包钢6~#铸机240 mm×240 mm断面铸坯质量研究

Study on Quality of Casting Blank with 240 mm × 240 mm Section Produced with 6~# Casting Machine of Baotou Steel

文章对包钢6^#铸机预留的240mm×240mm断面进行调试,主要对铸机结晶器电磁搅拌、末端电磁搅拌、二冷水以及喷嘴型式、喷嘴水压等技术参数进行调控。调试期间,生产了Q195、Q235、45#、SWRH82B等低、中、高碳三大类钢种,铸坯表面没有发现结疤、裂纹;通过硫印、低倍检验0、1级比率达到94%,铸坯质量控制较好,能够满足轧钢厂轧制需求。

In this paper, it is introducrd the pre-remained 240 mm×240 mm section for 6^# casting machine of Baotou Steel is commissioned as well as such technical parameters as the electromagnetic stirring of crystallizer of casting machine, final electromagnetic stirring, secondary cooling water, nozzle type and water pressure of nozzle are mainly regulated and controlled. During the commissioning period, the low, medium and high carbon steels such as Q195, Q235, 45^# and SWRH82B were produced as well as the scab and cracks were not found on the surface of casting blank. The ratio of grades of 0 and 1 could reach 94% by sulphur print and macroscopic examination, so the quality control of casting blank is good and can meet rolling demand of Steel Rolling Plant.