Fe-Cr-Al 合金の高温耐酸化性におよぼす C, Ti 量の影響

概要

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The oxidation behavior of Fe-18Cr-3Al alloys containing 0.015∿0.12% carbon and 0∿1.0% titanium has been investigated in air at 1000℃ and 1200℃. At 1200℃ carbon and titanium contents have remarkable effects on the oxidation resistance of Fe-Cr-Al alloys, but little effect at 1000℃. Weight gain increases and the formation of unusual oxide scales is accelerated, with increasing carbon content. Though it increases weight gain, the addition of titanium has a tendancy to prevent exfoliation of scales by formation of titanium oxide in scales, and consequently suppresses unusual oxidation. Stable oxidation is achieved by continuous formation of α-Al_2O_3, a small amount of TiO_2, and Al-Ti oxide. An appearance of iron oxides causes unusual oxidation. The excellent oxidation resistance of Fe-18Cr-3Al alloy is obtained with a carbon content less than 0.03% and titanium content of 0.2 to 0.4%.
社団法人日本鉄鋼協会の論文
1976-01-01