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研究了2种合金化的Ti－Al合金Ti-48Al—2Cr—2Nb和Ti-47Al-1Cr—1V—2．5Nb（合金含量均为原子分数）在800和900℃的恒温氧化行为，分析探讨了它们的高温氧化特征及合金元素对其高温氧化性能的影响．研究发现：800℃时，二合金化Ti－Al合金的抗氧化性能要比二元Ti—48Al（以下简称为48Al）合金的差；900℃时，其抗氧化性能得到了很大改善，氧化反应速率远低于二元48Al合金；2种温度下，Ti－48Al—2Cr—2Nb合金的抗氧化性能始终优于Ti－47Al-1Cr—1V—2．5Nb合金；合金元素的加入是通过改变合金基体的显微组织及氧化层的结构来影响其高温氧化性能的．
The oxidation behavior of two kinds of alloying Ti-48Al-2Cr-2Nb and Ti-47Al-1Cr-1V-2.5Nb alloy with atomic fraction at 800 and 900 ℃ was investigated. Their high temperature oxidation characteristics and alloying elements on the high temperature oxidation properties. The results show that the oxidation resistance of binary alloy Ti-Al alloy is lower than that of binary Ti-48Al alloy (hereinafter referred to as 48Al alloy) at 800 ℃. The oxidation resistance of Ti-Al alloy at 900 ℃ is greatly improved. The reaction rate is much lower than that of binary 48Al alloy. The oxidation resistance of Ti-48Al-2Cr-2Nb alloy is always better than that of Ti-47Al-1Cr-1V-2.5Nb alloy at 2 temperatures. The microstructure of the alloy matrix and the structure of the oxide layer to affect its high temperature oxidation properties.