Microstructure and properties of Inconel 625 coatings deposited by the Cold Metal Transfer technique on a 16Mo3 boiler tube were investigated. The clad layers were shown to have a typical cellular-dendritic structure with secondary phases in the interdendritic regions (e.g. Laves phases and complex nitrides/carbides (MX)). Nanohardness of the interdendritic regions was higher than of the ɣ matrix dendritic regions. Energy dispersive X-ray spectroscopy analysis revealed microsegregation of Ni, Cr, Fe to the dendritic regions, as well as interdendritic segregation of Nb and Mo. Based on the phase identifications performed, a new solidification path is proposed.

研究了通过冷金属转移技术在16Mo3锅炉管上沉积的Inconel 625涂层的组织和性能。所示的包覆层具有典型的蜂窝状树枝状结构，在树枝状间区域具有次生相（例如，拉夫斯相和复杂的氮化物/碳化物（MX））。树突间区域的纳米硬度高于ɣ基质树突区域的纳米硬度。X射线能谱分析表明，Ni，Cr，Fe在树枝状区域发生微偏析，在Nb和Mo的树枝状偏析的基础上，提出了一条新的凝固途径。