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Materials 2017, 10(9), 1047; doi:10.3390/ma10091047

Effect of Mo on Microstructures and Wear Properties of In Situ Synthesized Ti(C,N)/Ni-Based Composite Coatings by Laser Cladding

1
,
1
,
1
and
1,2,*
1
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
2
State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Received: 8 August 2017 / Revised: 2 September 2017 / Accepted: 4 September 2017 / Published: 6 September 2017
(This article belongs to the Section Manufacturing Processes and Systems)
View Full-Text   |   Download PDF [8354 KB, uploaded 7 September 2017]   |  

Abstract

Using Ni60 alloy, C, TiN and Mo mixed powders as the precursor materials, in situ synthesized Ti(C,N) particles reinforcing Ni-based composite coatings are produced on Ti6Al4V alloys by laser cladding. Phase constituents, microstructures and wear properties of the composite coatings with 0 wt % Mo, 4 wt % Mo and 8 wt % Mo additions are studied comparatively. Results indicate that Ti(C,N) is formed by the in situ metallurgical reaction, the (Ti,Mo)(C,N) rim phase surrounding the Ti(C,N) ceramic particle is synthesized with the addition of Mo, and the increase of Mo content is beneficial to improve the wear properties of the cladding coatings. Because of the effect of Mo, the grains are remarkably refined and a unique core-rim structure that is uniformly dispersed in the matrix appears; meanwhile, the composite coatings with Mo addition exhibit high hardness and excellent wear resistance due to the comprehensive action of dispersion strengthening, fine grain strengthening and solid solution strengthening. View Full-Text
Keywords: laser cladding; in situ synthesis; composite coating; titanium alloy; wear resistance laser cladding; in situ synthesis; composite coating; titanium alloy; wear resistance
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MDPI and ACS Style

Wu, F.; Chen, T.; Wang, H.; Liu, D. Effect of Mo on Microstructures and Wear Properties of In Situ Synthesized Ti(C,N)/Ni-Based Composite Coatings by Laser Cladding. Materials 2017, 10, 1047.

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