航空材料学报2018，Vol.38Issue(3)：52-57,6.DOI:10.11868/j.issn.1005-5053.2017.000205
定向凝固工艺对DZ466高温合金显微组织的影响
Effect of Parameters of HRS Process on Microstructure of DZ466 Ni-based Superalloy
摘要
Abstract
The influences of withdrawal rate and mold heater zone temperature during high rate solidification (HRS) on the microstructures were investigated. As the results, the primary dendritic spacing, the size of γ′ phase particles and carbides are decreased with the increase of the withdrawal rate or mold heater zone temperature. As the withdrawing goes on, the primary dendritic spacing and the size of γ′ phase particles are increased, and the heat emission efficiency of HRS process is decreased. The results show that fine dendrite and γ′ phase can be achieved with the withdrawal of 8 mm/min and mold heater zone temperature of 1520 ℃/1530 ℃, which is benefit to improve the properties of DZ466 alloy.关键词
DZ466/高温合金/抽拉速率/显微组织Key words
DZ466/superalloy/withdrawal rate/microstructure分类
矿业与冶金引用本文复制引用
姜华,暴云飞,李青,杨振宇,陈晶阳..定向凝固工艺对DZ466高温合金显微组织的影响[J].航空材料学报,2018,38(3):52-57,6.基金项目
国家重点研发计划资助项目(2016YFB0701402) （2016YFB0701402）
航空科学基金资助项目(2015ZE21006) （2015ZE21006）
