Abstract:TiB2-Co cermet composite powder was fabricated by mechanical alloying process and TiB2-Co coating was sprepared by means of high velocity oxygen fuel method. Based on the methods of orthogonal experimental design, three factors and three levels of orthogonal experiments were carried out to system atically study the effects of three main process parameters, namely propane flow rate, oxygen flow rate, and spraying distance, on the porosity, bonding strength, abrasive wear loss weight of TiB2-Co coatings by HVOF spraying. The analysis results of the R values from the orthogonal experiment demonstrate that the propane flow rate is the primary factor influencing the porosity of the coating, the bonding strength of the coating and the abrasive wear performance of the coating. It has been found that there exists a negative correlation between the porosity of the coating as well as the weight loss resulting from coating wear and the propane flow rate. Meanwhile, a positive correlation is observed between the bonding strength of the coating and the propane flow rate. Additionally, a negative correlation can be identified between the weight loss caused by coating wear and the oxygen flow rate.