摘要
介绍一种新型1100℃用涡轮导向叶片合金。该合金不含元素Ti而含有1.5wt%的H f,并且A l+Ta+Cr含量高于19wt%,具有良好的抗氧化性能,同时持久强度达到国外一代定向合金水平,铸造性能突出。IC10合金的碳化物主要为TaC和H fC,并且由于次生MC(2)的生成,抑制了产生M6C相。采用1180℃,2h的预处理消除低熔点N i5H f相,提高了合金的初熔温度。测得了IC10合金700℃,980℃的低循环疲劳寿命曲线以及600℃1100℃的热/机械疲劳寿命曲线。利用IC10合金研制的某发动机高压涡轮导向叶片正在进行地面试车考核。
A new alloy named as IC10 for aero-engine vane with a service temperature of 1100℃ is introduced in this paper.The(alloy′s) composition is characterized by no Ti,1.5wt% Hf and higher than 19wt% of Al+Ta+Cr.This alloy exhibits superior oxidation resistance and excellent castability.Furthermore,its stress-rupture strength is at the same level with abroad first-generation DS superalloy.The carbides of IC10 alloy is mainly composed of TaC and HfC.Moreover,the formation of M_6C is suppressed by the secondary MC_...
出处
《航空材料学报》
EI
CAS
CSCD
2006年第3期20-24,共5页
Journal of Aeronautical Materials
关键词
高温合金
氧化
持久
疲劳
铸造性能
superalloy
oxidation
stress rupture
fatigue
castability
