物理学报2012，Vol.61Issue(19)：355-361,7.
氮气喷射成形FGH4095的组织特征
Microstructure of spray-formed superalloy FGH4095
摘要
Abstract
Spray-forming technology can produce billets with similar microstructure and higher productivity compared with the P/M pro- cess. The nickel based superalloy FGH4095 billet was produced by spray-forming with nitrogen as atomization gas. The pressure of the atomization gas and the temperature of the deposit zone were recorded. The compactness of the deposit was characterized by quantitative metallography and Archimedes method. The grain structure of γ substrate and the size and morphology of γ′ phase were observed. Results show that the density of the deposit produced by nitrogen spray forming reaches about 99% and little amount of pores with diameters about 1--2 μm could be detected in the deposit matrix. While, pores could be enclosed by HIP and near iso-thermal forging process; Nitrogen was existed as carbonitride with diameters less than 1 μm. The average grain size of the equiaxed grains in the interior of the deposit is about 20-40 μm, while the grains near the surface of the deposit are finer with average grain size about 13μm; the primary γ′ phase which has diameters about 0.3-0.5 μm possesses irregular block feature. The microstructure of the spray deposit is related to the temperature history of the alloy during the spray forming process.关键词
喷射成形/FGH4095/显微组织Key words
spray-forming/FGH4095/microstructure分类
矿业与冶金引用本文复制引用
张宇,葛昌纯,沈卫平,邱成杰..氮气喷射成形FGH4095的组织特征[J].物理学报,2012,61(19):355-361,7.基金项目
国家高技术研究发展计划（批准号：2007AA032502）和国家自然科学基金（批准号：50974016）资助的课题.感谢德国不来梅大学的Udo Fritsching教授和Volker Uhlenwinkel博士所给予的支持和帮助. （）
