摘要
本文用2KW Co_2激光器和同时送给工艺在1Cr18Ni9Ti基体上获得了Co-Cr-Al-Y激光熔覆层。涂层试件的显微组织分析表明,涂层组织主要由γ相,α相和富γ粒子组成。在950℃恒温氧化100小时后,涂层的氧化增重远低于基体试件的氧化增重。抗氧化性的改进是由于富γ质点的钉扎作用。
In this paper, laser cladding Co-Cr-Al-Y alloys coatings on a 1Cr18Ni9Ti substrate were obtained by a 2KW CO_2 Laser with a powder feeder. The microanalysis of the coating specimens indicate that the coatings mainly consist of γ, α phases and yttrium-rich particles. After isothermally oxidized at 950℃ for 100 hs, the weight gain of the coatings is far less than that of the substrate. The improvement in oxidation resistance is believed to be partially due to the formation of the yttrium-rich oxide spikes penetrating the unoxidized specimens.
出处
《航空材料学报》
EI
CAS
CSCD
1992年第1期37-43,共7页
Journal of Aeronautical Materials
