摘要
以C,Ti,Nb和Ni60A粉为原料,利用氩弧熔覆技术在16Mn钢表面原位合成(Ti,Nb)C增强Ni基复合涂层.应用扫描电境、透射电镜、X射线衍射仪、显微硬度计对复合涂层的组织结构、(Ti,Nb)C颗粒的生长方式和性能进行了分析.结果表明,熔覆层与基体呈冶金结合,涂层无裂纹、无气孔等缺陷.熔覆层组织由(Ti,Nb)C,Cr23C6和γ-Ni组成,原位合成(Ti,Nb)C的生长基元为八面体,连接生长为八面体顶角连接和棱边连接,长大形态为花瓣状和团絮状.
Ni-based composite coating reinforced by( Ti,Nb) C was prepared on the 16 Mn steel substrate by means of argon arc cladding technique with the pre-alloyed powder of Ni60 A,Nb,Ti and C alloy powders. The growth morphology of the( Ti,Nb) C particles and the microstructure as well as properties of coating were investigated by SEM,TEM,X-Ray,transmission electron microscope and microhardness tester. The results showed that the interface between the coating and substrate had excellent bonding and was free of pores and cracks. The microstructure of cladded coating consisted of( Ti,Nb) C particles,γ-Ni and eutectic structure M23C6. The in-situ synthesized( Ti,Nb) C presented octahedral shape. The connection growth was in the forms of octahedron verte-linked connection and edge-shared connection with form of petal-like shape and flocculation-like shape.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2015年第10期77-80,117,共4页
Transactions of The China Welding Institution
基金
黑龙江省教育厅骨干教师资助项目(1253G051)
关键词
氩弧熔覆
复合涂层
原位自生
长大特性
argon arc cladding
composite coating
insitu synthesis
growth characteristic
