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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.18 [2011] >
IJEMS Vol.18(2) [April 2011] >
| Title: | Tool life performances, wear mechanisms and surface roughness characteristics when turning austenised and quenched AISI 52100 bearing steel with ceramics and CBN/TiC cutting tools |
| Authors: | Motorcu, Ali Riza |
| Keywords: | Ceramic cutting tool
CBN/TiC cutting tool
Hardened bearing steel
Tool life
Tool wear
Surface roughness |
| Issue Date: | Apr-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Tool life performances and wear
mechanisms of various cutting tools such as mixed alumina ceramic (KY1615),
coated ceramic (KY4400) and cubic boron nitride (CBN/TiC) are investigated
experimentally under different cutting conditions in turning austenised and
quenched AISI 52100 steels. Worn surfaces of the cutting tools are examined by
scanning electron microscope (SEM) to find out the effective mechanism of wear.
The surface roughness values are
measured with surface profilometer and which cutting tool will provide a lower
surface roughness values are investigated in the machining of hardened bearing
steel AISI 52100. The experimental results showed that tool life
decreased with increasing speed for all cutting tools. The longer tool life is
obtained for the CBN/TiC cutting tool when machining the hardened AISI 52100
steel. However, the difference among the tool lives decreased considerably with
decreasing the cutting speed. In addition, it is observed that the major wear
form of the tools is the smooth flank wear for the CBN/TiC tool. However,
crater and flank wear are observed for the KY1615 cutting tool while tool nose
deformation is observed for the KY4400 cutting tool when machining the hardened
steels. CBN/TiC and KY615 tool produced better surface roughness values of Ra than the KY4400 tools in
all experimental conditions. On
the surface roughness, low and medium cutting speed does not show a significant
effect for all tools. But, Ra
surface roughness values decreased with the highest cutting speed value. On the
other hand; surface roughness value of Ra
improved in the lowest depth of cut for all tools. |
| Page(s): | 137-146 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.18(2) [April 2011]
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