会社のニュース What Are the Differences Between Hot Rolled and Cold Rolled Steel Coils in Slitting?

In steel production, hot rolled and cold rolled coils are two commonly used materials, and their behavior in the slitting process differs significantly. When choosing a Heavy Duty Steel Slitting Line Machine, customers must consider these material-specific requirements.

Hot rolled coils have relatively rough surfaces and lower hardness but usually come in heavier weights. During slitting, this requires a machine with strong load capacity and stability, especially a powerful uncoiler and a deep accumulator pit to handle uneven strip tension caused by heavy coils. In contrast, cold rolled coils feature smoother surfaces and higher hardness. High tensile cold rolled coils, with tensile strength exceeding 1000 MPa, are prone to burrs and camber, requiring high-hardness knives and precision tension control systems.

In practice, the 80mpm High-Speed Slitting Line accommodates both materials. For hot rolled coils, it ensures stable high-speed slitting, while for cold rolled coils, it delivers ±0.10mm accuracy with minimal burrs. Therefore, customers should configure their slitting line according to production needs to achieve optimal performance and cost-effectiveness.