某些杂质对于铁碳合金的物理性能和机械性能特别是塑性有坏作用,这在一些文献中已经阐述过了。这些杂质具有高的表面活性,最后结晶,分布在晶界或树枝晶轴间,使合金脆化。显然要抑制杂质的有害影响,首先必须改变这些杂质析出物的形状和分布情况,即对金属熔液进行变质处理。但对变质剂和杂质之间的相互作用机理的研究还不充分,仍需做进一步的实验研究。已知具有高表面活性的元素能从而阻止表面活性稍差的其它元素在晶界上的偏析使晶界活化,有些资料中阐述这种效果是变质剂对晶界吸附作用的影响而引起的。因此,可能借助于在变质剂组分中 Some of the impurities have a bad effect on the physical properties and mechanical properties of iron-carbon alloys, especially plasticity, which has been described in some documents. These impurities have high surface activity, the final crystallization, distributed in the grain boundary or dendrite axis, the alloy embrittlement. Obviously to inhibit the harmful effects of impurities, we must first change the shape and distribution of these impurity precipitates, that is, the metal melt metamorphism. However, the research on the mechanism of interaction between modifiers and impurities is still not enough, and further experimental studies are still needed. Segregation of the other elements with slightly poor surface activity on the grain boundaries is known to activate the grain boundaries, as some of the data suggest that this effect is caused by the effect of the modifier on the adsorption of the grain boundaries. Therefore, it is possible to resort to the modifier component