摘要
研究了常用奥氏体耐热不锈钢S30908、S31008和S30815的热塑性、抗氧化性和固溶处理后的组织性能。结果表明,含少量稀土的S30815的高温热塑性较S30908和S31008好。800℃氧化时,按抗氧化能力增强的次序为:S30908、S31008和S30815;900℃氧化时,S31008和S30908的氧化速率相当,高于S30815的氧化速率。三个钢种的氧化产物均为氧化铬和少量的M3O4型氧化物,添加少量的稀土铈可以大大提高奥氏体耐热不锈钢的抗氧化性。氮含量和稀土元素Ce的添加使S30815的强度远高于S31008和S30908。
The hot ductibility and oxidation resistance of S30908, S31008 and S30815, as well as their microstructure and mechanical properties after solution treatment were studied. The results show that the hot ductibility of S30815 is superior to those of S30908 and S31008. At 800℃, S30815 has the highest oxidation resistance and S30908 has the lowest. The oxidation rates of S30908 and S31008 are similar at 900℃ , both lower than that of S30815. The oxide scale of these three steels is composed of chromium oxide and a little M3O4 oxide. The addition of rare earth Ce significantly improves the oxidation resistance of heat-resistant austenitic stainless steels. In addition, nitrogen and rare earth Ce help improve the strength of S30815 to a much higher level than those of S31008 and S30908.
出处
《宝钢技术》
CAS
2013年第5期26-31,共6页
Baosteel Technology
关键词
奥氏体
耐热不锈钢
热塑性
抗氧化性能
austenite
heat-resistant stainless steel
hot ductibility
oxidation resistance
