KR950018535A - Manufacturing method of cold rolled steel sheet with excellent press workability - Google Patents

Manufacturing method of cold rolled steel sheet with excellent press workability Download PDF

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Publication number
KR950018535A
KR950018535A KR1019930031043A KR930031043A KR950018535A KR 950018535 A KR950018535 A KR 950018535A KR 1019930031043 A KR1019930031043 A KR 1019930031043A KR 930031043 A KR930031043 A KR 930031043A KR 950018535 A KR950018535 A KR 950018535A
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KR
South Korea
Prior art keywords
less
steel sheet
steel
cold
rolled steel
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Application number
KR1019930031043A
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Korean (ko)
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KR960006024B1 (en
Inventor
정기조
김태수
Original Assignee
조말수
포항종합제철 주식회사
백덕현
재단법인산업과학기술연구소
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Priority to KR1019930031043A priority Critical patent/KR960006024B1/en
Publication of KR950018535A publication Critical patent/KR950018535A/en
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Publication of KR960006024B1 publication Critical patent/KR960006024B1/en

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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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/0236—Cold rolling
    • 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
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium

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

Abstract

본 발명은 Ti 및 Nb이 단독 또는 복합 첨가된 극저탄소 Al-킬드강의 중의 C, N, P, S의 함량을 제어함과 동시에 냉간압연 및 연속소둔 조건을 적절히 제한하여 연신율이 53% 이상 r값이 2.4 이상되는 프레스 가공성이 우수한 냉연강판을 제조하는 방법을 제공하고자 하는데, 그 목적이 있다.The present invention controls the content of C, N, P, and S in the ultra low carbon Al-kilde steel with Ti and Nb added alone or in combination, while appropriately limiting the cold rolling and continuous annealing conditions, the elongation is 53% or more. To provide a method for producing a cold rolled steel sheet having excellent press formability of 2.4 or more, the object is.

본 발명은 중량%로, C : 0.003%이하, Mn : 0.20%이하, P : 0.015%이하, S : 0.015%이하, Al : 0.03-0.05%, N : 0.004%이하, 잔부 Fe 및 기타 불가피한 원소를 포함하는 강의 출발강으로하여, 여기에 0.045% 이하의 Ti, 및 0.015% 이하의 Nb을 단독 또는 복합 첨가한 Al-킬드강 슬라브를, 통상의 조건으로 열간압연하고, 냉간압연한후 연속소둔 처리하는 냉연강판의 제조방법에 있어서, 상기 탄소와 질소 함량의 합이 0.0035% 이하이고, 동시에 상기 인과 황함량의 합이 0.012% 이하인 조건을 만족하고, 상기 냉간압연시 압연율이 80% 이상이고, 상기 연속소둔시 소둔온도가 재결정온도 ~880℃인 것을 특징으로 하는 프레스 가공성이 우수한 냉연강판의 제조방법에 관한 것을 그 요지로 한다.The present invention is by weight, C: 0.003% or less, Mn: 0.20% or less, P: 0.015% or less, S: 0.015% or less, Al: 0.03-0.05%, N: 0.004% or less, balance Fe and other unavoidable elements As a starting steel of a steel comprising, an Al-killed steel slab comprising 0.045% or less of Ti and 0.015% or less of Nb alone or in combination, hot-rolled under ordinary conditions, cold-rolled and then continuously annealed In the method for manufacturing a cold rolled steel sheet to be treated, the sum of the carbon and nitrogen content is 0.0035% or less, and at the same time, the sum of the phosphorus and sulfur content is 0.012% or less, and the cold rolling rate is 80% or more. The present invention relates to a method for producing a cold rolled steel sheet having excellent press formability, wherein the annealing temperature during continuous annealing is a recrystallization temperature of 880 ° C.

Description

프레스가공성이 우수한 냉연강판의 제조방법Manufacturing method of cold rolled steel sheet with excellent press workability

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

Claims (1)

중량%로, C : 0.003%이하, Mn : 0.20%이하, P : 0.015%이하, S : 0.015%이하, Al : 0.03-0.05%, N : 0.004%이하, 잔부 Fe 및 기타 불가피한 원소를 포함하는 강의 출발강으로하여, 여기에 0.045% 이하의 Ti, 및 0.015% 이하의 Nb을 단독 또는 복합 첨가한 Al-킬드강 슬라브를, 통상의 조건으로 열간압연하고, 냉간압연한후 연속소둔 처리하는 냉연강판의 제조방법에 있어서, 상기 탄소와 질소 함량의 합이 0.0035% 이하이고, 동시에 상기 인과 황함량의 합이 0.012% 이하인 조건을 만족하고, 상기 냉간압연시 압연율이 80% 이상이고, 상기 연속소둔시 소둔온도가 재결정온도 ~880℃인 것을 특징으로 하는 프레스 가공성이 우수한 냉연강판의 제조방법.By weight, C: 0.003% or less, Mn: 0.20% or less, P: 0.015% or less, S: 0.015% or less, Al: 0.03-0.05%, N: 0.004% or less, balance Fe and other unavoidable elements Cold-rolled steel, which is hot-rolled and subjected to continuous annealing, under normal conditions, to an Al-killed steel slab in which the starting steel of steel is added alone or in combination with 0.045% or less of Ti and 0.015% or less of Nb. In the method of manufacturing a steel sheet, the carbon and nitrogen content is 0.0035% or less, and the phosphorus and sulfur content is 0.012% or less, the cold rolling rate is 80% or more, the continuous Process for producing cold rolled steel sheet having excellent press workability, characterized in that the annealing temperature at the time of annealing is the recrystallization temperature ~ 880 ℃. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930031043A 1993-12-29 1993-12-29 Making method of cold rolling steel sheet KR960006024B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930031043A KR960006024B1 (en) 1993-12-29 1993-12-29 Making method of cold rolling steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930031043A KR960006024B1 (en) 1993-12-29 1993-12-29 Making method of cold rolling steel sheet

Publications (2)

Publication Number Publication Date
KR950018535A true KR950018535A (en) 1995-07-22
KR960006024B1 KR960006024B1 (en) 1996-05-08

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Application Number Title Priority Date Filing Date
KR1019930031043A KR960006024B1 (en) 1993-12-29 1993-12-29 Making method of cold rolling steel sheet

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100825559B1 (en) * 2001-11-22 2008-04-25 주식회사 포스코 Method of manufacturing blackplate with excellent formability

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100825559B1 (en) * 2001-11-22 2008-04-25 주식회사 포스코 Method of manufacturing blackplate with excellent formability

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Publication number Publication date
KR960006024B1 (en) 1996-05-08

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