The progressive types of technologies including all operations: metallurgical , press-forging, heat-treating, mechanical-assembling are used when producing the products mentioned above.
Steel making for rolls is performed in electric arc furnaces. When forging ingots the temperature and technological conditions are endured. Both volume and surface hardening by industrial frequency current and high frequency current is used widely.
The mechanical-assembling production is provided with modern equipment including CNC
machines and fine finishing machines of high accuracy and etc.
Systematic increase of durability and wear resistance of rolls is achieved by :
- research and use of new and more strength materials;
- improvement of production technology;
- strict observance of the service conditions at the Consumer.
High-alloyed steels are used for manufacturing of work and back-up rolls.
Roll operation analysis at the Consumer confirms high durability and wear resistance of the rolls manufactured by the EZTM Joint Stock Company.
Rolls with the EZTM trade-mark operate at metallurgical enterprises of Russia, Kazakhstan, Uzbekistan, Ukraine as well as in Bulgaria, Cuba, Czechia, France, Germany, India, Iran, Mongolia.
TECHNICAL DATA OF COLD AND HOT ROLLS
|
Name |
Barrel diameter, mm |
Length, mm |
Weight, kg |
Material: steel |
Hardness HSD |
Active layer depth, mm |
Machining cleanness of barrel/ neck |
|---|---|---|---|---|---|---|---|
|
Cold rolls |
|||||||
|
Solid-forged and sleeve back-up rolls
|
110-1500 |
800-4500 |
50-20000 |
Cr content, Cr 2-5 % 9Х1, 9Х2, 55Х, 9Х2МФ, 45ХНМ |
50-85 |
30 |
0,8, 0,8 √ / √ |
|
Warm work rolls |
110-700 |
600-5000 |
50-15000 |
5Х5М1ФС, 9Х1, 9Х2, 55Х, 45ХНМ |
75-90 |
30 |
0,8 0,8 √ / √ |
|
Cold work rolls |
100-1500 |
800-10500 |
50-15000 |
Cr content, Cr 2 -5 % Si content, Si≤ 2 % Х12МФ, 5Х5М1ФС, 9Х1, 9Х2, 55Х, 9Х2МФ, 7Х2СМФ, 45ХНМ |
90-105 |
20 |
0,8 0,8 √ / √ |
|
Hot rolls |
|||||||
|
Solid-forged and sleeve back-up rolls for sheet mill |
100-2500 |
800-10500 |
50-70000 |
150ХНМ С content, С -1,5 % 50,50ХН, 90ХН, 55Х, 60ХН, 60ХГ, 9Х1, 9Х2МФ, 90ХФ |
75 (HSD) 302…362 (НВ) 360-400 (НВ) 187-302 (НВ) |
- - - |
3,2 0,8 √ / √ |
|
Hot work rolls |
350-2000 |
800-10500 |
200-70000 |
Х153СrMoV12 150ХНМ С content, С -1,5 % 50,50ХН, 55Х, 60ХН, 40ХН, 45ХНМ, 60ХГ, 9Х1, 9Х2МФ, 90ХФ |
75 (HSD) 302…362 (НВ) 360-400 (НВ) 187-302 (НВ) |
- - - |
3,2 0,8 √ / √ |
|
Sleeves |
100- 2500 |
500-1500 |
100- 6000 |
150ХНМ С content, С -1,5 % Х12МФ |
302…362 (НВ) 360-450 (НВ) |
- - - |
3,2 0,8 √ / √ |