摘要
在Q235钢表面用等离子弧熔覆Ni-Cr-B-Si-Fe铁基合金涂层及添加不同含量Al2O3+TiO2铁基合金复合涂层,比较研究了这两种涂层的组织、显微硬度和磨损性能。结果表明,添加Al2O3+TiO2后的铁基复合涂层界面的生长形态发生变化,由初生的细长柱状树枝晶转变为小的枝晶,并且提供了形核的核心,细化了晶粒;其组织主要由晶粒细小的γ-Fe为基,以Cr23C6,Fe3C,Al2O3+TiO2为增强相的复合涂层;熔覆层的显微硬度可达600～655HV0.2。
Plasma cladding Ni-Cr-B-Si-Fe-based alloy coating and Fe-based alloy composite coating with Al2O3+TiO2 were obtained on the Q235 substrate, and microstructure, microhardness and wear resistance of the two coatings were investigated contrastively. The results show that the interface solidification form of Fe-based alloy composite coating with Al2O3+TiO2 have changed. They become small dendrite from primary lathy dendrite, and offer core for solidification. The microstructure is mainly based on γ-Fe with fine particles, and its microhardness can reach 600-655 HV0.2.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第12期33-36,共4页
Transactions of The China Welding Institution
基金
河南省基础与前沿技术研究072300440020
