依据作者关于钢中奥氏体晶粒尺寸影响相变产物中碳化物形态的观点， 本文分析研究了精轧过程中与碳化物球化有关的金属学问题； 指出在临界温度以下对过冷奥氏体实施精轧， 因铁素体“超量”析出而使奥氏体晶粒细化， 并随精轧形变量的增加， 在晶内诱发共析相变； 精轧后的钢继续在精轧温度短时停留， 可实现碳化物相的优良球化。 According to the author’s view that the austenite grain size in steel affects the morphology of carbides in the phase transformation product, this paper analyzes and studies the metallurgy problems related to the carbide spheroidization during the finish rolling. In the finish rolling of the austenite, the austenite grains are refined due to the “excessive” precipitation of the ferrite, and the eutectoid transformation is induced in the crystal as the amount of the finish rolling deformation increases. The finish rolled steel continues Short rolling finishing temperature, carbide phase can be achieved excellent ball.