KR100996395B1 - 자동차 구조 부재용 고장력 용접 강관 및 그 제조 방법 - Google Patents
자동차 구조 부재용 고장력 용접 강관 및 그 제조 방법 Download PDFInfo
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- KR100996395B1 KR100996395B1 KR1020087032204A KR20087032204A KR100996395B1 KR 100996395 B1 KR100996395 B1 KR 100996395B1 KR 1020087032204 A KR1020087032204 A KR 1020087032204A KR 20087032204 A KR20087032204 A KR 20087032204A KR 100996395 B1 KR100996395 B1 KR 100996395B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
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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
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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
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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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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- 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
- C22C38/04—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
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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
- C21D2211/005—Ferrite
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims (5)
- 질량% 로,C : 0.03 ∼ 0.24%, Si : 0.002 ∼ 0.95%,Mn : 1.01 ∼ 1.99%, Al : 0.01 ∼ 0.08%를 함유하고, 추가로 Ti : 0.041 ∼ 0.150%, Nb : 0.017 ∼ 0.150% 를 Ti + Nb : 0.08% 이상을 만족시키도록 함유하고, 불순물인 P, S, N, O 를 P : 0.019% 이하, S : 0.020% 이하, N : 0.010% 이하, O : 0.005% 이하로 조정하여 함유하고, 잔부 Fe 및 불가피적 불순물로 이루어지는 조성과, 또한 원주 방향 단면의 평균 결정 입경이 2 ∼ 8㎛ 인 페라이트상과, 그 페라이트상 이외의 제 2 상으로 이루어지고, 그 페라이트상의 조직 분율이 60 체적% 이상이고, 그 페라이트상 중에 평균 입경 2 ∼ 40㎚ 인 (Nb, Ti) 복합 탄화물이 석출되어 이루어지는 조직을 가지며, 항복 강도가 660㎫ 초과인 것을 특징으로 하는, 저온 인성, 성형성, 응력 제거 소둔 후의 내(耐)비틀림 피로 특성이 우수한 자동차 구조 부재용 고장력 용접 강관.
- 제 1 항에 있어서,상기 조성에 더하여, 추가로 질량% 로, V : 0.001 ∼ 0.150%, W : 0.001 ∼ 0.150%, Cr : 0.001 ∼ 0.45%, B : 0.0001 ∼ 0.0009%, Cu : 0.001 ∼ 0.45%, Ni : 0.001 ∼ 0.45% 중에서 선택된 1 종 또는 2 종 이상 및/또는 Ca : 0.0001 ∼ 0.005% 를 함유하는 것을 특징으로 하는 자동차 구조 부재용 고장력 용접 강관.
- 제 1 항 또는 제 2 항에 있어서,추가로 강관 내외면의 산술 평균 거칠기 (Ra) 가 2㎛ 이하, 최대 높이 거칠기 (Rz) 가 30㎛ 이하, 10 점 평균 거칠기 (Rz JIS) 가 20㎛ 이하인 것을 특징으로 하는 자동차 구조 부재용 고장력 용접 강관.
- 강관 소재에 전봉 조관 공정을 실시하여 용접 강관으로 할 때, 상기 강관 소재가, 질량% 로,C : 0.03 ∼ 0.24%, Si : 0.002 ∼ 0.95%,Mn : 1.01 ∼ 1.99%, Al : 0.01 ∼ 0.08%를 함유하고, 추가로 Ti : 0.041 ∼ 0.150%, Nb : 0.017 ∼ 0.150% 를 Ti + Nb : 0.08% 이상을 만족시키도록 함유하고, 불순물인 P, S, N, O 를 P : 0.019% 이하, S : 0.020% 이하, N : 0.010% 이하, O : 0.005% 이하로 조정하여 함유하고, 잔부 Fe 및 불가피적 불순물로 이루어지는 조성을 갖는 강 소재에, 1160 ∼ 1320℃ 로 가열하고, 980 ∼ 760℃ 범위의 온도에서 마무리 압연을 종료시키는 열간 압연과, 그 열간 압연 종료 후, 750 ∼ 650℃ 의 온도 범위에서 2s 이상의 서랭을 행하는 서랭 처리를 실시하고, 660 ∼ 510℃ 의 권취 온도에서 감는 열연 공정을 실시하여 얻어진 열연강대로서, 상기 전봉 조관 공정이, 하기 (1) 식으로 정의되는 폭 축소율을 10% 이하로 하여, 상기 강관 소재를 연속적으로 롤 성형하고 전봉 용접하여 용접 강관으로 하는 조관 공정인 것을 특징으로 하는, 660㎫ 초과의 항복 강도를 갖고, 저온 인성, 성형성, 응력 제거 소둔 후의 내비틀림 피로 특성이 우수한 자동차 구조 부재용 고장력 용접 강관의 제조 방법.기폭 수축율 (%) = [(강관 소재의 폭) - π {(강관 외경) - (강관 두께)}]/π {(강관 외경) - (강관 두께)} × (100%)………(1)
- 제 4 항에 있어서,상기 조성에 더하여, 추가로 질량% 로, V : 0.001 ∼ 0.150%, W : 0.001 ∼ 0.150%, Cr : 0.001 ∼ 0.45%, B : 0.0001 ∼ 0.0009%, Cu : 0.001 ∼ 0.45%, Ni : 0.001 ∼ 0.45% 중에서 선택된 1 종 또는 2 종 이상 및/또는 Ca : 0.0001 ∼ 0.005% 를 함유하는 것을 특징으로 하는 자동차 구조 부재용 고장력 용접 강관의 제조 방법.
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JPJP-P-2006-185810 | 2006-07-05 | ||
JP2006185810A JP4466619B2 (ja) | 2006-07-05 | 2006-07-05 | 自動車構造部材用高張力溶接鋼管およびその製造方法 |
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KR20090016746A KR20090016746A (ko) | 2009-02-17 |
KR100996395B1 true KR100996395B1 (ko) | 2010-11-24 |
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US (1) | US7887649B2 (ko) |
EP (1) | EP2050833B1 (ko) |
JP (1) | JP4466619B2 (ko) |
KR (1) | KR100996395B1 (ko) |
CN (1) | CN101484602B (ko) |
CA (1) | CA2656637C (ko) |
WO (1) | WO2008004453A1 (ko) |
Cited By (1)
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KR102443927B1 (ko) * | 2020-08-26 | 2022-09-19 | 주식회사 포스코 | 용접부 충격 인성이 우수한 열연강판 및 이의 제조방법 |
WO2024070052A1 (ja) * | 2022-09-30 | 2024-04-04 | 日本製鉄株式会社 | 鋼板 |
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JP2008013808A (ja) | 2008-01-24 |
EP2050833B1 (en) | 2017-04-19 |
JP4466619B2 (ja) | 2010-05-26 |
US20090277544A1 (en) | 2009-11-12 |
EP2050833A4 (en) | 2015-04-22 |
CA2656637A1 (en) | 2008-01-10 |
EP2050833A1 (en) | 2009-04-22 |
CA2656637C (en) | 2013-08-20 |
CN101484602A (zh) | 2009-07-15 |
CN101484602B (zh) | 2011-08-03 |
KR20090016746A (ko) | 2009-02-17 |
WO2008004453A1 (fr) | 2008-01-10 |
US7887649B2 (en) | 2011-02-15 |
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