为了配合农业生产大跃进,支援农业机械化,我厂接受了大量生产柴油机任务,按原有柴油机的曲轴设计为45锻件,每件自由锻毛胚重达90,不仅需用三吨的锻锤,更困难的是须要巨量的钢材和耗费巨大的加工量,还可能严重的影响任务的完成,因此考虑必需用铸造方法来代替。 45和球墨铸铁的性能比较如表一所示,而球墨铸铁对于抗磨,减震,缺口敏感性等 In order to support the great leap forward in agricultural production and to support the mechanization of agriculture, our factory has accepted the task of mass production of diesel engines. According to the crankshaft design of the original diesel engine, 45 forgings are designed. Each of the free forging embryos wears weighs 90. Not only three- More difficult to require a huge amount of steel and the huge amount of processing, but also may seriously affect the completion of the task, so consider the casting method must be replaced. 45 and ductile iron performance comparison as shown in Table 1, and ductile iron for anti-wear, shock absorption, notch sensitivity, etc.