Effect of magnesium addition on inclusions in H13 die steel

被引：0

作者：

Zheng Wu

Jing Li

Cheng-bin Shi

Liang-liang Wang

机构：

[1] StateKeyLaboratoryofAdvancedMetallurgy,UniversityofScienceandTechnologyBeijing

来源：

International Journal of Minerals Metallurgy and Materials | 2014年 / 21卷 / 11期

关键词：

die steel; inclusions; magnesium; deoxidation; thermodynamics;

D O I：

暂无

中图分类号：

TG142.45 [工具钢];

学科分类号：

080502 ;

摘要：

The effect of magnesium addition on the number, morphology, composition, size, and density of inclusions in H13 die steel was studied. The results show that the total oxygen content in the steel can be significantly decreased to 0.0008wt%. Al2O3 and Mn S inclusions are changed into nearly spherical Mg O·Al2O3 spinel and spherical Mg O·Mg S inclusions, respectively. The number of inclusions larger than 1 μm decreases and the number of inclusions smaller than 1 μm increases with increasing magnesium content. V(N,C) precipitates around Mg O·Al2O3 and Mg O·Mg S inclusions during solidification of liquid steel. The densities of Mg O·Al2O3 spinel inclusions are lower than that of alumina inclusions. With increasing magnesium content in the Mg-containing inclusions, the density of inclusions decreases, leading to the improvement of inclusion removal efficiency.

引用

页码：1062 / 1067

页数：6

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