1484423A4 EP1484423A4 (en) | 2005-04-06 |
| EP1484423B1 true EP1484423B1 (en) | 2006-06-28 |
Family
ID=27800192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03743986A Expired - Lifetime EP1484423B1 (en) | 2002-03-08 | 2003-02-28 | Steel plate subjected to heat treatment and process for producing the same |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20050121119A1 (ja) |
| EP (1) | EP1484423B1 (ja) |
| JP (1) | JP3918589B2 (ja) |
| DE (1) | DE60306500T2 (ja) |
| WO (1) | WO2003076675A1 (ja) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2406891B (en) * | 2003-10-07 | 2006-09-27 | Renold Plc | A transmission chain |
| JP2005188638A (ja) * | 2003-12-25 | 2005-07-14 | Sanden Corp | 動力伝達装置 |
| JP4959245B2 (ja) * | 2006-07-08 | 2012-06-20 | 株式会社デルタツーリング | 高強度金属部材の製造方法 |
| NZ594927A (en) * | 2009-03-10 | 2013-01-25 | Nisshin Steel Co Ltd | Zinc-based alloy-plated steel material excellent in resistance to molten-metal embrittlement cracking |
| KR101149728B1 (ko) * | 2009-07-21 | 2012-07-09 | 부산대학교 산학협력단 | 차량용 멤버 제작방법 |
| PL2703511T3 (pl) * | 2011-04-27 | 2018-10-31 | Nippon Steel & Sumitomo Metal Corporation | Blacha stalowa cienka na elementy wytłaczane na gorąco i sposób jej wytwarzania |
| CN111801436B (zh) | 2019-02-05 | 2021-10-29 | 日本制铁株式会社 | 钢构件、钢板及它们的制造方法 |
| EP3922738A4 (en) | 2019-02-05 | 2022-03-23 | Nippon Steel Corporation | STEEL ELEMENT, COATED STEEL SHEET AND METHOD FOR ITS MANUFACTURE |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294271A (en) * | 1991-06-14 | 1994-03-15 | Nisshin Steel Co., Ltd. | Heat treatment for manufacturing spring steel excellent in high-temperature relaxation resistance |
| JP3298746B2 (ja) * | 1994-09-08 | 2002-07-08 | 新日本製鐵株式会社 | 加工性および溶接性の良い高強度熱延鋼板 |
| US5853903A (en) * | 1996-05-07 | 1998-12-29 | Nkk Corporation | Steel sheet for excellent panel appearance and dent resistance after panel-forming |
| JP3166652B2 (ja) * | 1997-03-14 | 2001-05-14 | 住友金属工業株式会社 | 成形性にすぐれた高炭素薄鋼板の製造方法 |
| JP4214330B2 (ja) * | 1998-11-17 | 2009-01-28 | 住友金属工業株式会社 | 成形性および焼入れ性にすぐれた鋼板とその製造方法 |
| JP3447233B2 (ja) * | 1998-12-11 | 2003-09-16 | 新日本製鐵株式会社 | 熱処理硬化能に優れた薄鋼板及び高強度プレス成形体の製造方法 |
-
2002
- 2002-03-08 JP JP2002063488A patent/JP3918589B2/ja not_active Expired - Fee Related
-
2003
- 2003-02-28 WO PCT/JP2003/002300 patent/WO2003076675A1/ja active IP Right Grant
- 2003-02-28 EP EP03743986A patent/EP1484423B1/en not_active Expired - Lifetime
- 2003-02-28 US US10/505,575 patent/US20050121119A1/en not_active Abandoned
- 2003-02-28 DE DE60306500T patent/DE60306500T2/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE60306500D1 (de) | 2006-08-10 |
| DE60306500T2 (de) | 2006-11-09 |
| JP3918589B2 (ja) | 2007-05-23 |
| US20050121119A1 (en) | 2005-06-09 |
| EP1484423A1 (en) | 2004-12-08 |
| WO2003076675A1 (fr) | 2003-09-18 |
| EP1484423A4 (en) | 2005-04-06 |
| JP2003268489A (ja) | 2003-09-25 |
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