东北大学冶金学院,沈阳 110819
倪卓文 (1999—),男,博士; E-mail:nzwneu@163.com
朱红春 (1989—),男,副教授,博士生导师; E-mail:zhuhc@smm.neu.edu.cn
收稿:2024-04-09,
纸质出版:2024-11-30
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倪卓文,朱红春,李花兵等.H13模具钢电渣锭中夹杂物的类型以及分布规律分析[J].特殊钢,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.
倪卓文,朱红春,李花兵等.H13模具钢电渣锭中夹杂物的类型以及分布规律分析[J].特殊钢,2024,45(06):48-52. DOI: 10.20057/j.1003-8620.2024-00083.
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.
使用2 t电渣重熔炉进行H13模具钢的制备。结合热力学计算、实验观察与统计分析,系统地研究了熔速为0.12 kg/s条件下H13模具钢在电渣锭中的夹杂物类型、尺寸、形貌以及分布规律。结果表明,H13模具钢中主要的夹杂物类型为MgO·Al
2
O
3
和球形的CaO·MgO·Al
2
O
3
。在电渣重熔过程中,MgO·Al
2
O
3
夹杂物会演变为MgO·Al
2
O
3
+CaO·Al
2
O
3
混合类型夹杂物或者CaO·MgO·Al
2
O
3
类夹杂物。同时,会有少量的S以各类夹杂物为形核质点进行析出,析出的成分主要为CaS,生成CaS包裹的CaO·MgO·Al
2
O
3
类夹杂物。在电渣锭中夹杂物尺寸主要以<5 μm为主,5~<10 μm的夹杂物较少,≥10 μm的夹杂物仅有少量存在。这与电极中夹杂物的分布类似,但总体的夹杂物数量有所减少。径向分布呈现先增加再减少的趋势,在二分之一半径附近出现夹杂物的富集。
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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