介绍了大连机车车辆工厂30多年来对240柴油机球铁曲轴从选材、设计、计算、表面强化处理以及试验等方面进行的开发成果。用断裂力学分析等方法对球铁曲轴的耐久可靠性进行评估与寿命预测,制定了相应的验收技术条件,使钼铜合金球铁曲轴成功的用于16240ZJ柴油机。还论述了该型曲轴用于更大功率柴油机的可能性。 The development achievements of 240 diesel ductile iron crankshafts from material selection, design, calculation, surface strengthening treatment and test were introduced in Dalian Locomotive and Rolling Stock Plant for more than 30 years. Fracture mechanics analysis and other methods to ductile iron crankshaft durability reliability assessment and life prediction, developed the corresponding acceptance of technical conditions, the molybdenum-copper alloy ductile iron crankshaft for the successful use of 16240ZJ diesel engine. The possibility of using this type of crankshaft for more powerful diesel engines is also discussed.