During plasma nitriding, in a vacuum at a temperature between 350 °C and 600 °C, in the presence of nitrogen and electric field, a plasma of accelerated atoms develops which collide against steel surface at a very high speed. A hard compound layer of nitrides is formed, followed by a diffusion layer and tough core.
In Micropuls® plasma nitriding, we use the processes of PLASNIT® and PLASOX® to control different compositions and structures of nitriding layers. By setting the right parameters, it is possible to perform the nitriding process without a white compound layer and achieve its controlled growth.
PLASMA NITRIDING AND NITROCARBURIZING (VERTICAL)
| Maximum workpiece dimensions | Maximum workpiece weight | Medium (surrounding substance) |
| φ 1000 × 1850 | 5000 kg | N₂+H₂+Ar+CH₄+H₂O |
Advantages:
- High surface hardness, better wear resistance, lower coefficient of friction, increased corrosion resistance,
- A wide range of steels which can be nitrided - low and highalloyed steels (high-speed steel, sintered steel, cast iron, stainless steel, ordinary construction steel, etc.),
- Less surface roughness in comparison with gas nitriding,
- Anti-corrosion and decorative effect (surface oxidation),
- Automated process with controlled growth of the white compound layer,
- High level of repeatability,
- Partial nitriding is possible through mechanical covering or covering with paste,
- Shorter times and lower temperatures ensuring minimal dimensional changes,
- Environmentally friendly process.
Applications:
- Parts for the automotive industry,
- Heavy-duty parts in mechanical engineering,
- Tools for plastics,
- Hot-work tools,
- Cutting tools,
- Die casting tools,
- Various machine parts: piston rods, pistons, mandrel, connecting rods, shafts, gears, etc.
