论文部分内容阅读
选用合理的机械合金化工艺，可使合金粉中的弥散相Y2O3在机械合金化及随后的热固化过程中分解，井生成更加细小和稳定的复合氧化物Y2Ti2O7，提高合金的蠕变强度.当合金中Ti含量大于2．0％时，合金经800℃，24h时效（650℃长期服役），将有X相析出，导致合金的蠕变强度明显降低.
The reasonable mechanical alloying process can make the dispersed phase Y2O3 of the alloy powder decompose in the process of mechanical alloying and subsequent thermal curing to form a more fine and stable complex oxide Y2Ti2O7 and improve the creep strength of the alloy. When the content of Ti in the alloy is more than 2.0%, the alloy will be X phase precipitated after being aged at 800 ℃ for 24 h (650 ℃), resulting in the obvious decrease of creep strength of the alloy.