JPS5773118A - Production of clean steel - Google Patents

Production of clean steel

Info

Publication number
JPS5773118A
JPS5773118A JP14972580A JP14972580A JPS5773118A JP S5773118 A JPS5773118 A JP S5773118A JP 14972580 A JP14972580 A JP 14972580A JP 14972580 A JP14972580 A JP 14972580A JP S5773118 A JPS5773118 A JP S5773118A
Authority
JP
Japan
Prior art keywords
molten steel
added
alloy elements
vacuum
vacuum degassing
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
JP14972580A
Other languages
Japanese (ja)
Inventor
Junichi Wakita
Norio Katsuyama
Motoki Yoshida
Tadanobu Komai
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 JP14972580A priority Critical patent/JPS5773118A/en
Publication of JPS5773118A publication Critical patent/JPS5773118A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To reduce the inclusions in molten steel down to desired amts. by stirring the molten steel added with desired alloy elements under vacuum degassing treatment for the time expressed by the specific equation and at prescribed degrees of vacuum. CONSTITUTION:Desired alloy elements are added in the form of, for example, Fe- Si, Fe-Mn, Al, to molten steel. Next, the molten steel added with the alloy elements is put into a ladle, and this ladle is moved to a vacuum degassing treatment position. Thence, in a vacuum degassing vessel, it is kept at 10-30mm.Hg degrees of vacuum and the molten steel is stirred and oscillated for the time t1 minute expressed by the equation. By the above-mentioned method, the inclusions in the molten steel are reduced down to desired amts., and the molten steel of high clean liness is obtained.
JP14972580A 1980-10-25 1980-10-25 Production of clean steel Pending JPS5773118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14972580A JPS5773118A (en) 1980-10-25 1980-10-25 Production of clean steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14972580A JPS5773118A (en) 1980-10-25 1980-10-25 Production of clean steel

Publications (1)

Publication Number Publication Date
JPS5773118A true JPS5773118A (en) 1982-05-07

Family

ID=15481440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14972580A Pending JPS5773118A (en) 1980-10-25 1980-10-25 Production of clean steel

Country Status (1)

Country Link
JP (1) JPS5773118A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0445220A (en) * 1990-06-13 1992-02-14 Nippon Steel Corp Method for refining molten steel by vacuum degassing
JP2008111164A (en) * 2006-10-31 2008-05-15 Jfe Steel Kk Method of melting ultra-clean steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0445220A (en) * 1990-06-13 1992-02-14 Nippon Steel Corp Method for refining molten steel by vacuum degassing
JP2008111164A (en) * 2006-10-31 2008-05-15 Jfe Steel Kk Method of melting ultra-clean steel

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