Process for reduction of time in gas carburizing process and cooling apparatus therefor

A process for reduction of time in gas carburizing process, the process comprising the steps of and characterized by:

• a) placing a part into an atmospheric carburizing furnace;
• b) maintaining the step-wise temperature of the carburizing furnace during the heating of the part in the carburizing furnace;
• c) heating the part at the first pre-set temperature for the duration of pre-set constant time interval while adding a hydrocarbon gas into the carburizing furnace;
• d) heating the part at the second pre-set temperature for the duration of pre-set constant time interval while adding the hydrocarbon gas along with methanol into the carburizing furnace;
• e) heating the part at the third pre-set temperature for the duration of pre-set constant time interval while adding the hydrocarbon gas into the carburizing furnace;
• and
• based on the requirement of the depth,
• f) heating the part at the fourth pre-set temperature for a duration of variable time and for variable carbon potential in accordance with the requirement by adding the hydrocarbon gas into the carburizing furnace;
• and
• g) heating the part at the fifth pre-set temperature for a duration of variable time and for variable carbon potential in accordance with the requirement by adding the hydrocarbon gas into the carburizing furnace;
• h) heating the part at the sixth pre-set temperature for a duration of variable time and for variable carbon potential in accordance with the requirement by adding the hydrocarbon gas into the carburizing furnace, and
• i) quenching the part using quenching oil flowing in the quenching oil circulation pipe, wherein the process resulting in reduced processing time and increased efficiency.