本文研究了Nb在γ′相沉淀强化型Ni-Cr-Al-Ti系高温合金中的作用。结果指出:适量的Nb不但能提高该合金的室温和高温强度,而且还能提高室温和高温塑性,Nb主要通过强化γ′相而使合金强度提高,通过细化晶粒而使台金塑性改善。
The effect of Nb content on the y'-phase precipitation-hardened Ni-Cr-Al-Ti base superaUoy has been investigated. Results show that a moderate addition of Nb could improve both strength and ductility of the superaUoy at room and high temperatures. It was ascertained that such improvement on the strength and ductility is made principally after the strengthening Y'-phase and the grain refinement respectively.
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