TTN SPA

Oxidation has the aim to create a barrier between the steel of the mold and the molten aluminium, generating on the surface of the heat treated component a particular Oxide of Iron, Magnetite Fe₃O₄, delaying the bonding of the molten alloy to the mould.

PVD coatings are increasingly popular in the die casting industry due to their remarkable benefits and benefits as:

• Delay the surface damaging phenomena by protecting the substrate from wear and abrasion phenomena
• Favor for sliding between metal parts, placing a thin layer of coating characterized by high hardness properties
• They have high chemical inertia, therefore offer partial protection against corrosion
• Bonding and abrasion phenomena are avoided during molding

T.T.N. has different vacuum plants both with the possibility of quenching in high-pressure gas and with Salt Bath cooling.

With the salt bath cooling method, on big and complex moulds, it is possible to preserve optimum metallurgical properties, to safeguard deformations and to minimize the risk of breakages.

The maximum dimensions of the plants available are the following:

• Vacuum hardening with gas quenching: 1500x1500x1800mm, weight 5000kg
• Cooling methods available: Nitrogen up to 20 bar, Helium up to 20bar
• Vacuum hardening with salt bath quenching: 1200x1200x1800mm, weight 3500kg
• Gas Nitriding plants, dimensions up to: Ø4000 x 4000 mm, Ø1200 x 11000 mm, maximum weight 20 ton
• Plasma Nitriding plants, dimensions up to: Ø1000 x 12000 mm, maximum weight 20 ton
   
  In the company there is a technical staff composed of dozens of engineers, some of whom dedicated specifically to die-casting processes and can offer a consultancy service to foundries and mold makers about the issues and the correct moulds production cycles.

Thanks to this team we can ensure the periodic verification of calibration and uniformity of the whole pyrometric chain of the systems and, over the years, vacuum departments of the T.T.N. Group have been able to boast of the important certificates of approval of some of the most important European steel mills, certifications that allow us daily to treat pieces built with their steel for any customer.