摘要
研究了铌对燃气轮机用镍基合金组织和性能的影响。结果表明 ,铌能提高镍基合金的强度和硬度 ,同时也能提高镍基合金的塑性和韧性 ,但铌含量 >2 %时 ,强度增加缓慢 ,塑性和韧性急剧下降。铌主要是通过时效析出强化相γ′,细化γ相晶粒和使晶界析出链状分布的M2 3C6
The effect of niobium on microstructure and properties of Ni-base alloy used for gas turbines was studied.The results show that addition of Nb can enhance strength and hardness,ductility and toughness of the alloy,but when the content of Nb is over 2%,its strength increases slowly,and its ductility and toughness decrease sharply.The properties improvement with addition of Nb is achieved mainly through the strengthening γ′-phase,grain refinement and M_(23)C_6 as chain structure along the grain boundary.
出处
《金属热处理》
CAS
CSCD
北大核心
2004年第3期32-34,共3页
Heat Treatment of Metals
关键词
铌
镍基合金
γ'相
时效强化
Niobium
Ni-base alloy
γ′ phase
age-hardening
