Pengaruh Kuat Arus Dan Campuran Gas Argon – Co2 Pada Pengelasan Gmaw Terhadap Kekuatan Tarik Dan Impact Pada Baja Karbon Medium Fasa Ganda
Abstract: The function
of shielding gas is the
most importance in
gas metal arch
welding, because it protected
the oxidation from
out side. Argon
and CO2 are the
shielding gas that often
used, choosing the CO2
on mixing shielding
gas for some
reasons that is
readystock, cheap and good
penetration.The aim of
this research are
to know the
influence of welding current and mixing shielding gas
Argon – CO2 against tensile strength and impact strength on weld of
medium carbon steel dual phase. The method of this research as follow AISI 1045
steel forged on temprature
900°C - 950°C then dual
phase on 770°C
holding tome 90
minutes as dependent variables.
The Welding currents are 80A, 100A and
120A , mixing shielding gas, Argon – CO2:
( 0 – 100%), (100% - 0) and (50% - 50%). Both are as independent variables. Tensile strength
and impact strength
are as fixed
variables.From this research,
It can be concluded
that welding current
and shielding gas
have the influenced
toward heat input
and caused the weld metal fusion or unfusion. This situation influenced
toward tensile strength and impact
strength.It was prooved
that on 80A
for the 3rd shielding gas
had defect (incomplete fusion and porosity) so the
tensile strength and impact strength was very low. On 120A, ArCO2 mixing
shielding gas had the highest tensile and impact strength because no defect in
it, good fusion.
Keywords: Dual phase steel,
welding current, mixing shielding gas Ar – CO2, GMAW, tensile strength,
impact strength
Penulis: Eko Hendry Suyono,
Yudy Surya Irawan, Anindito Purnowidodo
Kode Jurnal: jptmesindd110177
