PENINGKATAN KEKERASAN DAN KETAHANAN AUS BAJA KARBON RENDAH DAN BESI COR KELABU MELALUI PROSES VANADISASI
ABSTRACT: The surface hardening
process is one of the high temperature treatment processes wich is applied only
on the surface of the object of the treatment so that it result an object with
superficial hardness without changing the interior matrix shape of the object.
The materials used in this research are Perlitics Gray Cast Iron and Low Carbon
Steel which are easily avaliable in the market) to increase the hardness and
resistance of the surface of the object through vanadisation. As the diffusion
material, vanadium, which was derived from ferro vanadium powder was used. The
experiment was conducted by varying temperatures of 800 oC and 875 oC, with the
resisting periods of 1 hour, 3 hours, and 5 hours. From this experiment, it was
expected that there was anincrease in hardness and resistance of the object
surface without changing its interior matrix shape. After conducting the
experiment and some test namely metallography test, hardness test, and
resistance test, it showed that there was diffusion process on the surface of
the object. Having been compared with the sample before the treatment, it can
be seen that :
- Based on the result of metallography test, there is a change in the
exterior shape of the sample, but a constant interior matrix shape of it.
- Based on the hardness test, there is an increase on hardness, maximally
on the sample caded BCK-5/875 to the rate of 742 HV.
- Bases on the resistance test, there is an increase also in its rate. It
can be seen from the lowest weight loss rate on the sample coded BCK-5/875 to
0,0018 gr.
Penulis: Lukito Dwi Yuono
Kode Jurnal: jptmesindd150451
