GB1300344A - Method of decarburizing steels - Google Patents

Method of decarburizing steels

Info

Publication number
GB1300344A
GB1300344A GB23629/71A GB2362971A GB1300344A GB 1300344 A GB1300344 A GB 1300344A GB 23629/71 A GB23629/71 A GB 23629/71A GB 2362971 A GB2362971 A GB 2362971A GB 1300344 A GB1300344 A GB 1300344A
Authority
GB
United Kingdom
Prior art keywords
flow rate
conversion efficiency
oxidant
steel
decarburization
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
GB23629/71A
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.)
Sunbeam Oster Co Inc
Original Assignee
Allegheny Ludlum Industries Inc
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 Allegheny Ludlum Industries Inc filed Critical Allegheny Ludlum Industries Inc
Publication of GB1300344A publication Critical patent/GB1300344A/en
Expired 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
    • C21C7/10—Handling in a vacuum
    • 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)

Abstract

1300344 Purifying steel ALLEGHENY LUDLUM INDUSTRIES Inc 19 April 1971 [2 March 1970] 23629/71 Heading C7D In the dynamically balanced decarburization of molten steel, the vessel containing the steel is flushed with a diluent gas (e.g. Ar), gaseous oxidant is introduced into the vessel to initiate decarburization, the flow rate of the input gases and the composition of the effluent gases are measured to determine the rate of carbon removal and the oxidizer conversion efficiency for that flow rate, the oxidant flow rate is then increased in predetermined amounts with alternate calculation of oxidizer conversion efficiency until the flow rate is maximized for a conversion efficiency above a predetermined value. The diluent gas flow rate may then be decreased in predetermined amounts with gas conversion efficiency calculations so long as the efficiency remains above the required minimum. The oxidant may be introduced by introduced by top blowing or beneath the surface of the melt. Reference is made to the treatment of Cr-containing steels with less slagging of Cr.
GB23629/71A 1970-03-02 1971-04-19 Method of decarburizing steels Expired GB1300344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1591470A 1970-03-02 1970-03-02

Publications (1)

Publication Number Publication Date
GB1300344A true GB1300344A (en) 1972-12-20

Family

ID=21774309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23629/71A Expired GB1300344A (en) 1970-03-02 1971-04-19 Method of decarburizing steels

Country Status (8)

Country Link
US (1) US3666439A (en)
AT (1) AT323775B (en)
BE (1) BE763595A (en)
CA (1) CA923710A (en)
DE (1) DE2109676A1 (en)
ES (1) ES388791A1 (en)
FR (1) FR2081633B1 (en)
GB (1) GB1300344A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850617A (en) * 1970-04-14 1974-11-26 J Umowski Refining of stainless steel
LU63512A1 (en) * 1970-07-24 1971-11-16
DE2114600B2 (en) * 1971-03-25 1981-05-07 Vacmetal Gesellschaft für Vakuum-Metallurgie mbH, 4600 Dortmund Process for targeted vacuum decarburization of high-alloy steels
JPS5392319A (en) * 1977-01-25 1978-08-14 Nisshin Steel Co Ltd Method of making ultralowwcarbon stainless steel
JPS5442324A (en) * 1977-09-10 1979-04-04 Nisshin Steel Co Ltd Control procedure of steel making process using mass spectrometer
JPS5442323A (en) * 1977-09-10 1979-04-04 Nisshin Steel Co Ltd Control procedure of steel making process using mass spectormeter
JP2850407B2 (en) * 1989-04-18 1999-01-27 大同特殊鋼株式会社 Refining method of chromium-containing molten steel
SE9800153D0 (en) * 1998-01-21 1998-01-21 Hoeganaes Ab Low pressure process
US6923843B1 (en) 2001-11-13 2005-08-02 Nupro Corporation Method for oxygen injection in metallurgical process requiring variable oxygen feed rate
CN112680566B (en) * 2020-12-18 2022-10-21 北京首钢自动化信息技术有限公司 Refining furnace decarburization end point detection method and system

Also Published As

Publication number Publication date
FR2081633B1 (en) 1974-09-27
BE763595A (en) 1971-08-02
FR2081633A1 (en) 1971-12-10
US3666439A (en) 1972-05-30
AT323775B (en) 1975-07-25
ES388791A1 (en) 1973-05-16
DE2109676A1 (en) 1971-09-16
CA923710A (en) 1973-04-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees