热轧高强双相钢卷取成卷后,带钢头尾位于钢卷内外圈,冷却速率大于带钢中部,头尾性能不满足工艺要求,产品切损率较高.为提高高强钢产品成材率,多采用U型冷却控制策略.U型冷却研发初期,数学模型不具备高强钢生产中多品种、多工艺的U冷设定需要及卷取温度控制不精确.结合生产中存在的难题,对卷取温度控制模型(coiling temperature control,CTC)进行升级,增加单钢种的设定功能,开发过渡段温度补偿功能,由此解决了高强钢头尾性能不合格等问题,实现了热轧高强双相钢高效、低成本生产.
Optimization and implementation of rolling process of high strength duplex steel for automobile
The cooling rate of the head and tail in the inner and outer rings is higher than that in the middle of the coil,and the performance of the head and tail cannot meet the technical requirements and the cutting rate of the product is higher.In order to improve the yield of high strength steel prod-ucts,U-shaped cooling control strategy is used.At the early stage of U-cooling research and develop-ment,the mathematical model did not meet the requirements of U-cooling setting for multi-varieties and multi-processes in high strength steel production,and the coiling temperature control was not ac-curate.According to the existing problems in production,the coiling temperature control(CTC)mod-el is upgraded,the setting function of single steel is added,and the temperature compensation func-tion of transition section is developed,which solves the problems such as unqualified performance of high strength steel head and tail,and realizes high efficiency and low cost production of hot rolled high strength duplex steel.
high strength steelU-coolingcoiling temperaturetemperature compensationmathematic model
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