对亚共晶白口铸铁经高温形变后所获得的碳化物在等温球化过程中的球化行为进行了研究。分析认为 :碳化物是以大粒子吞食小粒子和短条状碳化物分断及棒端溶解自身球化的方式进行球化长大的 ,特点是碳化物尺寸逐渐增大 ,数目逐渐减少 ,其长大速度符合经验公式Vr=1 2 6 75× 10 - 3( 0 32 5 + 0 0 0 6 4τ) 2 ( μm/min) The balling behavior of carbides obtained during the isothermal spheroidization of hypoeutectic white cast iron after high temperature deformation was studied. The analysis shows that: carbide is a large particle swallowed small particles and short-strip carbide breaking and rod-end self-spheroidizing ball way to grow up, characterized by the gradual increase in the size of carbide, the number gradually decreased, and its long The large velocity conforms to the empirical formula Vr = 1 2 6 75 × 10 - 3 (0 32 5 + 0 0 0 6 4τ) 2 (μm / min)