在试验温度为650℃的情况下,对原始材料组织为层片状高碳珠光体的T8钢进行等通道角多道次挤压变形,同时根据AFM、TEM和SEM表征了材料在挤压变形过程中其渗碳体片层的组织演变过程。结果表明,层片状渗碳体有较强的塑性变形性能,通过产生扭折、断裂及弯曲等方式来缓和塑性变形所带来的剧烈影响;从二维角度观察到的变形过程及结果与从三维立体角度观察的相吻合。 At the test temperature of 650 ℃, the T8 steel with lamellar high-carbon pearlite was the primary material with multipass pass deformation at the same channel angle. Meanwhile, the deformation of the material was characterized by AFM, TEM and SEM, The process of its cementite lamellae evolved. The results show that the lamellar cementite has strong plastic deformation properties, which can mitigate the severe effect of plastic deformation through kinking, fracture and bending. The deformation process and the results from two-dimensional Observed from the perspective of three-dimensional match.