NS1402合金ESR 7.85t电极棒缩孔优化的数值模拟  

Numerical Simulation on Optimization of Shrinkage Cavity in ESR 7.85 t Electrode of Alloy NS1402

作　　者：谢鑫[1] 严波 曾建华[1] 王建[1] 吴国荣[1] 马晓涛[1] 龙木军[3] 

机构地区：[1]攀钢集团研究院有限公司,攀枝花617000 [2]攀钢集团长城特殊钢有限公司,江油621704 [3]重庆大学材料科学和工程学院,重庆400044

出　　处：《特殊钢》2017年第3期1-4,共4页Special Steel

摘　　要：NS1402合金(/%:0.01C,0.15Si,0.34Mn,0.004P,0.004S,22.33Cr,40.07Ni,3.22Mo,2.29Cu,0.87Ti,0.11Al,30.6Fe)7.85 t电渣重熔用40 t EAF+VOD冶炼的电极棒凝固收缩过程中容易产生严重的缩孔缺陷。借助商业软件CAD,GEOMESH和MeshCAST,建立了该电极棒的充型和凝固模型,得出模拟中心缩孔直径为248 mm,与实测值比较,相对误差为4.6%。结果表明,将电极棒倒置可以减小缩孔直径32.2%;随着绝热板长度的增加,缩孔减轻,将绝热板长度增加200 mm,可以基本消除冒口下的缩孔。The serious shrinkage cavity defect in 7. 85 t electrode of alloy NS1402 （/% ： 0. 01C, 0. 15Si, 0. 34Mn, 0. 004P, 0. 004S, 22.33Cr, 40. 07Ni, 3.22Mo, 2. 29Cu, 0. 87Ti, 0. llA1, 30. 6Fe） melted by 40 t EAF ＋ VOD for ESR forms easily in solidification process. By using commercial software CAD, GEOMESH and MeshCAST a model of the elec- trode filling and solidifying has been established to get the simulated diameter of center shrinkage cavity being 248 mm, as compared with measured value the relative error is 4. 6%. Results show that as the electrode is located upside down, the diameter of shrinkage cavity decreases by 32. 2% ; with increasing the length of insulation board the shrinkage cavity re- duces, and with increasing the length of insulation board by 200 mm, the shrinkage cavity below hot top is basically elimi- nated.

关 键 词：NS1402合金 7.85 t电极棒 缩孔 数值模拟 优化 

分 类 号：TG132.3[一般工业技术—材料科学与工程] TG244[金属学及工艺—合金]