作　　者： ; ; ; ;

机构地区： 东北大学材料与冶金学院

出　　处： 《特种铸造及有色合金》 2008年第S1期368-371,共4页

摘　　要： 采用试验与数值模拟相结合的方法,对波浪型倾斜板振动作用下金属熔体在斜板表面的传热与传质进行了研究。结果表明,在波浪型倾斜板振动过程中,熔体在斜板表面宏观上沿斜板表面法向散热,合金等温线从靠近斜板侧向靠近空气侧逐渐向下偏移。微观熔体质点在斜板表面沿各个方向散热均匀,这种动态传热规律促进了爆发形核,为细小球形晶的形成提供了重要前提条件。振动与金属流动大大提高了溶质扩散系数,加速溶质在液相中扩散,使熔体内部成分场均匀,为晶粒爆发形核和保持球状生长提供了重要条件。 Heat and mass transfers during the Vibrating Wavelike Sloping Plate process (VWSP) were studied by the methods of numerical simulation and experiment. The results show that during the VWSP process, the heat of the melt diffuses along the normal line to the sloping plate surface in the macroscopic scale, and the isothermal line gradually deviates from the sloping plate surface to the interface between the melt and the air. Micro mass point dissipates heat homogenously along very directions on the surface, wh...

关 键 词： 波浪型倾斜板 半固态 传热 传质 组织

领　　域： [金属学及工艺]