セラミックス研削における延性・ぜい性遷移挙動

概要

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Ductile mode grinding can be applied to ceramics if the grain depth of cut is decreased. Therefore, single grain grinding was carried out in order to clarify the ductile-brittle transition point in ceramics grinding. The authors attempted to quantitatively evaluate the ductile-brittle transition behavior of ceramics by defining the pile-up coefficient on the pile-up phenomenon. The results are follows. (1) While the actual grinding depth and chipping size increased with increasing normal grinding force, the trend was different depending on the characteristics of the particular ceramics. (2) The pile-up coefficient C decreased with the increasing of maximum grain depth of cut gm. (3) The ductile mode grinding was carried out when the C value is more than one. (4) The boundary between the absence and presence of cracking in grinding was at C=1. (5) If the maximum grain depth of cut g_m at C=1 is defined as the critical grain depth of cut g_c. the g_c value decreased with the increasing of Hv value of ceramics.
一関工業高等専門学校の論文
2005-12-20