KR860002324A - Manufacturing method of cast steel for soft thin steel sheet - Google Patents

Manufacturing method of cast steel for soft thin steel sheet

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Publication number
KR860002324A
KR860002324A KR1019840005560A KR840005560A KR860002324A KR 860002324 A KR860002324 A KR 860002324A KR 1019840005560 A KR1019840005560 A KR 1019840005560A KR 840005560 A KR840005560 A KR 840005560A KR 860002324 A KR860002324 A KR 860002324A
Authority
KR
South Korea
Prior art keywords
molten steel
content
steel
degassing
slag
Prior art date
Application number
KR1019840005560A
Other languages
Korean (ko)
Other versions
KR880002484B1 (en
Inventor
손재웅, (외 3)
Original Assignee
고준식
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.)
Filing date
Publication date
Application filed by 고준식, 포항종합제철 주식회사 filed Critical 고준식
Priority to KR1019840005560A priority Critical patent/KR880002484B1/en
Publication of KR860002324A publication Critical patent/KR860002324A/en
Application granted granted Critical
Publication of KR880002484B1 publication Critical patent/KR880002484B1/en

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  • Treatment Of Steel In Its Molten State (AREA)

Abstract

내용 없음No content

Description

연질(軟質) 박강판용 연주주편(延鑄鑄牛)의 제조방법Manufacturing method of cast steel for soft thin steel sheet

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

제1도는 탈산제 투입시 탈산효율에 미치는 슬래그 탈산의 영향을 나타내는 그래프.1 is a graph showing the effect of slag deoxidation on the deoxidation efficiency when the deoxidizer is added.

제2도는 슬래그 탈산에 따른 감압처리후의 산소거동을 나타내는 그래프.2 is a graph showing the oxygen behavior after decompression treatment according to slag deoxidation.

제3도는 주편핀홀 발생과 전산소[O]t 수준과의 관계를 나타내는 그래프.3 is a graph showing the relationship between cast pinhole generation and the level of oxygen [O] t.

Claims (2)

전로출강시 래들에 유입된 슬래그를 탈산하여 슬래그중의 T.Fe+MnO의 함량을 10% 이하로하는 제1공정과, 슬래그탈산을 실시한 용강을 통상의 감압처리방법으로 탈가스 처리를 하되 초기[C]함량 및 탈탄반응에 따라 아르곤 가스유량을 350-500Nl/min 범위에서 조절하면서 용강에 취입하고 탈가스 말기(탈탄반응말기)에 탈산제를 첨가하여 용강을 탈단하는 제2공정과, 탈가스처리를 실시한 용강을 연속주조하된 주조속도초기, 연연주 래들교체시점 되는 주조말기의 주조불안정 시점에 턴디쉬 또는 몰드내에 강중[Ca] 함량이 4-1-ppm이 되도록 Ca-Al 절단편을 투입하여 연속주조하는 제3공정으로 이루어져 [C] 함량이 0.02-0.05%로 됨을 특징으로 하는 연질 박강판용 연주주편을 제조하는 방법.Degassing the slag introduced into the ladle when the converter descends to degas the first step to reduce the T.Fe + MnO content in the slag to 10% or less, and to perform degassing of the molten steel subjected to the slag desulfurization using a conventional depressurization treatment method. The second step of degassing molten steel by blowing the molten steel into the molten steel while controlling the argon gas flow rate in the range of 350-500 Nl / min according to the [C] content and the decarburization reaction, Ca-Al cut pieces are made so that the steel [Ca] content is 4-1-ppm in the tundish or mold at the time of casting instability at the beginning of casting speed and continuous casting ladle when molten steel is continuously Method for producing a soft cast steel cast piece, characterized in that the [C] content is 0.02-0.05% consisting of a third step of continuous casting by adding. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019840005560A 1984-09-12 1984-09-12 Making process of billet for soft steel sheet by wntinuous casting KR880002484B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019840005560A KR880002484B1 (en) 1984-09-12 1984-09-12 Making process of billet for soft steel sheet by wntinuous casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019840005560A KR880002484B1 (en) 1984-09-12 1984-09-12 Making process of billet for soft steel sheet by wntinuous casting

Publications (2)

Publication Number Publication Date
KR860002324A true KR860002324A (en) 1986-04-24
KR880002484B1 KR880002484B1 (en) 1988-11-19

Family

ID=19235371

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840005560A KR880002484B1 (en) 1984-09-12 1984-09-12 Making process of billet for soft steel sheet by wntinuous casting

Country Status (1)

Country Link
KR (1) KR880002484B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100524606B1 (en) * 2001-12-15 2005-11-02 주식회사 포스코 Method for manufacturing high quality al-killed steel utilizing ca-al alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100524606B1 (en) * 2001-12-15 2005-11-02 주식회사 포스코 Method for manufacturing high quality al-killed steel utilizing ca-al alloy

Also Published As

Publication number Publication date
KR880002484B1 (en) 1988-11-19

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