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Factors Affecting the Service Life of Work Rolls in Hot Rolling Mills
Release Time：
2025-03-19
This article introduces the operating conditions of the finishing mill work rolls at Ansteel's hot rolling mill and analyzes the main factors affecting the service life of the rolls. Specific improvement measures are proposed, such as ensuring sufficient cooling water during rolling and using hot rolling oil.
The main factors affecting the service life of hot rolling mill work rolls include:
1. Insufficient cooling water: Insufficient cooling water will cause the roll temperature to be too high, accelerating wear and thermal fatigue, and affecting the service life of the work roll.
2. Improper use of hot rolling oil during the rolling process: Insufficient or improper use of hot rolling oil will affect the lubrication effect of the rolls, increasing wear and thermal damage.
3. Inappropriate roll storage temperature: Too high or too low roll storage temperature will affect its performance and service life.
4. Bearing quality problems: Bearing quality problems, such as roll runout, will shorten the bearing life.
5. Roll stress conditions: The stress conditions of the rolls are complex, including factors such as load and temperature changes. These factors can lead to roll fatigue failure, crack generation, and surface material spalling, thus affecting its service life.
6. Concentricity error of the bearing seat: Excessive concentricity error of the bearing seat will cause roll runout, which in turn will affect the bearing life.
7. Abnormal axial force generated by the intersection of rolls: This force will damage the thrust bearing, shortening the bearing life.
Specific measures to extend the service life of work rolls include:
1. Ensure sufficient cooling water: Ensure sufficient cooling water during rolling to reduce roll temperature and reduce thermal fatigue and wear.
2. Reasonable use of hot rolling oil: Add an appropriate amount of hot rolling oil to ensure good lubrication, reduce wear and thermal damage.
3. Select a suitable roll storage temperature: Select a suitable storage temperature to avoid the influence of too high or too low temperature on roll performance.
4. Improve bearing quality: Select high-quality bearings to reduce roll runout and extend bearing life.
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