TÜDÖKSAD GIFA Özel Eki

life and hardness compared with
high-carbon steel shot. Thanks to
the minimum carbon content (0.10%)
provided by the chemical structure
of our KOTAR products, the fact that
our products emit minimum carbon
both during the usage phase and during
the evaluation process as waste
after use is an indicator of our responsibility
towards the environment
and nature.
While the standard low-carbon steel
shot has a hardness value of 39-41
HRC before use, our KOTAR product
starts the shotblasting operation with
43-44 HRC hardness value and reaches
49-50 HRC hardness value in a
very short time in operation conditions
thanks to its special chemical
content. This makes KOTAR products
more durable,strong and effective.
Another aim of our KOTAR product
was to make the sieve distribution,
which is generally concentrated
on a single sieve size, more homogeneous
in the sieve distribution
specified in the SAE standard. In this
way, we aimed to present a product
distribution similar to the product
mix used in the machine, ready to
use, to the customer. When adding
new products to the machine, the
fact that the product used in the
machine and the newly added product
have a similar sieve structure
ensures that a standard is achieved
on the surfaces obtained. In addition,
the homogeneity of the product
distribution instead of concentrating
on a single sieve size facilitates the
shotblasting of the parts with complex
geometry to the desired extent.
While eliminating the need for second
shotblasting, this homogeneity
of KOTAR distribution meets some
of our customer needs by making
markings and product codes more
visible.
It is known that high-carbon steel
shot break down quickly and disproportionately
due to their brittle
structure, thus can damage machinery
and spare parts. Disproportionate
and angular fragmentation
adversely affects the surfaces inside
the machine, apart from the surface
of the blasted part. Having to
renew the internal parts of the shot
blasting machine and turbine spare
parts more often means extra costs,
and irregular stops may arise.
As KOTAR shot hit the surface
of the part during the blasting process,
they shrink in thin layers like
onions for 80% of their life, keeping
their spherical shape. This feature
makes our KOTAR products more
prominent than other competitors in
the market. The fact that it shrinks
without breaking like a high-carbon
steel shot prolongs the life of the
machine and its spare parts.
KOTAR, proudly presented to
the whole world by Tosçelik Granül,
shows excellent performance in rust,
oxide and sand removal processes,
burr removal and surface preparation
processes with its long service
life and high hardness. Ideal for use
in foundries, steel mills, forging and
rolling mills, machine building, steel
industry, automotive, shipbuilding,
aircraft and structural steel industries.
TURKCAST Special Issue 25