FR2160356A1 - Decarburising chromium contg ferrous melts - avoiding oxidation and loss of the chromium - Google Patents

Decarburising chromium contg ferrous melts - avoiding oxidation and loss of the chromium

Info

Publication number
FR2160356A1
FR2160356A1 FR7221011A FR7221011A FR2160356A1 FR 2160356 A1 FR2160356 A1 FR 2160356A1 FR 7221011 A FR7221011 A FR 7221011A FR 7221011 A FR7221011 A FR 7221011A FR 2160356 A1 FR2160356 A1 FR 2160356A1
Authority
FR
France
Prior art keywords
chromium
decarburising
contg
loss
injection
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
FR7221011A
Other languages
French (fr)
Other versions
FR2160356B1 (en
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.)
Air Liquide SA
Original Assignee
Air Liquide SA
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 Air Liquide SA filed Critical Air Liquide SA
Priority to FR7221011A priority Critical patent/FR2160356A1/en
Publication of FR2160356A1 publication Critical patent/FR2160356A1/en
Application granted granted Critical
Publication of FR2160356B1 publication Critical patent/FR2160356B1/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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel

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)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Process for treating molten metals, partic decarburising Cr contg. ferrous metals by injecting a reactive gaseous O2 current into the melt, in which O2 injection is periodically interrupted for periods during which a neutral gas e.g. Ar is injected. Pref. injection of the neutral gas is started immediately after O2 injection is interrupted and vice-versa and the O2/Ar injection cycle lasts 2-4 secs.
FR7221011A 1972-06-12 1972-06-12 Decarburising chromium contg ferrous melts - avoiding oxidation and loss of the chromium Granted FR2160356A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7221011A FR2160356A1 (en) 1972-06-12 1972-06-12 Decarburising chromium contg ferrous melts - avoiding oxidation and loss of the chromium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7221011A FR2160356A1 (en) 1972-06-12 1972-06-12 Decarburising chromium contg ferrous melts - avoiding oxidation and loss of the chromium

Publications (2)

Publication Number Publication Date
FR2160356A1 true FR2160356A1 (en) 1973-06-29
FR2160356B1 FR2160356B1 (en) 1974-10-04

Family

ID=9100026

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7221011A Granted FR2160356A1 (en) 1972-06-12 1972-06-12 Decarburising chromium contg ferrous melts - avoiding oxidation and loss of the chromium

Country Status (1)

Country Link
FR (1) FR2160356A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989004377A1 (en) * 1987-11-12 1989-05-18 Mannesmann Ag Process for oxidizing treatment of steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989004377A1 (en) * 1987-11-12 1989-05-18 Mannesmann Ag Process for oxidizing treatment of steel

Also Published As

Publication number Publication date
FR2160356B1 (en) 1974-10-04

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Legal Events

Date Code Title Description
ST Notification of lapse