Influence of Rare Earth Metals on Non-Metallic Inclusions in Cast Alloy Steels

Ca, To Duy (1998) Influence of Rare Earth Metals on Non-Metallic Inclusions in Cast Alloy Steels. In: Non-metallic inclusions in steels, 1998, NML, Jamshedpur.



The chromium and silicon steels usually have defects leading to lower fatigue and toughness characteristics and cracking in the use. A study of Cr27 & silicon Si3 steels has shown that they contain coarse aluminates and silicates which possess high elongation. Two series of heats were prepared with 0.5 kg/t to 2 kg/t rare earth metals (RE ) study 'then influence on these defects, Experiments were carried out in induction furnace (160 W). The results showed that oxygen and sulphur contents in silicon steels reduced from 0.0021% to 0.0028% and 0.001% respectively. The inclusion level was the lowest ( 0.0188 area %), when RE added into steel was 0.5 kg/t. The optimal residual RE content in chromium steel was 0.013%, and 92.68% inclusions had smaller size than 41tm. The samples (did not have inclusions of size over 10 um, The inclusions morphology was small-smooth globular of type Ib. The composition of inclusions corr- esponded to RE oxysulphides and complex oxysulphides.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:
Uncontrolled Keywords:Chromium & silicon Steels, Oxygen
Divisions:Corrosion and Surface Engineering
ID Code:3250
Deposited By:Sahu A K
Deposited On:11 Jul 2011 15:03
Last Modified:01 Dec 2011 15:11
Related URLs:

Repository Staff Only: item control page