【摘要】 从2个浸入式浇口同时浇注Sn和Sn+Pb2种金属液,通过在结晶器外侧施加直流电磁场,控制结晶器内金属液的混流,得到了Sn和Sn+Pb复层铸坯。数值模拟的结果表明,电磁力在结晶器一定高度范围内对速度v起作用,且在不同的高度,磁场对速度v的制约也是不同的;当B=0.2T左右时,浇道出口速度可以很快地减小,使射流程度降低,达到理想的制动效果。因此,磁感应强度值应大于0.2T。更多还原

【Abstract】 In order to obtain dual metal slab,mi xing flow of molten metals in a mold wa s controlled by imposing a static ele ctromagnetic field from the outside of the mold,and the d ual metal slab which has different pr operties in its two sides was continu ally cast by pouring two dif-ferent molten alloys,Sn and Sn +Pb,a t the same time.The results of numerical simulation show that electromag netic force acts on flow of melt in a certain height range of the mold,and the effect of magnetic field on the flow of the melt is different at different area of the mold;When magnetic flux density B is 0.2T,the flow of the melt at exit of the nozzle is strongly suppressed,d epth of jet is decreased,so when B is more than 0.2T,ideal brake effect is achieved.更多还原