铸造2012，Vol.61Issue(12)：1388-1392,5.
熔体过热时间对K4169高温合金凝固组织的影响
Effect of Melt Superheating Time on Solidification Microstructure of Superalloy K4169
摘要
Abstract
The melt superheating treatment was conducted on K4169 Ni-based cast superalloy at 1 680 ℃.The influence between loss of element, macroscopic grain size, solidification microstructure, the segregation degree of alloy elements and different melt superheating time at the same melt superheating temperature is explored.The results show that alloy composition of melt superheat treatment is still in the permitted range within 10 min.Cr has been seriously damaged when melt superheating time has been kept for 15 min at 1 680 ℃.Macroscopic grain size is increased, secondary dendrite arm spacing is refined, and the segregation degree of alloy elements is decreased when the melt superheating time increases from 5 min to 10 min.When melt superheating treatment time is prolonged to 15 min, the dendrite arms become coarse and the segregation degree of alloy elements is increased.Macroscopic grain size and secondary dendrite arm spacing refining size can reach M-7, 34.95 μm respectively and the segregation degree of alloy elements is the lightest when melt superheating temperature time has been kept for 10 min.关键词
镍基铸造高温合金/熔体超温处理/熔体过热时间/凝固微观组织Key words
Ni-based cast superalloy/ melt superheating treatment/ melt superheating time/ solidification microstructure分类
矿业与冶金引用本文复制引用
胡德友,张军,黄太文,介子奇,刘林,傅恒志..熔体过热时间对K4169高温合金凝固组织的影响[J].铸造,2012,61(12):1388-1392,5.基金项目
国家自然科学基金重点项目(50931004). （50931004）
