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In this paper,three kinds of cermet particles with different binder phase and content,namely WC-12Co,WC-17Co and Cr3C2-25NiCr were deposited on the Q235 low carbon steel and WC-12Co coating substrates to investigate the effect of binder phase content and substrate hardness on deposition behavior of cermet particle during cold spraying.The morphology of the deposited particles was examined by scanning electron microscopy(SEM)from the particle surface and cross-sections.It was found that with increasing substrate hardness,the deposition behavior of cermet particles transformed from completely embedding into substrate to partially flattening and even rebounding.Varying the Co content from 12 wt%to 17 wt% influenced significantly the deposition deformation behavior of the WC-Co particles,the higher Co content brought about a fuller flattening of WC-Co particles.However,Cr3C2-25NiCr particle exhibited the relatively lower flattening ratio and significant rebounding of Cr3C2 even with the highest binder phase content,which may be attributed to the bigger Cr3C2 size and weak bonding between Cr3C2 and NiCr.
In this paper, three kinds of cermet particles with different binder phase and content, namely WC-12Co, WC-17Co and Cr3C2-25NiCr were deposited on the Q235 low carbon steel and WC-12Co coating substrates to investigate the effect of binder phase content and substrate hardness on deposition behavior of cermet particle during cold spraying. The morphology of the deposited particles was examined by scanning electron microscopy (SEM) from the particle surface and cross-sections. It was found that with increasing substrate hardness, the deposition behavior of cermet particles transformed from completely embedding into substrate to partially flattening and even rebounding. Varying the Co content from 12 wt% to 17 wt% influenced significantly the deposition deformation behavior of the WC-Co particles, the higher Co content brought about a fuller flattening of WC-Co particles. However, Cr3C2-25NiCr particle exhibited the relatively lower flattening ratio and significant rebounding of Cr3C2 even with the hi ghest binder phase content, which may be attributed to the larger Cr3C2 size and weak bonding between Cr3C2 and NiCr.