JPS55145112A - Preventing method of precipitation of kish graphite on surface - Google Patents

Preventing method of precipitation of kish graphite on surface

Info

Publication number
JPS55145112A
JPS55145112A JP5285379A JP5285379A JPS55145112A JP S55145112 A JPS55145112 A JP S55145112A JP 5285379 A JP5285379 A JP 5285379A JP 5285379 A JP5285379 A JP 5285379A JP S55145112 A JPS55145112 A JP S55145112A
Authority
JP
Japan
Prior art keywords
precipitation
cast iron
kish graphite
molten cast
fe3p
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
JP5285379A
Other languages
Japanese (ja)
Inventor
Yukimichi Kita
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP5285379A priority Critical patent/JPS55145112A/en
Publication of JPS55145112A publication Critical patent/JPS55145112A/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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To prevent the precipitation of kish graphite on the surface of cast iron so as to remove the after-treating operation of the surface, by, in casting of molten cast iron of a blast furnace, conducting previously a prescribed dephosphorization of the molten cast iron, thereby decreasing the precipitation of Fe3P. CONSTITUTION:In manufacturing, for example, a heavy walled castings using blast furnace molten cast iron as a raw material, casting after the previous dephosphorization to a phosphorous content not higher than 0.18% in a ladle permits to decrease the precipitation of steadite (Fe3P) of low solidifying point, simultaneously preventing the floating of kish graphite from inside to upper surface. Hereby no pitting defects of the surface due to kish graphite are formed, so that later adjustment is removed.
JP5285379A 1979-04-28 1979-04-28 Preventing method of precipitation of kish graphite on surface Pending JPS55145112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5285379A JPS55145112A (en) 1979-04-28 1979-04-28 Preventing method of precipitation of kish graphite on surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5285379A JPS55145112A (en) 1979-04-28 1979-04-28 Preventing method of precipitation of kish graphite on surface

Publications (1)

Publication Number Publication Date
JPS55145112A true JPS55145112A (en) 1980-11-12

Family

ID=12926405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5285379A Pending JPS55145112A (en) 1979-04-28 1979-04-28 Preventing method of precipitation of kish graphite on surface

Country Status (1)

Country Link
JP (1) JPS55145112A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115216570A (en) * 2022-07-28 2022-10-21 山东钢铁股份有限公司 Method for improving graphite precipitation rate in molten iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115216570A (en) * 2022-07-28 2022-10-21 山东钢铁股份有限公司 Method for improving graphite precipitation rate in molten iron

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