JP7320513B2 - インラインでTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法 - Google Patents
インラインでTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims description 57
- 239000010959 steel Substances 0.000 title claims description 57
- 238000001556 precipitation Methods 0.000 title claims description 28
- 238000005728 strengthening Methods 0.000 title claims description 23
- 230000000694 effects Effects 0.000 title claims description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000005096 rolling process Methods 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000002791 soaking Methods 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000010936 titanium Substances 0.000 description 30
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 238000010583 slow cooling Methods 0.000 description 12
- 229910001566 austenite Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000742 Microalloyed steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000003466 welding Methods 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
- 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
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/008—Heat shields
-
- 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
-
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment 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
-
- 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
- C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
-
- 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
-
- 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
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
-
- 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
-
- 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
-
- 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
- C21D2211/004—Dispersions; Precipitations
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Description
本発明は高強度鋼の生産技術分野に属し、具体的には、インラインでTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法に関する。
近年、普通のC-Mn鋼又は低合金鋼マトリックスの化学成分に微量のTi元素(0.01~0.20%)が添加された微量合金化熱間圧延高強度鋼は、自動車、建設機械、コンテナ、橋梁、建築、鉄道車両等の分野で広く応用されており、関連業界で軽量化設計及び製造を実現するための重要な原料になっている。鋼において、Tiは微量合金添加元素として、主にTiC又はTi(C、N)の形態で沈殿析出し、鋼の強度を向上させ、鋼の冷間成形性能と溶接性能を改善することができる。
本発明の目的は、低コストで、高効率で、且つ周辺環境の影響を受けずにインラインでTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法を提供することにある。
本発明は、Ti微量合金化熱間圧延高強度鋼に、制御圧延、制御冷却、巻取りを経ってから、インラインで速やかに独立で密閉な保温カバー装置を被せることで、鋼コイルに保温徐冷を行い、巻取り残留熱を利用して鋼コイル全体の温度を均一化にし、TiCの均一的で十分な析出を促進し、且つそのサイズをナノレベルに保持し、析出強化効果向上の目的を果たす。
さらに、前記鋳片の加熱温度は≧1200℃であり、均熱時間は≧60分間である;
好ましくは、鋳片の加熱温度は1200~1350℃であり、均熱時間は1~2時間である;
さらに、前記粗圧延は、温度が1000~1200℃であり、3~8パスの往復式圧延が行われ、且つ累積変形量が≧50%である;
さらに、前記仕上圧延は、6~7パスの連続式圧延が行われ、且つ累積変形量が≧80%であり、仕上圧延温度が800~900℃である。
さらに、前記鋼コイルの保温カバー内での冷却速度は≦15℃/時間である;
好ましくは、前記鋼コイルのインライン保温時間は1~5時間である。
Tiは鋼におけるC、N原子と強い結合力を有し、Tiの添加量が適切である場合しか、各方面の要求を同時に満たすことができない。Tiの含有量が<0.03%であると、主にTiNは形成され、オーステナイト結晶粒子の粗大化を阻害する;Tiの含有量が≧0.03%であると、ω(Ti)/ω(N)の理想の化学的配合比を超えたTiは、固溶の形態又は微細なTiC粒子の形態で再結晶を阻害し、析出強化作用を奏する;しかし、Tiの添加量が高すぎると、結晶粒界で窒化物及び硫化物は形成され、鋼の脆化を引き起こす。よって、本発明におけるTiの含有量は≧0.03%であり、好ましくは0.03~0.10%である。
(1)本発明にかかる製造プロセスは、Ti微量合金化鋼コイルに保温徐冷を行うことにより、鋼コイル全体の温度を均一化にし、TiCの均一的で十分な析出を促進し、且つそのサイズをナノレベルに保持し、析出強化効果向上の目的を果たす。
以下、実施例に基づいて本発明をさらに説明する。
Claims (6)
- 微量合金元素Tiが添加された溶鋼から鋳造によって鋳片を得、加熱してから、粗圧延、仕上圧延、層流冷却及び巻取りを経て熱延コイルを得、前記熱延コイルを取り外した後、前記熱延コイルに独立で密閉な保温カバーユニットを60分間以内に被せて、輸送チェインに沿って鋼コイル倉庫へ移動し、60分間以上の保温時間に達したら、前記独立で密閉な保温カバーユニットから前記熱延コイルを取り出して室温まで空冷することを含むことを特徴とする、Ti微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法;ただし、前記微量合金元素Tiの含有量は≧0.03wt%である;前記粗圧延は、温度が1000~1200℃であり、3~8パスの往復式圧延が行われ、且つ累積変形量が≧50%である;さらに、前記仕上圧延は、6~7パスの連続式圧延が行われ、且つ累積変形量が≧80%であり、仕上圧延温度が800~900℃である;巻取り温度は583~700℃であり、前記熱延コイルの前記独立で密閉な保温カバーユニット内での冷却速度は≦15℃/時間である。
- 前記微量合金元素Tiの添加量は0.03~0.10wt%であることを特徴とする、請求項1に記載のTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法。
- 前記鋳片の加熱温度は≧1200℃であり、均熱時間は≧60分間であることを特徴とする、請求項1に記載のTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法。
- 前記鋳片の加熱温度は1200~1300℃であり、均熱時間は1~2時間であることを特徴とする、請求項1に記載のTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法。
- 前記熱延コイルを取り外した後、20分間以内に前記独立で密閉な保温カバーユニットを被せることを特徴とする、請求項1に記載のTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法。
- 前記熱延コイルの保温時間は1~5時間であることを特徴とする、請求項1に記載のTi微量合金化熱間圧延高強度鋼の析出強化効果を向上させる生産方法。
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CN201710853613.3A CN107470377A (zh) | 2017-09-20 | 2017-09-20 | 钢带制造流水线在线保温缓冷装置 |
CN201710853613.3 | 2017-09-20 | ||
CN201810631903.8A CN110616301B (zh) | 2018-06-19 | 2018-06-19 | 在线提高Ti微合金化热轧高强钢析出强化效果的生产方法 |
CN201810631903.8 | 2018-06-19 | ||
PCT/CN2018/106706 WO2019057115A1 (zh) | 2017-09-20 | 2018-09-20 | 在线提高Ti微合金化热轧高强钢析出强化效果的生产方法 |
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JP2020534439A JP2020534439A (ja) | 2020-11-26 |
JPWO2019057115A5 JPWO2019057115A5 (ja) | 2022-12-23 |
JP7320513B2 true JP7320513B2 (ja) | 2023-08-03 |
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US (1) | US11384406B2 (ja) |
EP (1) | EP3686292A4 (ja) |
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CN106702118B (zh) * | 2016-12-23 | 2020-04-21 | 首钢集团有限公司 | 一种降低钛微合金化高强钢加工硬化效果的冷却工艺 |
CN113120516A (zh) * | 2021-03-22 | 2021-07-16 | 广州瑞松智能科技股份有限公司 | 用于刹车制动蹄的输送冷却物流线 |
CN113231485B (zh) * | 2021-05-07 | 2022-01-28 | 西安钢研功能材料股份有限公司 | 一种高膨胀合金无焊缝大卷重带材的制备方法 |
CN114309086B (zh) * | 2022-01-05 | 2024-02-23 | 湖南华菱涟钢特种新材料有限公司 | 一种提高Ti强化冷成型高强钢性能均匀性的制备方法 |
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