Physical and chemical performances of high Al steels①
来源期刊：中南大学学报(英文版)2005年第4期
论文作者：王海川 董元篪 张文明 王世俊 周云
文章页码：385 - 388
Key words：high Al steel; physical performance; chemical performance; microstructure
Abstract: The effects of acid-soluble Al content on the physical and chemical performances of high Al steels were investigated. The results show that the distribution of acid-soluble Al in steel substrate is uniform. With increasing Al content, the strength and toughness of steels decrease a little but the hardness increases. The average yield strength and tensile strength are 425 MPa and 570 MPa, respectively, and the Rockwell hardness is 89.7. For non- Al steels the average oxidation rate is up to 0.421 mg/(cm2·h) at 1 373 K. For high Al steels, when the mass fraction of Al is less than 5%, there is a thinner gray oxidized layer on surface and the oxidation rate is high; when the mass fraction of Al is more than 8.0%, the thin, close and yellow glossing film still exists, and the average oxidation rate is only 0.016 mg/(cm2·h).
