Salts and equipments

Ionic liquids offer a significant improvement in wear protection, sliding properties and fatigue strength on all kind of ferrous materials. A subsequent oxidizing quenching produce a major increase in corrosion resistance. Due to the main process characteristics like:

• • excellent reproducibility on high quality level
  • shortest treatment times
  • most negligible distortion
  • highest flexibility
• • easy to handle

This technology gives often superior results to that of galvanic layers and other nitrocarburizing processes.

Salts for nitrocarburizing:

With TENIFER® / TUFFTRIDE® / MELONITE®  we offer a sustainable technology for nitrocarburizing. Following the principle of circular economy used Durferrit salts are recyclable.

*TF 1 = MEL 1 (available only in USA)

Additive salts for inert annealing; cyanide-free

Additive salts for preventing decarburation

Carburizing and carbonitriding salt melts feature following advantages:

• • best temperature uniformity
• • high reproducibility of the carburizing effect
• • easy to control
• • very flexible in use

The DUROFER® process is an environmental friendly process as the products do not contain any cyanide. The carbon activity is controlled by adding the regenerator CECONTROL®. Hence the amount of waste salt is considerably reduced. This technology can also be used for hardening being free of decarburization as long as the melt is set for low activity.

DUROFER® Process

Other salts for carburizing and carbonitriding

Boriding is a thermochemical diffusion process that gives components the following property improvements:

• • very high hardness up to 2000 Vickers
• • outstanding abrasive wear resistance
• • temperature strength up to 800 °C
• • strongly reduced sticking properties

Our boriding product produces a very good coating quality and prevents the unwanted formation of the very brittle FeB-phase.

Boriding products

The quality of solution annealing and age hardened aluminium and aluminium alloys increases strongly with temperature uniformity as well as with the speed of heat transfer. For this reason salt melts are the first choice.

They are well known for their excellent temperature constancy and provide the following benefits for the heat treatment:

• •  quickest heat transfer by contact which successfully limits grain growth creating a very fine core structure
• •  avoidance of deleterious precipitation of alloying elements on grain boundaries since the remaining salt film on the parts prevents critical cooling effects during transfer into quenching station
• •  shortest treatment times

Salts for the annealing of aluminium and aluminium alloys

Solvent based stop-off compounds

Kneadable stop-off compounds