By controlling knock-out time, bainite structure was obtained in the as-cast low-carbon ductile iron cast with EPC process.
采用消失模铸造工艺，经准铸态贝氏体工艺处理后，得到了贝氏体组织。
Test results show that non-metallic inclusion and bainite structure in the steel are main factors affecting the elongation.
试验结果表明：钢中非金属夹杂物和贝氏体组织是影响伸长率的主要因素。
It shows that even granular bainite structure can be obtained in the condition of air quenching. The temper resistance is better and comprehensive mechanical properties of the steel are higher.
试验结果表明，该钢在空冷条件下可获得均匀的粒状贝氏体组织，具有良好的耐回火性和较高综合力学性能。
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