| Vacuum Carburizing
| Gas Carburizing |
Quality |
- Easy high concentration carburizing
- No grain boundary oxidation
- Good uniform carburizing capability for narrow gap/aperture and deep blind hole
- Ability to carburizing stainless steel
|
- Difficulty to high concentration carburizing
- Grain boundary oxidation (~5㎛)
- Bad uniform carburizing capability for narrow gap/aperture and deep blind hole
- Difficulty to carburizing stainless steel
|
Cost |
- Improvement productivity under short time and high temperature process (~1100℃)
- Unlimited inttermittent operating
- Less heat losses under vacuum operation
|
- Lower temperature process (~950℃)
- Heat radiation from furnace body
- Inttermittent operating need to keep temperature and gas condition
|
Environment |
- Zero CO2 emission
- Better work environment
|
- Much CO2 emission
- Hot work environment
|
Safe |
- Safety from vacuum and fireness
|
- Requires more attention to procedure than vacuum carburizing
|
Operation |
- Simply condition management
(only time & temperature)
- Experience not required
|
- Complexly condition management
(required gas management skill)
- Experience required
|