稀土在低硫钢中的作用规律

Behaviour of Rare Earth in Low-Sulphur Steel

研究了稀土对低硫（S＜0．005%）钢性能和组织的影响，研究结果表明，稀土元素的加人可大大改善钢的冲击韧性，而不影响钢的组织类型，但可使钢中铁素体数量增加，珠光体数量减少，晶粒度级别略有提高。

This paper presents study, on the effect of rare earth on the properties and structuresof low -- sulphur steel. The result shows that impact. toughness of steel can be greatly improved byadding rare earth. Rare earth does not affect the structures of steel, but it can increase the feniteamount and reduce the pearlite magnitude as well as improve slightly the grain size level.