Dynamic Evolution of Inclusions in AlMg Deoxidation Melts

doi:10.12068/j.issn.1005-3026.2014.09.013

Abstract

Abstract: The inclusions characteristics and dynamic evolution of hightemperature experimental melts with different S and O content were studied by using SEMEDS and CSLM. The results showed that most of MgO in the deoxidation melt is spherical， but the MgO·Al2O3 presents irregular shape. Large inclusions of Al2O3 is easy to form in Alkilled molten steel through travelling， collision and aggregation. However， the characteristics of inclusions in AlMg complex deoxidation melts are different， depending on the content of［Al］，［Mg］and［S］. When the content of ［Mg］ and ［Al］ meets the condition of MgO， the inclusions show no obvious aggregation tendency， even have isolated and dispersed distribution. When the content of ［Mg］ and ［Al］ meets the condition of MgO·Al2O3， the inclusions also show no obvious aggregation tendency， but the size of single particle is larger than that of MgO particles. When the content meets the formation condition of MgO and MgS simultaneously， the aggregation tendency of the inclusions is obvious. It is easily speculated that the sulphides promote the aggregation of the inclusions.

Key words: magnesium, deoxidation, inclusion, thermodynamic, dynamic evolution

CLC Number:

TF701

ZHANG Tongsheng， WANG Deyong， ZHANG Yongqi， JIANG Maofa. Dynamic Evolution of Inclusions in AlMg Deoxidation Melts[J]. Journal of Northeastern University Natural Science, 2014, 35(9): 1270-1274.

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