Analysis of the Types and Distribution of Inclusions in H13 Die Steel Electroslag Ingots
The H13 die steel was prepared by 2 t electroslag remelting furnace.Combined with thermodynamic calcula-tion,experimental observation and statistical analysis,the type,size,morphology and distribution of inclusions in H13 die steel in electroslag ingot under a melting rate of 0.12 kg/s were systematically studied.The results show that the main inclusions in H13 die steel are MgO·Al2O3 and spherical CaO·MgO·Al2O3.During the remelting process of electric slag,MgO·Al2O3 inclusion evolves into MgO·Al2O3+CaO·Al2O3 mixed type inclusion or class CaO·MgO·Al2O3 inclusion.At the same time,a small amount of S will be precipitated with various inclusions as nucleation particles.The precipitated com-ponent is mainly CaS,forming CaO·MgO·Al2O3 inclusions wrapped by CaS.The size of inclusions in the electroslag ingot is mainly less than 5 μm,5-10 μm inclusions are less,and only a small amount of inclusions larger than 10 μm exist.The distribution is similar to that of the electrode,but the overall number of inclusions is reduced.The radial distribution shows a trend of increasing first and then decreasing,and the enrichment of inclusions occurs near half of the radius.
Electroslag RemeltingH13 Die SteelTypes of InclusionsDistribution of Inclusions
万方数据
维普
