C70 cost-effective forged steel cold roll
The C70 high cost-effective cold roll developed by Sinosteel Xingji uses the most advanced equipment and process methods, plus the most accurate process parameters, which improves the comprehensive performance of the product by more than 30%, with higher wear resistance and roll shape. Maintain capacity and resistance to accidents.
Relative abrasion resistance is improved by more than 30% compared with Cr5 material; the matrix micro-hardness is maintained above 730 HV in the entire working layer; the material has good hardenability and has good iso-hardness, and there is no obvious hardness difference in the working layer.
R & D background
At present, steel companies are pursuing "two improvements and one reduction", namely how to improve sheet quality, how to improve production efficiency, and how to minimize costs. The market desperately needs a cost-effective product with higher performance but less price increase. C70 is a new product developed in response to market needs.
Currently, the mainstream material of forged steel cold rolls is Cr5 (also called MC5). With the continuous improvement of the strength grade of rolling materials, the surface quality of rolling materials, and the rolling rhythm, Cr5 rolls have shown signs that they cannot meet the new rolling requirements. Especially in the late stage of roll use, due to the decrease of roll surface hardness and wear resistance, the roll change cycle is further shortened, which directly affects the surface quality.
The development and application of the application value of Cr5 rolls has reached a high point. There is very little space for improving quality and efficiency through management. It is necessary to seek greater space for cost reduction from the roll material upgrade.
After use verification, compared with Cr5 rolls, this product can increase the roll change cycle by 10-30%, reduce the grinding amount by 10-20%, increase the millimeter rolling amount by about 40%, and increase the overall cost-effectiveness of the product by about 30%. On all cold strip mills.
Parity and high quality are the most significant features of C70 cost-effective cold rolls. Relying on its excellent cost performance advantages, C70 high cost performance cold rolls are more able to adapt to the comprehensive demand of rolls of steel companies at this stage, which will definitely be a great help for steel companies to improve quality, reduce costs and increase efficiency.