摘要
针对超级双相不锈钢的传统铸造方法易出现漏钢、漏渣、表面成型差等问题,采用抽锭电渣重熔处理,通过改变重熔过程中的供电制度、冷速条件、液固界面位置等因素,对船用脱硫塔大直径板坯进行技术设计,分析了坯锭的内部凝固质量和表面状态。结果表明:重熔过程增大了钢—渣界面积,起到渣洗的作用,使得重熔的钢纯度高、非金属夹杂物少,满足了生产要求。在重熔铸坯的成型过程中,最合适的工艺参数是抽锭速度由1.5 mm/min缓慢增加到12 mm/min,炉顶电压为62 V,二级电流维持在19 kA,电极熔化速度在1100~1200 kg/h。得到的坯锭分布均匀,并且表面质量良好,无夹渣、重皮等缺陷,表面修磨量小于3mm,可进行后续轧机轧制等工序。
In view of the problems of steel leakage,slag leakage and poor surface forming in the traditional casting method of super duplex stainless steel,the internal solidification quality and surface state of the ingot were analyzed by changing the power supply system,cooling speed conditions,liquid-solid interface position and other factors in the remelting process.The results show that the remelting process increases the steel-slag boundary area and plays the role of slag washing,so that the remelted steel has high purity and few non-metallic inclusions,which meets the production requirements.In the forming process of remelting the billet,the most suitable process parameters are that the ingot pumping speed is slowly increased from 1.5mm/min to 12mm/min.The top voltage of the furnace is 62V.The secondary current is maintained at 19kA,and the electrode melting speed is in the range of 1100~1200 kg/h.The obtained billet ingots are evenly distributed,and the surface quality is good.There are no defects such as slag inclusion and heavy skin,and the surface grinding amount is less than 3mm,which can be used for subsequent rolling mill rolling and other processes.
作者
王容
何志军
李珂
李晓波
Wang Rong;He Zhijun;Li Ke;Li Xiaobo(Shanghai Marine Diesel Engine Research Institute,Shanghai 201100,China)
出处
《绿色科技》
2024年第8期276-280,共5页
Journal of Green Science and Technology
关键词
抽锭电渣重熔
温度控制
渣系配比
electroslag remelting of ingots
temperature control
slag system ratio
