这过程被称为完全退火，因为它去除了以前组织结构的所有痕迹、细化晶粒并软化金属。
This process is known as full annealing because it wipes out all trace of previous structure, refines the crystalline structure, and softens the metal.
高于此点，由于超过共析点钢完全由珠光体和退火状态的渗碳体组成，硬度增加并不多。
Above this point the hardness can be increased only slightly, because steels above the eutectoid point are made up entirely of pearlite and cementite in the annealed state.
如果把烧红的钢丝直接取出冷却，则退火不完全，钢丝硬度大，不易绕制弹簧。
If the red hot wire directly out of the cooling, the annealing is not complete, steel wire hardness, not easy to spring.
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