航空材料学报2019，Vol.39Issue(3)：62-68,7.
固溶温度对含铪高钨K416B镍基高温合金组织的影响
Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content
摘要
Abstract
By means of microstructure observation on Hf-containing K416B Ni-based superalloy with high W-content after solid solution heat treatment at different temperatures, the effect of solid solution temperature on microstructure of the alloy was investigated. The results show that with the increasing of solid solution temperature, the size of secondary dendrite increases slightly by element diffusion, and the eutectic content decreases gradually to promote the densification of alloy microstructure. In addition, the γ′ phase is dissolved into the matrix, and its size is decreased. During high temperature solid solution heat treatment, the primary strip MC phase in the inter-dendrite is decomposed to form granular M6C carbides, while the morphology and quantity of large sized block M6C phase in eutectic have no obvious change. The solid solution treatment causes that the element W is segregated in the dendrites to diffuse into inter-dendrites, and elements of Hf, Nb, Ti and Cr diffuse into the dendrites, the segregation degree of each element of the alloy is greatly reduced. The results of microstructure research indicate that the optimal solid-solution heat treatment process for the alloy is 1220 ℃ × 4 h.关键词
K416B镍基高温合金/ 固溶温度/ 组织形貌/Key words
K416B Ni-based superalloy/ solution temperature/ microstructure/分类
矿业与冶金引用本文复制引用
侯桂臣,苏海军,谢君,荀淑玲,于金江,孙晓峰,周亦胄..固溶温度对含铪高钨K416B镍基高温合金组织的影响[J].航空材料学报,2019,39(3):62-68,7.基金项目
国家重点基础研究发展计划（973）（2010CB631200，2010CB631206）；国家自然科学基金 （）
