发热保温冒口套在特种焊丝用钢907A模铸中的应用研究  

Research and Application of Exothermic Insulated Riser in Mold Casting of Special Welding Steel 907A

作　　者：成建强 张靖 顾晔 胡显军 王雷 CHENG Jian-qiang;ZHANG Jing;GU Ye;HU Xian-jun;WANG Lei(Jiangsu Shagang Iron and Steel Research Institute Co.,Ltd.,Zhangjiagang 215625,Jiangsu,China)

机构地区：[1]江苏省沙钢钢铁研究院有限公司,江苏张家港215625

出　　处：《铸造》2024年第1期49-52,共4页Foundry

摘　　要：针对特种焊丝用钢907A模铸用发热保温冒口的材质进行改良设计,并对冒口内不同位置钢液的温降进行数值模拟。结果显示,钢温从1580℃降至1522℃需要约41 min。将该材质的发热保温冒口套用于9炉907A钢的真空熔铸试验,浇注温度1640~1650℃,浇注速度375~400 kg/min,切除冒口后,铸锭锭身无二次缩孔,有效提高铸锭成材率;将铸锭冒口成分与浇注前钢液成分对比,未发现冒口套在使用过程中,会对合金成分和气体含量产生不利影响。After the improving design of components and overall dimensions of exothermic insulated riser for special welding steel 907A is finished,temperature dropping simulation for liquid melt in different places in the riser had been carried out.The results show that it takes about 41 min for the steel melttemperature to drop from 1580℃to 1522℃.The exothermic insulated riser sleeve of the material was used in the vacuum melting casting test of 907A steel in 9 furnaces.The pouring temperature was 1640-1650℃and the pouring speed was 375-400 kg/min.After the riser was removed,there was no secondary shrinkagein the ingot body,which effectively improved the yield of ingot.Comparing the composition of riser with that of molten steel before pouring,it is not found that riser sleeve will have adverse effects on alloy composition and gas content during use.

关 键 词：发热保温冒口 907A钢 真空熔铸 二次缩孔 

分 类 号：TG244.4[金属学及工艺—铸造]