GB1430375A - Process for the manufacture of low-carbon ferritic steel with a high chromium content - Google Patents

Process for the manufacture of low-carbon ferritic steel with a high chromium content

Info

Publication number
GB1430375A
GB1430375A GB4046073A GB4046073A GB1430375A GB 1430375 A GB1430375 A GB 1430375A GB 4046073 A GB4046073 A GB 4046073A GB 4046073 A GB4046073 A GB 4046073A GB 1430375 A GB1430375 A GB 1430375A
Authority
GB
United Kingdom
Prior art keywords
melt
carbon
steel
low
nitrogen
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.)
Expired
Application number
GB4046073A
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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke 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 Kloeckner Werke AG filed Critical Kloeckner Werke AG
Publication of GB1430375A publication Critical patent/GB1430375A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/005—Manufacture of stainless steel

Landscapes

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

Abstract

1430375 Making ferritic stainless steel KLOCKNER-WERKE AG 28 Aug 1973 [15 Sept 1972] 40460/73 Heading C7D Low carbon ferritic stainless steel of composition 12 to 23% Cr and 0À01 to 0À08% C is prepared by oxidizing low phosphorus crude iron to form a low nitrogen mild steel in a bottom or side blowing converter, deslagging the steel melt, heating the deslagged melt whilst adding lime and heating agents (e.g. Si, Al, CaSi) to a temperature above 1700‹C and then alloying with ferrochrome without interruption of the oxygen flow so that the carbon content of the melt does not exceed 0À5% and subsequently supplying an inert gas (e.g. argon, nitrogen or mixture thereof) to the oxygen stream so that the carbon monoxide partial pressure does not exceed 76 Torr where a final carbon content of 0À01 to 0À02% is required. The preoxidizing and deslagging steps may be dispensed with by using preoxidized and slag free B.O.F. steel and the chromium containing slag present after the completion of the oxidation process may be reduced using carbon free reducing agents (e.g. FeSi, CaSi and Al) while blowing in argon or nitrogen or a mixture thereof. Alloying elements for correction of the final analysis (e.g. Si, Mn or Cr) may be added to the melt during or after the slag removal.
GB4046073A 1972-09-07 1973-08-28 Process for the manufacture of low-carbon ferritic steel with a high chromium content Expired GB1430375A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722243839 DE2243839A1 (en) 1972-09-07 1972-09-07 PROCESS FOR MANUFACTURING LOW CARBON HIGH CHROMIC FERRITIC STEEL

Publications (1)

Publication Number Publication Date
GB1430375A true GB1430375A (en) 1976-03-31

Family

ID=5855661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4046073A Expired GB1430375A (en) 1972-09-07 1973-08-28 Process for the manufacture of low-carbon ferritic steel with a high chromium content

Country Status (4)

Country Link
DE (1) DE2243839A1 (en)
FR (1) FR2199004B1 (en)
GB (1) GB1430375A (en)
IT (1) IT990984B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501236A1 (en) * 1981-03-03 1982-09-10 Sumitomo Metal Ind PROCESS FOR REFINING STEEL WITH HIGH CHROMIUM CONTENT
WO2006050963A2 (en) * 2004-11-12 2006-05-18 Sms Demag Ag Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
CN110218836A (en) * 2019-05-14 2019-09-10 鞍钢股份有限公司 A kind of ferrosilicon dealuminzation method of purification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187102A (en) * 1978-08-24 1980-02-05 Union Carbide Corporation Method for controlling the temperature of the melt during pneumatic refining of steel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1916945C3 (en) * 1969-04-02 1980-04-17 Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg Use of the jacket gas process for refining pig iron to steel
DE2007373B2 (en) * 1970-02-18 1973-05-03 Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg PROCESS AND CONVERTER FOR MANUFACTURING FERRITIC CHROME STEEL
US3728101A (en) * 1970-11-09 1973-04-17 Armco Steel Corp Process for making stainless steel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501236A1 (en) * 1981-03-03 1982-09-10 Sumitomo Metal Ind PROCESS FOR REFINING STEEL WITH HIGH CHROMIUM CONTENT
WO2006050963A2 (en) * 2004-11-12 2006-05-18 Sms Demag Ag Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
WO2006050963A3 (en) * 2004-11-12 2006-09-28 Sms Demag Ag Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
US7819940B2 (en) 2004-11-12 2010-10-26 Sms Siemag Aktiengesellschaft Production of stainless steel of AISI 4xx grade ferritic steel in an AOD converter
CN101056995B (en) * 2004-11-12 2010-11-10 Sms西马格股份公司 Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
TWI400339B (en) * 2004-11-12 2013-07-01 Sms Siemag Ag Production of rust-free steel offerritic steel group aisi 4xx in an aod converter
CN110218836A (en) * 2019-05-14 2019-09-10 鞍钢股份有限公司 A kind of ferrosilicon dealuminzation method of purification

Also Published As

Publication number Publication date
FR2199004A1 (en) 1974-04-05
FR2199004B1 (en) 1976-10-01
IT990984B (en) 1975-07-10
DE2243839A1 (en) 1974-03-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee