The AvaC® Process: Vacuum Carburizing with Acetylene

Ipsen's AvaC® is a proven process for vacuum carburizing with acetylene. One of the most important advantages of this process is high carbon availability, ensuring extremely homogenous carburizing even for complex geometries and very high load densities. The AvaC process involves alternate injection of acetylene (boost) and a neutral gas, such as nitrogen, for diffusion. During boost injection, acetylene will only dissociate in contact with all-metal surfaces thus allowing for uniform carburizing. At the same time, it almost totally eliminates the soot and tar formation problem known to occur from propane.

The most remarkable benefit to AvaC can be found when the different hydrocarbon gases for low-pressure carburizing are evaluated for their penetration power into small-diameter, long, blind holes. Vacuum carburizing with acetylene results in a complete carburizing effect along the whole length of the bore because acetylene has a totally different carburizing capability than that of propane or ethylene.

AvaC Process Advantage Over Atmosphere Furnaces

The AvaC process provides the following features and benefits over conventional atmospheric furnaces:

  • Better work environment with cold-wall design, which provides lower shell temperature
  • No costly exhaust hoods or stacks required
  • Faster start-ups and shutdowns with no furnace idling over the weekends
  • No endothermic gas generators required
  • Gas quench furnaces require less floor space and no post-washing to remove quench oils
  • No pits or special foundation requirements needed

AvaC Furnace Configurations

The AvaC furnace can be provided in the following configurations and sizes.

Single-Chamber Work Space

24" W x 24" H x 36" L 
36" W x 36" H x 48" L 

Two-Chamber Work Space: Oil and/or Gas 

18" W x 18" H x 24" L
24" W x 24" H x 36" L
36" W x 36" H x 48" L

To discuss your vacuum furnace requirements, contact Mark Heninger, Director of Equipment Sales.

Download the AvaC Brochure (PDF)