Oxidation of Metals

, Volume 72, Issue 3–4, pp 145–157 | Cite as

Effects of Temperature and Straining on the Oxidation Behavior of Electrical Steels

  • Cheng-Hsien Yang
  • Szu-Ning Lin
  • Chih-Hsiung Chen
  • Wen-Ta Tsai
Original Paper

Abstract

The effect of Si content (in the range of 0.01–1.91 wt%) on scale formation of electrical steels in dry air at temperatures ranging from 850 to 1200 °C was investigated. The effect of applied tensile strain on oxidation behavior was also explored. A thermo-mechanical simulator (Gleeble machine) was employed to conduct the oxidation tests at different load conditions. The experimental results showed that at 1000 °C the oxidation rate decreased with increasing Si content in the steel. The formation of an inner scale, mainly consisting of amorphous silica, was responsible for the improved oxidation resistance. However, a substantial increase in oxidation rate due to the formation of molten eutectic fayalite (Fe2SiO4) was observed when the temperature was raised to 1200 °C. Under straining conditions at a very short oxidation time, the inner scale structure was slightly modified though the scale thickness remained almost unchanged for the steel containing 1.91 wt% Si.

Keywords

Si-containing steel Thermo-mechanical simulator Oxidation Silica Fayalite 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Cheng-Hsien Yang
    • 1
  • Szu-Ning Lin
    • 2
  • Chih-Hsiung Chen
    • 2
  • Wen-Ta Tsai
    • 1
  1. 1.Department of Materials Science and EngineeringNational Cheng Kung UniversityTainanTaiwan
  2. 2.New Materials Research and Development DepartmentChina Steel CorporationKaohsiungTaiwan

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