JP4206056B2 - 低yr高張力鋼板及びその製造方法 - Google Patents
低yr高張力鋼板及びその製造方法 Download PDFInfo
- Publication number
- JP4206056B2 JP4206056B2 JP2004156375A JP2004156375A JP4206056B2 JP 4206056 B2 JP4206056 B2 JP 4206056B2 JP 2004156375 A JP2004156375 A JP 2004156375A JP 2004156375 A JP2004156375 A JP 2004156375A JP 4206056 B2 JP4206056 B2 JP 4206056B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- steel sheet
- low
- toughness
- strength
- 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 - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 87
- 239000010959 steel Substances 0.000 title claims description 87
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title description 17
- 239000002245 particle Substances 0.000 claims description 31
- 229910001563 bainite Inorganic materials 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 14
- 238000005098 hot rolling Methods 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 12
- 230000000171 quenching effect Effects 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 26
- 238000003466 welding Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 12
- 229910000859 α-Fe Inorganic materials 0.000 description 10
- 229910001566 austenite Inorganic materials 0.000 description 9
- 230000007423 decrease Effects 0.000 description 7
- 150000004767 nitrides Chemical class 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000010949 copper Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000009849 vacuum degassing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- -1 is used as a site Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Description
(1)質量%で、C:0.04〜0.20%、Si:0.05〜0.35%、Mn:0.50〜2.50%、Al:0.003〜0.03%、Ti:0.001〜0.02%、B:0.0002〜0.003%、Ca:0.0003〜0.0025%を含有し、N:0.006%以下であり、残部Fe及び不可避不純物からなり、C+100×Bの値が0.1%以上0.32%以下であり、板厚方向で、板表面下5mmまでを除いた領域においてベーナイト分率が50%以上であり、板厚が70mm以上であることを特徴とする低YR高張力鋼板。
(2)さらに質量%で、Ni:0.001〜0.9%、Cr0.001〜0.3%、Mo:0.001〜0.04%、V:0.001〜0.05%、Nb:0.001〜0.05%の1種又は2種以上を含有することを特徴とする上記(1)に記載の低YR高張力鋼板。
(3)鋼中に円相当径で0.005〜2.0μmの酸化物粒子を単位面積当たりの個数密度で100〜3000個/mm2含有し、その酸化物粒子の組成が少なくともCa、Al、Oを含み、Oを除いた元素が質量比で、Ca:5%以上、Al:5%以上を含有することを特徴とする上記(1)又は(2)に記載の低YR高張力鋼板。
(4)耐力440MPa以上、引張強度590MPa以上、降伏比80%以下で優れた大入熱継手靭性を有することを特徴とする上記(1)乃至(3)のいずれかに記載の低YR高張力鋼板。
(5)上記(1)乃至(3)のいずれかに記載の成分を有する鋼板を、熱間圧延終了後、Ar3温度以上から水冷焼入れを開始し、150℃以下まで水冷することを特徴とする低YR高張力鋼板の製造方法。
Claims (5)
- 質量%で、C:0.04〜0.20%、Si:0.05〜0.35%、Mn:0.50〜2.50%、Al:0.003〜0.03%、Ti:0.001〜0.02%、B:0.0002〜0.003%、Ca:0.0003〜0.0025%を含有し、N:0.006%以下であり、残部Fe及び不可避不純物からなり、C+100×Bの値が0.1%以上0.32%以下であり、板厚方向で、板表面下5mmまでを除いた領域においてベーナイト分率が50%以上であり、板厚が70mm以上であることを特徴とする低YR高張力鋼板。
- さらに質量%で、Ni:0.001〜0.9%、Cr0.001〜0.3%、Mo:0.001〜0.04%、V:0.001〜0.05%、Nb:0.001〜0.05%の1種又は2種以上を含有することを特徴とする請求項1に記載の低YR高張力鋼板。
- 鋼中に円相当径で0.005〜2.0μmの酸化物粒子を単位面積当たりの個数密度で100〜3000個/mm2含有し、その酸化物粒子の組成が少なくともCa、Al、Oを含み、Oを除いた元素が質量比で、Ca:5%以上、Al:5%以上を含有することを特徴とする請求項1又は2に記載の低YR高張力鋼板。
- 耐力440MPa以上、引張強度590MPa以上、降伏比80%以下で優れた大入熱継手靭性を有することを特徴とする請求項1乃至3のいずれかに記載の低YR高張力鋼板。
- 請求項1乃至3のいずれかに記載の成分を有する鋼板を、熱間圧延終了後、Ar3温度以上から水冷焼入れを開始し、150℃以下まで水冷することを特徴とする低YR高張力鋼板の製造方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004156375A JP4206056B2 (ja) | 2004-05-26 | 2004-05-26 | 低yr高張力鋼板及びその製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004156375A JP4206056B2 (ja) | 2004-05-26 | 2004-05-26 | 低yr高張力鋼板及びその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005336541A JP2005336541A (ja) | 2005-12-08 |
JP4206056B2 true JP4206056B2 (ja) | 2009-01-07 |
Family
ID=35490429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004156375A Expired - Fee Related JP4206056B2 (ja) | 2004-05-26 | 2004-05-26 | 低yr高張力鋼板及びその製造方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4206056B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105063484A (zh) * | 2015-08-28 | 2015-11-18 | 宝山钢铁股份有限公司 | 屈服强度500MPa级高延伸率热镀铝锌及彩涂钢板及其制造方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE477348T1 (de) | 2006-06-07 | 2010-08-15 | Thyssenkrupp Steel Europe Ag | Verwendung eines aus einem mangan-bor-stahl hergestellten flachproduktes und verfahren zu dessen herstellung |
CN102851589B (zh) * | 2011-06-29 | 2014-06-04 | 宝山钢铁股份有限公司 | 低屈强比可超大热输入焊接低温结构用钢及其制造方法 |
CN105063479B (zh) * | 2015-08-25 | 2017-09-29 | 内蒙古包钢钢联股份有限公司 | 一种含硼冷镦钢的生产方法 |
-
2004
- 2004-05-26 JP JP2004156375A patent/JP4206056B2/ja not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105063484A (zh) * | 2015-08-28 | 2015-11-18 | 宝山钢铁股份有限公司 | 屈服强度500MPa级高延伸率热镀铝锌及彩涂钢板及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2005336541A (ja) | 2005-12-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5162382B2 (ja) | 低降伏比高靭性厚鋼板 | |
JP5476763B2 (ja) | 延性に優れた高張力鋼板及びその製造方法 | |
JP5130796B2 (ja) | 大入熱溶接熱影響部靭性に優れた低降伏比高強度厚鋼板およびその製造方法 | |
JPWO2006009299A1 (ja) | 溶接熱影響部の低温靱性が優れた溶接構造用鋼およびその製造方法 | |
JP2005320624A (ja) | 大入熱溶接による溶接熱影響部の低温靭性に優れた厚手高強度鋼板 | |
JP2009270194A (ja) | 低温靭性の優れた780MPa級高張力鋼板の製造方法 | |
JP5729803B2 (ja) | 高張力鋼板およびその製造方法 | |
JP5217092B2 (ja) | 耐疲労亀裂伝播特性に優れる鋼材の製造方法 | |
JP2010280976A (ja) | 超大入熱溶接熱影響部靭性に優れた低降伏比高張力厚鋼板およびその製造方法 | |
JP2010229453A (ja) | 1層大入熱溶接熱影響部の靭性に優れた高強度厚鋼板およびその製造方法 | |
JP2019199649A (ja) | 非調質低降伏比高張力厚鋼板およびその製造方法 | |
JP5796636B2 (ja) | 大入熱溶接用鋼材 | |
JP4507708B2 (ja) | 低降伏比高強度高靱性鋼板の製造方法 | |
JP2011074447A (ja) | 大入熱溶接熱影響部の靭性に優れた高強度鋼 | |
JP6086090B2 (ja) | 溶接熱影響部靭性に優れた非調質低降伏比高張力厚鋼板およびその製造方法 | |
JP2005068478A (ja) | 超大入熱溶接熱影響部靱性に優れた低降伏比高張力厚鋼板の製造方法 | |
JP4008378B2 (ja) | 靭性および溶接性に優れた低降伏比高強度鋼 | |
JP2006118007A (ja) | 溶接熱影響部の靭性に優れた高強度鋼材 | |
JP4449388B2 (ja) | 脆性亀裂伝播停止特性および超大入熱溶接熱影響部靱性に優れた高張力厚鋼板の製造方法 | |
JP5390922B2 (ja) | 低降伏比高靭性厚鋼板 | |
JP4206056B2 (ja) | 低yr高張力鋼板及びその製造方法 | |
JP6237681B2 (ja) | 溶接熱影響部靭性に優れた低降伏比高張力鋼板 | |
JP2005097694A (ja) | 脆性亀裂伝播停止性能に優れた非調質高強度厚鋼板の製造方法 | |
JPWO2019180957A1 (ja) | 圧延h形鋼及びその製造方法 | |
JP2006274403A (ja) | 疲労き裂伝播特性と靱性に優れた厚鋼板及びその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060907 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080929 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20081007 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20081017 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 3 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 4206056 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121024 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121024 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 5 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 5 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 5 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
LAPS | Cancellation because of no payment of annual fees |