摘要
借助光学显微镜、扫描电子显微镜、EDS以及热压缩试验机,研究不同均匀化工艺下铸态GH4698镍基高温合金的变形抗力及其机理。结果表明,均匀化程度、晶粒尺寸、偏析程度以及再结晶程度对合金变形抗力具有一定的影响。综合考虑合金的开坯再结晶率、节能、降低变形抗力等需求,结合各项影响因素,最后确定采用保存少量枝晶组织的1 100℃保温15 h均匀化处理工艺。
The deformation resistance and mechanism of as cast GH4698 nickel base superalloy were studied by OM, SEM, EDS and hot compression testing machine. The results show that the degree of homogenization, the grain size, the degree of segregation and the degree of recrystallization has a certain influence on the deformation resistance alloy. Considering the requirements of the recrystallization rate, energy saving and reducing the deformation resistance of the alloy, combined with the influencing factors, the 1 100℃ and 15 h homogenization process is determined.
出处
《铸造技术》
北大核心
2017年第11期2629-2632,共4页
Foundry Technology
关键词
镍基高温合金
变形抗力
再结晶
均匀化处理
nickel base superalloy
deformation resistance
recrystallization
homogenization treatment
