FR2259153A1 - Low-carbon chrome steel and chrome-iron alloys - obtd by decarbonisation of high carbon chrome-iron - Google Patents

Low-carbon chrome steel and chrome-iron alloys - obtd by decarbonisation of high carbon chrome-iron

Info

Publication number
FR2259153A1
FR2259153A1 FR7502280A FR7502280A FR2259153A1 FR 2259153 A1 FR2259153 A1 FR 2259153A1 FR 7502280 A FR7502280 A FR 7502280A FR 7502280 A FR7502280 A FR 7502280A FR 2259153 A1 FR2259153 A1 FR 2259153A1
Authority
FR
France
Prior art keywords
chrome
iron
carbon
low
alloys
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.)
Withdrawn
Application number
FR7502280A
Other languages
French (fr)
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Publication of FR2259153A1 publication Critical patent/FR2259153A1/en
Withdrawn legal-status Critical Current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
    • C21C7/06—Deoxidising, e.g. killing
    • 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

Abstract

Low-carbon chrome steel or chrome-iron alloys are made from a chromium-iron mixture rich in carbon, with minimal transfer of Cr to the slag layer, by passing O2 and a finely divided carbonaceous material, e.g. powdered coal, in a carrier gas, e.g. CO2, through adjacent feeder pipes into the molten metal. As the C content of the melt is lowered from 0.2 to 0.05% the gas flows are adjusted so that the molar ratio O2:C gradually changes from an initial 1:0.1 to a final 1:0.9. Gas feed is 3-100 l per kg of carbonaceous material. High quality low carbon Fe/Cr alloys can be made from the product of reducing chromite with C instead of the more expensive alumino-thermic reduction.
FR7502280A 1974-01-28 1975-01-24 Low-carbon chrome steel and chrome-iron alloys - obtd by decarbonisation of high carbon chrome-iron Withdrawn FR2259153A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742403902 DE2403902C2 (en) 1974-01-28 1974-01-28 Process for the production of low carbon chrome steels and ferrochrome alloys

Publications (1)

Publication Number Publication Date
FR2259153A1 true FR2259153A1 (en) 1975-08-22

Family

ID=5905844

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7502280A Withdrawn FR2259153A1 (en) 1974-01-28 1975-01-24 Low-carbon chrome steel and chrome-iron alloys - obtd by decarbonisation of high carbon chrome-iron

Country Status (7)

Country Link
JP (1) JPS50108116A (en)
BE (1) BE824803A (en)
DE (1) DE2403902C2 (en)
FR (1) FR2259153A1 (en)
IT (1) IT1028490B (en)
LU (1) LU71730A1 (en)
SE (1) SE7500450L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476140A1 (en) * 1979-12-01 1981-08-21 Nippon Steel Corp PROCESS FOR THE PRODUCTION OF HIGH CHROMIUM STEEL

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5432119A (en) * 1977-08-17 1979-03-09 Sumitomo Metal Ind Ltd Refining method for high chromium steel
JPS62284037A (en) * 1986-06-03 1987-12-09 Kawasaki Steel Corp Manufacture of medium-or low-carbon ferroalloy by means of vertical smelting furnace
DE3708730A1 (en) * 1987-03-18 1988-09-29 Kloeckner Stahl Gmbh Method for recycling precipitator dusts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476140A1 (en) * 1979-12-01 1981-08-21 Nippon Steel Corp PROCESS FOR THE PRODUCTION OF HIGH CHROMIUM STEEL

Also Published As

Publication number Publication date
BE824803A (en) 1975-05-15
IT1028490B (en) 1979-01-30
LU71730A1 (en) 1975-06-24
SE7500450L (en) 1975-07-29
DE2403902C2 (en) 1982-09-16
JPS50108116A (en) 1975-08-26
DE2403902A1 (en) 1975-08-07

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Legal Events

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