Ar-H<sub>2</sub>O-H<sub>2</sub>气氛下Fe-C-Mn薄带脱碳试验研究

孟凡峻; 艾立群; 洪陆阔; 周玉青; 周美洁; 刘新亮

doi:10.7513/j.issn.1004-7638.2021.05.021

Ar-H₂O-H₂气氛下Fe-C-Mn薄带脱碳试验研究

doi: 10.7513/j.issn.1004-7638.2021.05.021

华北理工大学冶金与能源学院，河北唐山 063210

基金项目: 河北省自然科学基金（E2019209160）；河北省研究生创新资助项目（CXZZBS2020131，CXZZBS2021100）

详细信息

作者简介:
孟凡峻（1996—），男，硕士研究生，研究方向：炼钢新技术，E-mail：1358692268@qq.com;

通讯作者:
洪陆阔（1986—），男，博士，研究方向：炼钢新技术与资源综合利用，E-mail：honglk@ncst.edu.cn

中图分类号: TF76
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出版历程
- 收稿日期: 2021-07-19
- 刊出日期: 2021-10-30

Experimental study on decarbonization of Fe -C-Mn thin strips in Ar-H₂O-H₂ atmosphere

Collegee of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China

摘要

摘要: 为研究Ar-H₂O-H₂气氛下含锰铁碳合金薄带不同锰含量、脱碳温度对脱碳效果的影响，以初始碳含量为3.90%，锰含量分别为0、0.30%、0.49 %的1 mm厚的含锰铁碳合金薄带为研究对象，在Ar-H₂O-H₂的弱氧化性气氛下进行脱碳试验，通过对不同气氛条件下薄带表面进行XRD检测分析，表明脱碳气氛P_H₂O/P_H₂不宜超过0.53。分别在1293、1353、1413 K温度下脱碳5、10、20、30 min。结果表明：在一定范围内随合金薄带中锰含量的增加，平均脱碳量增加；脱碳温度的升高显著提高了薄带的平均脱碳量。
- 固态炼钢 /
- Fe-C-Mn合金 /
- 薄带 /
- 气固反应 /
- 脱碳
Abstract: In order to study the influence of Mn content and decarburization temperature on decarburization effect of ferromanganese carbon alloy thin strip in Ar-H₂O-H₂ atmosphere, the ferromanganese carbon alloy thin strip in 1mm thickness with initial carbon content of 3.90% and manganese content of 0, 0.30% and 0.49% was used to conduct decarburization experiment in the weak oxidizing atmosphere of Ar-H₂O-H₂. XRD analysis was done on the surface of thin strip after decarburization under different atmosphere conditions. It is indicated that the decarbonization atmosphere P_H₂O/P_H₂ should not exceed 0.53. Decarburization was carried out at 1 293, 1 353 and 1 413 K for 5, 10, 20 and 30 min, respectively. The results show that the amount of decarburization increases obviously with increasing Mn content. The increase of decarburization temperature significantly increases average decarburization amount of thin strip.
- solid-state steelmaking /
- Fe-C-Mn alloy /
- thin strip /
- gas-solid reaction /
- decarburization

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图 1 铜模喷铸示意

Figure 1. Schematic diagram of spray casting of copper mold

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图 2 气固反应脱碳装置示意

Figure 2. Schematic diagram of gas solid reaction decarburization device

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图 3 含锰薄带初始试样XRD谱

Figure 3. XRD patterns of initial thin strip containing manganese

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图 4 Fe-C-Mn相图

Figure 4. Fe-C-Mn phase diagram

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图 5 不同P_H₂O/P_H₂薄带表面状况

Figure 5. Surface conditions of strip after decarburization under different P_H₂O/P_H₂

（a）P_H₂O/P_H₂=0.42；（b）P_H₂O/P_H₂=0.53；（c）P_H₂O/P_H₂=0.91；（d）P_H₂O/P_H₂=1.76

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图 6 1413 K温度下脱碳后薄带表面XRD分析

Figure 6. XRD analysis of strip surface after decarburization at 1413 K

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图 7 不同P_H₂O/P_H₂分压比脱碳对比

Figure 7. Comparison of decarburization effect of strip after decarburization under different P_H₂O/P_H₂ partial pressure ratios

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图 8 不同Mn含量对脱碳的影响

Figure 8. Influence of different Mn contents on decarbonization

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图 9 不同脱碳温度碳含量随时间变化

Figure 9. The carbon content vs oxidization time under different decarburization temperatures

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图 10 脱碳反应级数的确定

Figure 10. Determination of decarbonization reaction series

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图 11 lnk与(1/T)×10⁴的关系

Figure 11. Relationship between lnk and (1/T)×10⁴

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表 1 各温度下的(1/T)×10⁴和lnk

Table 1. (1/T)×10⁴ and lnk at different temperature

温度/K (1/T)×10⁴/K⁻¹ k/min⁻¹ lnk

1293 7.73 0.02312 −3.76706
1353 7.39 0.0343 −3.37261
1413 7.08 0.06456 −2.74016

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