含钇E36船板钢夹杂物改性

为了研究钇对E36船板钢中夹杂物成分和形貌的影响,对钇处理后E36船板钢中典型夹杂物进行热力学计算,并通过扫描电镜及能谱仪对钇处理前后E36船板钢中夹杂物进行检测分析,观察典型夹杂物形态和尺寸。结果表明,未添加稀土钇的E36船板钢主要为长条状MnS夹杂物;添加稀土钇后,钢中夹杂物主要为球状或类球状的含钇复合夹杂物。当钢中钇质量分数为0.007 8%时,夹杂物主要为球状或类球状的Y₂O₂S夹杂物和Y₂O₃夹杂物;当钢中钇质量分数增加至0.037 7%时,夹杂物改性为球状或类球状Y₂O₂S夹杂物、YS夹杂物和Y₂O₃夹杂物。

Inclusion modification of E36 shipbuilding steel containing yttrium

In order to study the effect of yttrium on the composition and morphology of inclusions in E36 shipbuilding steel, the thermodynamic calculation of the main inclusions in E36 shipbuilding steel after adding rare earth yttrium was firstly carried out. And the inclusions in E36 shipbuilding steel before and after yttrium treatment were analyzed by scanning electron microscopy and energy spectrum. The results showed that the inclusions in E36 shipbuilding steel without rare earth yttrium were mainly chain-type MnS inclusions. After the addition of yttrium, the inclusions in E36 shipbuilding steel were mainly spherical or spheroidal composite inclusions containing yttrium. When the mass fraction of yttrium in the steel was 0.007 8%, the inclusions were mainly spherical or spheroidal Y₂O₂S and Y₂O₃ inclusions. When the mass fraction of yttrium in the steel reached 0.037 7%, the inclusions were mainly spherical or spheroidal Y₂O₂S, YS and Y₂O₃ inclusions.