In-Situ Synthesized WC Particles Reinforced Fe-Based Composite Coating by Argon Arc Cladding with Tungsten Powder

Abstract

In-situ synthesized WC particles reinforced Fe-based composite coating was prepared by argon arc cladding on Q235 with mixture of tungsten powders, graphite and iron powders mainly. Microstructures of coating were investigated using SEM, EDS and XRD. Micro-hardness and wear resistance were also studied. The result showed that the main phases of coating were WC, Fe3W3C, martensite and residual austenite. The WC particles were well distributed in matrix and appeared significant growth and reunion from bottom to top of coating. Hardness of the coating ranged between HV0.2 1102.2 to 1863.5. The wear loss of Q235 steel was 37.2 times than that of the coating.

In situ synthesis of WC ceramic particle reinforced composite coating by GTAW

“…There was no obvious heat flux orientation growth on the one side of the interface of combined coating, this was mainly owing to the small size of test plate and the preheating before welding. 6 Furthermore, no crack and pore were visible among the coating, and the boundary between coating and substrate was straight which could be explained that the suitable process parameters were used. Figure 1b shows the typical SEM micrograph of composite coating.…”

“…So in situ synthesised WC reinforced composite coating was paid more and more attention by people. [6][7][8] In this study, the goal is to in situ synthesised WC ceramic particle reinforced composite coatings by GTAW (Gas tungsten arc welding) processing. The microstructure and wear behaviour of the composite coating also will be investigated.…”