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
赵烁 1薛余强 2朱仕彬 2王建锋 2孙晓林 3宋高阳1
作者信息
- 1. 河北工程大学材料科学与工程学院,河北邯郸 056000;河北省高品质冷镦钢技术创新中心,河北邯郸 056000
- 2. 河北工程大学材料科学与工程学院,河北邯郸 056000
- 3. 河北工程大学材料科学与工程学院,河北邯郸 056000;河北省高校高端紧固件全流程应用工程中心,河北邯郸 056000
- 折叠
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50 μm、50～100μm和100～150 μm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50 μm,尺寸不大于50 μm、50～100μm和100～150 μm夹杂物去除率增加比例分别为4.58％、3.01％和 2.42％.
Abstract
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 satis-fied 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 ≤ 50 μm,50-100 μm and 100-150 μm 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 50 μm,the removal rate of inclusions ≤50 μm,50-100 μm and 100-150 μm 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Key words
composite cored wire/melting characteristics/feeding wire parameter/inclusion/removal ratio引用本文复制引用
出版年
2024
NETL
NSTL
万方数据