承钢硬线钢的生产及工艺优化

Production and Technology Improvement of Hard Wire Steel in Chengde Steel

针对承钢半钢炼钢的特点,在现有条件下开发出硬线钢的生产工艺流程,并通过采取冶炼造双渣操作、无铝脱氧、使用低氮增碳剂、LF炉精炼、连铸保护浇注及电磁搅拌等措施进行工艺优化,提高了钢水可浇性,降低了钢中气体含量及夹杂物含量,提高了铸坯内部质量,使成品性能和质量达到了硬线钢的要求,满足了用户对产品的需要。

In view of the characteristics of steelmaking with semi-steel,Chengde Steel developed the process of producing hard wire steel under the existing conditions and took effective measures to carry out the technology improvement.The measures mainly include adopting the double-slag operation,non-aluminum deoxidation,low nitrogen carburant in smelt process,LF furnace refining,the protection of pouring and EMS.Then it increased the liquidity of molten steel,reduced the gas and impurity contents of steel,and improved the internal quality of the slab,so that the performance and quality of the product reached the conditions of hard wire steel and met the needs of users.