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我厂采用敞口式钢锭模生产的沸腾钢,在轧制薄板时产生大量分层(夹杂)缺陷,例如高磷板钢(B_2FP)夹杂废品率竟达5～10%。从1964年6月起先后试验采用波纹形钢锭模、半镇静钢及瓶口式钢锭模机械封顶等新工艺生产高磷板钢代替一般沸腾钢,结果表明,瓶口式钢锭模机械封顶的效果最好,一年来的生产实践结果是:夹杂废品率大幅度下降,比敞口模
The boiling steel produced by the open-cast steel ingot mold in our factory produces a lot of delaminations (inclusions) when the steel sheet is rolled. For example, the rejection rate of the high-phosphorus steel plate (B_2FP) is 5 to 10%. From June 1964 onwards, we experimented with corrugated ingot molds, semi-killed steel and bottleneck steel ingot mold mechanical capping to produce high-phosphorus plate steel instead of normal boiled steel. The results show that the effect of bottleneck ingot mold mechanical capping Best, the results of the production practice over the past year is: a substantial decline in the rate of mixed waste than the open mold