The Effects of Austenitizing Conditions on the Microstructure and Wear Resistance of a Centrifugally Cast High-Speed Steel Roll

Minwoo Kang, Young-Kook Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The influences of austenitizing conditions on the microstructure and wear resistance of a centrifugally cast high-speed steel roll were investigated through thermodynamic calculation, microstructural analysis, and high-temperature wear tests. When the austenitizing temperature was between 1323 K and 1423 K (1050 °C and 1150 °C), coarse eutectic M 2 C plates were decomposed into a mixture of MC and M 6 C particles. However, at 1473 K (1200 °C), the M 2 C plates were first replaced by both new austenite grains and MC particles without M 6 C particles, and then remaining M 2 C particles were dissolved during the growth of MC particles. The wear resistance of the HSS roll was improved with increasing austenitizing temperature up to 1473 K (1200 °C) because the coarse eutectic M 2 C plates, which are vulnerable to crack propagation, changed to disconnected hard M 6 C and MC particles.

Original languageEnglish
Pages (from-to)3365-3374
Number of pages10
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume47
Issue number7
DOIs
Publication statusPublished - 2016 Jul 1

Fingerprint

Steel
wear resistance
Wear resistance
casts
high speed
steels
Eutectics
microstructure
Microstructure
eutectics
Austenite
Temperature
Crack propagation
Wear of materials
Thermodynamics
wear tests
crack propagation
austenite
thermodynamics
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

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abstract = "The influences of austenitizing conditions on the microstructure and wear resistance of a centrifugally cast high-speed steel roll were investigated through thermodynamic calculation, microstructural analysis, and high-temperature wear tests. When the austenitizing temperature was between 1323 K and 1423 K (1050 °C and 1150 °C), coarse eutectic M 2 C plates were decomposed into a mixture of MC and M 6 C particles. However, at 1473 K (1200 °C), the M 2 C plates were first replaced by both new austenite grains and MC particles without M 6 C particles, and then remaining M 2 C particles were dissolved during the growth of MC particles. The wear resistance of the HSS roll was improved with increasing austenitizing temperature up to 1473 K (1200 °C) because the coarse eutectic M 2 C plates, which are vulnerable to crack propagation, changed to disconnected hard M 6 C and MC particles.",
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N2 - The influences of austenitizing conditions on the microstructure and wear resistance of a centrifugally cast high-speed steel roll were investigated through thermodynamic calculation, microstructural analysis, and high-temperature wear tests. When the austenitizing temperature was between 1323 K and 1423 K (1050 °C and 1150 °C), coarse eutectic M 2 C plates were decomposed into a mixture of MC and M 6 C particles. However, at 1473 K (1200 °C), the M 2 C plates were first replaced by both new austenite grains and MC particles without M 6 C particles, and then remaining M 2 C particles were dissolved during the growth of MC particles. The wear resistance of the HSS roll was improved with increasing austenitizing temperature up to 1473 K (1200 °C) because the coarse eutectic M 2 C plates, which are vulnerable to crack propagation, changed to disconnected hard M 6 C and MC particles.

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