Gas carbonization in general causes a softened layer on the surface and that could especially be a disadvantage to the metal fatigue. So, carbonization in a vacuum (low pressure) will decrease the chance of getting softened layers. In addition to that, because carbonization in high temperature can be possible, it takes a shorter amount of time and it is favourable for deeper carbonization parts.

Metallographic structure and treatment condition

Ferrite + perlite before treatment

Martensite after treatment

Equipment

Vacuum Furnace

The factroy is able to do

Numata Factory 2-23-1 ohzuka-nishi, , Asaminami-ku, Hiroshima-shi, 731-3167, Japan Tel. +81-(0)82-848-6021 Fax. +81-(0)82-848-6301