国内外电渣重熔H13钢中夹杂物的对比

为了找出国产电渣重熔H13钢在夹杂物控制方面存在的不足，采用扫描电镜(SEM)、能谱仪(EDS)和夹杂物自动分析系统(INCA Steel)对国内外不同产地的电渣重熔H13钢进行对比研究，重点分析了国内外H13钢在杂质元素和夹杂物控制水平上的差距。结果表明，在试验样品中，国产H13钢中硫和TO的质量分数均高于国外，其中硫质量分数高0.001 2%～0.002 0%，TO质量分数高0.000 6%～0.000 8%。所有试样中主要夹杂物均为Al2O3、MgO·Al2O3、CaO·Al2O3和CaO·MgO·Al2O3。国产H13钢与国外相比，尺寸大于5 μm的夹杂物数量较多，小于2 μm的夹杂物数量较少，夹杂物尺寸波动范围总体更大；国外H13钢夹杂物成分波动范围较窄，尺寸均匀，夹杂物形状接近球形的比例高。

Contrast of inclusions in domestic and imported electroslag remelting H13 steel

In order to find out the shortcomings in the control of inclusions of domestic electroslag remelting H13 steel, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and inclusion analysis system (INCA Steel) were employed to compare the inclusions in domestic and imported H13 steel, and the gaps in harmful element and control of inclusions were analyzed specifically. The results showed the mass fractions of S and TO in domestic H13 steel were more than 0.001 2% 0.002 0% and 0.000 6% 0.000 8%, respectively, compared to imported H13 steel. The inclusions of the four kinds of H13 steel were Al2O3, MgO·Al2O3, CaO·Al2O3 and CaO·MgO·Al2O3. Compared with the imported H13 steel, the domestic H13 steel had more inclusions with the size larger than 5 μm and fewer inclusions with the size smaller than 2 μm, and the range of inclusion size was much bigger. For the imported H13 steel, the inclusion composition varied within a limited range, the inclusion size was more even, and the high proportion of inclusions close to sphere was higher.