KR970027325A - Manufacturing method of cold rolled steel sheet with excellent deep workability - Google Patents

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

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Publication number
KR970027325A
KR970027325A KR1019950045020A KR19950045020A KR970027325A KR 970027325 A KR970027325 A KR 970027325A KR 1019950045020 A KR1019950045020 A KR 1019950045020A KR 19950045020 A KR19950045020 A KR 19950045020A KR 970027325 A KR970027325 A KR 970027325A
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KR
South Korea
Prior art keywords
rolling
stand
hot
steel sheet
rolled steel
Prior art date
Application number
KR1019950045020A
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Korean (ko)
Other versions
KR100217943B1 (en
Inventor
강희재
정진환
Original Assignee
김종진
포항종합제철 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 김종진, 포항종합제철 주식회사 filed Critical 김종진
Priority to KR1019950045020A priority Critical patent/KR100217943B1/en
Publication of KR970027325A publication Critical patent/KR970027325A/en
Application granted granted Critical
Publication of KR100217943B1 publication Critical patent/KR100217943B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B2031/021—Integral tandem mill housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (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 자동차 및 가전제품에 주로 사용되는 심가공용 냉연강판의 제조방법에 관한 것이며, 보다 상세히는 냉연강판의 중간소재인 열연판 제조를 위한 마무리압연시, 스트립을 냉각제어함으로써 더욱 우수한 프레스 가공성을 갖는 냉연강판을 제조하는 방법에 관한 것이다.The present invention relates to a method for manufacturing a cold rolled steel sheet for deep processing mainly used in automobiles and home appliances, and more specifically, in the finishing rolling for manufacturing a hot rolled sheet, which is an intermediate material of the cold rolled steel sheet, by controlling the cooling of the strip to further excellent press formability It relates to a method for producing a cold rolled steel sheet having.

본 발명의 심가공성이 우수한 냉연강판의 제조방법은 중량%로 0.01%이하의 C, 0.01%이하의 S, 0.007%이하의 N을 포함하고, Ti*=Total Ti-3.43(%N)-1.5(%S)의 조건을 만족하는 유효티타늄(Ti*)량과 탄소량과의 원자당량비(Ti*/4C%)가 1이상이 되도록 조성된 통상의 Ti첨가 극저탄소강 슬라브를 열연재가열후, 열간압연기에 투입하여 조압연 직후의 온도가 1050℃이상이 되도록 압연한 다음, 계속하여 통상 6-7스탠드를 지닌 텐덤(Tandem) 형식의 압연기를 이용하여 마무리압연을 실시할 때, 마무리압연기 전단부 3번째 스탠드에서의 압연 온도가 940-980℃가 되도록 하고, 또한 압연기 1번째 스탠드 입축과 3번째 스탠드 출측에서의 열연스트립(strip)의 온도차이가 70℃이상이 되도록 물은 분사하여 냉각하면서 제어압연을 실시함으로써 열연판을 제조하고, 이 열연판을 소재로 통상의 냉연 및 연속소둔을 실시한다.The method for producing a cold rolled steel sheet having excellent deep workability according to the present invention includes C by 0.01% by weight, S by 0.01%, and N by 0.007% or less, and Ti * = Total Ti-3.43 (% N) -1.5 After hot-rolled reinforcing the ordinary Ti-added ultra-low carbon steel slab which is formed so that the atomic equivalent ratio (Ti * / 4C%) between the amount of effective titanium (Ti * ) and the amount of carbon satisfying the condition of (% S) is 1 or more, In the hot rolling mill, the temperature immediately after the rough rolling is rolled to 1050 ° C or higher, and then the finish rolling is performed using a tandem rolling mill having a normal 6-7 stand. Control rolling while spraying and cooling the water so that the rolling temperature at the third stand is 940-980 ° C, and the temperature difference between the hot roll strip of the rolling mill 1st stand and the third stand exit side is 70 ° C or more. To produce a hot rolled sheet, and the hot rolled sheet Cold rolling and continuous annealing of the bed are carried out.

Description

심가공성이 우수한 냉연강판의 제조방법Manufacturing method of cold rolled steel sheet with excellent deep workability

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

Claims (1)

중량%로 0.01%이하의 C, 0.01%이하의 S, 0.007%이하의 N을 포함하고, Ti*=Total Ti-3.43(%N)-1.5(%S)의 조건을 만족하는 유효티타늄(Ti*)량과 탄소량과의 원자당량비(Ti*/4C%)가 1이상이 되도록 조성된 통상의 Ti첨가 극저탄소강 슬라브를 열연재가열후, 열간압연기에 투입하여 조압연 직후의 온도가 1050℃이상이 되도록 압연한 다음, 계속하여 통상 6-7스탠드를 지닌 텐덤(Tandem) 형식의 압연기를 이용하여 마무리압연을 실시할 때, 마무리압연기 전단부 3번째 스탠드에서의 압연 온도가 940-980℃가 되도록 하고, 또한 압연기 1번째 스탠드 입축과 3번째 스탠드 출측에서의 열연스트립(strip)의 온도차이가 70℃이상이 되도록 물은 분사하여 냉각하면서 제어압연을 실시함으로써 열연판을 제조하고, 이 열연판을 소재로 통상의 냉연 및 연속소둔을 실시하는 것을 특징으로 하는 심가공성이 우수한 냉연강판의 제조방법.Effective titanium (Ti) containing 0.01% or less of C, 0.01% or less of S, N of 0.007% or less, and satisfying the conditions of Ti * = Total Ti-3.43 (% N) -1.5 (% S) * ) A normal Ti-added ultra-low carbon steel slab formulated so that the atomic equivalent ratio (Ti * / 4C%) between carbon content and carbon content is 1 or more is heated to a hot rolling mill after heating, and the temperature immediately after rough rolling is 1050 ° C. When rolling is carried out to the above and subsequently finish rolling using a Tandem type rolling mill having a normal 6-7 stand, the rolling temperature at the third stand of the front end of the finishing mill is 940-980 ° C. The hot rolled sheet is manufactured by controlling rolling while spraying and cooling water so that the temperature difference between the hot roll strip of the rolling mill 1st stand and the 3rd stand exit is 70 ° C or higher. Normal cold rolling and continuous annealing are performed on the material. The method of producing a cold-rolled steel sheet excellent seam workability. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950045020A 1995-11-29 1995-11-29 Method for manufacturing cold rolled steel sheet KR100217943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950045020A KR100217943B1 (en) 1995-11-29 1995-11-29 Method for manufacturing cold rolled steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950045020A KR100217943B1 (en) 1995-11-29 1995-11-29 Method for manufacturing cold rolled steel sheet

Publications (2)

Publication Number Publication Date
KR970027325A true KR970027325A (en) 1997-06-24
KR100217943B1 KR100217943B1 (en) 1999-09-01

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KR1019950045020A KR100217943B1 (en) 1995-11-29 1995-11-29 Method for manufacturing cold rolled steel sheet

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100282192B1 (en) * 1996-11-27 2001-02-15 이구택 Manufacturing method of cold rolled steel sheet for deep processing with excellent fatigue characteristics and secondary workability

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9962760B2 (en) 2009-02-09 2018-05-08 Toho Titanium Co., Ltd. Titanium slab for hot rolling produced by electron-beam melting furnace, process for production thereof, and process for rolling titanium slab for hot rolling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100282192B1 (en) * 1996-11-27 2001-02-15 이구택 Manufacturing method of cold rolled steel sheet for deep processing with excellent fatigue characteristics and secondary workability

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Publication number Publication date
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