Equiaxial area in solidified nugget structure can be extended by incubating process,and the nugget with single equiaxial structure can be acquived under appropriate technologicalcondition.

• 通过孕育处理可扩大熔核凝固组织中的等轴晶区，并在合适的工艺条件下获得呈单一等轴晶组织的熔核。