Next Article in Journal
Microstructure, Residual Stress, Corrosion and Wear Resistance of Vacuum Annealed TiCN/TiN/Ti Films Deposited on AZ31
Previous Article in Journal
The Effect of Iron Content on Glass Forming Ability and Thermal Stability of Co–Fe–Ni–Ta–Nb–B–Si Bulk Metallic Glass
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle
Metals 2017, 7(1), 8; doi:10.3390/met7010008

The Morphologies of Different Types of Fe2SiO4–FeO in Si-Containing Steel

The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 4 November 2016 / Revised: 14 December 2016 / Accepted: 26 December 2016 / Published: 29 December 2016
View Full-Text   |   Download PDF [2841 KB, uploaded 29 December 2016]   |  

Abstract

Red scale defect is known to be mainly caused by net-like Fe2SiO4–FeO. In the present study, the morphology of Fe2SiO4–FeO in a Si-containing steel was investigated by simultaneous thermal analysis, high-temperature laser scanning confocal microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Only liquid Fe2SiO4–FeO can form a net-like morphology. Liquid Fe2SiO4–FeO is classified into two types in this work. Type-1 liquid Fe2SiO4–FeO is formed by melting pre-existing solid Fe2SiO4–FeO that already exists before the melting point of Fe2SiO4–FeO. Type-2 liquid Fe2SiO4–FeO is formed at a temperature higher than the melting point of Fe2SiO4–FeO. The results show that type-1 liquid Fe2SiO4–FeO is more likely to form a net-like morphology than is type-2 liquid Fe2SiO4–FeO. The penetration depth of type-1 liquid Fe2SiO4–FeO is also larger at the same oxidation degree. Therefore, type-1 liquid Fe2SiO4–FeO should be avoided in order to eliminate red scale defect. Net-like Fe2SiO4–FeO may be alleviated by two methods: decreasing the oxygen concentration in the heating furnace before the melting point of Fe2SiO4–FeO is reached and increasing the reheating rate before the melting point. In addition, FeO is distributed with a punctiform or lamellar morphology on Fe2SiO4. View Full-Text
Keywords: Fe2SiO4–FeO; morphology; Si-containing steel; mechanism Fe2SiO4–FeO; morphology; Si-containing steel; mechanism
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Zhou, M.; Xu, G.; Hu, H.; Yuan, Q.; Tian, J. The Morphologies of Different Types of Fe2SiO4–FeO in Si-Containing Steel. Metals 2017, 7, 8.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top