KR100925608B1 - 저온인성이 우수한 950MPa급 이상의 초고강도용접이음부 - Google Patents
저온인성이 우수한 950MPa급 이상의 초고강도용접이음부 Download PDFInfo
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- KR100925608B1 KR100925608B1 KR1020070081137A KR20070081137A KR100925608B1 KR 100925608 B1 KR100925608 B1 KR 100925608B1 KR 1020070081137 A KR1020070081137 A KR 1020070081137A KR 20070081137 A KR20070081137 A KR 20070081137A KR 100925608 B1 KR100925608 B1 KR 100925608B1
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- South Korea
- Prior art keywords
- high strength
- temperature toughness
- less
- low temperature
- welded joint
- Prior art date
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- 239000002184 metal Substances 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 12
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 20
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000010953 base metal Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 241000238633 Odonata Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
강판 | 화학성분 (wt. %) | 기계적 특성 | ||||||||
C | Si | Mn | P | S | Cr+Mo+V | Ni+Cu | Ceq | TS (MPa) | vE-30℃ (J) | |
A | 0.05 | 0.15 | 1.9 | 0.006 | 0.001 | 0.64 | 0.5 | 0.52 | 1018 | 240 |
B | 0.09 | 0.15 | 1.9 | 0.005 | 0.001 | 0.64 | 0.2 | 0.55 | 1077 | 186 |
용가재 | 화학성분(Wt.%) | ||||
C | Si | Mn | Ni | Cr+Mo+V | |
a | 0.06 | 0.51 | 1.6 | 2.0 | 0.53 |
b | 0.08 | 0.40 | 2.6 | 5.7 | 2.34 |
c | 0.07 | 0.44 | 2.3 | 4.5 | 1.74 |
분실시 번호 | 강판 | 용가재 | 용접 입열량 (kJ/mm) | 용접금속 특성 | ||||||||
화학성분 | 조직분율 | 기계적 특성 | ||||||||||
C | Mn | Cr+Mo +V | Ni+Cu | Ceq | 마르텐 사이트 (%) | AF+B (%) | TS (MPa) | vE- 30℃ (J) | ||||
1 | A | b | 5.0 | 0.07 | 1.8 | 1.33 | 2.5 | 0.8 | 19 | 81 | 1096 | 126 |
2 | A | c | 2.8 | 0.07 | 1.9 | 1.0 | 2.3 | 0.74 | 12 | 88 | 988 | 130 |
3 | A | c | 3.2 | 0.07 | 1.9 | 1.1 | 2.2 | 0.75 | 17 | 83 | 1004 | 144 |
4 | B | a | 2.0 | 0.09 | 2.2 | 0.68 | 1.55 | 0.70 | 11 | 89 | 963 | 98 |
5 | B | c | 3.2 | 0.08 | 1.9 | 1.1 | 1.9 | 0.74 | 12 | 88 | 971 | 106 |
6 | A | a | 3.2 | 0.06 | 1.7 | 0.55 | 1.2 | 0.52 | 0 | 100 | 898 | 94 |
7 | A | b | 3.2 | 0.08 | 2.2 | 1.45 | 3.3 | 0.94 | 76 | 24 | 1114 | 65 |
8 | B | a | 3.2 | 0.08 | 1.7 | 0.6 | 1.1 | 0.55 | 0 | 100 | 904 | 43 |
9 | B | b | 3.2 | 0.1 | 2.2 | 1.41 | 2.9 | 0.95 | 84 | 16 | 1102 | 50 |
Claims (3)
- 용접구조체의 용접이음부에 있어서, 모재와 용가재에 의해 형성되는 용접금속이 하기 (1)식에서 나타난 탄소당량 Ceq 값 0.7~0.8%의 범위 안에 있고, 조직은 80~90면적%의 침상 페라이트(Acicular ferrite)와 베이나이트 및 10~20 면적%의 마르텐사이트의 혼합조직으로 이루어지는 저온인성이 우수한 950MPa급 이상의 초고강도 용접이음부.Ceq = [C] + [Mn]/6 + ([Cr] + [Mo] + [V])/5 + ([Ni] + [Cu])/15) … (1)단, [C], [Mn], [Cr], [Mo], [V], [Ni] 및 [Cu]는, 각각 C, Mn, Cr, Mo, V, Ni 및 Cu의 함량(중량%)을 나타낸다.
- 제 1항에 있어서, 상기 모재는 중량%로, C: 0.03~0.10%, Si: 0.6% 이하, Mn: 1.6~2.1%, Cu: 1.0% 이하, Ni: 1.0% 이하, Nb: 0.01~0.06%, V: 0.01~0.1%, Mo: 0.1 ~0.5%, Cr: 1.0% 이하, Ti: 0.005~0.03%, Al: 0.001~0.06%, B: 0.0005~0.0025%, N: 0.001~0.006%, P: 0.02% 이하, S: 0.005% 이하, Ca: 0.006% 이하, 나머지 Fe 및 기타 불가피한 불순물로 이루어진 저온인성이 우수한 950MPa급 이상의 초고강도 용접이음부.
- 제 1항 또는 제 2항에 있어서, 상기 용가재는 중량%로, C: 0.05~0.1%, Si: 0.3~0.6%, Mn: 1.0~3.0%, Ni: 1.5~6.0%, Cr+Mo+V: 0.5~2.5%, N: 0.006% 이하, P: 0.02% 이하, S: 0.005% 이하, O: 0.03% 이하, 나머지 Fe 및 기타 불가피한 불순물로 이루어진 저온인성이 우수한 950MPa급 이상의 초고강도 용접이음부.
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KR1020070081137A KR100925608B1 (ko) | 2007-08-13 | 2007-08-13 | 저온인성이 우수한 950MPa급 이상의 초고강도용접이음부 |
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KR1020070081137A KR100925608B1 (ko) | 2007-08-13 | 2007-08-13 | 저온인성이 우수한 950MPa급 이상의 초고강도용접이음부 |
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KR100925608B1 true KR100925608B1 (ko) | 2009-11-06 |
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Cited By (2)
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---|---|---|---|---|
WO2014081246A1 (ko) * | 2012-11-22 | 2014-05-30 | 주식회사 포스코 | 극저온강의 용접이음부 및 이를 제조하기 위한 용접 재료 |
WO2015083930A1 (ko) * | 2013-12-06 | 2015-06-11 | 주식회사 포스코 | 내충격성 및 내마모성이 우수한 플럭스코어드 아크 용접재료 |
Families Citing this family (13)
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KR101317275B1 (ko) * | 2011-11-03 | 2013-10-14 | 포항공과대학교 산학협력단 | 저온인성이 우수한 고강도 강판 |
JP5935678B2 (ja) * | 2011-12-28 | 2016-06-15 | Jfeスチール株式会社 | 高靭性高張力鋼およびその製造方法 |
KR101465088B1 (ko) * | 2012-08-17 | 2014-11-26 | 포항공과대학교 산학협력단 | 저온 인성이 우수한 저탄소 고강도 강판 및 그 제조방법 |
KR101382991B1 (ko) * | 2012-12-26 | 2014-04-08 | 주식회사 포스코 | 저온인성이 우수한 초고강도 플럭스 코어드 아크 용접이음부 |
KR101449209B1 (ko) * | 2012-12-27 | 2014-10-08 | 주식회사 포스코 | 용접이음부 |
KR20140084654A (ko) * | 2012-12-27 | 2014-07-07 | 주식회사 포스코 | 충격인성이 우수한 초고강도 플럭스 코어드 아크 용접이음부 |
WO2014104731A1 (ko) | 2012-12-27 | 2014-07-03 | 주식회사 포스코 | 충격인성이 우수한 초고강도 플럭스 코어드 아크 용접이음부 및 이를 제조하기 위한 용접 와이어 |
US10266929B2 (en) | 2013-12-24 | 2019-04-23 | Posco | Ultrahigh-strength gas metal arc welded joint having excellent impact toughness, and solid wire for producing same |
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KR102109230B1 (ko) * | 2016-06-20 | 2020-05-12 | 주식회사 포스코 | 초고강도 가스 메탈 아크 용접금속부 |
CN108103393A (zh) * | 2017-06-01 | 2018-06-01 | 海宁瑞奥金属科技有限公司 | 一种高强度高韧性桥梁钢焊接接头的焊缝金属 |
KR102396818B1 (ko) * | 2020-08-18 | 2022-05-11 | 현대제철 주식회사 | 우수한 저온인성 및 저경도 특성을 가지는 서브머지드 아크 용접 금속부 및 이를 포함하는 용접 강관 |
KR102373705B1 (ko) * | 2020-10-16 | 2022-03-14 | 주식회사 포스코 | 서브머지드 아크 용접재료, 이를 이용하여 제조되는 강도 및 저온인성이 우수한 용접 이음부 및 그 제조방법 |
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- 2007-08-13 KR KR1020070081137A patent/KR100925608B1/ko active IP Right Grant
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Cited By (5)
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WO2014081246A1 (ko) * | 2012-11-22 | 2014-05-30 | 주식회사 포스코 | 극저온강의 용접이음부 및 이를 제조하기 위한 용접 재료 |
CN104797730A (zh) * | 2012-11-22 | 2015-07-22 | Posco公司 | 极低温钢的焊接接头及用于制造该焊接接头的焊接材料 |
US9981346B2 (en) | 2012-11-22 | 2018-05-29 | POSCO Gyeongsangbuk-Do | Welded joint of extremely low-temperature steel, and welding materials for preparing same |
WO2015083930A1 (ko) * | 2013-12-06 | 2015-06-11 | 주식회사 포스코 | 내충격성 및 내마모성이 우수한 플럭스코어드 아크 용접재료 |
US10279436B2 (en) | 2013-12-06 | 2019-05-07 | Posco | Flux-cored arc welding material having remarkable impact resistance and abrasion resistance |
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KR20090016854A (ko) | 2009-02-18 |
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