Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.

 
       
         
    STUDIA CHEMIA - Ediţia nr.3 din 2012  
         
  Articol:   HARD CHEMICAL CONSTITUENT EVIDENCE IN FERROMANGANESE ALLOYED POWDER FeMn80C20.

Autori:  CRISTIAN SUCIU.
 
       
         
  Rezumat:  

The mechanical properties of sintered steels are depending mainly on the powder microstructure. The paper presents studies of ferromanganese powder obtained by milling. The X-ray diffraction analysis evidenced two chemical compounds: the major compound is FeMn4, and some traces of complex ferromanganese carbide Fe1.1Mn3.9C2. The carbide hardness is 2365 HV0.02. They are dispersed in the major micro structural constituent, α Mn phase. The observed microstructure prove that α Fe appears only as phase in a pearlite like eutectoid constituent. It appears as a grey lamellar micro structural constituent having an average grain size of 50 μm. This constituent feature present hardness values lower than 715 HV0.02. Finally, we could conclude that the particle size do not affects the powder composition and micro structural constituents'' distribution. The particle size affects only the technological properties as apparent density and the flow rate.

 

Keywords: ferromanganese powder, hard compounds, phase distribution

 
         
     
         
         
      Revenire la pagina precedentă