Abstract: In order to meet the wheel requirement of high porosity and high strength for the high efficiency grinding process of difficult-to-cut materials, a new type of porous composite-bonded cubic boron nitride (CBN) abrasive wheel is developed based on alumina bubble particles as pore-forming agent. The grinding experiments are conducted on nickel-based alloy respectively with the developed porous CBN wheel and white corundum grinding wheel. The grinding forces, radial wear and wheel wear forms are measured and investigated. Results show that, the grinding forces and grinding temperatures of porous CBN wheel are smaller than that of white corundum grinding wheel, and the grinding ratio is about 6 times higher when the material remove rate is 4 mm3/(mm•s). The primary wear forms of porous composite-boned CBN wheel include abrasive abrasion wear, abrasive and bond fracture, and adhesion wear. Accompanied by the wear, new abrasives and pores are exposed. Serious wheel adhesion and loading phenomena are found during grinding with white corundum grinding wheel, and the radial wear of the corundum grinding wheel is almost 6 times that of porous one.

Key words: alumina bubbles;composite-bonded;porous cbn wheel;grinding force;wheel wear