ES406431A1 - Metallurgical process - Google Patents

Metallurgical process

Info

Publication number
ES406431A1
ES406431A1 ES72406431A ES406431A ES406431A1 ES 406431 A1 ES406431 A1 ES 406431A1 ES 72406431 A ES72406431 A ES 72406431A ES 406431 A ES406431 A ES 406431A ES 406431 A1 ES406431 A1 ES 406431A1
Authority
ES
Spain
Prior art keywords
carbon
chromium
oxidation
metallurgical process
oxidise
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
ES72406431A
Other languages
Spanish (es)
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 claimed from SE7207583A external-priority patent/SE386205C/en
Application filed by Uddeholms AB filed Critical Uddeholms AB
Publication of ES406431A1 publication Critical patent/ES406431A1/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

The carbon content in iron, cobalt, or nickel based alloys containing at least about 16 percent chromium is substantially eliminated without significant loss of chromium by blowing the alloy with oxygen to oxidise the carbon and simultaneously introducing steam or ammonia in amounts such that the partial pressure of carbon monoxide (formed by oxidation of carbon) is lower than that which corresponds to the equilibrium pressure for the carbon/chromium oxidation e.g. below 0.95 and preferably below 0.5 atmospheres.
ES72406431A 1971-10-06 1972-09-06 Metallurgical process Expired ES406431A1 (en)

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
ES406431A1 true ES406431A1 (en) 1975-07-16

Family

ID=27255318

Family Applications (1)

Application Number Title Priority Date Filing Date
ES72406431A Expired ES406431A1 (en) 1971-10-06 1972-09-06 Metallurgical process

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
US5182079A (en) * 1990-07-17 1993-01-26 Nelson & Associates Research, Inc. Metallic composition and processes for use of the same
US5055253A (en) * 1990-07-17 1991-10-08 Nelson & Associates Research, Inc. Metallic composition
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
NL296346A (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
BE789083A (en) 1973-01-15
US3867135A (en) 1975-02-18
FI53597C (en) 1978-06-12
DE2243779C2 (en) 1985-06-27
JPS5545610B2 (en) 1980-11-19
IT964235B (en) 1974-01-21
ATA845572A (en) 1977-01-15
AU4739972A (en) 1974-04-11
DE2243779A1 (en) 1973-04-12
GB1396317A (en) 1975-06-04
LU66234A1 (en) 1973-02-01
CA977556A (en) 1975-11-11
FR2158859A5 (en) 1973-06-15
AU477134B2 (en) 1976-10-14
AT338855B (en) 1977-09-26
JPS4845413A (en) 1973-06-29

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