Publication detail

Oxygen blowing to the re-melts of the high-alloy steels for castings - Hadfield steel and Cr13Ni1 steels

STRÁNSKÝ, K. LEVÍČEK, P. ŠENBERGER, J. BAŽAN, J. KAVIČKA, F.

Czech title

Vhánění kyslíku při přetavbách vysoce legovaných litých slitin - Hadfieldových ocelí a ocelí Cr13Ni1

English title

Oxygen blowing to the re-melts of the high-alloy steels for castings - Hadfield steel and Cr13Ni1 steels

Type

journal article - other

Language

en

Original abstract

High-alloy steel scrap is very often processed by melting in basic electric-arc furnaces via simple re-melt technologies. This technology gradually leads to continued increase in the content of hydrogen and nitrogen in melts and after a certain number of re-melts, hydrogen and nitrogen bubbles begin to form. Especially high-alloy chrome steels for water turbines and high-alloy manganese (Hadfield) steels have a tendency to form such bubbles. The increase in the content of both gases in the re-melting can be significantly reduced by engaging a short but intensive carbon boiling by oxygen blowing. This paper puts forward verified thermodynamic and kinetic conditions of the oxygen blowing into the baths of the re-melts of two different high-alloy steels: chromium steel 13wt% Cr and 1wt% Ni used for the castings of water-turbine parts and pumps and manganese (Hadfield) 13 wt% Mn and 1,3 wt%C steel for castings designed to resist wear connected with high pressures and impacts.

Czech abstract

Ocelový odpad vysoce legovaných slitin je často zpracováván tavbou v elektrických pecích jednoduchými tavícími technologiemi. To postupně vede ke zvyšování obsahu vodíku a dusíku v tavenině a poté začnou vznikat bubliny a póry. Zvláště vysoce legované chromové oceli určené k výrobě vodních turbín a také vysoce legované oceli manganem (Hadfieldovi oceli) mají tendenci tvořit tyto bubliny a staženiny. Zvyšující obsah obou plynů při přetavbách může mírně redukovat krátké, ale intenzívní spalování uhlíku vháněním kyslíku. Tento článek popisuje ověřené termodynamické a kinetické podmínky při vhánění kyslíku v sázkách dvou odlišných slitin – chromové oceli Cr13Ni1 a dále Hadfieldovi oceli.

English abstract

High-alloy steel scrap is very often processed by melting in basic electric-arc furnaces via simple re-melt technologies. This technology gradually leads to continued increase in the content of hydrogen and nitrogen in melts and after a certain number of re-melts, hydrogen and nitrogen bubbles begin to form. Especially high-alloy chrome steels for water turbines and high-alloy manganese (Hadfield) steels have a tendency to form such bubbles. The increase in the content of both gases in the re-melting can be significantly reduced by engaging a short but intensive carbon boiling by oxygen blowing. This paper puts forward verified thermodynamic and kinetic conditions of the oxygen blowing into the baths of the re-melts of two different high-alloy steels: chromium steel 13wt% Cr and 1wt% Ni used for the castings of water-turbine parts and pumps and manganese (Hadfield) 13 wt% Mn and 1,3 wt%C steel for castings designed to resist wear connected with high pressures and impacts.

Keywords in English

Hadfield, chromium steel, oxygen

Released

01.10.2005

Publisher

Stowarzyszenie Techniczne Odlewników Polskich

Location

ul. Zakopiańska 73 30-418 Krakow Polsko

ISSN

0033-2275

Journal

Przeglad Odlewnictwa

Volume

2005

Number

10

Pages from–to

636–642

Pages count

7

BIBTEX


@article{BUT46421,
  author="Karel {Stránský} and Petr {Levíček} and Jaroslav {Šenberger} and Jiří {Bažan} and František {Kavička},
  title="Oxygen blowing to the re-melts of the high-alloy steels for castings – Hadfield steel and Cr13Ni1 steels",
  journal="Przeglad Odlewnictwa",
  year="2005",
  volume="2005",
  number="10",
  month="October",
  pages="636--642",
  publisher="Stowarzyszenie Techniczne Odlewników Polskich",
  address="ul. Zakopiańska 73
30-418 Krakow
Polsko",
  issn="0033-2275"
}