Development of a New Type of Metal Matrix for Porous Metal Bonded Diamond Grinding Wheels

Abstract

In this paper, a new type of aluminum bronze was used to substitute for the traditional tin bronze as the bonding matrix of the porous diamond wheel. Effects of hot pressing sintering temperature, the amount of Al and Fe on the mechanical properties of aluminum bronze based bond were studied by means of orthogonal test. A new kind of pore inducer with spherical shape was chosen. Effects of pore inducer size and processing parameters on the pore morphology and the mechanical properties of the porous metal bonds and diamond composites were studied. Experimental results revealed that theTRSof the new type porous aluminum bronze based bond and diamond composites increased by 119% and 258% respectively compared to the traditional porous tin bronze based bond and diamond composites. Also, stronger bonding between the metal bond and diamond grits was observed.