利用不同加入量的稀土-硅-镁对高碳高铬铸钢进行变质处理,分析不同变质剂用量对其组织的影响,并分析影响原因。结果表明,变质处理不仅可以细化基体组织,还可以使碳化物的形态发生变化;在一定范围内,随着变质剂用量的不断增加,基体组织的细化程度有增加的趋势,同时网状碳化物断开程度也不断增加。但是当变质剂含量增加到0.05%以后,继续增加时,变化很小。 Using different amounts of rare earth - silicon - magnesium high carbon and high chromium cast steel metamorphic treatment, analysis of the effect of different modifier dosage on the organization, and analyze the causes. The results show that the metamorphic treatment not only can refine the matrix structure but also change the morphology of the carbide. In a certain range, with the increasing of the amount of modifier, the refinement of the matrix structure tends to increase, The degree of carbides is also increasing. However, when the modifier content increased to 0.05%, continue to increase, the change is small.