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08449 Scales Formation on Si-Containing Steels

Picture for 08449 Scales Formation on Si-Containing Steels
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Product Number: 51300-08449-SG
ISBN: 08449 2008 CP
Author: Cheng-Hsien Yang, Wen-Ta Tsai, Sze-Ning Lin, and Chih-Hsiung Chen
Publication Date: 2008
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The effect of Si content (in the range of 0.01 to 1.91 wt.%) on scale formation on electric steels in air at the temperature ranging from 850 to 1200 oC 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 strain rates. The experimental results showed that at temperature below 1100 oC the oxidation rate decreased with increasing Si content in the steel. The formation of an inner scale, mainly consisting of 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 oC. Under straining conditions and at 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.
The effect of Si content (in the range of 0.01 to 1.91 wt.%) on scale formation on electric steels in air at the temperature ranging from 850 to 1200 oC 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 strain rates. The experimental results showed that at temperature below 1100 oC the oxidation rate decreased with increasing Si content in the steel. The formation of an inner scale, mainly consisting of 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 oC. Under straining conditions and at 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.
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