抄録
A strong holding force of abrasive-grains in a grinding stone is of great importance to accomplish efficient ceramic-grinding. Laser dressing is a novel method that achieves the selective removal of a matrix material with a minimal damage on abrasive-grains by selecting a certain wavelength of laser. For a porous cast-iron matrix diamond grinding stone, laser irradiation can simultaneously enhance diamond-holding strength by the chemical reaction between diamond and cast-iron matrix. In this study, it has been confirmed that carbide, Fe3C, forms after laser irradiation at the interface between cast-iron and diamond by Auger electron spectroscopy analysis. This carbide forms dimples on diamond surfaces and holds diamond grains with an anchor effect. As a consequence, through ceramic grinding, a laser dressed diamond grinding stone can retain higher number of diamonds with higher abrasive-grain protrusion heights due to an enhanced grain-holding strength than a grinding stone dressed by a conventional mechanical method.
