ELECTROTHERMAL ROTARY BED CONDITIONS
B. Yordanov, D. Krastev, D. Kolarov
OBTAINING OF MOLYBDENUM CARBIDE IN AN ELECTROTHERMAL
ROTARY BED
D. Krastev, B. Yordanov, D. Kolarov
ELECTROTHERMAL ROTARY BED CONDITIONS
B. Yordanov, D. Krastev, D. Kolarov
|
University of Chemical Technology
and Metallurgy, 8 Kl. Ohridski, 1756 Sofia, BulgariaE-mail: krastev@uctm.edu
|
|
In this report some results of microstructure
investigation of tungsten carbides obtained in an electrothermal rotary
bed are obtained. The process has been carried out in the temperature
range 1300 - 1600°C in electrothermal rotary bed conditions. Tungsten
metal below 1 mm and graphite powder fraction 0.2 - 0.315 mm as raw materials
are used. X-ray diffraction, optical microscopy and microhardness test
study the products of synthesis show, that the carbidisation starts at
1300°C. The conversion into WC completes at 1600°C for particles
size below 0,1 mm. Microhardness of 24450 MPa for WC and 29950 MPa for
W2C are measured.
Keywords: electrothermal rotary bed, tungsten carbides obtaining.
OBTAINING OF MOLYBDENUM CARBIDE IN AN ELECTROTHERMAL
ROTARY BED
D. Krastev, B. Yordanov, D. Kolarov
|
University of Chemical Technology
and Metallurgy, 8 Kl. Ohridski, 1756 Sofia, BulgariaE-mail: krastev@uctm.edu
|
|
In this work some results of research
on Mo2C obtaining in an electrothermal rotary bed have been presented.
The process has been investigated in the temperature range 1400 - 1500°C
in electrothermal rotary bed conditions. For this purpose molybdenum size
below 1 mm and graphite powder fraction 0.1 -0.2 mm as raw materials have
been used. The products have been studied by X-ray diffraction analysis
and microhardness test. The conversion into Mo2C completes at 1500°C
for particles size below 0.315 mm for 60 min isothermal maintaining.
Keywords: electrothermal rotary bed, Mo2C obtaining
