JSC “PNITI” – one of the first in Russia has mastered a technology of ion-vacuum nitriding of metals. Since 1975 the institute is engaged in introduction of technology and production of installations for ion-vacuum nitriding of various modifications and also renders services in ion-vacuum nitriding of products and parts.
Ion nitride hardening is a low- temperature thermo- chemical process performed in glow– discharge plasma in a gas- nitrogen- rich medium. Ions of nitrogen are accelerated by the electrical field and than bombard the part surface creating conditions for atomic nitrogen active diffusion into a crystal lattice of a metal, resulting in forming a nitrated case with increased hardness.
Through changing kinetic and gas dynamic parameters of this process it is possible to receive high- qualitative coatings of regulated structure with optimized complex of properties, based on the operating conditions requirements.
At the ion- nitriding of parts, including parts of complex shape a nitrided layer of the uniform thickness is formed.
Advantages of ion nitriding technology:
- high speed of diffusion;
- forming of diffused layers of the given phase structure and composition;
- insignificant deformations of products when processing and a high class of roughness;
- forming of a nitrided layer of the uniform thickness on all surfaces of the part;
- high profitability of the process, increase in efficiency of the electric power;
- process is environmentally friendly and non-toxical, installation meets the requirements for environment protection and can settle down in mechanical shops.
The conventional limit of corrosion endurance of the nitrided steel is 6 times more than of the not nitrided steel.
Up-to-date electronic base has allowed to switch over to the use of a pulse glow- discharge resulting in the increase of work reliability of installations.
Now JSC “PNITI” produces installations with a power up to 200 kW, diameters of 600/800/1000/1200 mm and height from 600 to 6000 mm.
Production of installations for ion nitriding is conducted under orders and according to pre- agreed specifications. Time of manufacture of one installation – 6-12 months, depending on power and sizes of chambers.
Technical characteristics
| Parameters | ION-50 | ION-100 | ION-200 |
| Working volume, m3 | 0,1 – 1,0 | 1,0 – 4,0 | 4,0 – 10,0 |
| Size of working space, mm | 500 х 600 780 х 1000 780 х 1500 780 х 2000 1000 х 1000 |
780 х 3000 1000 х 1000 1000 х 2000 1200 х 1500 |
1200 х 4000 1200 х 6000 |
| Weight of a charge, kg | 180/ 1500 | 2000/ 3000 | 5000 |
| Supply voltage | 3/ 380 V, +5% – 10%, 50 Hz | ||
| Rated power, kW | 50 | 100 | 200 |
| Working pressure, mm Hg | 1- 10 | ||
| Working gas | Ammonia, GOST 6221 – 90 | ||
Guaranteed results
| Type of parts and tool | Steel | Layer thickness, mm | Hardness of surface, HV |
| Gear wheels, screws, plungers, crankshafts and camshafts screw feeds, cylinders, axes, bushings, sleeves |
45 20Х 40Х 40ХМА 18ХГТ 38ХМА 38ХМФА 38Х2МЮА 12Х2Н4А 35ХГСА 38ХН3МФА 12Х18Н10Т 20Х13 |
0,3 – 0,4 0,3 – 0,5 0,2 – 0,5 0,25 – 0,5 0,25 – 0,5 0,3 – 0,6 0,3 – 0,5 0,2 – 0,5 0,2 – 0,5 0,2 – 0,5 0,2 – 0,5 0,05 – 0,15 0,05 – 0,2 |
450 – 600 450 – 600 600 – 750 650 – 850 650 – 750 650 – 850 850 – 1100 850 – 1250 550 – 700 650 – 720 450 – 750 900 – 1250 900 – 1250 |
| molds, dies |
5ХНМ 5ХНМФ 3Х2В8 4Х4ВМФС 30Х3М3Ф |
0,2 – 0,3 0,15 – 0,3 0,15 – 0,3 0,15 – 0,3 0,15 – 0,3 |
600 – 700 600 – 700 900 – 1100 900 – 1150 900 – 1100 |
| stamping tools, movable dies for deep drawing and other |
Х12 Х12М Х12МФ |
0,06 – 0,15 0,06 – 0,15 0,06 – 0,16 |
900 – 1100 900 – 1100 900 – 1100 |
| milling cutters, drills, screwing taps, reamer bits, broaching bits, cutters |
Р18 Р6М5 Р9К10 |
0,01 – 0,05 0,01 – 0,05 0,01 – 0,05 |
900 – 1200 900 – 1200 900 – 1200 |
