KR20200081486A - 적어도 100 밀리미터의 두께를 갖는 강 섹션 및 그 제조 방법 - Google Patents
적어도 100 밀리미터의 두께를 갖는 강 섹션 및 그 제조 방법 Download PDFInfo
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Abstract
Description
도 2 는 규칙적으로 이격된 밴드로 배열된 석출물을 나타내는 전자 현미경 사진이다.
Claims (14)
- 적어도 100 mm 의 두께를 갖는 플랜지 부분에 각 측에서 연결된 웹 중앙 부분을 포함하는 강 섹션으로서, 상기 강 섹션은, 중량% 로,
C : 0.06 ~ 0.16 %
Mn : 1.10 ~ 2.00 %
Si : 0.10 ~ 0.40 %
Cu : 0.001 ~ 0.50 %
Ni : 0.001 ~ 0.30 %
Cr : 0.001 ~ 0.50 %
Mo : 0.001 ~ 0.20 %
V : 0.06 ~ 0.12 %
N : 0.0050% ~ 0.0200 %
Al ≤ 0.040 %
P ≤ 0.040 %
S ≤ 0.030 %
그리고 선택적으로, 중량% 로, 다음의 원소들:
Ti < 0.005 %
Nb ≤ 0.05 %
중 하나 이상,
철 및 정교화 (elaboration) 로부터의 불순물인 잔부를 포함하는 조성을 갖고, 상기 강 섹션의 미세조직은 크롬, 망간 및 철로부터 선택된 하나 이상의 금속을 또한 가능하게 포함하는 적어도 1 종의 바나듐 석출물을 함유하고, 상기 석출물은 질화물, 탄화물, 탄질화물 또는 이들의 임의의 조합으로부터 선택되며, 상기 석출물의 70 % 초과가 6 nm 미만의 평균 직경을 갖는, 강 섹션. - 제 1 항에 있어서,
상기 섹션의 조성은 다음의 관계를 만족시키는 것을 특징으로 하는, 강 섹션:
0.4 ≤ CEV ≤ 0.6
여기서, CEV = C + Mn/6 + ( Cr + Mo + V )/5 + ( Ni + Cu )/15 이다. - 제 1 항 또는 제 2 항에 있어서,
바나듐 대 질소 량의 비율이 2.5 내지 7 인 것을 특징으로 하는, 강 섹션. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
상기 플랜지 부분의 미세조직이, 표면에서부터 코어까지, 템퍼드 마텐자이트 및 가능하게는 베이나이트를 포함하는 경화 구역 및 페라이트 및 펄라이트를 포함하는 코어 구역을 함유하는 것을 특징으로 하는, 강 섹션. - 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,
상기 강 섹션은 mm2 당 적어도 500 개의 석출물의 평균 밀도를 갖는 부분을 함유하는 것을 특징으로 하는, 강 섹션. - 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,
상기 석출물의 적어도 일부가 규칙적으로 이격된 밴드들로 배치되는 것을 특징으로 하는, 강 섹션. - 제 6 항에 있어서,
상기 규칙적으로 이격된 석출물의 80 % 초과가 3 nm 미만의 평균 직경을 갖는 것을 특징으로 하는, 강 섹션. - 제 6 항 또는 제 7 항에 있어서,
상기 규칙적으로 이격된 석출물은 적어도 바나듐 및 크롬을 함유하는 것을 특징으로 하는, 강 섹션. - 제 4 항 내지 제 8 항 중 어느 한 항에 있어서,
상기 석출물의 적어도 일부가 상기 강 섹션의 코어에 위치된 페라이트 상에 무작위로 분포되는 것을 특징으로 하는, 강 섹션. - 제 9 항에 있어서,
상기 무작위로 분포된 석출물의 80 % 초과가 3.5 내지 6 nm 의 평균 직경을 갖는 것을 특징으로 하는, 강 섹션. - 제 10 항에 있어서,
상기 무작위로 분포된 석출물은 적어도 바나듐, 크롬 및 철을 함유하는 것을 특징으로 하는, 강 섹션. - 제 1 항 내지 제 11 항 중 어느 한 항에 있어서,
상기 석출물은 코어 구역에 위치되는 것을 특징으로 하는, 강 섹션. - 제 1 항 내지 제 12 항 중 어느 한 항에 있어서,
상기 플랜지 부분은 최대 140 mm 의 두께를 갖는 것을 특징으로 하는, 강 섹션. - 다음의 단계들을 포함하는 강 섹션의 제조 방법:
- 제 1 항 내지 제 3 항에 따른 조성을 갖는 강 반제품을 공급하는 단계,
- 상기 강 반제품을 1000 ℃ 초과의 온도에서 재가열하고 적어도 850°C 의 최종 압연 온도로 열간 압연하여, 열연 강 섹션을 얻는 단계,
- 제품의 전부 또는 일부의 표면층의 마텐자이트 및/또는 베이나이트 켄칭을 생성하도록 상기 열연 강 섹션을 냉각시키는 단계로서, 압연 제품의 켄칭되지 않은 부분은, 마텐자이트 및/또는 베이나이트의 켄칭된 표면층의 자기 템퍼링을 야기하고 후속 냉각 동안 섹션의 코어 부분에서 오스테나이트를 페라이트 및 탄화물로 변태시키는 것을 가능하게 하기에 충분히 높은 온도에 남고, 켄칭 후 제품의 템퍼드 표면의 최대 온도는 450 내지 650 ℃ 인, 상기 열연 강 섹션을 냉각시키는 단계.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IBPCT/IB2017/058055 | 2017-12-18 | ||
| PCT/IB2017/058055 WO2019122949A1 (en) | 2017-12-18 | 2017-12-18 | Steel section having a thickness of at least 100mm and method of manufacturing the same |
| PCT/IB2018/059909 WO2019123115A1 (en) | 2017-12-18 | 2018-12-12 | Steel section having a thickness of at least 100mm and method of manufacturing the same |
Publications (2)
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| CN110681698A (zh) * | 2019-09-30 | 2020-01-14 | 宝钢特钢韶关有限公司 | 一种38MnS6L非调质钢轧制工艺 |
| CN110714172A (zh) * | 2019-10-15 | 2020-01-21 | 石家庄钢铁有限责任公司 | 一种纵横向冲击韧性良好的大规格建筑用圆钢及生产方法 |
| CN110791708B (zh) * | 2019-11-06 | 2020-10-02 | 中天钢铁集团有限公司 | 一种汽车零部件用非调质钢及其生产工艺 |
| CN110938778A (zh) * | 2019-12-09 | 2020-03-31 | 山东钢铁股份有限公司 | 一种基于异型坯轧制成型的热轧h型钢及其制备方法 |
| CN111690801B (zh) * | 2020-05-25 | 2021-11-02 | 中天钢铁集团有限公司 | 一种获得全贝氏体组织的合金工具钢盘条生产工艺 |
| CN111809110A (zh) * | 2020-06-17 | 2020-10-23 | 包头钢铁(集团)有限责任公司 | 一种稀土处理厚规格700MPa级汽车大梁钢带及其制造方法 |
| CN113403466A (zh) * | 2021-05-20 | 2021-09-17 | 包头钢铁(集团)有限责任公司 | 一种消除钢轨脱碳层组织异常的生产方法 |
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| ZA202002399B (en) | 2021-04-28 |
| RU2750752C1 (ru) | 2021-07-02 |
| US20200340073A1 (en) | 2020-10-29 |
| CA3083365A1 (en) | 2019-06-27 |
| ES3012754T3 (en) | 2025-04-10 |
| EP3728672B1 (en) | 2024-11-27 |
| MA51301A (fr) | 2021-03-24 |
| BR112020007981B1 (pt) | 2023-11-28 |
| JP2021507091A (ja) | 2021-02-22 |
| UA124482C2 (uk) | 2021-09-22 |
| HUE069485T2 (hu) | 2025-03-28 |
| FI3728672T3 (fi) | 2024-12-30 |
| MX2020006334A (es) | 2020-09-03 |
| PL3728672T3 (pl) | 2025-02-24 |
| WO2019122949A1 (en) | 2019-06-27 |
| BR112020007981A2 (pt) | 2020-10-20 |
| MA51301B1 (fr) | 2024-12-31 |
| EP3728672A1 (en) | 2020-10-28 |
| CN111356780A (zh) | 2020-06-30 |
| CA3083365C (en) | 2022-07-26 |
| KR102513656B1 (ko) | 2023-03-24 |
| WO2019123115A1 (en) | 2019-06-27 |
| JP2022177108A (ja) | 2022-11-30 |
| JP2025004102A (ja) | 2025-01-14 |
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