JP2016509129A - 高強度鋼板及びその製造方法 - Google Patents
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 138
- 239000010959 steel Substances 0.000 title claims abstract description 138
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 43
- 238000001816 cooling Methods 0.000 claims description 35
- 229910052799 carbon Inorganic materials 0.000 claims description 30
- 238000005496 tempering Methods 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000035945 sensitivity Effects 0.000 claims description 11
- 229910001563 bainite Inorganic materials 0.000 claims description 10
- 238000005336 cracking Methods 0.000 claims description 9
- 229910000734 martensite Inorganic materials 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 4
- 229910052758 niobium Inorganic materials 0.000 abstract description 4
- 229910052719 titanium Inorganic materials 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 229910052720 vanadium Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 28
- 230000008569 process Effects 0.000 description 26
- 238000003466 welding Methods 0.000 description 23
- 229910001566 austenite Inorganic materials 0.000 description 17
- 239000013078 crystal Substances 0.000 description 13
- 229910045601 alloy Inorganic materials 0.000 description 12
- 239000000956 alloy Substances 0.000 description 12
- 238000005728 strengthening Methods 0.000 description 9
- 150000001247 metal acetylides Chemical class 0.000 description 6
- 150000004767 nitrides Chemical class 0.000 description 6
- 229910000746 Structural steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical group OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Abstract
Description
そして、鋼板の溶接割れ感受性インデックスPcm値は、下記式によって決定される。
中華人民共和国黒色冶金産業標準YB/T 4137-2005の規定によって、降伏強度が800MPa、規範がQ800CFである鋼種は、Pcm値が0.28%未満である必要がある。欧州規格10025-6:2004及び中国国家標準GB/T 16270:2009の規定によって、降伏強度が890MPaである鋼板の炭素当量CEVは、0.72%以下に限定された。
C:0.070〜0.115%、
Si:0.20〜0.50%、
Mn:1.80〜2.30%、
Cr:0〜0.35%、
Mo:0.10〜0.40%、
Nb:0.03〜0.06%、
V:0.03〜0.06%、
Ti:0.002〜0.04%、
Al:0.01〜0.08%、
B:0.0006〜0.0020% 、
N≦0.0060%、
O≦0.0040%、
Ca:0〜0.0045%であり、
残部がFe及び他の不可避的不純物である。
C:鋼に合金元素を添加して、鋼板の強度を向上できるが、炭素当量及び溶接割れ感受性インデックスをも向上して、鋼板の溶接性能を劣化させる。炭素含有量が低いと、鋼板は、TMCPプロセス工程において強度が低いフェライト組織を形成し、鋼板の降伏強度と引張り強度を低下させる。鋼板強靭性の需要と組み合わせて考慮すれば、本発明のC含有量は0.070〜0.115%に制御すべきである。
1)高強度の超微細ベイナイトラスとマルテンサイトの微視組織を有する;
2)降伏強度が890MPa以上である;
3)優れた溶接性能、良好な低温靭性、及び良好な延伸率を有する;
4)合金元素が少なく、低炭素当量CEV≦0.56%を有し、生産コストが下がる;
5)机械設備分野の高強靭への要求を満足する。
下記工程に従って本発明に記載の高強度鋼板を製造する。
1)溶錬
各成分の配合比を表1に示したように制御し、そして炭素当量がCEV≦0.56%を満足する;
2)鋳造;
3)加熱
加熱温度が1040〜1250℃である;
4)圧延
二段階圧延に分けられ、その第一段階の初期圧延温度が1010〜1240℃であり、第一段階が多重パス圧延であり、各圧延パスの変形率範囲が8〜30%であり、第一段階圧延を経た後に冷却し、冷却は、圧延レールに載せて空冷し、或いは噴霧装置で水冷し又は霧冷する手段の一種、又はその組み合わせを採用し、第二段階の初期圧延温度が750〜870℃であり、最終圧延温度が740〜850℃であり、第二段階が多重パス圧延であり、各圧延パスの変形率範囲が5〜30%である;
5)冷却
圧延後の鋼板を15〜50℃/sの速度で450℃以下に水冷した後に、水から取り出して室温まで空冷して、微視組織が超微細ベイナイトラスとマルテンサイトである鋼板を得る;
6)焼戻し
焼戻し温度が450〜650℃であり、焼戻した後に空冷し、空冷は、パイリング冷却(piling cooling)又はベッド冷却(bed cooling)を採用できる。
Claims (10)
- 化学元素質量百分含有量が
C:0.070〜0.115%、
Si:0.20〜0.50%、
Mn:1.80〜2.30%、
Cr:0〜0.35%、
Mo:0.10〜0.40%、
Nb:0.03〜0.06%、
V:0.03〜0.06%、
Ti:0.002〜0.04%、
Al:0.01〜0.08%、
B:0.0006〜0.0020% 、
N≦0.0060%、
O≦0.0040%、
Ca:0〜0.0045%であり、
残部がFe和他の不可避的不純物であることを特徴とする高強度鋼板。 - 炭素当量がCEV≦0.56%であることを特徴とする、請求項1に記載の高強度鋼板。
- 溶接割れ感受性インデックスPcm≦0.27%であることを特徴とする、請求項1に記載の高強度鋼板。
- 微視組織がベイナイトラス及びマルテンサイトであることを特徴とする、請求項1に記載の高強度鋼板。
- 溶錬、鋳造、加熱、圧延、冷却及び焼戻しの工程を順次に含むことを特徴とする、請求項1〜4のいずれか一項に記載の高強度鋼板の製造方法。
- 前記加熱工程において、鋳片を1040〜1250℃に加熱することを特徴とする、請求項5に記載の高強度鋼板の製造方法。
- 前記圧延工程が、二段階圧延に分けられて行なわれ、その第一段階の初期圧延温度が1010〜1240℃であり、第一段階で多重パス圧延を行い、各パスの変形率範囲が8〜30%であり、第二段階の初期圧延温度が750〜870℃であり、最終圧延温度が740〜850℃であり、第二段階で多重パス圧延を行い、各パスの変形率範囲が5〜30%であることを特徴とする、請求項5に記載の高強度鋼板の製造方法。
- 前記冷却工程において、圧延後の鋼板を15〜50℃/sの速度で450℃以下に水冷した後に、室温まで空冷することを特徴とする、請求項5に記載の高強度鋼板の製造方法。
- 前記焼戻し工程において、焼戻し温度が450〜650℃であることを特徴とする、請求項5に記載の高強度鋼板の製造方法。
- 焼戻した後に空冷を行うことを特徴とする、請求項5に記載の高強度鋼板の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310022008.3 | 2013-01-22 | ||
CN2013100220083A CN103060690A (zh) | 2013-01-22 | 2013-01-22 | 一种高强度钢板及其制造方法 |
PCT/CN2013/090268 WO2014114158A1 (zh) | 2013-01-22 | 2013-12-24 | 一种高强度钢板及其制造方法 |
Publications (3)
Publication Number | Publication Date |
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JP2016509129A true JP2016509129A (ja) | 2016-03-24 |
JP2016509129A5 JP2016509129A5 (ja) | 2018-07-05 |
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JP2018505305A (ja) * | 2014-12-19 | 2018-02-22 | 宝山鋼鉄股▲分▼有限公司 | 降伏強度800MPa級高強度鋼及びその製造方法 |
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KR102229530B1 (ko) | 2021-03-18 |
US11268176B2 (en) | 2022-03-08 |
RU2711698C2 (ru) | 2020-01-21 |
AU2013375523B2 (en) | 2018-06-07 |
AU2013375523A1 (en) | 2015-08-06 |
KR20150109461A (ko) | 2015-10-01 |
EP2949773A1 (en) | 2015-12-02 |
WO2014114158A1 (zh) | 2014-07-31 |
JP6426621B2 (ja) | 2018-11-21 |
ZA201505249B (en) | 2016-07-27 |
EP2949773A4 (en) | 2016-08-31 |
US20150361531A1 (en) | 2015-12-17 |
RU2015136605A (ru) | 2017-09-28 |
CN103060690A (zh) | 2013-04-24 |
EP2949773B1 (en) | 2020-07-01 |
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