铸造技术2025，Vol.46Issue(4)：354-361,8.DOI:10.16410/j.issn1000-8365.2025.4240
Mg元素对K492M高温合金流动性及疏松缺陷的影响
Effects of Mg on the Fluidity and Microporosity Defects of K492M Superalloy
摘要
Abstract
Superalloy components are constantly evolving toward more complex structures and thin-walled designs,and misrun and microporosity potentially result from the casting process.In response to the above issues,ProCAST simulations and experiments were used to investigate the castability of the Mg microalloyed K492M superalloy,and the influence mechanism of Mg on fluidity and microporosity defects was also revealed.The results show that the addition of Mg can efficiently improve the fluidity of the K492M superalloy and reduce microporosity.The longest fluidity is obtained when the content of Mg is 0.01 wt.％,which is approximately 32.9％greater than that of the master alloy,and the microporosity decreases from 0.033％to 0.005％.The mechanism is that the solidification temperature range and viscosity are reduced in the Mg microalloyed K492M superalloy,which is conducive to improving the melt fluidity.Moreover,the size of the carbides and remaining liquid phase quantity increase,and the viscosity decreases,which is beneficial for reducing the microporosity.关键词
K492M/Mg微合金化/流动性/疏松缺陷Key words
K492M superalloy/microalloying of Mg/fluidity/microporosity分类
金属材料引用本文复制引用
周煜晗,杨文超,张丽辉,谢君,张彦超,邢伟杰,付文磊,樊晓光..Mg元素对K492M高温合金流动性及疏松缺陷的影响[J].铸造技术,2025,46(4):354-361,8.基金项目
中国航空发动机集团有限公司自主创新专项基金(ZZCX-2022-040) （ZZCX-2022-040）
凝固技术国家重点实验室开放课题(SKLSP202323) （SKLSP202323）
