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Evolution mechanism of inclusions in plate steel during secondary refining process |
HAO Xin, WANG Xin-hua, WANG Wan-jun |
(School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China) |
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Abstract Characteristics of inclusions in plate steel refined by LF-Calcium treatment-RH process was studied by industrial experiments. Thermodynamic calculation was performed to study the evolution mechanism of inclusions during calcium treatment. It was found that the mass percent of T[O] and number density of inclusions decreased,average size of inclusions increased during secondary refining processes. After calcium treatment,inclusions were in CaO-MgO-Al2O3-CaS quaternary system. After RH refining,inclusions were in CaO-MgO-Al2O3 ternary system. The mass percent of CaO of inclusions decreased and the Al2O3 content of inclusions increased during RH refining. Thermodynamic calculation results showed that CaS could form directly in molten steel as well as through the reaction between molten steel and calcium aluminate inclusions. However,the formation of CaS was not available after RH refining.
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Received: 18 March 2014
Published: 18 March 2015
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[1] |
康永林.中国中厚板产品生产现状及发展趋势[J].中国冶金, 2012, 22(9):1-
|
[1] |
康永林.中国中厚板产品生产现状及发展趋势[J].中国冶金, 2012, 22(9):1-
|
[2] |
王新华.普通热轧钢材的合理洁净度及生产工艺探讨[J].河南冶金, 2003, 11(6):3-
|
[2] |
王新华.普通热轧钢材的合理洁净度及生产工艺探讨[J].河南冶金, 2003, 11(6):3-
|
[3] |
李强, 王新华, 李海波, 等.低合金高强钢中非金属夹杂物的改性[J].北京科技大学学报, 2012, 34(11):1262-
|
[3] |
李强, 王新华, 李海波, 等.低合金高强钢中非金属夹杂物的改性[J].北京科技大学学报, 2012, 34(11):1262-
|
[4] |
刘建华, 包燕平, 李太全, 等.高级别管线钢精炼工艺分析[J].北京科技大学学报, 2007, 29(8):789-
|
[4] |
刘建华, 包燕平, 李太全, 等.高级别管线钢精炼工艺分析[J].北京科技大学学报, 2007, 29(8):789-
|
[5] |
Choudhary S K, Ghosh A.Thermodynamic evaluation of formation of oxide-sulfide duplex inclusions in steel[J].ISIJ International, 2008, 48(11):1552-
|
[5] |
Choudhary S K, Ghosh A.Thermodynamic evaluation of formation of oxide-sulfide duplex inclusions in steel[J].ISIJ International, 2008, 48(11):1552-
|
[6] |
邓志银, 朱苗勇, 钟保军, 等.不同脱氧方式对钢中夹杂物的影响[J].北京科技大学学报, 2012, 34(11):1256-
|
[6] |
邓志银, 朱苗勇, 钟保军, 等.不同脱氧方式对钢中夹杂物的影响[J].北京科技大学学报, 2012, 34(11):1256-
|
[7] |
Kang Y, Thunman M, Du S C, et al.Aluminum deoxidation equilibrium of molten iron-aluminum alloy with wide aluminum composition range at 1873K[J].ISIJ international, 2009, 49(10):1483-
|
[7] |
Kang Y, Thunman M, Du S C, et al.Aluminum deoxidation equilibrium of molten iron-aluminum alloy with wide aluminum composition range at 1873K[J].ISIJ international, 2009, 49(10):1483-
|
[8] |
Wang X H, Jiang M, Chen B, et al.Study on formation of non-metallic inclusions with lower melting temperatures in extra low oxygen special steels[J].Science China, 2012, 55(7):1863-
|
[8] |
Wang X H, Jiang M, Chen B, et al.Study on formation of non-metallic inclusions with lower melting temperatures in extra low oxygen special steels[J].Science China, 2012, 55(7):1863-
|
[9] |
Guo J, Cheng S S, Cheng Z J.Mechanism of non-metallic inclusion formation and modification and their deformation during compact strip production (CSP) process for aluminum-killed steel[J].ISIJ International, 2013, 53(12):2142-
|
[9] |
Guo J, Cheng S S, Cheng Z J.Mechanism of non-metallic inclusion formation and modification and their deformation during compact strip production (CSP) process for aluminum-killed steel[J].ISIJ International, 2013, 53(12):2142-
|
[10] |
Suito H, Inoue R.Thermodynamics on control of inclusions composition in ultraclean steels[J].ISIJ International, 1996, 36(5):528-
|
[10] |
Suito H, Inoue R.Thermodynamics on control of inclusions composition in ultraclean steels[J].ISIJ International, 1996, 36(5):528-
|
[11] |
Ye G Z, Jonsson P, Lund T.Thermodynamics and kinetics of the modification of Al2O3 inclusions[J].ISIJ International, 1996, 36(Supplement):S105-
|
[11] |
Ye G Z, Jonsson P, Lund T.Thermodynamics and kinetics of the modification of Al2O3 inclusions[J].ISIJ International, 1996, 36(Supplement):S105-
|
[12] |
王新华, 李秀刚, 李强, 等.管线钢板中条串状-系非金属夹杂物的控制[J].金属学报, 2013, 49(5):553-
|
[12] |
王新华, 李秀刚, 李强, 等.管线钢板中条串状-系非金属夹杂物的控制[J].金属学报, 2013, 49(5):553-
|
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