Abstract
In Japan generally, they can use carrier gases for gas-carburizing obtained by converting mixture with air and town gas, charcoal gas or propan etc. The authors studied another source for such carrier gas. Good carrier gases were obtained by converting endothermically with a nickel catalyser, such a gas sources cracked light oil gas or carburated gasoline gas, suitably mixing with air. Using these carrier gases adding some hydrocarbon, the experimental results on gas carburizing were very successful.
From these experiments the authors concluded as follows.:
As the carrier gas for carburizing, the authors could produce suitable gas mixtures of cracked light-oil gas and air mixture converting between 900-980°C. As the best example, in which converting temperature was 900°C. and air to cracked gas ratio is 4, then the converted gas composition is 40% H2, 20.5% CO, 0.0% CO2, 0.5% CH4 and dew point -7°C. Moreover, we could produce proper carrier gas, using carburated gasoline converted gas, as shown in Table 1.
Carburizing power or carbon pressure, could be regulated by adjusting dew point and adding some hydrocarbon.
