复合粉剂包芯线应用研究  

Study on application of composite powder cored wire

作　　者：康伟 栗红 曹东 常桂华 廖相巍 KANG Wei;LI Hong;CAO Dong;CHANG Guihua;LIAO Xiangwei(Key Laboratory of Metal Materials for Marine Equipment and Application,Anshan 114009,China;Steelmaking Department of Ansteel Group Iron and Steel Research Institute,Anshan 114009,China)

机构地区：[1]海洋装备金属材料及应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团钢铁研究院炼钢技术研究所,辽宁鞍山114009

出　　处：《炼钢》2022年第2期36-42,共7页Steelmaking

摘　　要：将制备的Fe-Si+CaO复合粉剂包芯线加入钢液,研究其对去除夹杂物的作用。结果表明:复合粉剂包芯线能够加入到钢液,其中粉剂可以扩散分布到钢液中,与钢液中夹杂物形成硅钙铝复合夹杂物,外观呈球形,容易聚集上浮排出钢液。工业应用中,复合粉剂包芯线在不影响钢种成分控制的情况下,能够起到去除夹杂物、净化钢液的作用,应用复合粉剂的罐次铸坯T.O含量、夹杂物面积分数、夹杂物数密度显著下降,残留在铸坯中的夹杂物尺寸绝大多数小于4μm,未出现大于10μm夹杂物。Fe-Si+CaO composite powder cored wire was added into molten steel,and its effect on the removing inclusions was studied.The results show that the composite powder cored wire can be added into molten steel,in which the composite powder can diffuse into molten steel and form Si-Ca-Al composite inclusions with the inclusions in molten steel.The appearance of composite inclusions is spherical,which is easy to accumulate and float up.The industrial trial results show that,the composite powder cored wire can remove inclusions and purify molten steel without affecting the control of steel composition.The T.O content,area content and number density of inclusions are decreased significantly,and the sizes of inclusions remaining in the slab are mostly less than 4μm,and no size larger than 10μm inclusions.

关 键 词：复合粉剂包芯线 钢液纯净化 去夹杂 复合夹杂物 

分 类 号：TF703.5[冶金工程—钢铁冶金]