BHAT METALS RESEARCH PVT.LTD.

Vacuum Heat Treatment

Brazing

Plasma ION Nitriding

Gallery

GM Ent. USA

Vacuum Heat Treatment, Heat Treatment, Heat Treatment Shops, Annealing Shops, Hardening Shops, Nitriding Work, Tempering Shops
 
 

Plasma ION Nitriding

 

Plasma Ion Nitriding is a process for surface treatment of metal parts to make them resistant to wear and fatigue.Parts to be treated are placed in a vacuum chamber and a high DC voltage (typically around 1000 volts) is established between the parts and the chamber wall. As nitrogen gas is introduced into the chamber, a glow discharge plasma (ionized gas) builds up around the parts. The reactive nitrogen atoms thus bombard the surface, forming a thin layer of hard metal nitrides.

Advantages of Plasma Nitriding are :-

  • Glow discharge that envelopes the entire surface achieves a consistent hardness and case depth. This is specially noticeable on complex geometries where gas nitriding case depths can be non-uniform. 
  • Plasma nitriding (H2+N2) least affects the surface finish of the product. Salt bath and gas nitriding, which uses ammonia (NH3) and phosphate for activa- tion , will roughen a ground or polished surface. 
  • Higher surface hardness is achieved at lower processing temperatures (500 ºC). Thus distortion is almost zero and no changes in the properties at the core of the material

 

Schematic of Plasma Furnace
Schematic of Plasma Furnace
 
Plasma Process
Plasma Process
 
Comparison of Plasma Techniques

Comparison of Plasma Techniques