不锈钢软接触电磁连铸的工业试验  

Industrial application of stainless steel soft-contacting electromagnetic continuous casting

作　　者：侯晓光[1,2] 王恩刚[1] 张永杰[2] 许秀杰[1] 邓安元[1] 

机构地区：[1]东北大学电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]宝山钢铁股份有限公司研究院,上海201900

出　　处：《钢铁》2015年第11期45-52,共8页Iron and Steel

基　　金：国家自然科学基金资助项目(50834009;51474065);教育部重大科技项目资助项目(311014);高等学校学科创新引智计划资助项目(B07015)

摘　　要：通过分析碳钢和不锈钢材质的电阻率差异性,以及304不锈钢软接触电磁连铸的中试试验结果,证实了不锈钢软接触电磁连铸的可行性。进而,在商业级规模铸机上分别开发了不锈钢圆坯和方坯软接触电磁连铸系统,进行了不同钢种、不同保护渣条件下的相关工业生产试验。结果表明,不锈钢圆坯和方坯软接触电磁连铸在不超过150 k W的电源输出功率条件下,均能获得较佳的振痕去除效果,改善铸坯表面质量。对获得的铸坯进行免修磨轧制成?8 mm线材,并经过固溶热处理以及酸洗等工序,使线材成品的综合成材率提高3%以上。多次生产试验采用不间断连浇方式,期间,软接触电磁连铸设备系统生产稳定可靠,未发现液面异常波动以及铸坯低倍组织卷渣等缺陷,使软接触电磁连铸技术向商业化生产运营迈出了关键一步。最后,讨论了软接触电磁连铸技术拓展至不锈钢板坯断面的可行性。The technology of soft-contacting electromagnetic continuous casting （SCEMCC） had been developed for sev- eral decades. However, it still needs to find a right point for commercial applications, throug analyzing the different of re- sistivity characteristics between stainless steel and carbon steels, and the pilot experimental results of 304 round billet SCEMCC, the feasibility of stainless steel SCEMCC was confirmed. Then, the new systems of round billet and square bil- let SCEMCC were developed respectively for industrial production experiments with different stainless steel grades and mold flux powders. The industrial production experimental result shows that the SCEMCC systems were effective and reli- able to reduce the depth of almost all billet oscillation marks from about 0.7 mm to near zero, under the condition of 150 kW output power to the electromagnetic casting mold. Using obtained SCEMCC billets for milling φ 8 mm steel wire rod products, then processing with solution heat treatment and acid pickling, the material yield of end wire rod products can be increased more than 3%. Many times industrial continuous casting production experiments, in which the phcnomenas of meniscus abnormal fluctuation and slag entrapped defects of billet macro structure were not being found, promoted SCEMCC taking a key step on business operation. Finally, the feasibility of SCEMCC from the billet section expending to the slab was discussed.

关 键 词：软接触电磁连铸 不锈钢 振痕 电磁连铸 

分 类 号：TF764.1[冶金工程—钢铁冶金]