本文概述了武汉钢铁公司半镇静钢生产的品种、工艺、质量及使用效果。根据大量的生产研究,认为半镇静钢随着[Si]含量的提高,钢坯切头率增加,B_5b半镇静钢的适宜硅含量,应控制在0.07％以下。提高浇注速度,有利于防止模内结膜翻皮,避免引起钢锭头部“夹渣”。对半镇静钢的表面和内部质量,进行了生产对比试验,认为因疏松引起的钢坯断面“空洞”,可以少切或不切,以便合理提高钢坯收得率。 This article summarizes the varieties, techniques, qualities and effects of semi-killed steel produced by Wuhan Iron and Steel Company. According to a large number of production studies, it is considered that with the increase of [Si] content, the billet cutting rate increases, and the suitable silicon content of B5b semi-killed steel should be controlled below 0.07%. Improve the casting speed, help prevent mold conjunctiva over the skin, to avoid causing the ingot head “slag”. The semi-killed steel surface and internal quality, the production of comparative tests, that caused by the slab section caused by porosity “hole”, you can cut less or not, so as to reasonably improve the billet yield.