含铈镁H13模具钢电渣重熔渣系的研究

doi:10.12068/j.issn.1005-3026.2023.08.007

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (8): 1111-1118.DOI: 10.12068/j.issn.1005-3026.2023.08.007

含铈镁H13模具钢电渣重熔渣系的研究

郑立春，彭博，娄健，姜周华

(东北大学冶金学院，辽宁沈阳110819)

发布日期:2023-08-15
通讯作者: 郑立春
作者简介:郑立春(1987-)，男，辽宁沈阳人，东北大学副教授，博士生导师; 姜周华(1963-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(U1908223，51904067).

Study on the Electroslag Remelting Slag for H13 Die Steel Containing Ce and Mg

ZHENG Li-chun， PENG Bo， LOU Jian， JIANG Zhou-hua

School of Metallurgy， Northeastern University， Shenyang 110819， China.

Published:2023-08-15
Contact: JIANG Zhou-hua
About author:-
Supported by:
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摘要/Abstract

摘要： 稀土和镁处理可显著提升钢质洁净度和细化钢中碳化物，但电渣重熔过程稀土和镁极易烧损.为抑制稀土和镁的烧损，设计了两组含Ce₂O₃和MgO的电渣渣系，分别为55%CaF₂-30%Ce₂O₃-10%MgO-5%Al₂O₃(1#)和60%CaF₂-30%Ce₂O₃-10%MgO(2#).利用管式电阻炉对H13模具钢进行Ce，Mg协同处理，并研究H13钢与上述渣系在1873K的渣金平衡行为.结果表明，H13钢中主要夹杂物为Ce₂O₃和MgO，部分Ce₂O₃夹杂物表面包裹MgO.Ce，Mg处理15min后，钢中溶解Ce基本全部被烧损，仅剩Ce₂O₃夹杂物中的Ce.在整个脱氧周期内，钢中溶解Mg含量变化幅度很小，在60min时，1#和2# H13钢中溶解Mg质量分数分别为0.003 4%和0.005 3%，1#和2#渣系中MgO溶解度分别为10.6%和6.7%，MgO均过饱和，因此两组渣系对MgO夹杂物的吸收能力均非常微弱.热力学计算表明，渣系中的Al₂O₃组元和少量SiO₂杂质，均导致Ce，Mg严重烧损.

关键词: 铈；镁；电渣重熔；夹杂物；收得率；模具钢

Abstract: RE and Mg co-treatment can significantly improve the cleanliness of steel and refine carbide， but RE and Mg are prone to be burned during electroslag remelting. Therefore， two kinds of electroslags containing Ce₂O₃ and MgO were designed， which are 55% CaF₂-30% Ce₂O₃-10% MgO-5% Al₂O₃ (1#) and 60% CaF₂-30% Ce₂O₃-10% MgO (2#)， respectively. Ce and Mg co-treatment of H13 die steel was carried out using a resistance-heated tube furnace， and the slag-metal equilibrium behavior between H13 steel and the aforementioned slags at 1873K was studied. The results show that the main inclusions in H13 steel are Ce₂O₃ and MgO. Some Ce₂O₃ inclusions are coated with MgO. At 15min after adding Ce and Mg， the dissolved Ce in the steel was almost completely burned， and only insoluble Ce in Ce₂O₃ inclusions was remained. During the whole deoxidation period， the content of dissolved Mg in steel changed little. The contents of dissolved Mg in 1# and 2# H13 steel at 60min were 0.0034% and 0.0053%， respectively， MgO solubility in 1# and 2# slags are 10.6% and 6.7%， respectively. Due to MgO supersaturation， both slags have very weak absorption capacity for MgO inclusions. The rmodynamic calculation shows that both the Al₂O₃ component and minor amounts of SiO₂ in the slags lead to serious burning loss of Ce and Mg.

Key words: cerium; magnesium; electroslag remelting; inclusions; yield; die steel

中图分类号:

TF769.2

郑立春，彭博，娄健，姜周华. 含铈镁H13模具钢电渣重熔渣系的研究[J]. 东北大学学报（自然科学版）, 2023, 44(8): 1111-1118.

ZHENG Li-chun， PENG Bo， LOU Jian， JIANG Zhou-hua. Study on the Electroslag Remelting Slag for H13 Die Steel Containing Ce and Mg[J]. Journal of Northeastern University(Natural Science), 2023, 44(8): 1111-1118.

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含铈镁H13模具钢电渣重熔渣系的研究

Study on the Electroslag Remelting Slag for H13 Die Steel Containing Ce and Mg

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