SiC의 유도로 적용

Use of SiC in the Induction Furnace

(유도로에서 탄화규소 적용)

Pierre-Marie Cabanne, Sorelmetal Technical Services

 

Silicon carbide has only recently been used outside of steel works.

Its appearance in cast iron/Ductile Iron foundry goes back only a few decades.

Of all the items already presented, probably the most important is the role of SiC on nucleation and preconditioning of the iron.

As Sorelmetal does, SiC also generates more seeds in the liquid cast iron and improves graphitization!

For the graphitization, Benecke(1) presents the following explanation :

Si and C coming from the dissolution of SiC would be concentrated on a micro level in the liquid iron and would thus give locally an hyper-eutectic character which naturally promotes graphitization.

This of course reduces the chilling tendency and amount of undercooling.

In the same way,

during long holding times following stopping of moulding lines or after holding over a weekend, an addition of 2 lb (1 kg)/ton of SiC on the cleaned bath with 15 lb (7 kg)/ton of Sorelmetal, will reduce chill values and make it possible to maintain an acceptable level of graphitization.

 

원문 :  http://blog.daum.net/phase-diagram