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沸腾钢是一种生产简便、成本低廉、用途较广的普通低碳钢。它具有良好的表面质量和较高的金属收得率,但钢锭内部,尤其是头部存在着严重的偏析,因而往往造成钢材机械性能相差悬殊及中心疏松、分层等缺陷,以致于用户不得不分段使用。为了改善沸腾钢的内部质量,国内外对此进行了大量研究,机械封顶和化学封顶就是这一研究的重要成果。我厂于1965年初正式采用瓶式模进行机械封顶,钢锭头部偏析比敞口模有所改善,但是头部偏析和中心疏松仍然很严重,而且压盖穿冒钢的问题一直未能解决,给生产工艺和劳动条件带来一定困难。为了
Boiling steel is a kind of ordinary low-carbon steel with simple production, low cost and wide application. It has a good surface quality and high metal yield, but the ingot ingot, especially the head there is a serious segregation, which often results in a great disparity in the mechanical properties of steel and the center loose, delamination and other defects, so that the user may not Not segmented use. In order to improve the internal quality of boiling steel, a great deal of research has been carried out at home and abroad. The mechanical capping and chemical capping are the important achievements of this research. I plant in the early 1965 the formal adoption of the bottle-shaped die for mechanical capping, head segregation of the ingot has improved than the open die, but the head segregation and loose center is still very serious, and gland wearing steel problem has not been solved, To the production process and working conditions bring some difficulties. in order to