KR960037851A - Hot-annealed cold rolled steel sheet excellent in formability and hardening hardening and its manufacturing method - Google Patents

Hot-annealed cold rolled steel sheet excellent in formability and hardening hardening and its manufacturing method Download PDF

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Publication number
KR960037851A
KR960037851A KR1019950009670A KR19950009670A KR960037851A KR 960037851 A KR960037851 A KR 960037851A KR 1019950009670 A KR1019950009670 A KR 1019950009670A KR 19950009670 A KR19950009670 A KR 19950009670A KR 960037851 A KR960037851 A KR 960037851A
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South Korea
Prior art keywords
hardening
formability
rolled
manufacturing
rolled steel
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KR1019950009670A
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Korean (ko)
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KR0143469B1 (en
Inventor
한성호
김흥섭
정우창
최병섭
Original Assignee
김만제
포항종합제철 주식회사
신창식
재단법인 산업과학기술연구소
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Priority to KR1019950009670A priority Critical patent/KR0143469B1/en
Publication of KR960037851A publication Critical patent/KR960037851A/en
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Publication of KR0143469B1 publication Critical patent/KR0143469B1/en

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Classifications

    • 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
    • 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
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

본 발명은 자동차의 내외판재등에 사용되는 성형성 및 소부경화성이 우수한 상소둔형 냉연강판 및 그 제조방법에 관한 것으로 P 첨가 저탄소강 Al-킬드강의 합금성분 및 그 함량을 조절하고, 제조조건을 제어하여 기존의 상소둔재와는 다른 동축립의 미세조직을 형성시키므로서 성형성이 우수하며, 4.0㎏f/㎟ 이상의 소부경화량을 가진 인장강도 30∼35㎏f/㎟ 급의 냉연강판 그 제조방법을 제공하고자 하는데 그 목적이 있다.The present invention relates to an annealing cold rolled steel sheet having excellent formability and hardening hardening property used in interior and exterior sheet materials of automobiles, and a method of manufacturing the same. The alloy composition and content of P-added low carbon steel Al-kilted steel are controlled and manufacturing conditions are controlled. It is excellent in formability by forming microstructures of coaxial grains different from those of conventional annealing materials, and has a method of manufacturing cold rolled steel sheets having a tensile strength of 30 to 35 kgf / mm2 with a hardening hardness of 4.0 kgf / mm2 or more. The purpose is to provide.

상기한 목적을 달성하기 위한 본 발명은 중량％로, C : 0.005∼0.025％, Mn : 0.1∼0.4％, P : 0.04∼0.09％, S : 0.013％ 이하, Sol.Al : 0.02∼0.08％, N : 0.0012％ 이하, 나머지 Fe 및 기타 불가피한 불순물로 조성되고, 그 조직이 등축정인 성형성 및 소부경화성이 우수한 상소둔형 냉연강판 및 상기와 같이 조성되는 강을 1200℃이상의 온도에서 균질화 열처리하고 900∼950℃이 온도범위에서 마무리 열간압연한 후, 600℃ 이하의 온도범위에서 권취하고 냉간압연한 다음, 650∼740℃의 온도범위에서 상소둔하고 조질압연하여 성형성 및 소부경화성이 우수한 상소둔형 냉연강판의 제조방법을 제공함을 그 요지로 한다.The present invention for achieving the above object is by weight%, C: 0.005 to 0.025%, Mn: 0.1 to 0.4%, P: 0.04 to 0.09%, S: 0.013% or less, Sol.Al: 0.02 to 0.08%, N: 0.0012% or less, the remaining annealing-type cold-rolled steel sheet composed of the remaining Fe and other unavoidable impurities, and excellent in formability and hardening hardenability, whose structure is equiaxed, and the steel formed as described above, after homogenizing heat treatment at a temperature of 1200 ° C or higher, After hot-rolled at 950 ° C in the temperature range, it is wound up and cold-rolled at a temperature in the range of 600 ° C or less, and then annealed and temper-rolled in the temperature range of 650-740 ° C. Its main purpose is to provide a method for producing the same.

Description

성형성 및 소부경화성이 우수한 상소둔형 냉연강판 및 그 제조방법Hot-annealed cold rolled steel sheet excellent in formability and hardening hardening and its manufacturing method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 범위를 만족하는 발명예 및 본 발명의 범위를 벗어나는 비교예의 미세조직 사진.Figure 1 is a microstructure photograph of the invention examples satisfying the scope of the present invention and comparative examples outside the scope of the present invention.

Claims (2)

중량％로, C : 0.005∼0.025％, Mn : 0.1∼0.4％, P : 0.04∼0.09％, S : 0.013％ 이하, Sol.Al : 0.02∼0.08％, N : 0.0012％ 이하, 나머지 Fe 및 기타 불가피한 불순물로 조성되고, 그 조직이 등축정인 것을 특징으로 하는 성형성 및 소부경화성이 우수한 상소둔형 냉연강판.By weight%, C: 0.005 to 0.025%, Mn: 0.1 to 0.4%, P: 0.04 to 0.09%, S: 0.013% or less, Sol.Al: 0.02 to 0.08%, N: 0.0012% or less, remaining Fe and others An annealing cold rolled steel sheet excellent in formability and hardening hardenability, which is composed of unavoidable impurities and whose structure is equiaxed crystal. 중량％로, C : 0.005∼0.025％, Mn : 0.1∼0.4％, P : 0.04∼0.09％, S : 0.013％, Sol.Al : 0.02∼0.08％, N : 0.0012％ 이하, 나머지 Fe 및 기타 불가피한 불순물로 조성되는 강을 1200℃이상의 온도에서 균질화 열처리하고 900∼950℃이 온도범위에서 마무리 열간압연한 후, 600℃ 이하의 온도범위에서 권취하고 냉간압연한 다음, 650∼740℃의 온도범위에서 상소둔하고 조질압연하는 것을 포함하여 이루어짐을 특징으로 하는 성형성 및 소부경화성이 우수한 상소둔형 냉연강판의 제조방법.By weight%, C: 0.005-0.025%, Mn: 0.1-0.4%, P: 0.04-0.09%, S: 0.013%, Sol.Al: 0.02-0.08%, N: 0.0012% or less, remaining Fe and other unavoidable Homogenized heat-treated steel at impurity temperature of 1200 ℃ or higher and finishing hot rolling at 900 ~ 950 ℃ in the temperature range, then wound and cold-rolled in the temperature range of 600 ℃ or lower, and then in the temperature range of 650 ~ 740 ℃ Process for producing an annealing-type cold rolled steel sheet excellent in formability and baking hardening, characterized in that it comprises annealing and temper rolling. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950009670A 1995-04-24 1995-04-24 The making method of cold rolling steel plate with forming KR0143469B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950009670A KR0143469B1 (en) 1995-04-24 1995-04-24 The making method of cold rolling steel plate with forming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950009670A KR0143469B1 (en) 1995-04-24 1995-04-24 The making method of cold rolling steel plate with forming

Publications (2)

Publication Number Publication Date
KR960037851A true KR960037851A (en) 1996-11-19
KR0143469B1 KR0143469B1 (en) 1998-08-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100759197B1 (en) * 2006-06-30 2007-09-14 현대하이스코 주식회사 Baf heat treating method for ultra deep drawing cold rolled steel sheet

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100514788B1 (en) * 2000-12-05 2005-09-14 주식회사 포스코 A method for manufacturing cold rolled steel sheets having superior surface quality
KR100920598B1 (en) * 2006-08-25 2009-10-08 주식회사 포스코 Bake-Hardenable Cold Rolled Steel Sheet with Superior Strength, Galvannealed Steel Sheet Using the Cold Rolled Steel Sheet and Method for Manufacturing the Cold Rolled Steel Sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100759197B1 (en) * 2006-06-30 2007-09-14 현대하이스코 주식회사 Baf heat treating method for ultra deep drawing cold rolled steel sheet

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