Cu Al Ni Mn Ti合金X相

X PHASE IN A Cu Al Ni Mn Ti ALLOY

用金相、电子能谱微区成分分析等方法研究了ＣｕＡｌＮｉＭｎＴｉ 合金中Ｘ相的形成及热处理对Ｘ 相的大小、数量及分布的影响．结果表明：Ｘ相是在铸锭凝固过程中直接从液相中结晶形成的，在均匀化过程中，枝晶逐渐溶解、断开，形成游离的颗粒状Ｘ相；在热处理过程中，逐渐球化形成ＸＬ 相．当热处理温度较高时，ＸＬ 相会部分地溶解，冷却时以脱溶方式形成大量弥散分布的ＸＳ 相；而当热处理温度降低时，ＸＳ 相又重新聚集形成ＸＬ 相．

This paper deals with forming of X phase and the effect of heat treatment on size, amount and distribution of X phase in Cu Al Ni Mn Ti alloy by optical microscope observation and SEM. The results show that the X phase is crystallized directly from the liquid phase in the course of ingot freezing. In the heat treatment process, the X phase becomes spheroid and forms the X L phases. If the temperature of heat treatment is high, X L phase will solute partly and form a large number of disperse X S phases in the course of cooling. If the temperature is low, the X S phase will gather again and form the X L phase.