Vacuum carburizing of gears has typically been limited to partswith relatively small cross-sections. Most alloys currently in userequire oil quenching to achieve adequate surface hardness and coreproperties in large gear applications. Pit or large batch IQfurnaces with endothermic atmospheres are often used to processthis type of gear. The majority of vacuum carburizing equipment isdesigned for processing smaller parts with a high pressure gasquench.
Recent equipment and process developments allow vacuumcarburizing and oil quenching of very large gears and pinions – upto 70″ diameter and 7,000 lbs. Fixture design and careful processcontrol help minimize distortion, while providing the caseuniformity and surface integrity that is unique to vacuumcarburizing.
This paper will discuss specific case studies involving largegears and pinions. Distortion, case hardness profiles andmicrostructures from conventional gas carburizing and vacuumcarburizing will be examined and compared.
- Edition:
- 13
- Published:
- 09/01/2013
- Number of Pages:
- 7
- File Size:
- 1 file , 570 KB
Reviews
There are no reviews yet.