JPS5750258A - Continuous casting method for slab - Google Patents

Continuous casting method for slab

Info

Publication number
JPS5750258A
JPS5750258A JP12407080A JP12407080A JPS5750258A JP S5750258 A JPS5750258 A JP S5750258A JP 12407080 A JP12407080 A JP 12407080A JP 12407080 A JP12407080 A JP 12407080A JP S5750258 A JPS5750258 A JP S5750258A
Authority
JP
Japan
Prior art keywords
slab
holed
inclusions
sectional area
molten steel
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP12407080A
Other languages
Japanese (ja)
Inventor
Makoto Wake
Takemasa Ono
Toshiaki Komiya
Hideyuki Takahama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP12407080A priority Critical patent/JPS5750258A/en
Publication of JPS5750258A publication Critical patent/JPS5750258A/en
Pending legal-status Critical Current

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  • Continuous Casting (AREA)

Abstract

PURPOSE: To reduce the non-metallic inclusions in the broadside end parts of a continuously cast slab efficiently by teeming molten metal into a slab casting mold through an immersion nozzle of which the cross sectional area ratio in the bottom holed part to the sectional area of side holed parts is specified and controlling the downward straightforward flow of the molten metal.
CONSTITUTION: A bottom hole is opened in a known side holed immersion nozzle 1, and the ratio Rs between the sectional area S2 in its bottom holed part and the sectinal area 2S1 of its side holes is regulated at 3W15%. When molten steel is teemed from such nozzle 1 into a mold 2, the collision position of the molten steel is shallow with the method A of this invention and this makes the floating for non- metallc inclusions advantageous and a slab material of an electric welded tube of considerably decreased non-metallic inclusions in the end parts of the slab is obtained. With a conventinal method B, the collision position of the molten steel is deep and downward straightforward flow 7 is stronger than the straightforward flow 5 of this method A, thus this method A makes the inclusions easier to float and is relatively more advantageous.
COPYRIGHT: (C)1982,JPO&Japio
JP12407080A 1980-09-09 1980-09-09 Continuous casting method for slab Pending JPS5750258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12407080A JPS5750258A (en) 1980-09-09 1980-09-09 Continuous casting method for slab

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12407080A JPS5750258A (en) 1980-09-09 1980-09-09 Continuous casting method for slab

Publications (1)

Publication Number Publication Date
JPS5750258A true JPS5750258A (en) 1982-03-24

Family

ID=14876191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12407080A Pending JPS5750258A (en) 1980-09-09 1980-09-09 Continuous casting method for slab

Country Status (1)

Country Link
JP (1) JPS5750258A (en)

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