BE791836A - Nitriding steels - by blowing a sintered solid contg nitrogen and manganese into the melt - Google Patents

Nitriding steels - by blowing a sintered solid contg nitrogen and manganese into the melt

Info

Publication number
BE791836A
BE791836A BE791836DA BE791836A BE 791836 A BE791836 A BE 791836A BE 791836D A BE791836D A BE 791836DA BE 791836 A BE791836 A BE 791836A
Authority
BE
Belgium
Prior art keywords
nitrogen
sintered solid
manganese
blowing
melt
Prior art date
Application number
Other languages
French (fr)
Original Assignee
Centre Rech Metallurgique
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.)
Publication date
Publication of BE791836A publication Critical patent/BE791836A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • C21C7/0068—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by introducing material into a current of streaming metal

Landscapes

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

Abstract

Nitriding steels by injecting a sintered solid contg. nitrogen and Mn into bath of molten steel during casting into the ladle. The sintered solid contg. 15-25 (pref. 19-21)% N2, 5-20 (pref. 10-12)% Mn, 10-30 (pref. 18-20)% total C and 40-50% Ca (pref. 27-29% combined and 15.5-17.5% CaO) is crushed and ground to 0-2mm in size and suspended in a gas e.g. compressed air. The process is used esp. vanadium steels.
BE791836D 1972-11-23 Nitriding steels - by blowing a sintered solid contg nitrogen and manganese into the melt BE791836A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE791836 1972-11-23

Publications (1)

Publication Number Publication Date
BE791836A true BE791836A (en) 1973-03-16

Family

ID=3860459

Family Applications (1)

Application Number Title Priority Date Filing Date
BE791836D BE791836A (en) 1972-11-23 Nitriding steels - by blowing a sintered solid contg nitrogen and manganese into the melt

Country Status (1)

Country Link
BE (1) BE791836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0312068A1 (en) * 1987-10-15 1989-04-19 SKW Trostberg Aktiengesellschaft Method of nitriding cast iron

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0312068A1 (en) * 1987-10-15 1989-04-19 SKW Trostberg Aktiengesellschaft Method of nitriding cast iron
US4970051A (en) * 1987-10-15 1990-11-13 Skw Trostberg Aktiengesellschaft Process for the introduction of nitrogen into cast iron

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