高铝钢液中喂入复合包芯线的熔化行为与夹杂物去除模拟  

Simulation of melting and inclusion removal behaviors of molten high-Al steel fed with composite cored wire

作　　者：赵烁 薛余强 朱仕彬 王建锋 孙晓林 宋高阳 ZHAO Shuo;XUE Yuqiang;ZHU Shibin;WANG Jianfeng;SUN Xiaolin;SONG Gaoyang(College of Materials Science and Engineering,Hebei University of Engineering,Handan 056000,Hebei,China;Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province,Handan 056000,Hebei,China;Whole Processes of High Quality Fastener Application Technology Research Center of Universities in Hebei Province,Handan 056000,Hebei,China)

机构地区：[1]河北工程大学材料科学与工程学院,河北邯郸056000 [2]河北省高品质冷镦钢技术创新中心,河北邯郸056000 [3]河北省高校高端紧固件全流程应用工程中心,河北邯郸056000

出　　处：《连铸》2024年第5期54-62,共9页Continuous Casting

基　　金：国家自然科学基金资助项目(51904086);中央引导地方科技发展资金资助项目(226Z1015G);河北省引进国外智力资助项目。

摘　　要：为了解决高铝钢喂钙线技术的金属收得率低、夹杂物改性不充分等问题,采用钢液喂入复合钙铝酸盐包芯线技术,利用数值模拟和水模型试验方法研究不同直径复合包芯线在钢液中的熔化行为,以及喂入包芯线后对钢液流场和夹杂物去除率的影响。结果表明,包芯粉直径为11 mm、线皮厚度为1.07 mm的复合包芯线,满足喂线速度为2~4 m/s的理想条件。当喂入深度为100~300 mm时,尺寸不大于50μm、50~100μm和100~150μm夹杂物去除率的增加比例分别为3.29%、2.71%和2.56%。当喂入深度距离钢包底部100 mm时,复合包芯粉尺寸每增加50μm,尺寸不大于50μm、50~100μm和100~150μm夹杂物去除率增加比例分别为4.58%、3.01%和2.42%。In order to solve the problems of low metal yield rate and insufficient modification of inclusions in high Al steel with traditional feeding calcium wire technology,feeding composite calcium aluminate cored wire was fed into molten steel.The melting behavior of composite cored wires with different diameters in molten steel as well as the effect of feeding cored wire on the flow field of molten steel and the removal ratio of inclusions were studied by the numerical simulation and water model test methods.The numerical simulation results of the cored wire melting showed that the composite cored wire with a core powder diameter of 11 mm and a skin thickness of 1.07 mm satisfied the ideal condition for feeding speed of 2-4 m/s.The water model experiment results of feeding composite cored wire showed that when the feeding depth was 100-300 mm,the removal ratio of inclusions≤50μm,50-100μm and 100-150μm increased by 3.29%,2.71%and 2.56%,respectively.When the feeding depth was 100 mm from the bottom of the ladle,with the composite core powder size increasing per 50μm,the removal rate of inclusions≤50μm,50-100μm and 100-150μm increased by 4.58%,3.01%and 2.42%.

关 键 词：复合包芯线 熔化特性 喂线参数 夹杂物 去除率 

分 类 号：TF703[冶金工程—钢铁冶金]