KR101818386B1 - 고강도 듀플렉스 스테인레스강의 제조 방법 - Google Patents
고강도 듀플렉스 스테인레스강의 제조 방법 Download PDFInfo
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Abstract
Description
도 2 는 강의 인장 강도 (Rm) 및 연신율 (A50) 대 강의 템퍼 롤링에 의한 냉간 압하도를 나타낸다.
도 3 은 강의 내부식성을 나타낸다.
도 4 는 항복 강도 (Rp0.2) 및 연신율 (A50) 에 대한 상이한 온도에서의 10 분 열처리의 영향을 나타낸다.
Claims (13)
- 변형에 의한 TRIP (변태유기소성) 효과를 갖는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법으로서,
950 - 1,150 ℃ 의 온도 범위에서의 열처리후에 성형성을 유지한 채로 적어도 1,000 MPa 의 높은 인장강도 레벨을 갖기 위해 페라이트 오스테나이트계 듀플렉스 스테인레스강이 적어도 20% 의 압하도 (reduction degree) 로 변형되고, 20% 의 압하도에서 연신율 (A50) 이 적어도 15% 이고,
변형전의 피로 한도 (Rd50%(0%)) 와 변형후의 피로 한도 (Rd50%(TR%)) 의 비율Rd50%(TR%)/Rd50%(0%) 이 1.2 보다 큰 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항에 있어서,
40% 의 압하도에서 적어도 1,300 MPa 의 인장강도 레벨이 달성되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항에 있어서,
40% 의 압하도에서 연신율 (A50) 이 적어도 4.5% 인 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 삭제
- 제 1 항에 있어서,
변형후의 내침식성에 대한 평균 체적 마모율이 6.0 mm3/kg 미만인 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항에 있어서,
적어도 15% 의 연신율 (A50) 을 유지한 채로 강도를 더욱 개선하기 위하여 변형후에 열처리가 100℃ - 450℃ 의 온도범위내에서 실시되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 6 항에 있어서,
상기 열처리는 1초 - 20분의 기간동안 실시되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항 내지 제 3 항 및 제 5 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 페라이트 오스테나이트계 듀플렉스 스테인레스강의 변형이 템퍼 롤링에 의해 실시되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항 내지 제 3 항 및 제 5 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 페라이트 오스테나이트계 듀플렉스 스테인레스강의 변형이 텐션 레벨링에 의해 실시되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항 내지 제 3 항 및 제 5 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 페라이트 오스테나이트계 듀플렉스 스테인레스강의 변형이 롤러 레벨링에 의해 실시되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항 내지 제 3 항 및 제 5 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 페라이트 오스테나이트계 듀플렉스 스테인레스강의 변형이 드로잉에 의해 실시되는 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항 내지 제 3 항 및 제 5 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 페라이트 오스테나이트계 듀플렉스 스테인레스강은 중량% 로
0 % 초과 0.05 % 미만의 탄소 (C),
0.2 - 0.7 % 의 규소 (Si),
2 - 5 % 의 망간 (Mn),
19 - 20.5 % 의 크롬 (Cr),
0.8 - 1.5 % 의 니켈 (Ni),
0 % 초과 0.6 % 미만의 몰리브덴 (Mo),
0 % 초과 1 % 미만의 구리 (Cu),
0.16 - 0.26 % 의 질소 (N), C + N = 0.2 - 0.29%,
0 중량% 초과 0.010 중량% 미만의 황 (S),
0 중량% 초과 0.040 중량% 미만의 인 (P), S + P = 0.04 중량% 미만, 및
0 ppm 초과 100 ppm 미만의 총 산소 (O) 를 포함하고,
선택적으로 0 - 0.5 % 의 텅스텐 (W), 0 - 0.2 % 의 니오븀 (Nb), 0 - 0.1 %의 티탄 (Ti), 0 - 0.2 % 의 바나듐 (V), 0 - 0.5 % 의 코발트 (Co), 0 - 50 ppm 의 붕소 (B), 및 0 - 0.04 % 의 알루미늄 (Al) 중의 하나 또는 그 이상의 추가 원소를 포함하고,
잔부는 철 (Fe) 및 스테인레스강에서 발생하는 불가피한 불순물인 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법. - 제 1 항 내지 제 3 항 및 제 5 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 페라이트 오스테나이트계 듀플렉스 스테인레스강은 중량% 로
0 % 초과 0.05 % 미만의 탄소 (C),
0.2 - 0.7 % 의 규소 (Si),
2 - 5 % 의 망간 (Mn),
19 - 20.5 % 의 크롬 (Cr),
0.8 - 1.5 % 의 니켈 (Ni),
0 % 초과 0.6 % 미만의 몰리브덴 (Mo),
0 % 초과 1 % 미만의 구리 (Cu),
0.16 - 0.26 % 의 질소 (N) 를 포함하고,
선택적으로 0 - 0.5 % 의 텅스텐 (W), 0 - 0.2 % 의 니오븀 (Nb), 0 - 0.1 %의 티탄 (Ti), 0 - 0.2 % 의 바나듐 (V), 0 - 0.5 % 의 코발트 (Co), 0 - 50 ppm 의 붕소 (B), 및 0 - 0.04 % 의 알루미늄 (Al) 중의 하나 또는 그 이상의 추가 원소를 포함하고,
잔부는 철 (Fe) 및 스테인레스강에서 발생하는 불가피한 불순물인 것을 특징으로 하는 고강도 페라이트 오스테나이트계 듀플렉스 스테인레스강의 제조 방법.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20136257 | 2013-12-13 | ||
| FI20136257A FI127046B (en) | 2013-12-13 | 2013-12-13 | METHOD OF PRODUCING DUPLEX STAINLESS STEEL WITH HIGH RELIABILITY |
| FI20145573A FI125527B (en) | 2014-06-17 | 2014-06-17 | METHOD FOR THE PRODUCTION OF HIGH-STRENGTH DUPLEX STAINLESS STEEL |
| FI20145573 | 2014-06-17 | ||
| PCT/FI2014/050978 WO2015086903A1 (en) | 2013-12-13 | 2014-12-10 | Method for producing high-strength duplex stainless steel |
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| KR20160096685A KR20160096685A (ko) | 2016-08-16 |
| KR101818386B1 true KR101818386B1 (ko) | 2018-01-12 |
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| EP (1) | EP3080311B1 (ko) |
| JP (1) | JP6235721B2 (ko) |
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| CN (1) | CN105934525B (ko) |
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| KR101746404B1 (ko) * | 2015-12-23 | 2017-06-14 | 주식회사 포스코 | 내식성 및 가공성이 향상된 린 듀플렉스 스테인리스강 및 이의 제조 방법 |
| TWI580799B (zh) * | 2016-06-08 | 2017-05-01 | China Steel Corp | High strength and high elongation hot dip galvanized steel manufacturing method |
| DE102016110661A1 (de) * | 2016-06-09 | 2017-12-14 | Salzgitter Flachstahl Gmbh | Verfahren zur Herstellung eines kaltgewalzten Stahlbandes aus einem hochfesten, manganhaltigen Stahl |
| KR20180032430A (ko) * | 2016-09-22 | 2018-03-30 | 주식회사 성일튜브 | 차량용 고압 연료 튜브 및 그 어셈블리 |
| US11248285B2 (en) * | 2017-05-22 | 2022-02-15 | Sandvik Intellectual Property Ab | Duplex stainless steel |
| JP6986455B2 (ja) * | 2018-01-16 | 2021-12-22 | 鈴木住電ステンレス株式会社 | プレストレストコンクリート用緊張材用の二相ステンレス鋼線材、二相ステンレス鋼線及びプレストレストコンクリート用緊張材 |
| CN112893790B (zh) * | 2021-01-18 | 2021-12-14 | 燕山大学 | 一种基于铸轧短流程的匀细双相不锈钢薄带及其制备方法 |
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| WO2012143610A1 (en) * | 2011-04-18 | 2012-10-26 | Outokumpu Oyj | Method for manufacturing and utilizing ferritic-austenitic stainless steel |
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| CN102605284A (zh) * | 2011-01-25 | 2012-07-25 | 宝山钢铁股份有限公司 | 一种双相不锈钢及其制造方法 |
| WO2012143610A1 (en) * | 2011-04-18 | 2012-10-26 | Outokumpu Oyj | Method for manufacturing and utilizing ferritic-austenitic stainless steel |
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| JP2017503919A (ja) | 2017-02-02 |
| AU2014363321A1 (en) | 2016-06-23 |
| BR112016013525B1 (pt) | 2021-03-30 |
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| ES2769782T3 (es) | 2020-06-29 |
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| US10407750B2 (en) | 2019-09-10 |
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| CN105934525B (zh) | 2018-11-13 |
| MX2016007589A (es) | 2016-09-14 |
| EP3080311B1 (en) | 2019-10-30 |
| US20160319391A1 (en) | 2016-11-03 |
| EA201690955A1 (ru) | 2016-11-30 |
| CA2932068A1 (en) | 2015-06-18 |
| KR20160096685A (ko) | 2016-08-16 |
| CN105934525A (zh) | 2016-09-07 |
| JP6235721B2 (ja) | 2017-11-22 |
| TW201527540A (zh) | 2015-07-16 |
| EA033404B1 (ru) | 2019-10-31 |
| TWI655293B (zh) | 2019-04-01 |
| SI3080311T1 (sl) | 2020-02-28 |
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