Effect of magnesium addition on inclusions in H13 die steel

被引：21
|
作者：
Wu, Zheng [1 ]
Li, Jing [1 ]
Shi, Cheng-bin [1 ]
Wang, Liang-liang [1 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2014年 / 21卷 / 11期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
die steel; inclusions; magnesium; deoxidation; thermodynamics; MGO-CENTER-DOT-AL2O3 SPINEL INCLUSIONS; FE-CR ALLOYS; DEOXIDATION EQUILIBRIA; NONMETALLIC INCLUSIONS; ALUMINUM; NI; FATIGUE; POWDER; IRON; MG;
D O I：
10.1007/s12613-014-1010-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 MnS inclusions are changed into nearly spherical MgO center dot Al2O3 spinel and spherical MgO center dot MgS inclusions, respectively. The number of inclusions larger than 1 mu m decreases and the number of inclusions smaller than 1 mu m increases with increasing magnesium content. V(N,C) precipitates around MgO center dot Al2O3 and MgO center dot MgS inclusions during solidification of liquid steel. The densities of MgO center dot 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
收藏
页码：1062 / 1067
页数：6
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