Low
Carbon Steel Shot FERROSAD FERROSAD
low
carbon steel shot gives a longer life and is more durable than high
carbon shot because it is relatively crack free. With high carbon
material the shotting operation produces surface cracks which are
extended in subsequent heat treatment. This does not occur in low
carbon shot because of its different structure. Microstructures
- the low carbon shot is produced by melting only deep-drawing low
carbon scrap. As a result of this the microstructure after the atomizing
process is a bainite structure (isothermal transformation), which
is tough and durable. The high carbon shot is produces by using
all kinds of scrap. Therefore the shot particles after atomizing
into water are very hard with surface cracks. The shot has to be
heat treated by quenching and tempering to remove the very coarse
martensitic structure. During this process the surface cracks can
be extended. |