PROSES PEMBUATAN SERBUK LOGAM DENGAN METODA ATOMISASI LAS OKSI-ASITILEN
ABSTRACT: Atomization is the
most common method for producing powders
from metal. There are three atomization methods in powder fabrication :
water atomization, gas atomization, and centrifugal atomization. Atomization
was being developed to increase powder
quality and process productivity. A new atomization method is possible to find
by using another energy resources. Oxy-acetylene can be used as an energy
resource in atomization.
In this research, powders are made by oxy-acetylene atomization method.
Material in wire form is melted in oxy-acetylene flame, which has operating
temperature around 3480oC, and atomized to form a fine spray. The fine molten
droplets rapidly solidify forming a powders. This research investigate the
variation of wire diameter and flame gun attacking angle on atomization process
efficiency and production rate. Wire material which used in this research is
commercial steel wire with 0.75 mm; 1.25 mm; 1.50 mm in diameter. Flame gun
attacking angle is varied 25o, 30o, 35o, 40o,
and 45o.
Result shows that oxy-acetylene atomization method can be used to produce
metal powders. The characteristic of powders which produced by this atomization method have spherical shape,
75 m –
90 m in size, oxidized, and carburized.
The efficiency and production rate of the atomization process are around 12.2% and 0.1429 gram/minute. This
efficiency and production rate are
influenced by wire diameter. Bigger wire diameter results higher efficiency,
but lower production rate. For 1.25 mm diameter of commercial wire steel, an
optimum efficiency of atomization process, 15.1%, are resulted by 30o of flame gun attacking
angle.
Penulis: Muhammad Ridlwan,
Alva Edy Tontowi, Heru Santoso B.R
Kode Jurnal: jptindustridd050006
