Killed steel and semi killed steel
Killed steel and semi killed steel
(OP)
Dear all,
What is the main different between killed and semi killed steel? If the aluminum is used as oxidizer for semi killed steel and produced aluminum oxide inclusions it is by having fully killed steel will has lower amount of aluminum oxide inclusion and other inclusions? If I want to reduce inclusions in carbon steel which steel is better killed or semi killed?
Any comment are highly appreciated.
What is the main different between killed and semi killed steel? If the aluminum is used as oxidizer for semi killed steel and produced aluminum oxide inclusions it is by having fully killed steel will has lower amount of aluminum oxide inclusion and other inclusions? If I want to reduce inclusions in carbon steel which steel is better killed or semi killed?
Any comment are highly appreciated.
RE: Killed steel and semi killed steel
Still a few points before that:
1. Steelmaking is a process of oxidation while iron-making is a process of reduction. So, presence of oxygen in steel is inevitable.
2. Killed steel has negligible oxygen content, while oxygen is hardly removed in rimming steel. Semi-killed falls between these two.
3. Production of killed steel, therefore, involves secondary steel-making, ladle treatment, etc while semi-killed may not have all of these.
4. Killed steel is most expensive.
5. Inclusion content is least in killed steel.
6. Piping loss during ingot solidification is negligible in killed steel while it is considerable in semi-killed.
Read more about ladle metallurgy, why Silicon is used, what does it remove and then why do we use Aluminium?
DHURJATI SEN
RE: Killed steel and semi killed steel
RE: Killed steel and semi killed steel
Thank you... I suppose having killed steel is less inclusion than semi killed
weldstan ...thank you ..So Aluminum is rarely used as oxidizer compared to Si....Any reason for this?
RE: Killed steel and semi killed steel