High Speed Steel (HSS) Cast Rolls
High Speed Steel (HSS) Cast Rolls are used in front Finishing Or Continuous Stands of TMT Or Wire Rods & Hot Strips Rolling Mills. Good wear resistance and hardness at high temperatures, are defining features of HSS. Many types of carbides are present in these alloys, each having different effect upon their final Properties.
Many types of carbides are present in these alloys, each having different effect upon their final properties. As a result, nature, morphology and amount of these carbides are factors of importance Identification and characterisation of carbides were realised. MC, M2C, M7C3 carbides were found. Some relationships with mechanical properties were obtained especially in the field of the solidification sequence that affects grain size and carbides dispersion.
Features:
- Very good wear resistance on higher temperature and pressure.
- Low friction coefficient.
- Good resistance to rolling incidents.
- Good oxidation and thermal behavior.
Benefits:
Increased Productivity: HSS mill rolls are designed to have a longer service life than traditional cast mill rolls, reducing downtime for maintenance and replacement, resulting in higher output and reduced production costs. Improved Quality: HSS mill rolls have superior wear resistance, thermal conductivity, can reduce defects and improve surface finish for steel wire, resulting in higher customer satisfaction. Reduced Total Cost of Ownership: HSS mill rolls have an ability to maintain shape and properties for extended periods enable them to handle higher loads and rolling speeds, which ultimately translates to improved profits for the manufacturer.
| Chemical Composition (Range) | Physical Properties | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C% | Mn% | Si% | Cr% | Ni% | Mo% | V% | w% | Nb% | S% | P% | Hardness Range (Shore 0C) | Tensile Strength (N/mm2) | ||
| 1.50 2.20 | 0.40 1.20 | 0.30 1.00 | 3.00 6.00 | 0.20 1.00 | 3.00 6.00 | 2.00 5.00 | 1.00 4.00 | 0.50 1.50 | 0.030 Max | 0.030 Max | 700C - 900C | 350 – 450 | ||
Product Application
Application of High Speed Steel (HSS) Roll on Rolling Mill as below.
| Rolling Mills | Mill - Type | Stands - Position |
|---|---|---|
| Bar Rolling Mill Stands | 2,3 & 4 Hi | Roughing, Medium, Finished, Pre-Finished, Pre-Slitting, Slitting |
| High Speed Wire Rod Mill Stands | 2,3 & 4 Hi | Finished, Pre-Finishedm Slitting |
| Hot Rolling Narrow Strip & Sheet Mill Stands | 2,3 & 4 Hi | Rough, Finished |
| Spring Flat Steel Mill Stands | 2,3 & 4 Hi | Finished |
| Small Profile Steel Mill Stands | 2,3 & 4 Hi | All |
