KR950018579A - Ultra-high strength cold rolled steel manufacturing method with excellent ductility - Google Patents

Ultra-high strength cold rolled steel manufacturing method with excellent ductility Download PDF

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Publication number
KR950018579A
KR950018579A KR1019930029650A KR930029650A KR950018579A KR 950018579 A KR950018579 A KR 950018579A KR 1019930029650 A KR1019930029650 A KR 1019930029650A KR 930029650 A KR930029650 A KR 930029650A KR 950018579 A KR950018579 A KR 950018579A
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South Korea
Prior art keywords
rolled steel
high strength
ultra
steel sheet
cold rolled
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KR1019930029650A
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Korean (ko)
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KR960005237B1 (en
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진광근
Original Assignee
조말수
포항종합제철 주식회사
백덕현
재단법인산업과학기술연구소
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Priority to KR1019930029650A priority Critical patent/KR960005237B1/en
Publication of KR950018579A publication Critical patent/KR950018579A/en
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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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

본 발명은 강슬라브 조성, 열간압연 및 냉간압연 조건을 제어함으로써, 종래의 방법에 의하여 제조된 초고강도 냉연강판 비해 용접성, 압연성등 제조공정상 작업성이 우수하고 인장강도의 확보가 용이하며 연성이 우수한 초고강도 냉연강판의 제조방법을 제공하고자 하는데, 그 목적이 있다.The present invention by controlling the steel slab composition, hot rolling and cold rolling conditions, compared to the ultra-high strength cold-rolled steel sheet manufactured by the conventional method, excellent workability in the manufacturing process, such as weldability, rolling properties, easy to secure tensile strength and ductility To provide an excellent method for producing an ultra-high strength cold rolled steel sheet, the purpose is.

본 발명은 냉간 압연 강판의 제조방법에 있어서, 중량%로, C:0.1-0.2%, Si:0.3-1.0%, Mn:1.5-2.5%, S:0.008%이하, 산가용성 Al:0.02-0.10% 및 Mo:0.10-0.30%인 기본 조성에0.02-0.07%의 Nb 및 0.3-0.5%의 Cr을 단독 또는 복합첨가 하고, 잔부 Fe로 조성된 강 슬라브 슬라브 가열온도; 1150-1250℃, 열연마무리온도 : 880-920 ℃의 조건에서 열간압연을 하여 500-650℃에서 권취한 다음, 40-60%의 압하율로 냉간압연 하여 780-880℃의 온도에서 30초 이상 연속 소둔하고, 10℃/초 이상의 속도로 냉각한 후, 450-600℃의 온도에서 10분이내로 과시효처리하는 것을 특징으로 하는 연성이 우수한 초고강도 냉간 압연 강판의 제조방법에 관한 것을 그 요지로 한다.The present invention is a method for producing a cold rolled steel sheet, in weight%, C: 0.1-0.2%, Si: 0.3-1.0%, Mn: 1.5-2.5%, S: 0.008% or less, acid-soluble Al: 0.02-0.10 Steel slab slab heating temperature of 0.02-0.07% of Nb and 0.3-0.5% of Cr alone or in combination with a base Fe of% and Mo: 0.10-0.30%; 1150-1250 ℃, hot finishing temperature: hot rolled under the condition of 880-920 ℃ and wound at 500-650 ℃, then cold rolled at a reduction rate of 40-60% for more than 30 seconds at the temperature of 780-880 ℃ The present invention relates to a method for producing an ultra-high strength cold rolled steel sheet having excellent ductility, which is continuously annealed, cooled at a rate of 10 ° C./sec or more, and then overaged in 10 minutes at a temperature of 450-600 ° C. do.

Description

연성이 우수한 초고강도 냉연강판 제조방법Manufacturing method of super high strength cold rolled steel sheet with excellent ductility

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (1)

냉간압연 강판의 제조방법에 있어서, 중량%로, C:0.1-0.2%,Si:0.3-1.0%,Mn:1.5-2.5%,S:0.008%이하, 산가용성 Al:0.02-0.10%및 Mo:0.10-0.30%인 기본조성에 0.02-0.07%의 Nb 및 0.3-0.5%의 Cr을 단독 또는 복합첨가 하고, 잔부 Fe로 조성된 강 슬라브를 슬라브 가열온도:1150-1250℃, 열연마무리 온도:880-920℃의 조건에서 열간압연을 하여 500-650℃온도에서 권취한 다음, 40-60%의 압하율로 냉간압연하여 780-880℃의 온도에서 30초 이상 연속 소둔하고, 10℃ / 초이상의 속도로 냉각한 후, 450-600℃의 온도에서 10분이내로 과시효처리하는 것을 특징으로 하는 연성이 우수한 초고강도 냉간 압연 강판의 제조방법.In the method for producing a cold rolled steel sheet, in weight%, C: 0.1-0.2%, Si: 0.3-1.0%, Mn: 1.5-2.5%, S: 0.008% or less, acid-soluble Al: 0.02-0.10% and Mo : Slab heating temperature: 1150-1250 ° C, hot polishing temperature: steel slab composed of balance Fe alone or in combination with 0.02-0.07% Nb and 0.3-0.5% Cr in the basic composition of 0.10-0.30% Hot-rolled at 880-920 ℃ and wound at 500-650 ℃, then cold-rolled at 40-60% reduction rate and continuously annealed at 780-880 ℃ for more than 30 seconds, 10 ℃ / second After cooling at the above-mentioned speed, the super-high strength cold-rolled steel sheet having excellent ductility, characterized in that overaging treatment within 10 minutes at a temperature of 450-600 ℃. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930029650A 1993-12-24 1993-12-24 Making method of super high strength cold rolling steel sheet KR960005237B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930029650A KR960005237B1 (en) 1993-12-24 1993-12-24 Making method of super high strength cold rolling steel sheet

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Application Number Priority Date Filing Date Title
KR1019930029650A KR960005237B1 (en) 1993-12-24 1993-12-24 Making method of super high strength cold rolling steel sheet

Publications (2)

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KR950018579A true KR950018579A (en) 1995-07-22
KR960005237B1 KR960005237B1 (en) 1996-04-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100481364B1 (en) * 2000-12-05 2005-04-08 주식회사 포스코 A method for manufacturing high strength cold rolled steel sheet with excellent workability
KR100496565B1 (en) * 2000-12-20 2005-06-23 주식회사 포스코 The making method for the cold rolled high strength sheet steel with excellent ductility

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101467064B1 (en) * 2012-12-26 2014-12-01 현대제철 주식회사 HIGH STRENGTH COLD-ROLLED STEEL SHEET FOR CAR HAVING 1180 MPa GRADE IN TENSILE STRENGTH AND METHOD OF MANUFACTURING THE SAME
CN109371325A (en) * 2018-11-30 2019-02-22 宝山钢铁股份有限公司 A kind of electrogalvanized thermoforming steel plate that cold-bending property is excellent or steel band and its manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100481364B1 (en) * 2000-12-05 2005-04-08 주식회사 포스코 A method for manufacturing high strength cold rolled steel sheet with excellent workability
KR100496565B1 (en) * 2000-12-20 2005-06-23 주식회사 포스코 The making method for the cold rolled high strength sheet steel with excellent ductility

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