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我厂生产的镇静钢及合金钢,从1963年以来一直是采用炭黑浇注。根据长期的生产实践证明,无论在保温作用、覆盖情况,以及钢坯的表面和钢材的内部质量等方面都是比较好的。但是在保证质量的前提下,为了合理利用祖国的自然资源,节省其它工业的重要原料,降低钢的成本,我们曾进行过各种保护浇注代替炭黑的试验,均未得到满意的结果。由于柳毛石
Our factory production of killed steel and alloy steel, has been using carbon black casting since 1963. According to the long-term production practice, it shows that it is better in terms of heat preservation, coverage and the surface quality of billet and the internal quality of steel. However, under the premise of guaranteeing quality, we have conducted various tests to protect castings instead of carbon black in order to rationally utilize the natural resources of the motherland, save the important raw materials of other industries and reduce the cost of steel, and we are not satisfied with the results. Because of the willowstone