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FR2352065A1 - Free cutting steels contg. lead - where lead is added to molten steel stirred by argon injection into ladle - Google Patents

Free cutting steels contg. lead - where lead is added to molten steel stirred by argon injection into ladle

Info

Publication number
FR2352065A1
FR2352065A1 FR7615210A FR7615210A FR2352065A1 FR 2352065 A1 FR2352065 A1 FR 2352065A1 FR 7615210 A FR7615210 A FR 7615210A FR 7615210 A FR7615210 A FR 7615210A FR 2352065 A1 FR2352065 A1 FR 2352065A1
Authority
FR
France
Prior art keywords
lead
ladle
added
bath
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.)
Granted
Application number
FR7615210A
Other languages
French (fr)
Other versions
FR2352065B1 (en
Inventor
Marcel Lenne
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.)
CHIERS HAUTS FOURNEAUX
Original Assignee
CHIERS HAUTS FOURNEAUX
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 CHIERS HAUTS FOURNEAUX filed Critical CHIERS HAUTS FOURNEAUX
Priority to FR7615210A priority Critical patent/FR2352065A1/en
Publication of FR2352065A1 publication Critical patent/FR2352065A1/en
Application granted granted Critical
Publication of FR2352065B1 publication Critical patent/FR2352065B1/fr
Granted 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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • C21C7/0006—Adding metallic additives
    • C21C2007/0012—Lead

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

Lead is added to molten steel for mfg. free-cutting steels, or constructional steels, where the Pb is fed below the surface of a bath of steel in a ladle; and an inert gas is blown into the molten steel to ensure mixing and the uniform distribution of the lead. The pref. plant consists of a ladle fitted with an inlet in its base for the injection of argon to stir the bath; and the top of the ladle is convered by a lid with an axial hole for feeding a steel tube contg. Pb into the bath. The lid also has a fume extn. pipe removing vapours above the surface of the bath, i.e. fumes contg. lead oxides. Uniform distribution of an exact dose of Pb in the steel is achieved. In the case of the constructional steels, which may contain alloying elements, only Pb is added, and no S is used, as the uniform distribution of the Pb provides the properties required.
FR7615210A 1976-05-20 1976-05-20 Free cutting steels contg. lead - where lead is added to molten steel stirred by argon injection into ladle Granted FR2352065A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7615210A FR2352065A1 (en) 1976-05-20 1976-05-20 Free cutting steels contg. lead - where lead is added to molten steel stirred by argon injection into ladle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7615210A FR2352065A1 (en) 1976-05-20 1976-05-20 Free cutting steels contg. lead - where lead is added to molten steel stirred by argon injection into ladle

Publications (2)

Publication Number Publication Date
FR2352065A1 true FR2352065A1 (en) 1977-12-16
FR2352065B1 FR2352065B1 (en) 1980-12-19

Family

ID=9173403

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7615210A Granted FR2352065A1 (en) 1976-05-20 1976-05-20 Free cutting steels contg. lead - where lead is added to molten steel stirred by argon injection into ladle

Country Status (1)

Country Link
FR (1) FR2352065A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188891A1 (en) * 1984-12-28 1986-07-30 United Engineering Steels Limited Improvements in or relating to the treatment of molten metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188891A1 (en) * 1984-12-28 1986-07-30 United Engineering Steels Limited Improvements in or relating to the treatment of molten metal

Also Published As

Publication number Publication date
FR2352065B1 (en) 1980-12-19

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Legal Events

Date Code Title Description
ST Notification of lapse