Study On The Use Of Cemented Carbide In-Situ TiCp Composite For Oil-Sand Separation Cyclone

As an important tool in the separation of oil sands,the wear and tear of the cyclone liner is a serious constraint to the extraction of oil sands.High-chromium cast iron is a relatively common wear-resistant material,but there are still many shortcomings in the application of cyclone liners,and it is urgent to improve their wear resistance.In this paper,in situ Ti Cp/high chromium cast iron composites were prepared using a combination of self-spreading high temperature synthesis（SHS）and vacuum disappearing mould casting with the addition of YG8 cemented carbide particles and YT15 cemented carbide particles,and microstructure observation,field emission electron microscopy,physical composition analysis,Vickers hardness testing and dry sand rubber wheel wear test inspection methods were used to investigate the effect of cemented carbide particles The effect of cemented carbide particles on the structure and properties of Ti Cp/high chromium cast iron composites was investigated using microstructure observation,field emission electron microscopy,physical phase composition analysis,Vickers hardness test and dry sand rubber wheel wear test.The results of optical microscopy showed that the matrix and the interface penetrated each other and the composites showed good metallurgical bonding;the results of field emission electron microscopy showed that the YG8 and YT15 cemented carbide particles showed good metallurgical bonding with the high chromium cast iron matrix respectively,and the in situ Ti C particles showed ellipsoidal shape when the addition of cemented carbide particles was 10 wt.%and the reaction rate was suitable,at which time the Ti C XRD physical analysis and microstructure observation shows that the coating composition is mainly composed of cemented carbide,Ti C and M₇C₃ carbide,martensite and austenite matrix,the addition of cemented carbide increases the M₇C₃ carbide and martensite and reduces austenite.YG8 cemented carbide-Ti Cp/high chromium cast iron matrix composites with 10 wt.%YG8 particles have the best hardness and wear resistance.The microhardness of YG8cemented carbide-Ti Cp/high chromium cast iron matrix composites is 2.40 times higher than that of high chromium cast iron matrix phase,up to 1348 HV_0.1,and the depth of micro indentation is 35.15%lower than that of Cr26 high chromium cast iron.The wear resistance of YG8 cemented carbide-Ti Cp/high chromium cast iron matrix composites under 45 N,90N and 130 N load is 2.63,3.30 and 3.26 times higher than that of high chromium cast iron.When the addition amount of YT15 in the YT15 cemented carbide-Ti Cp/high chromium cast iron matrix composite was 10 wt.%,the hardness and wear resistance were the best.The microhardness was 2.67 times that of the matrix phase of high chromium cast iron,and the maximum was 1509 HV_0.1.The micro-indentation depth was reduced by 54.00%compared with that of Cr26 high chromium cast iron.The wear resistance under the load of 45 N,90N and 130 N was 3.09,3.70 and 3.57 times that of high chromium cast iron,respectively.This shows that cemented carbide particles and Ti C reinforcement can support and protect the material,so that it can effectively reduce the damage of wear to its own material in the process of wear.