초록

This invention relates to iron-base alloy compositions, nickel containing austenitic ferrous alloy compositions (especially low nickel compositions) and dopants added to low nickel austenitic alloys as a means of improving the elevated temperature oxidation resistance of the resultant material.

대표청구항 ▼

A crystalline iron-base alloy composition exhibiting improved resistance to oxidation, comprising: (i) iron; (ii) chromium; (iii) silicon; (iv) magnesium at a level of about 0.1 to about 1.5 percent, by weight of the final composition; (v) calcium at a level of about 0.1 to about 1.5 percent, by wei

A crystalline iron-base alloy composition exhibiting improved resistance to oxidation, comprising: (i) iron; (ii) chromium; (iii) silicon; (iv) magnesium at a level of about 0.1 to about 1.5 percent, by weight of the final composition; (v) calcium at a level of about 0.1 to about 1.5 percent, by weight of the final composition; and (vi) an amount of a dopant element sufficient to show a significant and reproducible improvement in one or more oxidation resistant properties of the final composition selected from the group consisting of sodium, lithium, potassium and mixtures thereof.