| 摘要 |
PURPOSE:To improve the oxidation resistance of an alloy steel buried in refractories so as to prevent collapse by using iron contg. specified amts. of Cr and Al as the alloy steel. CONSTITUTION:This metal product for reinforcing refractories is made of an alloy steel consisting of 10-27% Cr, 1-7% Al and the balance Fe. In the alloy steel, >=10% Cr improves the oxidation resistance but >27% Cr extremely deteriorates the cold workability, so it is necessary to regulate the Cr content to 10-27%. The oxidation resistance is remarkably improved by adding Al. 1% Al begins to produce the effect, >=2% Al is usually and >7% Al is not economical, but also increases the amt. of alumina formed and accelerates the wear of a roll during rolling, so it is necessary to regulate the Al content to a range of 1-7%.
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