吴贇,聂义宏,赵帅,白亚冠,朱怀沈,姜萍

• 1:中国一重能源装备材料科学研究所
• 2:天津重型装备工程研究有限公司

摘要(Abstract)：

利用扫描电镜分析、模拟热处理等方法,研究了700℃超超临界电站汽轮机转子用改型617合金双真空冶炼(VIM+ESR)后的铸态组织特征和均匀化热处理后的微观组织变化。结果表明,铸态组织存在明显的偏析,主要偏析元素为Mo和Ti,偏聚于枝晶间;枝晶间和晶界上分布有块状和连续的碳化物;均匀化热处理后枝晶明显消除,块状碳化物部分溶解,晶界连续碳化物充分溶解;该合金成分均匀化主要受Mo原子扩散控制。提出改型617合金均匀化热处理工艺应为1180~1200℃保温24 h以上。

关键词(KeyWords)： 617高温合金;偏析;均匀化;700℃超超临界

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 吴贇,聂义宏,赵帅,白亚冠,朱怀沈,姜萍

DOI: 10.13289/j.issn.1009-6264.2015.07.025

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