Ni Zhuowen,Zhu Hongchun,Li Huabing,et al.Analysis of the Types and Distribution of Inclusions in H13 Die Steel Electroslag Ingots[J].Special Steel,2024,45(06):48-52.
Ni Zhuowen,Zhu Hongchun,Li Huabing,et al.Analysis of the Types and Distribution of Inclusions in H13 Die Steel Electroslag Ingots[J].Special Steel,2024,45(06):48-52. DOI: 10.20057/j.1003-8620.2024-00083.
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 calculation, 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·Al
2
O
3
and spherical CaO·MgO·Al
2
O
3
. During the remelting process of electric slag, MgO·Al
2
O
3
inclusion evolves into MgO·Al
2
O
3
+CaO·Al
2
O
3
mixed type inclusion or class CaO·MgO·Al
2
O
3
inclusion. At the same time, a small amount of S will be precipitated with various inclusions as nucleation particles. The precipitated component is mainly CaS, forming CaO·MgO·Al
2
O
3
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.
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