本文介绍了在实际生产条件下球墨铸铁铸造余热正火工艺的研究。并借助添加微量合金元素Sb(0.013-0.016%)稳定了正火效果。经铸造余热正火的球墨铸铁S195柴油机曲轴,具有QT70-2以上的机械性能,良好的耐疲劳特性及断裂韧性。作者还介绍了成批投产85炉次4100根S195曲轴的良好效果,论证了该项技术的可行性及经济效益。 This article describes the actual production conditions ductile iron casting residual heat normalizing process. And with the addition of trace alloying elements Sb (0.013-0.016%) stabilized the normalizing effect. Cast afterheat normalized nodular cast iron S195 diesel engine crankshafts, with QT70-2 mechanical properties above, good fatigue resistance and fracture toughness. The author also introduced the batch production of 85 furnaces 4100 S195 crankshaft good effect, demonstrating the feasibility of the technology and economic benefits.