Abstract: Based on the special configuration and use requirement of aero-engine blisk,a new high-performance and low-cost silicone rubber-based fluid abrasive was developed. The processing effect of silicone rubber-based fluid abrasive on the surface of blisk was investigated. The effects of main abrasive parameters (abrasive mesh,abrasive mass ratio,abrasive material) on viscosity and processing performance were analyzed. A single factor experiment was used to analysis the variation of the surface roughness,material removal rate,and surface microstructure of the blisk under different abrasive parameters. The optimal abrasive parameters were obtained. The abrasive contamination detection and verification experiment of the blisk workpiece were carried out. The results show that the new fluid abrasive has good rheological properties,processing performance,and high efficiency. Using 80^# silicon carbide abrasive,and the mass ratio of silicone rubber matrix to abrasive is 1∶1.4,better processing quality can be obtained,and the reduction rate of surface roughness is more than 50 % after 54 cycles. The self-made new fluid abrasive can effectively improve the surface integrity of the blisk parts. It will not pollute the surface of leaves. The accuracy of the leaves will not be destroyed,which can meet the requirements of the blisk.

Key words: blisk, abrasive flow finishing, fluid abrasive, surface integrity, surface roughness