| 摘要 |
The present invention provides a casting product which has an alumina barrier layer having further improved stability, and can exhibit superior oxidation resistance, carburization resistance, nitridation resistance, corrosion resistance and the like when used under high-temperature atmospheres. The casting product according to the present invention is one having an alumina barrier layer which is formed on the surface of a base and contains an aluminum oxide, wherein the aluminum oxide is represented by the formula: (Al(1-x)M(x))2O3 wherein M represents at least one element selected from Cr, Ni, Si and Fe and 0 < x < 0.5. The casting product according to the present invention is also one having an alumina barrier layer which is formed on the surface of a base and contains an aluminum oxide, wherein the aluminum oxide contains at least one element selected from Cr, Ni, Si and Fe which is dissolved in the form of a solid solution, and wherein the content ratio, in at.%, of at least one element selected from Cr, Ni, Si and Fe which is dissolved together with Al in the form of a solid solution satisfies the formula: Al/(Cr+Ni+Si+Fe) ≥ 2.0. |
