用掺杂法将微量的碱土金属元素Ba、Ca、Mg掺入钼中,按通常的工艺制度加工,研究了Ba、Ca、Mg对其晶粒长大行为的影响。结果表明:在一定的温度下,掺杂元素有明显的抑制晶粒正常长大的作用,其平均晶粒度远较纯钼的小,温度上升到2050℃以后,掺杂元素又反过来促进晶粒的异常长大,并有“岛状晶粒”出现,个别晶粒粗化,最大晶粒达50mm。 Adulteration of trace amounts of alkaline earth elements Ba, Ca and Mg into molybdenum by doping method was studied. The effects of Ba, Ca and Mg on the grain growth behavior were investigated by the conventional process. The results show that at a certain temperature, the doping element obviously inhibits the normal growth of grains and the average grain size is much smaller than that of pure molybdenum. After the temperature rises to 2050 ° C, the doping elements in turn promote Abnormal growth of the grain, and the “island-shaped grains” appear, the individual grain coarsening, the largest grain up to 50mm.