Control of graphite formation in solidification of white cast iron

V. Sergio, S. Ishikawa, K. Yamamoto, Hirofumi Miyahara, K. Ogi, K. Kamimiyada

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Graphite formation should be strictly suppressed for the most abrasion resistant white cast irons, since austenite (γ) +graphite eutectic structure shows lower hardness and selectively wears thus deteriorates the abrasion resistance even though the austenite transform to hard phase such as martensite. On the other hand, a small amount of fine graphite is desired to distribute in rolls for hot steel mills to suppress the scoring. However, strong carbide formers such as Cr, V, Nb have been increasingly added to rolls, in order to crystallise more harder carbides. As γ+carbide eutectic grows, the residual liquid among eutectic cells becomes poor in carbide formers and rich in elements which promote graphite formation. Therefore an appropriate alloy design is essential for the hot steel milling rolls. In this study, the graphite formation mechanisms are discussed for chromium cast iron, high speed steel type cast iron and Ni hard type cast iron.

Original languageEnglish
Pages (from-to)27-30
Number of pages4
JournalInternational Journal of Cast Metals Research
Volume21
Issue number1-4
DOIs
Publication statusPublished - Aug 1 2008

Fingerprint

Graphite
Cast iron
Solidification
Carbides
Eutectics
Steel
Austenite
Iron and steel plants
Chromium
Abrasion
Martensite
Wear resistance
Hardness
Wear of materials
Liquids

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Control of graphite formation in solidification of white cast iron. / Sergio, V.; Ishikawa, S.; Yamamoto, K.; Miyahara, Hirofumi; Ogi, K.; Kamimiyada, K.

In: International Journal of Cast Metals Research, Vol. 21, No. 1-4, 01.08.2008, p. 27-30.

Research output: Contribution to journalArticle

Sergio, V. ; Ishikawa, S. ; Yamamoto, K. ; Miyahara, Hirofumi ; Ogi, K. ; Kamimiyada, K. / Control of graphite formation in solidification of white cast iron. In: International Journal of Cast Metals Research. 2008 ; Vol. 21, No. 1-4. pp. 27-30.
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