HIGH SPEED STEEL ROLLS FOR HOT STRIP MILLS
The microstructure consists of tempered bainitic / martensitic matrix with primary and secondary carbides. Primary carbides MC, M7C3, M6C and M2C are originated during the eutectic solidification. Secondary carbides are precipitated during the High Temperature quench and tempering. The rolls are cast with the right structure to undergo the High Temperature quenching to promote the right precipitation of secondary carbides and optimum material properties. Excellent wear resistance and fire crack resistance and very good oxidation behaviour at rolling temperatures under the adequate rolling conditions are the main features of this grade.
Application
- Early finishing stands work rolls (F1-F4) of HSM
- Early stands CSP Mill Work Rolls
- Finishing stands bar mill rolls
Materal Grades
|
MATERIAL |
CHEMISTRY |
BARREL HARDNESS (HSC) |
|||||||
|
C |
Si |
Mn |
Cr |
Ni |
Mo |
V |
W |
||
|
HSS |
1.50-2.20 |
0.30-1.00 |
0.40-1.20 |
3.00-8.00 |
0.50-1.50 |
2.00-8.00 |
2.00-9.00 |
0.00-8.00 |
75-85 |
TYPICAL PHYSICAL PROPERTIES
|
Neck Hardness (HSC) |
Tensile Strength (N/mm2) |
Unevenness of Barrel Surface Hardness (HSC) |
Difference of Shell Thickness |
|
30-45 |
shell ≥800 core & necks ≥400 |
＜3 |
＜10 |
HARDNESS
DISTRIBUTION
Microstructure
100x
500x
Products Categories
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Features
of High Speed Steel Rolls For Hot Strip Mills
- Excellent Wear Resistance under High Load and Speed
A tempered martensitic matrix reinforced with finely dispersed MC, M₂C, and M₆C carbides ensures stable wear performance under high rolling loads and high line speeds.
- Superior Thermal Fatigue and Crack Resistance
Optimized carbide size and distribution reduce thermal stress concentration, effectively suppressing thermal crack initiation and propagation during severe heating–cooling cycles.
- Outstanding Hot Hardness Retention
High-speed steel exhibits excellent red hardness, minimizing hardness degradation at elevated temperatures and supporting long and stable rolling campaigns.
-
High Strength and Accident Resistance
The combination of high strength and good fracture toughness provides reliable resistance to spalling, edge chipping, and rolling accidents in demanding hot rolling conditions.
Packing Details
Seaworthy crates, wooden boxes or steel pallets
Production time
4-6months
Shipping
Sea freight, Land freight and Air freight
Warranty Time
Whole lifetime warrantee
Production Progress
A specialized production control system is applied throughout roll manufacturing, covering material preparation, casting/forging, heat treatment, machining, and inspection. Strict control of key processes ensures stable roll performance, consistent quality, and reliable delivery.
TSR is a professional supplier of mill rolls and related technical services. Backed by an expert team of PhDs specializing in materials science and metallurgy, TSR is committed to becoming a world-class provider of roll technology and services.
With over 20 years of dedicated experience, TSR has been supplying high-quality mill rolls and reliable technical support to steel producers worldwide. Our products are successfully applied on more than 100 rolling mill lines across 30+ countries and regions, including France, Spain, South Korea, Vietnam, India, Brazil, and Mexico.
PRODUCTION CAPACITY
At TSR, we believe that continuous improvement leads to perfection. We consistently upgrade our advanced CNC equipment to ensure excellence throughout the production process.
MELTING
EBT Arc furnace: 55T
LF Refining furnace: 55T
VD+VOD: 55T
IM frequency furnace (8 sets): 20T
CASTING
Horizontal Spin Casters
Ø 1,600 mm x 4,500 mm B.L.
Ø 1,400 mm x 3,000 mm B.L.
Ø 800 mm x 2,600 mm B.L.
HEAT TREATMENT
Electrical furnaces
18 sets – bogie type
7 sets – low-temperature
11 sets – high temperature
Differential Heat Treatment
Furnaceφ1600 mm x 2800 mm B.L.
Spray quenching machine
Max φ1800mm
MACHING
CNC Lathe: 32T
CNC Grinding machine50T
Turing and Boring machine: 63T
Boring machine
QUALITY CONTROL
The high-performance demands of today’s mills require reliable rolls that can remain in the production cycle longer than ever, while ensuring high-quality rolled products. TSR has built a consistent quality control system throughout the entire manufacturing process. Our aim is to supply customers with reliable rolls that deliver better performance, contributing to customer benefit, cost reduction and satisfaction.
Dimentional
Inspection
Microstructure
Inspection
Ultrasonic
Inspection
Lismar
Environmental friendly package
Low-carbon operation of each equipment, recycling of every piece of metal, and environmental optimization of each process — these are TSR’s solemn commitments to the Earth. Even the smallest details of our packaging reflect TSR’s responsible attitude toward environmental protection.
- Seaworthy steel pallets
- 100% recyclable materials
- Unpainted steel pallets
- Optimized packaging design to minimize material consumption
Service and Support
Trust and Worth
Our Clients
