Oxide film thickness and composite mechanical properties of an ultrasonic-assisted ELID cast-iron-bonded grinding wheel

ELID Dressing Behaviors of Non-Abrasive Iron-Based Grinding Wheels

“…The surface roughness was measured to be Ra0.5 nm, and no apparent scratches were detected. This reaffirms the potential and effectiveness of non-abrasive iron-based grinding diamond wheels in achieving high-precision results in material processing; (5) The mechanical properties of the oxide layer on the iron-based grinding diamond wheel without abrasive particles were determined using a nanoindentation instrument, yielding a hardness (H) of 800 MPa, an elastic modulus (E) of 23 GPa, and a stiffness of 0.3 mN/nm; (6) In subsequent applications, it is possible to adjust the current and voltage during electrolysis to control the thickness of the oxide film formed on the grinding wheel's surface. Furthermore, by tweaking the wheel formulation and grinding parameters, it is feasible to modify the content of α-Fe 2 O 3 particles within the oxide film.…”

“…As early as the 1980s, cast-iron-bonded grinding diamond wheels with micro-scaled powders were innovatively fabricated by T. Nakagawa [1][2][3]. However, due to their small pores, which were easily blocked and caused passivation, these fine-grain, cast-ironbonded grinding diamond wheels proved difficult to popularize and apply in common grinding processes of that era [4][5][6][7]. To address the issue of abrasive passivation, significant progress has been made in achieving nano-level surface quality by applying the ELID grinding method to sharpen the abrasives (H.Ohmori).…”