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SERVICES
Machining Thermal and chemical-thermal treatment Galvanic protection Machining of engine parts Repair and verification of measuring instruments Testing of internal combustion engines and motor generators Regeneration of parts and assembly blocksRadio station testingBranding vehiclePhoto
OVERHAULING
Armored vehicles Unarmored vehicles Artillery weapons and firing arms Means of communication and electronics Instruments (optic and opt electronic) Hydraulic devices Missiles Electro aggregates, aggregates and installationsFire extinguishers and high pressure Photo
ENGENEERING
THERMAL AND CHEMICAL-THERMAL TREATMENT
Many years lasting collaboration with specialized firms and institutions as well as experience in spare parts production enabled fulfilling of the basic requests of the processes of thermal and chemical-thermal treatment through:
- High degree of mechanical and metallographic properties,
- Protection of the process from external influences,
- Precision of regulating parameters of thermal treatment, and
- Economy of processes
TECHNOLOGICAL POSSIBILITIES OF THE THERMAL TREATMENT DEPARTMENT
| Number | Type of thermal treatment | Material for thermal treatment | The aim of thermal treatment |
| 1. | Soft annealing | All types of steel, cast steel, gray iron and non-ferrous metals | Recrystallization and improving of treatment |
| 2. | Isothermal annealing | All types of steel, cast steel and non-ferrous metals | Economy of annealing, particularly in high-speed cutting steel |
| 3. | Annealing for dissolution of secondary cementite | Structural and high-speed cutting steel | Decreasing of brittleness and increasing ductility |
| 4. | Diffuse (homogenization) annealing | Structural and high-speed cutting steel | Equalization of local differences in structure after thermal treatment |
| 5. | Recrystallization annealing | Structural steel | Decreasing of interior tension (in the parts made by plastic deformation) |
| 6. | Intermediary annealing | Structural steel | Improving of treatment between the operations of processing |
| 7. | Bright annealing | Structural and high-speed cutting steel | Removing film of oxide and obtaining bright surface of the steel |
| 8. | Normalizing | Spring steel-alloyed steel (blacksmith's forgings) | Taking structure into "normal state" by unifying the size of the grain |
| 9. | Quenching | Stainless steels, heat-resistant steels, austenitic and ferritic steels | Homogenization and breaking of carbides and similar structural phases |
| 10. | Hardening | Structural and alloyed steels | Improving of mechanical properties (hardness) |
| 11. | Stress release | Steels for hardening | Decreasing of interior tensions after hardening and increasing ductility |
| 12. | Improving | Steels for improving (structural and tool steels) | Increasing ductility with high hardness |
| 13. | Surface hardening | Steels for surface hardening (below 0,25% of carbon) | Surface hardening while keeping ductile core |
| 14. | Nicotriding | All structural steels, tool steels and steels for improving | High surface hardness in small layer (20 microns), suitable in parts with thin walls |
TECHNICAL CHARACTERISTICS OF THERMAL TREATMENT
| Sort of equipment and type | Technical characteristics of the equipment | Note | |||
| Type of thermal treatment | The highest working temperature | Useful space (mm) | Maximal weight of melt (kg) | ||
| Multipurpose single chamber furnace, type TQF-4 (atmospheric) | -Annealing -Normalizing -Hardening in the protection of endogas -Surface hardening -Carbonitriding |
970 | 610x910x460 | 350 | All operations are performed in baskets for charging which dimensions are 500x810x100 |
| Multipurpose single chamber furnace, type DAC-6-ER (atmospheric) | -Tempering and annealing in the protective atmosphere -Nicotriding |
750 | 610x910x460 | 350 | All operations are performed in baskets for melt which dimensions are 500x810x100 |
| Single chamber furnace type D-6-ER in nitrogen protection | -Tempering -Annealing (soft recrystallization) |
750 | 610x910x460 | 350 | All operations are performed in baskets for melt which dimensions are 500x810x100 |
| Washing machine WP-4E | -Washing -Pickling |
80-95 | 610x910x460 | 350 | Total of 2500 liters of solution |
| Electric chamber furnace KP-90 | -Annealing -Hardening -Tempering |
950 | 900x640x120 | 300 | |
| Electric chamber furnace KP100 | -Annealing -Hardening -Tempering |
950 | 1000x600x1600 | 450 | |
| Electric chamber furnace KP-30 | -Annealing -Normalizing -Heating for hardening -Tempering |
1100 | 500x300x200 | 300 | |
| Electric shaft furnace JP 50/80 | -Annealing -Tempering (low temperatured) |
800 | 500x300x200 | 250 | |
For testing and following the quality of thermal and chemical-thermal treatment processes modern equipped laboratory is used, where the complete mechanical and metallographic testing and control of appearing internal and external defects in material by the method without destruction are done.