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abra abraded surface abrasion rate abrasion stage abrasive paper abrasive particles alloys aluminum oxide annealed annealed 30 approximately artifacts austenitic bands carrier paste cavities cementite Chapter characteristics comparatively contacting points conventional abrasives debris deformed layer depth developed diameter diamond abrasive difﬁcult discussed edge elastically embedded epoxy etch markings ferric ferric chloride ﬁbers ﬁlm ﬁnal polishing ﬁne ﬁner ﬁnish ﬁrst ﬂakes ﬂat fracture grain graphite grits hardness illustrated in Fig indicated inﬂuence ishing light microscopy Machining with Abrasives magnesium oxide Manual Preparation Systems material removal rate mechanism metallographic metals methods micromachining mold mount occur pearlite plastic plastic deformation polishing cloth polishing ﬂuid polishing rate polycrystalline polymer procedure rake angle reagent reﬂecting scratch grooves shear shear-band layer signiﬁcant silicon carbide paper sive sodium thiosulfate specimen material steel strain structure suede sufﬁciently Taper section temperature tion traverses twin bands workpiece Zn brass Ám grade diamond
Page 2 - ... somewhat coarse, and finally the smoothest paper employed in preparing steel plates for engraving. It was, however, found that in many cases no good results could be obtained by polishing directly after using the fine emery-paper, because the surface was so much modified by the scratching. This exterior surface was, therefore, ground off by using fine-grained water-of-Ayr stone and water, until all trace of the scratches was removed. It was then polished on wet cloth stretched flat on a piece...
Page 2 - ... and lastly, the very best and finest washed rouge, so as to obtain a beautiful polish, almost or altogether free from even microscopic scratches, without any of such surface disturbance as is caused by a forced polish. This latter usually looks far better, because the minute cavities and other irregularities are hidden.