STABILITY OF COMPLEX NITRIDES IN HEAT RESISTANT STEELS

被引:0
|
作者
Vodarek, Vlastimil [1 ]
Holesinsky, Jan [1 ]
机构
[1] VSB Tech Univ Ostrava, Ostrava, Czech Republic
关键词
heat-resistant steels; precipitation; nitrides; TEM; PRECIPITATION; EVOLUTION;
D O I
暂无
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The effect of two levels of niobium (0.1 and 0.3wt.% Nb) in AISI 316LN austenitic steels and intentional additions of nickel (0.5 and 1.15wt% Ni) to 12CrMoVNbN martensitic steels on precipitation reactions was studied. Minor phase evolution at temperatures 475-650 degrees C was studied on creep ruptured specimens with times to rupture extending up to 220,000 hours. Thermodynamic and dimensional stability of nitrogen rich Z-phase and M6X (Cr3Ni2SiX type) precipitates in dependence on chemical composition of steels and the temperature of exposure was investigated.
引用
收藏
页码:490 / 496
页数:7
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