道次间冷却对厚板控制轧制变形行为的影响

 厚规格钢板轧制中低压缩比难以消除连铸坯心部缺陷，容易引起厚规格钢板性能波动。采用数值模拟和试验研究相结合的方法，详细分析了道次间强冷却工艺对厚规格板坯温度变化和轧制变形的影响规律。结果表明，采用道次间强制水冷的方式进行“温控-形变”耦合控制，可以有效提高厚规格钢板心部变形量，改善内部质量。对比分析可知，高温粗轧阶段采用道次间冷却对钢板心部变形影响较大；精轧阶段进行道次间冷却，对钢板心部变形影响相对较小，同时将显著提升道次轧制力。

Influence on deformation permeability of plate by controlled rolling process with inter-pass water cooling technology

The differential temperature rolling method using inter-pass water cooling technology was introduced in this paper to reduce the internal defects of heavy plate,such as shrinkage and cracking,from the continuous casting slab in the hot rolling process. The influence of water cooling process on the temperature evolution and rolling deformation of steel plate was analyzed by numerical simulation and experimental study. The results show that the method of"tempera-ture and deformation control"from water cooling process can effectively increase the deformation permeability inside heavy steel plate and improve its quality. The deformation inside the steel plate during high temperature rough rolling with the inter-pass cooling is significant,but is relatively small during the finish rolling process. In addition,for finish rolling with inter-pass water cooling technology,the rolling force is significantly increased and the rolling load is in-creased.