950热轧机试轧15.5mm厚带钢的生产实践

Practice of Producing 15.5mm Heavy Strip Through 950 Hot Tandem Mill

为挖掘轧线潜力,采用950热连轧机生产15.5mm超厚带钢,因厚度超出了轧机设计能力,存在轧件在精轧机组翘头严重及组织不均匀、产品强度偏低的问题。通过采用上辊压配置,增加中间坯厚度,降低开轧温度、终轧温度和卷取温度,轧后快冷的措施,试轧成功,成材率98.56%,综合合格率99.90%,并转入批量生产。

In order to tap the latent power of the rolling equipment, the 950 hot tandem mill is used to produce 15.5mm heavy strip. Because of the thickness outstrips the design capability of the rolling mill, there have some problems such as serious warping of the rolled piece in finishing mill train, heterogeneous structure and lower strength of the product. Then through adopting top roll pressure deployment, increasing the thickness of the intermediate strand, lowering start-rolling temperature, finishing temperature and coiling temperature and cooling rapidly after rolling, trial production succeed, with 98.56% rolling yield and 99.90% general percent of pass. Now it is put into batch production.