Ni-25Al-15Cr多相金属间化合物的显微组织
来源期刊：中国有色金属学报1999年第3期
论文作者：陈荣石 郭建亭 周继扬
文章页码：499 - 503
关键词：NiAl合金；金属间化合物；显微组织；热处理
Key words：nickel-aluminium alloys; intermetallic compounds; microstructure; heat treatment
摘 要：研究了Ni-25Al-15Cr(摩尔分数，%)多相金属间化合物合金的显微组织及热处理对其组织的影响。结果表明：1200℃24h均匀化后的冷却速度不仅影响β相中α-Cr析出物的尺寸，且影响β相的成分及体积分数；空冷后时效，β相分解成γ’相和有序度更高的β相，炉冷后时效，β相保持稳定；并对时效过程中β相稳定性与时效前冷却速度之间的关系进行了讨论。
Abstract: The effects of heat treatment on the microstructure of a multiphase Ni-25%Al-15%Cr(mole fraction) intermetallic alloy have been investigated. It is shown that cooling rates following homogenization affect not only the size of α-Cr inβ phase but also the composition and volume fraction of β phase. Theβphase may either decompose into γ' and more strongly ordered βphase or remain stable during aging, depending on the cooling rates preceding aging. The relationships between stability of β phase and cooling rates preceding aging has also been discussed.
