本文研究了12V175ZL 型柴油机球铁曲轴轴颈与曲柄臂过渡圆角处采用滚压强化以提高其抗弯疲劳强度。对四种不同材料不同工艺的曲轴单拐进行了对比试验,认为圆角滚压强化工艺是提高球铁曲轴承载能力既经济又有效的方法。目前,该工艺已得到实际应用并取得了良好的效果,它能使曲轴的弯曲疲劳强度提高67%,安全系数达到2.5左右。 This paper studies the 12V175ZL-type diesel engine ductile iron crankshaft crank and the transition corner fillet reinforcement to improve the flexural fatigue strength. The crankshaft single crankshafts of four different materials and different technologies were contrasted. It is considered that the round-rolling process is an economical and effective way to improve the bearing capacity of the ductile iron crankshaft. At present, the process has been practical application and achieved good results, it can make crankshaft bending fatigue strength increased by 67%, the safety factor of 2.5 or so.