JPS5756151A - Manufacture of killed steel free from segregation - Google Patents

Manufacture of killed steel free from segregation

Info

Publication number
JPS5756151A
JPS5756151A JP13059180A JP13059180A JPS5756151A JP S5756151 A JPS5756151 A JP S5756151A JP 13059180 A JP13059180 A JP 13059180A JP 13059180 A JP13059180 A JP 13059180A JP S5756151 A JPS5756151 A JP S5756151A
Authority
JP
Japan
Prior art keywords
molten steel
mold
sectional area
cooling material
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
JP13059180A
Other languages
Japanese (ja)
Inventor
Yutaka Tsuchida
Toshio Tejima
Mikio Mugita
Keitaro Yamamoto
Junzo Tamai
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP13059180A priority Critical patent/JPS5756151A/en
Publication of JPS5756151A publication Critical patent/JPS5756151A/en
Pending legal-status Critical Current

Links

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To prevent macrosegregation by inserting a prescribed amount of a cooling material in a prescribed shape into a mold rapidly a necessary time after molten steel having prescribed temperature is poured into the mold.
CONSTITUTION: Molten steel is so poured that the molten steel in a mold is 5°C higher than the starting temperature of solidification, and inclusions of the molten steel float and separate. After the separation is done enough, a cooling material which has nearly the same properties with the molten steel and is so sectioned that upper sectional area/lower sectional area ≤1 and 20W70% as long as the height of a steel ingot is inserted deeply and rapidly into the molten metal. In this case, the amount of the cooling material is so determined that total mean sectional area of cooling material/sectional area of steel ingot ≥5.6%. Consequently, the molten steel in the mold has more than one solidification starting point and the solidifiction is decentralized to prevent segregation.
COPYRIGHT: (C)1982,JPO&Japio
JP13059180A 1980-09-22 1980-09-22 Manufacture of killed steel free from segregation Pending JPS5756151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13059180A JPS5756151A (en) 1980-09-22 1980-09-22 Manufacture of killed steel free from segregation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13059180A JPS5756151A (en) 1980-09-22 1980-09-22 Manufacture of killed steel free from segregation

Publications (1)

Publication Number Publication Date
JPS5756151A true JPS5756151A (en) 1982-04-03

Family

ID=15037860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13059180A Pending JPS5756151A (en) 1980-09-22 1980-09-22 Manufacture of killed steel free from segregation

Country Status (1)

Country Link
JP (1) JPS5756151A (en)

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