1. High hardness
The roll speed is high, the rolling product must have a certain surface quality, and the hardness and wear resistance are the main requirements. Then, the wear resistance of the roller is considered.
2. Wear resistance and impact resistance
There are some special requirements for rolls in some special environments, such as when the reduction is large, it is required that the rolls have strong bite force
High wear resistance and impact resistance.
3. Heat crack resistance
Generally, the rough roll needs strength and heat crack resistance, because the working roll weight of small 20 high mill is only about 100g, while the backup roll weight of wide and heavy plate mill is more than 200t.
4. Finish
When rolling thin products, the rigidity, uniformity of structure and properties, machining accuracy and surface finish of the roll are strictly required.
5. Cutting performance
When rolling section steel with complex section, the cutting performance of working layer of roll body should be considered.
