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Diamond cutting tools have been widely used in
natural stone industry as the circular sawing, frame sawing,
wire sawing and core drilling. The diamond cutting tools are
manufactured by powder metallurgy techniques. They are
consisted of diamond particles embedded in metal matrix.
Chemical interaction between diamonds and matrix is primary
importance for diamond cutting tools. As the most used binder
to provide these reaction is iron and its alloys. The aim of this
study is to enhance the cutting performance of diamond tools by
the investigation the effects of iron addition on to the matrix
compositions. In this study; 30,50 and 80 wt% Fe containing
matrices were determined and their mechanical properties,
microstructures and wear resistances were examined
comparatively. All materials in the form of powders were cold
pressed and then the pellets were sintered with Spark Plasma
Sintering (SPS). Microstructural and mechanical
characterizations were performed by SEM-EDS, XRD,
hardness, compression tests and wear tests. According to the
results, control on the grain size and reaching the theoretical
density values were achieved by SPS method due the lower
sintering temperature and shorter sintering time. Results
showed that Fe additives had no negative effect on properties of
the samples. Moreover, the mechanical properties of the
samples increased with increasing Fe contents.
International Iron & Steel Symposium
UDCS
Berrak Bulut
Murat Baydogan
Eyup Sabri Kayali