| 摘要 |
PROBLEM TO BE SOLVED: To provide a process for fabricating a high tensile strength steel article. SOLUTION: The steel article (20) is manufactured by preparing an iron-based alloy comprising about <0.5 wt.% aluminum, melting the alloy to obtain a melt, adding calcium and subsequently aluminum to the melt to increase an aluminum content of the melt to about >0.5 wt.% and casting the melt to form a casting. Other calcium additions may be performed simultaneously with the addition of aluminum, and after the addition of aluminum but before the casting of the melt. The addition of calcium deoxidizes the melt to minimize formation of clustered aluminum-oxygen-based inclusions. COPYRIGHT: (C)2004,JPO
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