Akademik Veri Yönetim Sistemi
Boz M. (Yürütücü)
Yükseköğretim Kurumları Destekli Proje, 2017 - 2018
In
this study, which have been made the design and manufacture of the gas
atomization unit. The Gas Atomization Unit consists of seven basic sections.
These sections can be indentified as; Melting furnace, Atomization tower, Nozzle,
Powder collecting division, Cyclone and Gas pressure ramp and control board. The melting furnace is designed to be capable of operating
at temperatures up to approximately 1200 oC. With the aim of prevent the
oxidation of molten metal and produced powder, from the sides the of the melting
furnace and from tower Argon gas is continuously being sprayed. The melting
process is carried out in graphite or stainless steel melting pot according to
the chemical composition of the material. A graphite stopper is used to control
the flow of molten metal in the ladle. The temperature control of the molten
metal is done by way of two thermocouples, which are immersed in the ladle and
located outside the ladle. The atomization
tower is manufactured from stainless steel with dimensions which will produced
powders not collide the wall of the atomisation tower. The powders are gathered
in the powder collection section at the bottom of the atomization tower. Two
cyclones were designed to decrease the gas pressure in the atomisation tower
and to separate the fine powders. Along the way the atomization process, three
argon tubes are appended to the gas ramp so that it does not fluctuate and the
gas pressure does not change. For powder production, supersonic and closely matched nozzle are used. The nozzle is located on a
nozzle holder device in the furnace. Al and Mg alloy powders were produced
first with the gas atomization unit manufactured and designed. It was
ascertained that the powders produced were between 0,1 microns and 750 micron
and size of the 90 percent of the produced powders were below 100 microns. Besides
it was observed that size of powders was decreased depending on the increase of
the gas pressure and changed their shapes from ligament to spheroidal.