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一、绪言在我国,连续铸钢从试验研究到计入生产能力已有二十余年。这期间,在减少拉漏提高铸机生产率、减少废品提高钢质、扩大浇注钢种及改进设备等诸方面做了不少工作,取得了成绩。当然,为了进一步提高生产水平,还应该力争消除至今尚存在着的某些差距。例如,连铸坯轧成的钢板其塑性往往不如钢锭轧制的;又如,3~#钢铸坯纵裂纹率在使用潜入式水口保护渣浇注以后,虽有大幅度降低,但至今仍然是连铸坯的主要缺陷,有待于进一步克服;还有非金属夹杂物的偏折造成的钢板缺陷也是不容忽视的,如此等等。
First, the introduction In our country, continuous casting steel from the experimental study into account for more than 20 years of production capacity. In the meantime, a lot of work has been done on reducing the leakage rate, improving the productivity of the caster, reducing the amount of steel scrap, increasing the amount of pouring steel and improving equipment, and achieved good results. Of course, in order to further raise the level of production, we should strive to eliminate some of the gaps that still exist. For example, the continuous casting slab rolled steel is often less plastic than steel ingot rolling; another example, 3 ~ # steel slab vertical crack rate in the use of submerged nozzle mold flux pouring, although significantly reduced, but still is The main defects of slab, to be further overcome; there are non-metallic inclusions deflection caused by the steel defects can not be ignored, and so on.