Ipsen Vacuum Carburizing Process with Acetylene

Vacuum Carburizing with Acetylene (AvaC®)

The AvaC® vacuum carburizing process is a technology exclusive to Ipsen that uses acetylene to virtually eliminate the soot and tar formation problem known to occur from propane, while greatly increasing carburizing power even for blind or through holes.

One of the most important advantages of the AvaC® 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 allowing for uniform carburizing.

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.

Benefits of the AvaC® process:

  • Continuous high-throughput capability
  • Guaranteed process repeatability
  • Optimum acetylene gas deployment
  • Open, maintenance-friendly modular system
  • Increased carbon transfer
  • Reduced process time
  • Improved microstructure, increased stress resistance, and superior surface quality of parts
  • Economical extendibility for capacity increase
  • Various quenching capability with helium, nitrogen, mixed gases, or oil

Advantages over atmosphere 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
  • 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:

Single-chamber design
24" x 24" x 36" (610 mm x 610 mm x 914 mm)
36" x 36" x 48" (914 mm x 914 mm x 1,219 mm)

Two-chamber design (oil and/or gas)
24" x 24" x 36" (610 mm x 610 mm x 914 mm)
36" x 36" x 48" (914 mm x 914 mm x 1,219 mm) 

To discuss your furnace requirements, contact Director of Equipment Sales Mark Heninger, or fill out our request a quote form.


View the Technical Paper Optimizing Case-Depth Uniformity in High-Quality Gears: An In-Depth Study of the AvaC® Process

View the Technical Paper AvaC® - Acetylene Vacuum Carburizing.