JP2019508572A - 引張強度が1000〜1200MPaであり、かつ全伸びが16〜17%である高強度熱間圧延鋼(HRHSS) - Google Patents
引張強度が1000〜1200MPaであり、かつ全伸びが16〜17%である高強度熱間圧延鋼(HRHSS) Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 79
- 239000010959 steel Substances 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract 2
- 229910001566 austenite Inorganic materials 0.000 claims description 22
- 230000000717 retained effect Effects 0.000 claims description 17
- 229910001563 bainite Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 9
- 229910000734 martensite Inorganic materials 0.000 claims description 8
- 238000005482 strain hardening Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 9
- 238000005098 hot rolling Methods 0.000 abstract description 4
- 238000004804 winding Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 28
- 229910000859 α-Fe Inorganic materials 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 238000007654 immersion Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 229910001568 polygonal ferrite Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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- 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
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- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
【選択図】図1
Description
すぐれた強度と延性とを一体として獲得しようと試みた。この取組みは、最小引張強度1200MPaと全伸び20%とをうまく達成した。しかしながら、その鋼は炭素量とケイ素量とが多い(炭素は0.3質量%を超える)(ケイ素は1.5質量%を超える)。炭素量が多いと溶接性を低下させ、ケイ素量が多いと、熱間圧延鋼板とする工程で表面スケール(皮膜)の原因となる。これらの問題はいまだ対処中である。
降伏応力=600〜650MPa
引張強度=1000〜1200MPa
全伸び=16〜17%、そのときの均一伸び≧9%
加工硬化指数(n)=0.15〜0.16
Claims (18)
- 組成が、質量%で、C:0.18〜0.22、Mn:1.0〜2.0、Si:0.8〜1.2、Cr:0.8〜1.2、S:最大0.008、P:最大0.025、Al:0.01〜0.15、N:最大0.005、Nb:0.02〜0.035、Mo:0.08〜0.12で、残部がFeおよび偶発的含有物である鋼スラブを鋳造し、
前記鋼スラブを圧延終了温度(FRT)850〜900℃で熱間圧延してストリップに加工し、
熱間圧延されたストリップを、ランアウトテーブル(ROT)にて、40℃/s以上の速度で冷却することで、380〜400℃に到達させ、
熱間圧延が行われたストリップを巻き取り、そして室温まで空冷する、
ことを特徴とする高強度の熱間圧延鋼(HRHSS)の製品の製造方法。 - 製品の組成が、質量%で、C:0.22、Mn:1.48、Si:1.0、Cr:0.95、S:<0.004、P:0.02、Al:0.14、N:0.005、Nb:0.035、Mo:0.1で、残部がFeおよび偶発的含有物であることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の降伏応力が600〜650MPaであることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の引張強度が1000〜1200MPaであることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の全伸びが16〜17%であることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の均一伸びが9%以上であることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の加工硬化指数(n)が0.15〜0.16であることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の微細構造における残留オーステナイトが15〜20体積%であることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品の微細構造におけるマルテンサイトが5体積%未満であることを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 製品が厚さ200nm未満のベイナイト層を有することを特徴とする請求項1記載の高強度の熱間圧延鋼(HRHSS)の製品の製造方法。
- 組成が、質量%で、C:0.18〜0.22、Mn:1.0〜2.0、Si:0.8〜1.2、Cr:0.8〜1.2、S:最大0.008、P:最大0.025、Al:0.01〜0.15、N:最大0.005、Nb:0.02〜0.035、Mo:0.08〜0.12で、残部がFeおよび偶発的含有物であり、引張強度が1000〜1200MPaであり、全伸びが16〜17%であることを特徴とする高強度の熱間圧延鋼(HRHSS)の製品。
- 組成が、質量%で、C:0.22、Mn:1.48、Si:1.0、Cr:0.95、S:<0.004、P:0.02、Al:0.14、N:0.005、Nb:0.035、Mo:0.1で、残部がFeおよび偶発的含有物であることを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
- 降伏応力が600〜650MPaであることを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
- 均一伸びが9%以上であることを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
- 加工硬化指数(n)が0.15〜0.16であることを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
- 微細構造における残留オーステナイトが15〜20体積%であることを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
- 微細構造におけるマルテンサイトが5体積%未満であることを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
- 厚さ200nm未満のベイナイト層を有することを特徴とする請求項11記載の高強度の熱間圧延鋼(HRHSS)の製品。
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IN201631011120 | 2016-03-30 | ||
IN201631011120 | 2016-03-30 | ||
PCT/IN2017/000015 WO2017168436A1 (en) | 2016-03-30 | 2017-01-23 | A HOT ROLLED HIGH STRENGTH STEEL (HRHSS) PRODUCT WITH TENSILE STRENGTH OF 1000 -1200 MPa AND TOTAL ELONGATION OF 16%-17% |
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WO2020203943A1 (ja) * | 2019-04-04 | 2020-10-08 | 日本製鉄株式会社 | 亜鉛めっき鋼板およびその製造方法 |
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EP3592871A1 (en) | 2017-03-10 | 2020-01-15 | Tata Steel Limited | Hot rolled steel product with ultra-high strength minimum 1100mpa and good elongation 21% |
KR20230023097A (ko) * | 2021-08-09 | 2023-02-17 | 주식회사 포스코 | 성형성이 우수한 고강도 열연강판 및 이의 제조방법 |
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