Research on causes for roll sticking copper and anti-sticking measures in hot rolling considering rolling interface state
By: Chen, Guo-xing
.
Contributor(s): Guo, Hao-tian.
Publisher: USA Springer 2022Edition: Vol.103(6), Dec.Description: 1423-1431p.Subject(s): Mechanical EngineeringOnline resources: Click here
In:
Journal of the institution of engineers (India): Series CSummary: In view of the roll sticking copper problem in the second pass of the SCR3000 copper rod continuous casting and rolling production line, a finite element model was established in combination with the actual roll size and rolling process parameters of the second pass by DEFORM finite element software, and the correctness of the model was verified by comparing the simulation result of rolling force with that of the theoretical calculation. It was found that the strain, stress and temperature at the corners of the workpiece were the highest in the rolling interface. The high strain means that the copper substrate was easier to extrude from the cracks of the oxide layer, and come into contact with the roll surface. The high stress and temperature mean that the welding phenomenon was more likely to occur when the copper substrate and roll surface come into contact. Since the adhesion energy of Cu–Cu is lower than that of Fe–Fe and Fe–Cu, pure copper will tear from the substrate and adhere to the roll surface after welded. This is an important reason why the corners of the workpiece were more prone to sticking problem, which is consistent with the actual sticking situation. The effect of friction coefficient and roll gap size on rolling interface state and sticking phenomenon were analyzed by finite element models. It was found that the smaller the friction coefficient and the larger the roll gap, the less obvious the sticking phenomenon was. The anti-sticking measures of appropriately reduce the rolling friction coefficient and increase the roll gap size were put forward.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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Articles Abstract Database
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School of Engineering & Technology Archieval Section | Not for loan | 2023-0533 |
In view of the roll sticking copper problem in the second pass of the SCR3000 copper rod continuous casting and rolling production line, a finite element model was established in combination with the actual roll size and rolling process parameters of the second pass by DEFORM finite element software, and the correctness of the model was verified by comparing the simulation result of rolling force with that of the theoretical calculation. It was found that the strain, stress and temperature at the corners of the workpiece were the highest in the rolling interface. The high strain means that the copper substrate was easier to extrude from the cracks of the oxide layer, and come into contact with the roll surface. The high stress and temperature mean that the welding phenomenon was more likely to occur when the copper substrate and roll surface come into contact. Since the adhesion energy of Cu–Cu is lower than that of Fe–Fe and Fe–Cu, pure copper will tear from the substrate and adhere to the roll surface after welded. This is an important reason why the corners of the workpiece were more prone to sticking problem, which is consistent with the actual sticking situation. The effect of friction coefficient and roll gap size on rolling interface state and sticking phenomenon were analyzed by finite element models. It was found that the smaller the friction coefficient and the larger the roll gap, the less obvious the sticking phenomenon was. The anti-sticking measures of appropriately reduce the rolling friction coefficient and increase the roll gap size were put forward.
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