In this video, we take you through the quenching and tempering process of cold rolling mill rolls at Zhenghui Rolls' original factory. The tempering temperature is crucial for achieving the desired hardness and mechanical properties of the rolls.

Key process highlights include: - Tempering temperatures for different hardness levels: 140-150℃ for rolls with hardness greater than 90HS and 310-330℃ for 70-85HS. - The necessity of a second tempering after precision turning and rough grinding for rolls with hardness greater than 95HS. - Austenitizing and normalizing at medium temperatures around 800-880℃ to achieve a balanced matrix with high mechanical properties. - The importance of a slow heating rate (≤ 20℃/hour) during tempering to prevent thermal stress and potential fractures. This video provides a deep dive into the critical steps of the heat treatment process, ensuring the longevity and high performance of the cold rolling mill rolls used in various industrial applications. Video would shot in the workshop of #zhrolls , who has engaged in supplying

Click on the image to see that the tempering temperature is critical to achieving the required hardness and mechanical properties of the roll.