Deposition Behavior of WC-12Co Particles on Different Substrates Sprayed by HVOF

作者：Sun Ce; Lu Guanxiong; Guo Lei; Lu Yanbing; Ye Fuxing^*

来源：Rare Metal Materials and Engineering, 2016, 45(3): 749-754.

• HVOF
• splat behavior
• deposition behavior
• collision model
• relative deformation ratio

WC-12Co particles were deposited on aluminum, copper and stainless steel substrates by High Velocity Oxy-fuel (HVOF) process. Both the surface and the cross-sectional morphology of the two-phase semi-molten particles were observed by Scanning electron microscopy (SEM). The collision model of the two-phase particles with matrix was simplified as the process interacting with substrate of liquid phase Co and solid phase WC, and an improved mathematical model was established to calculate the relative deformation ratio A of the substrate to the splat. Results show that WC-Co particles deposited on aluminum, copper and stainless steel substrates exhibit hemispherical-like, pie-like and sputtering-like morphologies, respectively, and different shaped WC-Co particles have different 2 values. Compared with forming hemispherical-like (lambda>1) and sputtering-like particles (lambda<1), moderate deformation occurs in both particles and substrates when pie-like (lambda=1) particles are formed, which is beneficial for increasing the effective contact area between particles and the substrate, thus improving the bond strength.

• 出版日期2016-3
• 单位天津大学