在激冷铸铁凸轮轴生产过程中适当地加入孕育剂可以有效减小桃尖处白口深度。研究了稀土La对凸轮轴组织性能的影响。实验结果显示,稀土La能有效减小白口深度,提高铸件的力学性能;在轴颈部位碳化物≤15%的条件下,随着稀土La加入量的增加,形成石墨能力越来越强,石墨长度也增加,并且以A型石墨为主;同时,增加稀土La加入量能降低铁液激冷敏感性,不利于凸轮轴生产控制。 Appropriate addition of inoculant in chilled cast iron camshaft production process can effectively reduce the white point depth at the peach apex. The effect of rare earth La on the microstructure and properties of camshafts was studied. The experimental results show that rare earth La can effectively reduce the depth of the white mouth and improve the mechanical properties of the castings. With the addition of rare earth La (≤15%), the ability of forming graphite is more and more strong , Graphite length also increased, and A-type graphite-based; the same time, increase the amount of rare earth La can reduce the iron liquid cooling sensitivity is not conducive to the camshaft production control.