Title:
焼結ビトリファイド超仕上げ砥石
Document Type and Number:
Japanese Patent JP6446313
Kind Code:
B2
Abstract:
A sintered vitrified superfinishing grindstone is provided which is a sintered product which is obtained by compression molding of a mixed powder of: a sinterable vitrified binder composed of a powder of a borosilicate glass composition; hard abrasive grains; and soft abrasive grains; and which includes bonded portions formed by necking due to heat compression, between particles of the powder of the borosilicate glass composition which are in contact with each other; and wherein the sinterable vitrified binder contains from 94 to 100% by mass of a powder composed of a low-melting-point borosilicate glass composition containing from 35 to 55% by mole of SiO2; from 3 to 5% by mole of Al2O3; from 10 to 35% by mole of B2O3; and from 25 to 30% by mole of R2O+RO.
Inventors:
Matsumori Noboru
Nabemoto Kinoyuki
Toshio Nakazawa
Nabemoto Kinoyuki
Toshio Nakazawa
Application Number:
JP2015075918A
Publication Date:
December 26, 2018
Filing Date:
April 02, 2015
Export Citation:
Assignee:
Mizuho Co., Ltd.
International Classes:
B24D3/14; B24D3/00; B24D3/02; B24D3/06
Domestic Patent References:
| JP2015506851A | ||||
| JP2001300856A | ||||
| JP253565A | ||||
| JP9267266A | ||||
| JP2002370172A | ||||
| JP2010521323A | ||||
| JP6294262A |
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Bunji Kamada
Yaichiro Nakatani