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针对高强钢代表产品如低合金高强钢、双相钢、加磷高强钢等的钢种特点,从实际生产出发,分别确定板坯加热制度。研究表明,通过限制板坯在炉总时间和高温段停留时间,可提高低合金高强钢的性能稳定性;通过氧化铁皮XRD分析、SEM观察,结合SiO_2-FeO二元相图,确定氧化铁皮压入的原因,采用提高板坯加热温度来保证炉后除鳞温度可以解决高硅质量分数双相钢的氧化铁皮压入问题;通过提高板坯加热温度来提高精轧入口温度,降低轧制速度,可缓解加磷高强钢薄规格产品头部轧烂和堆钢风险高的问题。
According to the characteristics of high strength steel products such as low alloy high strength steel, dual phase steel, high strength and high phosphorus steel, starting from the actual production, respectively, to determine the slab heating system. The results show that the stability of low-alloy high-strength steel can be improved by limiting the total time and the residence time of slab in the furnace. By the XRD and SEM observation of oxide scale and the binary phase diagram of SiO 2 -FeO, Into the reasons, the use of increased slab heating temperature to ensure after descaling furnace can solve the problem of high silicon content of dual-phase steel oxide skin pressing into; by increasing the slab heating temperature to improve the finish rolling inlet temperature and reduce the rolling speed , Can alleviate the problem of high-strength high-strength steel thin specifications of the head of the bad rolling and pile of steel.