KR20170137164A - 열연강판 및 그 제조 방법 - Google Patents
열연강판 및 그 제조 방법 Download PDFInfo
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Abstract
Description
도 2는, 고Si·고Mn 함유강에 함유되는 Sb량을 변화시켜, 열연강판을 제조한 경우의, Sb 함유량(×10-3%)과 내부 산화층의 두께(㎛)의 관계를 나타내는 도면이다.
도 3은, 상술의 Sb 미함유강 및 Sb 함유강에서의, 표층 근방의 SEM 화상이다.
Claims (17)
- 질량%로,
C:0.07~0.30%,
Si:1.0 초과~2.8%,
Mn:2.0~3.5%,
P:0.030% 이하,
S:0.010% 이하,
Al:0.01~1.0% 미만,
N:0.01% 이하,
O:0.01% 이하,
Sb:0.03~0.30%,
Ti:0~0.15%,
V:0~0.30%,
Nb:0~0.15%,
Cr:0~1.0%,
Ni:0~1.0%,
Mo:0~1.0%,
W:0~1.0%,
B:0~0.010%,
Cu:0~0.50%,
Sn:0~0.30%,
Bi:0~0.30%,
Se:0~0.30%,
Te:0~0.30%,
Ge:0~0.30%,
As:0~0.30%,
Ca:0~0.50%,
Mg:0~0.50%,
Zr:0~0.50%,
Hf:0~0.50%, 및,
희토류 원소:0~0.50%를 함유하고, 잔부는 Fe 및 불순물로 이루어지고, 식 (1)을 만족하는 화학 조성을 갖는, 열연강판.
Si+Mn≥3.20 (1)
여기서, 식 (1) 중의 원소 기호에는, 대응하는 원소의 함유량(질량%)이 대입된다. - 청구항 1에 있어서,
질량%로,
Ti:0.005~0.15%,
V:0.001~0.30%, 및,
Nb:0.005~0.15%로 이루어지는 군으로부터 선택되는 1종 또는 2종 이상을 함유하는, 열연강판. - 청구항 1 또는 청구항 2에 있어서,
질량%로,
Cr:0.10~1.0%,
Ni:0.10~1.0%,
Mo:0.01~1.0%,
W:0.01~1.0%, 및,
B:0.0001~0.010%로 이루어지는 군으로부터 선택되는 1종 또는 2종 이상을 함유하는, 열연강판. - 청구항 1 내지 청구항 3 중 어느 한 항에 있어서,
질량%로,
Cu:0.10~0.50%를 함유하는, 열연강판. - 청구항 1 내지 청구항 4 중 어느 한 항에 있어서,
질량%로,
Sn, Bi, Se, Te, Ge 및 As로 이루어지는 군으로부터 선택되는 1종 또는 2종 이상을 합계로 0.0001~0.30% 함유하는, 열연강판. - 청구항 1 내지 청구항 5 중 어느 한 항에 있어서,
질량%로,
Ca, Mg, Zr, Hf 및 희토류 원소로 이루어지는 군으로부터 선택되는 1종 또는 2종 이상을 합계로 0.0001~0.50% 함유하는, 열연강판. - 청구항 1 내지 청구항 6 중 어느 한 항에 있어서,
표면과 스케일의 사이에 0.5㎛ 이상의 두께를 갖는 Sb 농화층을 구비하는, 열연강판. - 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 열연강판의 조직에서는, 페라이트 및 펄라이트의 총면적률이 75% 이상이며,
상기 열연강판의 인장 강도가 800㎫ 이하인, 열연강판. - 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 열연강판의 조직에서는, 베이나이트 및 마텐자이트의 총면적률이 75% 이상이며,
상기 열연강판의 인장 강도가 900㎫ 이상인, 열연강판. - 청구항 1 내지 청구항 7 중 어느 한 항에 있어서,
상기 열연강판의 조직은, 베이나이트 및 마텐자이트의 총면적률이 75% 이상이며,
상기 열연강판의 인장 강도가 800㎫ 이하인, 열연강판. - 청구항 1 내지 청구항 10 중 어느 한 항에 있어서,
상기 열연강판의 내부 산화층의 두께가 5㎛ 이하인, 열연강판. - 청구항 8에 있어서,
상기 열연강판의 표면의 스케일 두께가 10㎛ 이하인, 열연강판. - 청구항 8에 있어서,
상기 열연강판의 표층의 탈탄층 두께가 20㎛ 이하인, 열연강판. - 청구항 9 또는 청구항 10에 있어서,
상기 열연강판의 표면의 스케일 두께가 7㎛ 이하인, 열연강판. - 청구항 8에 기재된 열연강판의 제조 방법으로서,
청구항 8에 기재된 화학 조성을 갖는 강재를 준비하는 공정과,
상기 강재를 1100~1350℃로 가열한 후, 열간 압연하여 강판으로 만드는 공정과,
상기 강판을, 600~750℃에서 권취하는 공정을 구비하는, 열연강판의 제조 방법. - 청구항 9에 기재된 열연강판의 제조 방법으로서,
청구항 9에 기재된 화학 조성을 갖는 강재를 준비하는 준비 공정과,
상기 강재를 1100~1350℃로 가열한 후, 열간 압연하여 강판으로 만들고, 권취 온도까지 상기 강판을 냉각하는 열간 압연 공정과,
상기 냉각 후의 상기 강판을, 150~600℃에서 권취하는 공정을 구비하는, 열연강판의 제조 방법. - 청구항 10에 기재된 열연강판의 제조 방법으로서,
청구항 10에 기재된 화학 조성을 갖는 강재를 준비하는 공정과,
상기 강재를 1100~1350℃로 가열한 후, 열간 압연하여 강판으로 만드는 공정과,
상기 강판을, 150~600℃에서 권취하는 공정과,
권취 후의 상기 강판을 550℃ 이상에서 뜨임하는 공정을 구비하는, 열연강판의 제조 방법.
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| JPJP-P-2015-083603 | 2015-04-15 | ||
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| JP2015083603 | 2015-04-15 | ||
| JP2015083604 | 2015-04-15 | ||
| PCT/JP2016/061991 WO2016167313A1 (ja) | 2015-04-15 | 2016-04-14 | 熱延鋼板及びその製造方法 |
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| US (1) | US20180100213A1 (ko) |
| EP (1) | EP3284841A4 (ko) |
| JP (1) | JP6515393B2 (ko) |
| KR (1) | KR102046544B1 (ko) |
| CN (1) | CN107532257B (ko) |
| BR (1) | BR112017021206A2 (ko) |
| MX (1) | MX2017013132A (ko) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3284841A4 (en) | 2018-12-19 |
| JP6515393B2 (ja) | 2019-05-22 |
| TWI609091B (zh) | 2017-12-21 |
| TW201706425A (zh) | 2017-02-16 |
| BR112017021206A2 (pt) | 2018-07-03 |
| US20180100213A1 (en) | 2018-04-12 |
| KR102046544B1 (ko) | 2019-11-19 |
| CN107532257A (zh) | 2018-01-02 |
| EP3284841A1 (en) | 2018-02-21 |
| MX2017013132A (es) | 2018-01-26 |
| JPWO2016167313A1 (ja) | 2018-02-15 |
| WO2016167313A1 (ja) | 2016-10-20 |
| CN107532257B (zh) | 2020-03-27 |
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