The eutectoid compounds are very slow in forming .

共析物的形成是非常缓慢的。

The eutectoid reactions which can occur are extremely sluggish .

可能发生的共折反应是非常缓慢的。

The results indicated that the irreversible structure change could lead to higher supercooling degree during solidification , and the primary phase and eutectoid phase became finer and more dispersive .

结果表明，不可逆熔体结构的变化导致熔体凝固所需的过冷度增大，合金凝固组织变化明显，初生相和共析组织细化，分布弥散化。