GB1396317A - Process for decarbu''sing chromium containing alloys - Google Patents

Process for decarbu''sing chromium containing alloys

Info

Publication number
GB1396317A
GB1396317A GB916272*[A GB916272A GB1396317A GB 1396317 A GB1396317 A GB 1396317A GB 916272 A GB916272 A GB 916272A GB 1396317 A GB1396317 A GB 1396317A
Authority
GB
United Kingdom
Prior art keywords
alloys
chromium
steam
oxygen
carbon
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
GB916272*[A
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.)
Uddeholms AB
Original Assignee
Uddeholms AB
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
Priority to BE789083D priority Critical patent/BE789083A/en
Priority to GB916272*[A priority patent/GB1396317A/en
Application filed by Uddeholms AB filed Critical Uddeholms AB
Priority claimed from SE7207583A external-priority patent/SE386205C/en
Priority to SE7207583A priority patent/SE386205C/en
Priority to FI2128/72A priority patent/FI53597C/en
Priority to NO278272A priority patent/NO132156C/no
Priority to IT28475/72A priority patent/IT964235B/en
Priority to ES72406431A priority patent/ES406431A1/en
Priority to DE2243779A priority patent/DE2243779C2/en
Priority to AT845572A priority patent/AT338855B/en
Priority to JP9972072A priority patent/JPS5545610B2/ja
Priority to FR7235109A priority patent/FR2158859A5/fr
Priority to LU66234A priority patent/LU66234A1/xx
Priority to AU47399/72A priority patent/AU477134B2/en
Priority to CA153,345A priority patent/CA977556A/en
Priority to US295355A priority patent/US3867135A/en
Priority to US05/550,554 priority patent/US4021233A/en
Publication of GB1396317A publication Critical patent/GB1396317A/en
Priority to US05/792,790 priority patent/US4188206A/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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • 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)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

1396317 Decarburizing alloys UDDEHOLMS AB 5 Oct 1972 [6 Oct 1971 28 Feb 1972] 46507/71 and 9162/72 Heading C7D A method of decarburizing alloys containing at least 10 wt per cent of chromium together with a major proportion of iron, cobalt and/or nickel, comprises introducing oxygen to form carbon monoxide with the carbon, and simultaneously or subsequently introducing sufficient steam and/or ammonia to lower the carbon monoxide partial pressure below the equilibrium pressure for oxidation of carbon or chromium while keeping the volume ratio of oxygen to steam/ammonia below 3:1. The alloys refined may be stainless steels or nickel- or cobaltbased alloys. The temperature of the decarburization should be 1550-1800‹C, which may be achieved by oxidation of any silicon present in the melt; any chromium which is oxidized collects in a slag and may be recovered with ferrosilicon reductant. The refining is performed in a converter provided with coaxial inlet tubes, the inner tubes admitting oxygen, and nitrogen/argon as scavengers after the decarburization, while steam is passed through the outer tubes.
GB916272*[A 1971-10-06 1972-02-28 Process for decarbu''sing chromium containing alloys Expired GB1396317A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
BE789083D BE789083A (en) 1971-10-06 PROCESS FOR REDUCING THE CARBON CONTENT IN METALLURGIC PRODUCTS
GB916272*[A GB1396317A (en) 1971-10-06 1972-02-28 Process for decarbu''sing chromium containing alloys
SE7207583A SE386205C (en) 1971-10-06 1972-06-09 SETTING TO REDUCE THE CARBON CONTENT IN CHROME-CONTAINED METAL MELTS
FI2128/72A FI53597C (en) 1971-10-06 1972-07-28 SAETT ATT NEDBRINGA KOLHALTEN TILL LAOGA VAERDEN I METALLSMAELTOR INNEHAOLLANDE KROM
NO278272A NO132156C (en) 1971-10-06 1972-08-04
IT28475/72A IT964235B (en) 1971-10-06 1972-08-24 METALLURGICAL PROCEDURE
ES72406431A ES406431A1 (en) 1971-10-06 1972-09-06 Metallurgical process
DE2243779A DE2243779C2 (en) 1971-10-06 1972-09-06 Process for oxygen-hydrogen refining in the manufacture of stainless steels with a high chromium content or cobalt or nickel alloys
AT845572A AT338855B (en) 1971-10-06 1972-10-02 PROCESS FOR REDUCING THE CARBON CONTENT OF ALLOYS WITH AT LEAST 10% BY WEIGHT CHROME AND AT LEAST ONE OF THE METALS IRON, COBALT, NICKEL AS THE MAIN COMPONENT
JP9972072A JPS5545610B2 (en) 1971-10-06 1972-10-04
AU47399/72A AU477134B2 (en) 1971-10-06 1972-10-04 A method of reducing the carbon content of metallic melts containing chromium
FR7235109A FR2158859A5 (en) 1971-10-06 1972-10-04
LU66234A LU66234A1 (en) 1971-10-06 1972-10-04
CA153,345A CA977556A (en) 1971-10-06 1972-10-05 Method of reducing a carbon content of iron, cobalt or nickel based melts containing at least 10% chromium
US295355A US3867135A (en) 1971-10-06 1972-10-05 Metallurgical process
US05/550,554 US4021233A (en) 1971-10-06 1975-02-18 Metallurgical process
US05/792,790 US4188206A (en) 1971-10-06 1977-05-02 Metallurgical process

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB4650771 1971-10-06
GB916272*[A GB1396317A (en) 1971-10-06 1972-02-28 Process for decarbu''sing chromium containing alloys
SE7207583A SE386205C (en) 1971-10-06 1972-06-09 SETTING TO REDUCE THE CARBON CONTENT IN CHROME-CONTAINED METAL MELTS

Publications (1)

Publication Number Publication Date
GB1396317A true GB1396317A (en) 1975-06-04

Family

ID=27255318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB916272*[A Expired GB1396317A (en) 1971-10-06 1972-02-28 Process for decarbu''sing chromium containing alloys

Country Status (13)

Country Link
US (1) US3867135A (en)
JP (1) JPS5545610B2 (en)
AT (1) AT338855B (en)
AU (1) AU477134B2 (en)
BE (1) BE789083A (en)
CA (1) CA977556A (en)
DE (1) DE2243779C2 (en)
ES (1) ES406431A1 (en)
FI (1) FI53597C (en)
FR (1) FR2158859A5 (en)
GB (1) GB1396317A (en)
IT (1) IT964235B (en)
LU (1) LU66234A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188206A (en) * 1971-10-06 1980-02-12 Uddeholms Aktiebolag Metallurgical process
FR2340375A2 (en) * 1976-02-04 1977-09-02 Creusot Loire PROCESS FOR THE PREPARATION OF CHROME STEELS
US4187474A (en) * 1977-08-11 1980-02-05 Xerox Corporation Metal vapor laser discharge tube
US4260415A (en) * 1979-12-12 1981-04-07 Allegheny Ludlum Steel Corporation Decarburizing molten metal
US4451288A (en) * 1982-06-29 1984-05-29 Union Carbide Corporation Method for producing low hydrogen content in steels produced by subsurface pneumatic refining
US5055253A (en) * 1990-07-17 1991-10-08 Nelson & Associates Research, Inc. Metallic composition
US5182079A (en) * 1990-07-17 1993-01-26 Nelson & Associates Research, Inc. Metallic composition and processes for use of the same
US5505798A (en) * 1994-06-22 1996-04-09 Jerry L. Nelson Method of producing a tool or die steel
US6146033A (en) * 1998-06-03 2000-11-14 Printronix, Inc. High strength metal alloys with high magnetic saturation induction and method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2079901A (en) * 1934-07-05 1937-05-11 Burtner Fleeger Metallurgical addition agent and process
US2855293A (en) * 1955-03-21 1958-10-07 Air Liquide Method and apparatus for treating molten metal with oxygen
US2864689A (en) * 1956-07-24 1958-12-16 Electro Chimie Metal Process of successively desulphurizing and desiliconizing a bath of pig iron
US3076703A (en) * 1958-04-28 1963-02-05 Arbed Manufacture of steel
BE610265A (en) * 1960-11-18
BE635868A (en) * 1962-08-07
GB1182959A (en) * 1967-12-08 1970-03-04 Steel Co Of Wales Ltd Improvements in and relating to the Refining of Iron.
GB1253581A (en) * 1968-02-24 1971-11-17 Maximilianshuette Eisenwerk Improvements in processes and apparatus for making steel

Also Published As

Publication number Publication date
FI53597B (en) 1978-02-28
JPS4845413A (en) 1973-06-29
JPS5545610B2 (en) 1980-11-19
LU66234A1 (en) 1973-02-01
FI53597C (en) 1978-06-12
DE2243779A1 (en) 1973-04-12
IT964235B (en) 1974-01-21
AU477134B2 (en) 1976-10-14
US3867135A (en) 1975-02-18
ATA845572A (en) 1977-01-15
AT338855B (en) 1977-09-26
FR2158859A5 (en) 1973-06-15
CA977556A (en) 1975-11-11
DE2243779C2 (en) 1985-06-27
BE789083A (en) 1973-01-15
AU4739972A (en) 1974-04-11
ES406431A1 (en) 1975-07-16

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
SPA Amended specification published
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years