固溶及时效热处理对K465合金组织的影响  

Effect of Solid Solution Heat Treatment and Aging on Microstructure of K465 Alloy

作　　者：任维鹏[1] 李相辉[1] 关心光 黄强[1] 李青[1] 宋尽霞[1] REN Weipeng LI Xianghui GUAN Xinguang HUANG Qiang LI Qing SONG Jinxia(Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China)

机构地区：[1]北京航空材料研究院先进高温结构材料重点实验室,北京100095

出　　处：《材料开发与应用》2016年第6期38-42,共5页Development and Application of Materials

基　　金：863计划项目(2012AA03A513)

摘　　要：研究了K465合金热处理后的显微组织和力学性能。结果表明,合金热处理后,枝晶干处的γ'相呈立方状、体积分数为62%,同时还析出了细小点状碳化物,铸态MC碳化物转变为M6C。高温时效热处理结果表明,合金经1 000℃/500 h和1 100℃/100 h后,析出富集W和Mo的针状和棒状二次析出相;1 000℃条件下,随着时间的延长,二次析出相的数量逐渐增多;温度的升高可促进二次相的析出。The microstructure and mechanical properties of K465 as cast alloy,after solid solution heat treatment and ageing at high temperature,had been investigated. Results revealed that the volume fraction of cube-shaped γ＇ phase in the dendrite core was 62% for K465 after solid solution heat treatment,fine MC-type carbide was precipitated in the dendrite core,and there presented M6 C carbide transformed from MC carbide. The needle and stick-like secondary phases riched in W and Mo precipitatd after the alloy ageing at 1 000 ℃ for 500 h and 1 100 ℃ for 100 h. The amount of secondary precipitates increased over the ageing time at 1 000 ℃; the elevated temperature promoted the growth of secondary precipitates.

关 键 词：K465合金 热处理 显微组织 力学性能 

分 类 号：TG132.32[一般工业技术—材料科学与工程]