Hot working Die steel rolls possess high thermal strength, excellent thermal stability, good wear resistance, resistance to cold and thermal fatigue, and stable resistance to tempering. Using this material to manufacture blooming rolls for large section steel significantly enhances the rolls' lifespan.

Specific performance characteristics include:

High Thermal Strength: This enables the rolls to maintain structural stability and strength at high temperatures.

Excellent Thermal Stability: Indicates that the rolls perform well in high-temperature environments, resisting deformation or failure.

Good Wear Resistance: This is a key characteristic in roll materials, contributing to an extended lifespan, especially when processing high-strength metals.

Resistance to Cold and Thermal Fatigue: Signifies that the rolls can maintain their performance when subjected to cycles of cold and thermal stress, minimizing the risk of fatigue cracks.

Stable Resistance to Tempering: This property allows the rolls to maintain hardness and performance during cooling after high-temperature operation, reducing the risk of material softening due to tempering.

Code	C	Si	Mn	Cr	Ni	Mo	V
HWD I	0.50-0.60	0.10-0.60	0.30-0.80	0.50-1.00	1.30-1.80	0.10-0.50	-
HWD II	0.40-0.50	0.30-0.80	0.30-0.80	1.50-2.00	0.70-1.20	0.70-1.20	0.30-0.80
HWD III	1.40-1.60	0.10-0.60	0.30-0.80	10.0-14.0	-	0.70-1.20	0.80-1.50

 

Code	Hardness      HS	Tensile Strength Mpa	Dimension mm	Weight             kg	Application
HWD I	40-50	≥1000	600~1600	5000-50000	Blooming and Roughing stands of large section mills Hot-rolled strip steel mills-roughing rolls, back up rolls.
HWD II	50-60	≥1100
HWD III	55-65	≥500（core）			Universal mills- vertical rolls, edger rolls.

 

Overall, using hot work tool steel to manufacture blooming rolls for large section steel significantly increases the rolls' lifespan, ensuring superior performance in high-temperature and high-load working environments.